宁波软土建筑基坑工程围护设计+图纸
毕业论文关键词: 基坑；钻孔灌注桩；轻型井点；
The maintenance design of building foundation pit engineering in soft soil
Abstract：this graduation project is to designed foundation pit support project of typical conditions soft land in ningbo，According to the current national norms 《Technical specification for building excavation》（JGJ120-99），with the research of geological and hydrological data conditions，we are going to Analysis the comparison of Excavation scheme,calculation of earth pressure,design of supporting structure ,analysis of Foundation stability.analysis the Bored in excavation of Soft soil area. we chose Bored as supporting structure by comparing, Excavate with the open-cut method.using light dewatering before excavation,Comprehensive monitoring Throughout the construction process to ensure success. the main princple of this design to ensure the safe and reliable,convenient,make all the project economic
Keywords: The foundation pit; Drill-grouting pile; Bolt; Light well point
目录
1 绪论 1
1.1 研究背景 1
1.2 研究现状 1
1.3 发展趋势 1
2 基坑工程概况 2
2.1 工程概况 2
2.2 地质条件 2
2.2.1 工程地质条件 2
2.2.2 水文地质条件 3
2.3 基坑支护方案选择 4
2.3.1 基坑支护设计要求 4
2.3.2 基坑支护方案选择 4
2.3.3 基坑支护选型小结 6
2.4 基坑开挖方案选择 7
2.4.1 明挖法 7
2.4.2 浅埋暗挖法 8
2.4.3 盖挖法 8
2.4.4 基坑开挖方案小结 9
3 设计计算 10
3.1 设计依据 10
3.1.1 基坑工程等级 10
3.1.2 工程勘察资料 10
3.1.3 相关参数取值 11
3.1.4 地下水的影响 11
3.2 参数加权平均计算 12
3.3 土压力计算 14
3.4 用等值梁法计算弯矩 16
3.5 钻孔灌注桩配筋计算 19
4 基坑稳定性分析 22
4.1 整体稳定性验算 22
4.2 抗隆起稳定验算 22
4.3 抗渗流稳定验算 24
4.4 踢脚稳定性验算 25
4.5 小结 25
5支撑设计 26
5.1 围檩设计 26
5.2 支撑设计 27
5.3 立柱设计 28
5.4 小结 28