Research on failure mode of clay slope containing horizontal sand interlayer under excavation conditions

LI Ming; ZHANG Ga; ZHANG Jian-min; LEE C F

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Research on failure mode of clay slope containing horizontal sand interlayer under excavation conditions

更新时间：2026-06-25

- Research on failure mode of clay slope containing horizontal sand interlayer under excavation conditions
- Vol. 32, Issue S1, (2011)
- 作者机构：
  
  清华大学水沙科学与水利水电工程国家重点实验室,北京,100084
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU471
- Online First：16 May 2011，
  
  Published：2011
- 稿件说明：
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LI Ming, ZHANG Ga, ZHANG Jian-min, et al. Research on failure mode of clay slope containing horizontal sand interlayer under excavation conditions[J]. 2011, 32(S1).
DOI：

LI Ming, ZHANG Ga, ZHANG Jian-min, et al. Research on failure mode of clay slope containing horizontal sand interlayer under excavation conditions[J]. 2011, 32(S1). DOI：

摘要

工程中经常遇到边坡中含有夹层的情况，对含夹层边坡的稳定性研究很有意义。目前的研究多着重于含夹层岩质边坡的稳定性，对土质边坡涉及较少，尚无系统的试验分析。开挖条件下含夹层土质边坡更容易发生破坏，对其破坏模式的正确认知有助于对其稳定性进行合理的安全评价。进行了含水平砂土夹层边坡开挖的离心模型试验，夹层位于边坡中部。通过与边界和试验条件相同的素土边坡进行对比，分析了中部夹砂层边坡开挖后的破坏模式。试验结果表明，中部砂土夹层的存在降低了边坡在开挖后的稳定性，且其下边界是边坡破坏的薄弱控制面

Abstract

Slopes containing interlayers are common phenomenon in practice and it makes sense to research stabilities of such slopes. So far as the recent research is concerned

it mainly focuses on the stability of rock slope and little recognition of clay slope is involved. In fact

it is more dangerous for clay slopes containing interlayers under excavation conditions and correct recognition of failure modes of clay slopes contribute to the reasonable assessment of stability. Some centrifuge model tests were conducted with clay slopes containing interlayers in the middle part under excavation conditions. Comparison of failure modes was made between clay slopes with and without a 5 cm thick horizontal sand interlayer. The results show that the existence of sand interlayer diminishes the stability of slope; and the bottom boundary of sand interlayer is the weak plane

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