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以京沪高铁深厚地层细粒土固结试验数据为基础,以e-lgp曲线包含分式函数的复合函数表达和土体液限与压缩指数的线性关系为依据,提出了基于土体基本物性指标标准压缩模量E1?2和液限wL推求正常固结原状地基土全压力段压缩模量的简化方法,其适用性得到了京津城际铁路试验数据的验证。结果表明,Harris函数能较好地描述土体压缩的e-lgp曲线特征,E1?2和wL能分别反映曲线低压力段割线斜率和高压力点切线斜率,建立的地基土压缩模量估算方法具有良好精度,其中,100~1 000 k Pa常压力段的误差均值仅为7.89%,高压力段约为13.70%,只在低压力段变异性较大;研究成果提供了缺少e-lgp曲线情况下简便快速获取土体压缩模量的新途径。
Based on the experimental data of fine-grained soil consolidation in the deep formation of Beijing-Shanghai high-speed railway, based on the linear relationship between the composite function expression containing fractional function of e-lgp curve and the liquid limit and compressibility index of soil, Standard Compression Modulus E1? 2 and Liquid Limit wL are used to deduce a simplified method for compressive modulus of normal pressure soil in the full pressure section, and its applicability has been verified by the test data of Beijing-Tianjin intercity railway. The results show that the Harris function can well describe the e-lgp curve characteristics of soil compression. E1? 2 and wL can respectively reflect the slope of the secant of low pressure section and the slope of tangent of high pressure point. The estimated compressive modulus of foundation soil The method has good accuracy. Among them, the average error of atmospheric pressure at 100-1000 kPa is only 7.89%, and the high pressure is about 13.70%, and the variability is only high at low pressure. The research results provide a theoretical basis for e-lgp A New Way to Get Compressible Modulus of Soil Compactly and Quickly Under Curve.