膨胀土灌溉渠堤的损坏以历史事实阐明在修建灌溉建筑物时进行地质勘测的重要性。分析的工程位于波兰干旱地区的河流冲积平原，沉积物深达２５ｍ，最上一层由沙性粘土、沙和细沙组成，厚约５～１０ｍ。土壤中沙的含量最高达４５％～８０％，粘土含量５％～６％。土壤试验结... Damage to expansive soil irrigation canals illustrates the importance of geological surveys in the construction of irrigation structures based on historical facts. The project analyzed is located in a river alluvial plain in arid regions of Poland. The sediment reaches a depth of 25 m. The uppermost layer consists of sandy clay, sand and fine sand with a thickness of about 5 to 10 m. Sand soil content of up to 45% to 80%, clay content of 5% to 6%. Soil Test Results ...