土工基础

›› 2017, Vol. 31 ›› Issue (4): 453-458.

• 工程实录 • 上一篇    下一篇

深基坑桩锚支护特性数值模拟研究

周 毅，李红梅   

  1. （成都兴蜀勘察基础工程公司，成都 610000）
  • 收稿日期:2017-05-08 修回日期:2017-05-10 出版日期:2017-08-20 发布日期:2017-08-22
  • 作者简介:周 毅（1985-），男，工程师，研究方向为基坑变形。

Numerical Analysis of Soldier Piles in a Deep Excavation Supporting System

ZHOU Yi, LI Hongmei   

  1. (Chengdu Xingshu Geotechnical Investigation and Foundation Engineering Co., Chengdu 610000)
  • Received:2017-05-08 Revised:2017-05-10 Online:2017-08-20 Published:2017-08-22

摘要： 随着现代城市发展速度的加快，对高层和地下建筑的需求日益增加，深基坑工程的应用也越来越广泛，如何在保证安全的同时取得较好的经济效益，还需进行深入的研究与分析。以北京四季青自来水抢险中心深基坑工程为背景，通过理论分析、实验研究、数值模拟相结合的方法对深基坑开挖过程中基坑的变形进行研究，通过对FLAC3D数值模拟结果进行分析得出：随着基坑开挖深度的增加，土体及支护结构变形逐渐增大；锚杆对支护结构稳定性有积极作用；基坑第三步开挖时，基坑变形达到最大，在施工时应予以重视。

关键词: 深基坑工程, 数值模拟, FLAC3D, 基坑变形

Abstract: The need of high raised buildings and underground spaces increases with the urban development. As a result, the applications of deep excavation supporting systems are more and more popular. The cost effective and construction safety still required further research into the supporting system. The paper presents a case history of deep excavation of Beijing Sijiqing Drinking Water Emergency Center. The deformation of the excavation supporting system is evaluated throughout the theoretical analysis, laboratory testing and numerical simulations. The three dimensional FLAC3D analysis results indicate that, with the increasing of the excavation depth, the deformations in soil mass and the supporting system are also increasing. The ground anchors can effectively control the deformation in the supporting system. The excavation depth reaches the maximum depth and the deformations in the supporting system also become the maximum.

Key words: Deep Excavation Projects, Numerical Simulation, FLAC3D； Deformation in Deep Excavation Supporting System