相邻水平平行顶管推进引起的附加荷载分析

›› 2006, Vol. 27 ›› Issue (11): 1992-1996.

相邻水平平行顶管推进引起的附加荷载分析

魏纲，魏新江

浙江大学城市学院土木工程系，杭州 3100150

收稿日期:2004-01-24 出版日期:2006-11-10 发布日期:2013-12-04
作者简介:魏纲，男，1977年生，工学博士，主要从事软土地基处理与顶管、盾构施工对周边环境影响的研究工作。

Analysis of superimposed load induced by propulsion of adjacent level parallel pipe-jacking

WEI Gang, WEI Xin-jiang

Department of Civil Engineering, Zhejiang University College City, Hangzhou 310015, China

Received:2004-01-24 Online:2006-11-10 Published:2013-12-04

摘要/Abstract

摘要： 利用弹性力学的Mindlin解，推导得到顶管正面附加推力、掘进机和后续管道与土体之间的摩擦力在相邻水平平行管道上引起的附加荷载计算公式。探讨了管道净间距、直径、埋深以及土体泊松比对附加荷载分布的影响。分析结果表明，采取注浆措施时后续管道摩擦力在相邻管道上产生较小的压力，其峰值出现在开挖面后方。在正常施工时，正面附加推力引起的附加荷载非常小，使相邻管道开挖面前方产生压力、后方产生拉力，以开挖面呈反对称分布。掘进机摩擦力引起的附加荷载分布规律与正面附加推力相似，但零点位于掘进机中间部位相对应处，其引起的附加荷载较大，在三者共同作用中占主要地位，应予以重视。

关键词: 平行顶管, 正面附加推力, 摩擦力, Mindlin解, 附加荷载

Abstract: The computing formulas of superimposed load on adjacent level parallel pipe induced both by bulkhead additive thrust, force of friction between shield and soil, and force of friction between follow-up pipes and soil are derived from the Mindlin solution in elastic mechanics. The influences of pipe net spacing distance, pipe diameter, buried depth and soil’s Poisson ratio on the distribution of superimposed load are discussed. The analytical results show that the pressure on adjacent level parallel pipe induced by force of friction between follow-up pipes and soil is small during injecting slurry; and the peak value appears at the back of excavation face. When construction is in normal, superimposed load induced by bulkhead additive thrust is very small. For adjacent level parallel pipes, pressure is produced in front of excavation face while pull force at the back. They distributed antisymmetrically with the axes of excavation face. Superimposed load induced by force of friction between shield and soil and is much larger than that of bulkhead additive thrust with its “zero point” at the middle of shield. The force of friction between shield and soil plays a leading role, thus, it should be considered highly during construction.

Key words: parallel pipe jacking, bulkhead additive thrust, force of friction, Mindlin solution, superimposed load

中图分类号:

TU 431

魏纲，魏新江. 相邻水平平行顶管推进引起的附加荷载分析[J]. , 2006, 27(11): 1992-1996.

WEI Gang, WEI Xin-jiang. Analysis of superimposed load induced by propulsion of adjacent level parallel pipe-jacking[J]. , 2006, 27(11): 1992-1996.

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