土体抗剪强度各向异性对边坡滑动模式与稳定性的影响

TU43; 基于极限分析法中的上限定理,开展了考虑土体抗剪强度各向异性的边坡稳定性研究,通过参数分析研究了土体抗剪强度各向异性对边坡失稳滑动方式与边坡稳定性安全系数的影响规律.结果表明:边坡稳定性安全系数随着抗剪强度各向异性系数减小而减小,其影响程度随着土体内摩擦角和坡度的减小而增大;对于土体黏聚力较大、内摩擦角较小的缓坡,随着抗剪强度各向异性系数减小,边坡的最危险滑动面会由坡脚深层破坏转变为坡底深层破坏,滑动范围显著增大;基于计算结果绘制了稳定图(stability chart),实现了考虑土体抗剪强度各向异性影响的边坡稳定性安全系数的快速计算与最危险滑动方式的判别....

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Published in江苏大学学报（自然科学版） Vol. 46; no. 1; pp. 91 - 97
Main Authors 张飞, 胡光华
Format Journal Article
LanguageChinese
Published 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京 210024 2025
河海大学江苏省岩土工程技术工程研究中心,江苏南京 210024
Subjects
shear strength
limit analysis
slide
anisotropy
边坡
各向异性
滑动
稳定性安全系数
slope
stability safety factor
抗剪强度
极限分析法
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Abstract TU43; 基于极限分析法中的上限定理,开展了考虑土体抗剪强度各向异性的边坡稳定性研究,通过参数分析研究了土体抗剪强度各向异性对边坡失稳滑动方式与边坡稳定性安全系数的影响规律.结果表明:边坡稳定性安全系数随着抗剪强度各向异性系数减小而减小,其影响程度随着土体内摩擦角和坡度的减小而增大;对于土体黏聚力较大、内摩擦角较小的缓坡,随着抗剪强度各向异性系数减小,边坡的最危险滑动面会由坡脚深层破坏转变为坡底深层破坏,滑动范围显著增大;基于计算结果绘制了稳定图(stability chart),实现了考虑土体抗剪强度各向异性影响的边坡稳定性安全系数的快速计算与最危险滑动方式的判别.
AbstractList TU43; 基于极限分析法中的上限定理,开展了考虑土体抗剪强度各向异性的边坡稳定性研究,通过参数分析研究了土体抗剪强度各向异性对边坡失稳滑动方式与边坡稳定性安全系数的影响规律.结果表明:边坡稳定性安全系数随着抗剪强度各向异性系数减小而减小,其影响程度随着土体内摩擦角和坡度的减小而增大;对于土体黏聚力较大、内摩擦角较小的缓坡,随着抗剪强度各向异性系数减小,边坡的最危险滑动面会由坡脚深层破坏转变为坡底深层破坏,滑动范围显著增大;基于计算结果绘制了稳定图(stability chart),实现了考虑土体抗剪强度各向异性影响的边坡稳定性安全系数的快速计算与最危险滑动方式的判别.
Abstract_FL Based on the upper-bound theorem of limit analysis,the slope stability analysis with considering soil strength anisotropy was carried out.The influence of soil shear strength anisotropy on the sliding mode of soil slope instability and the safety factor of slope stability was investigated by parameter analysis.The results show that the slope stability safety factor is decreased with the decreasing of anisotropy coefficient,and the influence degree is increased with the decreasing of friction angle and slope in the soil.Fort the gentle slope with large soil cohesion and low internal friction angle,the most dangerous sliding surface changes from the deep failure at the foot of slope to the deep failure at the bottom of slope with the decreasing of anisotropy coefficient,and the sliding range is increased significantly.Based on the calculation results,the stability chart is drawn,which realizes the rapid calculation of the slope safety factor and the judgment of sliding mode with considering the soil anisotropy.
Author 张飞
胡光华
AuthorAffiliation 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京 210024;河海大学江苏省岩土工程技术工程研究中心,江苏南京 210024
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Author_FL HU Guanghua
ZHANG Fei
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DocumentTitle_FL Effect of soil shear strength anisotropy on sliding mode and stability of slope
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Keywords shear strength
limit analysis
slide
anisotropy
边坡
各向异性
滑动
稳定性安全系数
slope
stability safety factor
抗剪强度
极限分析法
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PublicationTitle 江苏大学学报（自然科学版）
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Publisher 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京 210024
河海大学江苏省岩土工程技术工程研究中心,江苏南京 210024
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Title 土体抗剪强度各向异性对边坡滑动模式与稳定性的影响
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