CN117211549A - Kiln tail steel tube concrete column reinforcing device and method - Google Patents

Abstract

The invention discloses a device and method for reinforcing steel tube concrete columns at the end of a kiln. The reinforcement device includes a steel tube concrete column to be reinforced, original beam-column node ring plates, a number of vertical rib plates and a number of non-bending outer sealing plates. The vertical rib plates One side of the vertical edge is fixedly connected to the steel tube concrete column, the other side of the vertical edge is fixedly connected to the original beam-column node ring plate, the outer sealing plate is fixedly connected to the two adjacent vertical ribs, and all vertical ribs and outer sealing plates are made of steel tubes. The concrete columns form a closed regular polygon in the center, and the concrete-filled steel tube columns and outer sealing plates are filled with grouting material. All components are prefabricated in the factory, assembled and welded on site, and then filled with high-strength grouting material to expand the column cross-section. It has the advantages of low weight of single components, convenient transportation, and low lifting difficulty; high structural stability of individual components, It has the advantages of segmental assembly, ensuring construction safety and reliability, and solving the problems of difficult transportation of conventional components and difficulty in on-site correction.

Description

A device and method for reinforcing steel tube concrete columns at the kiln end

Technical field

The present invention relates to concrete column reinforcement, and in particular to a kiln tail steel tube concrete column reinforcement device and method.

Background technique

The conventional five-stage preheater process plan can no longer meet the requirements. It is necessary to change the kiln tail preheater from five stages to six stages. The significance is to reduce the temperature of the gas leaving the preheater and reduce the hot smoke of the preheater system. The heat loss taken away by the gas can thereby improve the heat exchange efficiency of the preheater, reduce the heat consumption of the system, and reduce the amount of coal used for combustion, thereby reducing CO2 emissions in cement production.

Changing the kiln tail preheater from five to six levels requires adding one layer to the original structure. The increase in load causes the original steel tube concrete columns to need to be reinforced to meet the design needs. Conventional steel bonding methods, welded steel pipe enlarged cross-section methods, etc. . The steel bonding method uses structural glue to stick the newly added steel plate to the original steel pipe column. The original steel column needs to be completely removed from paint and rust. After reinforcement, the full-section reduction factor is 0.8. At the same time, the thickness of the glue-bonded steel plate is generally no more than 10mm. The welded steel pipe enlarged cross-section method is to weld the newly added steel pipe outside the original steel pipe column, and pour fine stone concrete or grouting material. Although these two solutions are commonly used, they both have obvious shortcomings: (1) The steel bonding method has limited usage scenarios due to the heat resistance limitations of structural adhesives, and there is the possibility of aging and failure. In addition, the structural adhesives are expensive, so The total reinforcement cost is relatively large. (2) Use an outsourcing round steel pipe to enlarge the column section, such as the utility model patent with Chinese Patent Publication No. CN 217205543 U, or use two semi-rectangular steel pipes to enlarge the column section, such as the invention patent with Chinese Patent Publication No. CN 114718341 A. Round steel pipes or semi-rectangular steel pipes Rectangular steel pipes must be cut and shaped at the factory. It is easy to deform during transportation, and the formed steel pipe will rebound and deform. It needs to be corrected at the reinforcement construction site, and it is difficult to restore during splicing. Due to the limited reinforcement construction site, the weight of individual components is large, and the requirements for lifting and hoisting equipment are high. During installation, it is difficult for steel pipe columns to be in place at one time and requires multiple splicing operations. After splicing, it is difficult to ensure the verticality of the steel columns.

Contents of the invention

Purpose of the invention: The present invention provides a kiln tail steel tube concrete column reinforcement device and method that is light in weight, low in installation difficulty, convenient in transportation, safe and reliable.

Technical solution: a steel tube concrete column reinforcement device at the kiln end of the present invention, including a steel tube concrete column to be reinforced, an original beam-column node ring plate, a number of vertical rib plates and a number of non-bending outer sealing plates. The vertical rib plates One side of the vertical edge is fixedly connected to the concrete-filled steel tube column, the other side of the vertical edge is fixedly connected to the original beam-column node ring plate, the outer sealing plate is fixedly connected to two adjacent vertical rib plates, and all vertical rib plates and outer sealing plates are fixedly connected. A closed regular polygon is formed with the concrete-filled steel tube column as the center, and grouting material is injected into the concrete-filled steel tube column and the outer sealing plate.

Furthermore, all vertical ribs and outer sealing plates form a closed regular octagon centered on the concrete-filled steel tube column.

Further, the outer sealing plate is welded and fixed to two adjacent vertical rib plates.

Furthermore, one side of the vertical edge of the vertical rib plate is welded and fixed to the concrete-filled steel tube column, and the other side of the vertical edge is welded and fixed to the original beam-column node ring plate.

Furthermore, a number of pegs are provided in the middle of two adjacent vertical rib plates. The pegs are welded to the concrete-filled steel tube columns, and the pegs are evenly arranged along the height of the column.

Further, the vertical ribs and outer sealing plates are both steel members, the thickness of the vertical ribs is not less than 100mm, the grouting material is non-shrinking high-strength grouting material, and the vertical ribs are fixedly connected to the concrete-filled steel tube columns. Semi-circular holes are evenly opened for the flow of grouting material.

Furthermore, grouting holes are provided on the outer sealing plate.

A method for reinforcing steel tube concrete columns at the kiln end of the present invention includes the following steps:

S1: Design and determine information such as the cross-sectional size of each reinforcement component and the specifications of non-shrinkage high-strength grouting materials;

S2: All components are customized and processed in the factory and transported to the installation site;

S3: Polish the concrete-filled steel tube columns to be reinforced, remove rust, and remove the original coating;

S4: Hoist the vertical rib plates, distribute 8 vertical rib plates evenly along the circumference of the column, place the vertical rib plates on the original beam-column node ring plate, and weld and fix the vertical rib plate with the steel tube concrete column and the original beam-column node ring plate;

S5: Weld studs with uniform column heights in the middle of two adjacent vertical ribs;

S6: Hoist the outer sealing plate, weld the outer sealing plate and vertical ribs;

S7: Use grouting material for grouting, pour it layer by layer from the grouting hole, stop pouring and seal when grout appears.

Further, the S6 also includes the following steps: adopt a reasonable welding sequence for long welds, and use larger clamps to fix the weldment to increase the stiffness of the weldment; take anti-deformation measures, that is, perform welding before welding. During assembly, the weldment is first artificially deformed appropriately in the direction opposite to the deformation after welding to offset the post-welding deformation.

Further, step S8 is included: cleaning the surface of the reinforced device and performing anti-corrosion coating.

Beneficial effects: Compared with the existing technology, the present invention has the following significant advantages: the individual components are low in weight, easy to transport, and difficult to hoist; the individual components have high structural stability and can be assembled in sections to ensure the safety and reliability of construction. , which solves the problems of difficult transportation and on-site correction of conventional components.

Description of drawings

Figure 1 is a plan cross-sectional view of the reinforcement device of the present invention;

Figure 2 is an elevation sectional view of the reinforcement device of the present invention;

Figure 3 is a schematic structural diagram of the outer sealing plate of the present invention;

Figure 4 is a schematic structural diagram of the vertical rib plate of the present invention.

Detailed ways

The technical solution of the present invention will be further described below with reference to the accompanying drawings.

A steel tube concrete column reinforcement device at the kiln end of the present invention, as shown in the figure, includes a steel tube concrete column to be reinforced 1, an original beam-column node ring plate 6, a number of vertical rib plates 2 and a number of non-bending outer sealing plates 4 , one side of the vertical rib plate 2 is welded and fixed to the steel tube column 1, the other side is welded and fixed to the original beam-column node ring plate 6, the outer sealing plate 4 is welded and fixed to the two adjacent vertical rib plates 2 and all vertical The ribs 2 and the outer sealing plates 4 form a closed regular octagon with the concrete-filled steel tube column 1 as the center. The concrete-filled steel tube column 1 and the outer sealing plates 4 are injected with high-strength non-shrinkage grouting material 5. A number of studs 3 are provided in the middle of two adjacent vertical ribs 2. The studs (3) adopt cylindrical head welding (bolt) nails, which comply with the current national standard "Cylinder Head Welding Nails for Arc Stud Welding (GB/T10433)" According to the regulations, the studs 3 are welded to the concrete-filled steel tube column 1, and the studs are evenly arranged along the height of the column. The vertical rib plate 2 and the outer sealing plate 4 are both steel members. The thickness of the vertical rib plate 2 is not less than 100mm. The thickness of the outer sealing plate 4 is designed according to the construction conditions. The grouting material 5 is a non-shrinkage high-strength grouting material. The strength of the grouting material (5) is determined by The core strength of the original concrete-filled steel tube column is one level higher and complies with the current national standard "Technical Specifications for the Application of Cement-based Grouting Materials (GB/T 50448-2015)". Semicircular holes for the flow of grouting materials are evenly opened on the fixed connection side of the vertical rib plate 2 and the concrete-filled steel tube column 1. There are three grouting holes with a diameter of 100mm on the outer sealing plate 4.

A method for reinforcing steel tube concrete columns at the end of a kiln, including the following steps:

S1: Design and determine information such as the cross-sectional size of each reinforcement component and the specifications of non-shrinkage high-strength grouting materials;

S2: All components are customized and processed in the factory and transported to the installation site;

S3: Polish the concrete-filled steel tube column 1 to be reinforced, remove rust, and remove the original coating;

S4: Hoist the vertical ribs 2, distribute 8 vertical ribs 2 evenly along the circumference of the column, place the vertical ribs 2 on the original beam-column node ring plate 6, and connect the vertical ribs 2 with the concrete-filled steel tube column 1 and the original beam-column The node ring plate 6 is welded and fixed;

S5: Weld studs 3 with column heights evenly arranged in the middle position of two adjacent vertical ribs 2;

S6: Lift the outer sealing plate 4, weld the outer sealing plate 4 and the vertical rib plate 2, adopt a reasonable welding sequence for long welds, and use larger clamps to fix the weldment to increase the stiffness of the weldment; adopt anti-deformation The measure is to assemble before welding, and first artificially deform the welded parts in the opposite direction to the deformation after welding to offset the post-welding deformation;

S7: Use grouting material for grouting, pour it layer by layer from the grouting hole, stop pouring and seal when grout appears;

S8: Clean the surface of the reinforced device and apply anti-corrosion coating.

Claims (10)

1. The utility model provides a kiln tail steel core concrete column reinforcing apparatus, includes steel core concrete column (1) and former beam column node annular plate (6) of waiting to consolidate, its characterized in that still includes a plurality of perpendicular floor (2) and a plurality of outside shrouding (4) of buckling, perpendicular limit and steel core concrete column (1) fixed connection on one side of perpendicular floor (2), perpendicular limit and former beam column node annular plate (6) fixed connection on the opposite side, outside shrouding (4) and two adjacent perpendicular floor (2) fixed connection, and all perpendicular floor (2) and outside shrouding (4) enclose into airtight regular polygon with steel core concrete column (1) as the center, steel core concrete column (1) and outside shrouding (4) annotate have grout (5).

2. A kiln tail concrete filled steel tubular column reinforcing device according to claim 1, characterized in that all vertical rib plates (2) and outer side sealing plates (4) are enclosed into a closed regular octagon by taking the concrete filled steel tubular column (1) as the center.

3. A kiln tail concrete filled steel tubular column reinforcing device according to claim 1, wherein the outer sealing plate (4) is welded and fixed with two adjacent vertical rib plates (2).

4. The kiln tail concrete filled steel tube column reinforcing device according to claim 1, wherein one side vertical edge of the vertical rib plate (2) is welded and fixed with the concrete filled steel tube column (1), and the other side vertical edge is welded and fixed with an original beam column node annular plate (6).

5. The kiln tail concrete filled steel tube column reinforcing device according to claim 1, wherein a plurality of pegs (3) are arranged in the middle of two adjacent vertical rib plates (2), the pegs (3) are welded with the concrete filled steel tube column (1), and the pegs are uniformly distributed along the column height.

6. The kiln tail concrete filled steel tube column reinforcing device according to claim 1, wherein the vertical rib plates (2) and the outer side sealing plates (4) are steel members, the thickness of the vertical rib plates (2) is not smaller than 100mm, the grouting material (5) is non-shrinkage high-strength grouting material, and semicircular holes for grouting material flowing are uniformly formed in the fixed connection side of the vertical rib plates (2) and the concrete filled steel tube column (1).

7. A kiln tail concrete filled steel tubular column reinforcing device according to claim 1, wherein grouting holes are formed in the outer sealing plate (4).

8. The method for reinforcing the kiln tail concrete filled steel tube column is characterized by comprising the following steps of:

s1: designing and determining the size of the section of each reinforcing member, the specification of the non-shrinkage high-strength grouting material and other information;

s2: all the components are customized and processed in factories and transported to an installation site;

s3: polishing and derusting the steel tube concrete column (1) to be reinforced, and removing the original coating;

s4: lifting the vertical rib plates (2), uniformly distributing 8 vertical rib plates (2) along the circumference of the column, placing the vertical rib plates (2) on an original beam column node annular plate (6), and welding and fixing the vertical rib plates (2), the steel tube concrete column (1) and the original beam column node annular plate (6);

s5: stud nails (3) with uniformly arranged column heights are welded at the middle positions of two adjacent vertical ribs (2);

s6: hoisting an outer sealing plate (4), and welding the outer sealing plate (4) and the vertical rib plates (2);

s7: pouring by grouting material, pouring layer by layer from the grouting holes, and stopping pouring and sealing after slurry is overflowed.

9. The method for reinforcing a kiln tail concrete filled steel tubular column according to claim 7, wherein said S6 further comprises the steps of: a reasonable welding sequence is adopted for the long welding lines, and simultaneously, a larger clamp is adopted to fix the weldment so as to increase the rigidity of the weldment; and adopting an anti-deformation measure, namely assembling before welding, and manually deforming the weldment in a proper amount in a direction opposite to the deformation generated after welding to counteract the deformation after welding.

10. The method for reinforcing a kiln tail concrete filled steel tubular column according to claim 7, further comprising the step of S8: and cleaning the surface of the device after reinforcement, and carrying out anti-corrosion coating.