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摘要：随着经济的快速发展，城市化步伐的加快，城市建设的不断完善，改造开发大型地下空间已经成为现代城市建设的一种必然趋势。自20世纪90年代以来，基坑工程的设计理论和施工技术已经较为成熟，这其中涌现了大量符合我国实际工程水文地质条件的基坑支护方法。正是在这样的背景下，本次设计的任务就是对上海城市轨道交通的一个车站进行基坑围护结构的设计研究以及相关设计计算。本课题主要围绕上海地铁国权路站进行基坑围护结构设计，根据基坑的水文地质工程地质条件和周边环境情况，进行支护方案的比选，最终确定围护结构采用地下连续墙，支撑体系采用钢支撑，并进行基坑的整体稳定性、抗倾覆稳定性、坑底抗隆起稳定性和抗渗流稳定性验算，结合启明星软件对于支护结构进行内力计算，完成围护结构的内力计算及配筋。然后进行支撑设计、基坑变形估算、基坑土体加固设计、基坑降水设计和基坑防水设计。37165
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毕业论文关键词： 城市轨道交通；基坑工程；地下连续墙；钢支撑
Design of Shanghai Metro Guoquan Road Station Foundation Pit Enclosure Structure
Abstract: With the rapid economic development, accelerate the pace of urbanization, and constantly improve the urban construction, renovation and development of large underground space has become an inevitable trend of modern urban construction. Since the 1990s, the design theory and construction technology of excavation has been more mature, which emerged a large number of excavation method hydrogeological conditions in line with our actual projects. It is in this context that this task is to design a station for Shanghai urban rail transit design and research foundation conducted envelope and related design calculations. The main topic around Shanghai metro Guoquan road station foundation pit design, based on engineering geological conditions and hydrogeological environmental conditions surrounding the pit, supporting scheme comparison and selection, and ultimately determine the envelope using underground continuous wall, support system of steel supports, and the overall stability of foundation, overturning stability, against basal heave stability and anti-seepage stability computations, with Venus software support structure for the calculation of internal forces, complete building envelope calculation of internal forces and reinforcement. Then support the design, pit deformation estimate, excavation soil reinforcement design, foundation pit precipitation design and waterproof design.
Keywords: metro; foundation pit engineering; underground continuous wall; steel support
目录
1 绪论 1
1.1 工程概况 1
1.2 水文地质工程地质条件 1
1.3 安全等级 3
1.3.1 基坑工程安全等级 3
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
2.1 基坑支护结构概述 5
2.2 基坑围护结构概述 5
2.2.1 土钉墙 5
2.2.2 水泥土重力式围护墙 5
2.2.3 地下连续墙 5
2.2.4 灌注桩排桩围护墙 6
2.2.5 型钢水泥土搅拌墙 6
2.2.6 钢板桩围护墙 6
2.2.7 钢筋混凝土板桩围护墙 6
2.3 基坑围护结构方案比较 7
2.4 基坑围护结构方案选择 7