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摘要随着我国经济的发展，城市化进程不断加快，城市建设过程中出现了大量的深大的基坑。为了保证基坑主体施工的安全与方便，保证基坑对周围建筑和交通设施产生较小的影响，必须对基坑边坡进行稳定性验算，通过勘察报告，选用合理的支护结构型式。本文对南山华庭1#楼基坑地质和周围环境进行分析和计算，选择设计出一套合理的支护结构型式。本工程基坑深度为5.9m，土质和水文条件良好，工程地质条件复杂。通过对勘察报告的详细分析，得出了一套设计方案，主要是运用朗肯土压力法对支护结构所受荷载进行计算。计算出灌注桩的最大弯矩，最后计算出灌注桩支护结构的桩长和配筋。综合考虑施工方便，经济适用，安全可靠等各方面的要求，本工程支护桩支护方案采用灌注桩支护结构型式，坑内采用钢筋混凝土支撑结构，降水采用轻型井点降水。51291
毕业论文关键词：深基坑；支护结构；土压力；灌注桩；降水
Abstract
With the development of China's economy and the accelerating of the urbanization process. Appeared in the process of urban construction a large number of deep and large foundation pit. In order to keep the subject construction of foundation pit safety and convenience,and Guarantee the excavation on the surrounding buildings and transportation to has a smaller impact. We Must carry out a calculation on the pit slope stability . Through the investigation report, we should choose the reasonable supporting structure type. In this paper, the nanshan Minneapolis 1 # building foundation pit geological and environment analysis and calculation,then we can choose to design a set of reasonable supporting structure type. The engineering of foundation pit depth is 5.9 m,it has good soil and hydrology condition, but engineering geological condition is complex. Through detailed analysis of survey report, we draw a set of design scheme, it has mainly used the method of Rankine's earth pressure on retaining structure under load is calculated. We has calculated the maximum bending moment of piles, and finally calculate the piles and pile length of retaining structure reinforcement. We has Finally designed a set of suitable for precipitation scheme and construction scheme of this project.
Key words: Foundation pit; Bracing structure; Earth pressure; Bored piles; precipitation
目录
第一章 绪论-1
1.1引言1
1.1.1基坑支护的重要性研究-2
1.1.2 基坑支护结构的选择依据3
1.1.3基坑支护结构型式-5
1.1.4 深基坑支护技术的发展展望7
1.1.5我国深基坑工程的主要特点以及存在的问题8
1.2 灌注桩支护结构设计施工中存在的问题-8
1.3 本次选题的目的和意义8
1.3.1 选题的目的-9
1.3.2 选题的意义10
第二章 方案介绍-11
2.1 工程简况12
2.2 场地的地形、地貌、地质构造-13
2.3 场地地层结构14
2.4 场地地下水15
2.5 支护方案的设计15
2.5.1 设计思路-16
2.5.2 排、降水设计-16
2.5.3 支护方案设计17
2.6 其他说明-17
2.7 设计依据18
第三章 基坑支护结构设计计算书-19
3.1 设计计算 19
3.1.1 地质计算参数表-19
3.1.2工程计算区段的划分-19
3.1.3开挖的工况安排-19
3.1.4设计依据-19
3.2土压力计算理论分析与介绍20
3.2.1土压力模式-20