黑龙江地区渠基土工程性质试验研究  

Study on Properties of Canal Soil Engineering in Heilongjiang Province

作　　者：赵佳敏 郭敏霞[1] 张爱军[1] 刘宏泰 ZHAO Jia-min;GUO Min-xia;ZHANG Ai-jun;LIU Hong-tai(College of Water Resources and Architectural Engineering,Northwest A&F University,Yangling 712100,China;Gansu Institute of Water and Hydropower Engineering Investigation Design and Research Co.,Ltd,Lanzhou 730000,China;Machinery Industry Investigation and Design Institute Co.,Ltd,Xi'an 710043,China)

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [2]甘肃省水利水电勘测设计研究院有限责任公司,甘肃兰州730000 [3]机械工业勘察设计研究院有限公司,陕西西安710043

出　　处：《水电能源科学》2021年第4期137-140,116,共5页Water Resources and Power

基　　金：国家自然科学基金项目(51978572);国家重点研发计划(2017YFC0405103);陕西省重点研发计划(2017ZDXM-SF-074)。

摘　　要：为了探究黑龙江地区引发渠道工程结构变形的原因,了解渠道所在地区渠基土的工程性质,以引嫩扩建骨干一期工程内的乌南干渠和红旗干渠基土为例,通过多种室内试验研究黑龙江地区渠道土的工程性质,并从含盐、物质组成分析了土体分散性产生的内在因素,同时针对工程实际情况提出了相应的整治措施。结果表明,工程两个灌区的渠基土均为具有分散性、膨胀性且含盐已达到盐渍土标准的特殊土;钠离子含量是土样产生分散性的主要原因,蒙脱石含量不是判断土样分散性的必要条件;土样的无荷膨胀率为4.2%~7.1%,50kPa下有荷膨胀率为2.5%~4.0%;土样的粘聚力为16.68~34.92kPa,内摩擦角为11.5°~21.1°;避免冬季施工、加强基础稳定、加固渠底固脚等整治措施可为分布有该类特殊渠基土的渠道工程建设提供参考。In order to explore the causes of structural deformation of the canal engineering in Heilongjiang Province and understand the engineering properties of the canal foundation soil in the region,taking the foundation soil of Wunan main canal and Hongqi main canal in the first phase of the expansion project of diversion from Nenjiang as the research object,the engineering properties of the canal soil in Heilongjiang area were explored through a variety of indoor tests.And the internal factors of the dispersion were analyzed from the salt and material composition.Then the corresponding treatment measures were put forward according to the actual situation of the project.The results show that the canal foundation soil in the two irrigation areas of the project was a kind of special soil with dispersibility,expansibility and salt content reaching the standard of saline soil;The content of sodium ion was the main reason for the dispersibility of soil samples,and the content of Montmorillonite was not the necessary condition for judging the dispersibility of soil samples;The no-load expansion rate of soil samples was 4.2%~7.1%,and the load expansion rate of 50 kPa was 2.5%~4.0%;The cohesion of the soil sample was 16.68~34.92 kPa,and the internal friction angle was 11.5°~21.1°.The treatment measures,such as avoiding winter construction,strengthening foundation stability,and strengthening the bottom and foot of canal,can provide reference for the construction of the canal engineering with such special canal foundation soil.

关 键 词：渠道土 分散性 膨胀性 特殊土 工程性质 

分 类 号：TU411[建筑科学—岩土工程]