干旱区生态环境知识资源中心(Arid): 盐渍土水-热场耦合效应与盐胀变形试验

Arid

	盐渍土水-热场耦合效应与盐胀变形试验
其他题名	Experiment on coupling effect of water and thermal field and salt-expansion deformation of salty soil
	张沛然; 黄雪峰; 杨校辉; 刘自龙; 朱中华
来源期刊	岩土力学
ISSN	1000-7598
出版年	2018
卷号	39 期号:5 页码:1619-1624
中文摘要	为了研究西北干旱地区盐渍土在自然气候条件下的水-热场变化特征与盐胀变形规律,在4.5 m深试验坑内埋设了若干套竖向变形观测设备、含水率和温度传感器,对坑内不同深度土层的温度场、水分场和盐胀变形随季节性变化状况进行了为期1 a的动态监测和分析研究.结果表明:0.6 m以上土层相较于其他土层对气候温度变化的响应更加积极、温差变化幅值也更大,且土层间的温差幅值随降温期的不断深入而增大;土体含水率变化主要受降水、蒸发和温度梯度的耦合影响, 0.4 m以上土层水分的变化幅度较其他土层而言更为显著,土层水分迁移沿深度方向表现出分带现象;盐胀变形主要受温度和水分迁移的影响,盐胀变形主要发生在距地表1.0 m土层深度内,主要发展时间在当年11月至次年2月之间.
英文摘要	In order to study the changeable characteristics of the hydrothermal field and the salt-expansion deformation laws of salty soil under natural climatic conditions in the northwest arid area of China, vertical apparatuses for monitoring deformation, and sensors for monitoring moisture content and temperature were buried in a test pit of 4.5 meters deep. With the seasonal changes, the different depths of soil temperature field, moisture and salt-expansion deformation of the pit were dynamically monitored for a year and analyzed. The results show that the response to climate change of soil layer within 0.6 meter from the ground is more positive than other soil layers, and the change of temperature is greater. The difference of temperature among the soil layers increases with the proceeding of cooling period. The moisture content of soil is mainly influenced by precipitation, evaporation and temperature gradient; the change of soil moisture above 0.4 meter is more significant than other soil layers, and the water migration along the altitude of the soil shows a zonal phenomenon. Salt-expansion is mainly affected by the temperature and the moisture transfer of soil layers; salt-expansion deformation mainly occurs in the depth of 1.0 meter soil layer from the surface of the earth, which mainly develops in the period from November to February next year.
中文关键词	盐渍土 ; 温度场 ; 水分迁移 ; 盐胀 ; 变形特性
英文关键词	salty soil temperature field moisture migration salt-expansion characteristics of deformation
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Construction & Building Technology
WOS研究方向	Construction & Building Technology
CSCD记录号	CSCD:6249821
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238546
作者单位	张沛然, 兰州理工大学土木工程学院, 兰州, 甘肃 730050, 中国.; 杨校辉, 兰州理工大学土木工程学院, 兰州, 甘肃 730050, 中国.; 刘自龙, 兰州理工大学土木工程学院, 兰州, 甘肃 730050, 中国.; 朱中华, 兰州理工大学土木工程学院, 兰州, 甘肃 730050, 中国.; 黄雪峰, 兰州理工大学土木工程学院;;陆军勤务学院军事设施系, ;;, 兰州;;, 甘肃;;重庆 730050;;401311, 中国.
推荐引用方式 GB/T 7714	张沛然,黄雪峰,杨校辉,等. 盐渍土水-热场耦合效应与盐胀变形试验[J],2018,39(5):1619-1624.
APA	张沛然,黄雪峰,杨校辉,刘自龙,&朱中华.(2018).盐渍土水-热场耦合效应与盐胀变形试验.岩土力学,39(5),1619-1624.
MLA	张沛然,et al."盐渍土水-热场耦合效应与盐胀变形试验".岩土力学 39.5(2018):1619-1624.