徐州地区非饱和粉土毛细特性试验研究  

Experimental Study on Capillary Water Characteristics of Unsaturated Silt in Xuzhou Area

作　　者：杨默涵 王照腾 王亮亮 罗涛 朱前龙 YANG Mohan;WANG Zhaoteng;WANG Liangliang;LUO Tao;ZHU Qianlong(Xuzhou Design Institute,China Railway Shanghai Design Institute Group Co.,Ltd.,Xuzhou 221000,Jiangsu,China;School of Mechanics and Civil Engineering,China University of Mining and Technology(CUMT),Xuzhou 221116,Jiangsu,China)

机构地区：[1]中铁上海设计院集团有限公司徐州设计院,江苏徐州221000 [2]中国矿业大学力学与土木工程学院,江苏徐州221116

出　　处：《路基工程》2023年第3期73-77,共5页Subgrade Engineering

基　　金：国家自然科学基金面上项目(52178373)。

摘　　要：以江苏新沂地区粉土为研究对象,开展两种不同初始压实系数0.89、0.92的粉土室内毛细水上升高度试验,得到毛细水上升高度与时间的关系及毛细水上升稳定后含水率与高度的关系。研究表明:粉土中毛细水在短时间内能上升到较大高度,在前0.58天(14小时)的上升高度达到总上升高度的30%,前3天上升高度可达总高度的50%~61%;粉土毛细水上升高度及达到稳定所需时间与初始压实系数呈负相关关系,最终上升高度分别为60.0、40.3 cm,达到稳定所需时间分别为17、12天;毛细水上升稳定后土样含水率在0~20 cm高度范围内随初始压实系数的增大而减小,土样最大含水率分别是初始含水率的1.92~2.30倍。Taking the silt in Xinyi area of Jiangsu Province as the research object,the ascent heights of capillary water for silt in laboratory were tested with two different initial compaction coefficients 0.89 and 0.92.The relationship between Ascent height of capillary water in silt and time,and the relationship between water content and height after capillary water rises steadily are obtained.The research shows that the capillary water in silt can rise to a large height in a short time,and the Ascent height can reach 30%of the total ascent height in the first 0.58 days(14 hours).Ascent height in the first 3 days can reach the total height 50%-61%.The ascent height of capillary water of silt and the time required for reaching stability are negatively correlated with the initial coefficient of compaction.The final ascent height are 60.0,40.3 cm,and the time required to reach stability are 17 days,12 days respectively.After the capillary water rises and becomes stable,the water content of the soil sample varies with the initial coefficient of compaction in a certain height range(0-20 cm).The maximum water content of the soil sample is 1.92-2.30 times of the initial water content.

关 键 词：毛细水 上升高度 上升速率 压实系数 粉土 

分 类 号：TU43[建筑科学—岩土工程]