温州吹填土的沉降特性研究

Study on Sedimentation Characteristics of Hydraulic-dredged Mud in Wenzhou

为了研究温州吹填土的沉降特性,针对温州丁山垦区的吹填土进行了沉降柱试验。首先研究了吹填淤泥的物理力学指标,然后进行了不同土水比、不同直径和材质的沉降柱实验,测定了沉降量和孔隙比。实验结果表明,温州吹填土沉降为大变形,曲线可分为三段:自重落淤阶段、自重固结阶段和平衡阶段;水土比影响总沉降和最终孔隙比的变化,并拟合出了曲线公式,呈对数关系;沉降柱试验槽的侧壁材质的不同对实验结果有显著影响,材质越光滑对沉积越有利。

To study the sdimentation characteristics of the hydraulic-dredged mud in Wenzhou,the settlement column experiments on the hydraulic-dredged mud in Dingshan reclamation area of Wenzhou are carried out in this paper.Firstly,the physical and mechanical indicators of hydraulic-dredged mud are studied,then the column settlement experiments of different proportions of water and soil,different diameters and materials are carried out to study the sedimentation characteristics of the hydraulic-dredged mud and determine the settlement and void ratio.The results show that the sedimentation of the hydraulic-dredged mud in Wenzhou is of large deformation,and its curve could be divided into three stages： self-weighting sdimentation stage,self-weighting consolidation stage and balance stage;The different proportion of water and soil would affect the total sedimentation and final void ratio,and the curve formula showing logarithmic relationship is fitted out.The different material of the experimental tank would have the remarkable impact to the result,the smoother the material,the better is the sedimentation.