上海交通大学学报

上海交通大学学报 ›› 2011, Vol. 45 ›› Issue (10): 1493-1497.doi: 10.16183/j.cnki.jsjtu.2011.10.015

所属专题： 王建华教授学报发文专辑

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大直径砼顶管的管道受力特性分析

雷晗1(), 陈锦剑1, 王建华1(), 朱熊2   

  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

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摘要：

为优化现有的顶管管道受力模式及其设计方法，结合上海市污水治理南线工程，采用数值模拟方法，对内径4 m的大直径钢筋混凝土顶管管道的受力特性进行了分析，研究了施工过程中管土接触压力的变化及顶管覆土厚度对管道外土压力的影响，比较了管道受力分布与《给水排水工程顶管技术规程》的区别，并分析了管道内力的差异．计算结果表明：土拱效应随覆土厚度的增加逐渐增强，管土接触压力分布比较平均，侧向土压力采用主动土压力计算偏于保守，地基反力也可适当均匀化，并且在此基础上的管道弯矩减小，轴力相应增大．因此，管道设计可以进一步优化，使工程更加经济．

关键词: 顶管, 大直径, 土拱效应, 受力模式, 数值模拟

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.

Key words: jacking pipe, large diameter, soil arch effect, load model, numerical simulation

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