水泥混凝土路面实测FWD数据与表观路况关系探讨

采用落锤式弯沉仪（FWO）实验数据评价旧水泥混凝土路面的主要范围包括：接缝传荷能力、板底脱空判别、路基强度、混凝土板体刚度、路基路面强度的均匀性等。目前，研究者建立了许多采用FWD数据的评价模型，但实用性欠佳，主要问题在于缺乏基础性的现场实测数据，因而模型的可靠性较差。文中基于某国道水泥混凝土路面的FWD实测数据及大量路况表观调查照片，分析FWD实测参数与旧水泥混凝土路面状况调查实录及测试数据间的某些相关性，探索旧水泥混凝土板的接缝传荷能力、弯曲刚度、综合承载能力等定性或定量的判别方法，提出利用FWD加载中心弯沉值总水平评价旧水泥混凝土路面综合承载能力的设想。

Relationship between FWD Data and Visual Survey Conditions for Cement Concrete Pavement

The main areas that can be evaluated by Falling Weight Deflectometer(FWD)testing of PCC(Portland Cement Concrete)pavement includes:joint load transfer,voids under the slabs,roadbed's strength,slab's rigidity,uniformity of strength for the subgrade and pavement.At present,researchers have developed many evaluation models with the FWD testing data;however,few of them are practical.The main problem is lack of basic in-situ data,so none of the models are feasible without excessive field testing.Based on FWD field testing data and a large number of pictures of a highway,analyzed the relationships between values derived from FWD measurement in-situ and pavement condition data which was collected by means of field visual surveying or testing on an existing PCC pavement of a highway.Some qualitative or quantitative methods for obtaining joint load transfer and pavement stiffness and load-bearing capacity of the existing PCC slab were discussed.The concept of evaluating the overall load-bearing capacity of the pavement structure with a summation of FWD deflections in center of the loading plate is proposed.