长春某工程深基坑支护方案优化设计及数值模拟

发布时间：2019-04-28 10:48

【摘要】：建筑基坑支护的问题关乎质量安全、经济成本、生态环境、适用难度、技术工期等多方面,是一项复杂的系统工程,涉及结构和岩土等多个领域,综合性很强。合理设计基坑支护可以有效地降低工程成本、提高工程质量、大大降低事故发生的几率,避免造成人身财产损失。因此,对基坑支护方案进行优选和优化设计,是一项需要反复研究和深入探讨的难题。本文通过研究分析具体工程中的基坑支护结构设计过程中出现的一些需要亟待解决的问题,进行了基坑支护结构设计方案优选,并在优选的基础上进行了支护结构的局部细部构造设计,希望能为相关类似工程提供相关技术指导和理论支撑。本文首先详细总结介绍了国内外常用的基坑支护结构型式,并且通过大量的基坑工程实例总结对比各支护型式的适用范围、局限性及优缺点,阐述确定基坑支护方案的初选原则,提出了支护方案优选的定量方法。建立数学优选综合评价模型,以质量安全可靠度、施工技术难度、经济成本、对周围环境的影响这4个评价指标为优化目标以长春某基坑为例,对基坑支护方案进行了优选。首先依据本工程的基坑等级及现场条件初选出几个适用于本工程的支护方案,随后建立综合评价模型,对支护结构进行优选分析,优选出适合本工程的基坑支护方案。优选出基坑支护的整体方案后,还需要设计支护结构的细部构造。本文以长春某基坑为例,整体稳定性、安全性和经济性的角度出发,通过基坑设计软件对细部构造进行了详细分析,最后通过有限数值模拟并结合监测数据确定了结构的安全性。
[Abstract]:The problem of building foundation pit support is related to quality safety, economic cost, ecological environment, difficulty of application, technical time limit and so on. It is a complex system engineering, involving many fields such as structure and rock and soil, and it is very comprehensive. Reasonable design of foundation pit support can effectively reduce the engineering cost, improve the quality of the project, greatly reduce the probability of accidents, and avoid the loss of personal and property. Therefore, it is a difficult problem to optimize and optimize the supporting scheme of foundation pit. Based on the research and analysis of some problems that need to be solved urgently in the process of foundation pit support structure design in concrete engineering, the optimum design scheme of foundation pit support structure is carried out in this paper. On the basis of optimum selection, the local detail structure design of the support structure is carried out, hoping to provide relevant technical guidance and theoretical support for the related similar projects. In this paper, the commonly used types of foundation pit support structure at home and abroad are summarized and introduced in detail, and the application scope, limitation, advantages and disadvantages of each support type are summarized and compared through a large number of foundation pit engineering examples. This paper expounds the principle of primary selection of supporting scheme for foundation pit, and puts forward a quantitative method for optimum selection of supporting scheme. The comprehensive evaluation model of mathematical optimization is established. Taking the four evaluation indexes of quality safety reliability, construction technical difficulty, economic cost and the influence of surrounding environment as the optimization objective, a foundation pit supporting scheme in Changchun is selected as an example. According to the foundation pit grade and site conditions of this project, several supporting schemes suitable for this project are initially selected, and then a comprehensive evaluation model is set up to optimize and analyze the supporting structure and to optimize the supporting scheme suitable for this project. After optimizing the whole scheme of foundation pit support, it is necessary to design the detail structure of supporting structure. Taking a foundation pit in Changchun as an example, from the point of view of overall stability, safety and economy, the detailed structure of a foundation pit is analyzed in detail through the software of foundation pit design. Finally, the safety of the structure is determined by finite numerical simulation and monitoring data.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU473

【引证文献】