旧水泥路面沥青加铺层间防裂抗拉强度指标研究  

Research on Tensile Strength Index of Anti-cracking Interlayer between Old Cement Pavement and Asphalt Overlay

作　　者：袁玉卿[1] 刘凤利[1] 王选仓[2] 

机构地区：[1]河南大学土木建筑学院,河南开封475004 [2]长安大学公路学院,陕西西安710064

出　　处：《郑州大学学报（工学版）》2015年第2期28-32,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：河南省自然科学研究计划资助项目(2011A580001);河南省交通运输厅科技项目(2010PII10);交通部西部交通建设科技项目(200531881213)

摘　　要：为了研究旧水泥路面沥青加铺层间防裂抗拉强度指标,基于APP油毡层间防裂建立模型,进行了力学分析、理论推导、数值模拟,推导出了层间抗拉强度的实用计算式,推荐了强度指标值.结果表明:在小变形的前提下,挠度值与缝宽度、延伸率成正比;防裂夹层所受到的拉力,与缝宽度、路面压力成正比,与延伸率成反比;防裂夹层的拉伸模量在1 000 MPa时经济技术效果最好,最大主应力、等效应力及最大剪应力分别为0.59 MPa,1.02 MPa,0.51 MPa.考虑油毡的通用试验方法及抗拉强度的表示方法,油毡的抗拉强度应不小于300 N/50 mm.To explore tensile strength index of anti-cracking interlayer between old cement pavement and asphalt overlay, based on the special model of APP modified bituminous linoleum reinforced the structure, mechanical analysis, theoretical derivation and numerical simulation were put forward. Then, practical calculation formula of tensile strength of anti-cracking layer was also deduced. Finally, strength index was recommended. In the premise of small deformation, deflection value is proportional to crack width and elongation. Pulling force of anti-cracking sandwich is proportional to crack width and pavement pressure, and inverse to elongation. The anti-cracking interlayer with 1000 MPa modulus can obtain the best economic technology effect, when the maximum principal stress, equivalent stress and maximum shear stress are 0.59, 1.02 and 0.51 MPa, respectively. In consideration of the general test methods and expression, the tensile strength of APP linoleum should be not less than 300 N/50 mm.

关 键 词：道路工程 层间抗裂 加铺层 旧水泥路面 抗拉强度 APP油毡 

分 类 号：U416.2[交通运输工程—道路与铁道工程]