Column underpinning device and construction method

Abstract

The invention provides a column underpinning device and a construction method. The column underpinning device comprises a ferrule body and underpinning steel frames; the ferrule body is provided witha drum-shaped column base surrounding portion, and a drum-shaped column base can be surrounded and lifted by the drum-shaped column base surrounding portion; and the ferrule body is provided with through holes, and the underpinning steel frames are arranged in the through holes in a penetrating mode. According to the column underpinning device and the construction method, the underpinning processof columns can be simplified, the construction efficiency can be improved, the construction cost and the energy consumption can be reduced, and secondary disturbance to the building structure can be prevented.

Description

technical field [0001] The invention belongs to the technical field of ancient building repairs, and in particular relates to a column underpinning device and a construction method. Background technique [0002] The traditional column underpinning technology uses a temporary support system such as scaffolding to transfer most of the load on the upper part of the column to the temporary foundation through the temporary support system. The underpinning beam is partially embedded in the lower part of the foundation stone of the column. After the construction of the underpinning beam is completed, the earthwork at the lower part of the foundation stone will be excavated, and then the concrete will be poured and connected with the underpinning beam as a whole, finally achieving column underpinning. [0003] The traditional column underpinning technology can only be used when the load on the upper structure of the column is small. During the construction, the upper structure need...

AI Technical Summary

Problems solved by technology

[0003] The traditional column underpinning technology can only be used when the load on the upper structure of the column is small. During the construction, the upper structure needs to be reinforced and underpinned in multiple stages, and the lower underpinning structure is not easy to dismantle after the construction is completed, which will affect the restoration of the floor. And the demolition process will cause a large secondary disturbance, especially for buildings with protection requirements.

Under the premise of a large load on the upper structure, the difficulty of precision control in the process of jacking and underpinning increases sharply, and the secondary disturbance to the structure is more serious

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