混凝土联锁块软体排压载块抗水流掀动稳定性研究

Physical and numerical model study on anti-rolling stability of concrete interlocking blocks by current

通过稳定性物模、Fluent二维数模、受力测试等手段,研究和分析纯流条件下4种常用混凝土联锁块护底软体排压载块的稳定性、失稳过程、失稳临界流速,以及水深和压载部位(排边缘、搭接处、中间部位)等因素对压载块稳定性的影响。根据研究结果对现行规范公式提出了水深、结构尺寸及压载部位等因素的修正。在此基础上,提出了3种新型压载块结构形式,并与常用压载块进行了比较。结果表明,3种新型压载块稳定性均好于现用的4种压载块。

The anti-rolling stability, failure process and critical velocity of 4 commonly applied concrete interlocking blocks are tested and analyzed by physical model tests, Fluent-2D calculation and force tests. The influence of water depth and location （at the edge, lap joint, or middle of the bed-protection mattress） on the block＇s anti-rolling stability is also studied. A modification of the formula in the current specification is proposed, involving water depth, block structure and location. Then, 3 new-type blocks are designed and compared with the commonly used block. The results show that the anti-rolling stability of the 3 new-type blocks is certainly better than that of the commonly used 4.