Stairwell shear wall and step joint slot type reinforcing mold

Abstract

The utility model discloses a stairway shear wall and step joint place clamping groove type reinforcing mould relates to building construction mould technical field, including clamping groove main part, lateral fastening subassembly and positioning guide component, clamping groove main part inserts the joint edge place of shear wall formwork and step formwork, a plurality of connecting holes are seted up to clamping groove main part along its length direction, lateral fastening subassembly passes through connecting hole and shear wall formwork and locks the clamping groove main part and shear wall formwork and fixes, positioning guide component includes the sleeve of two ends opening, is connected with spring return pin in the sleeve, and the top of spring return pin is provided with conical guide head, and conical guide head and the taper surface cooperation connection for preliminary positioning of shear wall formwork preset hole position, the utility model solves the quality problem such as the joint place leakage of traditional reinforcing mode, concrete fault platform, surface honeycomb pitted surface and formwork deformation etc.

Description

Technical Field

[0001] This utility model relates to the field of building construction mold technology, specifically a slot-type reinforcement mold for the joint between the shear wall and the tread of a stairwell. Background Technology

[0002] The slotted formwork at the joint between the shear wall and the steps in a stairwell is a specialized formwork technology used in the construction of cast-in-place reinforced concrete staircases. Its core principle is to precisely limit and fix the step formwork by pre-processing grooves on the shear wall side formwork. Groove positioning: A groove 120-150mm wide is cut into the stair side formwork, with the bottom of the groove inclined 20-30mm towards the step formwork side, facilitating smooth placement of the step formwork during installation. Fixing method: After the step formwork is embedded in the groove, it is tightened with an axe tip, combined with a pressure plate (15mm thick at the bottom) and formwork tie rods (50-100mm wide at the top) for double fixation to prevent deformation or sinking.

[0003] To ensure the stability of the step formwork, it is usually necessary to position and reinforce it. Traditional reinforcement methods typically use timber, fasteners, bolts, etc. However, due to accuracy deviations, fasteners are prone to loosening, leading to quality problems such as grout leakage, concrete misalignment, honeycomb pitting on the surface, and formwork deformation at the joints. Utility Model Content

[0004] This invention overcomes the shortcomings of existing technologies by proposing a slot-type reinforcement mold for the joint between the shear wall and the treads in stairwells. This mold is a specialized tool for reinforcing the formwork at the joint (construction joint) between the shear wall (vertical component) and the stair treads (horizontal component) in stairwells during building construction. It primarily addresses quality issues that traditional reinforcement methods easily lead to, such as grout leakage at the joint, concrete misalignment, surface honeycomb and pitting, and formwork deformation. This ensures the quality of concrete forming (geometric dimensions, flatness, and density) and structural safety at the joint.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A slot-type reinforcement mold for the joint between a shear wall and a step in a stairwell includes a slot body, a lateral fastening component, and a positioning guide component. The slot body is embedded at the edge of the joint between the shear wall template and the step template, and is positioned along the length of the shear wall template. The lateral fastening component includes adjustable bolts and clips. Several connecting holes are provided on the slot body along its length. The adjustable bolts and clips pass through the connecting holes and the shear wall template to lock and fix the slot body and the shear wall template. The positioning guide component includes a sleeve with openings at both ends. A spring return pin is connected inside the sleeve. A conical guide head is provided at the top of the spring return pin. Conical grooves are provided at both ends and the middle of the bottom of the slot body. The conical guide head is adapted to the conical groove. Initial positioning is achieved by the conical guide head engaging with the conical surface of the pre-set conical groove at the bottom of the slot body.

[0006] Furthermore, the upper part of the card slot body has several slots along its length.

[0007] Furthermore, the groove cross-section is U-shaped or L-shaped.

[0008] Furthermore, reinforcing ribs are provided at intervals along the length of the card slot body.

[0009] Furthermore, a transparent viewing window is provided along the length of the sleeve, and a scale is embedded in the viewing window.

[0010] Furthermore, a positioning rod is provided on the outside of the sleeve, and the two ends of the positioning rod are fixed to the shear wall template and the step template, respectively.

[0011] The beneficial effects of this utility model compared to the prior art are as follows: 1. This utility model uses a slot body to embed into the joint edge of the shear wall formwork and the step formwork to form an overall constraint. The side fastening component can tightly lock the edge of the formwork to the slot opening, eliminating gaps and effectively preventing grout leakage.

[0012] 2. This utility model achieves initial positioning by cooperating with the conical surface of the positioning guide component and the preset hole of the template, visually adjusting the joint gap with the scale, and automatically clamping the template frame with the spring pin to ensure that the installation deviation is ≤1mm, thereby improving the template docking efficiency by 30%.

[0013] 3. The main body of the slot and the reinforcing ribs of this utility model form an integral rigid frame, providing lateral and vertical restraint forces to the template, resisting the lateral pressure (about 20-30kN / m²) and vibration impact force during concrete pouring, and ensuring that the template at the joint does not shift or deform. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the card slot body described in this utility model; Figure 2 This is a side view of the card slot body described in this utility model; Figure 3 This is a schematic diagram showing the installation position of the card slot body described in this utility model; Figure 4 This is a front view of the mounting position of the card slot body described in this utility model; Figure 5 This is a structural diagram of the positioning guide component; In the figure, 1 is the card slot body, 2 is the shear wall formwork, 3 is the step formwork, 4 is the lateral fastening component, 5 is the connecting hole, 6 is the sleeve, 7 is the viewing window, 8 is the spring return pin, 9 is the conical guide head, and 10 is the positioning rod. Detailed Implementation

[0015] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, this utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it. The technical solution of this utility model will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0016] See Figure 1 and Figure 5 This embodiment proposes a slot-type reinforcement mold for the joint between the shear wall and the tread in a stairwell, including a slot body 1, a lateral fastening component 4, and a positioning guide component. The slot body 1 is used to embed into the joint edge of the shear wall template 2 and the tread template 3. The slot body 1 is set along the length direction of the shear wall template 2. The slot body 1 is a plate-shaped structure. Several slots are provided on the upper part of the slot body 1 along its length direction. The slot cross-section is "U"-shaped or "L"-shaped. The slot size matches the edge thickness of the shear wall template 2 (e.g., a slot width of 15.5-16mm corresponds to a 15mm thick template). Reinforcing ribs (spaced 300-500mm apart) are provided at intervals along the length direction of the slot body 1 to improve the rigidity of the main body (to prevent the mold from deforming during concrete pouring). The material is the same as the main body.

[0017] The lateral fastening assembly 4 includes adjustable bolts and clips. The slot body 1 has several connecting holes 5 along its length. When the slot body 1 is embedded into the joint edge of the shear wall template 2 and the step template 3, the adjustable bolts and clips pass through the connecting holes 5 and the shear wall template 2 to lock and fix the slot body 1 and the shear wall template 2, eliminating gaps.

[0018] The positioning guide assembly is precision-machined from 45# steel. The main body is a "T"-shaped structure, including a sleeve 6 open at both ends. A transparent viewing window 7 is provided along the length of the sleeve 6, with a scale (minimum graduation 0.5mm) embedded within the viewing window 7. A spring return pin 8 is connected inside the sleeve 6, with a conical guide head 9 at its top. The conical guide head 9 is located on the outside of the sleeve 6, and a positioning rod 10 is located on the outside of the sleeve 6. Conical grooves are provided at both ends and the middle of the bottom of the slot body 1. The conical guide head 9 adapts to the conical grooves, achieving initial positioning through the engagement of the conical guide head 9 with the conical surface of the pre-set conical groove at the bottom of the slot body 1. The positioning rod 10 is used to fix the shear wall template 2 and step template 3 on both sides with bolts. The scale allows for visual adjustment of the height of the slot body 1, and the spring return pin 8 automatically clamps the frame of the slot body 1, ensuring an installation deviation ≤1mm and improving the docking efficiency of the slot body 1 by 30%.

[0019] Understandably, the positioning guide components enable the mold to be quickly aligned with the design position of the shear wall and the step template during installation (such as elevation and axis deviation ≤2mm), ensuring accurate geometric dimensions at the joint.

[0020] The working principle of the slot-type reinforcement mold at the joint between the shear wall and the tread in the stairwell proposed in this embodiment is as follows: The joint template is reinforced through "slot fitting + precise positioning + rigid constraint": 1. Pre-positioning: According to the construction drawings, mark the joint position on the edge of the shear wall formwork 2 and the step formwork 3. Use a positioning guide component at both ends and the middle of the joint position to align with the marking line. Fix the sleeve 6 to the shear wall formwork 2 and the step formwork 3 on both sides with bolts by using the positioning rod 10. Then, adjust the spring return pin 8 according to the required height with reference to the scale. Then, insert the slot body 1 into the joint position so that the conical guide head 9 matches the conical surface of the preset hole of the slot body 1 to achieve preliminary positioning.

[0021] 2. Tightening and locking: Tighten the lateral fastening component 4 to tightly fit the shear wall template 2 and the slot body 1 with the squeezing force of the bolts or clips, eliminating gaps (gap control ≤0.5mm to prevent grout leakage).

[0022] 3. Rigid constraint: The main body 1 of the slot and the reinforcing rib form an integral rigid frame, which provides constraint force on the shear wall formwork 2, resists the lateral pressure (about 20-30kN / m²) and vibration impact force during concrete pouring, and ensures that the formwork at the joint does not shift or deform.

[0023] Compared to traditional reinforcement methods (such as steel pipe couplers, tie bolts, and timber back bracing), it has the following core advantages: Positioning accuracy Relying on manual marking, the deviation is often ≥5mm Positioning component guidance, deviation ≤2mm Strengthen reliability Fasteners are prone to loosening, grout leakage, and misalignment. The slotted fit and rigid constraint prevent grout leakage and misalignment. Installation efficiency Reinforcing a single point takes 3-5 minutes (bolt / fastener connection). Engage and tighten, ≤1 minute per point Turnover Timber / fasteners are easily damaged and can be reused ≤10 times. Made of aluminum alloy, with a turnover of ≥50 times. Concrete quality The honeycomb and pitted surface rate at the joint is approximately 8-15%. Surface flatness ≤3mm / 2m, no quality defects The construction application process of the slot-type reinforcement mold at the joint between the shear wall and the tread in the stairwell proposed in this embodiment is as follows: 1. Pre-assembly of formwork: Pre-assemble the shear wall formwork 2 and the step formwork 3 on the ground, and mark the joint edge lines; 2. Mold installation: The main body 1 of the slot is initially positioned by embedding it into the edge of the shear wall template 2 along the joint line using the positioning guide component; 3. Tighten and lock: Tighten the lateral fastening component 4 to make the card slot body 1 fit tightly with the shear wall formwork 2 (use a feeler gauge to check the gap ≤0.5mm). 4. Concrete pouring: Pour in layers (each layer ≤ 500mm), with the vibrator ≥ 100mm away from the mold (to avoid impact deformation); 5. Demolding and reuse: After the concrete strength reaches 1.2MPa (approximately 12-24 hours after pouring), loosen the fastening device, remove the mold, clean it, and keep it for later use.

[0024] The core technical problem solved by this utility model is: 1. Grout leakage and misalignment: The slotted fitting eliminates gaps in the formwork, and the rigid constraint resists deformation, solving the traditional problems of "formwork running away" and "grout leakage"; 2. Efficiency and cost: Simplified installation process (eliminating steps such as bolt drilling and fastener tightening), reducing labor costs by 30-40%; 3. Quality stability: Standardized molds ensure consistent geometric dimensions at the joints, improving the structural safety and aesthetics of the stairwell.

[0025] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. It should not be considered that the specific embodiments of the present invention are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the present invention, and all such deductions or substitutions should be considered to fall within the scope of patent protection determined by the submitted claims.

Claims

1. A slot-type reinforcement mold for the joint between the shear wall and the treads in a stairwell, characterized in that, The device includes a slot body (1), a lateral fastening component (4), and a positioning guide component. The slot body (1) is embedded at the joint edge of the shear wall template (2) and the step template (3). The slot body (1) is set along the length of the shear wall template (2). The lateral fastening component (4) includes adjustable bolts and buckles. Several connecting holes (5) are opened on the slot body (1) along its length. The adjustable bolts and buckles pass through the connecting holes (5) and the shear wall template (2) to lock and fix the slot body (1) and the shear wall template (2). The positioning guide component includes a sleeve (6) with openings at both ends. A spring return pin (8) is connected inside the sleeve (6). A conical guide head (9) is set on the top of the spring return pin (8). Conical grooves are set at both ends and the middle of the bottom of the slot body (1). The conical guide head (9) is adapted to the conical groove. The initial positioning is achieved by the conical guide head (9) cooperating with the conical surface of the pre-set conical groove at the bottom of the slot body (1).

2. The slot-type reinforcement mold for the joint between the shear wall and the tread in a stairwell, as described in claim 1, is characterized in that... The upper part of the card slot body (1) has several slots along its length.

3. A slot-type reinforcement mold for the joint between the shear wall and the tread in a stairwell, as described in claim 2, is characterized in that... The groove cross-section is U-shaped or L-shaped.

4. A slot-type reinforcement mold for the joint between the shear wall and the tread in a stairwell, as described in claim 1, is characterized in that... Reinforcing ribs are provided at intervals along the length of the card slot body (1).

5. A slot-type reinforcement mold for the joint between the shear wall and the tread in a stairwell, as described in claim 1, is characterized in that... A transparent viewing window (7) is provided along the length of the sleeve (6), and a scale is embedded in the viewing window (7).

6. A slot-type reinforcement mold for the joint between the shear wall and the tread in a stairwell, as described in claim 5, is characterized in that... A positioning rod (10) is provided on the outside of the sleeve (6), and the two ends of the positioning rod (10) are fixed to the shear wall template (2) and the step template (3) respectively.

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