CAJ | 학술논문

泥石流窗口坝是一种常见的泥石流防治工程措施，具有拦砂节流、护床固坡等重要调节功能。为了探寻泥石流的过坝特征，通过室内模拟试验，运用控制变量的方法对不同类型泥石流的过坝情况进行了探讨。试验发现，泥石流过坝前后颗粒组成的变化与泥石流密度相关性较大，在泥石流密度为1650 kg／m3时，窗口坝对泥石流的筛选能力最强；泥石流过坝后密度降低情况较明显，并且受泥石流窗口坝闭塞类型的影响，不同闭塞类型下泥石流密度降低率具有相似规律，在泥石流密度为1800 kg／m3左右时，泥石流密度降低率最大；通过回归分析得到了拦排比 L 与泥石流密度γc 的关系式。
니석류창구패시일충상견적니석류방치공정조시，구유란사절류、호상고파등중요조절공능。위료탐심니석류적과패특정，통과실내모의시험，운용공제변량적방법대불동류형니석류적과패정황진행료탐토。시험발현，니석류과패전후과립조성적변화여니석류밀도상관성교대，재니석류밀도위1650 kg／m3시，창구패대니석류적사선능력최강；니석류과패후밀도강저정황교명현，병차수니석류창구패폐새류형적영향，불동폐새류형하니석류밀도강저솔구유상사규률，재니석류밀도위1800 kg／m3좌우시，니석류밀도강저솔최대；통과회귀분석득도료란배비 L 여니석류밀도γc 적관계식。
As a common measure of preventing debris flows,window-frame dam has functions of intercepting sedi-ment and protecting riverbed and slopes.Through indoor simulation,the characteristics of debris flows passing through window dam was researched by controlling different variables.Results reveal that the variation of particle composition of debris flows before and after passing through the dam is largely correlated with the density of debris flow.When the density of debris flow is 1 650 kg/m3 ,the window dam’s sediment interception capacity is the lar-gest.The density of debris flow decreases remarkably after passing through the window dam,and the decrease is af-fected by the type of window dam blocking;the regularity of decrease is similar despite different blocking types;when the density is around 1 800 kg/m3 ,its decrease is the largest.By regression analysis the relation between sediment interception ratio L and debris flow density γc was also obtained.