Installation of sand drains
    1.
    发明授权

    公开(公告)号:US3707847A

    公开(公告)日:1973-01-02

    申请号:US3707847D

    申请日:1968-02-06

    CPC classification number: E02D3/106

    Abstract: Formation of sand drains in the earth by drilling and forcing a fluid at high velocity to wash out a hole and thereafter filling the hole by forcing filler material down through a pipe; the pipe being outfitted with special valve control means to control the flow of fluid and filler therethrough in generally inverse manner.

    Installation of sand drains
    2.
    发明授权
    Installation of sand drains 失效
    安装沙漏

    公开(公告)号:US3772894A

    公开(公告)日:1973-11-20

    申请号:US3772894D

    申请日:1971-12-08

    CPC classification number: E02D3/106

    Abstract: Formation of sand drains in the earth by drilling and forcing a fluid at high velocity to wash out a hole and thereafter filling the hole by forcing filler material down through a pipe; the pipe being outfitted with special valve control means to control the flow of fluid and filler therethrough in generally inverse manner.

    Abstract translation: 通过高速钻孔和强制流体冲洗一个孔,然后通过管道将填料向下挤压来填充孔,从而形成泥土排水沟; 该管配备有特殊的阀控制装置,以大致相反的方式控制流体和填料的流动。

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