发明名称 |
INSTALLATION OF SAND DRAINS |
摘要 |
Methods and equipment for installing sand drains in water bearing earth; and an open ended tubular shell is lowered into the earth while allowing the water bearing earth to freely enter into the interior of the shell; a close fitting auger is used to remove the water bearing earth from the shell and then the shell is filled with sand and subsequently withdrawn from the earth thus leaving the sand to provide the desired sand drain.
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申请公布号 |
US3690388(A) |
申请公布日期 |
1972.09.12 |
申请号 |
USD3690388 |
申请日期 |
1970.07.20 |
申请人 |
RAYMOND INTERN. INC. |
发明人 |
JOSEPH LAWRENCE HILTON;CHARLES RUSSELL GRAFF;LEWIS FRED CAVIN |
分类号 |
E02D3/10;(IPC1-7):E21B11/00;E02D17/14 |
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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