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| Upper bound solution of slopes with cracks at tunnel entrance considering nonhomogeneity and anisotropy of soil strength |
| Received:September 22, 2021 Revised:December 26, 2021 |
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| DOI：10.7511/jslx20210922001 |
| KeyWord:tunnel slope stability nonhomogeneity anisotropy tensile crack limit analysis |
| Author | Institution |
| 张京伍 |
东华理工大学 土木与建筑工程学院, 南昌 ;江西省交通科学研究院有限公司, 南昌 |
| 李明东 |
东华理工大学 土木与建筑工程学院, 南昌 |
| 荣耀 |
江西省交通科学研究院有限公司, 南昌 |
| 刘志丹 |
合肥工业大学 土木与水利工程学院, 合肥 |
| 管仲敏 |
鹏盛建设集团有限公司, 上饶 |
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| Abstract: |
| In view of the slope stability evaluation error caused by ignoring the nonhomogeneity and anisotropy of soil,the theory of limit analysis coupled with the strength reduction method is applied,and the analytical formula for the stability of the slopes with cracks at tunnel entrance considering nonhomogeneity and anisotropy is derived.The influence of nonhomogeneity and anisotropy on the stability coefficient of slopes,the crack position of the slopes,the collapse range of tunnel vault and the safety factor are explored.The results demonstrate that the greater the crack depth and slope angle,the smaller the stability coefficient of the slope.The larger the nonhomogeneity coefficient and the smaller the anisotropy coefficient are,the larger the critical height of the slope is.When the nonhomogeneity coefficient and anisotropy coefficient increase,the crack position gets farther away from the edge of the top of the slope,which means the collapse range of the tunnel vault becomes greater.The increase of the coefficient of nonhomogeneity is beneficial to the stability of the slope,while the increase of the coefficient of anisotropy will lead to the instability of the slope. |
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