Steel-encased technology for reinforcing structural column

Abstract

The invention relates to the technical field of building structure reinforcement, and discloses a structural column reinforcement steel encasing process which comprises the following steps: S1, construction preparation; s2, a profile steel framework is manufactured; s3, cleaning a base layer; s4, mounting and welding a profile steel framework; s5, anchoring angle steel hoops are installed; s6, mortar is plugged and filled; step S7, plastering the profile steel protective layer with mortar; step S8, maintaining; step S9, checking and accepting; according to the technology, the construction process is optimized, unnecessary construction links are reduced, the construction efficiency is improved, and construction is convenient and fast; through strict construction steps and quality control standards, the reliability of the reinforcing effect is ensured, and the quality is reliable; the high-strength shrinkage-free grouting material and reasonable material consumption are adopted, so that the construction cost is reduced, meanwhile, the bearing capacity of the structural column is improved, and the structure column is economical and efficient; and the method is suitable for reinforcing projects of various types of concrete structural columns, and has wide applicability and strong applicability.

Description

Technical Field

[0001] The invention belongs to the technical field of building structure reinforcement, in particular to a process for reinforcing structural columns with external steel cladding. Background Art

[0002] In the renovation or reinforcement projects of existing buildings, insufficient bearing capacity of structural columns is a common problem. Traditional reinforcement methods, such as increasing the cross-section or pasting carbon fiber cloth, have problems such as complex construction, large damage to the original structure, or limited reinforcement effect. As an effective reinforcement method, the external steel reinforcement method increases the bearing capacity of the structural column by adding steel components to the outside of the structural column. It has the advantages of simple construction and little impact on the original structure. However, the existing external steel reinforcement process still has some shortcomings, such as insufficient optimization of the construction process and incomplete quality control standards. Therefore, it is of great practical significance to develop a more efficient, reliable and easy-to-operate external steel reinforcement process for structural columns.

[0003] Based on this, a structural column reinforcement steel cladding process was designed. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a structural column reinforcement outer steel cladding process, which effectively solves the problems raised in the above background.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a structural column reinforcement and outer steel cladding process, comprising the following steps:

[0006] Step S1: Construction preparation

[0007] S1.1 Technical Preparation:

[0008] Prepare detailed special construction plans, clarifying the construction process, technical requirements and quality standards;

[0009] Provide pre-job training to construction personnel, including technical briefing and safety education, to ensure that they are familiar with construction techniques and operating specifications;

[0010] S1.2 Site Preparation:

[0011] Clean the reinforcement area to ensure that the construction site is flat and clean to facilitate construction operations;

[0012] Remove most of the live load on the upper layers of the structural columns that need to be reinforced to reduce additional stress during construction;

[0013] S1.3. Material preparation:

[0014] Select angle steel, flat steel, bolts, welding rods, high-strength non-shrinkage grouting materials, wire mesh, and film materials that meet the design requirements;

[0015] Conduct secondary inspection on incoming steel to ensure that its variety, specification, performance and size meet the design requirements;

[0016] Reasonably arrange the time and quantity of material delivery according to the construction plan to avoid material backlog or shortage;

[0017] S1.4. Equipment preparation:

[0018] Prepare all necessary construction tools, including but not limited to electric welders, cutters, electric drills, bench drills, mixers, grinders, step-by-step tighteners, spirit levels, and scrapers;

[0019] Carry out comprehensive inspection and maintenance of construction machinery and tools to ensure their good performance and normal use;

[0020] Equipped with necessary safety equipment, including but not limited to gloves, hard hats, dust masks, and safety belts to ensure construction safety;

[0021] Step S2: Making a steel frame

[0022] S2.1, Angle steel cutting:

[0023] Calculate the required angle steel length based on the net height of the on-site floor, and use a cutting machine to accurately cut the angle steel according to the calculated value;

[0024] S2.2, Flat steel and angle steel hoop cutting:

[0025] Calculate the required lengths of flat steel and steel bars based on the angle steel spacing around the column and the lap length required for welding the tie plates and angle steel hoops, and cut the flat steel, steel bars and angle steel hoops according to the calculated values;

[0026] Step S3: Cleaning the base layer

[0027] S3.1. Removal of the decoration layer:

[0028] Remove the finishing layer on the concrete structural columns to ensure that there is no debris, oil stains or loose objects on the concrete surface;

[0029] S3.2, Surface treatment:

[0030] Use a grinder to grind the surface of the concrete column to make it smooth and clean so that the angle steel can fit closely to the column surface;

[0031] Step S4: Installation and welding of steel frame

[0032] S4.1. Install the angle steel around the perimeter:

[0033] Use step-by-step tightening to temporarily fix the angle steel at the four corners of the column, ensuring that the angle steel is close to the column surface and the verticality meets the requirements;

[0034] S4.2. Install the gusset plate:

[0035] Mark the fixed position of the gusset plate by marking the angle steel around the column according to the design requirements;

[0036] Connect the gusset plate and angle steel with fillet welding, and use three-sided welding at the overlap part, with the overlap length ≥40mm to ensure the welding quality;

[0037] S4.3, welding quality inspection:

[0038] Perform visual inspection on the welding parts to ensure that the welds are full, free of cracks and undercut defects;

[0039] Step S5: Install the anchor angle steel hoop

[0040] S5.1、Angle steel hoop opening:

[0041] Use a bench drill to drill a bolt hole at 1 / 3 of the distance on both sides of the angle steel. The hole diameter should be 1 to 2 mm larger than the bolt diameter.

[0042] S5.2, Positioning and opening:

[0043] Draw lines around the top and bottom of the column to mark the installation positions of the angle steel hoops and the locations of the bolt holes, and drill the holes with an electric drill.

[0044] S5.3, fixed angle steel hoop:

[0045] Place the angle steel hoop close to the angle steel outside the column and secure it firmly with bolts;

[0046] S5.4, connection welding:

[0047] Connect the gusset plate and angle steel by fillet welding, and use three-sided welding at the overlap part, with the overlap length ≥40mm;

[0048] Step S6: Filling with mortar

[0049] S6.1. Mortar preparation:

[0050] Use XQ-60 high-strength non-shrinkage grouting material to make grouting mortar according to the mix ratio;

[0051] S6.2, caulking construction:

[0052] Fill the gap between the concrete column and the steel frame with the prepared mortar. Make sure the gap is dense and without gaps, and ensure that the steel frame and the concrete column are tightly combined.

[0053] Step S7: Mortar painting of steel protective layer

[0054] S7.1. Wire Mesh Installation:

[0055] Install the wire mesh on the steel section surface and concrete surface, ensuring that the wire mesh fits tightly against the steel section skeleton and concrete column surface;

[0056] S7.2, Mortar painting:

[0057] Use XQ-60 high-strength non-shrinkage grouting material to make the covering mortar according to the mix ratio;

[0058] Paint the cylinder surface with a thickness of no less than 20mm, ensuring that the paint layer is even and smooth without any gaps or cracks;

[0059] Step S8: Maintenance

[0060] S8.1. Film covering:

[0061] Use film to wrap and seal the cylindrical surface, ensuring that the film covers the entire surface without any dead corners to prevent moisture evaporation;

[0062] S8.2, Maintenance and Management:

[0063] The film must not be damaged during the curing period. If the film is found to be damaged, the damaged part should be re-covered in time;

[0064] According to the ambient temperature and humidity conditions, reasonably control the curing time to ensure that the mortar is fully hardened;

[0065] Step S9: Acceptance

[0066] S9.1. Material acceptance:

[0067] Check the quality certification documents and acceptance procedures of incoming materials to ensure that secondary inspection reports for steel sections, rebars and other materials are complete and that the inspection batches meet the specification requirements;

[0068] S9.2, Welding Acceptance:

[0069] Check the physical inspection report of steel welding seams to ensure that the inspection batch meets the design and specification requirements and the weld quality meets the third-level weld standard;

[0070] S9.3, Concealed Works Acceptance:

[0071] Check the acceptance records of concealed works to ensure that the records are complete and that the concealed works have passed the acceptance inspection;

[0072] S9.4, Appearance Quality Acceptance:

[0073] Check whether the outer sealing of the steel section is complete, whether the thickness of the mortar coating meets the design requirements, whether the surface is smooth and neat, without delamination or hollowing, the verticality deviation of the facade is ≤3mm, the flatness deviation of the plane is ≤3mm, and the squareness deviation of the inside and outside corners is ≤3mm;

[0074] S9.5. Dimensional Acceptance:

[0075] Check the overall dimensions of the completed structural columns to ensure a dimensional deviation of ±5mm.

[0076] Compared with the prior art, the present invention has the following beneficial effects:

[0077] 1. This technology optimizes the construction process, reduces unnecessary construction links, improves construction efficiency, and facilitates construction;

[0078] 2. Through strict construction steps and quality control standards, the reliability of the reinforcement effect and reliable quality are ensured;

[0079] 3. The use of high-strength non-shrinkage grouting materials and reasonable material usage reduces construction costs and improves the bearing capacity of structural columns, making it economical and efficient;

[0080] 4. It is suitable for various types of concrete structure column reinforcement projects, with wide applicability and strong applicability; BRIEF DESCRIPTION OF THE DRAWINGS

[0081] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0082] In the attached figure:

[0083] Figure 1 It is a schematic diagram of the process of the present invention;

[0084] Figure 2 It is a construction schematic diagram of the present invention;

[0085] In the figure: 1. Angle steel; 2. Tie plate; 3. Concrete column. DETAILED DESCRIPTION

[0086] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0087] See also Figure 1 and Figure 2 The present invention provides a structural column reinforcement outer steel cladding process, comprising the following steps:

[0088] Step S1: Construction preparation

[0089] S1.1 Technical Preparation:

[0090] Prepare detailed special construction plans, clarifying the construction process, technical requirements and quality standards;

[0091] Provide pre-job training to construction personnel, including technical briefing and safety education, to ensure that they are familiar with construction techniques and operating specifications;

[0092] S1.2 Site Preparation:

[0093] Clean the reinforcement area to ensure that the construction site is flat and clean to facilitate construction operations;

[0094] Remove most of the live load on the upper layers of the structural columns that need to be reinforced to reduce additional stress during construction;

[0095] S1.3. Material preparation:

[0096] Select angle steel, flat steel, bolts, welding rods, high-strength non-shrinkage grouting materials, wire mesh, and film materials that meet the design requirements;

[0097] Conduct secondary inspection on incoming steel to ensure that its variety, specification, performance and size meet the design requirements;

[0098] Reasonably arrange the time and quantity of material delivery according to the construction plan to avoid material backlog or shortage;

[0099] S1.4. Equipment preparation:

[0100] Prepare all necessary construction tools, including but not limited to electric welders, cutters, electric drills, bench drills, mixers, grinders, step-by-step tighteners, spirit levels, and scrapers;

[0101] Carry out comprehensive inspection and maintenance of construction machinery and tools to ensure their good performance and normal use;

[0102] Equipped with necessary safety equipment, including but not limited to gloves, hard hats, dust masks, and safety belts to ensure construction safety;

[0103] Step S2: Making a steel frame

[0104] S2.1, Angle steel cutting:

[0105] Calculate the required angle steel length based on the net height of the on-site floor, and use a cutting machine to accurately cut the angle steel according to the calculated value;

[0106] S2.2, Flat steel and angle steel hoop cutting:

[0107] Calculate the required lengths of flat steel and steel bars based on the angle steel spacing around the column and the lap length required for welding the tie plates and angle steel hoops, and cut the flat steel, steel bars and angle steel hoops according to the calculated values;

[0108] Step S3: Cleaning the base layer

[0109] S3.1. Removal of the decoration layer:

[0110] Remove the finishing layer on the concrete structural columns to ensure that there is no debris, oil stains or loose objects on the concrete surface;

[0111] S3.2, Surface treatment:

[0112] Use a grinder to grind the surface of the concrete column to make it smooth and clean so that the angle steel can fit closely to the column surface;

[0113] Step S4: Installation and welding of steel frame

[0114] S4.1. Install the angle steel around the perimeter:

[0115] Use step-by-step tightening to temporarily fix the angle steel at the four corners of the column, ensuring that the angle steel is close to the column surface and the verticality meets the requirements;

[0116] S4.2. Install the gusset plate:

[0117] Mark the fixed position of the gusset plate by marking the angle steel around the column according to the design requirements;

[0118] Connect the gusset plate and angle steel with fillet welding, and use three-sided welding at the overlap part, with the overlap length ≥40mm to ensure the welding quality;

[0119] S4.3, welding quality inspection:

[0120] Perform visual inspection on the welding parts to ensure that the welds are full, free of cracks and undercut defects;

[0121] Step S5: Install the anchor angle steel hoop

[0122] S5.1、Angle steel hoop opening:

[0123] Use a bench drill to drill a bolt hole at 1 / 3 of the distance on both sides of the angle steel. The hole diameter should be 1 to 2 mm larger than the bolt diameter.

[0124] S5.2, Positioning and opening:

[0125] Draw lines around the top and bottom of the column to mark the installation positions of the angle steel hoops and the locations of the bolt holes, and drill the holes with an electric drill.

[0126] S5.3, fixed angle steel hoop:

[0127] Place the angle steel hoop close to the angle steel outside the column and secure it firmly with bolts;

[0128] S5.4, connection welding:

[0129] Connect the gusset plate and angle steel by fillet welding, and use three-sided welding at the overlap part, with the overlap length ≥40mm;

[0130] Step S6: Filling with mortar

[0131] S6.1. Mortar preparation:

[0132] Use XQ-60 high-strength non-shrinkage grouting material to make grouting mortar according to the mix ratio;

[0133] S6.2, caulking construction:

[0134] Fill the gap between the concrete column and the steel frame with the prepared mortar. Make sure the gap is dense and without gaps, and ensure that the steel frame and the concrete column are tightly combined.

[0135] Step S7: Mortar painting of steel protective layer

[0136] S7.1. Wire Mesh Installation:

[0137] Install the wire mesh on the steel section surface and concrete surface, ensuring that the wire mesh fits tightly against the steel section skeleton and concrete column surface;

[0138] S7.2, Mortar painting:

[0139] Use XQ-60 high-strength non-shrinkage grouting material to make the covering mortar according to the mix ratio;

[0140] Paint the cylinder surface with a thickness of no less than 20mm, ensuring that the paint layer is even and smooth without any gaps or cracks;

[0141] Step S8: Maintenance

[0142] S8.1. Film covering:

[0143] Use film to wrap and seal the cylindrical surface, ensuring that the film covers the entire surface without any dead corners to prevent moisture evaporation;

[0144] S8.2, Maintenance and Management:

[0145] The film must not be damaged during the curing period. If the film is found to be damaged, the damaged part should be re-covered in time;

[0146] According to the ambient temperature and humidity conditions, reasonably control the curing time to ensure that the mortar is fully hardened;

[0147] Step S9: Acceptance

[0148] S9.1. Material acceptance:

[0149] Check the quality certification documents and acceptance procedures of incoming materials to ensure that secondary inspection reports for steel sections, rebars and other materials are complete and that the inspection batches meet the specification requirements;

[0150] S9.2, Welding Acceptance:

[0151] Check the physical inspection report of steel welding seams to ensure that the inspection batch meets the design and specification requirements and the weld quality meets the third-level weld standard;

[0152] S9.3, Concealed Works Acceptance:

[0153] Check the acceptance records of concealed works to ensure that the records are complete and that the concealed works have passed the acceptance inspection;

[0154] S9.4, Appearance Quality Acceptance:

[0155] Check whether the outer sealing of the steel section is complete, whether the thickness of the mortar coating meets the design requirements, whether the surface is smooth and neat, without delamination or hollowing, the verticality deviation of the facade is ≤3mm, the flatness deviation of the plane is ≤3mm, and the squareness deviation of the inside and outside corners is ≤3mm;

[0156] S9.5. Dimensional Acceptance:

[0157] Check the overall dimensions of the completed structural columns to ensure a dimensional deviation of ±5mm.

[0158] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0159] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. Structural column reinforcement outsourcing steel process, characterized by: The following steps are involved: Step S1: Construction preparation S1.1 Technical Preparation: Prepare detailed special construction plans, clarifying the construction process, technical requirements and quality standards; Provide pre-job training to construction personnel, including technical briefing and safety education, to ensure that they are familiar with construction techniques and operating specifications; S1.2 Site Preparation: Clean the reinforcement area to ensure that the construction site is flat and clean to facilitate construction operations; Remove most of the live load on the upper layers of the structural columns that need to be reinforced to reduce additional stress during construction; S1.

3. Material preparation: Select angle steel, flat steel, bolts, welding rods, high-strength non-shrinkage grouting materials, wire mesh, and film materials that meet the design requirements; Conduct secondary inspection on incoming steel to ensure that its variety, specification, performance and size meet the design requirements; Reasonably arrange the time and quantity of material delivery according to the construction plan to avoid material backlog or shortage; S1.

4. Equipment preparation: Prepare all necessary construction tools, including but not limited to electric welders, cutters, electric drills, bench drills, mixers, grinders, step-by-step tighteners, spirit levels, and scrapers; Carry out comprehensive inspection and maintenance of construction machinery and tools to ensure their good performance and normal use; Equipped with necessary safety equipment, including but not limited to gloves, hard hats, dust masks, and safety belts to ensure construction safety; Step S2: Making a steel frame S2.1, Angle steel cutting: Calculate the required angle steel length based on the net height of the on-site floor, and use a cutting machine to accurately cut the angle steel according to the calculated value; S2.2, Flat steel and angle steel hoop cutting: Calculate the required lengths of flat steel and steel bars based on the angle steel spacing around the column and the lap length required for welding the tie plates and angle steel hoops, and cut the flat steel, steel bars and angle steel hoops according to the calculated values; Step S3: Cleaning the base layer S3.

1. Removal of the decoration layer: Remove the finishing layer on the concrete structural columns to ensure that there is no debris, oil stains or loose objects on the concrete surface; S3.2, Surface treatment: Use a grinder to grind the surface of the concrete column to make it smooth and clean so that the angle steel can fit closely to the column surface; Step S4: Installation and welding of steel frame S4.

1. Install the angle steel around the perimeter: Use step-by-step tightening to temporarily fix the angle steel at the four corners of the column, ensuring that the angle steel is close to the column surface and the verticality meets the requirements; S4.

2. Install the gusset plate: Mark the fixed position of the gusset plate by marking the angle steel around the column according to the design requirements; Connect the gusset plate and angle steel with fillet welding, and use three-sided welding at the overlap part, with the overlap length ≥40mm to ensure the welding quality; S4.3, welding quality inspection: Perform visual inspection on the welding parts to ensure that the welds are full, free of cracks and undercut defects; Step S5: Install anchor angle steel hoop S5.1、Angle steel hoop opening: Use a bench drill to drill a bolt hole at 1 / 3 of the distance on both sides of the angle steel. The hole diameter should be 1 to 2 mm larger than the bolt diameter. S5.2, Positioning and opening: Draw lines around the top and bottom of the column to mark the installation positions of the angle steel hoops and the locations of the bolt holes, and drill the holes with an electric drill. S5.3, fixed angle steel hoop: Place the angle steel hoop close to the angle steel outside the column and secure it firmly with bolts; S5.4, connection welding: Connect the gusset plate and angle steel by fillet welding, and use three-sided welding at the overlap part, with the overlap length ≥40mm; Step S6: Filling with mortar S6.

1. Mortar preparation: Use XQ-60 high-strength non-shrinkage grouting material to make grouting mortar according to the mix ratio; S6.2, caulking construction: Fill the gap between the concrete column and the steel frame with the prepared mortar. Make sure the gap is dense and without gaps, and ensure that the steel frame and the concrete column are tightly combined. Step S7: Mortar painting of steel protective layer S7.

1. Wire Mesh Installation: Install the wire mesh on the steel section surface and concrete surface, ensuring that the wire mesh fits tightly against the steel section skeleton and concrete column surface; S7.2 Mortar painting: Use XQ-60 high-strength non-shrinkage grouting material to make the covering mortar according to the mix ratio; Paint the cylinder surface with a thickness of no less than 20mm, ensuring that the paint layer is even and smooth without any gaps or cracks; Step S8: Maintenance S8.

1. Film covering: Use film to wrap and seal the cylindrical surface, ensuring that the film covers the entire surface without any dead corners to prevent moisture evaporation; S8.2, Maintenance and Management: The film must not be damaged during the curing period. If the film is found to be damaged, the damaged part should be re-covered in time; According to the ambient temperature and humidity conditions, reasonably control the curing time to ensure that the mortar is fully hardened; Step S9: Acceptance S9.

1. Material acceptance: Check the quality certification documents and acceptance procedures of incoming materials to ensure that secondary inspection reports for steel sections, rebars and other materials are complete and that the inspection batches meet the specification requirements; S9.2, Welding Acceptance: Check the physical inspection report of steel welding seams to ensure that the inspection batch meets the design and specification requirements and the weld quality meets the third-level weld standard; S9.3, Concealed Works Acceptance: Check the acceptance records of concealed works to ensure that the records are complete and that the concealed works have passed the acceptance inspection; S9.4, Appearance Quality Acceptance: Check whether the outer sealing of the steel section is complete, whether the thickness of the mortar coating meets the design requirements, whether the surface is smooth and neat, without delamination or hollowing, the vertical deviation of the facade is ≤3mm, the flatness deviation of the plane is ≤3mm, and the squareness deviation of the inside and outside corners is ≤3mm; S9.

5. Dimensional Acceptance: Check the overall dimensions of the completed structural columns to ensure a dimensional deviation of ±5mm.

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