新疆某灌区U型渠水平冻胀力变化试验研究  

Experimental study on the variation of horizontal frozen expansion force of U-channel in an irrigation area of Xinjiang

作　　者：张红良 ZHANG Hong-liang(Hetian Dingsheng Engineering Testing Co.,Ltd.,Hetian 848000,China)

机构地区：[1]和田鼎晟工程试验检测有限公司

出　　处：《水科学与工程技术》2019年第6期37-40,共4页Water Sciences and Engineering Technology

摘　　要：针对新疆某灌区多年冻土区渠道易发生冻胀破坏的问题,采用温度及应力传感器,设计实验研究了2017年10月~2018年5月,U型渠在不同埋深及土壤含水量下渠道冻胀力的变化特点。结果表明:U型渠的水平冻胀力变化与温度的变化相一致,随温度的降低其水平冻胀力逐渐增加,最大冻胀力出现在2月15日即温度最低的月份;纵断面上其冻胀力表现出先增加后减小的趋势,最大冻胀力出现在U型槽1/2~1/3位置处;在不同土壤埋深下,其冻胀力最大值随着埋深的增加逐渐向下移动,而不同含水量下,其冻胀力最大值出现的深度基本不变,位于渠道中部。In a certain irrigation area of Xinjiang,the problem that the channels in permafrost area are prone to frost heave and damage,and the variation of freezing force of the U-channel under different buried depths and soil moisture content from October 2017 to May 2018 was studied by means of temperature and stress sensors.The results show that the variation of the horizontal cold expansion force of U-channel is consistent with the change of temperature,and the horizontal cold expansion force increases gradually with the decrease of temperature.The maximum cold expansion force in this paper appears on February 15,which is the month with the lowest temperature.The frozen expansion force on the longitudinal section shows a tendency to increase first and then decrease,and the maximum frozen expansion force appears at the position of 1/2~1/3 of the U-shaped groove;Under different soil depth,the maximum frozen expansion force gradually moves downward with the increase of buried depth,and under different water content,the maximum depth of frozen expansion force appears basically unchanged,located in the middle of the channel.

关 键 词：互助县灌区 水平冻胀力 埋深 土壤含水量 

分 类 号：TU528[建筑科学—建筑技术科学]