Three-branch tree-shaped arc gate support arm and construction method

Abstract

The invention belongs to the technical field of hydraulic arc gate support arm structures, and discloses a three-branch tree-shaped arc gate support arm and a construction method. The three-branch tree-shaped arc gate support arm is characterized in that the ratio of the included angle Alpha formed by a first branch arm and a third branch arm to each included angle Beta formed by an upper branch arm and a lower branch arm among the three branch arms is 2.04; the unit stiffness ratio of a trunk arm to the first branch arm or the third branch arm is 9.57; the unit stiffness ratio of the trunk arm to a second branch arm is 8.76; the length ratio of the trunk arm to the first branch arm or the third branch arm is 0.98; the length ratio of the trunk arm to the second branch arm is 0.94; and thecross-sectional height ratio and the thickness ratio of the trunk arm to the first branch arm or the second branch arm or the third branch arm are 1.805 and 1.405 respectively. The three-branch tree-shaped arc gate support arm structure is the minimum in size, the largest in overall structural buckling load and capable of solving the problem of contradiction between large-rigidity, high stabilityand light weight of a large-scale arc gate.

Description

technical field [0001] The invention belongs to the technical field of a hydraulic arc gate support arm structure, and in particular relates to a trifurcation tree arc gate support arm and a construction method. Background technique [0002] The support arm of the arc gate is mainly used to bear the water load generated by the arc gate panel. The traditional arc gate support arm has two forms: two arms and three arms. The investigation found that all kinds of gate accidents were caused by severe vibration, which caused the instability and damage of the support arm. The reason was analyzed that the stiffness distribution between the door leaf and the support arm was unreasonable, and the support arm stiffness was weak. The investigation also found that the accident rate of the three-arm arc gate is relatively large. The reason is that the current "Code for Design of Steel Gates in Water Conservancy and Hydropower Engineering (SL74-2013)" adopts the traditional arc gate main f...

AI Technical Summary

Problems solved by technology

[0005] Due to the continuous emergence of high dams and large reservoirs, the commonly used three-arm structure of the gate cannot simultaneously meet the requirements of large stiffness, high stability and light weight in large arc gate structures; Arm structure optimized for lightness and stability

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