旧水泥路面结构承载能力评估的温度影响分析  

Analysis of the Influence of Temperature on the Evaluation of the Structural Bearing Capacity of the Old Cement Concrete Pavement

作　　者：孟宪金[1] 王琪 李洋[2] MENG Xianjin;WANG Qi;LI Yang(School of Civil and Transportation Engineering,Yellow River Conservancy Technical Institute,Kaifeng 475004,China;Henan University,Kaifeng 475001,China)

机构地区：[1]黄河水利职业技术学院土木与交通工程学院,开封475004 [2]河南大学,开封475001

出　　处：《交通工程》2025年第3期1-6,共6页Journal of Transportation Engineering

基　　金：国家自然科学基金项目(项目编号:52478166)。

摘　　要：为探究水泥混凝土路面动态弯沉受温度影响的规律,对水泥混凝土路面的结构承载能力作出更准确的评价,采用FWD对水泥混凝土路面在不同温度梯度下的弯沉值进行测量,分析不同温度梯度下水泥混凝土路面的弯沉变化情况,同时探究弯沉变化对水泥混凝土路面的接缝传荷能力、基层顶面当量回弹模量及水泥混凝土面板强度、刚度评估的影响。研究结果表明:水泥面板内部温度梯度的存在将导致板中、板边、板角弯沉值产生较大变化;水泥面板的最大温度梯度和弯沉最大变化值并不出现在水泥路面路表温度最高或最低的时间段;利用温度梯度对弯沉影响的差异性、延时性和有效性的特点,可在不同的时间段对板中和板边、边角弯沉分别或集中进行测试;水泥面板接缝传荷能力受水泥面板内部的温度梯度影响较大;水泥面板内部温度梯度对弯沉盆面积指数这一参数基本没有影响;水泥面板处于正温度梯度时将导致水泥面层层下结构强度评估结果偏低;可用水泥混凝土面层弯拉弹性模量、接缝传荷系数、弯沉盆面积指数和基层顶面当量回弹模量综合评价水泥混凝土路面的结构承载能力。To explore the law of dynamic deflection of cement concrete pavement affected by temperature and make a more accurate evaluation of the structural bearing capacity of cement concrete pavement,FWD is used to measure the deflection value of cement concrete pavement at different temperatures and analyze.The deflection changes of cement concrete pavement under different temperatures,and the influence of deflection changes on the joint load transfer capacity of cement concrete pavement,the equivalent elastic modulus of the top surface of the base course,and the strength and rigidity of cement concrete slabs are also explored.The research results show that the existence of the internal temperature gradient of the cement panel will cause large changes in the deflection values of the middle,the edge and the corner of the board,the maximum temperature gradient and the maximum deflection value of the cement panel do not appear in the surface temperature of the cement pavement.The highest or lowest time period,using the characteristics of the difference,time delay and effectiveness of the temperature gradient s influence on the deflection,the deflection of the board,the board edge,and the corners can be tested separately or collectively in different time periods.The load transfer capacity of the cement panel joints is greatly affected by the temperature gradient inside the cement panel;the internal temperature gradient of the cement panel basically has no effect on the parameter of the deflection basin area index,when the cement panel is in a positive temperature gradient,it will cause the cement surface layer to be underneath.The structural strength evaluation result is low,the structural bearing capacity of cement concrete pavement can be comprehensively evaluated by the flexural modulus of elasticity of cement concrete surface course,the joint load transfer coefficient,the deflection basin area index and the equivalent elastic modulus of the base course top surface.

关 键 词：水泥路面 FWD 弯沉 温度 结构承载能力 

分 类 号：U416[交通运输工程—道路与铁道工程]