Construction method for temporarily supporting and strengthening reinforced concrete structured beam by using steel column

Abstract

The invention discloses a construction method for temporarily supporting and strengthening a reinforced concrete structured beam by using a steel column. The method for temporarily supporting and strengthening the reinforced concrete structured beam is finished by the following construction steps of: arranging a base steel plate of the steel column; stringing a bolt hole to draw and lift steel column members; adjusting the verticality of the steel column and limiting the position; arranging and fixing a steel column jacking support; tightening and prepressing the steel column by using a simple jack, welding to form a steel column bearing base support, and the like. The construction method has the advantages of simple assembly and disassembly, low labor intensity, low labor and material consumption, and good effect of the formed temporary support structure.

Description

Technical field: [0001] The invention relates to a building engineering construction technology, which is a construction method for temporarily supporting and reinforcing reinforced concrete structural beams with steel columns. Background technique: [0002] In the construction process of civil engineering and construction engineering, it is often necessary to arrange large-scale construction machinery and equipment such as construction elevators on reinforced concrete structural beams, or due to temporary traffic requirements during construction, it is necessary to walk heavy-duty machinery vehicles on structural beams, or due to reinforced concrete structures The hoisting and installation of heavy components on the beam slab requires the use of large-scale hoisting equipment on the structural beam slab. These construction measures and methods will cause serious overloading of the corresponding reinforced concrete structure, and its use function will be greatly changed, whic...

AI Technical Summary

Problems solved by technology

There are two common temporary support reinforcement methods, one is to use ordinary scaffolding steel pipe full support system, such as fastener steel pipe support or bowl buckle steel pipe support, with adjustable support to complete the reinforced concrete beam slab structure In order to meet the requirements of bearing capacity, especially under the action of local concentrated load, the temporary support reinforcement of the temporary support, the spacing between the support poles is generally very close, the support erection arrangement or dismantling and cleaning is difficult, the time is long, and the consumption of support materials Large, wide range of safety and quality control, large quantity, many factors that may lead to support failure

The other is to use the steel pipe column temporary support method, place the steel column at the bottom of the beam, and use the hydraulic jack to pre-press the steel column to support it. After completing the reliable bearing support of the steel column foundation, withdraw the hydraulic jack to form a steel column Support, the temporary support of this kind of steel column can only bear pressure but not tension; because of the friction constraint caused by the support pressure only at the upper and lower fulcrums of the steel column, in order to ensure the support stability of the steel column, horizontal tie rods are generally required between the steel columns and scissor braces; it is precisely because this kind of steel column temporary support can only bear pressure but not tension, under the action of large tonnage movement (change) load on the structural beam slab, it must be noted that some steel column temporary supports may not be affected Force, unable to form a reliable temporary restraint support with the structural beam, resulting in changes in the line stiffness of some beam sections, and a large increase in the load on the section of the local beam section

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