Orifice flood discharge structure in concrete dam

Abstract

The invention relates to the technical field of concrete dams, in particular to an orifice flood discharge structure in a concrete dam. The structure comprises an orifice steel liner arranged along awater flow direction, wherein a concrete structure is poured around the orifice steel liner, the orifice steel liner comprises a plurality of steel liner sections which are sequentially connected andarranged, and the steel liner sections each comprise a top plate, a left side plate, a bottom plate, a right side plate, a first connecting folded plate, a second connecting folded plate, a third connecting folded plate and a fourth connecting folded plate. Welding seams formed by welding of the components are butt welding seams, the butt welding seams are more convenient for groove cutting and welding construction compared with fillet welding seams formed by welding in the prior art, the thickness of the periphery of the butt welding seams is consistent, the welding quality and reliability are improved, a detection operation surface is a plane, and the detection of the welding quality is also convenient. Moreover, the four corner edges of the steel liner sections are not right angles, sothat the problem of stress concentration at the four right-angle corner edges is avoided, the concrete structure is more favorable for vibrating and compacting, and the construction quality is improved.

Description

technical field [0001] The invention relates to the technical field of concrete dams, in particular to an orifice flood discharge structure in a concrete dam. Background technique [0002] Large and medium-sized concrete dams are equipped with a rectangular orifice flood discharge structure. The rectangular orifice flood discharge structure includes an orifice steel lining arranged along the direction of water flow. Concrete structures are poured around the orifice steel lining. Connect the set steel lining section, the cross-sectional shape of the steel lining section is rectangular, and it is welded by four steel plates in turn, the top plate, the left plate, the bottom plate and the right plate. Arranged perpendicular to each other, the weld formed by welding is a fillet weld. The shape of the corner of the fillet weld is irregular and the thickness is inconsistent, which brings difficulties to the accurate detection of ray and other detection methods and affects the weld...

AI Technical Summary

Problems solved by technology

[0002] Large and medium-sized concrete dams are equipped with a rectangular orifice flood discharge structure. The rectangular orifice flood discharge structure includes an orifice steel lining arranged along the direction of water flow. Concrete structures are poured around the orifice steel lining. Connect the set steel lining section, the cross-sectional shape of the steel lining section is rectangular, and it is welded by four steel plates in turn, the top plate, the left plate, the bottom plate and the right plate. They are arranged perpendicular to each other, and the weld formed by welding is a fillet weld. The shape of the corner of the fillet weld is irregular and the thickness is inconsistent, which brings difficulties to the accurate detection of ray and other detection methods and affects the welding quality detection effect.

At the same time, there are stress concentrations at the four right-angle corners of the steel lining joint, which is not conducive to the compaction of the concrete structure and affects the construction quality of the rectangular orifice flood discharge structure

Images