Seismic retrofit method for existing pile foundation buildings

Abstract

The invention relates to a seismic retrofit method for existing pile foundation buildings. The seismic retrofit method solves the problem that potential safety hazards exist in the existing old buildings without the seismic performance when earthquakes occur and comprises the steps of cutting soil bodies downwards, constructing new supporting pile caps, arranging supporting devices, removing original pile foundations in a chiseling mode, installing seismic insulation supports and constructing a layer of beam plates. The seismic insulation supports are installed on the bottoms of upper structures of the existing buildings, and the seismic wave energy can be obviously prevented from being transmitted to the upper structures when the earthquakes occur; the layer of beam plates is poured on the top of a seismic insulation layer, the upper structures of the existing buildings keep integral, and therefore the overall coordination work ability of seismic insulation mechanisms is improved; the soil bodies are excavated one by one on original supporting pile caps, and therefore the supporting performance of the ambient soil bodies is guaranteed.

Description

technical field [0001] The invention relates to a seismic isolation reinforcement method, in particular to a seismic isolation reinforcement method for existing pile foundation buildings for seismic isolation reinforcement reconstruction. Background technique [0002] my country is an earthquake-prone country, especially in recent years, frequent earthquakes have caused huge casualties and economic losses. In order to more effectively reduce the threat of earthquake disasters to people's life and property safety, the latest national standard "Code for Seismic Design of Building Structures" (GB50011-2010) was promulgated on May 31, 2010 and implemented on December 1 . The promulgation and implementation of the new code has further improved my country's seismic design standards, further clarified the seismic design concept of building structures in my country, and provided a guarantee for safer and more reliable seismic design of upcoming construction projects. [0003] But ...

AI Technical Summary

Problems solved by technology

[0006] The invention solves the defects that the existing old buildings have no anti-seismic performance and hidden safety hazards in the epicenter, and provides a seismic isolation reinforcement method for existing pile foundation buildings, which replaces the seismic isolation bearings at the lower part of the existing pile foundations of the old buildings, and The structure above the seismic isolation support forms a solid connection to improve the overall horizontal seismic performance of the old building

[0007] The present invention also solves the problem that in the existing seismic isolation construction, the seismic isolation support is directly replaced in the column of the superstructure, causing the columns at the upper and lower parts of the seismic isolation support to be divided into two sections, which cannot resist the horizontal vibration cycle as a whole. The defects that increase the probability of column toppling at the upper and lower parts of the seismic isolation support provide a seismic isolation reinforcement method for existing pile foundation buildings, replacing the seismic isolation support at the lower part of the existing pile foundation of the old building, and installing The above structure forms a fixed whole, which reduces the horizontal toppling coefficient of the column above the seismic isolation support

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