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砂固结内锚头预应为锚杆的锚固力是由砂体与锚孔壁之间的摩擦力提供的，设计的室内试验测出了摩擦力的分布曲线，基于本试验成果对目前的砂土强度特性理论提出了一些看法。
The anchorage force of anchor pre-anchored in the sand consolidation is provided by the friction between the sand body and the anchor hole wall. The designed indoor test measured the distribution curve of the friction force. Based on the results of this test, Sand strength characteristics of the theory made some observations.