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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套的支护体系。而基坑围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。基坑围护体系是临时结构，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。为了保证既有十号线地铁线路的正常运营，工程建设过程中对施工引起的变形要求将变得极其的严格。本文主要以实际工程为研究背景，围绕围护结构的支护体系形式、基坑加固的类型，以及基坑的设计等方面，对上海轨道交通十号线动物园站的基坑进行设计，以期对今后从事类似工程建设提供参考和积累经验。本文先介绍了上海地铁十号线动物园站的工程概况，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。接下来通过土压力的计算、结构内力的计算，稳定性分析等对基坑的开挖支护作了理论上的数据分析。34029
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毕业论文关键词：基坑围护，地下连续墙，稳定性
Design of Shanghai Zoo Station Foundation Pit Enclosure Structure
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 has a strong regional. Excavation works under different hydrological environmental and geological conditions are vastly. Effects complex excavation, excavation pit is not only necessary to ensure their own safety，but also to effectively control the pit surrounding strata. In order to guarantee both the normal operations of the line 10 subway lines, the construction cause in the process of engineering construction will become extremely strict deformation. This article mainly to actual engineering as the research background, around the palisade structure form, the reinforcement of the foundation pit supporting system type, as well as the design of foundation pit, etc., of Shanghai rail transit line 10 zoo station foundation pit design, in order to provide reference in the similar engineering construction in the future and gain experience. First，the paper introduces the general engineering situation of Zoo Station，Including hydrological geology and the environment，Then，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, Analysis of maintenance
目录
1 概述 1
1.1 工程概况 1
1.2 水文地质工程地质条件 2
1.3 安全等级 4
1.3.1 基坑工程安全等级 4
1.3.2 支护结构安全等级 4
2 基坑支护结构概述和比选 5