坝下岩埂对混凝土防渗面板应力应变性状的影响  

Effect of Rock Ridge on Stress and Strain Properties of Concrete Impervious Panel Dam

作　　者：凤不群 马品非 

机构地区：[1]新疆兵团勘测设计院(集团)有限责任公司,新疆乌鲁木齐830000 [2]塔城地区水利水电勘测设计院,新疆塔城834700

出　　处：《水利与建筑工程学报》2016年第5期126-131,共6页Journal of Water Resources and Architectural Engineering

摘　　要：通过玛热勒苏混凝土面板堆石坝的有限元分析计算,重点研究在蓄水条件下,坝下岩埂不同的处理方案对面板应力应变性状的影响,获得了不同岩埂开挖形态条件下的应力应变计算结果。计算结果表明,受岩埂开挖形态的影响,各开挖处理方案中,混凝土面板内的压应力均能满足强度要求,若岩埂完全保留在坝体内部时,面板中的拉应力则超过混凝土的抗拉强度,导致面板被拉裂而失去防渗功能。岩埂清除范围将直接涉及到坝基开挖与坝体填筑工程量,影响到工程造价。Concrete faced rockfill dam near the slope section affected by topography,it may be located in the rock ridge,which would affect the panel stress-strain behavior,it will lead to cracks of the panel and the loss of seepage control function. Calculated by the finite element analysis of concrete faced rockfill dam of Marelesu,focus on the condition of water storage,under different rock ridge processing schemes of dam panel stress-strain behavior,the calculation results of stress and strain in different forms under the conditions of the excavation of rock ridge. The calculation results show that the rock ridge excavation form by impact,the excavation scheme and concrete panel of pressure stress can meet the strength requirements,if the rock ridge completely retained in the interior of the dam,in panel of tensile stress more than the tensile strength of the concrete,this will cause the panel to be damaged and lose the function of seepage control. The clear scope of rock ridge will be directly related to the excavation of the dam foundation and dam filling quantity,this affect the project cost. The results for the dam design put forward reasonable suggestions and effective measures for treatment of rock ridge.

关 键 词：岩埂 混凝土面板堆石坝 应力应变 

分 类 号：TV641.4[水利工程—水利水电工程]