Inverted arch formwork applied to three-pipe one-connected concrete structure inverted siphon pipeline

Abstract

The invention discloses an inverted arch formwork applied to an inverted siphon pipeline of a three-pipe and one-connected concrete structure, which is used for the construction of the inverted siphon pipeline, comprising: an inverted arch formwork whose cross section is arc-shaped; The inverted arch formwork is fixedly connected; the cross-beam inner-pulling support beam is arranged on both sides of the upper end face of the truss, and is fixedly connected with the truss; the connection between the cross-beam inner-pulling support beam and the truss is provided with a through hole; Pull steel bars, which pass through the through holes, and are anchored to the floor surface. In the present invention, the truss and the inverted arch formwork are combined to form a whole, the strength of the inverted arch formwork is increased, and the deformation of the inverted arch formwork can be prevented during the concrete pouring process. At the same time, the cross beam is added to the truss and the support beam is pulled inward. By pulling the bottom surface of the tie bar, the buoyancy of the concrete is resisted during the concrete pouring process, which effectively increases the overall strength of the inverted arch formwork without generating floating form, and reduces the phenomenon of honeycomb pitting. happened.

Description

technical field [0001] The invention relates to the field of inverted siphon pipeline construction. More specifically, the present invention relates to an inverted arch formwork applied to an inverted siphon pipe of a three-pipe and one-joint concrete structure. Background technique [0002] The inverted siphon structure is generally used to make the water pass under the road or the ditch when the channel is close to the elevation of the road or the ditch, and is at a plane intersection. The water will flow from the side with higher pressure to the side with lower pressure. Although the atmospheric pressure on both sides of the water is the same, due to the difference in water level, the side with higher water pressure will flow downward due to gravity. [0003] The inverted siphon structure is often used in large-scale water intake projects in water conservancy projects, such as the middle route of the South-to-North Water Diversion Project, the Yangtze River Diversion Pro...

AI Technical Summary

Problems solved by technology

However, the traditional invert pouring adopts block splicing arc formwork. When pouring concrete, the anti-floating effect is poor, and it is easy to cause air bubbles at the floating formwork and vibrating arc ends that cannot be eliminated, and honeycomb pockmarks are prone to occur.

In addition, the inverted arch formwork lacks lateral support and is easily squeezed and deformed

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