水槽混合石料群抛试验

发布时间：2019-06-15 09:34

【摘要】：为研究混合石料群抛入水后的漂移与扩散情况,在试验室水槽内开展了不同水深、不同流速、不同质量组成的混合石料群抛试验。将单颗粒抛石漂移距离公式计算结果与混合石料群抛平均漂移距离进行比较,结果表明:当水深在15 m以内时,具有平均质量的单颗粒块石漂移距离与群抛试验平均漂移距离较为接近;当水深为30 m时,具有混合石料平均质量的单颗粒块石漂移距离明显大于群抛试验平均漂移距离;群抛与单抛漂移距离的偏差随流速的增大而增大。同时通过量纲分析得到了混合石料群抛水下分布面积计算公式,并将计算结果与实验室试验数据和现场观测数据进行比较,吻合较好。
[Abstract]:In order to study the drift and diffusion of mixed stone group after throwing into water, the throwing test of mixed stone group with different water depth, different velocity and different mass composition was carried out in the flume of laboratory. The calculation results of the drift distance formula of single particle throwing stone are compared with the average drift distance of mixed stone group. The results show that when the water depth is less than 15 m, the drift distance of single particle block stone with average mass is close to the average drift distance of group throwing test, and when the water depth is 30 m, the drift distance of single particle block stone with average mass of mixed stone material is obviously larger than that of group throwing test, and the drift distance of single particle block stone with average mass of mixed stone material is obviously larger than that of group throwing test when the water depth is less than 15 m. The deviation of drift distance between group throwing and single throwing increases with the increase of velocity. At the same time, through dimensional analysis, the formula for calculating the underwater distribution area of mixed stone group is obtained, and the calculated results are compared with the laboratory test data and field observation data, and the results are in good agreement with each other.
【作者单位】：长沙理工大学水利工程学院;中交天津航道局有限公司;
【基金】：国家重点研发计划(2016YFC0402108) 国家自然科学基金(51309038)
【分类号】：TV52

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