基于水毁体积比的抛石丁坝安全性判别分析

Discriminatory analysis of rockfill groin's safety based on water-destruction volumetric ratio

针对在航道整治工程中对整治建筑物的安全性没有具体的定量化判别方法,在总结前人研究的基础上,通过抛石丁坝清水冲刷试验,提出一种以坝体水毁体积比来快速判别丁坝安全性的方法.由于丁坝结构复杂,影响坝体水毁的不确定因素众多,因此采用量纲分析法建立抛石丁坝水毁体积比计算公式.该式将抛石丁坝水毁体积与其影响因素直接联系起来,能够定量反映水毁因素与水毁程度之间的关系,从回归方程的计算结果来看,计算值和试验数据吻合较好,可为实际工程设计和维护提供参考依据.

Considering there is no quantitative safety discrimination of regulation structure at present, we present a fast and efficient discriminant method for rockfill groin＇s safety based on the water-destruction volumetric ratio by the movable bed model test of clear water scouring with different operating conditions. However, this task is difficult because of the complex structure of rockfill groin and too many uncertain factors. Therefore, we adopt dimensional analytical method to study the formula for water-destruction volumetric ratio of rockfill groin. This formula connects the water-destruction volume of rockfill groin with its affecting factors directly; and it can reflect the relationship between the water-destruction＇s factors and degree quantitatively. The calculated results fitted the experiment data well, which could supply reference to the project design and maintenance.