Rock and Soil Mechanics ›› 2019, Vol. 40 ›› Issue (11): 4429-4438.doi: 10.16285/j.rsm.2018.0714

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Model test of rectangular pile penetration effect in transparent soil

ZHOU Hang1, 2, YUAN Jing-rong1, 2, LIU Han-long1, 2, CHU Jian3   

  1. 1. College of Civil Engineering, Chongqing University, Chongqing, 400450, China; 2. Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing, 400450, China; 3. School of Civil and Environmental Engineering, Nanyang Technology University, Singapore 639798, Singapore
  • Received:2018-09-06 Online:2019-11-11 Published:2019-12-01
  • Supported by:
    This work was supported by the National Science Foundation of China (51708063，51420105013).

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Abstract: The penetration effect of the rectangular pile is different from the conventional circular cross-section pile. However, conventional theoretical models and experimental techniques are not suitable for investigating the rectangular cross-section pile. Based on deformation visualization technique of transparent soil, this paper investigated the displacement field variation law induced by the rectangular pile. Experimental results show that after driving of rectangular pile, the soil displacement of the surrounding soil after installing a rectangular pile can be divided into two typical areas. A transition area is produced around the rectangular pile, where soil displacement is non-columnar symmetry characteristics, and its radius is around 4deq-5deq. The expansion area of the circular hole is located away from the pile, and its displacement presents the characteristics of cylindrical symmetry. According to pile driving compaction tests of the rectangular cross-section pile, this study proposed a modified cavity expansion mode for rectangular pile and verified the rationality of the modified model by comparing theoretical values with experimental data.

Key words: rectangular pile, displacement field, modified cavity expansion mode, transparent soil

CLC Number: 

  • TU 473
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