银川市区粉细砂土的压缩模量与标贯击数关系研究

Study on the relationship between compression modulus of fine sand and standard penetration test blow count in Yinchuan city

为合理确定银川市区粉细砂土的压缩指标,依托银川市区3处工程场地进行原位取样和标贯试验,根据不同深度处压缩试验与标贯试验数据的对比分析,建立了地层深度Z、压缩模量E_s、标贯击数N三者之间的对应关系。研究结果表明,银川市区粉细砂土的压缩模量E_s与标贯击数N具有良好的线性相关性,相关系数均达0.7以上。建立压缩模量E_s与标贯击数N的线性回归方程,根据银川市区粉细砂土的标贯击数即可确定其压缩模量。该相关性的建立,可为该地区地质和岩土工程设计人员准确、便捷获取银川市区粉细砂土的压缩指标提供可靠的途径。

In order to determine the compression modulus of fine sand in Yinchuan city, In situ sampling and standard penetration test were carried out on 3 engineering sites in Yinchuan. According to the comparative analysis of compression test and standard penetration test data at different depths, the corresponding relationship among the formation depth Z, the compression modulus Es and the standard penetration number N is established. The results show that the compressive modu- lus of fine sand in Yinchuan city has a good linear relationship with the standard penetration number. The correlation coefficients were above 0.7, and the linear regression equation of N and Es was established. So the compressive modulus of the soil can be acquired by the standard penetration number of fine sand in Yinchuan city. The establishment of this correlation can provide a reliable way for geological and geotechnical engineering designers in the area to obtain the compression modulus of fine sand in Yinchuan city.