“r”型测斜曲线滑坡滑动面位置确定方法研究

doi:10.13722/j.cnki.jrme.2022.0518

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摘要在实际的深孔位移监测中，“r”型测斜曲线通常是将最大位移突变点作为滑动面的位置，但这种方法容易受到传感器布置间隔和横纵坐标观测尺度的影响，存在滑动面位置定义不清晰、数值不确定的问题。为能够有效地克服这些缺点，提升测斜曲线滑动面辨识的准确度，基于“r”型测斜曲线变化特征，将滑坡分为滑动体、滑动区间和不动体3个组成部分，提出具有该曲线特征的滑坡体理论概化模型，并对滑坡运动过程中不同深度处土体的位移速率变化特点和规律进行深入分析。研究结果表明，滑动面的形成会导致位移速率在滑动面位置处产生突变，形成2组曲线簇分别对应滑动体和不动体，使得位移速率沿深度方向出现阶跃阶段，这一特点能够准确区分滑动体和不动体的区间范围，为滑动面位置的辨识提供重要依据。进一步地，研究结合真实数据总结归纳阶跃阶段内离散点的分布类型，分别构建相应的数学计算方法，能够更加准确地确定滑动面位置，更好地提升深孔位移监测的可靠度和准确度，具有较大的实用价值。

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	陈浩1
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关键词 ：边坡工程, 滑动面位置, 位移速率, 阶跃阶段, 离散点计算

Abstract：In the actual deep displacement monitoring，the“r”type inclinometer curve usually takes the maximum displacement mutation point as the position of the sliding surface. However，this method is easily affected by the sensor spacing and the observation scale of the coordinates，and there are problems such as unclear definition of the sliding surface position and numerical uncertainty. In order to overcome these shortcomings and improve the accuracy of slip surface identification，this paper divides the landslide into three parts：sliding body，sliding interval and inactive body，and proposes the theoretical generalization model of landslide with the characteristics of the curve based on the characteristics of the“r”type inclinometer curve. This paper analyzes the characteristics and laws of displacement rate of soil at different depths in the process of landslide movement. It is found that the sliding surface will cause the mutation of displacement rate at this position to form two groups of curve clusters which correspond to sliding body and inactive body respectively. The displacement rate has a step stage along the depth direction，which can accurately distinguish the range between the sliding body and the inactive body，and is conducive to identifying the position of the sliding surface. Further，this paper summarizes the distribution types of discrete points in the step stage，and constructs different mathematical calculation methods. This method can accurately determine the position of sliding surface and improve the reliability and accuracy of deep displacement monitoring，which has great practical value.

Key words： slope engineering sliding surface location rate of displacement step stage discrete point calculation

引用本文:

陈浩1，2，吴红刚1. “r”型测斜曲线滑坡滑动面位置确定方法研究[J]. 岩石力学与工程学报, 2023, 42(S1): 3567-3577.
CHEN Hao1，2，WU Honggang1. The method for determining the position of sliding surface of landslide with “r”type inclinometer curve. , 2023, 42(S1): 3567-3577.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.0518 或 http://rockmech.whrsm.ac.cn/CN/Y2023/V42/IS1/3567

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