水流作用下混凝土联锁排稳定厚度确定

Firstly, the unstable mechanism of the concrete mattress for the methods in the code and American formula was analyzed. And then according to the analysis of the unstable mechanism of the different parts, the formulas of the thickness for the different parts’ concrete mattress were confirmed. The results show that the unstable model of the formula about the weight of ballast is slippage or roll under the water drag. But those of the lifting formula and American formula are floating or lifting under the water uplift force. They also indicate that the unstable model for the edge of the concrete mattress is roll under the water drag and uplift action. And that for the inner is lifting only under the water uplift force. The results obtained from the proposed formulas were compared with the factual engineering in the Yangtze estuary deepwater channel. It can be concluded that the proposed formulas in this paper can give reasonable thickness of the concrete mattress.