(19)
(11) EP 0 874 088 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
31.03.1999 Bulletin 1999/13

(43) Date of publication A2:
28.10.1998 Bulletin 1998/44

(21) Application number: 98107467.7

(22) Date of filing: 23.04.1998
(51) International Patent Classification (IPC)6: E02D 29/12, E03F 5/02, E02D 7/28
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 23.04.1997 JP 106413/97

(71) Applicant: Copros Co., Ltd.
Shimonoseki-shi, Yamaguchi-ken (JP)

(72) Inventors:
  • Miyazaki, Mamoru
    Shimonoseki-shi, Yamaguchi-ken (JP)
  • Miyazaki, Kaoru
    Shimonoseki-shi, Yamaguchi-ken (JP)

(74) Representative: von Samson-Himmelstjerna, Friedrich R., Dipl.-Phys. et al
SAMSON & PARTNER Widenmayerstrasse 5
80538 München
80538 München (DE)

   


(54) Method of constructing a shaft and an apparatus for constructing a shaft


(57) A high strength shaft, by which wasteful consumption of casing material is reduced, is constructed. After an excavation casing (1) is pressed and driven into the ground and earth inside the driven excavation casing (1) is discharged, an earth-retaining casing (2) is inserted into the excavation casing (1) and a concrete bottom plate (7) is cast in the earth-retaining casing (2), and thereafter, the excavation casing (1) is removed from the ground while a hardening agent (8) is poured into the space between the excavation casing (1) and the earth-retaining casing (2) so that a shaft is constructed.






Search report