Journal of Jilin University(Earth Science Edition) ›› 2021, Vol. 51 ›› Issue (6): 1789-1800.doi: 10.13278/j.cnki.jjuese.20210099

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Stress and Deformation Analysis of Assembled Recoverable Support and Pile Anchor Support Structure in Foundation Pit

Yu Li1,2, Zhang Yu1, Wang Weiyu2, Han Zihao1, Zhao Tuo2   

  1. 1. School of Civil Engineering, Hebei University, Baoding 071000, Hebei, China;
    2. Hebei Construction Research Institute Co., Ltd, Shijiazhuang 050000, China
  • Received:2021-04-20 Online:2021-11-26 Published:2021-11-24
  • Supported by:
    Suppored by the Project of Innovation Ability Training for Graduate Students in the Department of Education of Hebei University (HBU2021ss029),the Post Doctoral Program of Human Resources and Social Security Department (B2020003028) and the Natural Science Foundation of Hebei Province Youth Fund Project (E2020201013)

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Abstract: Foundation pit support engineering plays an important role in the process of urbanization in China. The emergence of some new support forms has greatly enriched the diversity of foundation pit support. In this paper, by taking the Hengshui field foundation pit support experiment project as the background, the prefabricated recyclable support structure and pile-anchor support structure are studied; By using the finite element software PLAXIS3D, the constitutive model parameters are determined through indoor geotechnical test data, and the three-dimensional finite element model is established. Further, the process of foundation pit excavation and support is simulated, and the stress and deformation of foundation pit soil and support structure characteristics are analyzed. Through comparing the stability of the assembled recyclable support structure and the pile-anchor support structure under the same soil and excavation conditions, the following conclusions are obtained:The assembled recyclable deep foundation pit support form can not only better control the soil uplift deformation, which is more conducive to limit the displacement of deep soil, but also can better control the horizontal displacement of the pit top. The fabricated support structure is simple, quick in construction, recyclable, and conforms to the concept of green building in China.

Key words: assembled support, pile anchor support, numerical simulation, stability comparative analysis

CLC Number: 

  • P59
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