Rock and Soil Mechanics ›› 2019, Vol. 40 ›› Issue (7): 2574-2580.doi: 10.16285/j.rsm.2018.0456

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Conception and model test of shear bond supporting system

SHEN Hong1, LI Xiao1, LEI Mei-qing2, XU Wen-bo1, YU Xiu-ling1   

  1. 1. School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, Hubei 430070, China; 2. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
  • Received:2018-03-26 Online:2019-07-11 Published:2019-07-19
  • Supported by:
    This work was supported by the General Program of the National Natural Science Foundation of China (11672215).

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Abstract: In this paper, a new type of support form-shear bond supporting system, which is composed of vertical and oblique piles, is put forward for deep and large foundation pit construction. Through model test, the horizontal displacement of pile top and internal force of pile body are measured at different excavation depths for shear bond group and single row cantilever pile group, respectively. Finite element numerical simulation is carried out at the same time. The results show that the maximum horizontal displacement of the pile top in shear bond group is about 1/10 of that in cantilever group, and the maximum bending moment of the pile in shear bond group is about half of that in cantilever group. Shear bond supporting system has greater stiffness, and it can effectively reduce the displacement of pile top and the maximum bending moment of pile body. It consumes less material, is able to support deeper excavation, and occupies less space, which will not hinder the construction of the main basement. Therefore, it can save time and cost, and provide a new idea for deep foundation pit supporting.

Key words: deep and large foundation pit, shear bond supporting system, single row cantilever pile, horizontal displacement, pile bending moment

CLC Number: 

  • TU 470
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