不同基层类型水泥混凝土路面温度翘曲脱空研究

结合国内相关标准,文章提出了水泥混凝土路面板翘曲脱空检测方法及判定标准,采用以FWD 24 h连续检测后板角板中弯沉值的方法,对广西地区不同基层水泥混凝土路面进行了脱空检测,对比分析了其各自特点和使用性能之间的差异,以及翘曲脱空现象和成因。同时提出了不同基层水泥混凝土路面脱空检测的要求及合理检测时机。     

FWD在水泥砼路面板底脱空判定中的应用

文章简要分析了水泥混凝土板下基础脱空机理,给出了脱空尺寸与弯沉典型回归关系式,从而能够利用FWD对水泥混凝土路面板底脱空进行快速评定。     

灌浆技术在混凝土路面中的应用

水泥混凝土路面在使用过程中会产生诸多病害,通过对旧水泥混凝土路面板唧泥、脱空等混凝土路面主要病害的分析,提出采用灌浆技术来解决此类病害.并对脱空的确定、灌浆加固机理、实施等进行了较详细的介绍和分析.     

南宁某市政道路沥青路面病害调查及分析

文章通过对南宁市某市政道路"白改黑"后沥青路面出现的大规模病害进行调查,分析了该市政道路主要病害类型及损坏特征,探讨了路面空隙率、基层强度、旧水泥混凝土板脱空等性能指标与路面损坏之间的关系,可为市政道路"白改黑"设计及施工提供参考。     

灌浆技术在水泥混凝土路面养护中的应用

水泥混凝土路面病害较多,对水泥混凝土面板唧泥、脱空主要病害原因进行分析,并提出用灌浆技术进行养护是经济可行的。     

板底灌浆处置混凝土路面脱空探讨

板底灌浆技术作为预防性养护手段,可广泛用于水泥混凝土路面脱空病害处置。文章探讨灌浆技术在广西沿海高速公路的应用,分析了路面脱空的原因和判定方法,总结了板底灌浆的技术控制和管理经验,为同类施工提供参考。     

压浆技术对水泥混凝土路面板底脱空的处治

板底脱空对水泥混凝土路面有很大的损坏.针对这一现象,利用压浆技术处理此类病害,投资小,见效快.     

水泥路面断板关键影响因素调查及分析

文章选取广西地区通车10年以上的2条水泥混凝土高速公路,抽取了16个不同断板率的水泥混凝土路面典型路段,进行钻芯取样及FWD弯沉检测分析,计算了各典型路段的基层顶当量回弹模量代表值、接缝传荷系数、路面脱空率及路面的弯拉强度。研究结果表明:接缝传荷系数和水泥路面断板率相关性较高,相关系数达到0.74。研究成果对新建水泥路面、水泥路面维修及加铺沥青层具有指导意义。     

化学灌浆处理水泥砼路面板底脱空方法

文章针对广西柳州-王灵高速公路水泥砼路面板底存在脱空问题,分析了病害产生的原因,介绍了应用化学灌浆处理时从灌浆材料、设备的选定,到施工工序,质量检查,处理效果及方法的过程,提出了处理工程中还存在的问题及对策,对处理水泥砼路面板底脱空及改善路面的使用性有一定的参考意义。     

高速公路路面结构脱空病害处理措施探讨

高速公路经过长时间运营会出现病害问题。结合具体的高速公路养护工程实例,简要探讨路面结构脱空病害处理方案,并详细介绍施工的具体过程,希望能对类似工程起到借鉴作用。     

The effect of time on acoustic durability of low noise pavements – The case studies in Poland

The tyre/road noise depends on type and speed of vehicles and on the characteristics of road pavement. Vehicle traffic load and weather conditions lead to significant changes in the characteristics of the materials used to build the wearing course. This applies especially to road pavements with the increased void contents. Clogging of the pores, changes in the characteristics of the binder and the damage to the wearing course influence changes in the acoustic properties of the road pavement over time. The article presents the results of the studies on noise level carried out in 2011 and 2014 by the Statistical Pass-By method (SPB) on porous asphalt concrete (PAC), very thin asphalt concrete (VTAC) and stone mastic asphalt (SMA). The wearing courses with the increased void contents immediately after building constitute a very advantageous solution compared with traditional road pavements (dense asphalt concrete, stone mastic asphalt). However, the unfavourable location of the road with porous wearing course, lack of systematic cleaning of porous layers or inappropriate maintenance methods in winter lead to the loss of the acoustic durability of low-noise pavements within a few years of their exploitation.     

Modelling of the pavement acoustic longevity in Hong Kong through machine learning techniques

Traffic noise emission has long been a pervasive environmental and ecological problem, especially in the metropolitan cities with large-scale traffic network and high population density. Low noise road surface (LNRS) has been actively developed and applied as an effective measure to maintain the quieter environment of mobility service system. However, when LNRS is applied for noise abatement, the relationship between the acoustic performance and degradation of pavement has not been fully understood yet. To this end, this study aims to model the acoustic longevity of asphalt pavement as a function of the thickness, binder content, maximum aggregate size, and air void content of the pavement surface, as well as vehicle speed based on the long-term tyre-road noise data collected from 270 asphalt pavement sections in Hong Kong. Two machine learning techniques, namely artificial neural networks (ANN) and support vector machines (SVM), were employed and compared. It was found that both ANN and SVM could successfully model the pavement acoustic performance with acceptable model performance metrics. A case study showed that the ANN model was more aligned with the aging mechanisms of porous road surface, but the SVM model showed better training performance. The predicted acoustic deterioration rates of the porous surface case varied from −0.1 to 0.28 dB(A)/month rather than keeping a constant linear increasing trend, depending on pavement ageing periods and vehicle speed levels. The two-dimension sensitivity analysis (2D-SA) revealed the relative importance of pavement age and vehicle speed in controlling the acoustic performance.     

沥青路面平整度影响因素分析及控制策略

路面平整度是评价路面使用性能的一个重要指标,优良的路面平整度能保证大量车辆高速、舒适、安全地通过,因此路面平整度的改善和提高一直作为沥青路面施工中的一项关键技术而受到道路科技界关注和重视,认真分析探讨影响道路平整度的因素,提出应予重视、改善和提高平整度的技术措施非常必要。     

重载交通长寿命半刚性基层沥青路面浅析

长寿命沥青路面是当前国际上备受重视的一种新的路面设计理念。文章通过分析世界各国长寿命路面的研究成果,探讨路面设计方法及施工工艺,提出了基于长寿命半刚性基层的沥青路面设计理念和施工要求。     

透水性路面及其铺面材料分析

我国新近应用的透水性路面具有很好的工程前景。在简介透水性路面的基础上,重点介绍了透水沥青混合料、透水水泥混凝土、透水路面砖等三种透水性铺面材料及其设计与生产,从工程应用角度分析了其强度特性与耐候性,探讨了其常见病害与维护、维修方法。     

基于沥青路面性能的预防性养护时机确定方法

文章结合我国公路事业发展的现状,提出了基于路面破损状况、路面透水性指标、路面车辙指标、路面平整度指标的综合评价指标体系,并给出沥青路面预防性养护时机的确定方法及对策。     

柳南路路面加铺改造方案探析

在旧水泥混凝土路面上加铺沥青面层能有效改善路面使用性能和提高承载能力、延长服务年限,是一种常用的、有效的路面修复技术。文章介绍了广西柳州至南宁高速公路原水泥路面的技术状况,通过对多种沥青加铺方案的比选论证,提出了合理可行的加铺改造方案,为类似工程提供参考。     

不同沥青路面结构抵抗车辙性能理论计算分析

车辙是沥青路面早期损坏主要形式,特别在陡坡及超载的条件下,沥青路面车辙病害更为突出。文章拟定了5种沥青路面结构组成,建立有限元模型计算了各种沥青路面结构的力学参数,对各种路面结构抵抗车辙的性能进行了分析对比。