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摘要工程为南京市燕子矶中学教学楼基坑开挖工程，基坑围护结构型式采用灌注桩。该项目位于学校道路以西、办公楼以北，西邻体育场。拟建物为一栋地下两层层（设3层停车场）框架结构，建筑最大开挖深度约为8.00m,为二级基坑。
结合本工程地质、环境、挖深等诸多因素确定安全可靠的支护方案——灌注桩，它是一种边坡稳定式的支护，是指在工程现场通过机械钻孔、钢管挤土或人力挖掘等手段在地基土中形成桩孔，并在其内放置钢筋笼、灌注混凝土而做成的桩，它是起主动嵌固作用，增加边坡的稳定性，使基坑开挖后坡面保持稳定。51236
本设计首先对基坑工程做了一定的概述，然后对本设计的围护体系进行了详细的计算与设计，其中主要对土压力的计算、最大弯矩的计算、桩长的计算以及边坡稳定性验算等。
毕业论文关键词：深基坑；灌注桩；结构计算；稳定性验算
Abstract Construction of excavation of Nanjing Yanziji middle school teaching building foundation pit.The pit retain structure cast-in-place piles.The project is located in the North West of the school road, office building, next to the stadium.The building for an underground two layers (3 layers of parking) frame structure, the building maximum excavation depth is about 8.00m, two pit.
Combined with the engineering geology, environment, dig deep factors determine safe and reliable supporting scheme -- pile.It is a kind of slope stability of the support.That refers to the project site by mechanical drilling, steel pipe soil compaction or human mining methods to fa pile hole in the foundation soil, and in its place reinforcement cage, pouring concrete piles and made.It is actively fixed effect, increase the slope stability, the excavation slope stability.
This design first made certain summary of foundation pit engineering, and then were calculated and designed in detail on the supporting structure of the design, including the calculation of soil pressure, the maximum bending moment calculation, the length of the pile and slope stability checking calculation.
Keyword : deep foundation pit ；caisson pile；structural calculation；Stability checking
目 录
第一章 燕子矶中学地下车库基坑设计综合说明 1
1.1 工程概况 1
1.1.1 结构概况 1
1.1.2 基坑周边环境 1
1.1.3 工程地质概况 1
1.1.4 水文地质条件 4
1.2 基坑支护结构设计概况 5
1.2.1 设计依据 5
1.2.2 支护方案选择 5
1.2.3 排、降水设计 7
第二章 设计所选支护方式简介 8
第三章 基坑支护结构设计计算书 10
3.1 设计计算 10
3.2 支护结构土压力的计算理论 11
3.3 AB段支护结构设计计算 12
3.4 BC段支护结构计算 16
3.5 CD段支护结构计算 19
3.6 DA段支护结构计算 22
第四章 电算校核 26
4.1 AB段电算结果 26