摘要
江河堤防必须考虑河水涨落的非稳定渗流来设计最经济可靠的渗控措施,本文按照河水洪峰在堤身内引起的浸湿(润)线前锋推进图案,引导出任何洪峰过程中堤身内浸湿距离的计算公式,包括不透水和透水堤基以及有防渗措施的堤基。计算公式与河堤渗透试验和数值计算结果互相对比是一致的。对于特殊情况,正弦曲线的典型洪峰,也给出了简便的浸湿距离计算公式。同时还给出了考虑非饱和土的吸力作用的计算公式以及在洪峰过程中堤后渗水量计算公式。
The formulas for calculating the seepage front distance in levee during flood peak period are deduced based on the progressive graphic of wetting front in the levee.The formulas can be aplied to the levees with permeable foundation or impermeable foundation.The calculation result is in good agreement with eepage test data and numerical simulation.A simplified formula is proposed for the case of the flood process is in a type of sine curve.Furthermore,the formula for calculating the seepage discharge is also suggested.
出处
《水利学报》
EI
CSCD
北大核心
2002年第12期56-62,67,共8页
Journal of Hydraulic Engineering
