Scholarlink

<p>The City of Porto Alegre (Brazil) is located along Rio Guaiba Lake, which receives water from the main rivers in the state of Rio Grande do Sul. In May 1941, after several days with above-average rainfall, the level of lake Rio Guaíba rose the flood level (above 1.76&#xa0;m). The event caused flooding in several area. Due to the event, a protection system consisting of around 68&#xa0;km of levees was designed and built in the 1970s. In May 2024, after 83 years, a new climatic event with large rainfall volumes caused a new record high level of 5.35&#xa0;m. Unfortunately, due to several problems (leaks in the floodgate sealing system, failure of the pump sealing valves, disconnection of the electricity supplying the pumps and flooding of the pump houses, overflow, and rupture of internal levees at points below the level of 5.35&#xa0;m, among others) the water managed to pass through the protection system. As a result, there was new flooding in the city, causing several losses and damages, including the closure of the international airport for almost six months. To contribute to the restructuring of the protection system, this work aims to study the stabilization of one of the internal levees. To this end, a geotechnical study was prepared, with the interpretation of field tests to characterize the foundation subsoil, laboratory tests of the levee construction material, and analysis of stability and percolation using Limit Equilibrium Method – LEM. From the study, it was found that the levee is stable and safe, being one of the few internal levees without rupture.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Stability Analysis of a Protective Levee in the City of Porto Alegre (Brazil) after Record Flood

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月11日

查看全文
  • Cesar Alberto Ruver

摘要

The City of Porto Alegre (Brazil) is located along Rio Guaiba Lake, which receives water from the main rivers in the state of Rio Grande do Sul. In May 1941, after several days with above-average rainfall, the level of lake Rio Guaíba rose the flood level (above 1.76 m). The event caused flooding in several area. Due to the event, a protection system consisting of around 68 km of levees was designed and built in the 1970s. In May 2024, after 83 years, a new climatic event with large rainfall volumes caused a new record high level of 5.35 m. Unfortunately, due to several problems (leaks in the floodgate sealing system, failure of the pump sealing valves, disconnection of the electricity supplying the pumps and flooding of the pump houses, overflow, and rupture of internal levees at points below the level of 5.35 m, among others) the water managed to pass through the protection system. As a result, there was new flooding in the city, causing several losses and damages, including the closure of the international airport for almost six months. To contribute to the restructuring of the protection system, this work aims to study the stabilization of one of the internal levees. To this end, a geotechnical study was prepared, with the interpretation of field tests to characterize the foundation subsoil, laboratory tests of the levee construction material, and analysis of stability and percolation using Limit Equilibrium Method – LEM. From the study, it was found that the levee is stable and safe, being one of the few internal levees without rupture.