拓宽公路差异沉降问题的研究现状与成果综述  

Research Status and Achievements Summary of Differential Settlement in Road Widening

作　　者：庞军 吴红刚 秦昌乐 马彦军 丁鸿程 PANG Jun;WU Honggang;QIN Changle;MA Yanjun;DING Hongcheng(School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Northwest Research Institute Co.,Ltd.of CREC,Lanzhou 730030,China)

机构地区：[1]兰州交通大学土木工程学院,兰州730070 [2]中铁西北科学研究院有限公司,兰州730030

出　　处：《路基工程》2024年第4期1-10,共10页Subgrade Engineering

基　　金：国家重点研发计划(2018YFC1504903);甘肃省自然科学基金(21JR7RA738)。

摘　　要：为系统地了解拓宽公路工程中差异沉降问题的研究现状和成果,有序梳理1997—2021年间的576篇相关文献,总结拓宽公路差异沉降问题研究的发展历程、主要研究内容和实际工程案例。归纳拓宽公路差异沉降的影响因素,提出按照内因、外因、直接因素和间接因素进行分类的方法;整合各因素对差异沉降曲线的影响规律和特征,建立差异沉降双向变化型、单向局部变化型和单向整体变化型三种曲线概化模型;总结差异沉降对路面结构层应力的影响规律;确定新旧路面拉应力的控制层位置,建立差异沉降控制标准计算的概化思路;整理差异沉降减控技术的种类,比较各减控技术的适用性和优缺点。基于研究现状,展望新旧路基顶面差异沉降的研究方向。In order to systematically understand the status quo and achievements of the research on differential settlement in road widening engineering,576 related articles in 1997-2021 were sorted,and the development history,the main research contents and the actual project cases of this issue were summarized herein.Depending on the induction of the factors influencing differential settlement in road widening engineering,the method classifying the internal and external factors,and the direct and indirect factors was put forward.By integrating the rules and features of every factor influencing the differential settlement curve,the generalized model incorporating three patterns of differential settlement curve,i.e.bidirectional variation,unidirectional local variation and unidirectional global variation,was built.The influence law of differential settlement on the stress of pavement structure layer was concluded.The position of the layer controlling tensile stress between the new and old pavement was determined,and the generalized guideline to calculate the criteria controlling differential settlement was established.In addition,the variety of techniques decreasing and controlling differential settlement were sorted out so as to compare the applicability,advantages and disadvantages of each technique.On the basis of the research status,the direction of research on differential settlement of top surface of new and old subgrade was prospected.

关 键 词：道路拓宽 差异沉降 研究成果 曲线模型 控制标准 减控技术 

分 类 号：U416.12[交通运输工程—道路与铁道工程]