›› 2018, Vol. 39 ›› Issue (S1): 98-104.doi: 10.16285/j.rsm.2018.0524

• 基础理论与实验研究 • 上一篇    下一篇

边坡局部和整体稳定性评价方法的辩证统一

尹小涛1,薛海斌2,汤 华1,任兴文3,宋 罡1   

  1. 1. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点试验室,湖北 武汉 430071; 2. 西安理工大学 岩土工程研究所,陕西 西安 710048; 3. 西安长庆科技工程有限责任公司,陕西 西安 710021;
  • 收稿日期:2018-04-03 出版日期:2018-07-20 发布日期:2018-09-02
  • 作者简介:尹小涛,男,1975年生,博士,副研究员,主要从事岩土细观力学实验和数值模拟工作。
  • 基金资助:

    国家自然科学基金(No. 51778609,No. 51608518,No. 41202226);云南省交通科技项目(云交科教[2017]23号)。

Dialectical unity of slope local and global stability analysis methods

YIN Xiao-tao1, XUE Hai-bin2, TANG Hua1, REN Xing-wen3, SONG Gang1   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China ; 2. Institute of Geotechnical Engineering, Xi'an University of Technology, Xi'an, Shaanxi 710048, China; 3. Xi'an Changqing Technology Engineering Co., Ltd., Xi'an, Shaanxi 710021, China
  • Received:2018-04-03 Online:2018-07-20 Published:2018-09-02
  • Supported by:

    This work was supported by the Natural Science Foundation of China(51778609, 51608518, 41202226) and Traffic Science and Technology Project of Yunnan Province([2017]No.23).

摘要: 边坡稳定性评价方法有局部和整体两类,两者之间存在差异有其历史的局限性和存在的合理性。以极限平衡法和有限元强度折减法为例,分析了典型整体与局部稳定性评价方法在滑面搜索、平衡条件、安全系数的定义、材料参数和失稳等5个方面存在的异同。利用PFC算例揭示了真实边坡带有强烈空间和时间特征的渐进破坏特性,发现边坡失稳是自然地形的重塑、再造和稳定的过程,也是一个动势能转换和耗散的过程。针对边坡稳定问题及其特点,提出了基于广义软化的边坡稳定矢量和法的理论构架和技术路线,并进行了程序实现,克服了传统强度折减脱离实际材料劣化特征的不足,安全系数求解仅与应力状态相关,假设条件少,可以实现局部与整体稳定评价的辩证统一,可以反映边坡失稳的渐进特性和参数演化的时空效应。与传统极限平衡法(LEM)和强度折减法(SRM)在滑面和安全系数方面的综合对比发现,局部稳定揭示的滑面更稳定,获取的安全系数是全周期的,文中方法所得安全系数比整体方法的结果稍高,差异是整体方法的假设条件造成的。

关键词: 边坡, 局部稳定性评价方法, 整体稳定性评价方法, 滑面, 安全系数, 广义软化, 矢量和法

Abstract: Analysis method of slope stability can be classified into local and global kinds. These different points have their historical rationality and limit. Taking limit equilibrium method and strength reduction method for examples, the difference of typical local and global one such as slip surface, equilibrium condition, definition of safety factor, material parameters and un-stability is studied and summarized. Using a PFC slope fail case presents that real slope un-stability has observably spatiotamporal series and progressive features. Practical slope failure is a process of terrain reconstruction and stabilization and a process of potential and kinetic energy transition and dissipation. Aiming at these, the theoretical framework and technical route of slope stability vector sum method considering generalized softening are established. The relative program is implemented too. Whose reduction has material degradation back-ground. Its safety factor only relates to stress state of the slope. There are few assumed conditions in the method, which can realize dialectical unity of local and global stability and reflects progressive characteristics and spatiotamporal effect of slope un-stability. The safety factor and slip surface obtained by the method proposed compared with results of LEM and SRM, show that slip surface of local one is more stable, safety factor is whole life cycle and is larger than that of global one by 5%. The difference between local and global slope stability analysis method is caused by their assumed conditions.

Key words: slope, local stability evaluation method, global stability evaluation method, slip surface, safety factor, generalized softening, vector sum method

中图分类号: 

  • TU 472

[1] 荣驰, 陈卫忠, 袁敬强, 张铮, 张毅, 张庆艳, 刘奇, . 新型水玻璃−酯类注浆材料及其固沙体特性研究[J]. 岩土力学, 2020, 41(6): 2034-2042.
[2] 周强, 黎康平, 段亚辉, 曹子君, 李典庆, . 基于广义可靠指标相对安全率的地基承载力 安全判据研究[J]. 岩土力学, 2020, 41(6): 2052-2062.
[3] 任洋, 李天斌, 赖林. 强震区隧道洞口段边坡动力响应 特征离心振动台试验[J]. 岩土力学, 2020, 41(5): 1605-1612.
[4] 肖明清, 徐晨, . 基于临界稳定断面的隧道围岩稳定性分析方法探讨[J]. 岩土力学, 2020, 41(5): 1690-1698.
[5] 张卢明, 周勇, 范刚, 蔡红雨, 董云. 强震作用下核安全级反倾层状软岩高陡边坡组合支挡结构抗震性能研究与加固效果评价[J]. 岩土力学, 2020, 41(5): 1740-1749.
[6] 周子涵, 陈忠辉, 王建明, 张凌凡, 年庚乾. 爆破荷载作用下露天矿边坡稳定性的突变研究[J]. 岩土力学, 2020, 41(3): 849-857.
[7] 史振宁, 戚双星, 付宏渊, 曾铃, 何忠明, 方睿敏, . 降雨入渗条件下土质边坡含水率分 布与浅层稳定性研究[J]. 岩土力学, 2020, 41(3): 980-988.
[8] 苏永华, 李诚诚. 强降雨下基于Green-Ampt模型的边坡稳定性分析[J]. 岩土力学, 2020, 41(2): 389-398.
[9] 朱彦鹏, 陶钧, 杨校辉, 彭俊国, 吴强, . 框架预应力锚托板结构加固高填方边坡 设计与数值分析[J]. 岩土力学, 2020, 41(2): 612-623.
[10] 李剑, 陈善雄, 余飞, 姜领发, 戴张俊. 预应力锚索加固高陡边坡机制探讨[J]. 岩土力学, 2020, 41(2): 707-713.
[11] 闫国强, 殷跃平, 黄波林, 张枝华, 代贞伟, . 三峡库区巫山金鸡岭滑坡成因机制与变形特征[J]. 岩土力学, 2019, 40(S1): 329-340.
[12] 刘顺青, 黄献文, 周爱兆, 蔡国军, 姜朋明, . 基于随机块石模型的土石混合边坡稳定性 分析方法研究[J]. 岩土力学, 2019, 40(S1): 350-358.
[13] 刘红岩. 宏细观缺陷对岩体力学特性及边坡稳定影响研究[J]. 岩土力学, 2019, 40(S1): 431-439.
[14] 王伟, 陈国庆, 郑水全, 张广泽, 王栋, . 考虑张拉-剪切渐进破坏的边坡矢量和法研究[J]. 岩土力学, 2019, 40(S1): 468-476.
[15] 姜谙男, 张权, 吴洪涛, 段龙梅, 焦明伟, 白涛, . 基于改进局部安全度的爆破作用边坡稳定性分析[J]. 岩土力学, 2019, 40(S1): 511-518.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!