Reinforcing system of existing main beam column in concrete frame structure

Abstract

The invention discloses a reinforcing system of an existing main beam column in a concrete frame structure. The reinforcing system solves the problem of how to scientifically and effectively reinforce existing concrete beams and columns. Transverse planes of an original concrete beam are added in the front side direction, the rear side direction and the downward direction, and an original square concrete column is expanded outwards to the periphery so as to increase the section of the original concrete column. Grouting and annular stirrup penetrating through holes are drilled in a floor plate on the outer side of the junction of an original concrete beam and an original square concrete column at equal intervals, and beam section increasing beam main reinforcements and beam stirrups are annularly distributed on the outer side of the periphery of the original concrete beam. A post-pouring beam formwork system with the enlarged beam section and a post-pouring beam formwork system with the enlarged column section which are communicated with each other are built, so that a reinforced beam column system which synchronously expands outwards and has the synchronously enlarged section is built; the construction process is simple, scientific and reasonable, and a construction route is explored for reinforcement of existing beam columns.

Description

Technical Field

[0001] The invention relates to a main beam column existing in a concrete frame structure, and in particular to a reinforcement system for reinforcing the main beam column existing in the concrete frame structure. Background Art

[0002] The structural system of civil high-rise buildings is mostly a concrete frame structure, which is mainly composed of concrete walls, concrete columns, concrete beams and concrete slabs, among which the concrete columns are the main load-bearing supporting members. After the construction of the original concrete main structure is completed, due to the change of the later use function, the load demand of the original concrete beams and columns is greater than the original design bearing capacity requirements, and the existing concrete beams and columns need to be strengthened to meet the bearing capacity requirements after the increase in load. The existing technology is to strengthen the concrete beams and columns by increasing their cross-sections, but how to scientifically and effectively strengthen the existing concrete beams and columns has become a problem that urgently needs to be solved on site. Summary of the invention

[0003] The invention provides a reinforcement system for existing main beams and columns in a concrete frame structure, solving the technical problem of how to scientifically and effectively strengthen the existing concrete beams and columns.

[0004] The present invention solves the above technical problems through the following technical solutions: The overall concept of the present invention is: to increase the cross section of the original concrete beam in the forward and rearward directions and in the downward direction, and to expand the original square concrete column outward in all directions to increase its cross section; to drill holes for grouting and annular stirrups at equal intervals on the floor slab outside the intersection of the original concrete beam and the original square concrete column, to arrange the main reinforcement and stirrups of the beam in an annular manner on the outside of the original concrete beam to increase the cross section, and to construct a reinforced beam-column system with synchronous expansion and synchronous cross section increase by setting up a connected beam cross section enlargement post-casting formwork system and a column cross section enlargement post-casting beam formwork system.

[0005] A reinforcement system for main beams and columns in a concrete frame structure comprises a completed lower concrete floor slab, original concrete frame columns have been constructed on the lower concrete floor slab, original concrete beams have been constructed on the tops of the original concrete frame columns, an upper concrete floor slab that has been constructed is connected to the original concrete beams, an upper concrete floor slab ground layer is arranged on the top surface of the upper concrete floor slab and the top surface of the original concrete beam, a space for removing the ground layer is arranged on the top surface of the original concrete beam, grouting and annular stirrups are arranged through holes at intervals on the upper concrete floor slab outside the original concrete beam, a U-shaped closed beam section enlargement post-casting beam template is arranged on the lower bottom surface of the upper concrete floor slab outside the grouting and annular stirrups through the through holes and below the original concrete beam, a beam section enlargement top beam main reinforcement is arranged in the space for removing the structural layer, beam section enlargement side elevation beam main reinforcement positioning reinforcement is implanted on the front and rear facades of the original concrete beam, the beam section enlargement side elevation beam main reinforcement positioning reinforcement is connected to the outer end of the beam section enlargement side elevation beam main reinforcement positioning reinforcement, The main reinforcement positioning bars of the lower bottom surface of the beam with increased cross section are implanted, and the main reinforcement of the lower bottom surface of the beam with increased cross section is connected to the outer end of the main reinforcement positioning bars of the lower bottom surface of the beam with increased cross section. Annular stirrups of the main reinforcement of the beam with increased cross section are arranged in the holes through which the grouting and annular stirrups pass. The annular stirrups of the main reinforcement of the beam with increased cross section successively stirrup the main reinforcement of the beam at the top of the increased cross section, the main reinforcement of the side vertical surface of the increased cross section and the main reinforcement of the lower bottom surface of the beam with increased cross section; the post-planted upper column main reinforcement is implanted on the lower bottom surface of the original concrete beam outside the original concrete frame column, and the main reinforcement of the upper column is implanted on the original concrete frame column. The post-planted lower column main reinforcement is implanted on the lower concrete floor slab outside the concrete frame column, the lower end of the post-planted upper column main reinforcement is connected with the upper end of the post-planted lower column main reinforcement through the overlap welding area, and annular closed column stirrups are arranged at intervals between each post-planted lower column main reinforcement and each post-planted upper column main reinforcement. On the lower concrete floor slab outside the post-planted lower column main reinforcement, a U-shaped closed column section enlarged post-cast beam template is arranged, and the top end of the column section enlarged post-cast beam template is connected with the beam section enlarged post-cast beam template.

[0006] The original concrete frame column is a square concrete column. Post-planted column main reinforcement positioning bars are implanted at intervals on the outer facade of the original concrete frame column. The outer ends of the post-planted column main reinforcement positioning bars are welded together with the post-planted lower column main reinforcement; the ground layer space is removed, grouting and annular stirrups pass through the through holes, the U-shaped closed beam section is enlarged, the inner space of the post-cast beam template is enlarged, and the inner space of the U-shaped closed column section is enlarged. The formwork is connected together.

[0007] A method for constructing a reinforcement system of an existing main beam column in a concrete frame structure comprises the following steps: The first step is to remove the upper concrete floor slab ground layer on the top surface of the original concrete beam to obtain a groove-shaped ground layer removal space; Step 2: On the four side elevations of the original concrete frame column, the main reinforcement positioning bars for the post-planted columns are arranged at intervals; Step 3: implant the post-planted upper column main reinforcement on the lower bottom surface of the original concrete beam outside the original concrete frame column, implant the post-planted lower column main reinforcement on the lower concrete floor slab outside the original concrete frame column, and weld the lower end of the post-planted upper column main reinforcement and the upper end of the post-planted lower column main reinforcement together through the lap welding area; Step 4: Weld the outer ends of the positioning bars of the post-planted column main bars to the post-planted lower column main bars together; tie annular closed column stirrups at intervals on each post-planted lower column main bar, and tie annular closed column stirrups at intervals on each post-planted upper column main bar; Step 5: Drill holes for grouting and annular stirrups at intervals on the upper concrete floor slab outside the original concrete beam, and set the upper ports of the holes for grouting and annular stirrups in the removed ground layer space; Step 6: implant the main reinforcement positioning bars of the side vertical beam with increased beam section on the front and rear side vertical surfaces of the original concrete beam, and implant the main reinforcement positioning bars of the lower bottom beam with increased beam section on the lower bottom surface of the original concrete beam; Step 7: Evenly set the main reinforcement of the top beam with increased cross-section on the upper concrete floor slab in the space removed from the ground layer; evenly set the main reinforcement of the side vertical beam with increased cross-section on the outer sides of the front and rear vertical surfaces of the original concrete beam, and weld the outer ends of the main reinforcement of the side vertical beam with increased cross-section and the positioning reinforcement of the main reinforcement of the side vertical beam with increased cross-section together; evenly set the main reinforcement of the lower bottom beam with increased cross-section below the lower bottom surface of the original concrete beam, and weld the outer ends of the main reinforcement of the lower bottom beam with increased cross-section and the positioning reinforcement of the main reinforcement of the lower bottom beam with increased cross-section together; Step 8: After the annular stirrups of the beam main reinforcement with increased cross section are passed through the grouting and the annular stirrups are passed through the through holes, the top beam main reinforcement with increased cross section, the side beam main reinforcement with increased cross section and the bottom beam main reinforcement with increased cross section are hooped together in sequence; Step 9: On the lower bottom surface of the upper concrete floor slab where the grouting and annular stirrups pass through the through hole and below the original concrete beam, a U-shaped closed beam cross-section enlarged post-casting beam template is set up to form a concrete beam casting template system with an enlarged beam cross-section covering the original concrete beam; Step 10: Set up a U-shaped closed column section enlarged post-casting beam formwork between the beam section enlarged post-casting beam formwork and the lower concrete floor slab to form a concrete column casting formwork system with an enlarged column section covering the original concrete frame column, and connect the concrete beam casting formwork system with an enlarged beam section and the concrete column casting formwork system with an enlarged column section together; Step 11: by removing the ground layer space, concrete is poured into the concrete column casting formwork system with increased beam section and the concrete beam casting formwork system with increased column section, so as to form a concrete beam with increased beam section and a concrete column with increased column section; Step 12. After the poured concrete solidifies, remove the U-shaped enlarged column section enclosed post-cast beam formwork and the U-shaped enlarged beam section enclosed post-cast beam formwork respectively.

[0008] The present invention constructs a complete steel reinforcement system inside the column outside the original concrete column, and constructs a complete steel reinforcement system inside the beam outside the original concrete beam, and connects the two systems together. After uniformly pouring concrete, effective reinforcement of the beams and columns is achieved. The construction process is simple, scientific and reasonable, and a construction route is explored for the reinforcement of existing beams and columns. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 BB section view in the figure; Figure 3 yes Figure 1 AA section view in. DETAILED DESCRIPTION

[0010] The present invention is described in detail below in conjunction with the accompanying drawings: A reinforcement system for main beams and columns in a concrete frame structure, comprising a lower concrete floor slab 1 that has been constructed, an original concrete frame column 2 that has been constructed on the lower concrete floor slab 1, an original concrete beam 3 that has been constructed on the top of the original concrete frame column 2, an upper concrete floor slab 11 that has been constructed connected to the original concrete beam 3, and an upper concrete floor slab ground layer 4 that is arranged on the top surface of the upper concrete floor slab 11 and the top surface of the original concrete beam 3; due to changes in the use function of the building in the later period, the bearing capacity of the original concrete frame column 2 and the original concrete beam 3 changes, and it is necessary to increase the cross section of the original concrete frame column 2, and It is necessary to increase the cross-section of the original concrete beam 3, and to set the main reinforcement in the column and the reinforcement in the beam outside the original concrete frame column 2, on the outside of the vertical surfaces on both sides of the original concrete beam 3 and below the bottom surface of the beam, and to set up a secondary pouring concrete formwork and pour secondary concrete to achieve the purpose of thickening the original concrete beam and column; first, remove the ground layer on the floor slab set on the top surface of the original concrete beam 3, and construct a groove-shaped space 18 for removing the ground layer to expose the structural layer of the upper concrete floor slab 11, and on the upper concrete floor slab 11 outside the original concrete beam 3, drill grouting and annular stirrups through the through holes 12 at intervals, and A U-shaped closed beam section enlargement post-casting beam formwork 17 system is set up on the lower bottom surface of the upper concrete floor slab 11 outside the through hole 12 and below the original concrete beam 3, and a beam section enlargement top beam main reinforcement 13 is arranged in the removed structural layer space 18, and beam section enlargement side elevation beam main reinforcement positioning reinforcement 19 is implanted on the front and rear side elevations of the original concrete beam 3, and the beam section enlargement side elevation beam main reinforcement 14 is connected to the outer end of the beam section enlargement side elevation beam main reinforcement positioning reinforcement 19, and the beam section enlargement lower bottom beam main reinforcement positioning reinforcement 20 is implanted on the lower bottom surface of the original concrete beam 3, and the beam section enlargement lower bottom beam main reinforcement positioning reinforcement 20 is connected to the outer end of the beam section enlargement lower bottom beam main reinforcement positioning reinforcement 20. The bottom beam main reinforcement 15, the top beam main reinforcement 13 of the beam section increase, the side beam main reinforcement positioning reinforcement 19 of the beam section increase, the bottom beam main reinforcement positioning reinforcement 20 of the beam section increase, the side beam main reinforcement 14 of the beam section increase and the bottom beam main reinforcement 15 of the beam section increase form a stable steel skeleton with the original concrete beam 3, realizing the surrounding covering of the original concrete beam 3; the annular stirrups 16 of the beam main reinforcement of the beam section increase are arranged in the grouting and annular stirrup through-hole 12, and the annular stirrups 16 of the beam main reinforcement of the beam section increase sequentially stirrup the top beam main reinforcement 13 of the beam section increase, the side beam main reinforcement 14 of the beam section increase and the bottom beam main reinforcement 15 of the beam section increase;The post-planted upper column main reinforcement 7 is implanted on the lower bottom surface of the original concrete beam 3 outside the original concrete frame column 2, and the post-planted lower column main reinforcement 6 is implanted on the lower concrete floor slab 1 outside the original concrete frame column 2. The lower end of the post-planted upper column main reinforcement 7 is connected to the upper end of the post-planted lower column main reinforcement 6 through the lap welding area 8. Between each post-planted lower column main reinforcement 6 and each post-planted upper column main reinforcement 7, an annular closed column stirrup 9 is arranged at intervals. The post-planted column main reinforcement and the annular closed column stirrup 9 realize the surrounding covering of the original concrete frame column 2. On the lower concrete floor slab 1 outside the post-planted lower column main reinforcement 6, a U-shaped closed column section enlarged post-casting beam template 5 is arranged, and the top end of the column section enlarged post-casting beam template 5 is connected to the beam section enlarged post-casting beam template 17. ;

[0011] The original concrete frame column 2 is a square concrete column, and post-planted column main reinforcement positioning reinforcement 10 is implanted at intervals on the outer facade of the original concrete frame column 2. The outer end of the post-planted column main reinforcement positioning reinforcement 10 is welded and connected with the post-planted lower column main reinforcement 6; the ground layer space 18 is removed, the grouting and annular stirrups pass through the through hole 12, the U-shaped closed beam section is enlarged, and the inner space of the post-cast beam template 17 and the inner space of the U-shaped closed column section is enlarged. The column template 5 is connected together, so that the secondary concrete pouring of the reinforced beam and column can be completed at one time.

[0012] A method for constructing a reinforcement system of an existing main beam column in a concrete frame structure comprises the following steps: The first step is to remove the upper concrete floor slab ground layer 4 on the top surface of the original concrete beam 3 to obtain a groove-shaped removed ground layer space 18; Step 2: on the four side elevations of the original concrete frame column 2, the post-planted column main reinforcement positioning reinforcements 10 are arranged at intervals to strengthen the strength of the post-planted column main reinforcements; The third step is to implant the post-planted upper column main reinforcement 7 on the lower bottom surface of the original concrete beam 3 outside the original concrete frame column 2, implant the post-planted lower column main reinforcement 6 on the lower concrete floor slab 1 outside the original concrete frame column 2, and weld the lower end of the post-planted upper column main reinforcement 7 and the upper end of the post-planted lower column main reinforcement 6 together through the overlap welding area 8; Step 4: weld the outer ends of the post-planted column main reinforcement positioning reinforcement 10 to the post-planted lower column main reinforcement 6; tie annular closed column stirrups 9 at intervals on each post-planted lower column main reinforcement 6, and tie annular closed column stirrups at intervals on each post-planted upper column main reinforcement 7; Step 5: drilling holes 12 for grouting and annular stirrups at intervals on the upper concrete floor slab 11 outside the original concrete beam 3, and setting the upper ports of the holes 12 for grouting and annular stirrups in the removed ground layer space 18; Step 6: implant the main reinforcement positioning bars 19 of the side vertical surface beam with increased beam section on the front and rear side vertical surfaces of the original concrete beam 3, and implant the main reinforcement positioning bars 20 of the lower bottom surface beam with increased beam section on the lower bottom surface of the original concrete beam 3; Step 7: The main reinforcement bars 13 of the top beam with increased cross section are arranged at equal intervals on the upper concrete floor slab 11 in the space 18 of the ground layer removed; the main reinforcement bars 14 of the side vertical beam with increased cross section are arranged at equal intervals on the outer sides of the front and rear vertical surfaces of the original concrete beam 3, and the outer ends of the main reinforcement bars 14 of the side vertical beam with increased cross section are welded together with the outer ends of the main reinforcement positioning bars 19 of the side vertical beam with increased cross section; the main reinforcement bars 15 of the lower bottom beam with increased cross section are arranged at equal intervals below the lower bottom surface of the original concrete beam 3, and the outer ends of the main reinforcement bars 15 of the lower bottom beam with increased cross section are welded together with the outer ends of the main reinforcement positioning bars 20 of the lower bottom beam with increased cross section; Step 8: After the annular stirrups 16 of the beam main reinforcement with increased cross section are passed through the grouting and the annular stirrups are passed through the through hole 12, the beam main reinforcement 13 at the top of the beam with increased cross section, the beam main reinforcement 14 at the side elevation of the beam with increased cross section and the beam main reinforcement 15 at the bottom of the beam with increased cross section are sequentially connected together; Step 9: On the lower bottom surface of the upper concrete floor slab 11 where the grouting and annular stirrups pass through the through hole 12 and below the original concrete beam 3, a U-shaped closed beam cross-section enlarged post-casting beam template 17 is set up to form a concrete beam casting template system with an enlarged beam cross-section covering the original concrete beam 3; Step 10: Set up a U-shaped closed column section enlarged post-casting beam template 5 between the beam section enlarged post-casting beam template 17 and the lower concrete floor slab 1 to form a concrete column casting template system with an enlarged column section covering the original concrete frame column 2, and connect the concrete beam casting template system with an enlarged beam section and the concrete column casting template system with an enlarged column section together; Step 11: by removing the ground layer space 18, concrete is poured into the concrete column casting template system with increased beam section and the concrete beam casting template system with increased column section to form a concrete beam with increased beam section and a concrete column with increased column section; Step 12: After the concrete to be poured solidifies, the U-shaped enlarged column section enclosed post-casting beam template 5 and the U-shaped enlarged beam section enclosed post-casting beam template 17 are removed respectively.

Claims

1. A reinforcement system for existing main beams and columns in a concrete frame structure, comprising a lower concrete floor slab (1) that has been constructed, an original concrete frame column (2) that has been constructed on the lower concrete floor slab (1), an original concrete beam (3) that has been constructed on the top of the original concrete frame column (2), an upper concrete floor slab (11) that has been constructed connected to the original concrete beam (3), and an upper concrete floor slab ground layer (4) that is arranged on the top surface of the upper concrete floor slab (11) and the top surface of the original concrete beam (3), characterized in that: A ground layer space (18) is provided on the top surface of the original concrete beam (3), and grouting and annular stirrup reinforcement through holes (12) are provided at intervals on the upper concrete floor slab (11) outside the original concrete beam (3). A U-shaped closed beam section enlargement post-casting beam template (17) is provided on the lower bottom surface of the upper concrete floor slab (11) outside the grouting and annular stirrup reinforcement through holes (12) and below the original concrete beam (3), and a beam section enlargement top beam main reinforcement (17) is provided in the structure layer space (18). 13), main reinforcement positioning bars (19) for increasing the cross section of the side vertical beam are implanted on the front and rear side vertical surfaces of the original concrete beam (3), the main reinforcement positioning bars (19) for increasing the cross section of the side vertical beam are connected to the main reinforcement (14) for increasing the cross section of the side vertical beam at the outer ends, main reinforcement positioning bars (20) for increasing the cross section of the lower bottom beam are implanted on the lower bottom surface of the original concrete beam (3), the main reinforcement positioning bars (20) for increasing the cross section of the lower bottom beam are connected to the main reinforcement (15) for increasing the cross section of the lower bottom beam at the outer ends, and a grouting and annular stirrups are provided in the through hole (12) through which the ring stirrups pass. The annular stirrups (16) for increasing the beam cross section of the beam main reinforcement are provided, and the annular stirrups (16) for increasing the beam cross section of the beam main reinforcement sequentially stirrup the beam main reinforcement (13) at the top of the beam cross section, the beam main reinforcement (14) at the side elevation of the beam cross section, and the beam main reinforcement (15) at the bottom of the beam cross section; the post-planted upper column main reinforcement (7) is implanted on the lower bottom surface of the original concrete beam (3) outside the original concrete frame column (2); the post-planted lower column main reinforcement (6) is implanted on the lower concrete floor slab (1) outside the original concrete frame column (2); The lower end of the main reinforcement (7) is connected to the upper end of the post-planted lower column main reinforcement (6) through an overlap welding area (8); between each post-planted lower column main reinforcement (6) and between each post-planted upper column main reinforcement (7), an annular closed column stirrup (9) is arranged at intervals; on the lower concrete floor slab (1) outside the post-planted lower column main reinforcement (6), a U-shaped closed column section enlarged post-casting beam template (5) is arranged; the top end of the column section enlarged post-casting beam template (5) is connected to the beam section enlarged post-casting beam template (17).

2. A reinforcement system for existing main beams and columns in a concrete frame structure according to claim 1, characterized in that: The original concrete frame column (2) is a square concrete column, and post-planted column main reinforcement positioning reinforcement (10) is implanted at intervals on the outer facade of the original concrete frame column (2), and the outer ends of the post-planted column main reinforcement positioning reinforcement (10) are welded and connected to the post-planted lower column main reinforcement (6); the ground layer space (18) is removed, the grouting and annular stirrups pass through the through hole (12), the U-shaped closed beam section enlarged post-casting beam template (17) inner space and the U-shaped closed column section enlarged post-casting beam template (5) inner space are connected together.

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