路用水基聚合物稳定基层材料力学性能及路面结构分析  

Hydro-Radical Polymer Stabilized Base Material Mechanical Properties and Pavement Structure Analysis

作　　者：张敏江[1] 赵云龙[1] 于保阳[1] 欧培冬[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2012年第6期1030-1036,共7页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(40673045);辽宁省交通厅重点科研项目(201112)

摘　　要：目的研究SRX稳定基层材料力学性能和SRX柔性基层沥青路面结构力学响应规律,验证SRX稳定材料是否可以用作路面基层,并为SRX柔性基层沥青路面结构设计提供理论依据.方法通过室内试验确定SRX稳定基层材料的CBR值和回弹模量,应用BISAR软件对SRX柔性基层和半刚性基层沥青路面结构进行力学响应分析,并以此计算结果对两种路面结构的疲劳寿命进行分析.结果 SRX柔性材料的加州承载比(CBR)值为227.85;SRX柔性材料的回弹模量为520 MPa;两种路面结构在水平应力分布、结构层内应变分布、路面剪应力分布、弯沉和土基顶面压应变及重载敏感性等方面有各自的特点.结论 SRX稳定材料可以用作路面基层;在路面结构设计时,SRX柔性基层路面要注意底基层的疲劳破坏;半刚性基层的疲劳寿命较SRX柔性基层对轴载更加敏感.Through the study of SRX stabilized base material mechanical properties and SRX flexible base asphalt pavement structural mechanics response results,the aim of this paper is to verify whether the SRX stable material can be used as pavement base layer,and to provide a theoretical basis for the SRX flexible base asphalt pavement structure design.The CBR value and modulus of resilient of SRX stabilized base material were determined by indoor test,application of BISAR software on SRX flexible base asphalt pavement structure and semi-rigid base asphalt pavement structure to analyze the mechanical response,according to the calculation results,two kinds of pavement structure fatigue life were analyzed.The results have shown that the California bearing ratio（CBR） value of SRX flexible material is 227.85,the modulus of resilience of SRX flexible material is 520 MPa;Two kinds of pavement structure of each has its own characteristics on horizontal stress distribution,structure layer strain distribution,pavement shear stress distribution,deflection and compressive strain on top of subgrade soil and heavy load sensitivity.The conclusion is that SRX stable material can be used as pavement base,but in pavement structure design,the fatigue performance of SRX flexible base materials should be paid much attention;Relative to the SRX flexible base,the fatigue life of semi-rigid base of axle load is more sensitive.

关 键 词：SRX CBR 天然砂砾 强度 力学响应 

分 类 号：TM282[一般工业技术—材料科学与工程] TU375[电气工程—电工理论与新技术]