预应力薄壁管桩在公路软基处理中应用的试验研究  

Test on Soft Ground Improvement for Highway Engineering Using Prestressed Tubular Concrete Pile

作　　者：余闯[1] 刘松玉[2] 杜广印[2] 

机构地区：[1]温州大学建筑与土木工程学院,浙江温州325005 [2]东南大学岩土工程研究所,南京210096

出　　处：《工程勘察》2008年第12期1-4,共4页Geotechnical Investigation & Surveying

基　　金：住房和城乡建设部科技计划项目(2008-K2-11)

摘　　要：带桩帽的预应力薄壁管桩结合土工格栅加筋垫层的刚性桩复合地基处理高速公路深厚软土地基,具有施工质量易控制、施工速度快、工后沉降及不均匀沉降小、地基处理深度大、复合地基承载力大、造价比较适中等突出优点。本文结合连盐高速公路试验段施工期间和路堤填筑期间的实测资料,通过对填筑期间土压力、沉降、侧向变形的分析,突出体现了预应力管桩在加固深厚软土地基中的实用性和优越性。The Prestressed Tubular Concrete Pile （PTC pile） with individual cap combined geosynthetic- reinforcement has demonstrated excellent performance characteristics in soft ground treatment for highway engineering. This system owns technical and economical advantages over other methods, for example, convenient alternating construction, little post-construction and differential settlements, deep depth of ground improvement, high load capacity and savings of construction time and costs. In this paper, one case on Lian-yan expressway is presented to investigate the performance of soft ground improvement. The observed data on soil pressure, settlement and later deformation during filling show the advantage of the application of PTC pile in deep soft ground improvement.

关 键 词：预应力薄壁管桩 公路 地基处理 软土 

分 类 号：TU472[建筑科学—结构工程] U213.15[建筑科学—土工工程]