Ohenhen L O, Shirzaei M
Department of Geosciences Virginia Tech Blacksburg VA USA.
Earths Future. 2022 Dec;10(12):e2022EF003219. doi: 10.1029/2022EF003219. Epub 2022 Dec 16.
Every year incidents of building collapse claim many lives and cause enormous financial losses around the world, which are often blamed on low-quality materials, non-compliance with standards, lack of oversight, and failure to enforce building codes. Here, we highlight the role of land subsidence in triggering unprecedented collapses in the city of Lagos, Nigeria, which has reported over 200 casualties during 152 building failures since 2005. We used acquisitions from radar satellites for 2018-2021 and provided data that link subsidence to foundation damage and high building failure risk in the region. We estimate that an area of 5-81 km and 255-4,000 buildings are exposed to a high to very high risk of collapse for short-term (10 years) to long-term (75 years) periods. Differential land subsidence can trigger building collapse, and the data presented here will enable authorities to create adequate building codes and standards and devise mitigation strategies.
每年，世界各地都有建筑物倒塌事件发生，造成许多人死亡并带来巨大的经济损失，这些往往归咎于低质量材料、不遵守标准、缺乏监管以及建筑法规执行不力。在此，我们强调地面沉降在引发尼日利亚拉各斯市前所未有的建筑物倒塌事件中所起的作用，自2005年以来，该市152起建筑物倒塌事件已造成200多人伤亡。我们利用2018年至2021年雷达卫星获取的数据，提供了将沉降与该地区地基损坏及建筑物高倒塌风险相关联的数据。我们估计，在短期（10年）到长期（75年）期间，面积为5 - 81平方公里的区域以及255 - 4000栋建筑物面临着高至极高的倒塌风险。地面不均匀沉降会引发建筑物倒塌，本文所呈现的数据将使当局能够制定适当的建筑法规和标准，并制定缓解策略。
