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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第41卷

期数:

2019年第05期

页码:

623-630

栏目:

工程地质

出版日期:

2019-09-15

文章信息/Info

Title:

Pseudo-dynamic Seismic Slope Stability Analysis Method Considering Wave Propagation Effects

文章编号:

1672-6561(2019)05-0623-08

作者:

邓亚虹¹; 徐召¹; 孙科¹; 2; 闫佐菲¹

(1. 长安大学 地质工程与测绘学院,陕西 西安 710054; 2. 中国煤炭地质总局航测遥感局,陕西 西安 710199)

Author(s):

DENG Ya-hong¹;  XU Zhao¹;  SUN Ke¹; 2;  YAN Zuo-fei¹

(1. School of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, Shaanxi, China; 2. Aerial Photogrammetry and Remote Sensing Bureau, China National Administration of Coal Geology, Xi'an 710199, Shaanxi, China)

关键词:

边坡稳定性;  波动效应;  拟动力法;  拟静力法;  地震系数;  极限平衡;  瑞典条分法;  安全系数

Keywords:

slope stability;  wave propagation effect;  pseudo-dynamic method;  pseudo-static method;  seismic coefficient;  limit equilibrium;  Felenius method;  safety factor

分类号:

P642.2

DOI:

-

文献标志码:

A

摘要:

考虑地震波在坡体内的传播特征,基于拟动力法,结合传统静力边坡稳定性分析极限平衡法(瑞典条分法),推导了边坡地震力公式和地震边坡稳定性安全系数公式。在此基础上,借助MATLAB软件开发了最危险滑面搜索和安全系数求解程序,实现了一种考虑波动效应的拟动力地震边坡稳定性分析方法。通过探讨地震动特性对地震边坡稳定性的影响,得到了地震边坡稳定性安全系数随地震动参数的变化规律。对于既定边坡,其安全系数随地震波初始相位呈现周期性波动变化,存在最小安全系数; 并且此安全系数随地震系数和地震波波长与边坡坡高比的增大而减小。此外,从波动理论角度揭示了拟动力法与拟静力法的区别与联系,给出了两类方法的适用范围:当地震波波长与边坡坡高比大于10时,两类方法所得结果基本一致,均适用; 而当地震波波长与边坡坡高比小于10时,拟静力法所得结果较拟动力法相对保守,仅拟动力法适用。

Abstract:

Considering the propagation characteristics of seismic waves in slopes, based on the pseudo-dynamic method and the traditional limit equilibrium method(Felenius method)for static slope stability analysis, the formulas for calculating the seismic force of slopes and the safety factor of seismic slope stability were derived. On this basis, a program for the sliding surface searching and safety factor calculation, which realizes a pseudo-dynamic seismic slope stability analysis method considering wave effect, was developed by MATLAB software. By discussing the influence of earthquake motion characteristics on seismic slope stability, the variation law of safety factor of seismic slope stability with earthquake motion parameters was obtained. For a given slope, its safety factor fluctuates periodically with the initial phase of seismic wave, and there exists a minimum safety factor, which decreases with the increase of seismic coefficient and the ratio of seismic wave length to slope height. In addition, the differences and relationships between pseudo-dynamic method and pseudo-static method were revealed from the perspective of wave theory, which gives the applicable scope of the two methods. When the ratio of seismic wave length to slope height is greater than 10, the results obtained by the two methods are basically same and applicable; while the ratio of seismic wave length to slope height is less than 10, the results obtained by the pseudo-static method are relatively conservative compared with the pseudo-dynamic method, thus only the pseudo-dynamic method is applicable.

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相似文献/References:

[1]郝建斌,姚婕,黄毓挺,等.动力作用下锚杆格构支护土质边坡动态响应分析[J].地球科学与环境学报,2015,37(05):93.
　HAO Jian-bin,YAO Jie,HUANG Yu-ting,et al.Analysis of Dynamic Response of Soil Slope Reinforced by Anchors and Lattices Subjected to Dynamic Loads[J].Journal of Earth Sciences and Environment,2015,37(05):93.
[2]熊炜,范文,邓龙胜,等.基于有限元修正节理岩质边坡稳定性计算的解析解[J].地球科学与环境学报,2011,33(03):306.
　XIONG Wei,FAN Wen,DENG Long-sheng,et al.Amendment of Analytical Solution on Stability of Joint Rock Slope Based on Finite Element Method[J].Journal of Earth Sciences and Environment,2011,33(05):306.

备注/Memo

备注/Memo:

收稿日期:2019-05-21; 修回日期:2019-07-13投稿网址:http:∥jese.chd.edu.cn/
基金项目:国家自然科学基金项目(41772275); 中央高校基本科研业务费专项资金项目(CHD300102268203)
作者简介:邓亚虹(1978-),男,湖南安化人,教授,博士研究生导师,工学博士,E-mail:dgdyh@chd.edu.cn。

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更新日期/Last Update: 2019-09-19