Mast base

Abstract

 Mast base (3) for supporting a mast (6), particularly a truss mast for reception and transmission of signals, comprising a first basis member (1) and a second basis member (2) which in the placed condition are mutually connected, wherein the first basis member at its side which faces the second basis member is provided with a first recess (31) bounding a pouring space between the first basis member and the second basis member, wherein the first basis member and the second basis member are connected to each other by an in situ hardened concrete mass (57) that is disposed in the pouring space between the first basis member and the second basis member, wherein the mast (6) is placed on the first basis member (1) and the second basis member (2) outside of the in situ hardened concrete mass (57).

Description

BACKGROUND OF THE INVENTION

[0001] The invention relates to a mast base for supporting a truss mast for reception and transmission of signals.

[0002] A known mast base for supporting a truss mast comprises a hardened concrete mass and attachment points arranged thereon for supporting the truss mast. The know mast base is realised by excavating a spacious building pit at a mast building site. In the building pit shuttering is then arranged, after which the concrete mass, which is still liquid at that moment, can be poured into the shuttering. After the concrete mass has fully hardened after approximately three weeks, the shuttering can be removed. After approximately four weeks the mast base is ready to support the truss mast.

[0003] It is an object of the invention to provide an improved mast base and an improved method for manufacturing the mast base.

SUMMARY OF THE INVENTION

[0004] According to a first aspect the invention provides a mast base for supporting a mast, particularly a truss mast for reception and transmission of signals, comprising a first basis member and a second basis member which in the placed condition are mutually connected, wherein the first basis member at its side which faces the second basis member is provided with a first recess bounding a pouring space between the first basis member and the second basis member, wherein the first basis member and the second basis member are connected to each other by an in situ hardened concrete mass that is disposed in the pouring space between the first basis member and the second basis member, wherein the mast is placed on the first basis member and the second basis member preferably outside of the in situ hardened concrete mass. In that case the first basis member and the second basis member can themselves form the shuttering for a relatively small volume of fluid, hardening concrete mass.

[0005] In one embodiment the second basis member at its side which faces the first basis member is provided with a second recess situated opposite the first recess, which second recess together with the first recess bounds the pouring space between the first basis member and the second basis member. In that case the first recess and the second recess can together form the pouring space for the relatively small volume of fluid, hardening concrete mass.

[0006] In one embodiment the pouring space is bounded at the lower side by the subgrade on which the first basis member and the second basis member are placed. The pouring space is able to receive the fluid, hardening concrete mass via its upper side and keep it confined within the boundaries.

[0007] In one embodiment the pouring space has a rectangular circumference or contour. The rectangular contour may in the longitudinal direction extend along a considerable part of the basis members, as a result of which a large adhesion surface of the concrete mass on the basis members can be realised.

[0008] In one embodiment the pouring space is situated centrally in the mast base. Because of the central position of the pouring space sufficient room is left around the pouring space for the prefab arrangement of attachment points for attaching the mast.

[0009] In one embodiment the pouring space is situated decentralised in the mast base. A decentralised position of the pouring space in the mast base can provide a more advantageous distribution of forces of the mast over the mast base than would be the case if the pouring space had been situated centrally in the mast base.

[0010] In one embodiment the first basis member is larger than the second basis member. Although similarly shaped basis members during manufacturing can be manufactured by means of the same moulds and during transport may have a more advantageous transport weight, a larger and heavier first basis member and a smaller and lighter second basis member in the placed condition can provide a more advantageous distribution of forces of the mast over the mast base than would be the case if the basis members had been similar.

[0011] In one embodiment the first basis member and the second basis member at the sides facing each other are provided with reinforcements extending from the basis members into the pouring space. The reinforcements extend through the in situ hardened concrete mass and can reinforce the concrete mass, and thus the connection between the first basis member and the second basis member.

[0012] In one embodiment the first basis member and the second basis member partially overlap each other. At the location of the overlap the second basis member can rest on the first basis member. The load of the second basis member on the subgrade of the mast building site can be reduced as a result.

[0013] In one embodiment at the location of the overlap the first basis member is provided with a stepped support edge on which, in the placed condition, the second basis member rests. The second basis member can at the location of the overlap rest on the first basis member. The load of the second basis member on the subgrade of the mast building site can as a result be reduced.

[0014] In one embodiment the mast is provided with several legs that have been arranged in a distributed manner over the mast base on the first basis member and the second basis member, wherein the connection of the in situ hardened concrete mass extends in between the legs. The distribution of forces of the mast on the mast base can thus be proportionally distributed over the mast base.

[0015] In one embodiment the mast is provided with a vertical centre line, wherein the vertical centre line of the mast extends through the connection of the in situ hardened concrete mass. The distribution of forces of the mast on the mast base can thus be proportionally distributed over the mast base.

[0016] In one embodiment the mast building site is provided with several support piles disposed in a subgrade with which support piles the first basis member and the second basis member are connected in the placed condition. The support piles are able to transfer the forces exerted on the mast base as a result of the mast placed thereon to the subgrade of the mast building site, as a result of which a more stable mast base can be realised.

[0017] In one embodiment the first basis member and the second basis member are provided with positioning channels, wherein the support piles are provided with reinforcements extending in the positioning channels, wherein the reinforcements of the support piles are connected to the first basis member and the second basis member, respectively, by a hardened concrete mass poured in situ. The support piles are able to transfer the forces exerted on the mast base as a result of the mast placed thereon to the subgrade of the mast building site, as a result of which a more stable mast base can be realised.

[0018] In one embodiment the mast building site is provided with a building pit having a depth that substantially equals the height of the basis members, wherein the mast base in the placed condition is situated substantially below the surrounding ground level. Due to the lower position of the mast base with respect to the surrounding ground level the mast base can be hidden from view. Moreover the building pit can be filled with soil afterwards in order to envelop the mast base in the building pit. As a result a more stable mast base can be realised.

[0019] According to a second aspect the invention provides a method for manufacturing a mast base for supporting a mast, particularly a truss mast for reception and transmission of signals, wherein the mast base is provided with a first basis member and a second basis member which in the placed condition are mutually connected, wherein the first basis member at its side which faces the second basis member is provided with a first recess which between the first basis member and the second basis member bounds a pouring space, wherein the first basis member and the second basis member are connected to each other by an in situ hardened concrete mass disposed in the pouring space between the first basis member and the second basis member, wherein the method comprises transporting the first basis member and the second basis member to the mast building site, placing the first basis member on the subgrade of the mast building site, placing the second basis member in abutting contact with the first basis member at the mast building site, in situ filling the pouring space that is bounded between the first basis member and the second basis member with a fluid, hardening concrete mass, leaving the fluid, hardening concrete mass to harden in situ in order for the in situ hardened concrete mass to form a connection between the first basis member and the second basis member, and placing the mast on the first basis member and the second basis member of the mast base preferably outside of the in situ hardened concrete mass. In that case the first basis member and the second basis member can themselves form the shuttering for a relatively small volume of fluid hardening concrete mass.

[0020] In one embodiment the first basis member is provided with a stepped support edge, wherein the method comprises at the location of the support edge placing the first basis member and the second basis member in mutual overlap, leaving the second basis member to rest on the first basis member. The load of the second basis member on the subgrade of the mast building site can as a result be reduced.

[0021] In one embodiment the mast is provided with several legs, wherein the method comprises arranging the legs of the mast in a distributed manner over the mast base on the first basis member and the second basis member, wherein at least a part of the in situ hardened concrete mass is situated underneath the mast in between the legs. The forces of the mast exerted on the mast base can thus be proportionally distributed over the mast base.

[0022] In one embodiment the method comprises disposing support piles in the subgrade of the mast building site, leaving the basis members placed on the mast building site to rest on the support piles, and connecting the support piles to the basis members. The support piles are able to transfer the forces exerted on the mast base as a result of the mast placed thereon to the subgrade of the mast building site, as a result of which a more stable mast base can be realised.

[0023] In one embodiment the first basis member and the second basis member are provided with positioning channels, wherein the support piles are provided with reinforcements extending in the positioning channels, wherein the method comprises pouring a hardened concrete mass poured in situ in the positioning channels in order to connect the reinforcements of the support piles to the first basis member and the second basis member, respectively. The support piles are able to transfer the forces exerted on the mast base as a result of the mast placed thereon to the subgrade of the mast building site, as a result of which a more stable mast base can be realised.

[0024] In one embodiment the method comprises excavating a building pit in the subgrade of the mast building site wherein the building pit has a depth that substantially equals the height of the basis members, and placing the basis members in the building pit, wherein the basis members are situated substantially below the surrounding ground level. Due to the lower position of the mast base with respect to the surrounding ground level the mast base can be hidden from view. Moreover the building pit can be filled with soil afterwards in order to envelop the mast base in the building pit. In that way a more stable mast base can be realised.

[0025] The aspects and measures described in this description and the claims of the application and/or shown in the drawings of this application may where possible also be used individually. Said individual aspects may be the subject of divisional patent applications relating thereto. This particularly applies to the measures and aspects that are described per se in the sub claims.

SHORT DESCRIPTION OF THE DRAWINGS

[0026] The invention will be elucidated on the basis of a number of exemplary embodiments shown in the attached schematic drawings, in which:

figure 1 shows a schematic view of a phone mast placed on a mast base according to the invention;

figures 2-5 show schematic views of the method of placing the mast base according to figure 1;

figure 6 shows an alternative embodiment of the mast base according to the invention.

DETAILED DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 shows a mast base 3 in placed condition at a mast building site. The mast base 3 is provided with a first prefab basis member 1, a second prefab basis member 2 and an in situ hardened concrete mass 57 situated in between them. In this example the mast base 3 supports a phone mast 6 for reception and transmission of mobile telephone and data signals.

[0028] As shown in figure 2 the first prefab concrete basis member 1 comprises a rectangular concrete slab 10 in this example having a largest length C of 600 centimetres, a largest width D of 343.5 centimetres and a largest height E of 60 centimetres. At the longitudinal side which faces the second basis member 2, the first basis member 1 is provided with a first support element 11 and a second support element 12 that project from a longitudinal surface 13 extending between the first support element 11 and the second support element 12 over a considerable part of the length C of the concrete slab 10. The longitudinal surface 13, the first support element 11 and the second support element 12 jointly bound a first substantially rectangular recess 31 in the first basis member 1.

[0029] The first basis member 1 is reinforced with rods, reinforcing steel or reinforcements and is furthermore provided with reinforcements 33 that extend from the first basis member 1 from the longitudinal surface 13 through the first recess 31. The first basis member 1 is provided with a first vertical positioning channel 51, a second vertical positioning channel 52 and a third vertical positioning channel 53, which extend from the upper surface to the lower surface through the first basis member 1. The positioning channels 51-53 are arranged with respect to each other in the first basis member 1 in the vertices of a notional triangle.

[0030] The first support element 11 has a stepped shape and is provided with an upwardly oriented, horizontal first support surface 15 that is receded from the upper surface of the concrete slab 10. The first support surface 15 is situated halfway the height E of the concrete slab 10 and extends transverse to the longitudinal direction of the concrete slab 10 in this example over 27 centimetres. The first support surface 15 on the one side merges into a vertical first abutment surface 14 extending from the first support surface 15 to the upper surface of the concrete slab 10 and on the other side merges into a vertical second abutment surface 16 extending from the first support surface 15 to the lower surface of the concrete slab 10.

[0031] The second support element 12 has a stepped shape and is provided with an upwardly oriented horizontal second support surface 18 that is receded from the upper surface of the concrete slab 10. The second support surface 18 is situated halfway the height E of the concrete slab 10 and extends transverse to the longitudinal direction of the concrete slab 10 in this example over 27 centimetres. The second support surface 18 on the one side merges into a vertical third abutment surface 17 extending from the second support surface 18 to the upper surface of the concrete slab 10 and on the other side merges into a vertical fourth abutment surface 19 extending from the third support surface 18 to the lower surface of the concrete slab 10.

[0032] Apart from the dimensions, the second prefab concrete basis member 2 as regards shape is substantially equal to the first basis member 1. The second basis member 2 however is placed upside down with respect to the first basis member 1. The second basis member 2 comprises a rectangular concrete slab 20 with in this example a largest length C of 600 centimetres, a largest width G of 283.5 centimetres and a largest height E of 60 centimetres. At the longitudinal side which faces the first basis member 1, the second basis member 2 is provided with a third support element 21 and a fourth support element 22 that project from a longitudinal surface 23 extending between the third support element 21 and the fourth support element 22 over a considerable part of the length C of the concrete slab 20. The longitudinal surface 23, the third support element 21 and the fourth support element 22 jointly bound a second substantially rectangular recess 32 in the second basis member 2.

[0033] The second basis member 2 is reinforced with rods, reinforcing steel or reinforcements and is furthermore provided with reinforcements 37 that extend from the second basis member 2 from the longitudinal surface 23 through the second recess 32. The second basis member 2 is provided with a fourth vertical positioning channel 54 and a fifth positioning channel 55, which extend from the upper surface to the lower surface through the second basis member 2.

[0034] The third support element 21 has a stepped shaped and is provided with a downwardly oriented, horizontal third support surface 25 which is receded from the lower surface of the concrete slab 20. The third support surface 25 is situated halfway the height E of the concrete slab 20 and extends transverse to the longitudinal direction of the concrete slab 20 in this example over 27 centimetres. The third support surface 25 on the one side merges into a vertical fifth abutment surface 24 extending from the third support surface 25 to the lower surface of the concrete slab 20 and on the other side merges into a vertical sixth abutment surface 26 extending from the third support surface 25 to the upper surface of the concrete slab 20.

[0035] The fourth support element 22 has a stepped shape and is provided with a downwardly oriented, horizontal fourth support surface 28 that is receded from the lower surface of the concrete slab 20. The fourth support surface 28 is situated halfway the height E of the concrete slab 20 and extends transverse to the longitudinal direction of the concrete slab 20 in this example over 27 centimetres. The fourth support surface 28 on the one side merges into a vertical seventh abutment surface 27 extending from the fourth support surface 28 to the lower surface of the concrete slab 20 and on the other side merges into a vertical eighth abutment surface 29 that extends from the fourth abutment surface 28 to the upper surface of the concrete slab 20.

[0036] As shown in figure 4 the first basis member 1 is provided with a first poured anchor or attachment point 34 and a second poured anchor or attachment point 35 that are mutually spaced apart. The second basis member 2 is provided with a third poured anchor or attachment point 36. Each attachment point 34, 35, 36 comprises a group of in this example three attachment sleeves placed in a triangle in the upper surface of the concrete slab 10, and extending vertically upwards. The attachment points 34-36 in placed condition of the first basis member 1 and the second basis member 2 are mutually positioned in the vertices of a notional equilateral triangle. The number of attachment sleeves, the shape and dimensions thereof depend on the type of mast that will be placed on the mast base 3.

[0037] In addition the basis members 1, 2 can be provided with fencing anchors, which are not shown and are placed at regular intervals along the outer contour of the mast base 1. Fencing can be placed thereon which counteracts that unauthorised people gain access to the phone mast.

[0038] The first basis member 1 and the second basis member 2, as described above, are prefab or manufactured beforehand in the factory. The first basis member 1 and the second basis member 2 weigh approximately 25,000 kilos and 19,000 kilos, respectively, and can be transported in their entirety on a truck from the factory to the mast building site.

[0039] Figure 6 shows an alternative embodiment of the mast base 103 wherein the two basis members 101, 102 are formed substantially identical to each other, both as regards the shape and as regards the dimensions. The basis members 101, 102 are substantially equal to the basis members as described above, with the exception of the largest width H, which is the same for both basis members 101, 102. As a result the basis member 101, 102 are similar and similar moulds can be used to manufacture the basis members 101, 102 in the factory. The first basis member 101 moreover is quite a bit lighter with respect to the first basis member 1 as shown in figure 2. The basis members 101, 102 both weigh approximately 22,000 kilos and can be transported in their entirety on a truck from the factory to the mast building site.

[0040] Although during manufacturing and transport the similar basis members 101, 102 have considerable advantages, calculations showed that a considerably larger and heavier first basis member 101 and a smaller, lighter second basis member 102 in placed condition effect a more advantageous distribution of forces of the mast 6 over the mast base 103.

[0041] As shown in figure 1 the phone mast 6 comprises three feet 65-67 that mutually are positioned in the vertices of a notional equilateral triangle, corresponding with the equilateral triangular set-up of the attachment points 34-36. In this example the distance between the feet 65-67 is 230 centimetres. The phone mast 6 is provided with three almost vertical uprights 61-63 that extend upward from the three feet 65-67 over a height of in this example fifty metres. The vertical uprights 61-63 are mutually connected by a truss 64. In the top that is not shown, the phone mast 6 is provided with transmission and reception equipment for transmitting and receiving mobile telephone and data signals.

[0042] In an alternative embodiment the phone mast is of the "hollow tube mast" type having a base size of 300 centimetres. The basis members 1, 2 can be provided with several sets of attachment points, in order to be able to easily mount different mast types of different base sizes on the mast base 3.

[0043] Figures 2-5 show the method for realising the placed mast base 3 that serves to support the mast 6 in figure 1.

[0044] In figure 2 the situation is shown in which the first basis member 1 and the second basis member 2 have for instance been delivered by a truck at the mast building site. The mast building site has been subjected to a soil probing, after which a substantially square building pit 40 has been excavated in the subgrade having a volume of amply 29 cubic metres, a length and width A of 700 centimetres and a depth B of 60 centimetres. Subsequently five piles or tubular poles 41-45 have been introduced into the building pit 40. The positions of the piles 41-45 have been measured accurately in order to correspond with the mutual positions of the positioning channels 51-55 in the first basis member 1 and the second basis member 2. At the side extending above the bottom of the building pit 40 the piles 41-45 have been partially pulverised in order to expose the reinforcements present in the piles 41-45.

[0045] In figure 3 the situation is shown after the first basis member 1 has for instance been placed in the building pit 40 by a crane. The first pile 41, the second pile 42 and the third pile 43, which in figure 3 are hidden from view by the first basis member 1, support the first basis member 1 in the first positioning channel 51, the second positioning channel 52 and the third positioning channel 53, respectively. The exposed reinforcements of the piles 41-43 extend through a part of the respective positioning channels 51-53. The first basis member 1 is strategically defined by this three-point support and therefore sits stable in the building pit 40.

[0046] Figure 4 shows the situation after the second basis member 2 has been placed in the building pit 40 by the crane. The fourth pile 44 and the fifth pile 45, which in figure 4 are hidden from view by the second basis member 2, support the second basis member 2 in the fourth positioning channel 54 and the fifth positioning channel 55, respectively. The exposed reinforcements of the piles 44 and 45 extend through a part of the respective positioning channels 54 and 55.

[0047] At the location of the third support element 21 and the fourth support element 22, the second basis member 2 is placed in partial overlap of in this example 27 centimetres with the first support element 11 and the second support element 12 of the first basis element 1. The third support surface 25 of the third support element 21 is brought into abutting contact with the first support surface 15 of the first support element 11. The fourth support surface 28 of the fourth support element 22 is brought into abutting contact with the second support surface 18 of the second support element 12. At the location of the first support surface 15 and the second support surface 18, the statically defined first basis member 1 thus bears the second basis member 2, in order for by means of a four-point support the second basis member 2.

[0048] The positioning channels 51-55 are filled with a same fluid, hardening concrete mass, in order to secure the exposed reinforcements of the piles 41-45, which in figure 4 are hidden from view, within the positioning channels 51-55.

[0049] In the placed condition, described above, of the first basis member 1 and the second basis member 2 the basis members 1 and 2 overlap each other over a distance transverse to the longitudinal direction of 27 centimetres. The basis members 1, 2 thus jointly form a substantially square outer contour having a length and width F of 600 centimetres, which at the one side corresponds with the length of the basis members C of the basis members 1, 2 of 600 centimetres, and at the other side corresponds with the sum of the width D of the first basis member 1 and the width G of the second basis member 2, minus the overlap of 27 centimetres at the location of the support.

[0050] The positions of the supporting piles 41-45, which in figure 4 are hidden from view, are chosen such that the outer contour with length and width F falls within the length and width A of the building pit 40. Preferably there is a circumferential space of 0.5 metres around the assembly of the first basis member 1 and the second basis member 2 during construction.

[0051] The first recess 31 in the first basis member 1 and the second recess 32 in the second basis member 2 in the placed condition as shown in figure 4 in this example jointly bound a pouring strip or pouring volume 30 of approximately 2.4 cubic metres. At the lower side the pouring volume 30 is bounded by the bottom of the building pit 40. The reinforcements 33, 37 extending in the recesses 31, 32 extend from both basis members 1, 2 through the pouring volume 30. Preferably the first basis member 1 and the second basis member 2 are brought in mutual overlap, such that the first abutment surface 14, the second abutment surface 16, the third abutment surface 17 and the fourth abutment surface 19 are brought in abutting contact with the sixth abutment surface 26, the fifth abutment surface 24, the eighth abutment surface 29 and the seventh abutment surface 27, respectively. The pouring volume 30 is in that case circumferential and because of the bottom of the building pit 40 substantially sealingly bounded by the first basis member 1 and the second basis member 2.

[0052] Figure 5 shows the situation in which in situ from a supply hose 56 a quick-setting, fluid concrete mass 57 is poured into the pouring volume 30 that is bounded by the first basis member 1 and the second basis member 2. The fluid concrete mass 57 poured in situ in the pouring volume 30 forms a hardening connection, poured stitch or wet knot between the first basis member 1, the second basis member 2 and their reinforcements 33, 37.

[0053] In figure 1 the situation is shown in which the in situ poured concrete mass 57 in the pouring volume between the first basis member 1 and the second basis member 2 has hardened after a few days. The hardened concrete mass 57 poured in situ in this example has a concrete quality indicated by concrete strength class C28/35 in which the characteristic cylinder compressive strength is 28 MPa and the characteristic cube compressive strength is 35 MPa. The prefab manufactured basis members 1, 2 in this example have a concrete quality indicated by concrete strength class C35/45 in which the characteristic cylinder compressive strength is 35 MPa and the characteristic cube compressive strength is 45 MPa. The first basis member 1, the second basis member 2 and the in situ poured and hardened concrete mass 57 situated in between them jointly form the mast base 3. The phone mast 6 with the mast feet 65-67 is placed on the attachment points 34-36 of the first basis member 1 and the second basis member 2. With respect to the other mast feet 65, 67 at least one of the mast feet 66 is situated at the other side of the in situ poured and hardened concrete mass 57, as a result of which the in situ poured and hardened concrete mass 57 extends in between the mast feet 65-67. The centre line S of the phone mast passes through the in situ poured and hardened concrete mass 57.

[0054] The mast base 3 is attached to the piles 41-45 that are hidden from view in figure 1. The piles 41-45 absorb tensile and compressive forces of the mast base 3 and the phone mast 6 placed on the mast base 3, for instance a compressive force as a result of the joint weight of the phone mast 6 and the mast base 3 or a tensile force as a result of sideward wind force on the phone mast 6.

[0055] The above description is included to illustrate the operation of preferred embodiments of the invention and not to limit the scope of the invention. Starting from the above explanation many variations that fall within the spirit and scope of the present invention will be evident to an expert.

Claims

1. Mast base for supporting a mast, particularly a truss mast for reception and transmission of signals, comprising a first basis member and a second basis member which in the placed condition are mutually connected, wherein the first basis member at its side which faces the second basis member is provided with a first recess bounding a pouring space between the first basis member and the second basis member, wherein the first basis member and the second basis member are connected to each other by an in situ hardened concrete mass that is disposed in the pouring space between the first basis member and the second basis member, wherein the mast is placed on the first basis member and the second basis member outside of the in situ hardened concrete mass.

2. Mast base according to claim 1, wherein the second basis member at its side which faces the first basis member is provided with a second recess situated opposite the first recess, which second recess together with the first recess bounds the pouring space between the first basis member and the second basis member.

3. Mast base according to claim 1 or 2, wherein the pouring space is bounded at the lower side by the subgrade on which the first basis member and the second basis member are placed.

4. Mast base according to any one of the preceding claims, wherein the pouring space is situated centrally in the mast base.

5. Mast base according to any one of the preceding claims, wherein the first basis member is larger than the second basis member.

6. Mast base according to any one of the preceding claims, wherein the first basis member and the second basis member at the sides facing each other are provided with reinforcements extending from the basis members into the pouring space.

7. Mast base according to any one of the preceding claims, wherein the first basis member and the second basis member partially overlap each other in vertical direction, wherein preferably at the location of the overlap the first basis member is provided with a stepped support edge on which the second basis member rests in the placed condition.

8. Mast base according to any one of the preceding claims, wherein the mast is provided with several legs that have been arranged in a distributed manner over the mast base on the first basis member and the second basis member, wherein the connection of the in situ hardened concrete mass extends in between the legs.

9. Mast base according to any one of the preceding claims, wherein the mast is provided with a vertical centre line, wherein the vertical centre line of the mast extends through the connection of the in situ hardened concrete mass.

10. Mast base according to any one of the preceding claims, wherein the mast building site is provided with several support piles disposed in a subgrade with which the first basis member and the second basis member are connected in the placed condition, wherein preferably the first basis member and the second basis member are provided with positioning channels, wherein the support piles are provided with reinforcements extending in the positioning channels, wherein the reinforcements of the support piles are connected to the first basis member and the second basis member, respectively, by a hardened concrete mass poured in situ.

11. Method for manufacturing a mast base for supporting a mast, particularly a truss mast for reception and transmission of signals, wherein the mast base is provided with a first basis member and a second basis member which in the placed condition are mutually connected, wherein the first basis member at its side which faces the second basis member is provided with a first recess which between the first basis member and the second basis member bounds a pouring space, wherein the first basis member and the second basis member are connected to each other by an in situ hardened concrete mass disposed in the pouring space between the first basis member and the second basis member, wherein the method comprises transporting the first basis member and the second basis member to the mast building site, placing the first basis member on the subgrade of the mast building site, placing the second basis member in abutting contact with the first basis member at the mast building site, in situ filling the pouring space that is bounded between the first basis member and the second basis member with a fluid, hardening concrete mass, leaving the fluid, hardening concrete mass to harden in situ in order for the in situ hardened concrete mass to form a connection between the first basis member and the second basis member, and placing the mast on the first basis member and the second basis member of the mast base outside of the in situ hardened concrete mass.

12. Method according to claim 11, wherein the first basis member is provided with a stepped support edge, wherein the method comprises at the location of the support edge placing the first basis member and the second basis member in mutual overlap, leaving the second basis member to rest on the first basis member.

13. Method according to claim 11 or 12, wherein the mast is provided with several legs, wherein the method comprises arranging the legs of the mast in a distributed manner over the mast base on the first basis member and the second basis member, wherein at least a part of the in situ hardened concrete mass is situated underneath the mast in between the legs.

14. Method according to any one of the claims 11-13, wherein the method comprises disposing support piles in the subgrade of the mast building site, leaving the basis members placed on the mast building site to rest on the support piles, and connecting the support piles to the basis members, wherein preferably the first basis member and the second basis member are provided with positioning channels, wherein the support piles are provided with reinforcements extending in the positioning channels, wherein the method comprises pouring a hardened concrete mass poured in situ in the positioning channels in order to connect the reinforcements of the support piles to the first basis member and the second basis member, respectively.

15. Method according to any one of the claims 11-14, wherein the method comprises excavating a building pit in the subgrade of the mast building site wherein the building pit has a depth that substantially equals the height of the basis members, and placing the basis members in the building pit, wherein the basis members are situated substantially below the surrounding ground level.

Drawing