摘要 |
An improved grout impregnation method which uses an injection tube for contacting and mixing different kinds of materials supplied thereinto separately to prepare a grout and impregnates the grout into the earth through an injecting opening provided at a tip end of the tube. In this method, a first pressure-holding valve is provided within a higher-pressure path for one of the materials which is supplied under a higher pressure, a mixing section is provided downstream the first pressure-holding valve but in the vicinity thereof for contacting and mixing said one of the materials with another one which is supplied under a lower pressure, and a second pressure-holding valve is provided downstream the mixing section; said one of the materials is passed through the first pressure-holding valve, which reduces the pressure of said one of the materials, and then contacted and mixed with said another one at the mixing section; the contacting and mixing is carried out under a pressure exceeding an atmospheric pressure and determined by the second pressure-holding valve; and the grout resulting from the contacting and mixing and passing through the second pressure-holding valve is impregnated into the earth through the injection opening.
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申请人 |
NITTO CHEMICAL INDUSTRY CO., LTD.;NIHON SOIL ENGINEERING CO., LTD.;YAMAGUCHI KIKAI KOGYO CO., LTD.;NIHON SOGO-BOSUI CO., LTD. |
发明人 |
TAZAWA, SHUNSUKE;TAKEUCHI, KENJI;HORIBA, AKIYOSHI;ISHIDA, MITSUJI;KASHIMA, SYOUICHI;MURATA, MINEO |