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Title:
OUTER WATER SEAL FOR VERTICAL JACKING
Document Type and Number:
WIPO Patent Application WO/2019/105110
Kind Code:
A1
Abstract:
Provided is an outer water seal for vertical jacking, wherein, a sealing ring (2) and an oil immersed asbestos packing (3) are in connected with a grease hole (9) provided on a jacking pipe, the jacking pipe is further provided with a polyurethane hole (10) connected with the gap between the outer water seal barrier (4) and the jacking pipe, in the initial stage of vertical jacking, the jacking pipe cover (1) is provided with a mud discharging valve (7), the soil body above the vertical jacking pipe is broken, and the frontal jacking force is reduced by opening the mud discharging valve (7); in the vertical jacking process, the grease hole (9) is pressed in the shield tail grease, and into the sealing ring (2) and the oil immersed asbestos packing (3) to reduce the abrasion of the sealing ring (2) and the oil immersed asbestos packing (3). When the water seepage amount is large, the polyurethane hole (10) is pressed in the aqueous polyurethane, and into the gap between the outer water seal barrier (4) and the jacking pipe for forcibly sealing the water. The device can solve the problem of water leakage, difficulty in maintenance and excessive initial jacking force of the wall pipe water seal under high water pressure in the process of jacking, so that the vertical jacking construction technology can be further promoted in the high head and complex geological conditions.

Inventors:
SHI, Yu (Room 203, Design Institute No.231 Minxing Road, Yangpu District, Shanghai 2, 200002, CN)
WANG, Tao (Room 203, Design Institute No.231 Minxing Road, Yangpu District, Shanghai 2, 200002, CN)
CHEN, Yongfei (Room 203, Design Institute No.231 Minxing Road, Yangpu District, Shanghai 2, 200002, CN)
XU, Yuxia (Room 203, Design Institute No.231 Minxing Road, Yangpu District, Shanghai 2, 200002, CN)
LUO, Yunfeng (Room 203, Design Institute No.231 Minxing Road, Yangpu District, Shanghai 2, 200002, CN)
ZOU, Feng (Room 203, Design Institute No.231 Minxing Road, Yangpu District, Shanghai 2, 200002, CN)
CHEN, Min (Room 203, Design Institute No.231 Minxing Road, Yangpu District, Shanghai 2, 200002, CN)
QU, Yanzhong (Room 203, Design Institute No.231 Minxing Road, Yangpu District, Shanghai 2, 200002, CN)
Application Number:
CN2018/106359
Publication Date:
June 06, 2019
Filing Date:
September 19, 2018
Export Citation:
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Assignee:
SHANGHAI FOUNDATION ENGINEERING GROUP CO., LTD. (QIAN Danfeng, Room 203 Design Institute, No.231 Minxing Road, Yangpu District, Shanghai 2, 200002, CN)
International Classes:
E03F3/06
Foreign References:
CN107975127A2018-05-01
CN106402505A2017-02-15
CN103161956A2013-06-19
CN204984425U2016-01-20
CN104265332A2015-01-07
KR200164510Y12000-01-15
Attorney, Agent or Firm:
SHANGHAI SHENHUI PATENT AGENT CO., LTD. (Room 405, Building D No.80 Caobao Road, Xuhui District, Shanghai 5, 200235, CN)
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