论车速及轴向荷载作用下的路基变形  

On Subgrade Deformation Under the Action of Speed and Axial Load

作　　者：罗丽香 Luo Lixiang(Hunan Expressway Huada Engineering Co.,Ltd.,Changsha,China)

机构地区：[1]湖南高速华达工程有限公司,湖南长沙

出　　处：《科学技术创新》2023年第5期183-186,共4页Scientific and Technological Innovation

摘　　要：结合实例项目正常路基及缺陷路基为具体案例,综合比较了受不同车速及轴向荷载影响得到的各项纵、横向变形数据,而得出的结论为:(1)在汽车行进及道路横断面方向,若行车荷载变大,则路基变形更为明显,当车速加快时,形变量会变小;(2)如果行车轴向荷载增至185 KN,车速在40 km/h、60 km/h、80 km/h时,相比存在问题的路基,正常路基的形变量大约会下降一半;(3)车辆匀速行驶,在行车方向上,路基受不同类型轴向荷载的影响,其形变量曲线一致,若车速不变,则曲线不会改变;(4)在车速为40 km/h时,该曲线会变为“w”形,增至60 km/h和80 km/h时,曲线呈“V”形。Takes the normal subgrade and the defective subgrade of the example project as a specific case,and comprehensively compares the longitudinal and transverse deformation data of each item under the influence of different vehicle speeds and axial loads,and draws the following conclusions:(1)In the direction of vehicle travel and road cross section,if the vehicle load increases,the subgrade deformation will be more obvious,and when the vehicle speed increases,the deformation variable will become smaller;(2)If the driving axial load increases to 185 KN,and the vehicle speed is 40 km/h,60 km/h,and 80 km/h,the deformation of the normal subgrade will decrease by about half compared with the problematic subgrade;(3)When the vehicle is driving at a constant speed,in the driving direction,the subgrade is affected by different types of axial loads,and its shape variable curve is consistent.If the speed is constant,the curve will not change;(4)When the speed is 40 km/h,the curve will change into a“w”shape,and when it increases to 60 km/h and 80 km/h,the curve will change into a“V”shape.

关 键 词：车速 轴向荷载 路基变形 

分 类 号：U216.417[交通运输工程—道路与铁道工程]