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### 大直径砼顶管的管道受力特性分析

1. 1.上海交通大学土木工程系，上海 　200240
2.上海市政工程设计研究总院，上海 　200092
• 收稿日期:2010-10-25 出版日期:2011-10-01 发布日期:2011-10-31
• 作者简介:雷晗（1987-)，男，湖北随州市人，硕士生，主要研究方向为岩土工程数值分析．E-mail: leihansjtu@gmail.com.|王建华（联系人），男，教授，博士生导师，电话（Tel.): 021-629329150; E-mail: wjh417@sjtu.edu.cn.

### Analysis on Performance of Large Diameter Concrete Jacking Pipe

LEI Han1(), CHEN Jin-jian1, WANG Jian-hua1(), ZHU Xiong2

1. 1.Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China
2.Shanghai Municipal Engineering Design General Institute, Shanghai 200092, China
• Received:2010-10-25 Online:2011-10-01 Published:2011-10-31

Abstract:

The load model and its design method of a pipe are to be improved. Based on the South Line project of sewage treatment in Shanghai, the performance of inner diameter of 4 m jacking pipe was studied by numerical simulation. The variation of contact pressure between pipe and soil during construction was analyzed, and the influence of covering soil depth was then discussed. The differences of the load model from "the technical specification for pipe jacking of water supply and sewerage engineering" were researched, and the differences of the internal forces were compared. The results show that soil arch effect is strengthened with increasing of cover soil depth, while the distribution of contact pressure is more uniform than the codes. Therefore, the active earth pressure is conservative to calculate lateral pressure, and the subgrade reaction could be also more uniformed. The bending moment of pipe will decrease while the axis force increase if the load model is improved, which would optimize the design method of pipe.