采用瑞典圆弧法和毕肖普法评价超高沥青心墙坝的稳定性

Evaluating the Stability of Ultra-high Asphalt Core Wall Dams using Sweden Circle Method and Bishop Method

鉴于狭窄河谷地区百米级高沥青混凝土心墙坝所面临的变形控制难、防渗体易破坏等诸多设计难点,结合工程特点提出适合心墙坝体结构、坝壳料设计方案。采用中国水科院自编程序STAB2009瑞典圆弧法、毕肖普简化法对工程大坝边坡稳定进行计算,结果表明:坝体在各个工况下2种方法计算出的结果基本相当,且坝坡最小安全系数均有一定安全储备。说明大坝结构设计合理,为150 m级沥青心墙坝工程设计提供思路。

The hundred-meter high asphalt concrete core wall dam in narrow river valley areas faces many design difficulties such as difficult deformation control and easy damage to the anti-seepage body.This article proposes a design scheme suitable for the core wall dam structure and dam shell material based on engineering characteristics.The stability of engineering dam slopes was calculated using Sweden Circle Method and Bishop simplified method using the self developed program STAB2009 by the Chinese Academy of Water Sciences.The results show that the results calculated by the two methods for the dam body are basically equivalent under various working conditions,and the minimum safety factor of the dam slope has a certain safety reserve.It indicates that the dam structure design is reasonable and provides ideas for the design of 150 m level asphalt core wall dams.