A connection method and structure of a variable cross-section continuous rigid frame aqueduct

Abstract

The invention discloses a connection method and structure of a variable section continuous rigid structure aqueduct. The method is to set a transition groove between the single-hole aqueduct and the double-hole aqueduct, and connect two single-hole aqueducts and double-hole aqueducts with different cross-sections smoothly through the transition groove, avoiding the connection between the single-hole aqueduct and the double-hole aqueduct. At the same time, a water stop device is installed on the bottom plate of the transition tank to prevent the water at the connection from gradually infiltrating and eroding the bottom plate of the transition tank. The invention solves the structural mutation of the existing connection structure caused by the connection of the single-hole aqueduct and the double-hole aqueduct by adding a transition groove at the connection of the single-hole aqueduct and the double-hole aqueduct, and slows down the connection stress. At the same time, the water stop device is used to prevent the water at the connection from gradually infiltrating and eroding the bottom plate of the transition tank, which will cause erosion and damage to the structural concrete and steel bars, and eventually lead to the cracking of the construction joints, which seriously affects the durability of the aqueduct and even affects the safety of the structure. .

Description

technical field [0001] The invention relates to a connection method and structure of a variable cross-section continuous rigid frame aqueduct, which belongs to the technical field of aqueducts in water conservancy projects. [0002] technical background [0003] With the rapid development of water conservancy projects in our country, the application of continuous rigid frame aqueducts with large spans and drainages is becoming more and more extensive. The bottom surface of the continuous rigid frame aqueduct with large span is usually arched, so the vault part is usually composed of a single-chamber box girder, and the double-chamber box girder is usually used near the arch end, so there must be a single-chamber box girder and a double-chamber box girder. Connection problem of box girder. [0004] The single-chamber box girder and the double-chamber box girder of the existing continuous rigid frame aqueduct are directly connected. Since the cross-sectional shapes of the sing...

AI Technical Summary

Problems solved by technology

[0004] The single-chamber box girder and the double-chamber box girder of the existing continuous rigid frame aqueduct are directly connected. Since the cross-sectional shapes of the single-chamber box girder and the double-chamber box girder are different, a construction joint with a sudden change in section will inevitably appear at the connection point. , due to the sudden change of section at the construction joint will cause stress concentration, there are hidden dangers in the construction quality, due to the large expansion and contraction of the continuous rigid frame aqueduct, and the water body in the aqueduct body will gradually cause erosion and damage to the structural concrete and steel bars, eventually leading to cracking of the construction joint , which seriously affects the durability of the aqueduct, and even affects 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

Images