坝基不同倾角软弱夹层的破坏模式及D-C模型参数研究

吕布; 杨之俊; 韦秀东; 卢继忠; 傅旭东

doi:10.11779/CJGE2019S1048

坝基不同倾角软弱夹层的破坏模式及D-C模型参数研究 English Version

武汉大学土木建筑工程学院,湖北武汉 430072

基金项目: 国家自然科学基金面上项目（51378403）

详细信息

作者简介:
吕布(1992—),男,博士研究生,主要从事边坡工程、桩基理论和地基处理等方面的研究。E-mail:blv_whu@163.com。

通讯作者:
傅旭东，E-mail：xdfu@whu.edu.cn

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出版历程
- 收稿日期: 2019-04-29
- 发布日期: 2019-07-14

Failure modes and constitutive model for weak interlayer of dam foundation with different inclination angles

School of Civil Engineering, Wuhan University, Wuhan 430072, China

摘要

摘要: 坝基岩体中的软弱夹层对抗滑稳定影响重大,因此对其破坏模式及本构模型参数的研究具有重要意义。采用软弱夹层重塑样进行三轴压缩试验,下部未泥化部分采用泥化部分土掺入20%水泥代替,上部采用泥化部分土制样,泥化部分与未泥化部分交界面分别制成0°,30°,45°,60°倾斜面并作粗糙处理模拟实际界面特性。试验结果表明：含不同倾角结构面的软弱夹层试样临界角范围为58.3°~61.7°,当结构面倾角介于临界角范围之内时,软弱夹层试样沿结构面破坏,当结构面倾角位于临界角范围之外时,软弱夹层试样在上部泥化部分土中破坏;对软弱夹层试样三轴试验 $\varepsilon (({{\sigma }_{1}}-{{\sigma }_{3}}))$ – ${{\varepsilon }_{1}}$ 关系曲线进行线性拟合,结果表明,随围压增加,试样初始切线模量及极限破坏强度均增加,根据试验结果得出了相应的D-C模型参数并将其应用于坝基抗滑设计中,取得了良好效果。本研究成果对坝基软弱夹层的抗滑设计及同类软弱夹层工程性质的研究具有一定参考价值。
- 软弱夹层 /
- 倾角 /
- 三轴试验 /
- 破坏模式 /
- 本构模型参数
Abstract:
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- weak interlayer /
- inclination angle /
- triaxial test /
- failure mode /
- constitutive model parameter

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参考文献(11)

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