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(11) | EP 1 127 193 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
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| (54) |
METHOD FOR STABILIZING THE GROUND AND APPARATUS FOR APPLYING THE METHOD METHODE ZUR BODENSTABILISIERUNG UND VORRICHTUNG ZU DEREN AUSFÜHRUNG PROCEDE DE STABILISATION DE SOL ET APPAREIL PERMETTANT DE METTRE EN OEUVRE LEDIT PROCEDE |
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| Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
[0001] The present invention relates to a method for stabilizing a ground, by which dry materials contained in at least two different tanks are mixed together in the desired proportions and transferred to the ground. Furthermore, the present invention relates to a system for stabilizing the ground, which comprises tanks for dry materials, which are to be mixed, and apparatuses for mixing the materials and for transferring them to the desired place.
[0002] Soft ground is an obstacle to the effective use of large areas of land. There are currently existing methods and systems, which can stabilize the soft material in the soil, and the land area can in this way be made useful. Vertical pillars, or corresponding supports, which are produced by mixing materials, which are known to be stabilizing materials into the soil, can be formed in the ground. Mixing the substance into the ground and the stabilization of the ground transpires, for example, by drilling a special boring implement into the ground, which disperses the stabilizing substance into the soil when it is turned, and at the same time mixes it into the soil materials.
[0003] In dry deep mixing a dry substance, which is made from at least two raw materials, is generally used as a stabilizing substance. At present, the raw materials are mixed together, for example, in a factory and are transported to the work grounds as a prepared mixture in a separate tank. The substance is transferred from this tank to the ground as needed using a work implement. The problem is that, at present, the information about and the control of the quantities of raw materials and the proportions in which they are mixed is not accurate. Different soils react differently to different binding agents, both qualitatively and quantitatively, so that they could be altered according to the circumstances. The current problem is that the proportions of the materials contained in the substance in the tank cannot be modified in a simple way after they have been mixed together.
[0004] In documents DE-A-4013801 and EP-A-0482720 has been presented methods and devices for dosing and mixing raw materials. However when mixing raw materials there is always water used and so these documents describe wet mixing methods.
[0005] The object of the present invention is to provide a method for stabilizing the ground, by which the disadvantages associated with the present method will be eliminated. In particular, the object of the invention is to provide a method, which uses one system to both mix together different raw materials in the desired proportions and to transfer them to the desired place. Furthermore, the object of the invention is to provide a system, which is advantageous in its cost, and simple and functional in its structure.
[0006] The objective of the invention is accomplished with a method and a system, the characteristics of which are set forth in the claims.
[0007] In a method formed in accordance with the invention, dry raw materials are transferred from at least two tanks by compressed air produced in compressors, the dry raw materials are mixed together in a transferring pipe and the mixed substance is immediately transferred to the desired place by a feeding apparatus after it has been mixed. The method does not require the use of separate storage tanks, nor does the prepared mixed substance need to be transported, so that the method is more economically advantageous than the current method. Furthermore, the proportions of the raw materials in the mixture can reliably be maintained as desired, or they can be easily and simply altered according to specific circumstances.
[0008] To the system in accordance with the invention includes compressors for producing compressed air, which are connected to the pipes leading from the tanks, a transferring pipe is also a mixing apparatus for the raw materials, in which the raw materials are arranged to be transferred from their tanks in the desired proportions, and said mixing apparatus is connected to the feeding apparatus for the mixed substance. The system does not require a tank for the mixed substance; rather the system only has different tanks for the different stabilizing raw materials. A structure formed in accordance with the invention is simple, advantageous and functional.
[0009] In a certain advantageous application of the invention, a compressor unit has been arranged to every raw material tank of the system for transferring the raw material. The compressed air produced in the compressors enables the control of the transference of raw materials in the desired proportions from the tanks to the mixing apparatus and to the feeding apparatus.
[0010] In an advantageous application of the invention, the system comprises tanks, a transfer apparatus for the raw materials, a feeding apparatus and compressor units, all of which are arranged to a mobile carriage. Thus, the entire system can be transported to the desired place in the vicinity of the boring implement.
[0011] In the following advantageous application of the invention, the system comprises transducers, arranged on or near the tanks, for measuring the quantity of raw material, which comes from the tanks. The transducers enable the flow of raw materials coming from the tanks to be monitored accurately and the desired proportions can be maintained in the mixture, and/or changed to the desired proportion. The invention will now be described in more detail with reference to the accompanying drawing, in which
Figure 1 illustrates a certain system formed in accordance with the invention, as viewed from the side,
Figure 2 illustrates a system formed in accordance with Figure 1, as viewed from the top,
Figure 3 illustrates a system formed in accordance with Figure 1, as viewed from the other end.
[0012] A system formed in accordance with the figures comprises tanks 1, 2, arranged to a mobile carriage 6, compressor units 5 located in the vicinity of the tanks, and apparatuses 3, 4 for mixing the raw materials and for transferring the mixed substance to the desired place. The number of tanks can vary in different applications of the invention, such that every stabilizing raw material has its own tank. Every tank has its own compressor unit 5. The pipes leading from the tanks function as the transferring apparatus 3, and the compressors are then connected to the pipes. These pipes are joined into one pipe by the pipe fitting 7 at the other end of the system, the one pipe being connected to the feeding apparatus 4. Thus, the flows of the raw materials coming from different pipes are mixed together, and the mixed substance is transferred to the feeding apparatus 4 and through it to the desired place. The feeding apparatus in the application according to Figure 1 is a conventional boom-like feeding apparatus. The system additionally comprises transducers (not illustrated in the figures), known per se, for measuring the raw materials coming from the tanks, and which are mounted to the tanks or in their vicinity.
[0013] In an application of a method formed in accordance with the invention, the raw materials in at least two different tanks 1, 2 are mixed together in the desired proportions in a pipe 3 which also functions as a transferring apparatus, and the mixed substance is led directly thereafter to the desired place with the help of the feeding apparatus 4, for example, with a boring implement into the ground. In the method, two or more different raw materials are mixed together in a controlled way and transferred to the desired place by compressed air. The transducers enable the quantity and proportion of the raw materials flowing into the mixture to be monitored. The proportions in the mixture can easily be regulated by changing the quantity of one or more of the raw materials. The system is controlled hydraulically and it functions by remote control, for example by radio control.
1. A method for stabilizing a ground, wherein dry raw materials in at least two different
tanks (1, 2) are mixed together in desired proportions and led into the ground, characterized in that the dry raw materials are transferred from the tanks by compressed air produced in
compressors, the dry raw materials are mixed together in a transferring pipe (7) and
led immediately after they have been mixed to the desired place by feeding apparatus
(4).
2. A system for stabilizing the ground, which comprises at least two tanks (1,2) for
dry raw materials which are to be mixed and apparatuses (3, 4, 5) for mixing dry raw
materials and for leading the substance to the desired place, characterized in that the system includes compressors (5) for producing compressed air, which are connected
to transferring pipes (3) leading from the tanks (1, 2), and in a that the transferring
pipes (3, 7) for the raw materials are mixing apparatuses in which the raw materials
are arranged to be transferred in the desired proportions from the tanks, and in that said mixing apparatuses (3) are connected to the feeding apparatus (4) for the mixed
substance such as to lead the mixed raw materials to the desired place.
3. A system for stabilizing the ground formed in accordance with claim 2, characterized in that, each individual tank (2) and raw material has its own compressor unit (5) connected
to the tank for transferring the raw material.
4. A system for stabilizing the ground formed in accordance with claims 2 or 3, characterized in that, the tanks (2), the raw material transferring apparatus (3), the feeding apparatus
(4) and the compressor units (5) of the system are all mounted on a mobile carriage
(6).
5. A system for stabilizing the ground formed in accordance with one of the claims 2-4, characterized in that, the system comprises transducers for measuring the raw materials coming from the
tanks, and said transducers are mounted to the tanks, or in the vicinity of the tanks.
1. Verfahren zum Stabilisieren eines Untergrundes, wobei trockene Rohstoffe in wenigstens
zwei verschiedenen Tanks (1, 2) in gewünschten Anteilen miteinander vermengt werden
und in den Untergrund eingebracht werden, dadurch gekennzeichnet, dass die trockenen Rohstoffe mit Hilfe von in Kompressoren erzeugter Druckluft aus den
Tanks befördert werden, wobei die trockenen Rohstoffe in einem Transportrohr (7) miteinander
vermengt werden und sofort nach ihrem Vermengen mit Hilfe einer Zufuhrvorrichtung
(4) an die gewünschte Stelle verbracht werden.
2. System zum Stabilisieren des Untergrundes, das wenigstens zwei Tanks (1, 2) für trockene
Rohstoffe, die miteinander vermengt werden sollen, und Vorrichtungen (3, 4, 5) zum
Vermengen von trockenen Rohstoffen und zum Verbringen der Substanz an die gewünschte
Stelle umfasst, dadurch gekennzeichnet, dass das System Kompressoren (5) zum Erzeugen von Druckluft enthält, die mit Transportrohren
(3) verbunden sind, welche von den Tanks (1, 2) abgehen, und dadurch gekennzeichnet, dass es sich bei den Transportrohren (3, 7) für die Rohstoffe um Mischvorrichtungen handelt,
in denen die Rohstoffe platziert werden, um in den gewünschten Anteilen aus den Tanks
abtransportiert zu werden, und dadurch gekennzeichnet, dass die Mischvorrichtungen (3) mit der Zufuhrvorrichtung (4) für die vermengte Substanz
dergestalt verbunden sind, dass die vermengten Rohstoffe an die gewünschte Stelle
verbracht werden.
3. System zum Stabilisieren des Untergrundes, wobei das System wie in Anspruch 2 beschrieben
aufgebaut ist, dadurch gekennzeichnet, dass jeder einzelne Tank (2) und der Rohstoff seine eigene Kompressoreinheit (5) aufweist,
die mit dem Tank verbunden ist, um den Rohstoff zu transportieren.
4. System zum Stabilisieren des Untergrundes, wobei das System wie in Anspruch 2 oder
Anspruch 3 beschrieben aufgebaut ist, dadurch gekennzeichnet, dass die Tanks (2), die Rohstofftransportvorrichtung (3), die Zufuhrvorrichtung (5) und
die Kompressoreinheiten (5) des Systems allesamt auf einem mobilen Fahrgestell (6)
montiert sind.
5. System zum Stabilisieren des Untergrundes, wobei das System wie in einem der Ansprüche
2-4 beschrieben aufgebaut ist, dadurch gekennzeichnet, dass das System Messwertwandler zum Messen der von den Tanks kommenden Rohstoffe umfasst
und die Messwertwandler an den Tanks oder in der Nähe der Tanks angebracht sind.
1. Procédé de stabilisation d'un sol, dans lequel des matières premières sèches d'au
moins deux citernes différentes (1, 2) sont mélangées ensemble en proportions désirées
et dirigées dans le sol, caractérisé en ce que les matières premières sèches sont transférées des citernes au moyen d'air comprimé
produit dans des compresseurs, les matières premières sèches sont mélangées ensemble
dans une conduite de transfert (7) et dirigées juste après avoir été mélangées vers
l'emplacement désiré par un appareil d'alimentation (4).
2. Système de stabilisation du sol, qui comprend au moins deux citernes (1, 2) pour des
matières premières sèches à mélanger et des appareils (3, 4, 5) pour mélanger les
matières premières sèches et pour diriger la substance vers l'emplacement désiré,
caractérisé en ce que le système comprend des compresseurs (5) pour produire de l'air comprimé, qui sont
connectés à des conduites de transfert (3) partant des citernes (1, 2) et en ce que les conduites de transfert (3, 7) pour les matières premières sèches sont des appareils
de mélange dans lesquels les matières premières sèches sont placées pour être transférées
en proportions désirées depuis les citernes et en ce que lesdits appareils de mélange (3) sont connectés à l'appareil d'alimentation (4) pour
la substance mélangée de manière à diriger les matières premières sèches vers l'emplacement
désiré.
3. Système de stabilisation du sol conformé selon la revendication 2, caractérisé en ce que chaque citerne individuelle (2) et chaque matière première a sa propre unité de compresseur
(5) connectée à la citerne pour transférer la matière première.
4. Système de stabilisation du sol conformé selon la revendication 2 ou 3, caractérisé en ce que les citernes (2), l'appareil de transfert de matière première (3), l'appareil d'alimentation
(4) et les unités de compresseur (5) du système sont tous montés sur un chariot mobile
(6).
5. Système de stabilisation du sol conformé selon une des revendications 2 à 4, caractérisé en ce que le système comprend des transducteurs pour mesurer les matières premières venant
des citernes et que lesdits transducteurs sont montés sur les citernes ou à proximité
des citernes.