基于动变形控制法的软岩路基填筑材料回弹模量控制  

The Control of Resilient Modulus of Soft Rock as Filling Material for Subgrade Based on Dynamic Deformation Control Method

作　　者：詹永祥[1] 龙小波 姚海林[1] 张静波[3] 陈羽 

机构地区：[1]中国科学院武汉岩土力学研究所,岩土力学与工程国家重点实验室,武汉430071 [2]武汉新华园置业有限公司,武汉430035 [3]中交第二公路勘察设计研究院有限公司,武汉430056 [4]贵州高速公路集团有限公司,贵阳550004

出　　处：《上海交通大学学报》2017年第4期450-455,共6页Journal of Shanghai Jiaotong University

基　　金：国家重点基础研究发展规划(973)项目(2013CB036405);国家自然科学基金项目(41402317,41472290,41672312);贵州省交通运输厅科技项目(2014-122-007);中国科学院科技服务网络计划(STS计划)资助

摘　　要：根据路基路面变形协调原理,结合国内公路相关规范对路面弯沉的控制标准,获得软岩路基顶面动变形允许值;利用传递-反射矩阵方法和叠加原理推导了双轮胎振动荷载作用下弹性层状公路结构的动力响应解;采用Hankel数值逆变换技术计算出实例工程中典型软岩公路路基顶面的动变形,基于动变形控制法确定了不同软岩填筑区域对应填料的回弹模量临界值;根据现有公路规范规定的路基结构层厚度,提出满足动变形条件下的软岩填筑区域所需回弹模量控制要求,并以回弹模量为依据对软岩填料进行了分类.研究成果可为软岩填料分区优化填筑提供指导.Based on deformation compatibil ment tion o under deflection control standard of curren f soft rock subgrade top is obtained. ity principle of subgrad~ t highway related code, and pavement, combined with The theoretical solutio dynamic double-circular loads are derived by using the transmissio superposition principle. The dynamic deformation of soft rock subgrade namic the pave deforma road structures n-reflection matrix method and the top is deduced with inverse Hankel transformation. The critical value of resilient modulus of soft rock filled in area is determined based on the dynamic deformation control method. According to the thickness of the subgrade structure provided by the existing highway code, control requirements of condition of dynamic deformation is put forward, the resilient modulus of the soft rock filler satisfying the and the soft rock filler is classified according to the resili ent modulus. The results of this research can provide guidance for the optimization of the soft rock filler.

关 键 词：软岩路基 动变形控制 层状公路结构 传递-反射矩阵方法 软岩分类 

分 类 号：TU473.1[建筑科学—结构工程]