宽敞河谷混凝土拱坝方案优选分析

本文以某拱坝枢纽为例论述了宽敞河谷混凝土单曲拱坝与双曲拱坝各方案运用考虑扭转作用的多拱梁法进行数值分析的结果。表明坝址河谷宽高比L/H大于3接近4的宽敞河谷可不建重力拱坝,而建较薄的双曲拱坝。由于其坝体应力分布合理、安全储备高、节省投资和材料,因而具有实用意义。

Optimization Analysis of Concrete Arch Dam Scheme in Wide Canyon

A result of numerical calculation of varions schemes of monocurved or double curved concrete arch dam in wide canyon is presented. in this paper, which is obtained by using the mult igroup arch-cantililever method, and under consideration of twisting action, with some arch dam taken as an example . It shows that a thiner double curved arch dam may be erected instead of a gravity arch dam in broad canyon with a width-height-ratio from 3 to 4 . This is of practical significance because of its reasonable stress distribution inside the dam, high safety, less cost and less materials.