堤坝蚁穴系统的水力-岩土模型及稳定性

堤(坝)身蚁穴系统由蚁路及其周边白蚁活动范围内的土体构成,因土栖白蚁的生物化学作用,其表现出与围护土层完全不同的性质.将有关条件适当简化后,整个蚊道可简化为一个具有两弯折头的自由出流短管系统的水力-岩土计算模型.当洪水水位涨至蚁穴系统之上时,可按泄水短管计算;当洪水水位退至蚁穴系统最高点之下时,可按虹吸管系统计算.通过对蚁穴系统的水力变化特征、岩土工程特性及其相互间共同作用的分析与计算,可较准确地预测堤身的破坏点位置.同时,根据其破坏特征,提出了相应的处理措施.

Hydraulic-geotechnical model and stability of ant-nest system in dam

The ant-nest system is consist of ant-way and ambient soil mass,and for the biochemical reaction of the white-ant inhabited in soil, its properties are completely different from that of ambient soil. The whole ant-way can be simplified to hydraulic-geotechnical calculating model for free-drain short-pipe system with two bending-heads. The calculation can be conducted according to sluice short pipe when flood level is over the ant-nest system,and otherwise,according to siphon short-pipe. The distructive position of the dam body can be predicted correctly by (analysis) and calculation of hydraulic variation features, geotechnical engineering characters and interaction between the two. Finally, corresponding prevention and control countermeasures are put forward.