乌鲁木齐市主要岩土层物理力学性质指标的相关性分析

对岩土层物理力学性质指标进行数理统计,研究其相关关系具有重要工程意义。在对乌鲁木齐城区主要岩土层土工试验数据和原位测试数据收集的基础上,运用数理统计和概率论的方法,对该地区主要岩土层物理力学性质指标进行了概率统计特征分析和相关性分析,并建立了岩土参数之间的经验公式。研究结果表明：粉土物理力学参数和泥岩单轴抗压强度基本符合正态分布；粉土液性指数和含水率、塑限和液限的相关性极强,主要呈线性相关性；卵石的重力触探击数与剪切波速存在一定相关性,但相关性较弱；泥岩剪切波速与天然单轴抗压强度存在强相关性,与饱和单轴抗压强度存在中等相关性,主要呈线性相关性。通过对乌鲁木齐城区主要岩土参数特性及其相关性的分析研究,可以为乌鲁木齐城区岩土工程勘察、设计和施工提供参考。

Study on Correlations of Physical and Mechanical Property Indexes of the Major Layer in Urumqi

It is of great engineering significance to carry out mathematical statistics on the physical and mechanical properties of rock and soil layers and to study their correlation.Based on the data collected from geotechnical tests and in-situ test data of the main geotechnical layers in Urumqi City, the probability statistics and correlation analysis of the physical and mechanical properties of the main rock layers in the area are carried out by means of mathematical statistics and probability theory, and an empirical formula between the geotechnical parameters is established. The results show that the physical and mechanical parameters of silt and the uniaxial compressive strength of mudstone basically conform to the normal distribution; the correlation between the liquid index and water content of silt, plastic limit and liquid limit is very strong, and it is mainly linear correlation; the number of gravity penetration of pebbles has a certain correlation with shear wave velocity, but the correlation is weak; There is a strong correlation between shear wave velocity and natural uniaxial compressive strength, and a moderate correlation between shear wave velocity and saturated uniaxial compressive strength. Through the analysis and study of the main geotechnical parameters and their correlation in Urumqi urban area, it can provide reference for geotechnical engineering investigation, design and construction in Urumqi urban area.