铁道科学与工程学报2018，Vol.15Issue(3)：567-573,7.
高速铁路无砟轨道陡坡路基桩板墙侧向位移的影响分析
Influence analysis of lateral displacement of sheet-pile wall ballastless track in high-speed railway on steep slope subgrade
摘要
Abstract
Ballastless track in high-speed railway has strict requirement on post-construction settlement of subgrade, so it's worth to study the influence of lateral displacement of sheet-pile wall on the settlement of subgrade. By using the finite element numerical analysis and combined with field measurement, based on the point of shoulder sheet-pile wall ,making analysis on the changing law of back earth pressure、size and distribution form of additional settlement of subgrade caused by the displacement of wall and creating functional relationship between additional settlement of characteristic part and lateral displacement of wall top through gradually release the lateral displacement of the wall top. Results suggest that: distribution form of the wall back earth pressure along wall cantilever first increases then decreases, the maximum appeared at the top of the wall under 6~7 m, the soil has entered the active state under the site condition. the additional settlement caused by the lateral displacement of the wall top along the subgrade cross-section approximately is alike triangular distribution and its influence scope is about 17.2 m. on the worksite, analytical relationship between lateral displacement of wall top s and settlement of subgrade surface under the rail nearby the pile e is e=0.4s and the additional settlement of subgrade only account for 13% of post-construction settlement permitted.关键词
高速铁路无砟轨道/工后沉降/路肩桩板墙/墙体侧向位移/路基面附加沉降Key words
ballastless track in high-speed/post-construction settlement/shoulder sheet-pile wall/lateral displacement of the wall/additional settlement of subgrade surface分类
交通工程引用本文复制引用
吴江,张良,周成,罗强,谢涛..高速铁路无砟轨道陡坡路基桩板墙侧向位移的影响分析[J].铁道科学与工程学报,2018,15(3):567-573,7.基金项目
中国中铁股份有限公司科技开发资助项目(2011-3) （2011-3）
