基于传感器监测的柔性基层沥青路面合理性论证

Proof on Rationality of Flexible Base Asphalt Pavement Depending on Sensor Monitoring

作为一种新型的沥青路面,柔性基层沥青路面一直因力学状况与实际的吻合性不明确而使应用受阻.以广州某工程为依托,选取三种典型的柔性基层沥青路面,采用Bisar 3.0与Matlab7.0相结合,全面分析路面的受力状况,并通过在现场埋设应变片,实时监测路面应力水平并与理论计算结果相对比.结果表明:轮隙中心是柔性路面弯拉应力与弯拉应变的峰值所在点;面层层底为柔性路面高弯拉响应的集中层位,面层顶部为结构受剪高峰;现场实测的试验路湿度数据与室内试验的含水量、密度结果相关性好;室外应力检测数据与室内计算结果的规律吻合、数量级相同,实际验证了理论计算结果.

As a new type of asphalt pavement, application of flexible pavement is hindered from applying for the inconsistency between mechanical condition and practice. Based on west second ring road of Guangzhou city, the paper chose three kinds of typical flexible base asphalt pavement,making use of the software including bisar 3.0 and Matlab 7.0 to analysis the mechanical condition comprehensively. In addition, by means of inbuilt strain foil in field to monitor pavement stress level in time and com- pare with theoretical results. The results showed that middle of tire gaps was the peak point of ben- ding-tensile stress and bending-tensile strain for flexible pavement; bottom of surface layer was the layer whose bending-tensile stress was maximum for flexible pavement while top of surface layer was the layer whose shearing stress was the highest; there showed well relativity between humidity data tested from field and liquid water content,density obtained from indoor test; Outdoor stress data was in accordance with indoor results on choosing regular and order, which proofed the theoretical result.