文档介绍：华中科技大学
硕士学位论文
复合地层中盾构隧道施工的环境效应研究
姓名:蒲诃夫
申请学位级别:硕士
专业:岩土工程
指导教师:郑俊杰
2010-05-26
摘要
当盾构隧道在复合地层中穿越构筑物密集区域时,盾构掘进引起的环境效应是不
容忽视的。探讨复合地层中盾构隧道施工对周边环境的影响规律,寻求有效的变形控
制措施具有重要的工程实际意义。本文以广佛地铁菊村~西朗盾构区间隧道为背景,
对复合地层中盾构掘进引起的环境效应进行了分析研究。
首先,以广佛地铁下穿西朗总站车库部分为背景,采用三维数值模拟方法分析了
盾构掘进对邻近桩基的影响规律,并对桩基托换加固措施的沉降控制效果进行了深入
的参数分析。结果表明:盾构掘进对紧邻上部桩基的影响是比较显著的,必要时可进
行桩基托换来有效地减小桩基沉降。托换桩桩长与既有桩基沉降呈非线性关系。
然后,以广佛地铁下穿珠江水产研究所部分为背景,采用三维数值模拟的方法分
析了含淤泥地层中盾构掘进对地层变形的影响规律。结果表明:含淤泥地层中,地表
沉降持续时间较长,影响范围较广。
最后,以广佛地铁下穿广州地铁 1 号线部分为背景,采用三维数值模拟方法探讨
了盾构隧道施工对既有铁路线的影响规律。结果表明:铁路线的存在对地表沉降的影
响并不大,但会影响到铁路所在位置土体的侧向变形。
本文的研究成果对于在构筑物密集地区进行盾构隧道建设具有重要的参考价值。

关键词:盾构隧道复合地层邻近桩基桩基托换既有铁路线附加响应
I
Abstract
When constructing tunnels in urban areas, the influence of shield tunneling on
surrounding environment is an important issue. It has great engineering significance to find
out the mechanism of the additional responses of surrounding environment induced by
tunneling and seek the effective measures to control ground movements and structures’
responses. On the basis of Jushu-Xilang Section of Guangzhou-Foshan Metro, this thesis
studies the environmental effect of shield tunneling plex soil strata.
Firstly, when Guangzhou-Foshan Metro underneath passes through the pile
foundations of Xilang Station, three-dimensional elasto-plastic numerical simulation models
are established to study the tunneling-induced ground movement and deformation of
adjacent pile foundations. The strengthening effects of underpinning scheme and its
parametric studies are also carried out. The results show that plex soil strata, the
influence of tunneling on adjacent pile foundations is obvious and it, when necessary, could
be effectively reduced by underpinning. The relationship between length of underpinning
pile and settlement of existing piles is found to be nonlinear.
Secondly, when Guangzhou-Foshan Metro underneath passes through the existing
buildings and other structures of Zhujiang Aquatic P