基于DMT的软黏土不排水抗剪强度研究

Study on undrained shear strength of soft clay based on DMT

统计国内外基于扁铲侧胀试验(The Flate Dilatometer Test,简称DMT)计算土体不排水抗剪强度的经验计算公式,并与所勘测地区实测值进行比较,根据分析结果提出了一种修正方法。结果表明,土壤性质差异造成具有代表性的经验计算公式计算结果偏大,不适用于计算所勘测地区的软土不排水抗剪强度。考虑土壤差异等因素,对之前的经验计算公式进行修正,修正后的公式计算结果与实测结果相似,说明此公式适用于评价所勘测地区的软土不排水抗剪强度。

This study summarizes the empirical formulae used at home and abroad to calculate the undrained shear strength of soils on The Flate Dilatometer Test(DMT), and compare the measured values in the surveyed area of this study, a correction method is proposed based on the analysis results. The research results can provide none of the representative empirical formulas due to differences in soil properties are applicable to calculate the undrained shear strength of soft soils in the areas surveyed, the calculation result is large. The previous empirical calculation formula was amended, and factors such as soil differences were taken into account, the corrected formula calculation results are similar to the actual measurement results, it is stated that this formula is applicable to evaluate the undrained shear strength of soft clay in the area surveyed in this study.