A temporary support construction structure of a stiffening beam

Abstract

This invention relates to the field of temporary support construction structures for stiffened beams, specifically a temporary support construction structure for stiffened beams, comprising an integrated support formwork system, a lifting mechanism, and a double-T-shaped support mechanism. The integrated support formwork system includes temporary support uprights and longitudinal and transverse connecting rods. The temporary support uprights are integrally fixed to the scaffolding system via snap-fit ​​fasteners. A liftable lifting mechanism is mounted on the top of each temporary support upright, and the upper end of the lifting mechanism supports the bottom template of the beam. A built-in double-T-shaped support mechanism is mounted inside the bottom template of the beam. This invention, through the integrated formwork system combined with the built-in support structure and the on-site scaffolding as auxiliary support, eliminates the need for custom-made special jigs based on different steel beam heights and spans, saving the traditional process of fabricating, erecting, and reinforcing numerous jigs, significantly reducing the input of temporary turnover materials, and lowering construction costs and material waste.

Description

Technical Field

[0001] This invention relates to the field of temporary support construction structures for stiffened beams, specifically a temporary support construction structure for stiffened beams. Background Technology

[0002] Currently, in the construction of large-span stiffened concrete beams, independently customized formwork is commonly used as a temporary support system for stiffened steel beams. This method requires the formwork to be processed separately according to the height and span of each steel beam, resulting in a large number of temporary support uprights and crossbars and high one-time material costs.

[0003] The scaffolding is erected at great heights and involves a large amount of work, requiring numerous high-altitude operations and resulting in a long overall construction period. Furthermore, after the steel beams are installed and the concrete is formed, a significant amount of scaffolding support needs to be manually dismantled. This dismantling process is cumbersome, requires substantial manpower, and carries safety risks such as falls and scaffolding instability during high-altitude dismantling.

[0004] Existing traditional formwork support systems are externally suspended supports that only support the bottom of the steel beams. They cannot achieve closed wrapping of the ends and side walls of the steel beams. After conventional construction, the ends of the steel beams are easily exposed and the edges of the steel sections are exposed to the outside of the concrete. The exposed steel structure is in long-term contact with air and moisture, which can easily lead to oxidation and corrosion, and weakening of the cross-section. This not only affects the durability of the components, but the expansion of corrosion can also cause cracking and spalling of the concrete surface, seriously affecting the overall structural stability and service life of the stiffened beam. At the same time, the traditional formwork and beam support system are independent of each other and cannot be combined. The repeated erection of the formwork results in serious material waste and low construction efficiency. Therefore, a temporary support construction structure for stiffened beams is proposed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this solution provides a temporary support construction structure for stiffened beams, including an integrated support formwork system, a lifting mechanism, and a double T-shaped support structure. The integrated support frame system includes temporary support poles and longitudinal and transverse connecting rods. The temporary support poles are fixed to the scaffolding system as a whole by snap fasteners. The top of the temporary support pole is equipped with a liftable lifting mechanism, and the upper end of the lifting mechanism supports the bottom template of the beam. The inner side of the bottom formwork of the beam is equipped with a built-in double T-shaped support mechanism. The double T-shaped support mechanism is set at the bottom of the stiffening beam H-beam to provide pre-positioned fixed-point support for the H-beam. By integrating the internal support and simultaneously encasing it in concrete, the H-beams are completely enclosed with no exposed parts, eliminating the need for subsequent frame removal.

[0006] Furthermore, the top of the temporary support pole is provided with an assembly through hole, and the bottom end of the lifting mechanism is limited and assembled inside the through hole to achieve vertical positioning and installation.

[0007] Furthermore, the lifting mechanism includes an internal threaded sleeve, an adjusting screw, and a top support plate. The internal threaded sleeve is rotatably mounted on the top of the upright, the adjusting screw is threaded into the inside of the internal threaded sleeve, and the top support plate is fixed to the top of the adjusting screw. The vertical height of the top support plate can be finely adjusted by rotating the sleeve.

[0008] Furthermore, the built-in double-T-shaped support mechanism is arranged inside the beam formwork and is completely hidden within the concrete pouring area, and does not serve as an external temporary support frame.

[0009] Furthermore, the top of the double T-shaped support mechanism is provided with an adapter slot and a clearance opening, and the bottom of the H-beam is bolted to the double T-shaped support mechanism by studs to achieve pre-positioning for hoisting.

[0010] Furthermore, side formwork is assembled on both sides of the beam, and the side formwork and the bottom formwork of the beam together form a complete casting cavity. End sealing formwork is set at both ends of the casting cavity to completely enclose the ends of the H-beam and prevent the steel from being exposed.

[0011] Furthermore, tie bolts are inserted between the side formwork of the beam, and the tie bolts are arranged at equal intervals along the span of the beam to lock and fix the side formwork and resist the lateral pressure of the concrete.

[0012] Furthermore, the spacing of the tie bolts is set to 700mm to ensure that the template system is subjected to uniform stress and has a regular shape.

[0013] Furthermore, the double-T support mechanism is integrally formed from a bottom horizontal connecting end and two vertical support ends symmetrically arranged at the top, forming an inverted double-T structure. The double-T-shaped support mechanism is made of high-strength hard concrete or fine stone concrete precast material. The whole can be fully integrated with the later poured beam concrete. After the pouring is completed, it is permanently left inside the stiff beam, replacing the traditional detachable frame support system.

[0014] A construction method for a temporary support structure for stiffened beams includes the following construction steps: Step 1: Erect the scaffolding and formwork system as a whole, fix multiple temporary support poles with clips, and connect the longitudinal and transverse members to form the overall frame; assemble the top support mechanism of the poles, adjust the height of the screw rods, and ensure that the top support plate accurately supports the bottom formwork of the beam; Step 2: Fix and install multiple sets of double T-shaped built-in support mechanisms inside the bottom formwork of the beam, hoist the stiff H-beam into place, and fix and limit its position to the double T-shaped support mechanisms by bottom studs; Step 3: Install the formwork on both sides of the beam and the end sealing formwork to form a completely closed casting cavity, ensuring that the H-beam is entirely inside the cavity with no exposed ends; Step 4: Arrange tie bolts at intervals along the beam direction and tighten them to complete the overall formwork reinforcement; Step 5: Complete the overall verification, leveling, and fixing of the large-span stiffened steel beam; Step Six: Pour the beam concrete in one go, ensuring the concrete completely encloses the H-beam body and its ends; Step 7: After the concrete has cured and set, remove the external formwork, supporting mechanism and temporary poles, and permanently bond the internal double-T support to the beam concrete.

[0015] The technical solution provided in this application has at least the following technical effects or advantages: 1. This invention adopts an integrated formwork system combined with a built-in support structure, using on-site scaffolding as auxiliary support, thus eliminating the need to customize and process special formwork according to different steel beam heights and spans. This saves a lot of formwork fabrication, erection, and reinforcement processes in traditional processes, significantly reducing the input of temporary turnover materials and lowering construction costs and material waste. 2. This invention adopts a precast high-strength concrete double-T support structure, which is an inverted double-T integral molding structure with high structural rigidity and balanced stress. After the concrete is poured, it can form an integral part with the beam concrete, and the support stability is much higher than that of traditional temporary steel frame. At the same time, the support structure is permanently left inside the beam and does not need to be dismantled. This not only shortens the construction period, but also ensures the safety of high-altitude operations. 3. In this invention, the double T-shaped support mechanism is set with slots and clearance openings for fixing with studs, which can achieve pre-positioning and limiting support for the hoisted steel beam, effectively avoiding sinking, displacement and shaking problems after the hoisting of large-span steel beams, and making the installation and positioning of the steel beam more stable and reliable. 4. The overall construction process of this invention is simple and centralized. The formwork erection, steel beam positioning, closed pouring, and molding and curing are carried out in a continuous manner with less cross-interference and less manual input, making it suitable for batch construction scenarios of large-area and large-span stiff beams. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the casting state of the H-beams in this application; Figure 2 This is a schematic diagram of the H-beam in the demolded state of this application; Figure 3 For this application Figure 2 Enlarged structural diagram of region A in the middle; Figure 4 This is a schematic diagram of the double-T-shaped support mechanism structure of this application; Figure 5 This is a side view of the horizontal connection end and the vertical support end of this application. Figure 6 This is a partial structural diagram of the temporary support pole in this application; Figure 7 This is a schematic diagram of the internal threaded sleeve structure of this application.

[0017] In the diagram: 1-Integrated support formwork system; 2-Lifting mechanism; 21-Internal threaded sleeve; 22-Adjusting screw; 23-Top support plate; 3-Double T-shaped support mechanism; 31-Horizontal connection end; 32-Vertical support end; 4-Temporary support pole; 5-Longitudinal and transverse connecting rods; 6-Beam bottom formwork; 7-H-beam; 8-Side formwork; 9-Tie bolts. Detailed Implementation

[0018] This application discloses a temporary support construction structure for stiffened beams. The technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0019] To better understand the above technical solution, the following will provide a detailed explanation of the above technical solution in conjunction with the accompanying drawings and specific implementation methods.

[0020] Please see Figures 1 to 7 This embodiment discloses a temporary support construction structure for stiffened beams, which is mainly composed of an integrated support formwork system 1, a liftable lifting mechanism 2, and a built-in double T-shaped support mechanism 3. It is suitable for the installation, positioning, and overall enclosed pouring construction of large-span stiffened concrete H-beams. Unlike the traditional independent steel frame erection and dismantling process, this application achieves full enclosure of the steel beam without exposure, avoids the dismantling of a large number of temporary supports, and achieves efficient and stable construction.

[0021] In this application, the pre-existing scaffolding system erected on the construction site is used as the basic load-bearing base in the early stage of construction. According to the bottom elevation of the stiffening beam and the span of the beam, multiple temporary support poles 4 are vertically fixed at the corresponding positions of the scaffolding using special clips. All temporary support poles 4 are tied together with longitudinal and transverse connecting rods 5, so that the dispersed poles form an overall load-bearing frame structure, effectively distributing the load of the upper formwork, steel beams and concrete, avoiding deformation and sinking problems caused by localized stress concentration on the scaffolding, and ensuring the integrity and stability of the overall formwork system.

[0022] In this application, an assembly through hole is provided at the top of each temporary support pole 4, and the lifting mechanism 2 is fully positioned and installed inside the through hole to achieve vertical positioning. Specifically, the lifting mechanism 2 is composed of an internal threaded sleeve 21, an adjusting screw 22, and a top support plate 23. The internal threaded sleeve 21 is rotatably mounted at the top of the temporary support pole 4. The adjusting screw 22 is mounted inside the internal threaded sleeve 21 by threaded connection. The top support plate 23 is fixedly connected to the top of the adjusting screw 22. Furthermore, during construction, workers can rotate the internal threaded sleeve 21 in the forward or reverse direction to drive the adjusting screw 22 to rise and fall vertically, thereby precisely adjusting the support height of the top support plate 23 to adapt to the construction requirements of different beam bottom elevations and ensure that the beam bottom formwork 6 is laid flat and at a uniform elevation.

[0023] After the installation and commissioning of the formwork system and the supporting mechanism 2 are completed, the bottom beam formwork 6 is uniformly laid on the top of all the top support plates 23 to ensure that the joints of the bottom beam formwork 6 are tight, without misalignment or looseness. On the inner side of the bottom beam formwork 6, at the vertical projection position corresponding to the stiffening H-beam 7, multiple sets of built-in double T-shaped support mechanisms 3 are arranged at intervals.

[0024] The double-T support mechanism 3 of the present invention is an inverted double-T structure, which is prefabricated as a whole by the bottom horizontal connecting end 31 and the two vertical support ends 32 arranged symmetrically on the top. The overall structure has strong integrity and stable force. Preferably, the double-T-shaped support mechanism 3 is precast using high-strength hard concrete or fine stone concrete, and its own strength matches that of the cast-in-place beam concrete. It can be completely bonded to the later-cast concrete to form a whole. All double-T-shaped support mechanisms 3 are arranged inside the concrete pouring area enclosed by the beam formwork, completely hidden within the beam structure, without protruding from the formwork or exposed outside the beam, and do not belong to the traditional detachable external temporary frame structure.

[0025] The top of the double T-shaped support mechanism 3 is reserved with a matching slot and a clearance opening. After the rigid H-beam 7 is hoisted into place, the bottom of the steel section can be precisely engaged with the slot at the top of the double T-shaped support. Workers use studs to pass through the clearance opening to bolt and fix the bottom of the H-beam 7 to the double T-shaped support mechanism 3, realizing the pre-positioning support and limiting after the hoisting of the large-span steel beam, effectively preventing the steel beam from shifting, sinking, or shaking after hoisting, and greatly improving the installation accuracy of the steel beam.

[0026] After the H-beam 7 is positioned and fixed, the side formwork 8 of the beam body is vertically assembled on both sides of the bottom formwork 6. The side formwork 8 on both sides and the bottom formwork 6 of the beam body together form a casting cavity for the beam body. At the same time, end sealing formwork is installed at both ends of the casting cavity, so that the entire casting cavity forms a completely closed integral structure. Structurally, this ensures that the subsequent pouring of concrete can completely cover the main body of the H-beam 7, the ends of the steel section, and the corners, completely eliminating the problem of exposed ends and side walls of the H-beam 7, and avoiding the impact of steel structure corrosion on the durability of the beam body in the later stage.

[0027] As a further supplementary explanation, in this application, tie bolts 9 are installed between the side formwork 8 of the two beams. All tie bolts 9 are evenly arranged at equidistant intervals of 700mm along the span direction of the beam. By tightening the locking nuts at both ends of the tie bolts 9, the side formwork 8 is locked and fixed as a whole, which effectively resists the lateral expansion pressure generated during the concrete pouring process, prevents the formwork from bulging, running out, and deforming, and ensures that the cross-sectional dimensions of the formed beam are regular and uniform.

[0028] A construction method for a temporary support structure for stiffened beams includes the following construction steps: Step 1: Erect the overall scaffolding and formwork system on the construction site. According to the construction plan, position and lay out the lines. Securely fasten and fix multiple temporary support uprights 4 to the scaffolding frame with special clips. Install and fix the longitudinal and transverse connecting rods 5 so that the uprights and horizontal rods form an overall stable frame structure. Subsequently, the supporting mechanism 2 at the top of the upright is assembled, and the vertical height of the screw 22 is adjusted by rotating the internal threaded sleeve 21. The top support plate 23 is used to provide precise and stable support for the bottom formwork 6 of the beam, and the elevation and flatness of the bottom formwork 6 of the beam are checked.

[0029] Step 2: Fix and install multiple sets of prefabricated double-T-shaped built-in support mechanisms one by one at the corresponding positions on the inner side of the bottom formwork 6 of the beam, ensuring that the elevation of each set of support mechanisms is uniform, the spacing is even, and the force is aligned; Subsequently, the large-span stiff H-beam 7 was hoisted and placed smoothly on top of the double T-shaped support mechanism 3. The steel beam was pre-fixed by using studs to pass through the clearance opening of the support mechanism to complete the bolt connection limit between the steel beam and the support structure.

[0030] Step 3: Vertically install the side formwork 8 on both sides of the beam and seal the end formwork at both ends of the beam to completely enclose the overall casting cavity, ensuring that the entire H-beam 7 is inside the closed cavity, with no exposed or suspended ends of the steel section, thus meeting the conditions for fully enclosed casting.

[0031] Step 4: Arrange a tie bolt 9 every 700mm along the span of the beam, and tighten the bolts one by one to complete the overall formwork system reinforcement. Check the formwork joints, verticality, and cross-sectional dimensions to ensure that the formwork reinforcement is reliable.

[0032] Step 5: Conduct an overall review and correction of the hoisted large-span stiffened steel beams, level the beam elevation, correct the plane position, and confirm that the beams are not offset or tilted and that the supports are stable.

[0033] Step Six: Carry out a one-time continuous pouring operation of the beam concrete, pouring slowly in layers and vibrating to ensure that the concrete slurry flows fully and fills densely, so that the concrete completely covers the main body of H-beam 7, the ends of the beam and the double T-shaped support mechanism 3, without voids or gaps.

[0034] Step 7: After the concrete is poured, water curing is carried out according to the specifications. After the concrete strength reaches the requirements for formwork removal, the external temporary support poles 4, longitudinal and transverse connecting rods 5, top lifting mechanism 2, bottom beam formwork 6 and side formwork 8 are removed in sequence. The precast double T-shaped support mechanism 3 is permanently left inside the rigid beam concrete, forming an integral load-bearing structure with the beam body. It does not need to be removed, and the construction of the overall rigid beam is completed.

[0035] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0036] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present application, based on the technical solution and concept of the present application, should be covered within the scope of protection of the present application.

Claims

1. A temporary support structure for stiffened beams, characterized in that, It includes an integrated support frame system (1), a lifting mechanism (2), and a double T-shaped support mechanism (3). The integrated support frame system (1) includes temporary support uprights (4) and longitudinal and transverse connecting rods (5). The temporary support uprights (4) are fixed to the scaffolding system as a whole by snap fasteners. The temporary support pole (4) is equipped with a liftable lifting mechanism (2) at the top, and the upper end of the lifting mechanism (2) supports the bottom template (6) of the beam. The inner side of the bottom template (6) of the beam is equipped with a built-in double T-shaped support mechanism (3), which is set at the bottom of the stiffening beam H-beam (7) to provide pre-positioned fixed-point support for the H-beam (7); By integrating the internal support and simultaneously encasing the H-beam (7) with concrete, the H-beam (7) is completely enclosed and not exposed, eliminating the need for subsequent frame removal.

2. The temporary support construction structure for stiffened beams according to claim 1, characterized in that: The temporary support pole (4) has an assembly through hole at its top, and the bottom end of the lifting mechanism (2) is limited and assembled inside the through hole.

3. The temporary support construction structure for stiffened beams according to claim 2, characterized in that: The lifting mechanism (2) includes an internal threaded sleeve (21), an adjusting screw (22), and a top support plate (23). The internal threaded sleeve (21) is rotatably mounted on the top of the upright. The adjusting screw (22) is threaded into the inside of the internal threaded sleeve (21). The top support plate (23) is fixed to the top of the adjusting screw (22).

4. The temporary support construction structure for stiffened beams according to claim 1, characterized in that: The built-in double-T support mechanism (3) is arranged inside the beam formwork and completely hidden within the concrete pouring area, and does not serve as an external temporary support frame.

5. The temporary support construction structure for stiffened beams according to claim 1, characterized in that: The top of the double T-shaped support mechanism (3) is provided with an adapter slot and a clearance opening, and the bottom of the H-shaped steel (7) is bolted to the double T-shaped support mechanism (3) by studs.

6. The temporary support construction structure for stiffened beams according to claim 1, characterized in that: Side formwork (8) is assembled on both sides of the beam. The side formwork (8) and the bottom formwork (6) of the beam together form a complete casting cavity. End sealing formwork is set at both ends of the casting cavity.

7. The temporary support construction structure for stiffened beams according to claim 6, characterized in that: Tie bolts (9) are inserted between the side formwork (8) on both sides of the beam. The tie bolts (9) are arranged at equal intervals along the span of the beam to lock and fix the side formwork (8) and resist the side pressure of the concrete.

8. The temporary support construction structure for stiffened beams according to claim 7, characterized in that: The spacing of the tie bolts (9) is set to 700mm.

9. The temporary support construction structure for stiffened beams according to claim 8, characterized in that: The double-T support mechanism (3) is integrally formed by the bottom horizontal connecting end (31) and the two vertical support ends (32) symmetrically arranged at the top, and the whole is in the shape of an inverted double-T structure. The double-T-shaped support mechanism (3) is made of high-strength hard concrete or fine stone concrete precast material.

10. A construction method for a temporary support structure for stiffened beams as described in any one of claims 1-9, characterized in that, The construction steps include the following: Step 1: Erect the scaffolding and formwork system as a whole, fix multiple temporary support poles (4) with buckles, and connect the longitudinal and transverse poles to form an overall frame; assemble the top support mechanism (2) of the poles, adjust the height of the screw rod (22), and the top support plate (23) accurately supports the bottom formwork of the beam (6). Step 2: Fix and install multiple sets of double T-shaped built-in support mechanisms inside the bottom formwork (6) of the beam, hoist the stiff H-beam (7) into place, and fix and limit it to the double T-shaped support mechanism (3) by bottom studs; Step 3: Install the formwork (8) on both sides of the beam and the end sealing formwork to form a completely closed casting cavity, ensuring that the H-beam (7) is located inside the cavity and has no exposed ends; Step 4: Arrange tie bolts (9) at intervals along the beam direction and tighten them to complete the overall formwork reinforcement; Step 5: Complete the overall verification, leveling, and fixing of the large-span stiffened steel beam; Step 6: Cast the beam concrete in one go, and the concrete completely encloses the main body and end positions of the H-beam (7); Step 7: After the concrete has cured and formed, remove the external formwork, the supporting mechanism (2) and the temporary uprights, and permanently bond the internal double-T support to the concrete of the beam.

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