Joint connecting structure for connecting steel tower and concrete tower base and construction method thereof

Abstract

The invention discloses a joint connecting structure for connecting a steel tower and a concrete tower base, which comprises the concrete tower base, the steel tower, a UHPC (Ultra High Performance Concrete) mud jacking layer and a prestress tension structure, a mud jacking notch is formed in the top of the concrete tower base, and the UHPC mud jacking layer is fixedly arranged in the mud jacking notch; a steel bottom plate is arranged at the bottom of the steel tower, a shearing force connecting piece is arranged at the bottom of the steel bottom plate, and the steel bottom plate is fixedly connected with the UHPC grouting layer through the shearing force connecting piece; and the prestress tensioning structure is arranged between the concrete tower base and the steel tower in a tensioning mode. The invention further provides a construction method of the connector connecting structure for connecting the steel tower and the concrete tower base. By means of the structure, the concrete pouring difficulty and the steel plate machining difficulty can be effectively reduced, it can be ensured that the joint connecting structure has good strength and rigidity, the disease risks of cracking, water seepage and the like at the joints are effectively reduced, and safe and durable operation of steel-concrete mixed bridge towers of a large-span cable-stayed bridge and a suspension bridge is ensured.

Description

technical field [0001] The invention belongs to the field of bridges, in particular to a joint connection structure for bridge towers and a construction method thereof. Background technique [0002] In cable-stayed bridges and suspension bridges, the bridge tower is the main force-bearing component, which is composed of tower base, tower body, beam, etc. from bottom to top, and the tower body is mostly concrete structure. Steel structure bridge towers have the advantages of high strength, light weight, and easy hoisting and construction, so they are very suitable for bridges with high seismic fortification or high landscape requirements. Since the tower base is a concrete structure, one of the key issues in the design and construction of the steel tower is how to connect the steel tower and the concrete tower base to form a whole, and effectively transfer the load from the tower body, which has become one of the keys to the design of the steel tower . [0003] At present, ...

AI Technical Summary

Problems solved by technology

No matter which form is used, it is generally necessary to fill the steel tower joints with concrete. Ordinary concrete has coarse aggregates, poor fluidity, and is easy to segregate during pouring, which increases the difficulty of construction. If the concrete fails to fill the inside of the steel tower, it may affect Safety and durability of steel-concrete hybrid pylon joints

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