发明名称 |
PUMPING DEVICE, SOFT GROUND IMPROVEMENT METHOD, GROUND EXCAVATION METHOD, CONTAMINATED SOIL PURIFICATION METHOD AND RECHARGE METHOD |
摘要 |
<P>PROBLEM TO BE SOLVED: To stabilize inflow of ground water into a well pipe and to increase an inflow rate. <P>SOLUTION: A pumping device comprises: a well pipe 3; a closing lid; a decompression pump; a lifting pump 6; and a pump storage section 7. The well pipe 3 having a strainer 8 at a lower section is buried in the ground. The closing lid closes an internal space of the well pipe 3 in airtight state. The decompression pump reduces pressure in the internal space of the well pipe 3 through a suction pipe. The pump storage section 7 has: a cylindrically formed side wall member 22 where a position thereof is determined so that an upper edge thereof is higher than a groundwater inlet section 8c of the strainer 8; and a bottom member 21 which forms a bottom of the pump storage section 7. The lifting pump 6 has a suction port at a position lower than the height of the upper edge 22a of the side wall member 22 in the pump storage section 7. <P>COPYRIGHT: (C)2012,JPO&INPIT |
申请公布号 |
JP2011256670(A) |
申请公布日期 |
2011.12.22 |
申请号 |
JP20100134210 |
申请日期 |
2010.06.11 |
申请人 |
OHBAYASHI CORP |
发明人 |
YAMAMOTO AKIRA;YAMADA YUKI;NISHIDA KENJI;SATO YUJI;ISHIDA MICHIHIKO;ISHIKAWA YOJI |
分类号 |
E02D3/10;B09C1/02;B09C1/08;C02F1/00;E02D17/04 |
主分类号 |
E02D3/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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