Soil collapse is a major geotechnical problem that causes architectural and structural damage to buildings and engineering infrastructure. Losses due to soil collapsibility have an economical aspect and the study of these soils is very important due to the large occurrence of collapsible soils around the world. In this research, conventional oedometer tests and suction-controlled oedometer tests were conducted to study the benefit of compaction as a method of improving the behavior of a lateritic soil that is particularly susceptible to collapse after soaking. The results offer practical information to minimize problems arising from collapsible soils. The soil water content before the sample is inundated affected the soil collapsible behavior. Soil specimens less dense when compacted at the dry side of the compaction curve exhibited volume variation under loading less than 4% and collapse deformations up to about 11% when exposed to flooding, while soil specimens compacted at optimum moisture content showed volume variation under loading around 10% and a maximum collapse deformation by about 6%. The collapse deformations changed significantly with inundation stress for the soil compacted especially for stresses above 100 kPa. The collapse deformations were almost insignificant when the lateritic soil had a relative compaction of 90% with values almost always less than or equal to 2%, proving that the compaction process is a soil improvement technique that can significantly reduce the collapse induced by inundation.

中文翻译：

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压实条件下红土土的湿陷行为

土壤塌陷是一个主要的岩土工程问题，会导致建筑物和工程基础设施的建筑和结构损坏。由于土壤湿陷性造成的损失具有经济意义，并且由于全球可湿陷性土壤的大量出现，对这些土壤的研究非常重要。在这项研究中，进行了传统固结仪测试和吸力控制固结仪测试，以研究压实作为一种改善浸泡后特别容易坍塌的红土土壤行为的方法的好处。结果提供了实用信息，以最大限度地减少可塌陷土壤引起的问题。样品淹没前土壤含水量影响土壤湿陷行为。在压实曲线的干燥侧压实时密度较小的土壤样品在加载时表现出小于 4% 的体积变化，当暴露于洪水时坍塌变形高达约 11%，而在最佳含水量下压实的土壤样品在大约周围加载时表现出体积变化10%，最大坍塌变形约 6%。压实土的坍塌变形随淹没应力发生显着变化，特别是对于100 kPa以上的应力。当红土土相对压实度为90%时，坍塌变形几乎不显着，数值几乎总是小于或等于2%，证明压实过程是一种土壤改良技术，可以显着减少洪水引起的坍塌。