| 杨建伟,肖欣,李文彬,片磊,贾超.偏桥子岩土复合滑坡发生机理和抗剪强度反分析[J].矿产勘查,2025,16(9):2192-2201 |
| 偏桥子岩土复合滑坡发生机理和抗剪强度反分析 |
| Mechanism and back analysis of shearing strength for rock-soil composite landslide in Pianqiaozi Village |
| 投稿时间：2023-05-27 |
| DOI：10.20008/j.kckc.202509014 |
| 中文关键词: 滑坡 反分析 敏感度 动态环剪试验 抗剪强度 |
| 英文关键词: landslide back analysis sensitivity ring shear test shearing strength |
| 基金项目:本文受天津市规划和自然资源局基金项目(ML2019-HP-F162(2))资助。 |
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| 中文摘要: |
| 岩土复合滑坡是滑坡中一种典型的类型，其滑坡机制比较复杂，研究深度存在一定的不足，尤其滑带土抗剪强度的准确确定是关键，用反分析法确定岩土体抗剪强度是一种行之有效的方法。但是影响滑坡稳定性的不同物理力学参数的敏感性不同，仍存在一定的难点，许多工程中反演结果不理想。本文根据偏桥子滑坡勘查成果，查明该滑坡属于岩土复合滑坡，地质条件复杂，进一步分析了滑坡的发生机理；然后取两个主剖面对滑带土抗剪强度参数 C、.值进行敏感性分析，并采用传递系数法对滑带土抗剪强度进行反演分析；最后与动态环剪试验和工程经验相结合综合确定抗剪强度指标。最终应用抗剪强度指标进行滑坡稳定性评价，提出抗滑桩治理方法，滑坡治理后处于稳定状态。本文对岩土复合滑坡的研究和抗剪强度确定具有较高的参考作用。 |
| 英文摘要: |
| Rock-soil composite landslides represent a distinct type of slope failure with complex mechanisms.Current research in this field remain limited, particularly in accurately quantifying the shear strength of the slidingzone. While inverse analysis has proven effective in estimating the shear strength of rock-soil masses, its practicalapplication faces challenges due to the varying sensitivity of slope stability to different physical and mechanical pa-rameters. As a result, inversion outcomes in engineering projects are often unsatisfactory. This study characterizes the Pianqiaozi landslide as a rock-soil composite type with complex geological conditions and investigates its fail-ure mechanism. Sensitivity analysis is conducted on the shear strength parameters C and φ of the sliding zone soilalong two main profiles, followed by shear strength inversion using the transfer coefficient method. The shearstrength index is determined by integrating dynamic ring shear test results with engineering expertise. These strength parameters are then applied to evaluate landslide stability, leading to the proposal of anti-slide piles for re-inforcement. Post-remediation observations confirm that the landslide has stabilized. This study offers a valuablereference for research on rock-soil composite landslides and the assessment of shear strength. |
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