The effect of rainfall on cementatory characteristics of laterite in slope

摘要

Through indoor artificial rainfall test on the model slope of the laterite, the soil tests on samples of different parts of the model slope of laterite were carried out in the end of rainfall. According to the test results, the changes of the water content, the grain composition and the shear strength of the laterite in the model slope were analysed. The results showed that the effect of rainfall caused the water content of the laterite in the model slope to increase, and the altitude of the model slope was lower, the water content of the laterite in the model slope was higher. The effect of rainfall led to the density of the laterite in the model slope to decrease gradually when the altitude of the model slope was lower gradually. The grain composition exhibited that the silt content was increased and the clay content was reduced with the decrease of the model slope altitude. Based on analysing the variation of the water content, density and grain composition in the laterite of the model slope under the effect of rainfall, the changes of the shear strength of the laterite in the model slope were studied, further the changes of the cementatory characteristics of the laterite in the model slope were analysed under the effect of rainfall.