高速公路塑料套管桩复合地基处理机理分析  

Mechanism of Composite Foundation Treatment about Plastic Tube Cast-in-place Concrete Pile on Expressway

作　　者：龚锦林[1] 杨进[1] 陈露[1] 张军辉 

机构地区：[1]湖南省交通科学研究院,湖南长沙410015 [2]长沙理工大学交通运输工程学院,湖南长沙410082

出　　处：《公路工程》2012年第1期71-74,106,共5页Highway Engineering

基　　金：国家重点基础研究发展计划资助(2011CB411910)

摘　　要：针对公路塑料套管桩(TC桩)加固软土地基作用特点,将TC桩视为不透水桩体。在前人研究成果的基础上,根据孔隙水压力连续条件,运用一维固结理论推导加固区及下卧层的平均固结度。最后,结合岳阳至常德高速公路试验段工程对本文研究成果进行验证,结果表明采用方法计算的固结度及沉降值与实测成果接近。从而,说明该计算方法的实用性、合理性,并可为类似工程实践提供理论参考。According to the characteristics of soft foundation reinforced by Plastic Tube Cast-in-place Concrete Pile,it is modeled as an impermeable pile.And average degree of consolidation on the improved area and the subjacent bed are solved with continuous pore-water pressure,the uni-dimensional consolidation theory on the basis of previous studies.At last,the research findings is validate by comparing analytical solutions with the test results of the Yueyang-Changde Highway.And it shows that the analytical solutions are close to the measure datas.Consequently,the calculation method is rational,and can be applied in similar engineering practices.

关 键 词：塑料套管桩 软土地基 复合地基 加固 沉降 

分 类 号：U416.1[交通运输工程—道路与铁道工程]