摘要
为探究半填半挖式泡沫轻质土路堤在填筑过程中的沉降与变形发展规律,基于广连高速TJ05标段某路基填筑工程,通过现场监测试验对泡沫轻质土路堤的深层水平位移、分层沉降和剖面沉降规律进行分析。研究结果表明:填筑期间轻质土路堤在底部的水平位移最小、顶部最大,深层水平位移沿着埋深方向呈现为线性分布;分层沉降沿埋深方向呈线性分布,埋深越深沉降量越大;随着测试点距路肩位置的增大,剖面沉降量逐渐减小,整体上沿横向呈勺形分布;填筑体在填筑初期变形速率较快,后期变形增长逐渐放缓最终趋于稳定;由于地基土性质不同,非桥台段路堤的变形整体略大于桥台段的变形。
In order to explore the deformation development law of the semi-filled and semi-excavated foam lightweight earth embankment during the filling process,based on a subgrade filling project in the TJ05 section of Guanglian Expressway,the deep horizontal displacement,layered settlement and section settlement law of lightweight earth embankment were analyzed by field monitoring tests.The research results show that during the filling period,the horizontal displacement of the light soil embankment is the smallest at the bottom and the largest at the top,and the horizontal displacement of the deep layer shows a linear distribution along the buried depth;The layered settlement is linearly distributed along the buried depth,and the deeper the buried,the greater the amount of settlement;As the distance between the test point and the shoulder of the road increases,the settlement of the profile gradually decreases,and it is distributed in the shape of a spoon in the horizontal direction as a whole;The deformation rate of the filling body is relatively fast in the initial stage of filling,and the deformation growth gradually slows down in the later stage and finally stabilizes;Due to the different nature of the foundation soil,the overall deformation of the non-abutment section of the embankment is slightly larger than that of the abutment section.
作者
薛国毛
赵弟彬
谢规球
李繁
XUE Guomao;ZHAO Dibin;XIE Guiqiu;LI Fan(CCCC Fourth Highway Engineering Co.,Ltd.,Beijing 100022,China;School of Civil Engineering,Central South University,Changsha 410075,China)
出处
《江西冶金》
2021年第5期66-73,共8页
Jiangxi Metallurgy
基金
湖南省自然科学基金资助项目(2020JJ4743)。
关键词
半填半挖
泡沫轻质土
路堤
水平位移
分层沉降
剖面沉降
half fill and half excavation
foam light soil
embankment
horizontal displacement
layered settlement
profile settlement
作者简介
薛国毛(1988—),男,工程师,主要从事桥隧及道路工程施工管理方面的研究。E-mail:941873360@qq.com。
