斜坡波压力计算公式经验性较强, 计算公式种类繁多。为了探讨经验公式在预测滑坡涌浪对斜坡作用力的适 用性问题, 构建几何比尺为 1 B 70 的滑坡涌浪三维物理模型, 试验研究了不同工况时滑坡涌浪最大波与有效波下斜 坡作用力的变化规律, 采用 3 种常用的斜坡波压力经验公式, 对比分析了滑坡涌浪下滑坡入水点正对岸斜坡波压力 大小、作用点位置及分布特性。结果表明, 3 种经验公式计算结果有较大的差异, 基于试验结果, 路基公式经修正后 可用于预测滑坡涌浪下斜坡波压力大小; 向金公式经修正后可用于预测滑坡涌浪破碎作用点位置; 波压力在斜坡上 的分布趋势与苏联公式是一致的。

The slo pe w ave pressur e calculation is hig hly empirical and has a w ide variety o f calculatio n fo rmulas. In order to ex2 plo re the applicability o f empirical fo rmulas in pr edicting t he pressur e o f landslide2g ener ated impulse w ave on the slo pe, we con2 str ucted a three2dimensio nal phy sical mo del of landslide2generated impulse w ave w ith a g eometric scale o f 1: 70. We studied the variatio n law o f slo pe wav e pressur e under the maximum and the effectiv e landslide2g ener ated impulse w aves under differ ent wo rking conditio ns. Three commo nly used empirical fo rmulas for slope w ave pressur e w ere used for comparison and analysis of the mag nitude, action po int positio n, and distributio n char acteristics of the pressur e of landslide2g ener ated impulse w ave o n the slope that was directly o pposit e the w ater entry point of the landslide. The r esults show ed that the results o f the three empirical formulas w ere quite different. Accor ding t o t he test r esults, the modified Subgr ade Fo rmula can be used to predict t he magnitude of the slo pe w ave pr essure under landslide2generated impulse w ave; the modified Fo rmula can be used to predict the br eaking point position of landslide2generated impulse w ave; the distribution t rend of the w ave pressur e o n the slo pe is consist2 ent w ith the So viet Standard Formula.

国家自然科学基金( 51479015) ; 重庆市基础研究与前沿探索( 重点) 项目( cst c2017jcyjBX0070)