A detachable aluminum alloy bottom formwork steel truss floor deck

Abstract

This utility model relates to the field of building construction mold technology and discloses a detachable aluminum alloy bottom formwork steel truss floor deck. It includes a base plate, a truss body disposed on top of the base plate, and installation components. The installation components include an installation groove on the top of the base plate, fasteners inserted into the installation groove, bolts threaded onto the fasteners, and limiting blocks and elastic plates disposed inside the fasteners. The truss body is embedded in the fasteners and deforms by compressing the elastic plates, achieving stable positioning in conjunction with the limiting blocks. Connecting components consisting of sliding grooves, locking grooves, sliders, and locking blocks are also provided on both sides of the base plate. This utility model effectively solves the problem of easy shaking and loosening of the truss body through the internal and external dual locking mechanism of the installation components, and achieves precise anti-misalignment splicing of adjacent base plates through the connecting components, significantly improving construction quality and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of building construction mold technology, and in particular to a detachable aluminum alloy bottom mold steel truss floor deck. Background Technology

[0002] Reinforced truss floor decking is a composite formwork where the reinforcing steel bars in the floor slab are fabricated into steel trusses in a factory, and these trusses are then integrated with the bottom formwork. In building construction, reinforced truss floor decking is widely used because it significantly reduces on-site rebar tying work and accelerates construction progress. The bottom formwork, as a crucial component of the floor decking, not only bears the self-weight of the concrete and construction loads during the construction phase but also directly affects the forming quality of the floor slab's bottom surface.

[0003] However, in existing reinforced steel truss floor slab technology, especially in detachable structures using aluminum alloy bottom formwork, the stability of the connection between the truss main body and the bottom formwork remains a challenge. To achieve detachability, simple clips or bolts are typically used for connection. However, during actual transportation bumps or hoisting on the construction site, this connection method often lacks sufficient elastic cushioning and multi-directional restraint mechanisms, causing the truss main body to easily sway or even loosen on the bottom formwork. This not only affects the overall rigidity of the structure but may also create safety hazards.

[0004] Furthermore, since aluminum alloy formwork is typically constructed from multiple panels, the tightness of the connection between adjacent formwork panels is crucial. Existing splicing structures often rely on simple butt joints or single lap joints. When pouring concrete, the fluid pressure and vibration can easily cause relative misalignment or widening of gaps between adjacent formwork panels, leading to severe grout leakage. This not only wastes materials but also causes honeycomb and pitted surfaces on the floor slab, seriously affecting the quality and appearance of the poured concrete.

[0005] Therefore, this utility model proposes a detachable aluminum alloy bottom formwork steel truss floor deck to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a detachable aluminum alloy bottom formwork steel truss floor deck, which aims to improve the existing technology where the main body of the steel truss floor deck is not firmly fixed during transportation and installation, is prone to shaking and loosening, and the simple splicing structure of adjacent bottom plates is prone to misalignment, leading to grout leakage during concrete pouring, thus affecting construction quality and efficiency.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a detachable aluminum alloy bottom formwork steel truss floor deck, comprising: a bottom plate and a truss body disposed on the top of the bottom plate, and an installation assembly disposed on the top of the bottom plate.

[0008] The base plate has a mounting groove at its top. The mounting assembly includes a fastener inserted into the mounting groove, a bolt threaded onto the fastener, and a limiting block and an elastic plate disposed inside the fastener. The truss body is embedded inside the fastener and presses against the elastic plate. The elastic plate undergoes elastic deformation under force and uses its rebound force to limit the truss body. The limiting block cooperates with the elastic plate to prevent the truss body from shaking or loosening inside the fastener.

[0009] Furthermore, the fastener is inserted into the mounting groove, which restricts the fastener from misalignment, and the bolt locks the fastener securely inside the mounting groove. The mounting assembly then fixes the truss body to the top of the base plate, forming a stable connection structure.

[0010] Preferably, the base plate is provided with a connecting assembly on its side. The connecting assembly includes a sliding groove and a locking groove formed on one side of the base plate, and a slider and a locking block protruding from the other side of the base plate. This arrangement allows adjacent base plates to be connected through multiple structures, improving the stability of the splicing.

[0011] Preferably, the slider is slidably connected to the sliding groove of the adjacent base plate, and the locking block is slidably inserted into the locking groove of the adjacent base plate. This sliding and inserting mechanism effectively fixes the adjacent base plates and prevents misalignment in the horizontal and vertical directions.

[0012] Preferably, one end of the elastic sheet is fixedly connected to the inner wall of the fastener, and the other end of the elastic sheet is suspended and has an arc-shaped curved structure, with the truss body abutting against the arc-shaped surface of the elastic sheet. The arc-shaped structure design allows the elastic sheet to better conform to the outer wall of the truss body, providing a continuous and stable clamping force.

[0013] Preferably, the limiting block is fixedly connected to the inner bottom wall of the fastener, and the limiting block is located below the bottom reinforcing bars of the truss body. The shape of the limiting block is adapted to the outer contour of the truss body. This adaptability design further enhances the limiting effect on the truss body and prevents it from shifting.

[0014] Preferably, the fastener has a U-shaped structure, and its outer contour slides into the inner contour of the mounting groove. A threaded hole is provided at the bottom of the fastener for the bolt to pass through. The U-shaped structure not only facilitates the accommodation of the truss body but also provides a good guiding fit with the mounting groove.

[0015] Preferably, the bolt penetrates the bottom wall of the fastener vertically, and the end of the bolt abuts against the bottom of the mounting groove, thereby securing the fastener within the mounting groove through a counterforce. This tightening method is simple to operate and provides a secure fixation, effectively resisting external interference.

[0016] Preferably, the sliding groove extends along the length of the base plate, the locking groove is located to the side of the sliding groove, and the cross-sectional shape of the sliding groove is dovetail-shaped or T-shaped. The dovetail-shaped or T-shaped cross-section design has a self-locking function, which can prevent the slider from disengaging under force and enhance the reliability of the connection.

[0017] Preferably, the slider and the card block are integrally formed on the side wall of the base plate, and the position of the slider corresponds one-to-one with the position of the sliding groove.

[0018] This utility model has the following beneficial effects: 1. In this utility model, by first setting an elastic sheet and a limiting block inside the fastener, the rebound force generated by the truss body squeezing the elastic sheet, combined with the rigid support of the limiting block, solves the problem of the truss body easily shaking and loosening during transportation or installation in the prior art, and achieves the technical effect of multi-dimensional limiting of the truss body, eliminating installation gaps and improving structural stability.

[0019] 2. In this utility model, by setting mutually cooperating sliding grooves, sliders, and slots and blocks on both sides of the base plate, the problem of misalignment easily occurring when adjacent base plates are spliced, which leads to grout leakage during concrete pouring, is solved. This achieves the technical effects of precise docking of adjacent base plates, dual locking in both horizontal and vertical directions, and effective prevention of grout leakage. Attached Figure Description

[0020] Figure 1 This is a perspective view of a detachable aluminum alloy bottom formwork steel truss floor deck proposed in this utility model; Figure 2 This is a schematic diagram of a fastener for a detachable aluminum alloy bottom formwork steel truss floor deck proposed in this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of a slider for a detachable aluminum alloy bottom formwork steel truss floor deck proposed in this utility model.

[0021] Legend: 1. Base plate; 2. Mounting components; 201. Mounting groove; 202. Fastener; 203. Bolt; 204. Limiting block; 205. Elastic sheet; 3. Connecting components; 301. Sliding groove; 302. Locking block; 303. Sliding block; 304. Locking groove; 4. Truss main body. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figures 1-4 This utility model provides an embodiment of a detachable aluminum alloy bottom formwork steel truss floor deck, which aims to solve the structural defects in the prior art where the main body of the steel truss floor deck is prone to shaking and loosening during transportation and installation, and the adjacent bottom plates are prone to misalignment, leading to grout leakage.

[0024] The main structure of the detachable aluminum alloy bottom formwork steel truss floor deck includes a base plate 1 as a load-bearing base, and a truss body 4 fixedly connected to the top of the base plate 1 by an installation component 2. The base plate 1 is used to provide bottom mold support for concrete pouring and bear the upper load. The truss body 4 serves as the main load-bearing skeleton structure to improve the overall rigidity and strength of the floor deck. The installation component 2 serves as a connection medium to achieve stable installation and anti-loosening limit of the truss body 4 on the base plate 1.

[0025] In terms of specific structural arrangement, the top surface of the base plate 1 is provided with several mounting grooves 201. The mounting grooves 201 extend along the width direction of the base plate 1 and penetrate part of the surface of the base plate 1. The cross-sectional shape of the mounting grooves 201 is rectangular or inverted T-shaped to provide structural guidance. The mounting assembly 2 includes fasteners 202 that are slidably inserted into the mounting grooves 201. The outer contour of the fasteners 202 is adapted to the inner contour of the mounting grooves 201. By embedding the fasteners 202 into the mounting grooves 201, the sidewalls of the mounting grooves 201 are used to support the fasteners 202. To limit the movement and prevent the fastener 202 from deflecting or shifting, a threaded through hole is provided at the center of the bottom wall of the fastener 202. The bolt 203 is screwed into the threaded through hole through a threaded connection, and the end of the bolt 203 extends vertically downward and tightly abuts against the bottom wall of the mounting groove 201. The reverse lifting force generated by the rotation of the bolt 203 pushes the fastener 202 upward, thereby pressing and locking the upper surface or side wing of the fastener 202 with the corresponding structure of the mounting groove 201, thus fixing the position of the fastener 202 in the mounting groove 201.

[0026] Furthermore, to achieve effective gripping and shock absorption of the truss body 4, the fastener 202 has a U-shaped channel structure. Its internal space is used to accommodate the bottom reinforcing bars of the truss body 4. An elastic sheet 205 is fixedly connected to the inner wall of the fastener 202. The elastic sheet 205 is made of an arc-shaped metal spring with high resilience. Its convex surface is set towards the center area of ​​the fastener 202. When the truss body 4 is pressed into the fastener 202, the outer wall of the truss body 4 compresses the elastic sheet 205, causing it to undergo elastic deformation under force. The elastic potential energy stored in the elastic sheet 205 is maintained. Continue to apply lateral or upward abutment pressure to the truss body 4 to eliminate installation gaps. At the same time, limit blocks 204 are symmetrically fixedly connected to both sides of the inner bottom wall of the fastener 202. The limit blocks 204 are located below the bottom steel bars of the truss body 4. The top surface shape of the limit blocks 204 fits the outer contour of the truss body 4. Through the elastic compression of the elastic sheet 205 and the rigid support of the limit blocks 204, a multi-dimensional limit structure for the truss body 4 is constructed, which effectively prevents the truss body 4 from shaking, loosening or falling off inside the fastener 202.

[0027] The connecting component 3 includes a sliding groove 301 formed inside the long side wall of one side of the base plate 1 and a slot 304 formed on the end face of the side wall. The sliding groove 301 extends along the length direction of the base plate 1 and penetrates the end face of the base plate 1. The cross-sectional shape of the sliding groove 301 is dovetail-shaped or T-shaped to provide vertical constraint force. The slot 304 is located below the sliding groove 301 and is distributed at intervals along the length direction of the base plate 1 to provide a lateral positioning reference.

[0028] Meanwhile, on the other long side wall of the base plate 1, a protruding slider 303 and a locking block 302 are integrally formed. The cross-sectional shape and size of the slider 303 are adapted to the internal space of the sliding groove 301, and the shape and position of the locking block 302 correspond to the locking groove 304. During the manufacturing process of the base plate 1, the slider 303 and the locking block 302 are usually integrally formed with the body of the base plate 1 through an aluminum alloy extrusion process to ensure structural strength and connection accuracy.

[0029] When assembling floor decking at the construction site, the operator aligns the slider 303 on the side of the base plate 1 to be installed with the port of the sliding groove 301 on the side of the already installed base plate 1, and pushes the base plate 1 to be installed so that the slider 303 slides into the sliding groove 301 along its length. At this time, the slider 303 and the inner wall of the sliding groove 301 form a tight sliding fit. The dovetail or T-shaped interlocking structure restricts the relative displacement of adjacent base plates 1 in the vertical direction. When the slider 303 slides to the predetermined position, the locking block 302 on the side wall simultaneously inserts into the corresponding locking groove 304. This insertion fit structure of the locking block 302 and the locking groove 304 further restricts the separation or misalignment of adjacent base plates 1 in the horizontal direction, ensuring the flatness and sealing of the joint, and effectively preventing grout leakage during concrete pouring.

[0030] The elastic plate 205 is preferably designed as an arc-shaped structure, and its material is spring steel or high manganese steel with high yield strength. One end of the elastic plate 205 is fixedly connected to the upper area of ​​the inner side wall of the fastener 202 by welding or riveting, and the other end is suspended and extends downward to the center of the fastener 202 to form an arc-shaped contact surface. The radius of curvature of the arc-shaped contact surface is slightly smaller than the radius of the bottom steel bar of the truss body 4 to ensure that the point contact or line contact during contact can be converted into effective surface contact pressure. The contact point between the elastic plate 205 and the truss body 4 is located on the side below the cross section of the bottom steel bar of the truss body 4. Utilizing the upward rebound force, it not only provides clamping force in the horizontal direction, but also provides vertical upward lifting force, forming a stable three-point support structure with the bottom limiting block 204.

[0031] To improve the versatility and locking reliability of the mounting component 2, the fastener 202 is preferably made of high-strength nylon or aluminum alloy die casting. A metal nut kit is embedded in the threaded through hole at the bottom to enhance the thread connection strength and prevent the threads from stripping due to repeated disassembly and assembly. The bolt 203 is a set screw bolt with a flat end or anti-slip texture to increase the friction with the bottom of the mounting groove 201 and prevent the bolt from loosening due to vibration. At the same time, the bottom surface of the mounting groove 201 can be provided with micro-dimples or roughened areas for the bolt 203 ends to be embedded or engaged, further improving the fastener 202's ability to resist horizontal slippage.

[0032] The entrance of the sliding groove 301 may be provided with a chamfered or rounded guide surface to facilitate the quick alignment and sliding of the slider 303. The fit between the slider 303 and the sliding groove 301 is a transition fit or a small gap fit, which ensures both smooth sliding and accurate positioning. At the same time, the mating surfaces of the locking block 302 and the locking groove 304 may be coated with a lubricating coating or embedded with shock-absorbing rubber pads to reduce frictional resistance during installation and absorb vibration energy during construction.

[0033] Working principle: During the assembly and construction preparation stage of the steel truss floor deck, the truss body 4 and the base plate 1 are fixedly installed first. The operator aligns the bottom steel bar of the prefabricated truss body 4 with the opening of the fastener 202 in the installation component 2, and presses the truss body 4 down to make its bottom steel bar snap into the internal space of the fastener 202. During this process, the outer wall of the truss body 4 squeezes the elastic plate 205 located on the inner side wall of the fastener 202, forcing the elastic plate 205 to undergo elastic deformation outward and store rebound potential energy. When the truss body 4 is completely placed on the limiting block 204 at the bottom of the fastener 202, the elastic plate 205 uses its rebound force to tightly press against the side wall of the truss body 4. With the help of the limiting block 204 at the bottom, the primary clamping and anti-vibration limiting of the truss body 4 is achieved, effectively preventing the truss body 4 from shaking and loosening during subsequent handling or installation.

[0034] Subsequently, the fastener 202, which is assembled with the main truss body 4, is inserted vertically into the mounting groove 201 on the top surface of the base plate 1. The side wall of the mounting groove 201 provides circumferential restraint to the fastener 202 to prevent the fastener 202 from being misaligned or rotated during installation. After the fastener 202 is inserted into place, the operator uses a tool to turn the bolt 203, which is threaded to the bottom of the fastener 202, clockwise. The bolt 203 is turned downwards and its end presses against the bottom wall of the mounting groove 201. The resulting reaction force pushes the fastener 202 upwards, thereby forming a firm mechanical lock between the fastener 202 and the mounting groove 201, completing the final fixation of the main truss body 4 on the base plate 1.

[0035] When laying floor slabs at the construction site, multiple adjacent base plates 1 need to be spliced ​​together. At this time, the operator aligns the slider 303 on the side of the base plate 1 to be spliced ​​with the sliding groove 301 on the side of the already installed base plate 1, and pushes the base plate 1 to be spliced ​​so that the slider 303 slides into the sliding groove 301 along its length. During the sliding process of the slider 303, when the slider 303 reaches the predetermined position, the locking block 302 on the side wall of the base plate 1 to be spliced ​​is simultaneously inserted into the locking groove 304 on the side wall of the already installed base plate 1. Through the sliding cooperation between the slider 303 and the sliding groove 301 and the insertion cooperation between the locking block 302 and the locking groove 304, the adjacent base plates 1 are locked in both the horizontal and vertical directions. This achieves the effect of preventing misalignment or widening of gaps during installation or pouring of the base plates 1, thereby effectively avoiding the problem of grout leakage during concrete pouring.

Claims

1. A detachable aluminum alloy bottom formwork steel truss floor deck, comprising a bottom plate (1) and a truss body (4) disposed on top of the bottom plate (1), characterized in that, The base plate (1) is provided with an installation component (2) on top, and the truss body (4) is fixed to the top of the base plate (1) by the installation component (2); The mounting assembly (2) includes a mounting groove (201) opened on the top of the base plate (1), a fastener (202) inserted into the mounting groove (201), a bolt (203) threaded onto the fastener (202), and a limiting block (204) and an elastic sheet (205) disposed inside the fastener (202). The truss body (4) is embedded inside the fastener (202) and presses the elastic piece (205). The elastic piece (205) undergoes elastic deformation under force and uses its rebound force to limit the truss body (4). The limiting block (204) cooperates with the elastic piece (205) to prevent the truss body (4) from shaking or loosening inside the fastener (202). The fastener (202) is inserted into the mounting groove (201), the mounting groove (201) restricts the fastener (202) from being misaligned, and the bolt (203) locks the fastener (202) into the mounting groove (201).

2. The detachable aluminum alloy bottom formwork steel truss floor decking according to claim 1, characterized in that, The base plate (1) is provided with a connecting component (3) on its side. The connecting component (3) includes a sliding groove (301) and a slot (304) opened on one side of the base plate (1), and a slider (303) and a block (302) protruding from the other side of the base plate (1).

3. A detachable aluminum alloy bottom formwork steel truss floor deck according to claim 2, characterized in that, The slider (303) is slidably connected to the sliding groove (301) of the adjacent base plate (1), and the locking block (302) is slidably inserted into the locking groove (304) of the adjacent base plate (1) to fix the adjacent base plate (1) and prevent misalignment.

4. A detachable aluminum alloy bottom formwork steel truss floor decking according to claim 1, characterized in that, One end of the elastic sheet (205) is fixedly connected to the inner wall of the fastener (202), and the other end of the elastic sheet (205) is suspended and has an arc-shaped curved structure. The truss body (4) abuts against the arc-shaped surface of the elastic sheet (205).

5. A detachable aluminum alloy bottom formwork steel truss floor deck according to claim 1, characterized in that, The limiting block (204) is fixedly connected to the inner bottom wall of the fastener (202), and the limiting block (204) is located below the bottom steel bar of the truss body (4). The shape of the limiting block (204) is adapted to the outer contour of the truss body (4).

6. A detachable aluminum alloy bottom formwork steel truss floor decking according to claim 1, characterized in that, The fastener (202) has a U-shaped structure. The outer contour of the fastener (202) slides in conjunction with the inner contour of the mounting groove (201). The bottom of the fastener (202) has a threaded hole for the bolt (203) to pass through.

7. A detachable aluminum alloy bottom formwork steel truss floor deck according to claim 1, characterized in that, The bolt (203) penetrates the bottom wall of the fastener (202) in a vertical direction, and the end of the bolt (203) abuts against the bottom of the mounting groove (201), thereby clamping the fastener (202) into the mounting groove (201) by a reverse force.

8. A detachable aluminum alloy bottom formwork steel truss floor deck according to claim 2, characterized in that, The sliding groove (301) extends along the length of the base plate (1), the slot (304) is located on the side of the sliding groove (301), and the cross-sectional shape of the sliding groove (301) is dovetail-shaped or T-shaped.

9. A detachable aluminum alloy bottom formwork steel truss floor decking according to claim 3, characterized in that, The slider (303) and the card block (302) are integrally formed on the side wall of the base plate (1), and the position of the slider (303) corresponds one-to-one with the position of the sliding groove (301).

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