岩土力学 ›› 2023, Vol. 44 ›› Issue (8): 2419-2431.doi: 10.16285/j.rsm.2022.1356

• 数值分析 • 上一篇    下一篇

考虑贯通型结构面强度震动退化的岩质边坡动力稳定性研究

许彬1, 2, 3, 4，刘新荣3，周小涵3，梁越1, 2, 4，钟祖良3，刘俊5，邓志云6   

  1. 1. 重庆交通大学 河海学院，重庆 400074；2. 重庆交通大学 水利水运工程教育部重点实验室，重庆 400074； 3. 重庆大学 土木工程学院，重庆 400045；4. 重庆交通大学 国家内河航道整治工程技术研究中心，重庆 400074； 5. 中国建筑第二工程局有限公司，北京 100160；6. 清华大学 水利水电工程系，北京 100084
  • 收稿日期:2022-09-02 接受日期:2022-12-30 出版日期:2023-08-21 发布日期:2023-08-21
  • 通讯作者: 刘新荣，男，1969年生，博士，教授，博士生导师，主要从事岩土力学与边坡工程等方面的教学与科研工作。E-mail: liuxrong@126.com E-mail: geotechnicale2016@163.com
  • 作者简介:许彬，男，1993年生，博士后，主要从事岩土力学与边坡工程等方面的科研工作。
  • 基金资助:
    中国博士后科学基金（No. 2023M730432）；重庆市博士后特别资助项目（No. 2022CQBSHTB1010）；重庆市博士后科学基金（No. CSTB2023NSCQ- BHX0223）；国家内河航道整治工程技术研究中心暨水利水运工程教育部重点实验室开放基金（No. SLK2023A03）；重庆交通大学博士后科学基金（No. 22JDKJC-A008）

Dynamic stability analysis of rock slope considering the strength vibration degradation of through-type rock discontinuities

XU Bin1, 2, 3, 4, LIU Xin-rong3, ZHOU Xiao-han3, LIANG Yue1, 2, 4, ZHONG Zu-liang3, LIU Jun5, DENG Zhi-yun6   

  1. 1. School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing 400047, China; 3. School of Civil Engineering, Chongqing University, Chongqing 400045, China; 4. National Engineering Research Center for Inland Waterway Regulation, Chongqing Jiaotong University, Chongqing 400074, China; 5. China Construction Second Engineering Bureau Ltd., Beijing 100160, China; 6. Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China
  • Received:2022-09-02 Accepted:2022-12-30 Online:2023-08-21 Published:2023-08-21
  • Supported by:
    This work was supported by the China Postdoctoral Science Foundation (2023M730432), the Special Funding for Chongqing Postdoctoral Research Project (2022CQBSHTB1010), the Chongqing Postdoctoral Science Foundation (CSTB2023NSCQ-BHX0223), the Open Foundation of the Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University (SLK2023A03), the Postdoctoral Science Foundation of Chongqing Jiaotong University (22JDKJC-A008).

PDF (Chinese)

188

摘要： 考虑结构面抗剪强度震动退化效应对分析与评价岩质边坡动力稳定性具有重要意义。基于岩石动力试验获取了多因素影响的结构面强度震动退化系数方程，结合极限平衡理论和动态矢量法原理，以UDEC程序作为计算引擎，采用其内置Fish语言编程实时刷新结构面强度特性参数和捕获任意地震历时时刻边坡地震惯性力，并以最小平均安全系数法求解边坡最终动力稳定性评价指标值，从而提出了一种考虑结构面强度震动退化的边坡动力稳定性系数动态算法。研究表明：结构面强度震动退化系数是取决于岩块间循环剪切次数、循环剪切幅度及相对运动速度响应值的动态变量；将该算法应用于含贯通型平直状结构面边坡动力稳定性算例中，其分析结果表明，动力作用时程内考虑结构面强度震动退化的边坡动力稳定性系数较未考虑该效应时的系数衰减更为明显，即前者计算结果更符合一般性自然规律，亦即验证了该算法的可行性；结构面最小强度震动退化系数随动力激励时程变化近似呈负指数函数形式逐渐衰减，且当结构面初始黏聚力（内摩擦角）越大、而坡角（层面倾角）或动荷载幅值（频率）越小时，地震历时过程中边坡最小动力稳定性系数越大，此时边坡最终动力稳定性相对越强。

关键词: 结构面, 强度震动退化, 数值实现, 边坡动力稳定性, 影响因素

Abstract: The shear strength vibration degradation of the rock discontinuities is of great significance to analyze and evaluate the dynamic stability of rock slope. Based on the rock dynamic test, the strength vibration degradation coefficient equation of the rock discontinuities affected by multiple factors was obtained. Then, combined with the limit equilibrium theory and the principle of dynamic vector method, the UDEC program was used for calculation, and its built-in Fish language was used to program to update the strength characteristic parameters of the rock discontinuities in real time and capture the seismic inertia force of slope at any time of earthquake duration, and the minimum average safety coefficient method was adopted to solve the final dynamic stability evaluation index. Thereby, a dynamic algorithm of slope dynamic stability coefficient considering the strength vibration degradation of the rock discontinuities was proposed. The results show that: (1) The strength vibration degradation coefficient of the rock discontinuities is a dynamic variable that depends on the response value of the number and amplitude of cyclic shearing and the relative motion speed between rock blocks. (2) The algorithm is applied to the calculation example of the dynamic stability of slope with the through-type and straight rock discontinuities. The analysis results show that in the dynamic action time history, the attenuation of the dynamic stability coefficient of slope considering the strength vibration degradation of the rock discontinuities is more obvious than that without considering the effect, i.e. the calculation results of the former are more in line with the actual observation, which verify the feasibility of the proposed algorithm. (3) The minimum strength vibration degradation coefficient of the rock discontinuities decays gradually in the form of negative exponential function with the time-history change of dynamic excitation. The larger the initial cohesion (internal friction angle) of the rock discontinuities is, the smaller the slope angle (layer inclination) or dynamic load amplitude (frequency) is, the larger the minimum dynamic stability coefficient of slope during the earthquake duration is, and the relatively stronger the final dynamic stability of slope is at this time.

Key words: rock discontinuities, strength vibration degradation, numerical realization, dynamic stability of slope, influence factor

中图分类号: TU 457
[1] 黄曼, 宁昊晟, 洪陈杰, 陶志刚, 刘雨星, 张贺, . 基于第二代负泊松比锚杆加固的充填结构面剪切特性研究[J]. 岩土力学, 2025, 46(S1): 131-140.
[2] 霍亮, 王贵宾, 邬书良, 张修香, 黄志国, 吴志春, . 基于混合Fisher分布的随机结构面产状聚类模型[J]. 岩土力学, 2025, 46(7): 2211-2223.
[3] 司马劲松, 许强, 董秀军, 邓博, 何秋霖, 黎浩良, 刘杰, 雷文权. 基于改进区域生长算法对岩体结构面识别的应用[J]. 岩土力学, 2025, 46(7): 2253-2264.
[4] 徐全, 侯靖, 杨剑, 杨昕光, 倪绍虎, 陈鑫. 基于合成岩体技术的岩质边坡稳定性精细化分析[J]. 岩土力学, 2025, 46(7): 2062-2070.
[5] 吕萌, 王亮清, 谢妮, 朱林锋, 安彩龙, 柯睿, 王旭晨, . 加锚异性结构面剪切特性及声发射响应特征研究[J]. 岩土力学, 2025, 46(7): 2106-2120.
[6] 尹敬涵, 盛谦, 崔臻, 张茂础, . 基于多尺寸结构面的循环剪切力学特性及其抗剪强度研究[J]. 岩土力学, 2024, 45(S1): 405-414.
[7] 李新正, 王述红, 侯钦宽, 董福瑞. 基于t-SNE的多参数岩体结构面分步聚类方法[J]. 岩土力学, 2024, 45(5): 1540-1550.
[8] 张冬梅, 张学亮, 杜伟伟, . 基于离散单元法的渗流侵蚀作用下桩基位移与承载特性研究[J]. 岩土力学, 2024, 45(4): 1181-1189.
[9] 雷华阳, 薄钰, 马长远, 王磊, 章纬地, . 多因素影响下黏土比热容变化规律及预测模型[J]. 岩土力学, 2023, 44(S1): 1-11.
[10] 邓华锋, 冯云杰, 李建林, 王文东, 李冠野, 齐豫, . 基于光照技术的配称结构面有效受剪区域量化研究[J]. 岩土力学, 2023, 44(S1): 63-72.
[11] 刘畅, 江权, 阮航, 李超毅, 杜三林. 常法向应力下非连续结构面剪切破坏特征研究[J]. 岩土力学, 2023, 44(S1): 173-185.
[12] 陈柏林, 杨文君, 谢强, 彭海游, 叶晓明, 檀康, 周鹏, . 沿缓倾软弱外倾结构面滑动的主动岩石压力计算[J]. 岩土力学, 2023, 44(11): 3272-3279.
[13] 尹敬涵, 崔臻, 盛谦, 陈健, 张茂础, . 循环荷载作用下岩石劈裂结构面剪切力学特性演化与影响因素研究[J]. 岩土力学, 2023, 44(1): 109-118.
[14] 郭佳奇, 程立攀, 朱斌忠, 田永超, 黄鑫. 持续开挖效应下结构面剪切力学性质与能量特征研究[J]. 岩土力学, 2023, 44(1): 131-143.
[15] 曾召田, 梁珍, 孙凌云, 付慧丽, 范理云, 潘斌, 于海浩, . 水泥胶结钙质砂导热系数的影响因素试验研究[J]. 岩土力学, 2022, 43(S1): 88-96.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
版权所有 © 《岩土力学》编辑部
地址：湖北武汉武昌小洪山中国科学院武汉岩土力学研究所(430071)　邮编：200042　电话：027-87198484　E-mail: ytlx@whrsm.ac.cn
本系统由北京玛格泰克科技发展有限公司设计开发