Towards resilient roads to storm-surge flooding: case study of Bangladesh
Towards resilient roads to storm-surge flooding: case study of Bangladesh
复制标题
打造应对风暴潮洪水的弹性道路：孟加拉国案例研究
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
L. Amador
中科院分区：
文献类型：
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作者：
Md. Shohel Reza Amin;U. Tamima;L. Amador
摘要在灾区紧急救援行动中，工作道路至关重要。长时间的路面浸水会加速路面的快速老化，并增加维修成本。建议将脆弱的路面升级为隆起的路基和石笼墙，以提高飓风后紧急关注期间至关重要的战略道路的弹性。因此，最佳的路面管理可以用来分配升级和维护和恢复（M&R）业务，以减少损害，减轻地质物理风险和社区脆弱性，甚至在灾害发生之前。一个案例研究的区域公路，在孟加拉国的Barguna区，经常受到飓风和风暴潮的影响的干线和集电道路。通过综合地球物理风险、社区、结构和基础设施脆弱性以及损害指数，估算了每个路段的地球物理风险和脆弱性指数。动态线性规划用于优化M&R策略以及将战略道路转化为弹性永久人行道。优化道路状况所需的相同预算也用于指导道路转换为永久性路面，从而提高整体网络的弹性。正如预期的那样，结果表明，大部分年度预算同样用于改建或重铺路面。本文提出的决策方法对世界各地的道路机构非常有用，因为它为他们提供了在任何洪水灾害发生前提高其战略网络弹性的能力。
Abstract Operating roads are critical during emergency operations at a disaster area. Prolonged inundation of pavements accelerates rapid deterioration of pavements and increases maintenance cost. The upgrade of vulnerable pavements with a raised subgrade and gabion walls is proposed as the means to increase the resiliency of strategic roads vital during the emergency attention in the aftermath of a cyclone. Hence, optimal pavement management can be used to allocate upgrade and maintenance and rehabilitation (M&R) operations to reduce the damage and mitigate the geo-physical risk and community vulnerability before the disaster even occurs. A case study is presented for regional highways, arterial and collector roads of Barguna district in Bangladesh that is frequently affected by cyclones and storm surges. The geo-physical risk and vulnerability (GEOPHRIV) index of each road segments is estimated by integrating the geo-physical risk; community, structure and infrastructure vulnerabilities; and damage indices. Dynamic linear programming is applied to optimise M&R strategies and the conversion of strategic roads into resilient perpetual pavements. The same budget required to optimise roads condition is also used to guide the conversion of roads into perpetual pavements, therefore increasing the overall network resiliency. As expected, the results show that most of the annual budget is equally expended into the conversion or the resurfacing of pavements. The decision-making approach herein proposed is very useful to roads agencies around the world, because it provides them with the ability to increase the resiliency of their strategic network ex-ante any flooding disaster.