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水泥混凝土路面的病害有断裂类病害、竖向位移类病害、接缝类病害、表层类病害等,对于行车速度、安全及舒适性具有重要影响。本文分析了水泥混凝土路面的上述四大类病害,对各类病害的类型及轻重程度分级进行了详细讨论,并探讨了水泥混凝土路面病害的处治对策。 相似文献
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水泥混凝土路面具有刚度大、承载力强、耐久性能好、可就地取材、建设使用经济等诸多优点.本文分析了水泥混凝土路面的四大类病害(断裂类病害、竖向位移类病害、接缝类病害、表层类病害)之一的断裂类病害——水泥板混凝土板裂缝,它是一种极易发生的病害,可以造成板块断裂,地表水下渗使路面基层承载力降低,进而引起错板、唧泥和混凝土面板破碎.这些后果都严重地影响着水泥混凝土路面的使用性能和使用寿命,对于行车速度、安全及舒适性具有重要影响,增加了行车的不安全因素.水泥混凝土路面断裂后,修复工作难度大、养生期长和影响交通,且维修费用高.因此,防止水泥混凝土路面裂缝出现有着重要意义. 相似文献
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文章详细分析了水泥混凝土路面病害的类型及产生的原因,并在此基础上总结了水泥混凝土路面病害的防治对策。 相似文献
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伴随着我国经济的快速发展,交通事业也日益推进,水泥混凝土路面的修筑量逐年增加,有关水泥混凝土路面的病害问题也随之而来,诸如裂缝、断板以及沉陷等,这些问题无形之中影响了水泥混凝土路面的质量与寿命。文章结合笔者实践经验,探讨了水泥混凝路面的基本特征以及其病害问题的防治。 相似文献
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随着现代公路建设施工技术的开发,采用水泥混凝土材料进行铺筑公路路面,成为当前公路道桥工程施工的重要手段和方式。由于自然环境及施工技术等客观因素制约,水泥混凝土路面结构在使用过程中往往会出现一些病害。探究水泥混凝土路面断板病害的成因及预防措施,有利于提高水泥混凝土路面性能。 相似文献
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随着水泥混凝土路面修筑技术的日臻完善,水泥混凝土路面发展的速度较快,在技术、经济上也将显示出明显的优势。然而水泥路面的迅速增长,水泥路面的许多病害也逐渐体现出来。文章通过多年来的工作经验,总结了水泥路面不同病害的成因,并提出了相应的措施,与同行共同探讨。 相似文献
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社会管理和公共服务是现代城市的两大基本职能.保障城市公共安全,实施防灾减灾是城市履行管理与服务职能的重要内容.首先,综述国际城市防灾减灾的合作和研究的主要进展;其次,基于城市生态经济系统特征,探讨城市灾害系统的结构功能和形成机制,分析中国城市灾害风险的特征;再次,提出中国城市防灾减灾体系的建设战略,包括:确立城市安全发... 相似文献
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自然灾害应急物流管理体系是为了在发生突发自然灾害的情况下,有组织地进行物资人员等的投入调配的一个综合体系。文中阐述了构建自然灾害应急物流管理体系的必要性,分析了自然灾害应急物流管理体系构建过程中存在的问题,提出了构建完善的自然灾害应急物流管理体系的具体措施。 相似文献
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As the frequency and intensity of disasters throughout the world increase, so do the demands for humanitarian relief and the need for effective disaster‐based leadership training. Numerous organizations are poised to act in response to disasters that necessitate a significant amount of leadership and logistics support. Although there are many entities often involved in disaster relief, the symposium outlines the emerging role higher education can play in improving response outcomes, not only by providing “boots on the ground” but also by developing skilled disaster relief leaders in both curricular and cocurricular venues. Institutions of higher education provide experiential learning opportunities offering critical service for immediate disaster relief while developing the skills of future leaders. During these experiences, students develop disaster‐based leadership and logistics acumen. Similarly, programmatic assessment is critical in measuring student leadership growth during the experiential learning process of providing disaster relief. The education and assessment of these trainings provides an important dimension of disaster leadership as it examines the leaders in action and fosters a commitment to adequately prepare them to lead in a time of disaster. A qualitative approach is recommended for assessing experiential leadership learning to better inform teaching and to cultivate future disaster leadership that meets ongoing global needs. 相似文献
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Recent empirical literature has found a negative relationship between income per capita and measures of risk from natural disaster, supportive of logic that higher incomes allow countries to mitigate disaster risk. We argue that behavioral changes at the micro level in response to increasing income (such as location choice and extent of costly abatement activity) may lead to a non-linear relationship between aggregate incomes and disaster damages, where the risks increase with income before they decrease. In a country-year panel data set, we show that disaster risk associated with flooding, landslides and windstorms increases with income up to GDP per capita levels of $5044, $3360, and $4688 per year respectively and decrease thereafter. Such non-linear impacts are absent for other disaster types such as extreme temperature events and earthquakes where the links between human behavioral choices and exposure to risk are not as strong. From a policy perspective, this suggests that for the least developed countries, the dual goals of disaster risk prevention and economic development cannot be assumed to be complementary for all forms of natural disaster. In addition to allocating resources to manage disaster risk, the poorest nations may have to be more proactive in enacting policies that alter the behavioral choices of citizens that impact a country's exposure to natural disaster risk. 相似文献
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本篇文章探讨韩国灾难管理体系并分析体系内存在的问题,探索未来的灾难体系发展方向。并希望灾难频发的中国政府也能够借鉴韩国灾难管理体系,探索制定灾难政策的发展方向。 相似文献
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