新型生态防洪护面连锁块的水力特性研究  

Study on hydraulic properties of chain concrete blocks for bank protection with the ecological function

作　　者：孙东坡[1] 张晓雷[1] 张献真 杨苏汀[1] 

机构地区：[1]华北水利水电学院,河南郑州450011 [2]河南省上蔡县水利局,河南驻马店463800

出　　处：《泥沙研究》2007年第3期44-49,共6页Journal of Sediment Research

基　　金：十一五国家科技支撑计划项目2006BAB06B00-04

摘　　要：通过模拟试验研究,检测了预制混凝土连锁块在洪水期水流中的受力状况,整体稳定性、孔内填充碎石的作用及连锁块阻力参数,综合分析了混凝土连锁块结构的力学稳定性和抗冲性,给出了碎石填充的要求及安全度。通过水面线观测与水力计算,提供了混凝土连锁块糙率与流速(Fr数)的关系。试验表明:新型生态防洪工程护面连锁块与传统堤防工程的护面形式相比,具有抗高切应力、稳定、透水性好、改善河道生态环境等优点。本文提供的填充碎石度及糙率等试验参数可供生态与防洪工程铺排连锁块的河渠水力设计参考。Through the experimental study on the mechanical stability and hydraulic characteristics of precast chain concrete blocks for the bank protection, the article examines the stress condition, the overall stability, the role of filling gravels and resistance parameters of chain block, comprehensive!y analyzes stability and anti-erosion of the structure of chain concrete blocks in the flood period, and gives the requirements of gravel filling and the degree of security. By the observation on water surface profiles and hydraulic calculations, this paper provides the relation between roughness of the chain concrete block and velocity. The experiment shows that compared with traditional forms of defending surface in riverbank construction, the new chain concrete block in ecology and flood-control projects has some merits, such as high anti-shear stress, stability, well-penetrating and eco-environment improving in the river course. Additionally, it is easy to construct and the cost is low. The research results can be references to the hydraulic design of canals for ecology and flood-control projects.

关 键 词：生态防洪工程 连锁块 脉动压力 抗冲性 

分 类 号：TV87[水利工程—水利水电工程]