Method of jacking up and adding floors and seismic isolation of frame structure buildings

Abstract

The invention discloses a method for jacking storey-addition and shock insulation of a framework-structure building. The method includes the following steps that earth is excavated to expose foundations; an added bottom layer frame beam is cast among frame columns; a plurality of jacking devices are arranged between the added bottom layer frame beam and the top surfaces of the foundations; the connecting positions between the roots of the frame columns and the foundations are cut off; the building is jacked up through the jacking devices, and the perpendicularity and the levelness of the building are monitored and controlled in real time in the jacking process; after the building is jacked to an appointed height, cushion blocks at the bottoms of the frame columns are all taken out, and meanwhile shock insulation supports are installed at the tops of the foundations; added frame columns are added between the shock insulation supports and the original frame columns; and the jacking devices are uninstalled, foundation pits are filled back, and the ground is recovered. Storey addition of the frame-structure building is realized, shock insulation is realized for the building with a poor anti-seismic property, and repeated construction of a roof waterproof project and a heat insulation layer and reinforcement of bottom layer members are avoided.

Description

technical field

[0001] The invention belongs to the technical field of civil engineering, and relates to a method for implementing story-adding and earthquake-isolation of an existing building by using jacking, in particular to a method for jacking-up story-adding and earthquake-isolation of a frame structure building. Background technique

[0002] Adding floors to existing buildings is an effective way to protect land resources, expand the use area, and improve use functions. Adding a layer on the top of a building requires removing the insulation and waterproof layer of the original roof, and constructing a new insulation and waterproof layer on the top of the newly added structure layer, which is likely to cause waste of resources; The vertical members at the bottom have insufficient bearing capacity and need to be reinforced. However, underpinning piles and the like need to be set at the basement of the building, and the cost is relatively high.

[0003] Due to histori...

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