岩溶发育条件下加筋土工格栅对路基变形的防治效果分析  

The Preventive Effect of Reinforced Geogrids on Roadbed Deformation under Karst Development Conditions

作　　者：易清曦 刘泽[1] 何瑾 汤中华 

机构地区：[1]湖南科技大学,土木工程学院,湖南 湘潭 [2]浙江交工国际工程有限公司,浙江 杭州

出　　处：《土木工程》2024年第2期190-199,共10页Hans Journal of Civil Engineering

摘　　要：采用FLAC3D建立岩溶路基模型,分析了溶洞发育过程中路基的变形规律和采用加筋进行处治的作用与影响因素。结果表明:溶洞顶板和路基顶面竖向位移会随溶洞跨度的增加而增大,当溶洞跨度达到一定程度后路基会发生沉陷破坏;在路基内加筋土工格栅能有效减弱溶洞发育对路面沉降的影响,且在提高路基稳定性的同时使得路基具有了一定的沉陷预警能力;筋材宜布置在路基底部,增加加筋层数和减小加筋间距对控制溶洞发育引起的路面沉降有明显影响。A karst roadbed model was established using FLAC3D, and the deformation law of the roadbed during the development of karst caves and the effect and influencing factors of reinforcement treatment were analyzed. The results show that the vertical displacement of the top plate of the karst cave and the top surface of the roadbed will increase with the increase of the karst cave span. When the karst cave span reaches a certain degree, the roadbed will undergo settlement and damage;Reinforcing geogrids inside the roadbed can effectively reduce the impact of karst cave development on road settlement, and improve the stability of the roadbed while giving it a certain degree of settlement warning ability;reinforcement materials should be arranged at the bottom of the roadbed, and increasing the number of reinforcement layers and reducing the spacing between reinforcements have a significant impact on controlling road settlement caused by karst cave development.

关 键 词：岩溶路基 土工格栅 数值模拟 

分 类 号：U41[交通运输工程—道路与铁道工程]