Strain computer-controlled beam support and change method

Abstract

An underpin method of building beam column, which is added with a strain instrument and a computer control device in the beam column underpin construction. The computer control device is connected to the strain gauge affixed on the support structure and surface of displaced structure or component, when adopting mechanical jack pair structure or component to exert jack lift force value in the unloading process, the strain of structure is transported to the computer control system by the strain gauge, which can exactly response to the internal force of the underpinned structure, deformation of structure, residual deformation of structure, internal force of the supporting structure and so on, thereby the operator can know actual stressed state of the structure and adopt the dial gauge to monitor structure displacement to provide reliable reference for loading, at last achieving purpose of structure unloading and ensuring safety of the operator and structure in the beam column underpin construction.

Description

technical field [0001] The invention relates to a beam-column underpinning construction control method, in particular to a beam-column underpinning method controlled by a computer strain control system. The utility model belongs to the technical field of direct application to building structure reinforcement and transformation engineering. Background technique [0002] At present, the existing beam-column underpinnings are basically supported underpinnings, that is, the components to be replaced are not unloaded, and the adjacent structures or components are directly supported, so as to avoid large deformation and damage to the structure after replacement. for purpose. For important structures with large loads and small deformation requirements, hydraulic jacks are currently used in underpinning construction, such as mechanical equipment such as hydraulic jacks with additional stress test instruments, to apply controlled jacking force for unloading. Due to the defects of oi...

AI Technical Summary

Problems solved by technology

For important structures with large loads and small deformation requirements, hydraulic jacks are currently used in underpinning construction, such as mechanical equipment such as hydraulic jacks with additional stress test instruments, to apply controlled jacking force for unloading. Due to the defects of oil return and oil leakage in hydraulic jacks , which makes it difficult to control the force value during the construction process. It must be continuously monitored, which consumes a lot of energy and time for technicians. The jacking force cannot be constant, and it is impossible to combine the applied jacking force with the strain of the structure during the unloading process. , to achieve the purpose of safe and accurate unloading

Therefore, in the existing underpinning technology, the adjacent structure of the replaced component after underpinning is prone to damage such as cracks and deformation, which affects the safety and durability of the structure.

Moreover, because the existing underpinning technology cannot reflect the real stress state of the displaced component and the adjacent structure during the replacement process, there is a greater danger to both the structure and the operator.

The current beam-column underpinning technology cannot combine the applied jacking force with the strain of the structure during the unloading process, so as to reflect the lack of real stress state of the structure during the unloading process

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