顶管推进引起施工场地竖向附加荷载分析

›› 2014, Vol. 35 ›› Issue (S2): 121-128.

顶管推进引起施工场地竖向附加荷载分析

张治国^{1, 2, 3}，张孟喜³，王卫东⁴

1.上海理工大学环境与建筑学院，上海 200093；2.中国矿业大学深部岩土力学与地下工程国家重点实验室，江苏徐州 221116； 3.上海大学土木工程系，上海 200072；4.华东建筑设计研究院有限公司，上海 200002

收稿日期:2014-01-16 出版日期:2014-10-31 发布日期:2014-11-12
作者简介:张治国，男，1978年生，博士后，副教授，硕士生导师，主要从事地下工程施工对周围环境影响评估方面的教学与研究。
基金资助:
国家自然科学基金（No. 51008188，No. 41172238）；深部岩土力学与地下工程国家重点实验室基金（No. SKLGDUEK1205）；中国博士后科研基金（No. 201104266）。

Analysis of soil vertical additional loads induced by pipe jacking construction

ZHANG Zhi-guo^1,2,3, ZHANG Meng-xi³, WANG Wei-dong⁴

1. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China; 2. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; 3. Department of Civil Engineering, Shanghai University, Shanghai 200072, China; 4. East China Architecture Design Institute, Shanghai 200002, China

Received:2014-01-16 Online:2014-10-31 Published:2014-11-12

摘要/Abstract

摘要： 基于层状体系解析刚度矩阵理论解，结合5节点Gauss-Legendre求积公式，提出了层状地基中顶管施工正面附加推力、掘进机与土体之间摩擦力以及共同作用力引起的附加荷载计算方法，分析了顶管推进引起的土体竖向附加荷载分布规律，也研究了地基等效均质性、土层力学参数、计算点间距以及顶管埋深等因素对顶管施工诱发附加荷载的影响效应。研究结果表明，掘进摩擦力引起的附加荷载在掘进面前方迅速达到压应力峰值，其量值大小和影响范围均要大于正面附加推力，是顶管施工引起临近地层附加荷载的主要影响因素。此外，层状地基土体参数的改变会对顶管施工扰动地层的附加荷载产生一定影响，地基等效均质性、计算点间距以及顶管埋深等因素对附加荷载大小及分布均存在显著影响。成果可为合理制定顶管开挖对周围土工环境的保护措施提供一定理论依据，也可为其他盾构隧道工程提供一定的理论参考。

关键词: 顶管施工, 层状地基, 竖向附加荷载, 影响因素, 解析刚度矩阵解

Abstract: Based on the analytical stiffness matrix solution for layered soil, the calculated method for additional loads induced by the pipe bulkhead additional pressure, and the propulsion friction force between the shield and surrounding soil, and the interaction forces, is derived by means of five-node Gauss-Legendre integral arithmetic. The distribution rule for vertical additional loads induced by pipe jacking construction is analyzed. Furthermore, the influences of equivalent uniform characteristics, soil mechanical parameters, spacing distance for calculation point, and pipe buried depth on additional loads are discussed. The research results show that the peak compressive stress is rapidly achieved ahead by the shield opening according to the additional loads due to the friction force. The value and influence scope of propulsion effects due to the friction force is more obvious than that due to bulkhead additional pressure. The friction force is the main influence factor of additional loads induced by pipe jacking. In addition, the change of layered soil parameters will lead to a certain extent impact on additional loads. The equivalent uniform characteristics, spacing distance for calculation point, and pipe buried depth have distinct influences on the magnitude and distribution of additional loads. The results may provide certain basis to draw up correctly protective measurements of geotechnical environments influenced by pipe jacking construction. The research results can also provide theoretical references to the other projects such as metro tunnel engineering.

Key words: pipe jacking, layered soil, vertical additional load, influence factor, analytical stiffness matrix solution

中图分类号:

U 45

张治国，张孟喜，王卫东,. 顶管推进引起施工场地竖向附加荷载分析[J]. , 2014, 35(S2): 121-128.

ZHANG Zhi-guo , ZHANG Meng-xi , WANG Wei-dong,. Analysis of soil vertical additional loads induced by pipe jacking construction[J]. , 2014, 35(S2): 121-128.

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