板缝结构对U形衬砌渠道冻胀响应的原位监测  

Monitoring of the Effect of Slab Structure on Frost Heaving of U-Shaped Concrete Lining Channel

作　　者：潘鑫[1] 王红雨[1] 唐少容[1] PAN Xin;WANG Hongyu;TANG Shaorong(College of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China)

机构地区：[1]宁夏大学土木与水利工程学院,宁夏银川750021

出　　处：《人民黄河》2019年第4期153-158,共6页Yellow River

基　　金：国家自然科学基金资助项目(51269023)

摘　　要：为探索季冻区防渗衬砌渠道混凝土板缝对冻胀变形的影响,选取宁夏引黄灌区青铜峡市沙湖村高标准农田建设项目区混凝土衬砌渠道作为试验点,在同一条渠道相近渠段上对传统多拼式U形混凝土衬砌渠道的板缝结构和经过加固处理消除板缝影响的无板缝结构进行原位监测试验,并分析处理一个完整冻融周期内两种结构的冻胀量、法向冻胀力的监测数据。结果表明:在土壤温度和土壤含水率相近情况下,消除板缝影响的无板缝U形混凝土衬砌结构冻胀量均小于传统多拼式U形混凝土衬砌结构的,且前者的法向冻胀力分布更均匀。In order to explore the influence of concrete slabs to the frost heave deformation of concrete lining channel in seasonal frozen area, we selected the concrete lining channel in high standard farmland construction project area of Shahu Village in Qingtongxia City in Ningxia Yellow River irrigation area as a test point. In-situ monitoring test were carried out on the slab structure of traditional multi arc-plates U-shaped concrete lining channel and the slab-free structure which had been affected by the reinforcement. Finally, the frost heaving volume and the frost heaving force of the two structures in a complete freezing and thawing cycle was analyzed. The results show that in the similar circumstance of soil temperature and soil moisture content, the frost heaving volume of the U-shaped concrete lining with slab-free structure is less than that of the traditional multi arc-plates U-shaped concrete lining. And the lining with slab-free structure has a more uniform distribution of frost heaving force.

关 键 词：U形衬砌渠道 板缝结构 冻胀力 冻胀量 

分 类 号：TV698.1[水利工程—水利水电工程]