Disease Characteristics and Maintenance Technology of Highway Subgrade and Pavement

In recent years,the subgrade and pavement diseases account for the vast majority of the expressway maintenance diseases,which puzzles many expressway maintenance departments and units.To sustain the continuous development of the expressway,the service level of the expressway is need to be improved,by ensuring the safety of the people,and by providing more convenient services for the people during travel.The technical measures for scientific maintenance of expressway subgrade and pavement diseases were discussed in this paper.Further,this paper discusses the main subgrade and pavement diseases types,and proposed the targeted maintenance methods,which can be as a reference for the expressway maintenance departments.

Discussion on the Application of Highway Maintenance Platform Based on GIS + BIM Technology—Taking Gansu Province as an Example

Gansu Province is a large province in Western China, and its geographical location and economic status are very important. With the state’s attention to the western development, the economy of the western region represented by Gansu Province has developed rapidly, and the construction of roads and other infrastructure has also been developed. Taking Gansu Province as an example, this paper studies and discusses the application of highway maintenance platform based on GIS + BIM Technology. Firstly, this paper expounds the advantages of GIS + BIM Technology in highway construction and maintenance, and analyzes the development status of GIS + BIM Technology;Secondly, it expounds how to solve the problem of highway maintenance from the aspects of GIS + BIM system and its advantages and difficulties in highway maintenance, and briefly explains the difficulties existing in highway maintenance in Gansu Province. Then, starting from the path of GIS + BIM Technology to solve highway maintenance in Gansu Province, this paper analyzes the expected effect of GIS + BIM Technology in highway maintenance in Gansu Province.

Multi-objective optimization in highway pavement maintenance and rehabilitation project selection and scheduling:A state-of-the-art review

The motivation for cost-effective management of highway pavements is evidenced not only by the massive expenditures associated with these activities at a national level but also by the consequences of poor pavement condition on road users.This paper presents a state-of-the-art review of multi-objective optimization(MOO)problems that have been formulated and solution techniques that have been used in selecting and scheduling highway pavement rehabilitation and maintenance activities.First,the paper presents a taxonomy and hierarchy for these activities,the role of funding sources,and levels of jurisdiction.The paper then describes how three different decision mechanisms have been used in past research and practice for project selection and scheduling(historical practices,expert opinion,and explicit mathematical optimization)and identifies the pros and cons of each mechanism.The paper then focuses on the optimization mechanism and presents the types of optimization problems,formulations,and objectives that have been used in the literature.Next,the paper examines various solution algorithms and discusses issues related to their implementation.Finally,the paper identifies some barriers to implementing multi-objective optimization in selecting and scheduling highway pavement rehabilitation and maintenance activities,and makes recommendations to overcome some of these barriers.

Analysis on On-Site Asphalt Pavement Quality Inspection Technology in Highway Engineering

The acceleration of urbanization has promoted the increase in the number of urban highway projects,resulting in an increase of emphasis on the quality of urban highway projects.The quality and safety of highway construction directly affects the driving comfort,safety,and service life after it is put into operation.Among them,asphalt pavement is an important structure in highway construction,and it is also a key link that directly affects the construction quality.In order to ensure the quality of construction,it is necessary to strengthen on-site testing during the construction process to discover problems in time,and to ensure that the construction is up to standard.This paper mainly presents an analysis on the necessity and application of on-site quality inspection technology for asphalt pavement construction of highway engineering,and outlines measures to improve highway engineering construction testing technology.

Discussion on Test and Detection Technology of Highway Asphalt Pavement

The road traffic industry in China has been developing rapidly in recent years.Asphalt has become the main material in road construction because of its seamless connection and short construction period,and it has an important impact on the overall quality of highway construction.Therefore,it is necessary to conduct scientific and reasonable tests and detections for highway asphalt pavement.This paper presents a discussion on the test and detection technology of highway asphalt pavement for future reference.

Applying Geographic Information System (GIS) for Maintenance Strategy Selection

Spatial technologies, such as Geographic Information Systems (GIS), are particularly appropriate for integrating road- way data and enhancing the use and presentation of these data for highway management and operation by using spatial relationships to relate geographic and geometric objects and events. To different degrees, roadway management problems, such as pavement management, involve relations between objects and events located in different spatial positions. Because the data used in the decision-making process have spatial components, the use of spatial technologies emerges as a very appealing alternative. Spatial technologies may enhance the analysis of several transportation-related issues and may improve the quality of the decision-making process. This paper built a GIS based system that provides information for use as a platform on which all aspects of the Pavement Maintenance and Management System (PMMS) process can be built. The resulting system, GPMMS, represents a significant enhancement of all aspects of the PMMS process. A variety of spatially integrated data are important to pavement management decision making. GIS technology is shown to be the most logical way of relating these diverse, but relevant, data. In this paper, 23 sections is selected along the roadways of Nahrain University and all these sections are distresses due to different causes like weathering, ageing, traffic load, and also the bad maintenance, etc. The PSI of these sections in the range between 1 to 4, and most of these sections in the low range (between 1 to 2). That cause of need to future developments including other elements of a road maintenance management system should be considered. Completion of the whole roads database with all the types of surveys recorded i.e. all distresses, construction and maintenance history and so on.

Characteristics of life-cycle carbon dioxide emissions of arterial highway maintenance and the influencing factors

With the focus of highway development transitioning from construction to maintenance,a comprehensive understanding of the characteristics and influencing factors of carbon dioxide(CO_(2))emissions from highway maintenance activities is crucial for formulating effective strategies to promote the low-carbon development of road infrastructure.However,the quantitative relationships between CO_(2) emissions from highway maintenance schemes and factors such as pavement deterioration,traffic volume,and road grade remain unclear owing to a lack of compre-hensive,multi-category,and real data.Using real maintenance data from 340 arterial highway segments in China,this study conducts the life cycle assessment(LCA)to estimate CO_(2) emissions from maintenance activities and examines the primary emission sources among various structural layers and materials.Furthermore,multiple linear regression(MLR)analysis is conducted to investigate the impact of traffic volume,road grade,and pavement deterioration on CO_(2) emissions from maintenance projects,and factors influencing the early-stage degradation of pavement performance.The results demonstrate that average CO_(2) emissions from heavy rehabilitation projects are 6.97 times higher than those from medium rehabilitation projects.Emissions from heavy rehabilitation projects exhibit a significantly negative linear relationship with the riding quality index(RQI)before maintenance(p<0.05),and emissions from medium rehabilitation projects show a significant negative linear relationship with the pavement condition index(PCI)before maintenance(p<0.05).Emissions from heavy and medium rehabilitation projects are significantly positively correlated with heavy vehicle traffic volume before maintenance(p<0.05).Moreover,the early-stage degradation of PCI after heavy rehabilitation and RQI after medium rehabilitation exhibit significantly negative linear relationships with their respective in-dicators before maintenance(p<0.05).The early-stage degradation of RQI after heavy rehabilitation is significantly positively correlated with CO_(2) emissions from the base course and cushion layers(p<0.05).The findings emphasize that timely maintenance and reduction of CO_(2) emissions from asphalt mixing equipment are essential for mitigating emissions from road maintenance.This study offers valuable insights for advancing the low-carbon development of highways in temperate regions.

彩色透水混凝土路面铺装技术在公园工程中的应用

该文将率先介绍彩色透水混凝土路面铺装技术的运用优势,再通过专业的研究与调查,并以某公园工程为例,详细阐述该技术在工程项目中的应用过程,内容包括明确施工操作流程、铺设模板、浇筑混凝土、表面处理及路面养护等,然后借助对混凝土路面的合理规划,探索出改善该施工技术的有效措施,有效增强公园工程路面铺装质量,提升公园内部的美观性、生态性。

沥青路面预防性养护中的微表处技术

公路沥青路面在长期车辆荷载和雨雪侵蚀影响下极易出现不同程度的质量病害,为延长沥青路面使用年限,以山西省G108国道双向四车道公路为例,进行了微表处技术的施工技术流程、施工质量控制对策和微表处施工性能研究。结果表明微表处技术能提高沥青路面养护水平,降低路面病害发生,提高路面耐久性及行车舒适性,为公路交通稳定发展形成保障。

高速公路养护施工中沥青路面技术状况预测方法研究

为直观掌握公路沥青路面的性能变化情况,使高速公路的养护施工方案具备明确的参考信息,对沥青路面的技术状况做出合理科学的预测,该文针对常见的高速公路沥青路面病害特征进行总结,同时以昭通市农村公路养护工程项目为例采用马尔可夫模型进行预测和分析。最终得出,基于灰色马尔可夫模型对昭通市农村公路路面技术状况的预测指标与公路实际运行状态相符合,经过相应养护过后,路面性能指标得到显著优化。因此,通过对高速公路路面性能预测模型进行构建,能够较为直观地针对沥青路面性能指标做出评价、分析与预测,同时结合实际给出相应的养护方案建议,对提升高速公路运行安全性能,延长高速公路运行寿命具有关键性意义,值得推广和运用。

微表处技术在高速公路养护中的应用

微表处技术是我国公路养护中常用的方法,由于成本低廉、交通封闭时间短、环境污染性小而受到公路养护单位的青睐。此种养护方式可以通过预防性养护避免高速公路路面出现严重损坏,可以有效延长公路路面的使用寿命,降低高速公路养护的时间成本及人工成本。为明确高速公路养护中微表处技术的应用成效,该文结合某高速公路养护实例,从前期准备、施工操作、质量控制3个方面阐述高速公路养护中微表处技术的具体用法,并对养护施工后的路面进行验收检测,分析高速公路养护中微表处养护技术的应用效益,旨在为其他高速公路养护处理中有效应用微表处技术提供参考。

再生沥青混合料试验研究

为提高国省干线公路沥青路面的养护效率并促进环境可持续性发展,文中主要针对就地热再生技术在沥青路面维修中的应用进行研究。结果表明,经过1000次循环加载后,混合料的平均车辙深度仅为12 mm。水稳定试验中混合料的破坏强度平均达到了2.5 MPa。在低温弯曲试验中,混合料展现出良好的韧性和抗裂性能,其中,断裂时的平均弯曲应力为3.4 MPa,平均弯曲应变为490με,其在低温条件下具有较强的耐裂性。

沥青路面微表处养护施工技术探析

微表处技术是道路沥青路面养护施工过程中比较常用的方法之一。文中以某高速公路为例,通过水性环氧树脂进行乳化沥青的改性,制备微表处材料并展开施工,同时研究该材料的力学性能、流变性能及稳定性能,为道路沥青路面的养护工作提供更加高效、环保、可持续的解决方案。

公路沥青路面常见病害及养护技术措施

沥青路面是公路工程中常用的一种路面类型,其能够显著提升行车舒适度。但是沥青路面在长期使用之后,容易出现不同类型的质量病害,从而直接影响公路行车安全。首先分析沥青路面常见病害及形成原因,然后结合公路工程项目实例,对沥青路面状况进行调研,确定沥青路面病害类型,同时提出具有针对性的养护处治技术措施,以期能够有效改善沥青路面质量,为类似项目养护提供借鉴。

沥青路面公路养护中预防技术的应用策略研究

本文以南京市某公路为具体工程案例,针对案例中沥青路面损伤与养护的需求,开展了基于指数法的公路损伤检测、路面指数检测模型应用、路面检测结果及损伤情况检测。在对其近年来路面检测结果及健康情况进行分析后,应用实施了沥青路面的养护预防技术,并对修复养护后的效果进行了评价。

绿色养护技术在公路沥青路面中的应用探讨

公路沥青路面长期使用极易引发裂缝、车辙等病害,影响出行安全,不利于公路正常使用。文章研究了绿色养护技术在公路沥青路面中的应用,并对常见裂缝、车辙、坑槽公路病害进行分析,了解绿色养护技术内涵,从预防性养护技术、再生技术、节能型养护设备、环保材料应用四个方面,对公路沥青路面中的应用措施进行研究,有利于转变传统沥青路面养护模式,提升公路工程运行安全。同时也能够综合运用多种环保、节能养护资源,控制养护成本投入,提高公路交通事业整体利益。

沥青路面稀浆封层养护技术应用研究

为探究不同集料类型对稀浆封层养护技术应用效果的影响,论文选用玄武岩和石灰岩两种集料进行稀浆封层设计,制备稀浆封层试样,进行稀浆封层黏聚性试验、湿轮磨耗试验、轮辙试验和抗滑性试验。结果表明,采用石灰岩集料制备的稀浆封层黏聚性和水稳定性均优于玄武岩稀浆封层;级配相同的条件下,稀浆封层的抗滑性与集料类型关系较弱;建议在经常遭受水损害地区选择石灰岩集料稀浆封层,在重载交通地区选择玄武岩稀浆封层。

高速公路路面预防性养护冷补施工技术

结合实际工程,详细阐述了冷补沥青混合料的工程特性,相较于热拌沥青混合料,冷补施工技术具备环保、高效、质量优异、抗干扰能力强等优点;重点研究了冷补沥青混合料配合比设计及施工技术要点,并结合试验路段进行冷补施工质量检测。

基于OWA算子的RAP料铣刨回收工艺优化

由于国内针对铣刨技术研究起步较晚,缺乏相关的技术经验,因此在以往的旧沥青路面铣刨过程中,铣刨工艺参数的设置往往根据施工经验确定,主观因素较强,影响RAP料质量。为解决因为铣刨工艺不当,而造成RAP料质量差的问题,本文采用OWA算子,综合考虑细化度与假骨料率两个指标,研究了不同混合料的最优铣刨速度,优化了不同沥青混合料的铣刨工艺参数。结果表明:①AK-13的最优铣刨速度为15m/min;②AK-16的最优铣刨速度为12m/min;③AC-20的最优铣刨速度为7m/min。

基于沥青路面现场热再生技术的高速公路沥青路面养护

本文以某地区的高速公路为例,研究热再生技术对于高速公路沥青路面养护的应用情况和效果。选择集料和AK-13改性沥青后,依据调和粘度完成沥青混合料的制备,并确定现场热再生技术施工设备;选择复拌法完成高速公路的现场热再生技术施工。试验结果显示:现场热再生技术具有良好的沥青路面施工效果,可快速恢复病害路段路面摩擦,有效完成裂缝、车辙等病害的处理。