【摘要】 常规的水工导流洞堵头设计中一般都忽略堵头变形产生的摩擦阻力,使得堵头长度过分偏于保守。根据堵头的工作机理,首次推导了堵头的变形压力,以及由此增加的阻滑力的表达式,并结合紫坪铺工程实例,分析了该因素对堵头整体稳定性的影响。计算结果表明,堵头的变形压力可以有效地提高堵头的抗滑稳定安全系数和减少堵头的设计长度,从而缩短工期,节约投资,具有良好的工程应用价值。更多还原

【Abstract】 The favorable influence of friction resistance,caused by the deformation of the concrete plug,is generally ignored in the design of plug for diversion tunnel,which makes the length of the plug over-conservative. In accordance with the working mechanism of plug,the formula of resistance is deduced. Then a real project case is taken to verify that the safety factor can be improved and the design length of plug can be decreased considering the resistance under some conditions,such shortening the construction period and reducing investment.更多还原