摘要
研究目的:高速铁路对路基工程工后沉降控制十分严格,路基工程工后沉降主要为铁路铺轨完成后地基的残余沉降。石家庄—武汉高速铁路设计标准为时速350 km,全线无砟轨道。为研究地基加固措施的科学性,在建设过程中,选取代表性试验工点对复合地基沉降进行监测和研究。研究结论:采用桩+板结构和CFG桩复合地基联合堆载预压措施加固深厚松软土地基,施工期沉降约占最终总沉降的72%～85%,有效地控制了路基工后沉降,整个区段内纵向沉降较为均匀,符合区段路基铺设无砟轨道要求,加固措施有效可行。
Research purposes： High speed railway needs a very strict control of post - construction subgrade settlement. The post -construction subgrade settlemen mainly refers to the residual subgrade settlement after the track is laid. The design speed of the Shijiazhuang - Wuhan high - speed Railway is 350 km/h with the ballastless track. During the construction, the monitoring and research were done on the subgrade settlement in the tested section in order to research the scientificness of reinforcing suhgrade. Research conclusions：The pile ＋ plate structure and CFG pile composite foundation was used for reinforcing the deep soft soil foundation along with the heap pre -loading. The settlement volume during construction was up to the 72% - 85% of the total settlement volume, so the post - construction settlement was effectively controlled. The vertical settlement of the foundation in the whole section was even and it met the demand of laying the ballstless track and proved the reinforcement measures were feasible.
出处
《铁道工程学报》
EI
北大核心
2012年第6期45-49,共5页
Journal of Railway Engineering Society
关键词
高速铁路
无砟轨道
地基处理
工后沉降
沉降监测
沉降预测
high - speed railway
ballastless track
foundation treatment
post - construction settlement
settlement monitoring
settlement prediction
