您的位置:首页  > 论文页面

冻融干湿作用下硫酸盐渍土的崩解特性研究

发表时间:2017-10-31  浏览量:1104  下载量:143
全部作者: 姜璐莎,霍振升,吕擎峰,王沪生
作者单位: 兰州大学土木工程与力学学院;安徽省交通规划设计研究总院股份有限公司
摘 要: 针对硫酸盐渍土在不同作用下的崩解特性,通过大量室内试验,采用浮筒法对试样进行崩解试验,设置重塑、干后、干湿后、冻后、冻融后、干湿-冻融后、冻融-干湿后7组,以盐渍土样的崩解量及崩解速率来表征其崩解特性。试验结果表明,盐渍土的含水率及密实度是影响其崩解速率的两个较为明显的因素,而含水率的影响更为显著,盐渍土的崩解曲线不呈典型的“S”曲线,干湿作用对盐渍土崩解的抑制效果强于冻融作用,干湿和冻融作用的先后关系也会导致不同的结果,而且干湿冻融综合作用时会相互抵消,不同作用后的盐渍土内部不均匀,导致崩解速率上下波动。
关 键 词: 土木建筑工程施工;冻融干湿作用;硫酸盐渍土;崩解试验
Title: Disintegration characteristics of sulphate salty soil in freezing-thawing and drying-wetting
Author: JIANG Lusha, HUO Zhensheng, LÜ Qingfeng, WANG Husheng
Organization: School of Civil Engineering and Mechanics, Lanzhou University; Anhui Transport Consulting & Design Institute Co., Ltd.
Abstract: In order to understand the disintegration characteristics of sulphate salty soil under different conditions, the samples were subjected to disintegration test by pontoon based on a lot of tests. We set up seven different groups, which were remodeled soil, drying, drying-wetting, freezing, freezing-thawing, drying-wetting & freezing-thawing and freezing-thawing & drying-wetting. The disintegration characteristics were characterized by the amount and rate of disintegration. The experiment results show that the water content and the compactness of the saline soil are the most obvious factors that affect the rate of disintegration. But the impact of water content is more significant. The disintegration curve of saline soil does not show a typical “S” and the effect of drying-wetting on the disintegration of saline soil is stronger than freezing-thawing. The different sequences of drying-wetting and freezing-thawing will also lead to different results. And the effects will cancel each other out when drying-wetting and freezing-thawing interact on the soil samples at the same time. It can result in the uneven internal soil, and the rate of disintegration fluctuates up and down.
Key words: civil and architectural engineering construction; freezing-thawing and drying-wetting; sulphate salty soil; disintegration test
发表期数: 2017年10月第20期
引用格式: 姜璐莎,霍振升,吕擎峰,等. 冻融干湿作用下硫酸盐渍土的崩解特性研究[J]. 中国科技论文在线精品论文,2017,10(20):2293-2300.
 
0 评论数 0
暂无评论
友情链接