土工基础

›› 2011, Vol. 25 ›› Issue (5): 31-34.

• 工程实录 • 上一篇    下一篇

CFG桩复合地基施工过程的沉降数值模拟与分析

李 斌1, 赵健雄2, 胡建华3, 胡毅夫3   

  1. （1.武汉谦诚岩土工程有限责任公司，武汉 430062； 2.中铁第四勘察设计院集团有限公司，武汉 430063；3.中南大学资源与安全工程学院，长沙 410083）
  • 收稿日期:2011-07-07 出版日期:2011-10-20 发布日期:2011-11-23
  • 作者简介:李斌，男,1978年生，注册岩土工程师，高级工程师，从事高铁工程软基处理技术研究与施工。

Numerical Simulations of CFG Column Composite Ground Improvement

LI  Bin1, ZHAO  Jian  xiong2, HU  Jian  hua3, HU  Yi  fu3   

  1. (1. Qiancheng Construction Group Co., Wuhan 430063;
    2. China Railway Siyuan Survey and Design Group Co. Ltd, Wuhan 430063；3. School of Resources and Safety Engineering, Central South University, Changsha 410083, China)
  • Received:2011-07-07 Online:2011-10-20 Published:2011-11-23

摘要： 高速铁路在软弱路基中的施工过程及其工后沉降是影响高速铁路运营安全的重要因素。根据武广高速铁路某段实际工况，选取一典型断面，运用ADINA有限元软件对CFG桩复合地基的施工过程和最终沉降进行数值模拟分析。研究结果表明，CFG桩复合地基能较好地适用于客运专线软土地基加固处理，满足客运专线路基承载力和设计变形值的要求，有效地控制工后沉降，加固效果明显。

关键词: CFG桩, 复合地基, 数值模拟, 工后沉降

Abstract: For a high speed rail over soft soils, the post construction settlement is an important factor affecting safe operation. The Cement Fly\|ash Gravel (CFG) column composite ground improvement technique was selected to strengthen the soft soils in the high speed passenger rail project from Wuhan to Guangzhou. Based on the typical subsurface conditions, numerical analyses on the CFG column composite ground mass were conducted using the ADINA Finite Element Method. The results indicate that a maximum of 35 mm settlement would occur immediately after the soil improvement construction. This allowed development of measures to control settlement after laying the tracks. This study indicated that CFG composite ground is an effective method of soil improvement for high speed passenger rail construction. The bearing capacities and post construction settlements of the composite ground mass can meet the design requirements.