低应变法在滑坡支护结构问题诊断中的应用

Application of Low Strain Method in the Diagnosisof Landslide Supporting Structure

本次研究依托陕西省某铁路段沿线滑坡治理工程,针对已竣工桩板墙支护结构的破坏问题,通过低应变法对其抗滑桩质量进行诊断。首先应用低应变法对桩板墙支护结构的19根抗滑桩桩身完整性进行检测,然后通过钻芯法配合孔内摄像对低应变法的检测结果进行验证,最后根据波速修正后确定的桩身断裂位置推断滑坡滑裂面的位置,并通过地质钻探取样确认。结果表明:低应变法可以检测出抗滑桩的断裂位置,进而准确地推断出滑坡滑裂面位置,对滑坡支护结构破坏后的滑坡二次勘察及治理提供借鉴。

Based on the landslide control project along a railway section in Shanxi province,the quality of anti slide piles is diagnosed by low strain method for the failure of the completed pile sheet wall support structure.The low strain method is used to detect the integrity of the 19 anti slide piles of the pile sheet wall support structure.The detection results of the low strain method are verified by the core drilling method and the camera in the hole.Finally,the location of the landslide sliding surface is inferred according to the pile fracture location determined after wave velocity correction,and confirmed by geological drilling sampling.The results show that the low strain method can detect the fracture position of the anti slide pile,and then accurately infer the position of the landslide sliding surface,which provides reference for the secondary investigation and treatment of the landslide after the failure of the landslide support structure.