PHC管桩在淤泥质土道路地基处理中的沉降分析  

Settlement Analysis of PHC Pipe Pile in Muddy Soil Road Foundation Treatment

作　　者：张洪毓 李乾威 姚孟龙 葛国强 ZHANG Hongyu;LI Qianwei;YAO Menglong;GE Guoqiang(China Construction Second Engineering Bureau Co.,Ltd.Southern China Branch,Shenzhen,Guangdong 518048,China)

机构地区：[1]中国建筑第二工程局有限公司华南分公司,广东深圳518048

出　　处：《建筑施工》2021年第1期159-161,165,共4页Building Construction

摘　　要：为研究PHC管桩在处理淤泥质土地基中的工作性状,利用规范分析法、数值模拟和现场单桩承载力试验对PHC管桩单桩沉降量进行分析和测试。研究结果表明:对于湛江市的淤泥质土-硬塑状粉质黏土地层,增加桩长对减少单桩的沉降量并无明显效果,地层中硬塑状粉质黏土产生的桩端阻力对单桩的承载力影响较大;此外,目前对湛江市淤泥质土的土层设计参数取值较为保守,未充分利用土层的力学性能。研究成果对PHC管桩在湛江市淤泥质土地区中的工程实践有一定的指导意义。In order to study the working behavior of PHC pipe pile in the treatment of muddy soil foundation,the settlement of single PHC pipe pile is analyzed and tested by standard analysis method,numerical simulation and field single pile bearing capacity test.The results show that for the muddy soil-hard plastic silty clay layer in Zhanjiang City,increasing the pile length has no obvious effect on reducing the settlement of single pile,and the pile tip resistance produced by hard plastic silty clay has a great influence on the bearing capacity of single pile.In addition,the soil layer design parameters of Zhanjiang muddy soil are relatively conservative,and the mechanical properties of soil layer are not fully utilized.The research results have a certain guiding significance for the engineering practice of PHC pipe pile in the muddy soil area of Zhanjiang City.

关 键 词：淤泥质土 PHC管桩 单桩静载试验 数值模拟 单桩沉降 

分 类 号：TU753[建筑科学—建筑技术科学]