山区河流散抛石坝水毁原因分析  

Stability Analysis of Enrockment Dams in Mountain Streams

作　　者：张玮[1] 瞿凌锋[1] 徐金环[1] 

机构地区：[1]河海大学交通与海洋工程学院,江苏南京210098

出　　处：《水运工程》2003年第4期10-12,共3页Port & Waterway Engineering

基　　金：交通部西部交通建设科技项目(2001-318-224-68)。

摘　　要：山区河流坡降大、流速急、分布不均,散抛石坝水毁严重。根据块石粒径与起动流速的关系,指出块石稳定重量与起动流速的高次方程成正比,流速增长50%可能导致块石稳定重量接近40倍的变化。因此,在山区河流等一些流速较大的地区,仅仅试图通过增加单个块石的重量来提高坝体稳定性的作法,效果甚微,还需要采取其它措施。Enrockment dams are often destroyed due to rapid flow velocity in mountain streams. According to the relationship between grain size of block and incipient velocity, the block weight is found to be in direction proportion with 6th～9th power of incipient velocity, and 50% increase of the velocity will result in about 40 times change of block weight. Therefore, it is not appropriate to improve the stability of enrockment dam by simply increasing the block weight. Other measures shall also be taken.

关 键 词：散抛石坝 水毁原因 稳定重量 起动流速 航道整治 整治建筑物 坝体稳定性 

分 类 号：U617.9[交通运输工程—船舶及航道工程]