（完整版）深基坑开挖支护设计毕业论文

毕业设计（论文）

题 目西安地铁枣园站基坑 开挖支护设计 专 业 城市地下空间工程 班 级 城地 081 学 生 张鹏飞 指导教师 范留明 教授

2012 年

摘 要

基坑工程是指在地表以下开挖的一个地下空间及其配套的支护体系。而基坑支护就是为保证基坑开挖，基础施工的顺利进行及基坑周边环境的安全，对基坑侧壁以及周边环境采用的支挡，加固与保护措施。

基坑支护体系是临时结构，安全储备较小，具有较大风险，基坑工程具有很强的区域性。不同水文，工程地质环境条件下基坑工程的差异很大。基坑工程环境效应复杂，基坑开挖不仅要保证基坑本身的安全稳定，而且要有效的控制基坑周边地层移动以及保护周围环境。

本文先介绍了枣园站的工程概况，包括水文地质和周围环境，然后通过结合对现有基坑开挖支护工法和车站实际情况的比较选择出了适合本站的开挖支护方案。下来通过土压力的计算、结构内力的计算，配筋、验算、支撑设计、变形估算等对基坑的开挖支护作了理论上的数据分析，最后通过施工组织说明了各个工序施工的工法和应注意的问题。 关键词：支护方案，地下连续墙，支撑，施工组织设计

Abstract

Foundation Pit is the excavation of an underground space below the surface and a coordinated support system. Bracing of foundation pit is to ensure that excavation and foundation construction for the smooth and safe environment Foundation Pit and used the pit retaining wall reinforcement and protection. Bracing of Foundation Pit structure is the structural safety of temporary reserves are smaller, more risk. Foundation pit structure works under different , excavation pit is not only necessary to ensure their own safety，but also to effectively control the pit surrounding strata.

First，the paper introduces the general engineering situation of Zaoyuan Station，Including ，based on the existing foundation pit excavation method and station actual situation select the suitable for the station of the excavation and support scheme。And then， through the soil pressure calculation, structure calculation,

reinforcement,

checking,

support

design,

deformation estimation ，then made a theoretical analysis of the data for the excavation of foundation pit supporting。Finally ， through

the

construction

organization

describes

the

construction process of the method and the problem which should be noted.

KEY WORDS: Supporting scheme, the Underground continuous wall, Support, Construction organization design