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1. 发明专利

JPH05287724A 失效
公开(公告)号：JPH05287724A
公开(公告)日：1993-11-02
申请号：JP11245492
申请日：1992-04-06
申请人： TAISEI CORP , SEIWA KIKO KK
发明人： KOKUBU SHIGEO , NAKANO SUMIO , OHARA TAKAHIKO , KAWAI HARUO , OKABE MASATOSHI
IPC分类号： E02D3/00 , E02D3/12
摘要： PURPOSE:To conduct boring work and the impregnation of a grout smoothly by installing a closing sheet having strength not damaged by the pressure of boring water onto the inner circumferential surface of a casing pipe for the grout and covering a discharge opening. CONSTITUTION:In a check valve 4 composed of a discharge opening 34, a valve sheet 41 closing the inside and outside of the discharge opening and a closing sheet 42, the closing sheet 42 has strength, in which the sheet 42 is not damaged at slime discharge pressure and damaged for the first time at grout impregnation pressure higher than the slime discharge pressure at the time of boring. Boring and grout impregnation operation are conducted by using a casing pipe 2 with such a check valve 4. Consequently, the state of the closing of the discharge opening 34 is maintained by the working of the closing sheer 42 at the time of boring, thus preventing an outflow to the bedrock side of slime 5. When grout is impregnated, the closing sheet 42 is broken and the inside of the discharge opening 34 is opened when the pressure of a grout material is increased and made larger than the rupture strength of the closing sheet 142, and the grout material elastically deforms the valve sheet 41 and infiltrates into a bedrock.

2. 发明专利

JPH0726550A CHEMICALS FILLING DEVICE 失效
公开(公告)号：JPH0726550A
公开(公告)日：1995-01-27
申请号：JP19312693
申请日：1993-07-08
申请人： TAISEI CORP , SEIWA KIKO KK
发明人： KOKUBU SHIGEO , NAKANO SUMIO , OKABE MASATOSHI
IPC分类号： E02D3/12
摘要： PURPOSE:To easily pull out a filing tube and a double tube by restoring a packer rubber from externally projected deformation state to original state via the application of tension thereto, end connecting the double tube to a center hole type jack. CONSTITUTION:The root ends of an inner tube 1 and an outer tube 2 are respectively coupled to the cylinder 33 or the rod 31 of a enter type jack 3. Also, packer rubber is connected between members fixed to the inner and outer tubes 1 and 2. The outer tube 2 is pushed with the jack for pulling the inner tube 1, thereby compressing the packer rubber from both ends and causing the rubber to be projected externally from a filling tube. Then, the outer tube 2 is pulled with the jack to push out the inner tube 1, thereby stretching the packer rubber from both ends. As a result, the packer rubber can be easily made to expand and contract.

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