考虑参数时空演化规律的黄土边坡极限平衡分析法研究

薛海斌; 张聪敏; 党发宁; 尹小涛; 丁卫华

doi:10.11779/CJGE2018S2033

考虑参数时空演化规律的黄土边坡极限平衡分析法研究 English Version

1. 西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安 710048;
2. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉 430071

基金项目: 国家自然科学基金项目（51679199,51778609）; 陕西省科技统筹创新工程重点实验室项目（2014SZS15-Z01）; 教师博士科研启动经费项目（107-256081705）; 云南省交通科技项目（云交科教（2017）23号）; 陕西省教育厅科研计划项目（18JK0548）

详细信息

作者简介:
薛海斌(1988- ),男,讲师,从事黄土边坡稳定性分析方法、岩土工程数值分析方法及优化设计研究。E-mail：xhbyts2013@163.com。

中图分类号: TU444
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出版历程
- 收稿日期: 2018-07-21
- 发布日期: 2018-10-29

Limit equilibrium analysis method for loess slopes considering spatial-temporal evolution laws of parameters

1. State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China;
2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China

摘要

摘要: 考虑黄土特殊力学性质的边坡稳定性分析方法研究对于保障国家“西部大开发”战略和“一带一路”倡议的实施具有重要的意义。利用渗流—软化—稳定性分析顺序耦合的研究思路,对地下水位上升条件下的黄土边坡稳定性进行分析。首先借助非饱和非稳定渗流分析理论进行地下水位上升条件下黄土边坡的渗流分析;其次基于渗流分析的计算成果借助水致结构性劣化方程动态更新土体强度参数的空间分布;基于总重度、黏聚力、内摩擦角和孔隙水压力的时空分布规律,采用面力法提出了考虑参数时空演化规律的黄土边坡极限平衡分析法。最后以地下水位上升条件下白鹿塬边某黄土边坡为例,通过考虑参数时空演化规律的黄土边坡稳定性Spencer法和M-P法计算成果之间的相互对比分析,同时将这些成果与现场勘察迹象进行对比,从而说明考虑参数时空演化规律的黄土边坡极限平衡分析法的合理性和可靠性。
- 黄土边坡 /
- 水致结构性劣化 /
- 时空演化规律 /
- 极限平衡分析法 /
- 地下水位上升
Abstract: The research on the slope stability analysis method considering the special mechanical properties of the loess is of great significance to the implementation of the national strategy of "Western Development" and the initiative of "Belt and Road". Based on the research idea of the sequential coupling of seepage-softening-stability analysis, the stability of the loess slope under rising of the ground water level is studied. Firstly, the seepage analysis of the loess slope under rising of the ground water level is carried out by using the unsaturated unsteady seepage analysis theory. Secondly, based on the calculated results of the seepage analysis, the spatial distributions of strength parameters are dynamically updated by the water-induced structural deterioration equation. Thirdly, based on the spatial-temporal distribution laws of total unit weight, cohesion, internal friction angle and pore pressure, the limit equilibrium analysis method for the loess slope considering spatial-temporal evolution laws of parameters is proposed. Finally, taking a loess slope in Bailuyuan of Xi'an city in China as an example, the stability of the loess slope is comparatively analyzed by using the Spencer’s method and the M-P’s method considering spatial-temporal distribution laws of parameters. Meanwhile, the comparative analysis of the calculated results by using the proposed method with the on-site investigation is done, thus the reasonability and reliability of the proposed method are verified.
- loess slope /
- water-induced structural deterioration /
- spatial-temporal evolution law /
- limit equilibrium analysis method /
- rising of the ground water level

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参考文献(11)

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