沉积泥沙自重固结系数测试方法研究

发布时间：2018-04-30 04:06

本文选题：沉降试验 + 沉积泥沙　；参考：《岩土工程学报》2017年S1期

【摘要】：Terzaghi理论中的固结系数为定值,应用于沉积泥沙大变形固结计算时存在较大误差,而沉积泥沙固结系数的试验测定仍存在一定困难。沉降柱试验能完整的模拟低浓度泥沙的沉积固结过程,准确获取泥沙沉降过程曲线和沉积层体积分数分布曲线。在此基础上,基于不同阶段泥沙沉降过程控制方程,通过作图方法得到沉降控制方程的拟合参数,得到了随固结过程连续变化的沉积泥沙自重固结系数。根据固结过程中的沉积泥沙渗透系数和体积压缩系数变化规律,同样得到四种不同的固结系数求解方法,并讨论了各影响因素对沉积泥沙自重固结系数的影响趋势。
[Abstract]:The consolidation coefficient in Terzaghi theory is a definite value. There is a big error in the calculation of the consolidation coefficient of sediment in large deformation, but it is still difficult to measure the consolidation coefficient of sediment. The sedimentation column test can completely simulate the sedimentation consolidation process of low concentration sediment and obtain the sedimentation process curve and sediment volume fraction distribution curve accurately. On this basis, based on the governing equation of sediment settlement process in different stages, the fitting parameters of the sedimentation control equation are obtained by drawing method, and the self-gravity consolidation coefficient of sediment is obtained, which varies continuously with the consolidation process. According to the variation law of sediment permeability coefficient and volume compression coefficient in consolidation process, four different methods of solving consolidation coefficient are also obtained, and the influence trend of each influencing factor on sediment self-weight consolidation coefficient is discussed.
【作者单位】：铁道第三勘察设计院集团有限公司;城市轨道交通数字化建设与测评技术国家工程实验室;河海大学岩土工程科学研究所;
【分类号】：TU411

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