孔内深层强夯法(DDC法)在高原机场地基处理中的应用研究——以重庆武隆仙女山机场试验段项目为例
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摘要
该文介绍了孔内深层强夯法(DDC)的作用机理和技术特点,并针对高原山区机场工程复杂的地质条件,首次在武隆机场试验段项目中开展DDC桩工法实践研究。现场检测复合地基承载力和沉降变形模量等各项技术指标均满足设计要求,DDC桩的抗滑及抗变形能力、地基的承载力得到较大的提高,取得的施工经验和现场参数对完善项目后续设计指标和施工技术措施具有重要的指导意义。
The function mechanism and technical characteristics of the DDC technique were introduced. In view of the complex geological conditions of airport engineering in the plateau mountainous area, the practical study of DDC pile method was carried out for the first time in the test section project of Wulong airport. In the on-site testing, the bearing capacity and settlement deformation modulus of the composite foundation meet the design requirements, and the anti-sliding and anti-deformation capacity of DDC piles and the bearing capacity of the foundation were all enhanced dramatically. The construction experience and site parameters obtained have important guiding significance in improving the follow-up design index and construction technical measures of the project.
The function mechanism and technical characteristics of the DDC technique were introduced. In view of the complex geological conditions of airport engineering in the plateau mountainous area, the practical study of DDC pile method was carried out for the first time in the test section project of Wulong airport. In the on-site testing, the bearing capacity and settlement deformation modulus of the composite foundation meet the design requirements, and the anti-sliding and anti-deformation capacity of DDC piles and the bearing capacity of the foundation were all enhanced dramatically. The construction experience and site parameters obtained have important guiding significance in improving the follow-up design index and construction technical measures of the project.
引文
[1]MH 5014-2002民用机场飞行区土(石)方与道面基础施工技术规范[S].北京:中国民航出版社,2003.
[2]CECS 197-2006孔内深层强夯法技术规程[S].北京:中国计划出版社,2006.
[3]范志勇,程新涛.孔内深层强夯技术在湿陷性黄土地区应用及检测[J].探矿工程:岩土钻掘工程,2004(11):23-25.
[4]李永华.DDC法在大厚度湿陷黄土地区的应用[J].有色金属设计,2012(1):44-46.
[5]JGJ 79-2012建筑地基处理技术规范[S].北京:中国建筑工业出版社,2013.
[2]CECS 197-2006孔内深层强夯法技术规程[S].北京:中国计划出版社,2006.
[3]范志勇,程新涛.孔内深层强夯技术在湿陷性黄土地区应用及检测[J].探矿工程:岩土钻掘工程,2004(11):23-25.
[4]李永华.DDC法在大厚度湿陷黄土地区的应用[J].有色金属设计,2012(1):44-46.
[5]JGJ 79-2012建筑地基处理技术规范[S].北京:中国建筑工业出版社,2013.