Displacement method of defective concrete of column body

Abstract

The invention provides a displacement method of a defective concrete of a column body. The displacement method comprises the following steps of: respectively arranging displacement platforms on the upper end and the lower end of a column displacement layer as supporting ends of a steel pipe jack so as to carry out a disposable underpinned displacement of the defective concrete of a reinforced concrete frame column directly. In the displacement method, only the steel pipe jack support is arranged on the displacement layer, and multilayer continuous beam support of the steel pipe jack is unnecessary, the supporting load of the steel pipe jack is directly transmitted to the displacement platforms once, and the load is returned to an upper layer of the column body and a lower layer of the column body through the displacement platforms, so that a stress condition is clear and reasonable, the setting number of steel pipe jacks is reduced greatly; furthermore, a construction working face is small, so that the construction influence range is only located on the displacement layer, a layer on the displacement layer and a layer under the displacement layer. The displacement method of the defective concrete of the column body, provided by the invention, has the characteristics of simple design and construction, low construction cost, safety, reliability and the like.

Description

technical field [0001] The invention relates to the field of building reconstruction and reinforcement, in particular to a method for replacing concrete with column body defects. Background technique [0002] When the reinforced concrete frame structure (or frame-shear structure) building has local concrete defects in the column body or the concrete strength does not meet the design requirements due to improper technical measures or poor construction management during the construction process (collectively referred to as defective concrete), it is necessary to repair the column body. For reinforcement. Reinforcement of reinforced concrete frame columns generally includes enlarging section method, outsourcing steel method and column defect concrete replacement method, etc. The use of the enlarged section method will affect the requirements of the building for the use of space; the outsourcing steel method cannot be used for columns whose axial compression ratio cannot meet t...

AI Technical Summary

Problems solved by technology

[0006] (1) The continuous joist replacement technology is adopted, which affects many layers of the structure, the internal force redistribution of the structure is complicated during the replacement, and the analysis and calculation of internal force and the selection and design of steel pipe jacks are relatively cumbersome

[0007] (2) The construction work area is large, the construction process is more complicated, and more steel pipe jacks need to be installed, the project cost is high, and the construction period is long

[0008] (3) The area of ​​the filling wall to be removed is large, and the construction cost is relatively high

[0009] (4) Since continuous joists need to install steel pipe jack devices on more floors, deformation control during construction is difficult and structural safety hazards are relatively large

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