基于黄淮学院近邻河高层住宅基础工程稳定性分析

发布时间：2018-06-05 07:43

本文选题：高层建筑 + 近距临河　；参考：《西南科技大学》2017年硕士论文

【摘要】：高层建筑群的密集存在,使紧邻既有"建筑、交通设置、河流和湖泊"等设施从事高层建筑实践活动时有发生。由于邻河(湖)居住环境幽静、气候宜人,该区域住宅建筑越来越受到市民的衷爱。然而,考虑到新建高层建筑周边河流环境的影响,近距临河从事工程实践活动必须面临的一个关键问题:河流水位变化、地震等突发荷载等对基坑结构的整体稳定性影响?基于此考虑,依托驻马店市开源大道和文明路交叉口路南临河黄淮学院教职工住宅楼为工程背景,对近距临河高层建筑住宅基础工程的稳定性进行研究。主要内容如下:在文献查阅和现场调研的基础上,对高层建筑结构特点、支护类型等进行了总结和归纳;结合驻马店市开源大道和文明路交叉口路南临河黄淮学院教职工住宅楼工程实例,对建筑设计概况、水文地质概况、地震等级及周边临河环境等进行分析;将数学模糊理论引入到基坑支护结构稳定性分析中,构建影响支护结构稳定性因素的层次结构模型,判别影响基坑支护结构稳定性的因素从轻到重依次为:水文地质条件、基坑支护结构、地震作用和近距河流影响。结合室内土工试验和现场原位试验数据,对基坑粉质黏土的物理力学特性进行研究,提出基坑土钉墙支护方案并对其整体稳定性进行评估。借助ABAQUS有限元软件,采用数值模拟的方法对基坑开挖过程中支护结构的稳定性进行分析。结果表明:基坑开挖支护后,侧向位移整体较小,最大侧向位移控制在2mm以内,支护应力远小于设计强度,基坑支护结构稳定性较高。分析"地震"和"河流水位变化"外部荷载条件改变对基坑支护结构的影响。借助ABAQUS有限元软件建立数值模拟,首先对临河水文变化引起的基坑支护结构稳定性进行评估,然后对突发地震作用下基坑支护的整体稳定性进行分析。同时结合数模型,探讨了住宅楼使用期两大外部荷载条件变化过程中基坑整体稳定性。
[Abstract]:Because of the dense existence of high-rise buildings, the construction, traffic arrangement, rivers and lakes, and other facilities, which are close to each other, are often engaged in high-rise building practice activities. Because of the quiet living environment and pleasant climate, residential buildings in the area are becoming more and more popular. However, considering the influence of the river environment around the new high-rise building, a key problem that must be faced in engineering practice is the influence of river water level change, earthquake and other sudden loads on the overall stability of foundation pit structure. Based on this consideration, this paper studies the stability of the residential foundation of the high-rise building near the river in Zhumadian, relying on the residential building of Huanghe Huanghuai University in the south of Zhumadian intersection of Open Source Avenue and Civilization Road. The main contents are as follows: on the basis of literature review and field investigation, the characteristics of high-rise building structure and the types of support are summarized and summarized. Combined with the project example of the residential building of Huang-Huai University at the intersection of open source road and civilized road in Zhumadian, the general situation of architectural design, hydrogeology, earthquake grade and surrounding riverside environment are analyzed. This paper introduces the mathematical fuzzy theory into the stability analysis of foundation pit support structure, constructs the hierarchical structure model that affects the stability of foundation pit support structure, and discriminates the factors influencing the stability of foundation pit support structure from light to heavy: hydrogeological condition. Foundation pit support structure, seismic action and close-range river impact. The physical and mechanical properties of silty clay of foundation pit were studied based on the data of indoor geotechnical test and field in-situ test. The supporting scheme of soil nailing wall for foundation pit was put forward and its overall stability was evaluated. With the help of ABAQUS finite element software, the stability of supporting structure during excavation of foundation pit is analyzed by numerical simulation method. The results show that the lateral displacement is smaller after excavation, the maximum lateral displacement is controlled within 2mm, the support stress is much less than the design strength, and the stability of foundation pit support structure is high. The influence of "earthquake" and "river water level variation" on foundation pit supporting structure is analyzed. With the help of ABAQUS finite element software, the stability of foundation pit support structure caused by hydrological change in Linhe River is first evaluated, and then the overall stability of foundation pit support structure under sudden earthquake is analyzed. At the same time, combined with the numerical model, the overall stability of foundation pit during the change of two external load conditions of residential building is discussed.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU470

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