带卸荷板的整体式闸室结构抗浮稳定性研究

Study on anti-floating stability of dock type lock chamber with relieving slabs

带卸荷板的整体式闸室作为一种新型水工结构,其检修期抗浮稳定性是结构设计的关键问题。依托工程实例,基于加载系数法,建立不带卸荷板的整体式闸室结构抗浮稳定性数值分析模型,与依据规范计算的结果进行对比,验证其可靠性;将该方法用于带卸荷板的整体式闸室结构抗浮稳定性分析,结果表明卸荷板设置在墙后排水管安装高程附近对提高结构抗浮稳定性有显著效果;根据分析结果,提出了适用于该结构的抗浮稳定安全系数计算方法,并论证了方法的可行性。

As a new type of hydraulic structure, the anti-floating stability of a dock type lock chamber with relieving slabs during maintenance period is a key issue in its structural design. Based on an engineering project and the loading coefficient method, a numerical anti-floating stability analysis model is established for a dock type lock chamber without relieving slabs,and its reliability is verified by comparing with the results calculated according to the standard. This method is then used to analyze the anti-floating stability of a dock type lock chamber with relieving slabs and the results show that, when the relieving slabs are located near the level of drain pipes behind the wall, they will have a significant effect on the improvement of the antifloating stability of the structure. Based on the results of analysis, a computing method is proposed for the calculation of the anti-floating stability safety factor, and the feasibility of the method is demonstrated.