门槽充水对塔式进水口工作性态的影响研究

Influence of Water-filling Gate Slot on Tower Type lntake Working Behavior

坝下涵管作为重要输水建筑物,在土石坝工程中被广泛应用。其进水口启闭竖井塔柱结构遭遇设计洪水位甚至校核洪水位时,竖井内工作门槽及检修门槽常常会充水,此时结构受力状态与常水位下存在差异。采用有限元法对某工程进行仿真分析,分析门槽充水对塔式进水口工作性态的影响。研究结果表明,各工况下结构位移和应力分布规律基本一致,且数值均较小。校核洪水位下,检修闸门门槽及工作闸门门槽内充满水体,结构位移及主拉应力均小于正常蓄水位工况,门槽充水对结构的稳定性和安全裕度具有增强作用。

As an important water conveyance structure,culvert pipes under the dam are widely used in in earth-rock dam engineering.When the tower column structure of the water inlet hoist shaft encounters the design water level or even the check water level,the working gate slot and the maintenance gate slot in the shaft will often be filled with water,at this time,the stress state of the structure is different from that under the normal water level.In this paper,the finite element method is used to simulate a project and analyze the influence of sluice slot filling on the working behavior of tower inlet.The results show that the structural displacement and stress distribution laws are basically consistent under various working conditions,and the values are small.Under the check flood level,the bulkhead gate slot and the service gate slot are full of water.At this time,the structural displacement and the main tensile stress are less than the normal water storage level.Therefore,the water filling of the sluice slot can enhance the stability and safety margin of the structure.