摘要
以在建的阿不都拉面板堆石坝工程为例,采用薄层接触单元来模拟其板间缝、周边缝、面板与垫层接触面建立三维仿真模型,研究蓄水期该坝板间缝和周边缝的变形发展规律,研究结果表明:阿不都拉面板坝满蓄期板间缝剪切错动变形最大值为0.73 mm,位于两岸基岩变坡点附近,张拉变形最大值为2.49 mm,位于河谷两岸附近,压缩变形最大值为-4.09 mm,沉陷错动变形最大值为4.76 mm,均位于河床中央附近;周边缝剪切错动变形最大值为4.00 mm,靠近基岩变坡点,张拉变形最大值为12.00 mm,沉陷错动变形最大值为-32.00 mm,均位于右岸52号周边缝上端;其缝张压、剪切变形值与相近坝高面板坝相比均处在同一毫米数量级,沉陷变形数值小于同类坝型工程。研究成果以期指导类似坝体板间缝和周边缝的设计。
Taking the Abdullah face-slab rock-fill dam project in construction as an example,a three-dimensional simulation model is established by simulating the inter-slab joint,peripheral joint,and interface between the slab and the cushion with a thin layer interface element,to study the deformation laws of the inter-slab joint and peripheral joint.The results show that.①The maximum shear displacement&deformation of the Abdullah face-slab dam during the full storage period is 0.73 mm,which appears near the grade change point of the bedrock at two sides.The maximum tensile deformation is 2.49 mm,which occurs near both sides of the valley.The maximum compression deformation is-4.09 mm and the maximum subsidence displacement&deformation is 4.76 mm,both of which appear near the center of the river bed.②The maximum shear displacement&deformation of the peripheral joint is 4.00 mm,which occurs near the grade change point of the bedrock.The maximum tensile deformation is 12.00 mm and the maximum subsidence displacement&deformation is-32.00 mm,both of which appear in the upper part of the 52# peripheral joint on the right bank.③The tensile and shear deformation are in the same millimeter scale as those of similar high face-slab dams,and the subsidence deformation is smaller than that of similar dams.Moreover,the research results are expected to provide reference for the design of inter-slab joints and peripheral joints in the similar dams.
作者
郭丹萍
李言亮
杨涛
张巍
俞伟
GUO Danping;LI Yanliang;YANG Tao;ZHANG Wei;YU Wei(Huaian Water Resources Survey,Design&Research Institute Co.,Ltd.,Huaian 223001,China)
出处
《人民珠江》
2019年第12期130-135,共6页
Pearl River
关键词
面板堆石坝
薄层单元
板间缝
周边缝
缝三向变形
face-slab rockfill dam
thin layer element
inter-slab joint
peripheral joint
three-dimensional joint deformation
