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针对新旧软粘土路基固结压缩沉降变形的特点,通过对试验路段新旧路地基进行钻探取样和原位试验及室内物理力学试验,通过土体固结压缩试验求取土体的压缩系数和先期固结压力,用以判断土的压缩性和计算路基沉降。基于卡萨格兰德法,用多项式拟合e-lgp曲线,分析比较后确定曲线的拟合数学模型,然后根据先期固结压力的数值分析,应用Matlab软件实现其数值求解,反演新旧路基软粘土路基原状土固结现状。
Aiming at the characteristics of compression and settlement of the new and old soft clay subgrade consolidation, by means of drilling sampling, in-situ test and physical and mechanical test in the old and new road, the compressibility and pre-solidification of soil were calculated by soil consolidation compression test Knot pressure, used to determine the compressibility of soil and calculate the subgrade settlement. Based on the Casagrande method, polynomials fit the e-lgp curve, analyze and compare the fitted mathematical model of the curve, and then use Matlab software to solve the numerical value of the pre-consolidation pressure and invert the old and new roadbed Consolidation of undisturbed soil with soft clay subgrade.