DDC灰土挤密桩在湿陷性黄土地区大型钢储罐工程中的应用
- 摘 要
-
(南京工程学院建筑工程学院,南京 211167)[摘要]结合湿陷性黄土地区某大型钢储罐工程,从加固机理、受力特性、承载力和沉降计算等方面对孔内深层强夯(DDC)灰土挤密桩进行了深入研究,提出了帷幕桩和帷幕内桩的划分概念。实践表明,利用不等长DDC灰土挤密桩对湿陷性黄土地基进行处理,能较大幅度地提高地基承载力,消除黄土的湿陷性,节约工程造价。为湿陷性黄土地区油罐基础提供了一种可行的地基处理方案。[关键词]DDC灰土挤密桩;湿陷性黄土;钢储罐;承载力;沉降Application study on DDC lime-soil pile for large steel storage tank project in collapsible loess areaXie Huaining(School of Civil Engineering, Nanjing Institue of Technology, Nanjing 211167, China)Abstract:Based on a large steel storage tank project in collapsible loess area, deep research of reinforcement mechanism, bearing capacity and settlement calculation for the DDC lime-soil pile was done, and the concept of distinguishing curtain pile from the pile inside curtain was presented. Practice shows that the method of using different length of DDC lime-soil to treat collapsible loess can greatly improve the foundation bearing capacity, eliminate collapsibility and save construction cost. A feasible foundation treatment program for oil tank project in collapsible loess area was provides.Keywords:DDC lime-soil pile; collapsible loess; steel storage tank; bearing capacity; settlement作者简介:谢淮宁,硕士,讲师,一级注册结构工程师,Email:lfmxhn@sina.com。参考文献[1]贾庆山.储罐地基变形允许值[J].特种结构,2002,19(1):38-41.[2]CECS197:2006 孔内深层强夯法技术规程[S].北京:中国计划出版社,2006.[3]龚晓南.复合地基理论及工程应用[M].北京:中国建筑工业出版社,2002.[4]地基处理手册(第二版)编写委员会.地基处理手册[M].2版.北京:中国建筑工业出版社,2000.[5]JGJ79—2002 建筑地基处理技术规范[S]. 北京:中国建筑工业出版社,2002.[6]SH/T3068—2007 石油化工企业钢储罐地基与基础设计规范[S]. 北京:中国石油化工出版社,2007.