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半刚性基层沥青路面裂缝是不可避免的,也是沥青路面早期破坏的主要形式,如果不有效地防治,将加剧了路面破坏,本文从设计、施工方面介绍了汾灌高速公路预防沥青路面裂缝的主要措施,通过路面使用情况的调查,分析了裂缝产生的主要原因为路基不均匀沉降和路基纵向不均匀,并提出了沥青路面使用期间裂缝的维修方法。 相似文献
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《铁道标准设计通讯》2016,(2):38-43
安顺至紫云高速公路所经区域地貌以岩溶及侵蚀中低山地貌为主,尤其杨武乡至终点段地形起伏较大,地貌类型复杂多变,断层破碎带、岩溶消水洞、出水口、溶腔、暗河等较为发育,顺层边坡较多,在复杂地质区域定线时应首先察明线路廊带内地形、地质条件,研究线路各段落工程地质主要特点,抓住控制线路布设的关键因素,提出合理可行的线路方案及比选意见。论述在项目定测期间,应用综合地质选线技术使推荐的线路方案良好绕避开断层破碎带,合理地绕避岩溶消水洞、出水口及暗河等,有效减少顺层边坡,推荐的线路方案安全、经济、合理。 相似文献
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京沪高速公路纵向裂缝病害检测分析及处治技术 总被引:1,自引:0,他引:1
通过对京沪高速公路河北段路面纵向裂缝现场调查、相关养护资料调研,并配合地质钻探、探地雷达和瑞雷波等多种检测方法,对京沪高速公路河北段路面纵向裂缝产生原因、病害发展情况及现状进行分析,并在此基础上提出相应的病害处治措施。 相似文献
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本文介绍了采用雷达、变频高速摄像和智能视频触发技术,对行驶车辆,特别是高速行驶(车速120 -180km/h)车辆进行全天候24小时连续监控,对违法超速行驶车辆进行抓拍的电子抓拍系统的原理。 相似文献
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The interaction between urban transport, land cover change and the distribution of population is a typical manifestation of the urbanization process. As high-grade road, expressway plays a significant role in promoting resource circulation and economic development. Based on the road distribution, land cover and population census data, this study specifically probed the relationship between the expressways and the land cover and population of Beijing. The results show that: (1) as the distance from an expressway increases, the amount of built-up land gradually decreased, and the transfer of land cover near the expressway was more intensive and frequent when compared with that of the whole city; (2) In 2010, a district that was less than 3 km from both sides of the expressway and which occupies one-quarter of the entire city had concentrations of 42% industrial land, 58% of settlement land, and 76% transportation land of the entire city; (3) As for Beijing, the population density was positively correlated to road density, and population density declined with a corresponding increase in buffer distance; (4) The ring area between the Fifth and the Sixth Ring Road featured the greatest density of expressways and the most dramatic changes in both land cover and population. According to our study, there’s a positive interactive feedback relationship between the expressways, land cover and population of Beijing. Also, due to the concentration of population, industry and transport system around the expressways, special attention should be paid to environmental pollution and the inhabitants’ health in this area. 相似文献
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公路路线设计规范要求在当条件受限时,隧道出口至前方互通式立体交叉减速车道渐变段起点的距离不应小于1000m。在山区高速公路的立交设计中可能会难以满足要求,此时如何进行立交设计,规范无具体说明。介绍了一座在隧道出口附近的枢纽立交设计思路,供类似工程参考。 相似文献
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