Novel filler wall tie bar glue-free post-embedded part construction structure

Abstract

The utility model discloses a novel filler wall tie bar glue-free post-embedded part construction structure, and relates to a building filler wall tie bar structure replacing embedded bars. Comprising an infilled wall body (1) and a rear embedded part tie bar assembly arranged at a bar planting position on the infilled wall body, the rear embedded part tie bar assembly comprises tie bars (2), an iron plate (3) and expansion bolts (4), the tie bars are of a semi-frame-shaped structure formed by a middle transverse bar and vertical bars bent at right angles at the two ends of the transverse bar, and hook-shaped structures are arranged at the tail ends of the vertical bars; transverse bars of the tie bars are welded to the iron plate, vertical bars of the tie bars are perpendicular to the iron plate, and round holes are formed in the rectangular iron plate. Holes are drilled in the steel bar planting positions of the filling wall, expansion bolts are installed in the holes, the outer ends of the expansion bolts are arranged in the round holes in the iron plates, and the expansion bolts are fixed to the surface of the filling wall through fastening nuts (5) connected with the outer ends of the expansion bolts. The problem that in the prior art, the one-time acceptance qualification rate of a tie bar pull-out test is low due to a common bar planting method of an infilled wall is solved.

Description

Technical Field

[0001] This utility model relates to the field of building infill wall tie bar technology, specifically to a building infill wall tie bar structure that replaces rebar installation. Background Technology

[0002] Infill wall tie bars are an important part of masonry construction. Their function is to install steel reinforcement within the wall to strengthen the connection between the wall and the main structure, thereby improving the wall's seismic performance. The pull-out test of the rebar is a crucial step in ensuring structural safety during masonry construction. There are two methods for installing masonry tie bars: pre-embedded and post-installed. Post-installed tie bars are called rebar anchoring. Rebar anchoring involves drilling holes in the concrete, wall, or rock substrate, injecting high-strength anchoring adhesive, inserting steel bars or profiles, and then bonding the rebar to the substrate after the adhesive cures. This is a commonly used construction technique in the reinforcement industry.

[0003] Chinese patent document CN106545168A discloses a construction method for connecting tie bars in infill walls. The method involves fabricating a threaded sleeve that matches the tie bars. Before pouring concrete, the steel bars to be pre-embedded in the concrete are processed, with the exposed portion threaded with a 30mm-50mm thread on a threading machine. The threaded steel bars are then installed in designated positions, with only 100mm exposed on the formwork. Finally, after demolding, the remaining 100mm exposed portion of the steel bar is connected to the steel bars to be pre-embedded in the masonry using the threaded sleeve. However, this patent method, where the tie bars are pre-embedded in the wall, suffers from the problem of inaccurate hole placement.

[0004] Tie bars in infill wall masonry are steel bars that connect the newly constructed infill wall to the original concrete structure through rebar installation according to specific structural requirements. Tie bars are steel bars that connect the later-built infill wall to the original concrete structure. They are typically 6mm diameter bars, spaced 500mm apart vertically, and have hooks at their ends.

[0005] Existing technologies for infill walls often suffer from problems such as insufficient hole depth, inaccurate hole location, incomplete hole cleaning after drilling, and insufficient adhesive, resulting in a low first-time pass rate for pull-out tests of tie bars.

[0006] In view of the above, this utility model is hereby applied for. Utility Model Content

[0007] This utility model provides a novel construction structure for adhesive-free post-installed anchors for tie bars in infill walls, which solves the problems of insufficient hole depth, inaccurate hole position, incomplete hole cleaning after drilling, and insufficient adhesive in existing tie bar installation methods, resulting in a low first-time pass rate for tie bar pull-out tests.

[0008] To solve the above problems, this utility model provides a novel adhesive-free post-installed anchorage structure for infill wall tie bars, including an infill wall 1. The structure is characterized by including a post-installed anchorage tie bar assembly located at the rebar anchoring position on the infill wall 1. The post-installed anchorage tie bar assembly includes tie bars 2, an iron plate 3, and expansion bolts 4. The tie bar 2 is a semi-frame structure formed by a central horizontal bar 21 and vertical bars 22 bent at right angles at both ends of the horizontal bar 21. The ends of the vertical bars 22 have hook-shaped structures 23. The horizontal bars 21 of the tie bar 2 are welded to the iron plate 3, and the vertical bars 22 are perpendicular to the iron plate 3. The rectangular iron plate 3 has round holes 31. Holes 11 are drilled at the rebar anchoring positions on the infill wall 1, and expansion bolts 4 are installed in the holes 11. The outer ends of the expansion bolts 4 are located in the round holes 31 on the iron plate 3, and fastening nuts 5 connected to the outer ends of the expansion bolts 4 fix the expansion bolts 4 to the surface of the infill wall 1.

[0009] Furthermore, the novel infill wall tie bar adhesive-free post-installed embedded construction structure of this utility model has the following characteristics: the horizontal bar 21, the vertical bar 22 and the hook-shaped structure 23 are formed by bending a single steel bar.

[0010] Furthermore, the novel infill wall tie bar glue-free post-embedded component construction structure of this utility model has the following characteristics: the two vertical bars 22 are parallel to each other and the two hook-shaped structures 23 are arranged opposite each other.

[0011] Advantages of this utility model:

[0012] The post-installed anchor tie bar assembly is constructed using reinforcing bars, iron plates, and expansion bolts, replacing the existing rebar installation technology. It eliminates the need for adhesives and achieves a high first-time pass rate in the tie bar pull-out test.

[0013] Drill holes in the concrete wall where rebar needs to be installed according to the design requirements, and install the embedded tie bar assembly with expansion bolts, ensuring that the installation is firm and the position is accurate.

[0014] The overall structure is simple, easy to construct, saves time, and improves efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 yes Figure 1 Schematic diagram of the tie rod and iron plate;

[0017] Figure 3 yes Figure 2 Schematic diagram of the tie bar structure;

[0018] Figure 4 yes Figure 1 Enlarged view of section I in the middle.

[0019] Symbols in the diagram: 1. Infill wall, 11. Hole, 2. Tie bar, 21. Horizontal bar, 22. Vertical bar, 23. Hook structure, 3. Iron plate, 31. Round hole, 4. Expansion bolt, 5. Fastening nut, 6. Weld. Detailed Implementation

[0020] The present invention will now be described in detail using the preferred embodiments.

[0021] like Figure 1-4 As shown, the novel infill wall tie bar adhesive-free post-installed embedded structure includes an infill wall 1 and a post-installed embedded tie bar assembly set at the rebar anchoring position on the infill wall 1. The post-installed embedded tie bar assembly includes tie bars 2, iron plates 3, and expansion bolts 4. The tie bar 2 is a semi-frame structure composed of a middle horizontal bar 21 and vertical bars 22 bent at right angles at both ends of the horizontal bar 21. The ends of the vertical bars 22 have hook-shaped structures 23. The horizontal bar 21, vertical bar 22, and hook-shaped structure 23 are a single steel bar. The structure is formed by bending; two vertical ribs 22 are parallel to each other and two hook-shaped structures 23 are set opposite each other; the horizontal ribs 21 of the tie ribs 2 are welded to the iron plate 3, and the vertical ribs 22 are perpendicular to the iron plate 3. The rectangular iron plate 3 has round holes 31; holes 11 are drilled in the reinforcement part of the infill wall 1, and expansion bolts 4 are installed in the holes 11. The outer end of the expansion bolts 4 is set in the round holes 31 on the iron plate 3. The outer end of the expansion bolts 4 is connected to the fastening nut 5, thereby fixing the expansion bolts 4 to the surface of the infill wall 1.

[0022] Based on past construction experience, the inventors have developed a "glue-free installation method for infill wall tie bars". By installing prefabricated iron parts, the construction quality is improved and the construction efficiency is effectively increased.

[0023] This invention welds tie bars to a drilled iron plate to form precast iron components. Holes are then drilled at the rebar installation locations according to design requirements. After drilling, expansion bolts are used to connect and fix the precast iron components. This method allows for "installation and construction simultaneously." In terms of quality control, it effectively improves the first-time pass rate of tie bar pull-out tests, ensuring that the hole depth and location meet quality requirements. It also avoids problems such as incomplete hole cleaning and insufficient adhesive used in existing rebar installation methods. This ensures a reliable connection between the infill wall and the main structure, enhances overall stability, improves the construction quality of tie bars, avoids rework and repairs, effectively increases overall construction speed, enhances overall stability, improves construction efficiency, and reduces construction costs.

[0024] The practical application of this invention in multiple experimental projects has yielded significant quality, economic, and social benefits, and it has reference value for similar engineering construction and broad application prospects.

[0025] This utility model is applicable to construction projects involving the installation of tie bars in infill walls.

[0026] Precast iron components are fabricated by welding iron plates and tie bars. The tie bars in this project are 6mm in diameter. The iron plates are 150mm*50mm*5mm in size. Two 14mm diameter round holes are drilled in the middle of the iron plate. The steel bars used for the tie bars are made into U-shapes and welded to the iron plates at the bottom. The long side of the steel bars meets the design requirements.

[0027] Installation of tie bars and iron parts: Drill holes in the concrete wall where the rebar needs to be installed according to the design requirements. The drilling depth is 100mm. After drilling, install the M12 expansion bolts into the holes. After installation, unscrew the expansion bolt nuts. Fit the prefabricated iron parts with round holes onto the threaded rods. After accurate positioning, install the nuts and install them securely to complete the work.

[0028] Key points of operation: Determine the location of the tie bar and drill holes. Check the drawings and specifications and set a tie bar every 400mm along the height of the infill wall. Mark the location where the tie bar needs to be installed and drill holes at the location where the bar needs to be installed according to the design requirements. The drilling depth is 100mm. Clean the debris in the hole after drilling.

[0029] Processing of tie bars: The machinery used for processing includes bending machines and cutting machines. The tie bars of this utility model use steel bars with a diameter of 6mm. The length of the tie bars should not be less than 1 / 5 of the wall length and not less than 1000mm. The tie bars are made into U-shapes with 135-degree hooks at the ends.

[0030] Fabrication of fixing iron plates: Two types of iron plates are used in this project: 150mm*50mm*5mm plates with two 14mm diameter holes drilled in the middle, and 50mm*50mm*5mm plates with one 14mm diameter hole drilled in the middle. These are used for 200mm and 100mm thick walls, respectively. For the 100mm thick wall, the tie bars are fixedly welded to the bottom of the iron plate, 6mm upwards, symmetrically on both sides of the plate, and fully welded at a 90° angle to the iron plate.

[0031] Install expansion bolts: Insert the M12 expansion bolts into the holes, allowing them to expand completely and securely. After installation, unscrew the expansion bolt nuts.

[0032] Install the tie bar weldment and install the nuts: Place the expansion bolts into the prefabricated perforated iron plate, then install the nuts and tighten them with a wrench.

[0033] Economic benefits: Traditional methods of anchoring rebar require 24 hours for the adhesive to solidify. However, this new method can save the curing time of chemical anchoring, allowing for immediate installation. Based on actual conditions, after deducting workers' regular rest time, each person can save 12 hours of work time per day, or 1.5 workdays.

[0034] This invention effectively improves the construction quality of rebar installation, ensures a reliable connection between the infill wall and the main structure, enhances overall stability, avoids rework and repairs, increases overall construction speed, and reduces construction costs, thus having good promotional value.

Claims

1. A novel infill wall tie bar adhesive-free post-installed embedded construction structure, comprising an infill wall (1), characterized in that, It also includes a post-installed anchor tie bar assembly set at the anchoring position on the infill wall (1). The post-installed anchor tie bar assembly includes a tie bar (2), an iron plate (3) and an expansion bolt (4). The tie bar (2) is a semi-frame structure consisting of a middle horizontal bar (21) and vertical bars (22) bent at right angles at both ends of the horizontal bar (21). The ends of the vertical bars (22) have hook-shaped structures (23). The horizontal bars (21) of the tie bar (2) are welded to the iron plate (3), and the vertical bars (22) are perpendicular to the iron plate (3). The rectangular iron plate (3) has a round hole (31). Holes (11) are drilled at the anchoring position on the infill wall (1). An expansion bolt (4) is installed in the hole (11). The outer end of the expansion bolt (4) is set in the round hole (31) on the iron plate (3). The fastening nut (5) connected to the outer end of the expansion bolt (4) fixes the expansion bolt (4) to the surface of the infill wall (1).

2. The novel infill wall tie bar adhesive-free post-installed embedded construction structure as described in claim 1, characterized in that, The horizontal bars (21), vertical bars (22) and hook-shaped structure (23) are formed by bending a single steel bar.

3. The novel infill wall tie bar adhesive-free post-installed embedded construction structure as described in claim 1, characterized in that, The two vertical ribs (22) are parallel to each other and the two hook-shaped structures (23) are set opposite each other.

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