淤泥河治理抛石护岸工程试验研究

Experimental Study on Riprap Revetment Treatment Project of Silt River

以开封祥符区、杞县的淤泥河排涝河道整治工程为例,对所在河道抛石护岸治理过程及效果进行了模型分析与过程模拟。结果表明,抛石是较为理想的护岸材料,对河床变形适应性强,且抛石护岸施工效果主要与块石料粒径、使用方量和岸坡覆盖率等有关;三层小颗粒石料不均匀铺护的护岸铺护效果明显优于块石不均匀铺护;对于水深大且流速快的河段严格按照设计要求抛投施工,而对于水深小且流速缓慢的河段,必须加强抛投过程控制,避免块石料堆积而影响抛填护岸效果。

The model analysis and process simulation of riprap revetment treatment are carried out on the process and effect of the silt river drainage and rehabilitation project located in Xiangfu District and Qi County,Kaifeng City.The results show that riprap is an ideal revetment material with strong adaptability to riverbed deformation.The construction effect of riprap revetment is mainly related to the particle size of rubble,the quantity of use and the coverage rate of bank slope.The effect of bank protection of uneven spreading of three layers of small stone material is obviously better than that of uneven spreading of block stone.For the river reach with large water depth and fast flow velocity,the throwing construction is strictly in accordance with the design requirements,while for the river section with small water depth and slow flow rate,it is necessary to strengthen the throwing process control so as to avoid the accumulation of rubble affecting the effect of bank protection.