Title:
SHAFT CONSTRUCTION METHOD
Document Type and Number:
Japanese Patent JP3164289
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To efficiently and safely construct a shaft even in a narrow work space by providing upper and lower stage rings on the outside of a PC well, arranging a power jack whose upper stage ring ascends and descends to the lower stage ring, and pressfitting the PC well in order in a measuring worm shape in an excavating pit.
SOLUTION: When a shaft is constructed by combining a spur RD construction method and a side wall construction method (a PC well construction method) with each other, a rotary excavator 1 inserts/supports a bit 5 into/by a notch formed on an inner peripheral surface of a PC well 12. An upper stage ring 7 and a lower stage ring 8 are provided on the outside of the PC well 12, and a bit 9 of the upper stage ring 7 is inserted into a notch hole of an upper stage or a lower stage formed on an outer peripheral surface of the PC well 12, and a power jack 6 raises and lowers the upper stage ring 7 to the lower stage ring 8. The PC well 12 is pressfitted in order in a measuring work shape in an excavating pit H precedently excavated by the rotary excavator 1 by using the upper stage ring 7 and the lower stage ring 8, and the shaft is constructed.
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Inventors:
Ueda Masaaki
Shimai Moriyuki
Takeuchi Satoshi
Shimai Moriyuki
Takeuchi Satoshi
Application Number:
JP25818196A
Publication Date:
May 08, 2001
Filing Date:
September 30, 1996
Export Citation:
Assignee:
Kashima Construction Co., Ltd.
International Classes:
E21D1/06; E21B7/28; (IPC1-7): E21D1/06; E21B7/28
Domestic Patent References:
| JP7331978A |
Attorney, Agent or Firm:
Toshitada Takahashi (1 outside)