高速公路CFG桩复合地基振动成型法试验研究  

Experimental study on vibration forming of CFG pile composite foundation in expressway

作　　者：曾伟 曹锋 ZENG Wei;CAO Feng(Hunan Hengli Construction Engineering Co.,Ltd.,Changsha 410007,China)

机构地区：[1]湖南路桥建设集团有限责任公司,湖南长沙410004

出　　处：《交通科学与工程》2020年第4期22-27,共6页Journal of Transport Science and Engineering

摘　　要：为证实CFG桩加固软土路基的有效性,以某实际工程为依托,通过室内试验和现场试验,对CFG桩振动加固软土地基时的施工参数进行研究,确定最有利的施工参数。试验结果表明:在室内振动实验时,当单次振动时间在160~200 s时,干密度可达到较大值,与现场试验获得的干密度相差约0.054 g/cm^3;在现场经过5~6次碾压之后,可获得较大的最大干密度约为2.385 g/cm^3;在经历160 s的振动和5~6次碾压后,复合地基的含水率基本不变,维持在5%左右。可为类似工程施工提供参考。For confirm the effectiveness of CFG pile to reinforce soft soil roadbed,based on a practical project,through laboratory test and field test,the construction parameters of CFG pile vibration reinforcement soft soil foundation are studied,and the most favorable construction parameters are determined.The test results show that when the single vibration time is 160~200 s,the dry density reaches a higher value,and the dry density difference of the site test is about 0.054 g·cm^3.After 5~6 times of rolling,the maximum dry density is about 2.385 g/cm^3.After a certain vibration time(160 s)and rolling times(5~6 times),the moisture content of the composite foundation is basically unchanged.It can provide reference for similar projects.

关 键 词：高速公路 CFG桩 施工 试验研究 

分 类 号：U213.15[交通运输工程—道路与铁道工程]