水泥稳定碎石基层构造特征对路面结构层力学响应的影响  

Influence of Structural Characteristics of Cement Stabilized Crushed Stone Base Layer on Mechanical Response of Pavement Structure

作　　者：王利娟 WANG Lijuan(Suqian Traffic Engineering Project Management Co.,Ltd.,Suqian,Jiangsu 223800,China)

机构地区：[1]宿迁市交通工程项目管理有限公司,江苏宿迁223800

出　　处：《黑龙江交通科技》2024年第11期27-31,共5页Communications Science and Technology Heilongjiang

摘　　要：为研究不同水泥稳定碎石基层对路面结构受力特征的影响,通过路基模型实验,分析了不同基层结构类型、基层厚度对路面结构内部力学特征分布规律的影响,探讨了路面结构内部变形发展规律。研究结果表明:(1)当基层厚度为40 cm时,距路表面70 cm处的横向应力较距路表面5 cm处增加6.1倍。在距路表面45 cm处,基层厚度为40 cm的路面横向应力较基层厚度为30 cm时减小31.67%。(2)随着距路表面距离的增加,不同基层厚度路面结构层内部的竖向剪切应力逐渐降低;在距路表面30 cm处,基层厚度为40 cm的路面纵向应力较基层厚度为30 cm时减小40.42%。(3)随着基层厚度的增加,路面结构内部的纵向变形逐渐减小,在距路表面25 cm处,基层厚度为40 cm的路面纵向应力较基层厚度为30 cm时减小25.33%。(4)为保证水泥稳定碎石基层路面结构纵横向及剪切应力在规定范围内,宜选用较大粒径水稳碎石基层结构,将水泥稳定碎石基层厚度设置为30~40 cm。In order to study the influence of different cement stabilized macadam base on the mechanical characteristics of pavement structure,and studies the mechanical characteristics of pavement structure by the roadbed model experiment,and analyzes the influence of different base structure types and base thickness on the distribution law of internal mechanical characteristics of pavement structure,and probes into the development law of internal deformation of pavement structure.The results show that:(1)When the thickness of base course is 40 cm,the transverse stress at 70 cm is 6.1 times higher than that at 5 cm.At the distance of 45 cm from the road surface,the transverse stress of the road surface with the base thickness of 40 cm decreases by 31.67%compared with that with the base thickness of 30 cm.(2)With the increase of the distance from the road surface,the vertical shear stress in the pavement structure layer with different base thickness decreases gradually,and at the distance of 30 cm from the road surface,the longitudinal stress of the pavement with 40 cm base thickness is 40.42%less than that with 30 cm base thickness.(3)With the increase of the thickness of the base course,the longitudinal deformation of the pavement decreases gradually.At the distance of 25 cm from the pavement surface,the longitudinal stress of the pavement with the thickness of the base course 40 cm decreases by 25.33%compared with that with the thickness of the base course 30 cm.(4)In order to ensure that the longitudinal and transverse stress of cement stabilized macadam base pavement structure and shear stress are within the specified range,it is appropriate to select the larger particle size water stabilized macadam base structure,and the thickness of cement stabilized macadam base is set at 30~40 cm.

关 键 词：水泥稳定碎石基层 路面结构 纵向应力 剪切应力 纵向变形 

分 类 号：U416.1[交通运输工程—道路与铁道工程]