中冶南方大厦深基坑支护设计与应用研究

发布时间：2018-10-29 13:30

【摘要】：基坑支护是现在市政工程的一个热点同时也是一个难点问题。基坑支护的安全性直接影响着整个工程的进度和安全。随着经济的不断发展,城市建筑在不断拔高,基坑的开挖深度也在逐步加深,最大深度达到了20~30米,设计难度愈发增大。基坑工程涉及到地质工程、岩土工程、结构工程和岩土测试技术等等,是一门综合性学科。其主要内容包括:工程勘察、支护结构设计与施工、土方开挖与回填、地下水控制、信息化施工及周边环境保护等。基坑开挖过程中要考虑众多因素影响:基坑支护方案的选择、基坑支护结构力与位移的变化、基坑排水、基坑周边环境建筑物沉降发展等等,解决以上问题是确保工程建设安全、经济、科学的根本保证。本文结合中冶南方大厦基坑开挖与支护工程,展开了以下研究:1)依据基坑岩土体参数条件、开挖深度和周边建筑物分布情况,结合常见的房屋基坑支护方式以及选型原理,考虑分析基坑支护方案优选的影响因素,对中冶南方大厦的基坑支护方案进行优选。2)利用基坑工程计算软件天汉V2005.1对优选出的最佳基坑支护方案中的撑梁、立柱和内支撑强度、位移进行计算分析。3)根据基坑降水的理论计算方法进行了中冶南方大厦基坑工程降水的设计计算,以确保承压水和微承压水的降水井布置数量和口径都能满足要求。4)依据中冶南方大厦基坑设计方案以及施工队伍组成,在对深基坑支护技术研究与安全性评价的基础上,对复杂周边环境深基坑挖扰动效应下的施工方案、施工工艺进行优化。
[Abstract]:Foundation pit support is a hot spot and a difficult problem in municipal engineering. The safety of foundation pit support directly affects the progress and safety of the whole project. With the continuous development of economy, urban buildings are constantly drawing up, the excavation depth of foundation pit is gradually deepening, the maximum depth has reached 20 ~ 30 meters, and the design difficulty is becoming more and more difficult. Foundation pit engineering involves geological engineering, geotechnical engineering, structural engineering and geotechnical testing technology, etc. It is a comprehensive subject. The main contents include: engineering investigation, support structure design and construction, earthwork excavation and backfill, groundwater control, information construction and surrounding environmental protection. In the process of foundation pit excavation, many factors should be considered: the selection of foundation pit support scheme, the change of foundation pit support structure force and displacement, the drainage of foundation pit, the settlement and development of surrounding buildings, and so on. Solving the above problems is the fundamental guarantee to ensure the safety, economy and science of engineering construction. In this paper, based on the excavation and support engineering of the Southern Mansion in Zhongye, the following researches are carried out: 1) according to the parameters of rock and soil, the depth of excavation and the distribution of surrounding buildings, combined with the common supporting methods and selection principle of foundation pit, Considering the factors influencing the optimum selection of foundation pit support scheme, the foundation pit support scheme of Southern Mansion in China Metallurgical Company is optimized. 2) the bracing beam in the optimum foundation pit support scheme selected by Tianhan V2005.1 is used in the foundation pit engineering calculation software. The strength and displacement of column and inner support are calculated and analyzed. 3) based on the theoretical calculation method of foundation pit dewatering, the design and calculation of foundation pit dewatering for Southern Mansion in Zhongye are carried out. In order to ensure that the quantity and caliber of dewatering well layout of confined water and micro-confined water can meet the requirements. 4) according to the foundation pit design scheme and construction team composition of Southern Mansion in Zhongye, on the basis of deep foundation pit support technology research and safety evaluation, The construction scheme and construction technology of deep foundation pit under disturbance effect in complex surrounding environment are optimized.
【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU753

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