›› 2018, Vol. 39 ›› Issue (1): 85-92.doi: 10.16285/j.rsm.2017.0330

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Stress transfer mechanism of soil anchor body

YOU Zhi-jia1, FU Hou-li2, YOU Chun-an1, ZHANG Jun1,3, SHAO Hui1, BI Dong-bin1, SHI Jian1   

  1. 1. College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao, Shandong 266590, China; 2. School of Civil Engineering and Architecture, Linyi University, Linyi, Shandong 276000, China; 3. Department of Resources and Civil Engineering, Shandong University of Science and Technology, Tai’an, Shandong 271019, China
  • Received:2017-02-28 Online:2018-01-10 Published:2018-06-06
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (51274131).

Abstract: Based on the characteristics of stress axisymmetric of the anchorage body, an experimental device of anchor-soil interface is developed. By means of 2D digital speckle correlation method, the displacement field and the strain field of soil surrounding anchorage body are obtained. Experimental results show that, the deformation of the surrounding soil caused by the displacement of the anchor is mainly in a small thin layer that is near the anchorage body, and its deformation is characterized by stable range, continuous, linear and shear dilation. On this basis, the constitutive relationship of the anchorage body interface layer is established according to the flow rule associated with Coulomb yield condition, and then the expressions of axial force and shear stress distribution under the condition of drawing load are deduced. The result indicates that the degree of uniformity of shear stress on anchorage body is closely related to soil compactness. The lower the soil compaction, the smaller the resistance coefficient and the angle of internal friction, and the shear stress distribution is more uniform on the anchor. While for the soil with larger resistance coefficient and internal friction, the shear stress distribution is similar to the theory and measured results of the rock anchor solid.

Key words: soil anchorage body, interface layer, stress transfer, constitutive relationship, resistance coefficient

CLC Number: 

  • TD 353

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