土工基础

›› 2015, Vol. 29 ›› Issue (5): 76-77.

• 工程实录 • 上一篇    下一篇

岩溶地区复合地基承载力检测与分析

刘远程1，2,朱苦竹1，2   

  1. （1.桂林理工大学 土木与建筑工程学院,广西 桂林 541004；2.广西岩土力学与工程重点实验室 广西 桂林 541004）
  • 收稿日期:2014-11-24 出版日期:2015-10-20 发布日期:2015-11-06
  • 作者简介:刘远程（1988-），男，在读硕士，研究方向为岩土工程、地下工程及隧道工程。

Analysis and Determination of the Bearing Capacity of the Composite Foundations in Karst Terrain

LIU Yuancheng1,2，  ZHU Kuzhu1,2   

  1. (1.College of Civil Architectural Engineering, Guilin University of Technology, Guilin 541004；
    2.Key Laboratory of Guangxi Geotechnical Engineering, Guilin 541004)
  • Received:2014-11-24 Online:2015-10-20 Published:2015-11-06

摘要： 常见的岩溶地质灾害对建筑物地基的影响主要为地基承载力不足、溶洞、土洞、岩溶塌陷等。对地基土可塑性分布不均、承载力不足、溶洞发育的不良地基，使用水泥碎石挤密桩与水泥压力灌浆的复合地基处理方法进行处理，并对处理后的水泥碎石桩挤密桩地基和水泥压力灌浆地基分别进行强度验算及标准贯入试验，以检测复合地基承载力。结果表明，该复合地基处理方法对此类岩溶地基具有较好的处理效果，对类似的岩溶地基工程具有较好的参考意义。

关键词: 岩溶地基 , 复合地基, 承载力不足, 碎石挤密桩 , 水泥压力灌浆

Abstract: The common geological hazards in the karst areas are: lack of bearing resistance, rock and soil cavities and sinkhole collapses. The compacted cement and gravel columns combined with the cement pressure grouting methods are used to treat the unfavorable grounds with uneven soil thickness with poor bearing capacity and highly developed karstic rock cavities. The bearing capacity of the treated ground is examined and verified with the standard penetration testing. The results indicated that the combination of compacted cement gravel columns combined with cement pressure grouting methods was successful in improving the soil foundations in the karst terrain.  

Key words: Foundations in Karst, Composite Ground, Poor Bearing Capacity, Compacted Gravel Columns, Cement Pressure Grouting