CAJ | 학술논문

坡体地下水位上升是诱发滑坡的重要因素，实时排出地下水是防治边坡地质灾害的有效手段。虹吸排水具有免动力和流动过程由液位变化自动控制的物理特性，可满足实时排出坡体地下水的需要，但虹吸管中空气积累会导致虹吸过程中断，制约了边坡虹吸排水技术的推广应用。溶解于水的空气因虹吸管内压力降低而释出是形成气泡的物理基础。实验结果表明，虹吸进水口水面以上垂直高度3．5m以上就会出现大量气泡，经过虹吸顶点后，气泡发生强烈的兼并形成大气泡。当虹吸管的进出水口的水头差较大时，气泡间的水弹容易推动气泡从出水口排出。当虹吸管直径大于5 mm时，缓慢的虹吸流动，会发生管内气泡的积累，最终破坏虹吸过程；虹吸管的直径小于4 mm时，可以形成基本稳定的弹状流。因此，为保持边坡虹吸过程长期有效，经常性降雨并且坡体地下水丰富的地区可选用直径为5 mm的虹吸管，非经常性降雨的地区应选择小于等于4 mm的虹吸管。
파체지하수위상승시유발활파적중요인소，실시배출지하수시방치변파지질재해적유효수단。홍흡배수구유면동력화류동과정유액위변화자동공제적물리특성，가만족실시배출파체지하수적수요，단홍흡관중공기적루회도치홍흡과정중단，제약료변파홍흡배수기술적추엄응용。용해우수적공기인홍흡관내압력강저이석출시형성기포적물리기출。실험결과표명，홍흡진수구수면이상수직고도3．5m이상취회출현대량기포，경과홍흡정점후，기포발생강렬적겸병형성대기포。당홍흡관적진출수구적수두차교대시，기포간적수탄용역추동기포종출수구배출。당홍흡관직경대우5 mm시，완만적홍흡류동，회발생관내기포적적루，최종파배홍흡과정；홍흡관적직경소우4 mm시，가이형성기본은정적탄상류。인차，위보지변파홍흡과정장기유효，경상성강우병차파체지하수봉부적지구가선용직경위5 mm적홍흡관，비경상성강우적지구응선택소우등우4 mm적홍흡관。
Rising slope underground water level is an important factor inducing landslide ,real-time discharge groundwater is an effective means to prevent the slope geological disaster .The siphon drainage with no power and flowing process by the change of the liquid level automatic control of the physical properties ,which can meet the real time need of slope groundwater discharge .But the straw air accumulation leads to siphon destruction , and restricts slope of siphon drainage technology popularization and application .The air dissolved in the water due to the reduced pressure within the siphon overflow is the physical basis of the bubble forming .The experimental results show that ,the siphon water inlet above the water surface of the vertical height of 3 .5 m above will appear a large number of bubbles ,through siphon vertex ,bubble generation strongly merger into large bubbles .When the rainbow straw inlet head difference is bigger ,bubble water bomb easily push the air bubbles are discharged from the water outlet .When the rainbow straw diameter is greater than 5 mm ,slow siphon flow ,occurs within the tube bubble accumulation ,eventually destroying the siphon process ,rainbow straw with diameter less than 4 mm ,can form stable slug flow .Therefore ,in order to keep the slope siphon process effective long-term ,the rainbow straw can be chosen 5 mm in diameter in regular rainfall and slope ungroundwater rich area and less than or equal to 4 mm in diameter in non recurring rainfall area .