白鹤梁水下保护工程导墙结构分析

Structural analysis for guide wall of White Crane Ridge Inscription underwater in-situ protection work

白鹤梁水下保护工程的关键性结构是水下椭圆形直立钢筋混凝土导墙和上覆的钢筋混凝土壳体。为给壳体设计提供可靠的受力参数,采用三维有限元模型,按施工过程中及运行期9种荷载组合工况对导墙结构进行了分析计算。结果表明:按现有设计尺寸,墙体可以承受外围水压力的作用;参观廊道安装后,墙体仍有很大的安全储备;若遇突发洪水,增加2 m高的临时围堰后,可以保证墙体安全。

The vertical elliptic reinforced concrete guide wall and the overlay reinforced concrete shell are the key structures of White Crane Ridge Inscription underwater in-situ protection works. In combination with 9 load cases in construction and operation periods, 3D FEM was adopted to carry out structural analysis for the structure, so as to provide reliable loading parameters. The results show that the wall structure could bear the outside water pressure by the given size, and with much safety margin even after the visiting corridor was assembled. Under the condition of flood, the wall structure could be guaranteed by supplementing a 2m high temporal cofferdam.