【作者】 吴宇虎；

【导师】 杜晓玲；

【作者基本信息】 南昌大学 ， 结构工程， 2010， 硕士

【摘要】 当前,随着高层建筑的迅速发展,建筑基坑越来越深,而且周围环境也越发复杂,施工难度更大,对基坑支护结构形式的选择和方案优选提出了更高的要求。因此,如何科学合理的选择一个安全可靠、技术可行、施工简便、经济合理以及其他各方面综合效益更优的支护方案,是基坑工程要解决的主要内容,也是决策人员必须面对的一个难点和热点问题。本文依据目前南昌市基坑工程现状,详细介绍了当前使用较广泛的几种基坑支护形式,系统分析、总结了南昌市区域地质构造特点、地基土层相关信息及特性、地下水岩层分布情况、地下水类型及埋深情况等,对影响基坑支护结构型式选择的不同因素进行归纳和总结,给出了不同深度范围内、不同条件下的基坑支护备选方案选择推荐表。其次,采用Delphi评分法对初步拟定的基坑支护方案优选评价指标体系进行筛选,运用系统工程学中层次分析法求解各指标权重,再依据多目标模糊数学理论建立了一套简便、实用的基坑支护方案优选数学模型,并引入价值工程思想对优选模型进行进一步优化,最后结合具体工程实例验证该优选模型的有效性和实用性。更多还原

【Abstract】 At present, with the rapid development of high-rise buildings, higher requirements of the foundation pit forms and scheme optimization are put forward because of the deeper building pit, the complex surrounding environment and difficult construction. Therefore, how to choose a scientific and safe, technically feasible and economical, and simply constructional support program with other comprehensive aspects of benefits, is the main content of foundation projects to solve and a difficult and hot issues for policy makers need to face.Based on the current status of foundation projects in Nanchang, This article describes several supporting structure characteristics of the current use in detail, and comprehensively analyze and summarize regional geological structure characteristics, information about the Foundation and the characteristics of the soil, groundwater, groundwater, strata distribution type and depth in Nanchang; different factors are summarized depending on the impact of foundation support structure types, and gives a recommend table of pit program selection according to different depth range, different conditions. Then, the initial formulation of the Foundation is filed using Delphi scoring method of pit optimization evaluation index system, and the hierarchy analysis method of the index weight in systems engineering and Multi-objective fuzzy mathematics theory are utilized to establish a set of simple, practical support scheme selection of mathematical model, furthermore, thoughts of value engineering optimization model is used for further optimization and combine with a specific project to verify the efficiency and practicality of optimum model.更多还原