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1. 发明授权

US5256003A Method for automatically driving gravel drain piles and execution apparatus therefor 失效
标题翻译：自动驱动砾石排水桩及其执行装置的方法
公开(公告)号：US5256003A
公开(公告)日：1993-10-26
申请号：US895425
申请日：1992-06-05
申请人： Katsuhiko Ito , Rentaro Ikeda , Tadao Koike , Yutaka Nakajima , Yasuharu Okita , Haruo Ichikawa
发明人： Katsuhiko Ito , Rentaro Ikeda , Tadao Koike , Yutaka Nakajima , Yasuharu Okita , Haruo Ichikawa
IPC分类号： E02D3/10 , E02D3/08
CPC分类号： E02D3/106
摘要： A method comprising interpenetrating a hollow casing into a relatively loose sand layer saturated with ground water, thereafter raising the casing while tamping crushed stones charged into the casing by a compaction rod disposed within the casing, and driving gravel drain piles while continuously performing the raising of the casing and the tamping of the crushed stones. After the casing has reached the predetermined depth and the charging of crushed stones has been confirmed an, amplitude of reaction is detected by a reaction detection device provided on the compaction rod or a load current measuring device of the compaction rod. The reaction value is compared with a set reaction value, and one or more factors (a raising speed of the casing, a period, an amplitude and an extreme end surface-height of the compaction rod for determining a compacting degree of a peripheral ground) are controlled in response to the compared value.
摘要翻译：一种方法，包括将中空壳体相互穿透到用地下水饱和的相对松散的砂层中，然后在通过设置在壳体内的压实杆夯实装入壳体中的破碎石块的同时升高壳体，并且驱动砾石排水桩，同时连续地执行提升套管和捣碎的碎石头。在壳体达到预定深度并且已经确认了粉碎的石头的充电之后，通过设置在压实杆上的反应检测装置或压实杆的负载电流测量装置来检测反应的振幅。将反应值与设定的反应值以及一个或多个因素（用于确定外围地面的压实度的压实棒的壳体的升高速度，周期，振幅和最终表面高度）进行比较，根据比较值进行控制。

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