土质边坡地震稳定性状态判定方法研究

张江伟; 李小军; 王晓明; 迟明杰; 王玉石

doi:10.11779/CJGE201811016

土质边坡地震稳定性状态判定方法研究 English Version

1. 河北地质大学勘查技术与工程学院,河北石家庄 050031;
2.中国地震局地球物理研究所,北京 100081

基金项目: 国家重点研发计划项目（2017YFC1500400）; 国家自然科学基金项目（51639006）; 河北省高等学校科学技术研究项目（QN2018242）

详细信息

作者简介:
张江伟(1988- ),男,博士,讲师,主要从事地震地质灾害方面的研究工作。E-mail: zjwok1988@sina.com。

中图分类号: TU443
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- 文章访问数: 249
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出版历程
- 收稿日期: 2018-04-16
- 发布日期: 2018-11-24

Method for judging seismic stability state of soil slopes

1. College of Prospecting Technology and Engineering, Hebei GEO University, Shijiazhuang 050031, China;
2. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China

摘要

摘要: 基于有限元强度折减法,对地震作用下土质边坡稳定性状态判定方法进行了研究。探讨了地震作用下坡体内部等效塑性应变区贯通率的计算方法,并利用有限元计算和统计分析方法建立了地震作用下坡体内部等效塑性应变区贯通率与边坡动力安全系数的对应关系。根据《建筑边坡工程技术规范》（GB50330—2013）中边坡稳定性状态与边坡安全系数的对应关系,从而实现了利用坡体内部等效塑性应变区贯通率来判别边坡地震稳定性状态的方法。结果表明：当等效塑性应变区贯通率K=100% 时对应边坡稳定性状态为不稳定,当等效塑性应变区贯通率100%>K≥90% 时对应边坡稳定性状态为欠稳定,等效塑性应变区贯通率90%>K≥85% 时对应边坡稳定性状态为基本稳定,等效塑性应变区贯通率K<85% 时对应边坡稳定性状态为稳定。研究结果对于震后边坡稳定性的快速评价将具有重要的借鉴意义。
- 地震 /
- 地震响应 /
- 动力有限元 /
- 土质边坡 /
- 安全评价
Abstract: Based on the strength reduction FEM, the method for judging the stability state of soil slopes under earthquake action is analyzed. The length ratio of equivalent plastic strain zone in the slope is defined, and the corresponding relationship between the length ratio of equivalent plastic strain zone in the slope under earthquake and the safety factor is established through statistical analysis. Then, according to the corresponding relationship between the stability and safety factor of slopes in the Chinese national standard “Technical code for building slope engineering” (GB50330—2013), the method for judging the stability of the slopes under earthquake by the length ratio of equivalent plastic strain zone is realized. The results show that when the length ratio of equivalent plastic strain zone is 100%, the slope is instable; when it is between 90% and 100%, the slope is understable; when it is between 85% and 90%, the slope is basically stable; and when it is below 85%, the slope is stable. The results may have a great reference value to the rapid evaluation work of seismic hazards of slopes．
- earthquake /
- seismic response /
- dynamic FEM /
- soil slope /
- safety evaluation

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参考文献(21)

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