摘要
为充分利用软体排与扭双工字透水框架的各自结构护底优势、减少工程投资,通过水槽试验研究了潜堤下游两者联合护底的水动力特性、防护效果及适用部位、布置方式等关键技术问题。结果表明坝脚附近出现下沉水流、堤坝后存在横轴环流;框架群可有效减缓水平向滩面水流,但无法消减越堤的竖向水流,框架不能直接抛投于堤脚或坝脚处,应抛投于软体排的下排边;排边框架抛投宽度以20 m左右(5 m搭接)为宜,框架抛投密度以2个m2时效果最佳;成果可为工程设计提供技术参考。
To make full use of the advantages of soft mattress and twisted double ＂H＂ permeable frame for bottom protection, and reduce the project investment, we study the hydrodynamic characteristics, the protective effect and applicable parts and arrangement of the submerged breakwater downstream＇ s soft mattress and twisted double ＂H＂ permeable frame joint bottom protection by the generalized flume test. The results show that sinking current appears near the dam base and transverse circulation emerges behind the dam; The framework group can effectively slow down the level surface water flow to the beach, but it is unable to reduce the vertical flow of overflow the dike. The framework can not be directly thrown into the base of the dike or the base of the dam, so the framework should be thrown into the soft mattress of bottom edge. A side frame thrown width of about 20 m （5 m overlapping） is advised, and the framework thrown density of 2 sets/m^2 is the best. The results can provide technical reference for the engineering design.
出处
《水运工程》
北大核心
2015年第7期1-7,共7页
Port & Waterway Engineering
基金
交通运输部科技项目(2013328J17500)
关键词
潜堤下游
联合护底
软体排
扭双工字透水框架
水槽试验
submerged breakwater downstream
joint bottom protection
soft mattress
twisted double ＂H＂ permeable frame
flume experiment
