南水北调南干渠边坡有限元稳定性分析
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国家自然科学基金资助项目(51578214);中央高校基本科研业务费专项资金资助项目(2015B17714);中国交通建设股份有限公司科技研发项目(2012-ZJKJ-11)


Finite element stability analysis on slope of South Main Canal of South to North Water Diversion Project
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    摘要:

    采用有限元强度折减法,对南水北调南干渠典型断面进行稳定性分析。计算采用邓肯非线性弹性模型,对渠道边坡的实际开挖施工过程进行模拟。以最大水平位移作为失稳判据,建立最大水平位移和折减系数之间关系曲线,得到不同折减系数下土坡应力变形分布规律和边坡安全系数。计算结果表明,有限元强度折减法,能够较真实地考虑土体应力应变关系和施工过程影响,所得边坡稳定系数略大于毕肖普法计算结果,计算断面稳定安全系数满足规范要求。

    Abstract:

    The strength reduction finite element method was used to analyze the stability of the typical section of the South Main Canal of South to North Water Diversion Project. The Duncan-Chang nonlinear constitutive model was employed to describe the stress and strain relationship of the soils. The displacement mutation of the maximal horizontal displacement of the slope was used as a criterion for evaluating the instability. The research results based on the FEM reduction stability analysis was verified by traditional simplified Bishop Method. There is good accordance between both methods, which proved that the analysis is reasonable. And both results fulfil the designation requirement.

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张坤勇,李广山,李旺林,杜伟.南水北调南干渠边坡有限元稳定性分析[J].河北工程大学自然版,2016,33(4):27-32

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  • 收稿日期:2016-06-16
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  • 在线发布日期: 2016-12-28
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