摘要
如何通过基坑动态实测结果优化支护方案和指导实际施工,是值得深入考虑的问题。基于广州某盾构工作井基坑的地下水位变化、支护体系力学特性及周围环境扰动等实测结果,详细分析了基坑开挖阶段地下水位下降的原因、支护体系变形规律及周边环境的受扰动情况。针对施工中围护结构变形值小的现象,提出原支护方案优化建议,且通过三维数值分析进行了验证,最终减少了一道钢支撑,较好地反映了动态设计与信息化施工的理念,确保了工程建设的可行性和经济性。
Utilizing the real time monitored deep excavation data to optimize the support system design scheme and to guide the construction are widely discussed among practitioners. This paper presents the construction monitoring results of the deep ex- cavation support of a vertical shaft for a shielded tunnel construction in Guangzhou. The groundwater variation, deformation of the supporting system, as well as the disturbance to the adjacent environments were monitored. The monitoring results indica- ted that the deformation in the original supporting system was very small and the optimization of the supporting system was investigated. Three dimensional numerical analysis was performed with the calibrated data. As a result of applying the monitored data guiding the consequence construction, one layer of the horizontal steel struts was eliminated.
出处
《土工基础》
2016年第3期298-302,共5页
Soil Engineering and Foundation
关键词
深基坑
现场监测
方案优化
数值分析
信息化施工
Deep Excavation
In-Situ Monitoring
Design Optimization
Numerical Analysis
Informational Construction
