考虑含水条件的渠基土冻胀特性试验研究  

Experimental study on frost heave characteristics of channel soil considering water content

作　　者：王淼 郭妍秀 苏安双 孟上九[4] 张爱民 海明威 WANG Miao;GUO Yanxiu;SU Anshuang;MENG Shangjiu;ZHANG Aimin;HAI Mingwei(Heilongjiang Institute of Water Resources Research,Harbin 150080,China;College of Civil Engineering and Architecture,Harbin University of Science and Technology,Harbin 150086,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150006,China;College of Architecture and Civil Engineering,Heilongjiang University of Science and Technology,Harbin 150020,China;The Second Construction Co.,Ltd.of China Construction First Group,Beijing 102600,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Hydraulic Research Institute,Nanjing 210098,China)

机构地区：[1]黑龙江省水利科学研究院,黑龙江哈尔滨150080 [2]哈尔滨理工大学建筑工程学院,黑龙江哈尔滨150086 [3]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150006 [4]黑龙江科技大学建筑工程学院,黑龙江哈尔滨150020 [5]中建一局集团第二建筑有限公司,北京102600 [6]南京水利科学研究院水文水资源与水利工程科学国家重点实验室,江苏南京210098

出　　处：《自然灾害学报》2023年第3期74-84,共11页Journal of Natural Disasters

基　　金：中国博士后科学基金项目(2021M690946);黑龙江省博士后科学基金项目(LBH-Z20094);黑龙江省自然科学基金项目(LH2021E111);国家自然科学基金项目(U20A20318);水利部重大科技项目(SKS-2022095);水文水资源与水利工程科学国家重点实验室开放研究基金项目(U2020nkms07)。

摘　　要：水是促使土体发生冻胀破坏的关键因素,而渠道作为农业灌溉主要的输水载体,受季冻区环境威胁极易发生冻胀破坏。为了系统地研究水分对渠基土冻胀特性的影响,选取松干渠道典型土为研究对象,考虑不同的补水方式,探讨了不同含水率对渠基土冻胀特性的影响,给出了温度场、水分场和冻胀量的变化规律,对比分析两种补水方式的冻胀差异性,构建了关于含水率与补水方式的冻胀预测方程。结果表明:无论何种补水方式,冻胀量与初始含水率均成正比;同等条件下,开放系统的冻胀变形较封闭系统更明显,二者之间的比值为2~22,比值随着含水率的增大逐渐减小。研究成果可为渠基土冻胀防治提供参考。Water is the critical factor to promote the occurrence of frost heaving,but as the main agricultural irrigation of water carrier,channel is easy to be destroyed by frost heaving threatened by the environment of seasonally frozen soil region.To study the influence of water on the frost heaving characteristics of channel foundation earth layer systematacially,this paper chooses the typical soil of Songgan channel as the object,considering the influence of replenishment methods,probing into the effect of different water content on characteristics of channel foundation earth layer so as to conclude the change rule of temperature field,moisture field,and frost-heave capacity.Comparing and analyzing the difference of frost heaving between the two replenishment methods,and then established the prediction equation of frost heaving about water content and replenishment methods.The results show that the frost heaving is in proportion to the initial water content under different replenishment methods.The frost heaving deformation of open system is more obvious than that of closed system under the same condition.The ratio of frost heaving deformation between open system and closed system ranges from 2 to 22 and the ratio decreases with the increase of water content.The results of this paper could provide a reference for the prevention of frost heaving disaster.

关 键 词：季节性冻土区 渠基土冻胀 含水率 补水方式 冻胀特性 

分 类 号：TU411.3[建筑科学—岩土工程]