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首页> 外文期刊>Natural hazards and earth system sciences >Causes and consequences of the sinkhole at El Trebol of Quito, Ecuador - implications for economic damage and risk assessment
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Causes and consequences of the sinkhole at El Trebol of Quito, Ecuador - implications for economic damage and risk assessment

机译：厄瓜多尔基多El Trebol污水坑的原因和后果-对经济损失和风险评估的影响

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摘要

The so-called El Trebol is a critical road interchange in Quito connecting the north and south regions of the city. In addition, it connects Quito with the highly populated Los Chillos Valley, one of the most traveled zones in the Ecuadorian capital. El Trebol was constructed in the late 1960s in order to resolve the traffic jams of the capital city and for that purpose the Machangara River was rerouted through an underground concrete box tunnel. In March 2008, the tunnel contained a high amount of discarded furniture that had been impacting the top portion of the tunnel, compromising the structural integrity. On 31 March 2008 after a heavy rainfall a sinkhole of great proportions formed in the Trebol traffic hub. In the first few minutes, the sinkhole reached an initial diameter of 30 m. The collapse continued to grow in the following days until the final dimensions of 120m in diameter and some 40m of depth, revealing the Machangara River at the base of the sinkhole.
机译：所谓的El Trebol是基多市至关重要的道路交汇处，连接城市的北部和南部地区。此外，它还使基多与人口稠密的洛斯奇洛斯山谷（Los Chillos Valley）相连，洛斯奇洛斯山谷是厄瓜多尔首都最受欢迎的地区之一。 El Trebol建于1960年代后期，目的是解决首都的交通拥堵问题，为此，Machangara河经过一条地下混凝土箱形隧道进行了改道。 2008年3月，该隧道包含大量废弃家具，这些家具已经影响到隧道顶部，从而破坏了结构完整性。在暴雨过后的2008年3月31日，Trebol交通枢纽形成了很大比例的下陷。在最初的几分钟内，下沉孔的初始直径为30 m。在接下来的几天里，塌陷继续增长，直到最终直径为120m，深度约40m，才揭示出位于坑底的Machangara河。

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