考虑土体空间变异性的边坡最危险滑动面随机分析方法

录井工程

2013, Vol. 47

Issue (6): 745-753

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考虑土体空间变异性的边坡最危险滑动面随机分析方法

祁小辉^{1, 2}, 李典庆^{1, 2}, 周创兵^{1, 2}, 方国光³

1. 武汉大学水资源与水电工程科学国家重点实验室，湖北武汉 430072; 2. 武汉大学水工岩石力学教育部重点实验室，湖北武汉 430072; 3. 新加坡国立大学土木与环境工程系，新加坡 117576

Stochastic analysis method of critical slip surfaces in soil slopes considering spatial variability

QI Xiao-hui^{1, 2}, LI Dian-qing^{1, 2}, ZHOU Chuang-bing^{1, 2}, PHOON Kok-kwang³

1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; 2. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering (Wuhan University), Ministry of Education, Wuhan 430072, China; 3. Department of Civil and Environmental Engineering, National University of Singapore, 117576, Singapore

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摘要现有边坡可靠度研究均未考虑土体空间变异性对边坡最危险滑面的影响。为此，提出了考虑土体空间变异性的边坡最危险滑动面随机分析方法。首先，采用谱表现法建立了表征土体空间变异性的随机场模型。在此基础上，提出了基于SIGMA/W和SLOPE/W的自动定位搜索最危险滑动面方法。其次，采用非侵入式随机分析方法研究了抗剪强度参数空间变异性对边坡最危险滑动面空间分布的影响。最后，采用算例验证了所提方法的有效性。结果表明：提出的边坡最危险滑动面随机分析方法能够有效地确定边坡最危险滑动面空间分布特征。土体抗剪强度参数的空间变异性对边坡最危险滑动面的空间分布特征有重要的影响，它直接决定了边坡最危险滑动面的位置和滑体规模。土体抗剪强度参数波动范围越大，最危险滑动面的空间分布范围越大。随着土体抗剪强度参数水平向和竖直向波动范围比值的增大，边坡上部发生局部滑动的可能性增大。抗剪强度参数的变异系数越大，最危险滑动面的空间分布范围越大，边坡发生小规模局部滑动的可能性越大。

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	祁小辉
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关键词 ：边坡稳定性, 最危险滑动面, 空间变异性, 非侵入式随机分析, 安全系数

收稿日期: 2012-05-25

ZTFLH:

TU47

基金资助:基金项目：国家杰出青年科学基金项目（51225903）；国家重点基础研究发展计划（973计划）项目（2011CB013506）；国家自然科学基金项目（51079112）

通讯作者: *通讯作者

作者简介: 作者简介：祁小辉(1989- )，男，博士研究生，主要从事岩土工程可靠度与风险分析方面的研究。E-mail：dianqing@whu.edu.cn。

引用本文:

祁小辉, 李典庆, 周创兵, 方国光. 考虑土体空间变异性的边坡最危险滑动面随机分析方法[J]. 录井工程, 2013, 47(6): 745-753.
QI Xiao-hui, LI Dian-qing, ZHOU Chuang-bing, PHOON Kok-kwang. Stochastic analysis method of critical slip surfaces in soil slopes considering spatial variability. ljgc, 2013, 47(6): 745-753.

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http://192.168.0.151:8080/Jwk_cyfdj/CN/ 或 http://192.168.0.151:8080/Jwk_cyfdj/CN/Y2013/V47/I6/745

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