带卸荷板的整体式闸室结构受力与变形有限元分析

Finite element analysis of stress and deformation of relieving platform in the monolithic lock chamber structure with relieving platform

带卸荷板的整体式闸室结构作为一种新型的水工结构,应用于浍河南坪船闸工程。利用有限元数值模拟,分析卸荷板的高度、宽度和厚度对闸墙的水平位移、土压力和弯矩分布等的影响。在卸荷板宽度和厚度不变的情况下,闸墙的水平位移随着卸荷板高度的增加呈现先减小后增大的趋势,对于卸荷板的宽度和厚度也有类似的规律;随着卸荷板高度增大,卸荷板上方的闸墙土压力变化不大,卸荷板下方的闸墙土压力随着卸荷板高度的增加先减小后增大,对于卸荷板的宽度和厚度也有类似的规律。闸墙上部为正弯矩,下部出现负弯矩。原设计方案中设计的高度、宽度和厚度较为合理。

As a new type of hydraulic structure the monolithic lock chamber structure with relieving platformhas been used in Huihe Nanping lock chamber engineering.Using FEM numerical simulations , the influences of the height width and thickness of the relieving platform on the horizontal displacement , soil pressure and bending moment distribution of the lock wall are analyzed. In the case of constant width and thickness of the relievin gplatform , with the increase of the relieving platform height , the horizontal displacement of the lock wall tends todecrease and then increase , and similar patterns can be applied for the width and thickness of the relieving platform.With the increase of the relieving platform height , the soil pressure of the lock wall above the relieving platform changed little , the soil pressure of the lock wall under the relieving platform tends to decrease and increase , and similar patterns can be applied for the width and thickness of the relieving platform.The upper part of the lock wallis the positive bending moment ,and the lower part is the negative bending moment.The height, width and thickness of the original scheme are reasonable.