基于物理模型试验的库区岩质滑坡涌浪爬高研究

库区滑坡涌浪会对附近岸坡造成不利影响,可能引发次生灾害。以岩质滑坡涌浪对岸坡的影响演变过程为研究对象,建立了相似比1∶70的三峡库区典型河道滑坡涌浪的三维地质力学模型,研究了滑坡体宽度、厚度、滑面倾角等27组不同组合工况下的滑坡涌浪爬高规律,提出了适用于岩质滑坡涌浪爬高估算公式。结果表明,涌浪爬高随着滑坡体宽度、厚度、滑面倾角增大而呈现不同幅度的增加,滑坡体宽度对涌浪爬高的影响最为显著,其次为滑坡体厚度和滑面倾角;现有波浪爬高估算公式结果与岩质滑坡模型试验值存在较大差异,在试验基础上,提出了有关相对水深、波坦和岸坡角度的波浪爬高的估算公式,为库区岩质滑坡涌浪爬高估算提供理论基础。

Impulse wave run2up generated by reservoir rocky landslides based on physical model experiments

Impulse w ave g ener ated by landslide in the r eser voir ar ea w ill adversely affect nearby bank slo pes and may cause sec2 o ndary disasters. This study took the ev olution pr ocess of the impact o f impulse w ave generated by r ocky landslide on bank slopes as the study o bject , and established a 3D geomechanical model o f impulse wav e g ener ated by ro cky landslide in the Thr ee Gor ges r eser voir ar ea w it h a similarity ratio of 1 B 70. We studied the law of run2up of impulse w ave g enerated by ro cky land2 slide thr ough 27 sets o f mo del tests with different combinat ions o f w idth, thickness, and slip angle o f the landslide, and pr oposed a fo rmula for estimating the run2up o f im pulse w ave generated by ro cky landslide. The r esults showed that the r un2up of impulse wav e w ould increase w ith the incr ease in w idth, thickness, and slip ang le o f the landslide. The w idth of the landslide had the most signif icant effect o n the impulse wav e r un2up, followed by the thickness of the landslide and the slip ang le of the landslide. The result of the ex isting w ave r un2up estimatio n formula differ ed gr eatly fr om that of the r ocky landslide mo del test value. Based o n the ex periment, w e pr oposed a formula fo r estimating the w ave run2up using the relat ive depth, Potain, and bank slope ang le, which can pro vide a theor et ical basis for estimating r un2up o f impulse wav e g ener ated by r ocky landslide in the r eser vo ir area.