基于PFWD的水泥路面板底脱空评定可行性研究  

Feasibility study of void evaluation beneath cement slabs based on PFWD

作　　者：顾兴宇[1] 袁青泉[1] 倪富健[1] 

机构地区：[1]东南大学交通学院,江苏南京210096

出　　处：《合肥工业大学学报（自然科学版）》2011年第5期729-733,共5页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省交通科技进步基金资助项目(0813)

摘　　要：文章采用PFWD检测了水泥混凝土路面板不同位置处的实际弯沉值,应用统计学理论验证了界首-阜阳-蚌埠高速公路水泥混凝土路面板底脱空遵循横缝不设传力杆的混凝土板脱空发展一般规律,并由此确定了板中不脱空对应的弯沉值;通过三维有限元模拟计算,分析了不同脱空尺寸下不同位置的理论弯沉,得到脱空面积与弯沉量的回归计算式,最终确立了板边板角脱空的弯沉指标。工程实测表明该方法准确有效,可用于水泥混凝土路面脱空的快速评定。The deflections of different positions of cement concrete slabs were detected by portable falling weight deflectometer（PFWD）.By using the method of statistics,it is verified that the void progression beneath cement concrete slabs of Jieshou-Fuyang-Bengbu freeway follows the general law of that of concrete slabs without dowel bar,and the deflection of center of slabs without void is determined.By using the finite element method,the theoretic deflections of different positions with different void sizes are analyzed,and the regression formula of void area and deflection is established,then the deflection indexes of slab corner and edge used for void evaluation are determined.Engineering test shows that the method is accurate and effective,and can be used for the quick void evaluation of cement concrete pavement.

关 键 词：水泥混凝土路面 脱空评定 手持落锤式弯沉仪 弯沉检测 可行性研究 

分 类 号：U416.216[交通运输工程—道路与铁道工程]