土工基础

›› 2016, Vol. 30 ›› Issue (3): 298-302.

• 工程实录 • 上一篇    下一篇

深基坑实测及其支护优化研究

闫 婷1,黄雪阳2   

  1. （1.广东省重工建筑设计院有限公司,广州 510034；2.华南理工大学土木与交通学院，广州 510641）
  • 收稿日期:2015-05-15 修回日期:2015-05-30 出版日期:2016-06-20 发布日期:2016-06-21
  • 作者简介:闫 婷（1983-），女，工程师，主要研究方向为基坑工程设计与监测。

Construction Monitoring and Optimization of a Deep Excavation

YAN Ting1， HUANG Xueyang2   

  1. (1.Guangdong Zhonggong Architectural Design Institute Co., Ltd., Guangzhou 510034;
    2.School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641)
  • Received:2015-05-15 Revised:2015-05-30 Online:2016-06-20 Published:2016-06-21

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。

关键词: 深基坑, 现场监测, 方案优化, 数值分析, 信息化施工

Abstract: 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 excavation 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 indicated 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.

Key words: Deep Excavation, In-Situ Monitoring, Design Optimization, Numerical Analysis, Informational Construction