（1 黑龙江省三江建设管理局，哈尔滨 150081；2 流域水循环模拟与调控国家重点实验室中国水利水电科学研究院，北京 100038；3 河南省交通规划设计研究院股份有限公司，郑州 450052）

［摘要］为了研究膨胀土的胀缩特性对引水渠工程的影响，对取自黑龙江省北部某渠道工程沿线10个钻孔中20个不同深度的膨胀土土样进行了膨胀率及收缩特性试验研究。结果表明，土样的膨胀率、体缩率随着取样深度的增加基本呈减小的趋势；对击实膨胀土，其含水率愈大，膨胀量愈小；膨胀率与干密度呈正相关关系；含水率对膨胀率的影响比干密度对膨胀率的影响相对较明显。

［关键词］膨胀土； 膨胀率； 含水率； 干密度

中图分类号：TU472文献标识码：A文章编号：1002-848X(2018)04-0100-03

Experimental study on swell-shrink performance of expansive soil of a diversion canal project in northern part of Heilongjiang Province

Zhang Fengde1, Bian Jinghong2, Wang Yuanming1, Chen Bing3

(1 Sanjiang Engineering Construction Management Bureau of Heilongjiang Province, Harbin 150081，China; 2 State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resourcesand Hydropower Research, Beijing 100038, China; 3 Henan Provincial Communications Planning & Design Institute Co., Ltd., Zhengzhou 450052, China)

Abstract:In order to study the influence of swell-shrink performance of expansive soil on diversion canal project, laboratory test study was conducted on the expansion rate and shrinkage characteristics of specimens of expansive soil in 10 holes with 20 different depths along a diversion canal project in the northern part of Heilongjiang Province. The results show that the expansion rate and volume shrinkage ratio of soil specimens decreases with the increase of sampling depth. When expansive soil has been compacted, the larger the moisture content is, the smaller the expansion rate is. The expansion rate is positively correlated with dry density. Effect of moisture content on the expansion rate is relatively obvious that effect of the dry density on the expansion rate.

Keywords:expansive soil; expansion rate; moisture content; dry density

*黑龙江省松干治理工程科研项目（SGZL/KY-09），黑龙江省胖头泡蓄滞洪区建设工程科学研究项目（PTP/KY-02）。

作者简介：张凤德，硕士，高级工程师，Email:zhangfengde626@126.com。