现代交通技术2025，Vol.22Issue(2)：1-8,8.
高速公路桩承加筋对拓宽路堤变形控制效果的现场试验研究
Field Experimental Study on Deformation Control Effect of Pile-supported Reinforced Widened Embankments for Expressways
摘要
Abstract
In order to clarify the control effect of pile-supported reinforced treatment on settlement deformation of widened em-bankment,the field experiment of pile-supported reinforced widened embankment of Wuhu-Hefei Expressway was carried out.The pile-soil pressure,pore water pressure,foundation settlement deformation and horizontal displacement of slope toe during filling and preloading period were monitored,and the influence of filling height and pile spacing on soil arching effect and de-formation control effect of pile-supported reinforced embankment was analyzed.The results show that the development process of soil pressure during embankment filling pile mainly includes three stages:the formation of soil arching effect,the exertion of soil arching effect and the stabilization of preloading consolidation.Under the same pile spacing,the soil pressure of pile body increases significantly with the increase of filling height,while the increase of soil pressure between piles is small,and the pile-soil stress ratio increases by about 1.6.Under the same filling height,with the increase of pile spacing,the soil arc-hing effect is weakened,and the soil load between piles is increased by 12.8 kPa.The pore water pressure in the soft founda-tion shows an intermittent growth trend,the increment of pore water pressure under the action of pile-supported reinforce-ment is only 1/5 of the increment of filling load,and the excess pore water pressure dissipates rapidly during the preloading period,the post-construction settlement and maximum differential settlement of the widened embankment after pile-supported reinforcement treatment meet the requirements of expressway settlement control,which can ensure the stability of the embank-ment slope of the free section.关键词
高速公路/拓宽路堤/桩承路堤/桩土应力/沉降控制Key words
expressway/widened embankment/pile-supported embankment/pile-soil stress/settlement control分类
交通运输引用本文复制引用
于春江,刘文俊,李涛,黄平山,章定文..高速公路桩承加筋对拓宽路堤变形控制效果的现场试验研究[J].现代交通技术,2025,22(2):1-8,8.基金项目
安徽省交通控股集团科技项目(JKKY-2021-19) （JKKY-2021-19）
