摘要
对武广高速铁路XXTJⅡ标段19个堆载预压工点107个监测断面的施工期地基沉降进行统计分析,分析了不同施工进度下沉降和沉降速率特点。实测结果表明：施工期实测地基沉降为3.0~9.5 mm,说明地基加固方案合理,有效地控制了地基沉降;预压后地基沉降主要发生在施加预压荷载后的第1个月,预压时间超过3个月后,靠延长预压时间减小工后沉降的效果不明显。
Statistical analysis the tested settlement from 107 monitoring sections in 19 construction sites of surcharge preloading subgrade were performed,which were monitored during construction period of the construction section XXTJⅡ in Wuhan-Guangzhou high-speed railway.The characteristics of subgrade settlement and settlement rate were investigated.Monitored ground settlement under subgrade during construction period was only 3.0-9.5 mm,indicates ground improvement schemes in these 19 construction sites were reasonable and controlled effectively the ground settlement;Most of ground settlement occurred within the first month after surcharge perloading,which shows the effect of reducing settlement after construction by prolonging preloading time is unconspicuous when perloading period exceeds 3 months.
出处
《铁道科学与工程学报》
CAS
CSCD
2010年第2期93-97,共5页
Journal of Railway Science and Engineering
基金
铁道部重点项目(2005K002-B-6)
关键词
高速铁路
实测沉降
堆载预压
沉降统计
high-speed railway
subgrade settlement
surcharge preloading
settlement statistics
