基于旋转水槽试验的水下泥石流底部水压研究  

STUDY ON WATER PRESSURE AT BOTTOM OF SUBAQUEOUS DEBRIS FLOW IN ROTATING FLUME TEST

作　　者：邓检良[1] 张向霞 DENG Jianliang;ZHANG Xiangxia(School of Naval Architecture,Ocean,and Civil Engineering,Shanghai Jiaotong University,Shanghai 200240,China;Shanghai Urban Construction Design&Research Institute,Shanghai 200125,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]上海城建设计研究院,上海200125

出　　处：《工程地质学报》2020年第5期1000-1006,共7页Journal of Engineering Geology

基　　金：国家重点研发计划(资助号:2016YFC0401908);浙江省建设科研项目(资助号:2018K104)。

摘　　要：水下泥石流的低阻力运动特性研究是研究水下泥石流运动机理的重要内容,水下泥石流底部的水压对泥石流运动阻力有重要影响。为此,采用旋转水槽实验室模拟水下泥石流的低阻运动,实测水下泥石流视摩擦角;采用新开发的测量系统,实测水下泥石流底部的水压,评估水下泥石流底部的静水压和附加水压。试验结果和理论分析表明,在水下泥石流底部的附加水压与水下泥石流的低阻力运动密切相关:水下泥石流密集流的最大厚度为12 mm的条件下,附加水压最大值达69 Pa。研究成果为揭示水下泥石流低阻力运动机理提供实验依据,新开发的测量系统为低阻力运动泥石流的水压测量开辟新途径。The low-resistance motion characteristics of subaqueous debris flow is an important topic to study the mechanism of subaqueous debris flow.The water pressure at the bottom of the subaqueous debris flow is an important factor to reduce the resistance.Rotating flume tests are performed to reproduce the low-resistance motion of subaqueous debris flow and to measure the reach angle of dense granular flow granular flow in the subaqueous debris flow.The newly developed measurement system is used to measure the water pressure at the bottom of the dense granular flow granular flow,and to evaluate the static and additional water pressure at the bottom of the dense granular flow granular flow.The experimental results and theoretical analysis show that the additional water pressure at the bottom of the subaqueous debris flow is related to the low resistance motion of the subaqueous debris flow.The maximum thickness of the dense granular flow granular flow is 12 mm,while the maximum additional water pressure is 69 Pa.This research provides an experimental method for revealing the mechanism of low resistance motion of subaqueous debris flow.The newly developed measurement system provides a new way for the water pressure measurement of debris flow with low resistance motion.

关 键 词：水下泥石流 密集流 视摩擦角 旋转水槽试验 

分 类 号：P64223[天文地球—工程地质学]