共查询到20条相似文献,搜索用时 468 毫秒
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公路路面的养护,原则上以预防为主,防治结合,采取正确的技术措施治理病害和消除隐患,提高养护质量,以确保公路在设计年限内的正常使用或延长公路的使用年限。采用路面预防性养护技术,即在路面状况尚良好、未出现明显损坏或出现轻微损坏时,就对路面实施费用效益良好的维护措施,以达到延缓路面损坏、保持或改善路面使用性能、延长路面使用寿命、节省路面寿命周期养护费用的目的。因此,为了更好的做好养护管理工作,对几年来养护管理进行了统计分析、对我市公路预养护管理经验进行了总结,对公路预养护施工常出现的问题进行解决,以期能够给以后的养护施工管理有一定促进的作用。 相似文献
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文章分析了路面使用性能的发展规律及其特点,指出了传统预测方法的不足,介绍采用指数平滑法来提高预测精度,可解决我国路面使用性能预测模型,预测精度不高的问题。 相似文献
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省道阿赛公路多福屯至赛尔龙段作为我省东南部地区一条重要的出省通道,使我省丰富的煤炭资源经甘肃南部运往四川,承受着繁重的交通压力,现有路面遭受了严重的损坏,经过交通量预测分析和对本路段近年来路面病害整治方案实施效果的总结,提出合理的路面补强方案,节省项目投资,为今后我省在类似路网改造工程中路面补强方案的选择提供参考. 相似文献
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对高速公路沥青路面进行破损状态评估直接影响其养护决策和经费预算。沥青路面在繁重的交通载荷作用下,其路用性能会逐年降低,同时还会出现一些典型的病害。当病害达到一定程度后就需要进行路面铺装,而何时铺装取决于半刚性基层路面的性能评价。基于国内外研究现状,对沥青路面的路用性能指标进行分析,重点研究了路面破损状况、路面行驶质量、路面车辙、抗滑能力、承载能力等指标,并给出了沥青路面的损坏类型和轻重程度鉴别标准,希望依据此标准可以指导路面养护工作。 相似文献
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对某城市道路沥青路面的损坏状况进行了调查及评价工作,在此基础上针对不同路段的现状,提出了裂缝修补和铣刨罩面的维修决策,并对此进行了路面修复施工。 相似文献
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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。 相似文献
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Prolongation of the service life of pavements requires efficient prediction of the performance of their structural condition and particularly the occurrence and propagation of cracking of the asphalt layer. Although pavement performance prediction has been extensively investigated in the past, models for predicting the cracking probability and for quantifying impacts of associated explanatory factors following pavement treatment, have not been adequately investigated in the past. In this paper the probability of alligator crack initiation following pavement treatments is modeled with the use of genetically optimized Neural Networks, The proposed methodological approach represents the actual (observed) relationships between of probability of crack initiation and the various design, traffic and weather factors as well as the different rehabilitation strategies. Data from the Long Term Pavement Performance (LTPP) Data Base and the Specific Pavement Study 5 (SPS-5) are used for model development. Results indicate that the proposed approach results in accurately predicting the probability of crack initiation following treatment; furthermore it provided information on the relationship between external factors and cracking probability that can help pavement managers in developing appropriate rehabilitation strategies. 相似文献
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文章针对隧道内空间、湿度、噪音及水等工作环境特点,分析隧道路面的工作性能和工作机理,提出适用于隧道内部特殊环境的橡胶粉改性水泥路面、露石水泥路面以及沥青铺装路面结构。 相似文献
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如何降低路面高温、减少城市热岛效应影响成为了近年来一个较为关注的问题。文章通过分析多孔沥青混凝土路面的热环境,提出多孔沥青混凝土路面的降温原理及方式。 相似文献
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Traditional pavement distress index such as the Pavement Condition Index (PCI) developed by U.S. Army Corps of Engineers determines coefficients of distresses based on subjective ratings. This study proposed an asphalt pavement distress condition index based on various types of distress data collected from the Long-Term Pavement Performance (LTPP) database through Structural Equation Modeling (SEM). The SEM method treated the overall distress index as a latent variable while various distresses were treated as endogenous and other influence factors such as age, layer thickness, material type, weather, environment and traffic, were exogenous observed variables. The SEM method modeled the contributions of various distresses as well as the influence of other factors on the overall pavement distress condition. Influences of age, layer thickness, material type, environment and traffic on the latent distress condition were in accordance with previous studies. Compared with previous attempts to model latent pavement condition index utilizing SEM method, more pavement condition measurements and influencing factors were included. Specifically, this study adopted the robust maximum likelihood estimator (MLR) to estimate parameters for non-normally distributed data and derived the explicit expression of latent variables with intercepts. A multiple regression prediction model was built to calculate an overall condition index utilizing those measured distress data. The established pavement distress index prediction model provided a rational estimation of weighting coefficients for each distress type. The prediction model showed that alligator cracking, longitudinal cracking in wheel path, non-wheel path longitudinal cracking, transverse cracking, block cracking, edge cracking, patch and bleeding were significant for the latent pavement distress index. 相似文献
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文章以祥周至龙邦二级公路路面大修工程为例,介绍采用旧路油面层和水泥稳定碎石基层进行再生利用的大修施工方案,从细粒式沥青混凝土上面层、沥青碎石再生料下面层(AM-16)、沥青碎石封油层、水泥稳定碎石再生基层等方面阐述了路面各结构层施工技术要求和质量控制要点。 相似文献
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文章以道路材料实验室为依托,通过中海油AH-70#基质沥青、布敦岩沥青(BRA)、SBS改性沥青混合料的对比试验,研究以干法掺入不同BRA掺量的改性沥青混合料的综合路用性能。结果表明:布敦岩沥青混合料的高温稳定性、水稳定性和低温性能明显优于基质沥青混合料;当BRA掺量为3%时,混合料各项指标均已接近或达到了SBS改性沥青沥青混合料的性能,而当掺量从3%增加到4%时,混合料的高温性能、水稳性能均有所降低,因此,工程应用中的布敦岩沥青掺量宜在3%附近。 相似文献
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文章分析了沥青公路路面出现裂缝的原因,从施工技术、养护管理、材料特征、公路排水性能及路基设计等方面提出了针对性的解决方法及预防路面产生裂缝的具体措施。 相似文献