[1]郭成超,朱传鑫.装配式可回收双排桩支护结构的开挖支护分析[J].郑州大学学报(工学版),2022,43(02):78-83.[doi:10.13705/j.issn.1671-6833.2022.02.009]
　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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装配式可回收双排桩支护结构的开挖支护分析()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
43
期数:
2022年02期
页码:
78-83
栏目:
出版日期:
2022-02-27

文章信息/Info

Title:
Analysis of Excavation and Support of Prefabricated Returnable Double-row Piles Support Structure
作者:
郭成超; 朱传鑫
郑州大学水利科学与工程学院;水利与交通基础设施安全防护河南省协同创新中心;重大基础设施检测修复技术国家地方联合工程实验室;

Author(s):
GUO Chengchao1; 2; 3;  ZHU Chuanxin1; 2
1.School of Water Conservancy Engineering，Zhengzhou University， Zhengzhou 450001， China; 
2.Collaborative Innovation Center of Water Conservancy and Transportation Infrastructure Safety, Zhengzhou 450001, China; 
3.National Local Joint Engineering Laboratory of Infrastructure Testing and Rehabilitation Technology, Zhengzhou 450001, China
关键词:
Keywords:
double-row pile;  prefabricated recycled;  excavation of foundation pit;  displacement of pile;  finite element
分类号:
TU753
DOI:
10.13705/j.issn.1671-6833.2022.02.009
文献标志码:
A
摘要:
随着城市地下空间技术的快速发展，地下空间开发利用的需求日趋扩大，从而推动了基坑工程的发展。双排桩支护体系具有施工简单、抗变形能力强等诸多优点，传统的双排桩体系自重大、不能进行重复使用。为了解装配式可回收双排桩的支护能力，本文利用ABAQUS有限元软件，针对河南省郑州市某地区城中村改造计划的土地基坑开挖过程，建立了三维的新型基坑支护体系，模拟了基坑的开挖以及双排桩支护结构的支护过程，分析了双排桩桩体在不同开挖步完成后支护的变形，计算了支护结构的弯矩、剪力和应力。得出新型的装配式可回收基坑支护体系稳定性好，具有较好的应用前景。
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.

参考文献/References:

[1] 崔宏环,张立群,赵国景.深基坑开挖中双排桩支护的三维有限元模拟[J].岩土力学,2006,27(4):662-666.

[2] 刘亮光.深基坑斜撑与双排桩结合支护的数值模拟分析[D].郑州:郑州大学,2017.

更新日期/Last Update: 2022-02-25