Reconstruction structure of an existing bridge abutment in bridge jacking

Abstract

The invention relates to a reconstruction structure of an existing bridge abutment in bridge jacking, comprising a new pier column, an existing bridge abutment, a new pile foundation, an abutment sidewidth, a new cap, an old pile foundation and an original support system of a jacking system. The new pile foundation is symmetrically distributed with respect to the old pile foundation. The old pilefoundation and the new pile foundation form a new cap. The new pile foundation is uniformly arranged at the edge of the new cap. The new cap is located below the bottom plane of the existing bridge abutment and the original support system of the jacking system is arranged above the existing abutment. The new cap is the bearing structure of the new pier column, and the new cap is located in the transverse position of the old pile foundation. The invention has the beneficial effects that in the construction of the new pier column, the existing bridge abutment is cut and removed, and between thelower part of the jacking system and the new bearing cap, the high-strength grouting material is poured and densified, so as to become a underpinning structure, ensure the safety of the whole construction, and shorten the construction period in order to ensure the stability of the whole jacking system.

Description

technical field [0001] The invention relates to an abutment reconstruction structure, in particular to a reconstruction structure and a construction method of an existing abutment during bridge jacking. Background technique [0002] With the deepening of my country's urbanization process, in order to meet the ever-increasing traffic demand, the construction of viaducts has spread all over the important joints. With the rapid development of politics and economy, it is often necessary to improve traffic in combination with the characteristics of the region itself. In recent years, some domestic bridges have been built. Due to factors such as the improvement of traffic and navigation requirements under the bridge, and the need for bridge scale extension, it is necessary to upgrade the bridge to achieve the purpose of improving the clearance under the bridge and adjusting the line shape of the bridge. At present, for such old bridge reconstruction schemes, demolition and new co...

AI Technical Summary

Problems solved by technology

However, due to the difficulty of bridge jacking construction, especially in the jacking reconstruction of landing bridges, the treatment of the existing abutment is more complicated: the existing abutment must be used as the fulcrum of the jacking system, and at the same time, the existing abutment needs to be Newly built substructures such as pier columns, caps, and pile foundations at the abutment position

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