高面膜堆石坝受力变形特性及结构设计研究  

Stress and Deformation Characteristics and Structure Design of High Membrane Faced Rockfill Dam

作　　者：付振国[1] 沈长松[2] FU Zhenguo SHEN Changsong(Co11 ege of Water Conservancy and Hydropower,Hohai University,Nanjing 210098,China Department of Hydraulic Engineering,Wentian College,Hohai University,Maanshan 243031,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]河海大学文天学院水利工程系,安徽马鞍山243031

出　　处：《人民黄河》2017年第6期110-114,129,共6页Yellow River

摘　　要：高堆石坝的一个显著特点是坝体结构变形较大。为了研究土工膜在坝体结构大变形条件下的受力变形特性,结合国外某土工膜防渗高堆石坝,采用有限元通用软件ABAQUS建立三维模型,对其进行仿真数值模拟,研究了坝体在竣工期及正常蓄水期的受力变形特点,对正常蓄水期土工膜不同锚固方式下的应力及应变进行了分析。结果表明:坝体水平位移及沉降位移符合一般规律;与普通式锚固相比,采用包裹式锚固可有效改善土工膜的受力状态。针对高堆石坝结构变形较大的特点,将上游坝坡设计为拱向上游的"凸面",凸出的矢高与水压力作用引起的变形量"相近",从而改善土工膜的受力变形特性。A significant feature of high rockfill daim is that the deformation of the daim structure is larger. For the study of stress and deforma-tion characteristics of membrane under the condition of large deformation, using finite element software ABAQUS to establish the three dimen-sional model of a high foreign membrane faced rockfill dam,the deformation of the dam during the completion stage and normal impounding period was analyzed,and the stress characteristics of the membrane in different anchoring ways during normal impounding period was also studied. The results show that the horizontal displacement and settlement displacement of the dam are in line with the general rules. What5 s more, wrapped anchorage can effectively improve the stress state of the membrane compared with the ordinary type of anchorage. Considering the large deformation characteristics of high rockfill dam,the upstream slope is designed as a “ convex” to the upstream,and the protruding vector height of which is “ similar” to deformation caused by water pressure,so as to improve the force deformation characteristics of the membrane.

关 键 词：土工膜 高堆石坝 受力变形 结构设计 

分 类 号：TV311[水利工程—水工结构工程]