›› 2018, Vol. 39 ›› Issue (4): 1176-1181.doi: 10.16285/j.rsm.2016.0812

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research on stable limit depth of vertical cylinder hole in cohesive soil ground

YAN Shu-wang1, 2, LI Jia1, 2, YAN Yue1, 2, CHEN Hao3   

  1. 1. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China; 2. School of Civil Engineering, Tianjin University, Tianjin 300072, China; 3. School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore
  • Received:2016-04-18 Online:2018-04-11 Published:2018-06-06
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (41402263) and the Natural Science Foundation of Tianjin (No. 13JCZDJC35300).

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Abstract: Vertical circular holes are often encountered in practices. The limit depth of without supporting is important for a stable vertical cylinder hole in cohesive soil. Firstly, if the failure surface is planar and pass through the slope toe, the stable limit height of the slope can be obtained by limit equilibrium analysis of vertical slope, and compared with Taylor’s results by circular sliding surface. Secondly, planar sliding surface is extended to the axisymmetric problem for vertical cylinder hole in cohesive soil. Assuming the failure surface is an inverted round estrade, and a relationship between cu /?h and h/r can be solved by limit equilibrium analysis, and provide the basis in engineering design. Thirdly, vertical cylinder hole with different geometrical parameters are numerically modeled and the lower limiting values of cu /?h are summarized. The results show that limit equilibrium method results coincided well with the numerical analysis results.

Key words: cohesive soil ground, vertical cylinder hole, limit equilibrium method, stable limit depth, numerical analysis

CLC Number: 

  • TU 443

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