论文总字数：27863字

摘 要

论文作者签名：贾立夏 导师签名：丁建文 日期：2019.5.29

复杂环境下轨道交通施工建设风险辨识与管控分析

21815141 贾立夏

指导教师 丁建文 副教授

摘要

随着科学技术的显著提高和经济的高速发展，我国许多城市都建设或规划建设城市交通轨道，希望依托经济发展-发展交通-经济发展的发展闭环进一步推动城市建设。伴随着城市轨道交通的建设，各种问题随之出现，因为各城市地质环境、周边环境的重大差异，在施工过程中出现的问题也各不相同，能借鉴的工程经验也相对较少，严重影响了工程难度和经济投入。而全方位的风险管控管理的出现逐渐解决了部分问题，基于此，本文依托对南通工程实例的分析，对复杂环境下城市轨道交通建设施工风险进行辨识，并通过模拟数据提出基坑和盾构施工对周边环境风险影响的简单标准和预警体系。

本文使用功能强大的有限元分析软件PLAXIS 8.5软件进行建模，通过有限元分析的方法研究了基坑开挖和盾构掘进引起的周边建筑物位移的情况。通过多个模型中数据的交叉分析，探究了几种典型环境下的施工影响。最后，将计算结果与实测数据进行了验证，提出对同类型施工条件下的工程施工影响的简单风险标准。

关键词：城市轨道；复杂环境；有限元分析；风险管控

Risk identification and control analysis of rail transit construction under complex environment

21815141 Jia Lixia

Supervised by Ding Jianwen

Abstract

With the remarkable improvement of science and technology and the rapid development of economy, many cities in China have built or planned to build urban transit, hoping to further promote urban construction by relying on the closed loop of economic development -- development of transportation -- economic development.

With the construction of urban rail transit, various construction problems have emerged. Due to the significant differences in the geological environment and surrounding environment of various cities, the problems in the construction process are also different, and there are relatively few engineering experiences that can be used for reference, which seriously affects the difficulty and economic investment of the project.

And a full range of the emergence of risk control management gradually solve the part of the problem, based on this, this article relying on the analysis of nantong engineering example, the complicated circumstances of urban rail transit construction risks are identified, and through the simulation data of foundation pit and shield construction simple standards and influence on surrounding environment risk early warning system.

In this paper, PLAXIS 8.5, a powerful finite element analysis software, is used for modeling. Through its finite element grid calculation function, the finite element analysis of the displacement of surrounding buildings is carried out to study the change of the displacement of surrounding buildings in the foundation pit and shield section.

Through cross-analysis of data in multiple models, the construction impact in several typical environments is explored.

Finally, combining the simulated data with the actual data, the simple risk criteria for the influence of the same type of construction conditions on the project construction are proposed.

Key words: Urban rail; Complex environment; Finite element analysis; Risk control

目 录

摘要 I

Abstract II

第一章 绪论 1

1.1研究现状简介 1

1.1.1基坑施工对周边环境影响 1

1.1.2盾构施工对周边环境影响 2

第二章 风险评估的理论基础 4

2.1评估的目的与依据 4

2.1.1风险评估的目的 4

2.1.2风险评估的依据 4

2.2评估的对象与范围 5

2.3评估程序与方法 6

2.3.1评估程序 6

2.3.2风险识别与估计方法 6

2.4风险分级标准与接收准则 6

2.4.1工程自身风险分级标准 6

2.4.2环境设施风险分级标准 8

2.4.3风险接受准则 12

第三章 有限元分析软件 13

3.1PLAXIS 8.5软件简介 13

3.2 PALXIS 8.5功能介绍 13

第四章 工程实例研究-南通环西文化广场站 15

4.1工程概况 15

4.1.1 工程地质概况 15

4.1.2水文地质概况 17

4.1.3场地环境条件 18

4.2 供销大厦影响分析 19

4.2.1模型建立 20

4.2.2 有限元计算结果 20

4.2.3实测数据 22

4.3南通电视塔影响分析 23

4.3.1模型建立 23

4.3.2有限元计算结果 24

4.4本章结论 25

4.4.1有限元模拟分析 25

4.4.2实测数据分析 26

第五章 工程实例研究-南通环环盾构区间 27

5.1工程概况 27

5.1.1工程地质概况 27

5.1.2水文地质概况 28

5.1.3环境场地条件 28

5.2濠河和平桥箱涵影响分析 29

5.2.1模型建立 30

5.2.2有限元计算结果 30

5.3交通银行裙楼影响分析 31

5.3.1模型建立 31

5.3.2有限元计算结果 32

5.4本章结论 33

第六章 结论与展望 34

6.1主要结论 34

6.1.1基坑施工 34

6.1.2盾构施工 35

6.2前景展望 35

参考文献 37

致 谢 39

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