动态重载对高速公路加宽工程路面结构受力的影响研究

打开文本图片集

【中图分类号】：U416 【文献标志码】：A 【文章编号】：1008-3197（2025）06-21-04

【DOI编码】：10.3969/j.issn.1008-3197.2025.06.005

Study on the Influence of Heavy Dynamic Loads on the Stress of Pavement Structuresin Expressway Widening Projects

WANGPengfei1，LIUYuchen²，LIYuxin1

1.ChinaRailway14thBureauGroup2ndEngineringCo.，Ltd.，Taian27o，China;2.TanjinExpresswayGroupCo.，Ld.，ajin 300384，China）

【Abstract】：Inorder to explore the efectofheavydynamic loadonthemechanical characteristicsof the pavementof expressway widening project，the finite element method was used to calculate and analyze the maximum tensile stress of pavement surface layer，base and subbase under different setlement and axle load conditions，and theeffctsofdynamic loadand staticload was compared.Theresults show that themaximum tensile stress of eachstructural layer of the widened expressway pavement significantly increases with the increaseof diferential settlementandaxle load.Withoutconsidering dynamic additionalloads，the maximum tensile stress generated by moving loads on the pavement structure layer is lessthanthatof static loads.When considering dynamic additional loads，the maximum tensile stress on the pavement surface，base and subase of expressway widening projects underdifferent axle loads and differential setlement conditions is much greater than thatunder static loads.

【Key words】：expressway； heavy load；pavement widening；diffrential settlement；dynamic load

目前我国沥青路面设计与计算分析通常将车辆荷载视为静载处理；但高速公路路面不是绝对平整的，车辆行驶过程中不可避免地会发生振动，从而产生动态荷载，即车辆荷载施加给路面结构的是一种动态荷载2。（剩余3445字）