A kind of underpinning reinforcement method of existing building structure

Abstract

The invention discloses an underpinning reinforcement method for an existing building structure. Brackets are arranged and reinforced on an original supporting structure column, and a steel pipe supporting device is additionally arranged; enlarged section reinforcement is conducted on the basis of an original pre-reserved structural column, thus the purpose of improving the basic bearing capacityis achieved, and the design requirements of the basic bearing capacity after underpinning are met. Compared with an existing underpinning technology, the underpinning reinforcement method fully utilizes the original structure, damage is small, and the new structure is basically consistent with the original structure in form and coordinates with the original structure for common bearing; before theunderpinned column is removed, a foundation of the pre-reserved structural column is reinforced, reinforcement of the enlarged section and additionally arranged reinforcing bars is conducted, the bearing capacity is increased, and stiffness is improved; the overall economic adaptability is high, the cost is low, economic rationality is achieved, the construction period is short, and the influenceon adjacent surrounding shallow foundations is small; and the underpinning reinforcement method is suitable for application of underpinning transformation of buildings such as large powerhouse structures, gymnasium structures, large shopping mall structures, subway structures and various broken column transformation use spaces.

Description

technical field [0001] The invention belongs to the technical field of underpinning and transformation of existing buildings, and in particular relates to an underpinning and strengthening method for existing building structures. Background technique [0002] The supporting structure of the building is basically composed of supporting structural columns, beams, and axillary beams. The supporting structural columns, beams, and axillary beams jointly support the weight of the roof surface; figure 1 with figure 2 Shown is the supporting structure of a building house, figure 1 is a structural schematic diagram of a side view; figure 2 1 is the structural schematic diagram of the top view; 1 is the supporting structure column on the two outer sides, 2 is the middle supporting structure column, and 3 is the supporting main beam of the sky (ie ceiling, roof); figure 1 with figure 2 It shows the situation of a larger building; the larger the building, the larger the overall s...

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Problems solved by technology

[0003] During the renovation process, it may be necessary to remove some supporting structural columns in the middle and retain some supporting structural columns in the middle; for example, the owner needs a larger space to install a large object, just figure 2 The four intermediate support structure columns 2 form an obstacle, and the middle support structure column 5 needs to be retained; at this time, these intermediate support structure columns 2 need to be removed. In order not to collapse the sky, it is also necessary to The main girders associated with these supporting structural columns are underpinned, and new main girders are used to bear the load; however, the existing underpinning technology has great damage to the original structure, low safety performance, long construction period, and low construction cost. higher

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