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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置的基坑支护体系。而基坑支护就是为保证基坑在开挖、基础施工过程中能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支挡、加固与保护措施[1]。
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基坑支护体系是临时支护结构，安全性能较小，所具备的风险较大，基坑工程施工具有很强的地域性。不同的水文、工程地质环境条件下的基坑工程施工及其支护的差异很大。周边环境对基坑工程的影响较为复杂，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及保护周围施工环境。
本文先介绍了中山站的工程概况，包括水文地质和周边施工环境，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。下面通过基坑周边土压力的计算、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，最后根据相关规范检验此毕业设计及绘制相关计算图纸是否满足其要求。22441
毕业论文关键词：深基坑；支护设计；稳定性
Chengdu metro line 2 zhongshan road subway station
foundation pit excavation supporting design
Abstract:For the excavation of foundation pit engineering is below the surface of a
underground space and its supporting system configuration.And foundation pit supporting is to
ensure the smooth progress of foundation pit excavation, foundation construction and the safety
of the surrounding environment of foundation pit, the pit wall and the surrounding environment
of the retaining and reinforcement and protection measures.
Foundation pit supporting system is a temporary structure, and safety of a smaller reserve
has a bigger risk, foundation pit engineering has a strong regional. Different hydrological and
engineering geological conditions of foundation pit engineering is a big difference.
Environment effect of complex foundation pit engineering, foundation pit excavation is not
only to ensure the security and stability of foundation pit itself, but also effectively control
foundation pit surrounding strata movement and protect the surrounding environment.
This article first introduces the general situation of the engineering zaoyuan station,
including hydrological geology and the surrounding environment, and then by combining the
method and the actual situation of the existing excavation support more choose a suitable site of
the excavation support scheme.
Through his pressure under the internal force calculation, structure calculation,
reinforcement, calculation, support design and deformation estimates for the excavation of
foundation pit supporting the theory of data analysis, finally, each working procedure is
illustrated by construction organization construction method and some problems that should be
paid attention to.
Key words: deep foundation, maintenance of deep foundation, supporting design
stability 目 录
1 绪 论 . 1
1.1 深基坑发展的现状及趋势 1
1.2 研究意义及目的 2
1.3 文献综述 2
1.4 深基坑支护设计理论及计算方法研究现状 3
1.4.1 极限平衡法 .. 3
1.4.2 土抗力法 .. 3
1.4.3 有限元分析法 .. 4
2 前 言 . 5
3 工程概况 ... 6
3.1 工程简介 .. 6
3.2 工程地质与水文条件 .. 6
3.2.1 工程地质条件 6
3.2.2 水文地质条件 7
3.2.3 特殊地质条件 7
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