摘要
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。
According to the characteristics of the new and existing soft clay subgrade settlement, with sample boring and in-situ test as well as physical and mechanical test of the new and existing subgrade, the compressibility coefficient and pre-consolidation pressure were obtained, which can be used to estimate soil compressibility and calculate subgrade settlement. Based on Casagrande method, with e-lgp polynomial fitting curve, the fitting mathematical model is confirmed after analytic comparison. The pre-consolidation pressure is numerically calculated by Matlab software, for inverting the new and existing subgrade undisturbed soil consolidation current situation.
出处
《地下空间与工程学报》
CSCD
北大核心
2012年第A01期1403-1406,共4页
Chinese Journal of Underground Space and Engineering
关键词
新旧路基
软粘土
固结压缩
数值分析
先期固结压力
the new and existing subgrade
soft clay
consolidated compression
numerical analysis
pre- consolidation pressure
