Connection method and structure for variable-section continuous rigid frame aqueducts

Abstract

The invention discloses a connection method and structure for variable-section continuous rigid frame aqueducts. The connection method comprises the steps that a transition aqueduct is arranged between the single-hole aqueduct and the two-hole aqueduct, the single-hole aqueduct and the two-hole aqueduct with different sections are connected together smoothly through the transition aqueduct, and sudden connection change generated in the connection position of the single-hole aqueduct and the two-hole aqueduct is avoided; and meanwhile, a base plate of the transition aqueduct is provided with a water-stop device through which water is prevented from gradually seeping into the connection position, and the base plate of the transition aqueduct is prevented from being corroded. According to the connection method and structure, the problem that the connection stress of an existing connection structure is reduced due to sudden connection change generated in the connection position of the single-hole aqueduct and the two-hole aqueduct is solved through the method that the transition aqueduct is added to the connection position of the single-hole aqueduct and the two-hole aqueduct. Meanwhile, the water is prevented from gradually seeping into the connection position through the water-stop device, so that the deficiency that the water seeps into the connection position, the base plate of the transition aqueduct is corroded, and consequently corrosion damage is generated to structural concrete and reinforcing steel bars, cracking of construction joints is generated finally, and accordingly the durability of the aqueducts is severely influenced, and even the safety of a structure is affected are overcome.

Description

Technical field [0001] The present invention involves a connection method and structure of a variable section of continuous rigid structure, which belongs to the field of waterfield technology in water conservancy projects. technical background [0002] With the rapid development of my country's water conservancy projects, the application of large spans and drainage and drainage grooves is becoming more and more widely used.The bottom surface of the large span transmission and drainage rigid heaponic tank is usually arched. Therefore, the vault part is usually composed of a single -room box beam. It is usually composed of a dual -room box beam near the arched end.The connection problem of the box beam. [0003] The existing single -room box beams and dual -chamber box beams of the existing rigid heaponic tank are direct connection methods. Because the single -room box beam is different from the cross -section of the double -chamber box beam, a construction seam with a cross -sect...

AI Technical Summary

Problems solved by technology

[0003]The single-chamber box girder and the double-chamber box girder of the existing continuous rigid frame aqueduct are directly connected. Due to the different shapes, there will inevitably be a construction joint with a sudden change in section at the connection point. Because the sudden change in the section at the construction joint will cause stress concentration, there will be hidden dangers in construction quality. Cause the erosion and damage of structural concrete and steel bars, and eventually lead to the cracking of construction joints, seriously affecting the durability of the aqueduct, and even affecting the safety of the structure

The direct connection between single-chamber box girder and double-chamber box girder in most existing continuous rigid-frame aqueducts cannot ensure the service life and structural safety of continuous rigid-frame aqueducts

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