Construction method suitable for ultrathin steel skeleton partition wall

Abstract

The invention discloses a construction method suitable for an ultrathin steel skeleton partition wall, which comprises the following steps: manufacturing cold bending moment pipes, and manufacturing partition wall skeleton units by adopting the cold bending moment pipes; the partition wall framework units are sequentially arranged and spliced to form a partition wall framework; a plurality of vertical steel bars are fixedly arranged in the partition wall framework to form a stress framework; the formworks are detachably installed on the two sides of the stress framework, and a closed pouring cavity is formed between the formworks and the stress framework; fine aggregate concrete is poured into the pouring cavity to form a partition wall main body; the partition wall framework is formed by splicing the cold bending moment pipes, and the vertical reinforcing steel bar structure is additionally arranged in the partition wall framework, so that the problems that the wall body is large in thickness, the framework is insufficient in rigidity and concrete is prone to hollowing and cracking can be solved, ultrathin forming of the partition wall is achieved, and the partition wall is combined with steel and concrete to bear force; the comprehensive performance such as strength, sound insulation and fire prevention of the wall body can be improved, formwork erecting and pouring procedures are simplified, and on the basis of guaranteeing the quality and use safety of the wall body, the construction efficiency is improved, and the comprehensive cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of building construction, and in particular to a construction method suitable for ultra-thin steel frame partition walls. Background Technology

[0002] Ultra-thin steel frame partitions, as a new type of lightweight partition wall for dividing interior spaces, can balance wall thinness, structural strength, and sound insulation and fire resistance. Their application in the construction of non-load-bearing interior partition walls in residential buildings is becoming increasingly widespread. Existing interior partition walls are mainly divided into two categories: lightweight steel keel gypsum board partitions and cast-in-place concrete or block partitions. Lightweight steel keel gypsum board partitions are convenient to construct and lightweight, but suffer from lower strength, poor sound insulation and fire resistance, and are prone to cracking and deformation over long-term use. Cast-in-place concrete or block partitions offer high strength, durability, and excellent performance, but their large wall thickness, heavy weight, and long construction period make them unsuitable for efficient use of interior space and rapid construction. Furthermore, they struggle to balance ultra-thin thickness, structural strength, sound insulation and fire resistance, and efficient construction. Therefore, the development of ultra-thin steel frame partition construction technology has been driven.

[0003] Existing ultra-thin steel frame partition walls typically use ordinary light steel keel as the supporting framework, failing to form a structural system where the outer frame and inner core work together to bear the load. This generally results in the following shortcomings: Firstly, the cross-sectional stiffness of ordinary light steel keel is limited, leading to poor overall stability after assembly and difficulty in supporting the pouring of ultra-thin cavity concrete, easily causing problems such as frame deformation and bulging. Secondly, the lack of internal reinforcement structures prevents the steel and concrete from forming a combined load-bearing system, resulting in insufficient crack resistance and impact resistance, making the wall prone to shrinkage cracking and stress cracking later. Thirdly, the narrow space of the ultra-thin cavity makes concrete pouring and vibration difficult, easily leading to insufficient density, hollow areas, and honeycomb-like surface defects. Fourthly, the formwork system is mostly a traditional scattered support and disassembly method, with poor formwork versatility, cumbersome assembly and disassembly, and inability to be reused, resulting in low construction efficiency and high labor costs. Fifthly, after the wall is formed, secondary plastering and leveling are required, involving multiple procedures, a long cycle, and increasing the risk of later cracking.

[0004] Therefore, it is necessary to improve the existing ultra-thin steel frame partition wall construction technology. This can not only solve the problems of large wall thickness, insufficient frame rigidity, easy hollowing and cracking of concrete, and low construction efficiency, but also achieve ultra-thin partition wall forming and combined stress with steel and concrete. It can also improve the overall performance of the wall, such as strength, sound insulation and fire resistance, simplify the formwork and pouring process, reduce wet work and later repairs, improve construction efficiency and reduce overall costs while ensuring wall quality and safety. Summary of the Invention

[0005] In view of the shortcomings of current ultra-thin steel frame partition wall construction technology, the purpose of this invention is to provide a construction method suitable for ultra-thin steel frame partition walls. This method not only solves the problems of large wall thickness, insufficient frame rigidity, easy hollowing and cracking of concrete, and low construction efficiency, but also achieves ultra-thin partition wall forming and combined stress with steel and concrete. Furthermore, it improves the overall performance of the wall, such as strength, sound insulation, and fire resistance, simplifies the formwork and pouring process, reduces wet work and subsequent repairs, and improves construction efficiency and reduces overall costs while ensuring wall quality and safety.

[0006] The present invention provides a construction method for ultra-thin steel frame partition walls, comprising the following steps:

[0007] S1. Fabricate cold-bent rectangular tubes and use them to make partition wall frame units;

[0008] S2. The partition wall frame units are arranged sequentially and assembled to form the partition wall frame;

[0009] S3. Multiple vertical steel bars are fixed inside the partition wall frame to form a load-bearing frame;

[0010] S4. Detachable mounting templates are installed on both sides of the load-bearing frame, and a closed injection cavity is formed between the templates and the load-bearing frame;

[0011] S5. Fine aggregate concrete is poured into the grouting cavity to form the main body of the partition wall.

[0012] Furthermore, in step S1, the cold-bent rectangular tubes are fully welded together to form a partition wall frame unit;

[0013] The cold-bending moment tube includes vertical cold-bending moment tubes and horizontal cold-bending moment tubes. The distance between adjacent vertical cold-bending moment tubes is 350-450mm, and the distance between adjacent horizontal cold-bending moment tubes is 450-550mm.

[0014] Furthermore, in step S2, the partition wall frame units are fully welded together to form a partition wall frame;

[0015] The cross-sectional thickness of the partition wall frame is 35-45mm.

[0016] Furthermore, in step S3, the vertical reinforcing bars are arranged in parallel along the vertical direction of the partition wall frame, and the spacing between adjacent vertical reinforcing bars is 45-55mm;

[0017] The vertical reinforcing bars are fixed to the inner walls of the partition wall frame by full welding.

[0018] Furthermore, after multiple vertical steel bars are fixed inside the partition wall frame to form a load-bearing frame, a switch socket is fixedly installed on the load-bearing frame through a socket box. The thickness of the socket box is less than the cross-sectional thickness of the partition wall frame.

[0019] Furthermore, it also includes step S6, where after the poured fine stone concrete reaches the set strength, the formwork is removed to complete the main body of the partition wall.

[0020] Furthermore, in step S5, the thickness of the partition wall body is 30-50mm.

[0021] Furthermore, fine aggregate concrete is poured into the top section of the grouting cavity, and simultaneously vibrated to compact it during the pouring process.

[0022] The beneficial effects of this invention are as follows: This invention provides a construction method for ultra-thin steel frame partition walls. The method involves assembling the partition wall frame using cold-bent rectangular tubes and adding vertical reinforcing bars inside the frame. This not only solves the problems of large wall thickness, insufficient frame rigidity, easy concrete hollowing and cracking, and low construction efficiency, but also achieves ultra-thin partition wall forming and combined stress distribution with steel and concrete. Furthermore, it improves the overall performance of the wall, including strength, sound insulation, and fire resistance. It simplifies formwork and pouring processes, reduces wet work and subsequent repairs, and improves construction efficiency and reduces overall costs while ensuring wall quality and safety. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0024] Figure 1 This is a schematic diagram of the main structure of the partition wall after the completion of the construction method for ultra-thin steel frame partition walls according to the present invention. Figure I ;

[0025] Figure 2 This is a schematic diagram of the main structure of the partition wall after the construction method applicable to ultra-thin steel frame partition walls is completed. Figure II .

[0026] Reference numerals: 1. Partition wall frame; 101. Partition wall frame unit; 1011. Vertical cold-bent moment tube; 1012. Horizontal cold-bent moment tube; 2. Vertical reinforcement; 3. Formwork; 4. Pouring cavity; 5. Fine aggregate concrete; 6. Socket box; 7. Conduit. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-2 The present invention will be described in further detail below.

[0028] This invention discloses a construction method for ultra-thin steel frame partition walls, comprising the following steps:

[0029] S1. Fabricate cold-bent rectangular tubes to form partition wall frame units 101; fabricate light steel profiles using cold bending technology according to actual construction requirements, precisely cut, bend and assemble the cold-bent rectangular tubes to form standardized partition wall frame units 101, ensuring uniform size and regular structure of partition wall frame units 101, meeting the lightweight and high-strength requirements of ultra-thin partition walls; it can also verify the building base elevation and axis, clean dust or gravel from the base of the partition wall construction area, and ensure that the base is flat and clean;

[0030] S2. The partition wall frame units 101 are arranged in sequence to form a partition wall frame 1; the completed partition wall frame units 101 are arranged vertically in sequence according to the designed spacing, and fixed by bolts, clips or welding to form a continuous partition wall frame 1, ensuring the verticality and flatness of the partition wall frame 1.

[0031] S3. Multiple vertical steel bars 2 are fixedly installed inside the partition wall frame 1 to form a load-bearing frame; multiple vertical steel bars 2 are evenly distributed along the height direction inside the partition wall frame 1, and the vertical steel bars 2 are reliably tied or welded to the partition wall frame 1 to form an integral load-bearing frame, thereby improving the crack resistance, compression resistance and impact resistance of the partition wall.

[0032] S4. Detachable templates 3 are installed on both sides of the load-bearing frame, forming a closed grouting cavity 4 between the templates 3 and the load-bearing frame; templates 3 are symmetrically installed on both sides of the load-bearing frame and fixed by means of clamps or tie rods, etc. The templates 3 are tightly spliced ​​and form a closed and uniform grouting cavity 4 between them and the load-bearing frame, which facilitates concrete pouring and makes subsequent demolding convenient.

[0033] S5. Fine aggregate concrete 5 is poured into the grouting cavity 4 to form the main body of the partition wall. Generally, the fine aggregate concrete 5 is poured into the grouting cavity 4 in layers using a vibration method to ensure that the cavity is filled densely and without voids. After curing to the design strength, the formwork 3 is removed to form a solid and smooth ultra-thin steel frame concrete partition wall. Other finishing work can be carried out directly on the surface of the partition wall without additional plastering. If there are special finishing requirements, subsequent construction can be carried out with the assistance of wall-stabilizing materials. The integrated molding of the ultra-thin partition wall is achieved through cold bending forming, frame assembly, steel reinforcement, formwork and concrete pouring, which will not be described in detail here.

[0034] In this embodiment, in step S1, the cold-bent moment tubes are fully welded together to form a partition wall frame unit 101. The cold-bent moment tubes include vertical cold-bent moment tubes 1011 and horizontal cold-bent moment tubes 1012. The spacing between adjacent vertical cold-bent moment tubes 1011 is 350-450mm, and the spacing between adjacent horizontal cold-bent moment tubes 1012 is 450-550mm. The partition wall frame unit 101 is formed by fully welding cold-bent moment tubes, resulting in stronger overall rigidity and structural stability. The cold-bent moment tubes, including vertical cold-bent moment tubes 1011 and horizontal cold-bent moment tubes 1012, are all cold-bent using specialized equipment, resulting in regular cross-sections and high dimensional accuracy, meeting the requirements for lightweight and high-strength ultra-thin partition walls. During assembly, the vertical cold-bent moment tubes 1011 and horizontal cold-bent moment tubes 1012 are aligned according to the design position, and all joint nodes are welded using a full welding process. The welds are continuous and uniform, without any incomplete or missing welds, forming an integrated rigid frame of horizontal and vertical pipes, preventing deformation or cracking under stress later. The vertical cold-bent moment pipes 1011 are evenly arranged at intervals of 350–450 mm to ensure uniform vertical load-bearing capacity and meet the requirements for vertical force and surface fixation of the partition wall. The horizontal cold-bent moment pipes 1012 are horizontally arranged at intervals of 450–550 mm to form a stable grid with the vertical pipes, improving the frame's resistance to lateral forces and deformation. After welding, the welds are ground and rust-proofed to ensure that the partition wall frame units 101 are consistent in size, and that verticality and flatness meet the standards, allowing for mass prefabrication and facilitating rapid assembly into the overall partition wall frame 1. Preferably, the spacing between adjacent vertical cold-bent moment pipes 1011 is 400 mm, and the spacing between adjacent horizontal cold-bent moment pipes 1012 is 500 mm, which will not be elaborated further here.

[0035] In this embodiment, in step S2, the partition wall frame units 101 are fully welded together to form the partition wall frame 1; the cross-sectional thickness of the partition wall frame 1 is 35-45mm, and the partition wall frame 1 is assembled using a full welding process to ensure the overall rigidity and structural integrity of the partition wall frame 1, and to meet the structural safety requirements of ultra-thin partition walls. Before assembly, each partition wall frame unit 101 is positioned and calibrated to ensure that the verticality and flatness of each unit meet the design standards, and that the mating surfaces of adjacent units are tightly fitted without gaps to avoid splicing deviations affecting subsequent construction and the overall performance of the partition wall. After positioning, the mating joints of adjacent partition wall frame units 101 are welded using a full welding process, with continuous and full welds, so that all partition wall frame units 101 are firmly connected into one, forming a continuous and complete partition wall frame 1. This effectively improves the frame's resistance to lateral displacement and deformation, preventing problems such as loosening or cracking during later use. At the same time, the cross-sectional thickness of the partition wall frame 1 is strictly controlled within the range of 35-45mm, taking into account both ultra-thin characteristics and load-bearing capacity. This not only meets the need for saving indoor space, but also ensures the overall strength of the partition wall through the synergistic effect of the frame structure and the subsequent fine stone concrete pouring. It is suitable for various ultra-thin partition wall construction scenarios and facilitates subsequent formwork installation and concrete pouring operations. Preferably, the cross-sectional thickness of the partition wall frame 1 is 40mm, which will not be elaborated further here.

[0036] In this embodiment, in step S3, the vertical reinforcing bars 2 are arranged in parallel along the vertical direction of the partition wall frame 1, and the spacing between adjacent vertical reinforcing bars 2 is 45-55mm. The vertical reinforcing bars 2 are fixed to the inner wall of the partition wall frame 1 by full welding. The vertical reinforcing bars 2 are arranged vertically in parallel along the height direction of the partition wall frame 1, serving as the core load-bearing main reinforcement. The spacing between adjacent vertical reinforcing bars 2 is strictly controlled within a reasonable range of 45-55mm. This density can ensure the reinforcement ratio per unit area and meet the shear and bending resistance requirements of the ultra-thin partition wall. To meet load-bearing requirements while avoiding problems such as insufficient concrete filling and construction difficulties caused by excessive steel reinforcement, multiple steel bars are in full contact with the inner wall of the partition wall frame 1 in the vertical direction, forming a multi-point support force system, which can effectively balance the lateral pressure and vertical load of the partition wall during use. In terms of installation and fixing method, the vertical steel bars 2 and the horizontal and vertical cold bending moment tubes of the partition wall frame 1 are all welded together using a full welding process. During welding, it is ensured that the weld is full and continuous, so that the steel bars and the metal frame are firmly fused together to form a rigid and integral load-bearing structure. This welding fixing method can effectively transfer the stress between the reinforcing bars and the skeleton, prevent the reinforcing bars from slipping, and avoid potential problems such as loosening of the reinforcing bars or separation of structural layers when the partition wall is under stress and deformation. The internal load-bearing skeleton formed by this step, together with the outer partition wall skeleton, forms a double-insurance structure, which greatly enhances the partition wall's earthquake resistance, impact resistance, and deformation resistance, and provides a stable reinforcing cage support for subsequent concrete pouring, ensuring that the final ultra-thin steel skeleton partition wall has excellent long-term durability and structural safety. The vertical reinforcing bars 2 can be Ф4 steel bars. Preferably, the spacing between adjacent vertical reinforcing bars 2 is 50mm, which will not be elaborated here.

[0037] In this embodiment, after multiple vertical steel bars 2 are fixed inside the partition wall frame 1 to form a load-bearing frame, a switch socket is fixedly installed on the load-bearing frame via a socket box 6. The thickness of the socket box 6 is less than the cross-sectional thickness of the partition wall frame 1. After the vertical steel bars 2 are fixed and the load-bearing frame is formed in step S3, the pre-installation of the switch socket is carried out simultaneously to ensure that the switch socket is firmly installed and adapted to the ultra-thin partition wall structure, avoiding damage to the integrity of the wall during later wall chiseling. Before installation, the installation position and height of the switch socket are determined according to the design drawings. Based on the arrangement spacing of the vertical steel bars 2, the installation points are marked to avoid the positions of the steel bars, preventing damage to the load-bearing frame during installation. The socket is fixedly installed through a dedicated socket box 6. The socket box 6 is made of flame-retardant, high-strength plastic or thin steel plate, and its thickness is strictly controlled to be less than the cross-sectional thickness of the partition wall frame 1. This ensures that the box is completely embedded inside the partition wall frame 1 and does not protrude from the surface of the frame. This avoids taking up extra space and prevents interference during subsequent template installation, ensuring the sealing of the grouting cavity 4. During installation, the socket box 6 is precisely positioned at the preset point, and the box is firmly connected to the vertical steel bars 2 of the load-bearing frame and the cold-bent moment tube of the partition wall frame 1 by welding or special fasteners. This ensures that the box is installed flat and without looseness, and that the internal wiring holes are oriented in a reasonable manner to facilitate subsequent wiring operations. After fixing, a simple sealing treatment is applied around the base box to prevent concrete slurry from seeping into the base box and causing blockage during subsequent pouring of fine stone concrete. This installation method allows the pre-installation of switches and sockets to be carried out simultaneously with the frame construction, simplifying the construction process and avoiding damage to the wall structure during secondary construction. At the same time, the firm connection between the socket base box and the frame ensures the long-term stability of the switches and sockets, adapting to the structural characteristics and usage requirements of ultra-thin steel frame partition walls. Of course, it also includes the conduit 7 connected to the switches and sockets, with one end of the conduit 7 located in the socket base box 6.

[0038] In this embodiment, step S6 is also included: after the fine stone concrete 5 reaches the set strength, the formwork 3 is removed to complete the main body of the partition wall. Step S6 is the process of removing the formwork 3 and forming the main body of the partition wall. The core is to properly remove the formwork 3 after the fine stone concrete 5 reaches the designed set strength, and finally complete the main body of the partition wall. Before removing the formwork, the strength of the fine stone concrete needs to be tested to ensure that it reaches more than 70% of the design strength, so as to avoid cracking or deformation of the wall due to insufficient strength. During the dismantling process, the principle of "supporting before dismantling" and "supporting first, dismantling later" is followed. Non-load-bearing formwork is removed first, followed by load-bearing formwork. Care is taken to handle the formwork gently throughout to avoid collisions with the wall and prevent damage to the concrete structure. After the formwork is removed, any residual concrete on the surface is cleaned promptly for reuse. Simultaneously, the partition wall surface is repaired, addressing joints, burrs, and other imperfections. This step ensures the integrity and surface smoothness of the partition wall structure and simplifies the construction process by simultaneously removing the formwork and repairing the wall, meeting the needs of efficient construction of ultra-thin steel frame partition walls and ensuring that the final partition wall meets structural safety and usage requirements. The formwork 3 can be a quick-release wooden formwork. The fine aggregate concrete 5 can be C20 fine aggregate concrete with an aggregate particle size not exceeding 10mm and a slump of 160-200mm.

[0039] In this embodiment, in step S5, the thickness of the partition wall body is 30-50mm. This thickness range is specifically designed for ultra-thin partition walls, achieving lightweight construction and space saving while ensuring structural strength. When pouring fine stone concrete 5, the limiting positioning of the template 3 and the vibration process ensure that the thickness of the partition wall body is uniform, avoiding stress deviation and surface cracking caused by uneven thickness in some areas. The ultra-thin thickness of 30-50mm, combined with the dual stress system composed of the inner cold-bent moment tube skeleton and vertical steel bars, gives the partition wall excellent compressive strength, impact resistance, and crack resistance. This thickness design is suitable for compact building renovations or fine decoration projects, effectively increasing the actual usable indoor area while taking into account construction convenience and wall durability. Preferably, the thickness of the partition wall body is 40mm, which will not be elaborated here.

[0040] In this embodiment, fine aggregate concrete 5 is poured into the top of the grouting cavity 4 in sections, and simultaneously vibrated to compact it during the pouring process. This sectional pouring method, adapted to the grouting cavity structure of the ultra-thin partition wall, is adopted. The pouring is done in sections of 300-500mm in height, poured slowly to avoid insufficient compaction of the cavity, air bubbles, or grout overflow caused by rapid concrete pouring. During the pouring of each section of concrete, a micro-vibrator is simultaneously inserted into the cavity to compact it. During vibration, contact with the vertical reinforcing bars 2, the partition wall frame 1, and the socket box 6 is avoided to prevent structural displacement or damage. Vibration continues until no air bubbles appear on the concrete surface and cement slurry is present, ensuring that there are no voids or honeycomb pits inside the grouting cavity 4. This method ensures a tight bond between the concrete and the frame and reinforcing bars, and combined with the advantage of pre-installed switches and sockets, further improves the overall quality and stability of the partition wall.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A construction method suitable for ultra-thin steel frame partition walls, characterized in that, Includes the following steps: S1. Fabricate cold-bent rectangular tubes and use them to make partition wall frame units; S2. The partition wall frame units are arranged sequentially and assembled to form the partition wall frame; S3. Multiple vertical steel bars are fixed inside the partition wall frame to form a load-bearing frame; S4. Detachable mounting templates are installed on both sides of the load-bearing frame, and a closed injection cavity is formed between the templates and the load-bearing frame; S5. Fine aggregate concrete is poured into the grouting cavity to form the main body of the partition wall.

2. The construction method for ultra-thin steel frame partition walls according to claim 1, characterized in that: In step S1, the cold-bent rectangular tubes are fully welded together to form a partition wall frame unit; The cold-bending moment tube includes vertical cold-bending moment tubes and horizontal cold-bending moment tubes. The distance between adjacent vertical cold-bending moment tubes is 350-450mm, and the distance between adjacent horizontal cold-bending moment tubes is 450-550mm.

3. The construction method for ultra-thin steel frame partition walls according to claim 1, characterized in that: In step S2, the partition wall frame units are fully welded together to form a partition wall frame; The cross-sectional thickness of the partition wall frame is 35-45mm.

4. The construction method for ultra-thin steel frame partition walls according to claim 1, characterized in that: In step S3, the vertical reinforcing bars are arranged in parallel along the vertical direction of the partition wall frame, and the spacing between adjacent vertical reinforcing bars is 45-55mm. The vertical reinforcing bars are fixed to the inner walls of the partition wall frame by full welding.

5. The construction method for ultra-thin steel frame partition walls according to claim 4, characterized in that: After multiple vertical steel bars are fixed inside the partition wall frame to form a load-bearing frame, a switch socket is fixedly installed on the load-bearing frame through a socket box. The thickness of the socket box is less than the cross-sectional thickness of the partition wall frame.

6. The construction method for ultra-thin steel frame partition walls according to claim 1, characterized in that: It also includes step S6, where the formwork is removed after the fine stone concrete reaches the set strength, thus completing the main body of the partition wall.

7. The construction method for ultra-thin steel frame partition walls according to claim 1, characterized in that: In step S5, the thickness of the partition wall body is 30-50mm.

8. The construction method for ultra-thin steel frame partition walls according to claim 7, characterized in that: Fine aggregate concrete is poured into the top section of the grouting cavity and simultaneously vibrated to compact it during the pouring process.

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