In order to supplement the method of using standard penetration tests to predict the physical and mechanical parameters of soil in the Loess Plateau area of Xi'an City,taking the loess plateau foundation soil in Chang'an District,Xi'an City as an example,through on-site standard penetration tests and indoor geotechnical tests,the one-dimensional and multivariate correlation analysis was conducted on the standard penetration test blow count N of the foundation soil and its physical and mechanical parameters,and the fitting relationship formula and correlation coefficient were provided.Further analysis was conducted on the research results from the perspective of loess microstructure using electron microscopy scanning and PCAS image processing technology.The results show that the moisture content,dry density,void ratio,liquid limit,cohesion,internal friction angle,and compression coefficient of the loess plateau foundation soil have a good linear correlation with the number of standard penetration tests N,and the linear correlation between the collapsibility coefficient of the foundation soil and the number of standard penetration tests N is good.The N value can be used to predict the physical and mechanical parameters of the foundation soil.The research results can provide reference for geotechnical investigation in Xi'an loess plateau area.
关键词
西安黄土塬/土的物理力学参数/标准贯入/相关性/微观结构
Key words
Xi'an loess tableland/physical and mechanical parameters of soil/standard penetration test(SPT)/correlation/micro-structure
维普
万方数据