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1. 发明专利

JPH05311637A 失效
公开(公告)号：JPH05311637A
公开(公告)日：1993-11-22
申请号：JP12147892
申请日：1992-05-14
申请人： KANDEN KOGYO KK
发明人： NUMA ICHIRO , TANI KEISUKE , IENAGA YOSHITSUGU
IPC分类号： E02D3/12
摘要： PURPOSE:To prevent the infiltration of a chemical into underground conduits when the chemical is injected near multiple underground conduits communicating one manhole with the other manhole arranged separately to prevent the settlement of the ground or improve the soil property. CONSTITUTION:In the preventing method of the infiltration of a chemical into underground conduits when the chemical is injected near multiple underground conduits 3, 4, 5 communicating one manhole 1 with the other manhole 2 arranged separately to prevent the settlement of the ground or improve the soil property, a pump 7 is stored in one manhole 1, and the conduit end of a specific conduit is communicated with the pump 7 via a water feed hose. The conduit end on the other manhole 2 side of this conduit is communicated with the conduit end of another conduit in the other manhole 2 via a back flow pipe. When the chemical is injected, water is fed into the conduit from the pump 7 to be circulated in multiple conduits, and the infiltration of the chemical into the conduits from connection portions of the conduits or crack, positions of the conduits is prevented.

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