2D and 3D stability analysis of slurry trench in frictional/cohesive soil
2D and 3D stability analysis of slurry trench in frictional/cohesive soil
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DOI：
10.1631/jzus.a1200257
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发表时间：
2013-02
期刊：
影响因子：
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通讯作者：
Changyu Han;Jin-jian Chen;Jian-Hua Wang;X. Xia
中科院分区：
文献类型：
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作者：
Changyu Han;Jin-jian Chen;Jian-Hua Wang;X. Xia
提出了一种二维和三维运动学允许的旋转破坏机制，用于摩擦/粘性土壤中的均质泥浆沟槽。推导了在严格的极限分析框架下获得泥浆槽稳定性上界的解析方法。结果表明，3D分析的安全系数将大于2D分析。与极限平衡法相比，极限分析法给出的安全系数估计不保守。一组例子中提出了一个广泛的参数范围内的二维和三维均匀泥浆沟槽。随着浆土容重比、粘聚力、内摩擦角的增大，浆层深度与槽深比、槽宽与槽深比的减小，安全系数增大。在实际应用中，可以方便地对均质泥浆槽进行安全性评价。
A 2D and 3D kinematically admissible rotational failure mechanism is presented for homogeneous slurry trenches in frictional/cohesive soils. Analytical approaches are derived to obtain the upper bounds on slurry trench stability in the strict framework of limit analysis. It is shown that the factor of safety from a 3D analysis will be greater than that from a 2D analysis. Compared with the limit equilibrium method, the limit analysis method yields an unconservative estimate on the safety factors. A set of examples are presented in a wide range of parameters for 2D and 3D homogeneous slurry trenches. The factor of safety increases with increasing slurry and soil bulk density ratio, cohesion, friction angle, and with decreasing slurry level depth and trench depth ratio, trench width and depth ratio. It is convenient to assess the safety for the homogeneous slurry trenches in practical applications.