【摘要】：通過分析航道整治護(hù)灘工程邊緣防沖促淤結(jié)構(gòu)不足,提出水草墊結(jié)構(gòu),并開展定床和動床模型試驗,研究不同倒伏程度、不同布置形式、不同水動力條件下水草墊的防沖促淤效果。結(jié)果表明:當(dāng)流速較小時葉片彎曲幅度較小;流速增加至0.3 m/s時,葉片彎曲幅度較大;流速增至0.73 m/s時,葉片彎幅度增加較小。葉片倒伏60°情況,水草墊稀疏布置,防護(hù)效果較好;倒伏75°情況,水草墊密集布置,其防護(hù)效果較好。當(dāng)來流速度較大時,水草墊區(qū)域內(nèi)有較大淤積幅度,但淤積范圍明顯縮窄,側(cè)緣坡度較陡,防護(hù)效果并不理想。在此基礎(chǔ)上,確定了水草墊結(jié)構(gòu)。
[Abstract]:Based on the analysis of the deficiency of scour and siltation structure at the edge of waterway regulation and beach protection project, the structure of water and grass cushion is put forward, and the model tests of fixed bed and moving bed are carried out to study the different lodging degree and different arrangement forms. Anti-scouring and silting effect of water grass pad under different hydrodynamic conditions. The results show that the bending amplitude of the blade is smaller when the velocity is small, the bending amplitude of the blade is larger when the velocity increases to 0.3 m 鈮，

本文編號：2475256