土工基础

›› 2015, Vol. 29 ›› Issue (1): 45-48.

• 工程实录 • 上一篇    下一篇

微型CFG桩-水泥压力注浆复合地基的应用研究

刘 源1，2，3 ，张可能1,2, 刘 创1,2，肖小玲2,3   

  1. (1.有色资源与地质灾害探查湖南省重点实验室，长沙 410083；
    2.中南大学地球科学与信息物理学院地质工程系，长沙 410083；3.中国有色桂林矿产地质研究院，广西桂林 541004)
  • 收稿日期:2014-01-10 出版日期:2015-02-20 发布日期:2015-03-13
  • 作者简介:刘 源(1966-)，男，博士研究生，主要研究方向为岩土工程勘察。

Mini CFG Column-Cement Pressure Grout For Soil Improvement

LIU Yuan1,2，3, ZHANG Keneng1,2, LIU Chuang1,2， XIAO Xiaoling2，3   

  1. （1.Key Laboratory of NonFerrous Resources and Geological Hazard Detection, Changsha, 410083；
    2.School of Geoscience and InfoPhysics, Central South University, Changsha, 410083；
    3.China Nonferrous Metal Guilin Research Institute of Geology for Mineral Resources，Guilin 541004）
  • Received:2014-01-10 Online:2015-02-20 Published:2015-03-13

摘要： 近年来，微型CFG桩复合地基作为一种地基加固处理方法，在工程中得到了广泛的运用。桂林地区地质复杂溶沟发育且埋深较大，常存在软弱夹层地层，而微型CFG桩施工长度一般在3~5m左右，仅采用微型CFG桩有时又无法满足设计要求，需结合其他处理方法。结合工程实例，提出了微型CFG桩和水泥压力注浆共同处理的方法，并对其承载和变形特性进行分析，得到了一些结论，供施工参考。

关键词: 微型CFG桩, 水泥压力注浆, 复合地基

Abstract: The mini Cement-Fly Ash-Gravel columns receive wider applications in the soil improvement projects as a composite ground. The results of these applications have shown the achievements in the economics and the environment aspects. The length of a typical mini CFG column is between three (3) and five (5) meters. The application of this method in the Guilin area is usually limited due to the complexity of the karst terrain, which often involves soft weak layers in greater depths. One of the new applications is to combine with other method, such as, cement pressure grout method. The case history indicates that this combination meets the requirements of both bearing capacity and the deformation. This paper presents the project details.

Key words: Minim CFG Columns, Cement Pressure Grout, Composite Ground