摘要
本文介绍汾河水库8m 泄洪排沙洞岩塞爆破水力冲渣的水工模型试验成果及与原型观测成果的比较。该工程的主要特点是洞口前库区已有18m 厚的淤泥,且淤积泥沙粒径很细,干容重平均为1-25t/ ,岩石破碎。
The result of hydraulic model test on the rock plug blasting and the ballast sluicing for the 8m-diameter sluice tunnel of the Fenhe Reservoir and the comparison made of the experimental results with the prototype observation results are introduced.The main views of the writers are as follows (1)it is feasible carrying out the rock plug blasting under the condition that in the front of the sluicing tunnel,there has been a thick silt,of which the particle is very fine,the mean dry density is only 1 25 t/,and the thickness is as high as about 18m,in the reservoir,the position of the rock plug being in the intake of the sluicing tunnel and under the silt.(2)the efficency of the ballast sluicing under the condition having a thick silt in the reservoir is about ten percent higher than that under the condition having only clear water in the reservoir.(3)the effciency of ballast sluicing is closely related to the ballast and its grading in addition to hydraullc condition,the smaller the ballast,the higher is the efficiency of the ballast sluicing.(4)the flow having ballast has no any significant influence on the tunnel wall and other structures,this may be due to the reason that the silt laden flow coming from the reservoir exerted a lubricating action between the ballast and the tunnel wall with a low moving speed of only 2-3m/s.The result of hydraulic model test is basically consistent with that of the prototype observation.
出处
《山西水利科技》
1999年第4期34-36,共3页
Shanxi Hydrotechnics
关键词
岩塞爆破
水力冲渣
模型试验
汾河水库
淤泥
Rock Plug Blasting Hydraulic Sluicing Model Test Fenhe Reservoir
