Analysis of Excavation and Support of Prefabricated Returnable Double-row Piles Support Structure
[1]GUO Chengchao,ZHU Chuanxin.Analysis of Excavation and Support of Prefabricated Returnable Double-row Piles Support Structure[J].Journal of Zhengzhou University (Engineering Science),2022,43(02):78-83.[doi:10.13705/j.issn.1671-6833.2022.02.009]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
43卷
Number of periods:
2022 02
Page number:
78-83
Column:
Public date:
2022-02-27
- Title:
- Analysis of Excavation and Support of Prefabricated Returnable Double-row Piles Support Structure
- Keywords:
- double-row pile; prefabricated recycled; excavation of foundation pit; displacement of pile; finite element
- CLC:
- TU753
- DOI:
- 10.13705/j.issn.1671-6833.2022.02.009
- Abstract:
- In order to investigate the supporting capacity of the new prefabricated recyclable double-row pile supporting structure,the ABAQUS finite element calculation software was used to analyze and study the excavation process of the foundation pit in the urban village reconstruction plan in a certain area of Zhengzhou City, Henan Province. The corresponding structural parameters were used to construct a new supporting system of front-row piles, back-row piles, connecting beams and plates, a new three-dimensional double-row pile support model was established for the foundation pit, and the excavation process of the foundation pit and support process of the supporting structure were simulated. The Mises stress and displacement deformation of the supporting pile and connecting beam was calculated in the structure. Based on the test results, it is shown that as the excavation depth of the foundation pit increased, the front-row piles and the back-row piles were similar in the deformation form of the new fabricated recyclable support structure, the upper part of the pile was relatively large in force and deformation, and the maximum deformation of the pile would move down with the excavation depth, the connecting beam could better coordinate the deformation of the front-row piles and the back-row piles during the excavation process, and effectively transfer the force of the front-row piles to the back-row piles for common force. During the excavation of the foundation pit up to 12 m, the maximum deformation of the connecting beam was less than 5 mm. At the same time, the establishment process of the foundation pit support model was introduced in detail in terms of the selection of model parameters, the establishment of analysis steps and the setting of boundary conditions, which would provide a reference for further improving the model in the future.
- References:
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Last Update:
2022-02-25