摘要  进入21世纪后，我国经济的快速发展和逐渐开放的人口政策导致城市人口急剧增多，城市化的不断推进，对城市发展带来的交通压力越来越大。基坑工程是目前城市建设重要组成部分，基坑设计和施工技术成为众人瞩目的问题。本文以上海轨道交通2号线某基坑为设计对象，采用地下连续墙设计方案系统计算了各种参数，如抗倾覆安全系数、抗滑移安全系数、整体稳定性系数、坑底抗隆起计算系数、地表沉降计算等。在规范要求的计算上进行配筋计算，随后采用AutoCAD绘图软件绘制总平面布置图、地下连续墙配筋图、施工步骤图、等施工所需的设计图纸。

通过此基坑的围护、支撑以及施工设计，充分地运用和发挥了基坑设计的相关理论知识，为今后实际进行基坑工程的相关设计提供一定的实践经验和技术实例。69801

毕业论文关键词： 基坑；地下连续墙；整体稳定性；抗倾覆；抗滑移

The design of a foundation pit of Shanghai rail transit design

Abstract： After entering the twenty-first century, China's rapid economic development and population liberalization policy gradually open, leading to a sharp increase in urban population, urbanization process accelerated, urban development, traffic pressure is growing. Foundation pit engineering is an important part of urban construction, foundation pit design and construction technology to become high-end people. A Demonstration of a Foundation Pit in Shanghai Rail Transit Line. 2 as the design object, the design of the underground continuous wall system is calculated by the various parameters such as the safety factor of the resistance type, the safety factor of the anti-skid safety, the overall stability coefficient, the pile uplift resistance coefficient and the surface settlement calculation. Requires the calculation of reinforcement calculation, and then use AutoCAD drawing software rendering general layout, underground continuous wall reinforcement map, map Construction procedure

From the foundation pit enclosure facilities, design and construction, make full use of and play the basic design of the relevant theoretical knowledge for the future design of the actual experience of foundation pit engineering to provide some technical examples

Key words：Foundation pit; The underground continuous wall; Overall stability; Resistance to capsize; Slip resistanc

目 录

1 引言 1

1 工程概况 4

2设计依据和标准设计 5

3基坑围护方案设计 6

3.1基坑维护方案 6

 3.1.1 钢板桩 7

3.1.2 钻孔灌注桩 7

3.1.3地下连续墙 8

3.1.4 SMW工法 8

3.2基坑围护结构方案比选 8

4 基坑支撑方案设计 9

4.1 支撑结构类型 9

4.2 支撑体系的布置形式 9

4.3支撑体系的方案比较和合理选定 9

4.3.1支撑材料和类型 10

4.3.2支撑道数 10

4.3.3支撑体系的平面布置 10

4.3.4支撑立柱桩 10

4.4支撑体系的布置形式 10

5.设计计算书