摘要
为探明季节性冻土区模袋混凝土衬砌渠道冻胀特征,提出模袋混凝土渠道防冻胀技术,在内蒙古河套灌区模袋混凝土渠道开展了聚苯乙烯板防冻胀试验研究。通过原型渠道冻胀试验得出:在8 cm模袋混凝土基础上分别增加4 cm和7 cm模袋混凝土后,阴坡下部1/3处最大冻胀量削减率分别为17.32%和39.55%,阳坡下部1/3处最大冻胀量削减率分别为17.23%和41.23%;在8 cm模袋混凝土基础上分别铺设4 cm和12 cm聚苯乙烯板后,阴坡、阳坡下部1/3处最大冻胀量削减率分别为51.7%、89.5%和48.7%、90.5%。8 cm模袋混凝土条件下铺设12 cm聚苯乙烯板处理和15 cm模袋混凝土条件下铺设6 cm聚苯乙烯板处理均无残余变形,其他处理均出现不同程度的残余变形(0.2~1.8 cm)。渠道边坡下部1/3处的冻胀量最大,渠坡上部1/3处的冻胀量最小。
In order to find out the frost heaving characteristics of bagged concrete canal in seasonal frozen soil area and put forward the anti⁃frost heaving technology of bagged concrete canal,the experiment of preventing frost heaving of putting polystyrene board was carried out in Hetao irrigation area of Inner Mongolia.According to the frost heaving test of prototype canal,after adding 4 cm and 7 cm to the 8 cm bagged concrete,the reduction rates of the maximum frost heaving amount at the bottom 1/3 of the shady slope are 17.32%and 39.55%respective⁃ly,the reduction rates of the maximum frost heaving amount at the bottom 1/3 of the sunny slope are 17.23%and 41.23%respectively.After laying 4 cm and 12 cm polystyrene board on the base of 8 cm bagged concrete,the reduction rates of the maximum frost heaving amount at 1/3 of shade slope and sunny slope are 51.7%,89.5%and 48.7%,90.5%respectively.The residual deformation of 0.2-1.8 cm is found in the other treatment,but the treatments of laying 12 cm polystyrene under 8cm bagged concrete and laying 6 cm polystyrene under 15 cm bagged concrete which have no residual deformities.The maximum frost heave amount is located at the lower 1/3 canal slope and the mini⁃mum frost heave amount is located at the upper 1/3 canal slope.
作者
孙杰
郭彦芬
程满金
霍轶珍
王俊
SUN Jie;GUO Yanfen;CHENG Manjin;HUO Yizhen;WANG Jun(Hetao College,Bayannur 015000,China;Irrigation and Drainage Engineering Research Center of Hetao Irrigation Area in Inner Mongolia Autonomous Region,Bayannur 015000,China;Inner Mongolia Water Conservancy Science Research Institute,Hohhot 010060,China)
出处
《人民黄河》
CAS
北大核心
2021年第7期160-164,共5页
Yellow River
基金
内蒙古自治区教育厅科技项目(NJZY17386,NJZY16332)
内蒙古自治区水利厅科技项目(NSK2017-N3)
巴彦淖尔市科技局资助项目(2017K54)。
关键词
渠道
模袋混凝土
冻胀变形
聚苯乙烯板
防冻胀技术
季节性冻土区
河套灌区
canal
bagged concrete
frost heave deformation
polystyrene board
anti⁃frost heaving technology
seasonal frozen soil area
Hetao irrigation area
