混凝土面板堆石坝设计规范（SL228-2013）.pdf

万方数据
上海交通大学硕士学位论文
基坑开挖对管线的影响及评价保护措施
摘要

随着我国城市化进程的进一步加加快,城市建设逐步向地下发展,
基坑开挖不可避免的对周围的土体产生干扰,从而影响周围的建筑物
及地下管线。地下管线被视为城市的生命线,故深入研究基坑开挖对
地下管线的影响及保护措施具有重要的理论和实践指导意义。
本文依托宁波轨道交通一号线的东环南站基坑工程,通过建立有
限元模型系统统研究了基坑开挖对地下管线位移和受力力的影响。主要的
研究内容有:
(1)通过对不同的土的本构模型进行对比比,结结合软土的流变特性,
选择 D-P 本构模型模拟基坑对施工地下管线的影响。
(2)分分析基坑开挖对管线的影响因素,主要有:管线与基坑的位
置置、土质、支撑撑情况及地连墙刚刚度,得到到相应的位移对比比曲线,为管
线的安全评估和保护措施提提供依据。
(3)对比比宁波轨道交通一号线的东环南站基坑工程模拟结结果和监
测数据的 4 组管线沉沉降值,检验模型的有效性,并分分析其原因。
I
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上海交通大学硕士学位论文
(4)归纳地下管线的安全判判别别标准、方法,判判别别分分析宁波轨道交
通一号线的东环南站基坑工程中管线的安全状况,并提提出出管线预保护
措施。
关键词:基坑开挖,地下管线,本构模型,有限元

II
万方数据
上海交通大学硕士学位论文
STUDY ON THE IMPACT ON THE PIPELIN OF
EXCAVATION OF FOUNDATION PIT AND THE
EVALUATION AND PROTECTION MEASURES

ABSTRACT

With the further acceleration of urbanization in China, underground
space development gains more attention in the urban construction,
Excavation of the foundation pit inevitably causes interference to its
surrounding buildings and underground pipelines. Underground pipeline is
regarded as the lifeline of a city, therefore, deep research in the impact of
underground pipelines due to excavation of the soil and the responding
protective measures has significant theoretical and practical significance.
Based upon the foundation pit project of the South East Outer Ring
Road Station of Metro Line 1 in Ningbo, through the establishment of the
finite element model, the paper is aimed to do a system study in the impact
on the underground pipeline’s displacement and force as a result of
excavation of the foundation pit .The prime contents of this research are as
follows:
(1) When different constitutive models of soil pared,
combined with soft soil rheology, the final choice is D-P constitutive
III
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上海交通大学硕士学位论文
model, which is used to simulate the impact of excavation of foundation
pit on the underground pipelines.
(2) Analyze the factors affecting pipeline’s pr