Effect of particle gradation on collapse characteristics of compacted gravel sand chloride saline soil
In order to explore the influence of particle size distribution on the collapse characteristics of gravel sand chloride saline soil,indoor collapsibility tests were carried out for compacted sand(gravel sand,coarse sand,medium sand)and gravel saline soil.Based on the test data,the analysis model of collapse rate and various influencing factors was constructed by SPSS software,and the sensitive parameters and weights of collapsibility of gravel sand chlorine saline soil were clarified.The results show that the collapsibility rate of gravel sand saline soil increases first and then decreases with the increase of fine particle content and 2-5 mm particle content.The collapsibility rate of coarse sand and medium sand saline soil decreases with the increase of fine particle content,and increases with the increase of 2-5 mm particle content.The collapsibility rate of gravel saline soil increases with the increase of fine particle content,and increases first and then decreases with the increase of salt content.For gravel sand,the influence weights of fine particle content and 2-5 mm particle content on its collapsibility rate are 0.864 and 0.126 respectively.For coarse sand,the influence weights of fine particle content and 2-5 mm particle content on its collapsibility rate are 0.257 and 0.722 respectively.For medium sand,the influence weights of fine particle content and 2-5 mm particle content on its collapsibility rate are 0.573 and 0.411 respectively.For gravel saline soil,the influence weights of salt content,fine particle content and 2-5 mm particle content on its collapsibility rate are 0.681,0.234 and 0.049 respectively.
万方数据
维普
