CAJ | 학술논문

高含沙河流汛期常常发生大水大沙的高含沙洪水，由于高含沙洪水的性质不同干一般挟沙水流，在涨洪过程中常常出现强烈的河槽冲刷。在这样的河流上，管道设计埋深是保障穿越工程安全的重要参数之一，它与河流的冲刷深度有关。在长输管道的穿跨越设计规范中，对河道的冲刷计算是沿用60年代初期铁道部门研究提出的"64-1"公式。从工程角度出发，根据高含沙水流特点，对高含沙洪水冲刷的计算方法进行了分析推导，并对几种常用计算方法进行了理论分析比较和实例资料检验。分析表明，"64－1"公式不适用于高含沙水流条件。提出的以张瑞谨起动流速公式为基础的冲刷计算方法，与实例资料吻合较好。
고함사하류신기상상발생대수대사적고함사홍수，유우고함사홍수적성질불동간일반협사수류，재창홍과정중상상출현강렬적하조충쇄。재저양적하류상，관도설계매심시보장천월공정안전적중요삼수지일，타여하류적충쇄심도유관。재장수관도적천과월설계규범중，대하도적충쇄계산시연용60년대초기철도부문연구제출적"64-1"공식。종공정각도출발，근거고함사수류특점，대고함사홍수충쇄적계산방법진행료분석추도，병대궤충상용계산방법진행료이론분석비교화실례자료검험。분석표명，"64－1"공식불괄용우고함사수류조건。제출적이장서근기동류속공식위기출적충쇄계산방법，여실례자료문합교호。
A full-loaded river frequently produces in wet season high peak discharge flow that carries a quite large amount of sediments. Such flow often causes very strong erosion on the river bottom during flood rising,since its behavior is different from ordinary silt carrying flow. Great probability of the erosion arising leads design buried depth to become one of important design parameters for long distance pipeline works to cut through the river in safety. However,the calculation about the scouring has still followed the design standard-"64-1" formula which was established in 1960's for the common circumstance of erosion. This paper,taking the distinguishing feature of hyperconcentration flood into account,deduced approach to computing probable maximum eroded depth and studied the existing common calculations (including "64-1" formula) both in theoretical and practical cases as well. The conclusions drawn from the study are that "64-1" formula does not apply to the case of hyperconcentration flood and the Zhang Ruijing's initial velocity based approach which was proposed in this paper can fit the practical case well.