摘要
为分析EPS板的减荷机理与效果,通过室内模型试验,研究了不同密度、不同厚度的EPS板对高填方涵洞卸载效果的影响.结果表明:①马斯顿效应会对涵洞顶部产生较大的附加应力,在涵洞顶部铺设EPS板可以有效地减小涵洞顶部土压力;②沉降过程中土体内部形成了土拱效应,造成了土体内部应力重分配;③EPS板密度越小、厚度越大,对涵洞顶部应力的减小效果越明显;④EPS板有明显的蠕变效应,可为涵洞提供长期减荷环境.
In order to analyze the load reduction mechanism and effect of EPS slab,the influence of EPS slab with different density and thickness on the load reduction effect of high fill culvert was studied through indoor model test.The results show that:①Maston effect will produce greater additional stress on the top of culvert,and laying EPS slab on the top of culvert can effectively reduce the earth pressure on the top of culvert.②During the settlement,the soil arching effect is formed inside the soil,which results in the redistribution of stress inside the soil.③The smaller the density and the larger the thickness of EPS slab,the more obvious the stress reduction effect on the top of culvert.④EPS board has obvious creep effect,which can provide long-term load reduction environment for culverts.
作者
罗吕青
张谢东
李彬
晓夏
刘建平
黄笑犬
LUO Lyuqing;ZHANG Xiedong;LI Bin;XIAO Xia;LIU Jianping;HUANG Xiaoquan(Wuhan Municipal Engineering Design and Research Institute Co.Ltd.,Wuhan 430023,China;School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2022年第2期308-312,共5页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
关键词
高填方涵洞
EPS板
减荷设计
土拱效应
high fill culvert
EPS slab
load reduction design
soil arching effect
