土工基础

›› 2019, Vol. 33 ›› Issue (1): 11-14.

• 工程实录 • 上一篇    下一篇

武汉东湖通道深厚软土区基坑支护数值模拟分析

吴云刚1,周 淼1,高振宇1,夏水江1,徐德馨2   

  1. （1.武汉市勘察设计有限公司，武汉 430022   2.武汉市测绘研究院，武汉 430022）
  • 收稿日期:2018-04-04 修回日期:2018-04-18 出版日期:2019-03-02 发布日期:2019-03-08
  • 作者简介:吴云刚（1984-），男，工程师，研究方向为岩土工程勘察、地质灾害危险性评估等。

Numerical Analysis of Deep Excavation Support in Thick Silty Soils in Wuhan East Lake

WU Yungang1, ZHOU Miao1, GAO Zhenyu1，XIA Shuijiang1 ,  XU Dexin2
   

  1. (1.Wuhan Geotechnical Engineering and Surveying Co., Ltd., Wuhan 430022；
    2.Wuhan Geomatics Institute, Wuhan 430022)
  • Received:2018-04-04 Revised:2018-04-18 Online:2019-03-02 Published:2019-03-08

摘要： 以武汉东湖通道工程DHTDK2+900～DHTDK3+120里程段软土区地质体为研究对象，对该区段基坑支护方案进行比选，得到最佳的支护形式为排桩加内支撑体系。为得到影响基坑支护效果的关键因素，利用数值模拟软件ABAQUS建立了研究区的三维地质模型，并进行相应的数值计算分析，得到桩径是影响基坑水平位移的最关键因素，在一定的水平位移条件下，可通过优化桩径来降低造价。研究可为武汉东湖通道软土区基坑支护设计与施工提供前瞻性指导，对相近地质条件的类似工程具有借鉴意义。

关键词: 东湖通道, 基坑支护, 深厚软土, 桩径

Abstract: The thick and soft silty soils segment between stations DHTDK2+900 and DHTDK3+120 of Wuhan East Lake Passage Project were used for the study in this paper. The methods for the support of deep excavation in soft soils were compared and it was concluded that the pile frame support with internal support was the optimum supporting method. In order to identify the key factors that affecting the effectiveness of excavation support, the supporting structure was numerically simulated by using three dimensional ABAQUS finite element method. The results indicated that the diameter of the supporting pile was the key factor that affecting the lateral deflection of the supporting structure. The cost of the supporting structure can be minimized by optimizing the diameter of supporting piles.

Key words: east lake passage, deep excavation support, thick silt soils, pile diameters