泥石流梁式格栅坝拦砂性能试验研究

通过特殊泥石流试验装置 ,对泥石流梁式格栅坝拦砂性能进行研究 ,初步得到 :梁式格栅坝有全部闭塞、临时闭塞、半闭塞、未闭塞 4种闭塞类型。当梁间距 b与泥石流体中最大颗粒粒径 dm ax之比 b/ dmax≤ 1.0时 ,格栅坝基本闭塞 ;b/ dmax≥ 1.5时 ,格栅坝未闭塞 ;1.0

Characteristics of Intercepting Sediment of Debris Flow Check Dam

By using a special experimental devices of debris flow, a seriseof model tests on debris flow passing through check-dem are car ried out. The shape of cross-section of model channel is rectangle with a width 25cm, the gradient is 0～25%. The solid material used in the test are take from Chengdu city, the gravel's maximum diameter is 5cm,10cm,15cm,20cm,25cm, 30cm,35cm.The distance between beam is 1.5cm,2.0cm,3.0cm. The experimental resul ts show that there are 4 main kind of closing conditions, the closing conditions of check dam are closely linked to the ratio b/dmax of distance between be am to the gravel's maximum, and the gradient of channel.