| 基于RFPA3D不同加载方法的边坡渐进破坏分析 |
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| 引用本文： | 康佳辉,刘晓辉,张永彬,向柏宇.基于RFPA3D不同加载方法的边坡渐进破坏分析[J].西华大学学报(自然科学版),2021,40(4):99-107. |
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| 作者姓名： | 康佳辉 刘晓辉 张永彬 向柏宇 |
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| 作者单位： | 1.西华大学流体及动力机械教育部重点试验室，四川 成都 610039 |
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| 基金项目： | 四川省教育厅重点项目资助（18ZA0457）；西华大学重点科研基金资助（Z17113）；西华大学流体及动力机械教育部重点实验室创新基金资助课题（ycjj2018040） |
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| 摘 要： | 以锦屏一级左岸边坡为例，建立简化、含软弱结构面的三维地质模型，采用RFPA3D基于离心加载法（Centrifuge）和强度折减法（SRM）模拟边坡渐进破坏过程，通过再现边坡渐进破坏过程，探讨RFPA3D不同加载方法在边坡稳定性分析中的适用性。模拟结果显示:与FLAC、离散元等有限元数值计算方法相比，RFPA3D模拟的边坡渐进破坏过程更加简单直观高效；渐进破坏过程分析表明，在自然工况下左岸煌斑岩脉X、断层F5、F8、F2是控制边坡整体破坏模式的关键因素，在进行边坡开挖时应予以重点关注。稳定性分析表明，采用Centrifuge法计算得到的边坡安全系数为1.75，比采用SRM法计算得到的安全系数1.52高，且Centrifuge法模拟得到的边坡破坏模式与实际工程勘察结果更为一致；因此，分析边坡破坏模式时，推荐采用RFPA-Centrifuge法。
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| 关 键 词： | RFPA3D 强度折减 离心加载 边坡稳定性 数值模拟 |
| 收稿时间： | 2020-11-17 |
Progressive Failure Analysis of Slope Based on Different Loading RFPA3D Methods |
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| KANG Jiahui,LIU Xiaohui,ZHANG Yongbin,XANG Baiyu.Progressive Failure Analysis of Slope Based on Different Loading RFPA3D Methods[J].Journal of Xihua University:Natural Science Edition,2021,40(4):99-107. |
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| Authors: | KANG Jiahui LIU Xiaohui ZHANG Yongbin XANG Baiyu |
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| Affiliation: | 1.Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua University, Chengdu 610039 China |
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| Abstract: | In this paper, taking Jinping I hydropower station left bank slope as an example, we set up a simplified three-dimensional geological model with weak structural plane. Based on the RFPA3D centrifugal loading method and the strength reduction method, the progressive failure process of the slope was simulated, and the applicability of different RFPA3D loading methods in slope stability analysis was discussed by reproducing the progressive failure process of the slope. The simulation results show that compared with the finite element numerical calculation methods such as FLAC3D and discrete element, the progressive slope failure process simulated by RFPA3D is simpler, more intuitive and efficient. The analysis of the progressive failure process shows that under natural conditions, the lamprophyre X and faults of the F5, F8, and F2 are the key factors for controlling the overall failure mode of slopes, which should be paid special attention during slope excavation. Stability analysis shows that the safety factor of slope calculated by Centrifuge method is 1.75, which is better than that calculated by SRM method. And the slope failure mode simulated by Centrifuge method is consistent with the actual engineering investigation results. Therefore, the RFPA-Centrifuge method is recommended when analyzing the slope failure mode. |
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