考虑墙前填土作用下无黏性填土挡墙地震转动稳定性分析

刘杰; 黄达; 顾东明; 岑夺丰; 曾彬

doi:10.11779/CJGE201411022

考虑墙前填土作用下无黏性填土挡墙地震转动稳定性分析 English Version

刘杰^1,2,
黄达^1,3,,
顾东明¹,
岑夺丰¹,
曾彬¹

1.重庆大学土木工程学院, 重庆400045;
2.河北工程大学土木工程学院, 河北邯郸056038;
3.重庆大学, 重庆400045

基金项目: 国家自然科学基金面上项目（41472245,41172243）; 中央高校基本科研业务费重点项目（CDJZR12205501）

详细信息

作者简介:
刘杰(1981-),男,博士研究生,主要从事岩土工程及滑坡地质灾害方面的研究。E-mail:jieliucqu@cqu.edu.cn。

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出版历程
- 收稿日期: 2014-02-20
- 发布日期: 2014-11-19

Seismic rotating stability analysis of retaining wall backfilled by cohesiveless soils considering influence of front cover soils

1. College of Civil Engineering, Chongqing University, Chongqing 400045, China;
2. College of Civil Engineering, Hebei University of Engineering, Handan 056038, China;
3. Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education, Chongqing University, Chongqing 400045, China

摘要

摘要: 重力式挡土墙在地震作用下的稳定性一直是岩土工程研究的热点问题。将墙前填土、墙后填土、挡墙三者看作统一体系,假设无黏性填土材料服从莫尔库仑破坏准则,根据极限分析上限理论,研究了重力式挡墙在地震作用下的纯转动稳定性。基于纯转动破坏假设,得到考虑墙前填土作用下地震屈服加速度及破裂面倾角的计算公式,并得到了屈服加速度系数的最优解。计算结果与Mononobe-Okabe法的计算结果一致,验证了该方法的合理性。地震屈服加速度系数k随挡墙前后填土高度比（H /H）的增大而增大,特别是当高度比大于0.15后,k随H /H增大呈较快速地增加。故适当增加墙前填土高度,可有效地提高挡墙地震作用下的转动稳定性。
- 重力式挡墙 /
- 墙前填土 /
- 地震 /
- 地震屈服加速度
Abstract: The seismic rotating stability analysis of gravity retaining walls is always the hot research spot in geotechnical engineering. The retaining wall, backﬁlled soils behind it and front cover soils are taken as a whole system. According to the upper bound method, assuming that the backﬁlled soils obey the Mohr-Coulomb criterion, the seismic rotating stability of gravity retaining walls is studied. Considering the effect of front cover soils for a pure rotational failure mechanism assumed, formulas are derived to calculate directly the yield acceleration and the inclination of the failure surface. The optimal solution of the yield acceleration is found. The calculated results are in agreement with the ones obtained by the Mononobe-Okabe method, and the proposed method is validated. The seismic yield acceleration coefficient k_crincreases with the increasing height ratio of front cover soils to backfills (H₂ /H₁). Especially, when the value of H₂ /H₁ is greater than 0.15, k_cr increases rapidly with an increase in H₂ /H₁. Therefore felicitous increase of front cover soils can improve the seismic rotating stability of retaining walls.
- gravity retaining wall /
- front cover soil /
- earthquake /
- seismic yield acceleration

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参考文献(13)

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