玉龙喀什水利枢纽工程超高面板堆石坝变形控制设计

Deformation Control Design of Ultra-high Face Rockfill Dam of Yulong Kashi Water Conservancy Project

玉龙大坝为强震区“Ⅴ”型河谷窄深河槽内超高面板堆石坝,坝体变形控制是决定大坝运行安全的核心,为保证坝体各区域之间的变形协调,避免混凝土面板因挠度过大导致的结构性裂缝、脱空、止水与垂直缝挤压破坏等问题出现。工程在初步设计阶段根据坝址地形地质条件及同类超高面板坝实践经验,从筑坝材料室内及现场试验、三维静动力分析、大坝变形控制原则和措施等方面进行了系统设计,大坝变形与协调基本可控。施工图阶段需结合现场大型试验成果,继续开展大坝三维动静力研究,为计算和施工提供更可靠的参数依据和控制标准,确保大坝安全。

Yulong Dam is a super-high face rockfill dam in narrow and deep channel of Ⅴ-type Valley in strong earthquake area. Deformation control of dam body is the core to determine the safety of dam operation. The purpose of this paper is to ensure the deformation coordination between different areas of the dam body and avoid problems such as structural cracks, voids, water stop and compression failure of vertical joints caused by excessive deflection of concrete slab. In the preliminary design stage, according to the topographic and geological conditions of the dam site and the practical experience of similar super-high panel dams, the project carries out system design from aspects of indoor and field tests of dam materials, three-dimensional static and dynamic analysis, principles and measures for dam deformation control, and the dam deformation and coordination are basically controllable.During the construction drawing stage, three-dimensional dynamic and static research of the dam should be carried out in conjunction with large-scale field test results to provide more reliable parameter basis and control standards for calculation and construction and ensure dam safety.