混凝土联锁块护底软体排抗掀稳定分析

针对规范中软体排抗掀稳定计算公式未考虑水深影响的问题,对水流作用下混凝土联锁块软体排受力进行研究。采用理论推导方法,得出了新的混凝土联锁块软体排抗掀稳定计算公式,结合数模分析确定新公式的相关参数取值。新公式中考虑了水深的影响,采用临界断面平均流速替代规范公式的软体排边缘临界流速,较规范公式更为准确。分别采用新公式和规范公式对黑沙洲水道航道整治二期工程护底软体排抗掀稳定进行计算。分析结果表明:新公式较规范公式更能反映软体排实际受力情况。工程实践证明新公式具有较好的可靠性,可供类似工程参考和借鉴。

Anti-overturning stability analysis of concrete interlocking blocks bottom protection soft mattresses

For the problem that the calculation formula of anti-overturning stability of concrete interlocking blocks does not consider the influence of water depth in the standard formula,the stress of concrete interlocking blocks underwater current is studied,and new calculation formula of anti-lifting stability of concrete interlocking blocks is obtained by theoretical deduction method,then the relevant parameters of the new formula are determined by combining mathematical model analysis. In the new formula,the influence of water depth is considered,and the critical current velocity at the edge of the soft mattress is replaced by the average current velocity of the critical section,which is more accurate than the standard formula. In this paper,new formulas and standard formulas are respectively adopted to calculate the anti-overturning stability of bottom protection soft mattresses of the Heishazhou channel regulation project Phase II. The analysis results show that the new formulas can better reflect the actual force of soft mattresses than the standard formulas. Engineering practice proves that the new formulas have better reliability and can be used for reference of similar projects.