Vertical supporting method of underground top-down storey addition of existing high-rise building

Abstract

The invention discloses a vertical supporting method of underground top-down storey addition of an existing high-rise building. According to the vertical supporting method, not only is the safety of an original basement structure of the building in the excavation process guaranteed, but also the problem of certain compression differential deformation generated in the underpinning process and later use process of added structural columns in a storey-adding basement in the prior art is effectively solved. The vertical supporting method of underground top-down storey addition of the existing high-rise building sequentially includes the following steps that firstly, a circle of newly built fender posts are arranged on the periphery of original fender posts of the building; secondly, a horizontal supporting structure and static pressure steel tube piles of the original basement of the building are constructed; thirdly, further downward excavation is carried out in the newly built fender posts until the designed base elevation is met, and therefore the storey-adding basement is formed under the original basement of the building; fourthly, a storey-adding basement bearing platform and a storey-adding basement base plate are constructed; and fifthly, the added structural columns of the storey-adding basement are subjected to underpinning construction.

Description

technical field [0001] The invention relates to the field of underground upside-down storey addition of existing high-rise buildings, in particular to a vertical support method for underground upside-down storey addition of existing high-rise buildings. Background technique [0002] With the continuous development of the urbanization process, the contradictions and problems of urban land resources and space development have become increasingly prominent, the use of underground space has continued to be three-dimensional, and urban construction has shown a development trend of aboveground-underground surface-deep underground. Rational development and utilization of the space below the basement of existing urban buildings is one of the effective ways to solve the contradiction between urban land resources and space development. In the underground upside-down construction of existing high-rise buildings, the original basement structure of the building needs to be supported duri...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies existing in the prior art, to provide a kind of structure that can not only ensure the safety of the original basement structure of the building during the excavation process; During the replacement process and later use, there will be a certain degree of compression differential deformation, resulting in differential deformation between columns and between columns and shear walls, and causing additional internal forces and deformations of different degrees in the existing superstructure. The vertical support method of underground upside-down and multi-storey addition of existing high-rise buildings where the superstructure will have adverse effects

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