上海某深基坑支护工程设计、监测与数值模拟

发布时间：2018-10-09 13:06

【摘要】：随着我国经济建设和改革开放所取得的骄人成绩，国民经济也高速增长，各种大中型建设项目如雨后春笋般蓬勃兴起。地基与基础工程作为建筑领域的前期和基础性工作，经过了无数科技工作者进行理论上的探讨和研究，从勘察、设计、施工到监测均已达到一个全新的水平，工程质量、安全、工期均得以优化。但由于我国地域辽阔，地质复杂、分布广泛，施工素质、技术参差不齐，在工程实践中，仍然存在不少问题，特别是安全问题更加让人民群众的生命处在不利边缘。因此，如何在已有的理论基础上能够安全、经济地进行施工已摆在施工建设者面前。本文针对上海新建工业厂房及辅助用房（北块）工程，根据场地地质条件、基坑支护设计方案和基坑围护结构设计资料，制定基坑开挖过程中针对基坑开挖的现场监测方案。基坑开挖过程中，监测数据表明，基坑开挖引起的基坑围护结构及周围土体的位移满足基坑开挖的安全性要求。通过对监测数据及有限元计算结果的分析，结合基坑支护结构安全控制要求，得到如下结论：（1）根据本工程特点，详细计算了选定的支护体系的设计、稳定性计算；（2）通过勘察报告及相关参数采用MIDAS软件对基坑进行模拟分析，，分析确定选定的方案的安全性；（3）利用网络化的监测点对施工过程进行信息化监测，确保工程安全、有序进行；（4）通过模拟数据与监测数据科学对比来确定软件分析对施工指导的实际意义，为类似工程提供参考依据。通过与现场监测数据的对比分析，基坑开挖对周边环境的安全性造成了一定的影响，但在控制范围之内。数值模拟结果与现场监测规律上保持一致，验证了有限元数值模拟的合理性。
[Abstract]:With the remarkable achievements in economic construction and reform and opening up in China, the national economy is also growing at a high speed, and a variety of large and medium-sized construction projects are springing up like bamboo shoots. As a preliminary and basic work in the field of construction, the foundation and foundation engineering has reached a completely new level in terms of investigation, design, construction and monitoring after numerous scientific and technological workers have carried out theoretical discussions and studies, and the engineering quality and safety have been reached. The time limit is optimized. However, due to the vast territory, complex geology, wide distribution, construction quality and uneven technology, there are still many problems in engineering practice, especially the safety problems make the people's lives at the disadvantage of the edge. Therefore, how to carry out the construction safely and economically on the basis of the existing theory has been placed in front of the constructors. Based on the new industrial workshop and auxiliary building (North block) engineering in Shanghai, according to the geological conditions of the site, the design plan of foundation pit support and the design data of foundation pit enclosure structure, the field monitoring scheme for foundation pit excavation during the excavation process is established in this paper. During the excavation of foundation pit, the monitoring data show that the displacement of the surrounding soil and the surrounding soil can meet the safety requirements of the excavation. Through the analysis of monitoring data and finite element calculation results, combined with the safety control requirements of foundation pit support structure, the following conclusions are obtained: (1) according to the characteristics of this project, the design and stability calculation of the selected supporting system is calculated in detail; (2) simulating and analyzing the foundation pit with MIDAS software through the survey report and related parameters, analyzing and determining the security of the selected scheme, (3) using the network monitoring points to monitor the construction process with information, (4) through the scientific comparison of simulation data and monitoring data to determine the practical significance of software analysis to construction guidance and provide reference for similar projects. Comparing with the field monitoring data, the excavation of foundation pit has a certain influence on the security of the surrounding environment, but it is within the control range. The numerical simulation results are consistent with the field monitoring rules, and the rationality of finite element numerical simulation is verified.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU473.2

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