It has become a common understanding that frost action is a kind of weathering process, which considerably changes engineering properties of soils due to cryogenical actions.
冻融过程中土结构受冷生作用的影响，可导致土的工程性质发生变化。
Cracks in unsaturated expansive soils influence the engineering properties of soils. The purpose of this paper is to research the tensile crack propagation depth of unsaturated expansive soils.
膨胀土的裂隙性是膨胀土区别于其他土类的重要特征之一，裂隙的存在严重影响着膨胀土体的工程特性。
Based on special engineering properties of expansion soils, influence factors of swell-shrink distortion are analyzed.
针对膨胀土特殊工程性质，分析了胀缩变形量的影响因素。
It therefore was concluded that the addition of fibre and lime mixture could be considered as an efficient improvement method for engineering properties of filled soils.
因此，纤维和石灰的混合掺入可以为填筑土工程性质的改良提供一个更加有效的方法。
Requirements for the filters to protect fly ash slurry are higher than those in compacted soils; The engineering properties of fly ash are getting better with time because of the pozzolanic action.
由于凝硬作用的影响，粉煤灰的工程性质可能随时间增长而改善，浸水可能不致于使灰的性能恶化；
The geographic distribution of regional soils such as loess soil, laterite soil andexpansive soil in China and their special engineering properties are briefly described in this paper.
文章论述了我国地区性土（黄土、红土和胀缩土）的地理分布和工程地质特性，分析了各类地区性土的物质成分和微结构特征以及它们的区域性变化规律。
It was shown that the improvement of engineering properties of lime soils was mainly attributed to the development of tension in fibre.
研究表明，纤维的强抗拉性是导致石灰土工程性质改变的主要因素。
It was shown that the improvement of engineering properties of lime soils was mainly attributed to the development of tension in fibre.
研究表明，纤维的强抗拉性是导致石灰土工程性质改变的主要因素。
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