High-altitude coupling beam formwork structure and construction method thereof

Abstract

The invention discloses a high-altitude coupling beam formwork structure and a construction method thereof.The high-altitude coupling beam formwork structure comprises side formworks, a bottom formwork and a formwork supporting frame, the side formworks are fixedly connected to the formwork supporting frame and arranged at intervals, the two ends of the side formworks abut against wall bodies on the two sides respectively, the bottom formwork abuts against and seals the bottoms of the two side formworks, and the two ends of the bottom formwork abut against the wall bodies on the two sides; the formwork supporting frame comprises a plurality of vertical rods, a plurality of horizontal trusses and a supporting platform, the supporting platform is detachably and fixedly connected to the wall bodies on the two sides, the lower ends of the vertical rods are fixedly connected to the supporting platform, and the horizontal trusses are vertically and fixedly connected to the vertical rods at intervals. According to the formwork supporting structure, the cost is reduced, the construction period is shortened, and the construction risk is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of high-altitude continuous beam formwork, and particularly relates to a high-altitude continuous beam formwork structure and a construction method thereof. Background Technique

[0002] With the development of society, there are more and more high-rise buildings. While meeting the housing needs of urban residents, their design also plays an important role in constructing the urban environment and creating the urban image. Various novel designs emerge in an endless stream. On the premise of ensuring the structural stability and safety of high-rise buildings, designers design their facade shapes, adopt the method of large overhanging at high altitude, and form a unique style. The high-formwork construction of such large overhanging structures at high altitude generally has large spans, high heights, and high construction difficulties. Using traditional floor-standing scaffolds has the problems of large engineering quantities, complex force transmission paths, overly long construction periods, and high safety risks for the high scaffolds. Summary of the Invention

[0003] The technical problem to be solved by the invention is to provide a high-altitude continuous beam formwork structure and a construction method thereof, which can reduce the workload, lower the cost, shorten the construction period, and reduce the construction risk.

[0004] The technical solution adopted by the invention is: a high-altitude continuous beam formwork structure, including side formworks, a bottom formwork, and a formwork support frame. The side formworks are fixedly connected to the formwork support frame and are arranged at intervals. The two ends of the side formworks respectively abut against the two side walls. The bottom formwork abuts against and closes the bottoms of the two side formworks and its two ends abut against the two side walls. The formwork support frame includes multiple vertical rods, multiple horizontal trusses, and a support platform. The support platform is detachably fixedly connected to the two side walls. The lower ends of the multiple vertical rods are fixedly connected to the support platform. The multiple horizontal trusses are vertically and spacedly fixedly connected to the multiple vertical rods.

[0005] Further, the above-mentioned support platform includes multiple longitudinal support beams arranged at intervals transversely. The two ends of the multiple longitudinal support beams are respectively fixedly lapped on two end transverse support beams. The two ends of the two end transverse support beams are respectively fixedly lapped on two longitudinal double-end cantilever beams. The two longitudinal double-end cantilever beams respectively longitudinally pass through the longitudinal reserved holes on both sides of the wall and are locked with longitudinal wedges I. The bottom surface of the longitudinal reserved hole I is flush with the top surface of the first floor slab under the continuous beam.

[0006] Further, the above-mentioned support platform further includes multiple intermediate transverse support beams. The two ends of the multiple intermediate transverse support beams respectively transversely pass through the transverse reserved holes on both sides of the wall and are locked with transverse wedges I. The upper sides of the multiple intermediate transverse support beams are fixedly connected to the multiple longitudinal support beams.

[0007] Further, an inverted V-shaped diagonal brace is arranged at the bottom of each intermediate transverse support beam. The upper end of the diagonal brace is fixedly connected to the intermediate transverse support beam, and the lower end is fixedly connected to the embedded steel plate arranged on the wall surface.

[0008] Furthermore, the embedded steel plate is provided with anchor bars fixedly connected thereto, and the anchor bars are fixedly connected to the wall bars in the wall body.

[0009] Furthermore, the diagonal brace is fixedly welded to the embedded steel plate, and the embedded steel plate is fixedly connected with a limiting strip, and the limiting strip is located at the bottom of the welding point of the diagonal brace and the embedded steel plate and abuts against the diagonal brace.

[0010] Furthermore, two formwork skeletons are arranged on the outer sides of the two side formworks, and multiple rows of tie rods are vertically arranged at intervals between the two formwork skeletons.

[0011] Furthermore, the high-altitude continuous beam formwork structure further includes an operation platform installed at the position two floors below the continuous beam. The operation platform includes multiple I-beams, steel plates and end transverse I-beams. The steel plates are fixedly connected to the top surfaces of the multiple longitudinal I-beams. The two ends of the multiple longitudinal I-beams are lapped on the two end transverse I-beams, and the two end transverse I-beams are lapped on the two longitudinal double-headed cantilever I-beams. The two longitudinal double-headed cantilever I-beams respectively pass through the longitudinal reserved holes two on both sides of the wall body and are locked with longitudinal wedges two.

[0012] Furthermore, the operation platform further includes multiple intermediate transverse I-beams. The two ends of the multiple intermediate transverse I-beams respectively pass through the transverse reserved holes two on both sides of the wall body and are locked with wedges two. The upper sides of the multiple intermediate transverse I-beams are fixedly connected to the multiple longitudinal I-beams.

[0013] A construction method of a high-altitude continuous beam formwork structure includes the following steps: 1) Structural checking and treatment Calculate the load of the continuous beam and its own weight that the formwork support frame needs to bear. This load is transmitted to the concrete structural beams and shear walls on both sides of the wall through the longitudinal double-ended cantilever beams, transverse support beams and diagonal braces in the shape of an eight made of I-beams; 2) Reserved holes and embedded side wall steel plates When constructing to the second and first floors below the continuous beam, longitudinal reserved holes one, longitudinal reserved holes two, transverse reserved holes one and transverse reserved holes two are set on both sides of the wall. The longitudinal reserved holes one, longitudinal reserved holes two, transverse reserved holes one and transverse reserved holes two are respectively larger than the sizes of the longitudinal double-ended cantilever beams, intermediate transverse support beams, longitudinal double-headed cantilever I-beams and intermediate transverse I-beams. Before the concrete of both sides of the wall is poured, embedded steel plates should be set on the outer side of the wall. The embedded steel plates are installed simultaneously with the wall bars. The embedded steel plates should be provided with anchor bars connected to the wall bars, and the embedding positions should correspond to the upper and lower positions of the longitudinal support beams; 3) Erect the operation platform and set up safety protection on the operation platform After the concrete strength of the two side walls meets the requirements, longitudinal reserved holes 2 and transverse reserved holes 2 are set on the second layer under the coupling beam. The longitudinal reserved holes 2 longitudinally penetrate through the longitudinal double-headed cantilever I-beams to serve as the longitudinal support beams of the operation platform. The transverse reserved holes 2 horizontally pass through the intermediate transverse I-beams and are erected in cooperation with the end transverse I-beams to serve as the transverse support beams of the operation platform. After the longitudinal and transverse I-beams are erected, longitudinal wedges 2 are used to tightly plug and clamp the orifice gaps of the longitudinal reserved holes 2, and transverse wedges 2 are used to tightly plug and clamp the orifice gaps of the transverse reserved holes 2. Steel plates are laid on the longitudinal I-beams. After the steel plates are spot-welded and fixed to the longitudinal I-beams, they serve as the operation platform. 4) Erection of the longitudinal support beam body of the I-beam Two I-beams longitudinally penetrate through the longitudinal reserved holes 1 on both sides of the first floor under the coupling beam to serve as the two longitudinal support beams for bearing, and multiple I-beams horizontally penetrate through the transverse reserved holes 1 on both sides of the first floor under the coupling beam to serve as the two intermediate transverse support beams for bearing. Two end transverse support beams are fixedly welded to the two ends of the two longitudinal support beams. Connecting plates are welded to the upper surfaces of the intermediate transverse support beams and the end transverse support beams to form a support platform. The gaps between the longitudinal support beams and the longitudinal reserved holes 1 are clamped tightly with longitudinal wedges 1, and the gaps between the intermediate transverse support beams and the transverse reserved holes 2 are clamped tightly with transverse wedges 2. 5) Welding of the inclined braces in the shape of an eight Angle steels are used as the inclined braces in the shape of an eight. According to the angles between the angle steels and the end transverse support beams and the intermediate transverse support beams made of I-beams and the two side walls, the two ends of the angle steels are respectively cut into a horizontal plane and a vertical plane. The vertical plane is welded to the embedded steel plates on the two side walls as the force-bearing fulcrums. A φ10 round steel is horizontally welded below the fulcrum as a limiting bar. The horizontal plane is welded to the bottom of the longitudinal support beam of the I-beam; Welding shall ensure the welding quality. After welding is completed, the welding quality shall be comprehensively inspected. When it does not meet the requirements, repair welding shall be carried out. 6) Erection of the support system The vertical poles are installed on the longitudinal support beams of the I-beams. The feet of the vertical poles are fixed by spot welding or vertical steel nails are welded on the I-beams to anchor the vertical poles. The transverse and longitudinal spacings of the vertical poles are determined according to the force calculation. The vertical poles are fixed by horizontal trusses composed of multiple transverse or longitudinal additional horizontal bars. 5) Formwork installation According to the measured elevation of the coupling beam position, the vertical poles are erected to the bottom of the coupling beam. The wooden formwork is assembled according to the design dimensions of the coupling beam. First, the bottom formwork is assembled, and then the side formwork on one side is assembled. After the steel bars of the coupling beam are tied, the side formwork on the other side is assembled. The formwork is reinforced by using tie rods and the back ribs composed of formwork skeletons. The two side formworks are also fixed by using the reinforcing wooden boards arranged at intervals at the top, and the formwork dimensions are checked. 8) Construction of the cast-in-place concrete members After the steel bars and formwork of the connecting beam have been accepted, concrete pouring will be carried out. The concrete pouring is carried out by using a concrete hopper lifted by a tower crane. The pouring of the connecting beam is carried out in two layers. The pouring height of each time is not more than 50cm. The pouring of the lower layer of concrete is completed before the initial setting of each layer of concrete. During the pouring process, the formwork and support inspection shall be strengthened; 9) Frame dismantling After the construction of the connecting beam is completed and the concrete strength meets the requirements of demolding strength, the frame of the formwork support frame is dismantled. The principle of dismantling the frame of the formwork support frame is to dismantle the support first and then the support later, and dismantle the support later first; the connecting beam formwork is dismantled by first dismantling the side formwork and then the bottom formwork. After all the connecting beam formwork is dismantled, the vertical poles made of steel pipes are dismantled from top to bottom, and then the diagonal braces made of angle steel are dismantled, and the support plates and longitudinal support beams, end transverse support beams, middle transverse support beams and longitudinal double-end cantilever beams are dismantled, and finally the operating platform is dismantled. Finally, the steel plates, longitudinal I-beams and transverse I-beams of the operating platform are dismantled, the middle transverse I-beams are pulled out from the transverse reserved hole two, and the longitudinal double-headed cantilever I-beams are pulled out from the longitudinal reserved hole two. When the dismantling is completed, the longitudinal reserved hole one, the longitudinal reserved hole two, the transverse reserved hole one and the transverse reserved hole two are sealed with micro-expansion concrete that is one grade higher than the original concrete of the wall.

[0014] Compared with the prior art, the effects of the present invention are as follows: (1) Compared with the traditional full-floor support, the typical support for high-altitude connecting beams is a suspended high-support formwork system, which can make full use of the bearing capacity of the building structure itself, save the amount of foundation reinforcement materials and scaffolding, and the steel recycling rate of the support and I-beam platform is high, which is economical and reasonable. The use of detachable formwork support frames can greatly reduce the amount of work, reduce costs, shorten construction period, and have high safety. Especially for 31-story high-rise buildings, its benefits are significant; (2) The longitudinal double-end cantilever beam and the middle transverse support beam are installed by using the longitudinal reserved hole 1 and the transverse reserved hole 1 respectively. The installation and removal are convenient and quick, and the support is stable and reliable. The skeleton of the support platform composed of the longitudinal double-end cantilever beam, the middle transverse support beam, the longitudinal support beam and the end transverse support beam has good support strength and rigidity, high support stability, and can ensure the stable casting of the connecting beam, and avoid sinking, which will lead to poor reliability of the connection with the walls on both sides; (3) The eight-shaped angle steel brace can play a role in reinforcing the longitudinal support beam. By setting the embedded steel plate on the wall surface and welding it to the brace, the support point on the wall surface is more stable and the connection is more reliable, avoiding damage to the wall surface and causing the connection point to fall off; (4) Anchor steel bars are set on the embedded steel plates to improve the stability and reliability of the connection between the embedded steel plates and the wall surface, avoid sliding due to excessive force, and improve the support reliability of the diagonal braces; (5) Setting limit strips can prevent the diagonal brace from sliding down after being welded loose, thus improving the connection reliability; (6) Set up the formwork skeleton and tie rods, which can avoid the formwork bursting and improve the stability and reliability of formwork pouring; (7) Set up an operation platform to facilitate the erection of the support platform and the formwork. Insert the I-beam into the second reserved hole and lock it. The platform can be built conveniently and quickly with low cost; (8) The force of the inclined strut and the support platform is clear. The force-bearing nodes can be clearly known and strengthened through software calculation. Most of the node processes are embedded and welded. The process is simple, easy to inspect and manage, and safe and reliable; (9) Through the first reserved hole in the wall and the embedded steel plate as the force-bearing support system of the support platform, the longitudinal support beam of the I-beam is convenient to install. Use angle steel as the inclined strut. The welding is convenient and fast. It effectively transfers the force of the upper support system (formwork support frame) to the main structure of the wall. The support steel platform transforms the floor-standing high formwork into a common formwork, avoiding a large investment in steel pipe scaffolds, reducing the labor intensity, and occupying a small site, which is convenient for three-dimensional cross-operation. Description of the Drawings

[0015] Figure 1 It is a front view structure schematic diagram of a high-altitude continuous beam formwork structure; Figure 2 It is a structure schematic diagram of the connection between the support platform and the wall; Figure 3 It is a structure schematic diagram of the connection between the operation platform and the wall; Figure 4 It is a structure schematic diagram of the layout of the first cross brace; Figure 5 It is a structure schematic diagram of the layout of the second cross brace; Figure 6 It is a top view structure schematic diagram of the specific construction site; Figure 7 It is a flow chart of the construction method for high-altitude continuous beams. Detailed Embodiment

[0016] The present invention will be further explained below in conjunction with the drawings of the specification, so as to be better understood by those skilled in the art.

[0017] Embodiment 1: As Figures 1-6As shown in the figure, a formwork structure for high-altitude continuous beams is provided for the construction of continuous beams in high-rise buildings. The specific structure includes side formworks 1, bottom formwork 2, and formwork support frames 3. The side formworks 1 are fixedly connected to the formwork support frames 3 and are arranged at intervals. The two ends of the side formworks 1 respectively abut against the two side walls 4. The bottom formwork 2 abuts against and closes the bottom of the two side formworks 1 and its two ends abut against the two side walls 4. The formwork support frame 3 includes multiple vertical poles 301, multiple horizontal trusses 302, and a support platform 303. The support platform 303 is detachably and fixedly connected to the two side walls 4. The lower ends of the multiple vertical poles 301 are fixedly connected to the support platform 303. The multiple horizontal trusses 302 are vertically and spacedly fixedly connected to the multiple vertical poles 301. Compared with the traditional full hall scaffold, the typical scaffold for high-altitude continuous beams is a suspended high formwork system, which can make full use of the bearing capacity of the building structure itself, save the foundation reinforcement materials and the amount of scaffolding, and has a high recycling rate of the steel in the support and the steel beam platform, which is economical and reasonable. The first cross braces 309 are provided on the horizontal trusses 302 at the bottommost and topmost layers. The second cross braces 310 are provided on the two side elevations and the middle elevation of the vertical poles 301 between the two walls 4. The use of cross braces can further strengthen the support stability and reliability of the formwork support frame.

[0018] Specifically, the support platform 303 includes multiple longitudinal support beams 304 arranged horizontally at intervals. The two ends of the multiple longitudinal support beams 304 are respectively fixedly lapped on two end transverse support beams 305. The two ends of the two end transverse support beams 305 are respectively fixedly lapped on two longitudinal double-end cantilever beams 306. The two longitudinal double-end cantilever beams 306 respectively longitudinally pass through the longitudinal reserved holes 401 on the two side walls 4 and are locked with longitudinal wedges 402. The bottom surface of the longitudinal reserved hole 401 is flush with the top surface of the first floor slab under the continuous beam. The support platform also includes multiple intermediate transverse support beams 308. The two ends of the multiple intermediate transverse support beams 308 respectively horizontally pass through the transverse reserved holes 407 on the two side walls 4 and are locked with transverse wedges 408. The upper sides of the multiple intermediate transverse support beams 308 are fixedly connected to the multiple longitudinal support beams 304. The longitudinal reserved holes 401 and the transverse reserved holes 407 are respectively used for the installation of the longitudinal double-end cantilever beams and the intermediate transverse support beams, and the installation and removal are convenient and fast, the support is stable and reliable. The support platform framework composed of the longitudinal double-end cantilever beams, the intermediate transverse support beams, the longitudinal support beams, and the end transverse support beams has good support strength and rigidity and high support stability, which can ensure the stable pouring of the continuous beam and avoid the reduction of the reliability of the connection with the two side walls due to subsidence.

[0019] In order to further improve the reliability of the support platform, an inverted V-shaped brace 307 is provided at the bottom of each intermediate transverse support beam 308. The upper end of the brace 307 is fixedly connected to the intermediate transverse support beam 308, and the lower end is fixedly connected to a pre-embedded steel plate 403 provided on the surface of the wall 4. The inverted V-shaped angle steel brace can reinforce the longitudinal support beam. By setting the pre-embedded steel plate on the wall surface and welding it to the brace, the support points on the wall surface are more stable and the connection is more reliable, avoiding detachment caused by damage to the wall surface.

[0020] In order to further improve the reliability of the brace, the pre-embedded steel plate 403 is provided with anchor bars fixedly connected thereto, and the anchor bars are fixedly connected to the wall bars in the wall 4. The pre-embedded steel plate is provided with anchor bars to improve the stability and reliability of the connection between the pre-embedded steel plate and the wall surface, avoiding sliding due to excessive force and improving the support reliability of the brace.

[0021] In order to further improve the reliability of the brace, the brace 307 is fixedly connected to the pre-embedded steel plate 403 by welding. The pre-embedded steel plate 403 is fixedly connected with a limiting strip 404. The limiting strip 404 is located at the bottom of the welding point between the brace 307 and the pre-embedded steel plate 403 and abuts against the brace 305. The setting of the limiting strip can prevent the brace from sliding down after the welding becomes loose, improving the connection reliability.

[0022] In order to improve the pouring stability and reliability of the formwork, two formwork skeletons 7 are provided on the outer sides of the two side formworks, and multiple rows of tie rods 5 are arranged vertically and spaced between the two formwork skeletons 7. The setting of the formwork skeletons and tie rods can prevent the side formworks from bursting and improve the pouring stability and reliability of the formwork.

[0023] In order to facilitate the construction of the formwork support system, a high-altitude connecting beam formwork structure also includes an operating platform 6 installed at a position two floors below the connecting beam, the operating platform 6 includes multiple I-beams 601, steel plates 602 and end transverse I-beams 603, the steel plates 602 are fixedly connected to the top surfaces of the multiple longitudinal I-beams 601, the two ends of the multiple longitudinal I-beams 601 are overlapped on the two end transverse I-beams 603, the two end transverse I-beams 603 are overlapped on the two longitudinal double-headed cantilever I-beams 604, the two longitudinal double-headed cantilever I-beams 604 are respectively movable through the longitudinal reserved holes 405 of the walls 4 on both sides and are locked with longitudinal wedges 406 The operating platform also includes a plurality of intermediate transverse I-beams 605, the two ends of which pass through the transverse reserved holes 409 of the two side walls 4 and are locked with wedges 410, and the upper sides of the plurality of intermediate transverse I-beams 605 are fixedly connected with the plurality of longitudinal I-beams 601; the operating platform is provided to facilitate the erection of the support platform and the erection and removal of the template, and the I-beams are inserted into the longitudinal reserved holes 2 and the transverse reserved holes 2 and locked with wedges, and the steel plates are welded to the longitudinal I-beams, so that the platform can be built conveniently and quickly with low cost, and the reserved holes are convenient and quick to assemble and disassemble, and the platform support is stable and reliable.

[0024] The operating principle is to use the reserved holes in the original wall structure to cantilever the I-beam and lay the steel plate as an operating platform, and embed the steel plates in the walls on both sides as the load-bearing supports of the typical eight-shaped support system, supporting the main beam and connecting beam at the bottom of the entire load-bearing support, and becoming the load-bearing foundation of the upper support system.

[0025] Example 2: Figure 7 As shown, a construction method of a high-altitude connecting beam template structure includes the following steps: 1) Structural verification and processing Calculate the loads of the connecting beam and its own loads that the formwork support frame needs to bear. The loads are transmitted to the concrete structural beams and shear walls of the walls on both sides through the longitudinal double-end cantilever beams made of I-beams, transverse support beams and S-shaped diagonal braces; 2) Reserve openings and embed side wall steel plates When constructing to the second and first floors below the connecting beam, longitudinal reserved holes 1, 2, 1 and 2 are set on the walls on both sides. The longitudinal reserved holes 1, 2, 1 and 2 are larger than the longitudinal double-end cantilever beam, the middle transverse support beam, the longitudinal double-end cantilever I-beam and the middle transverse I-beam, respectively. Before pouring concrete on the walls on both sides, embedded steel plates should be set on the outside of the walls. The embedded steel plates and the wall reinforcements are installed at the same time. The embedded steel plates should be connected to the wall reinforcements with anchor bars, and the embedded positions should correspond to the longitudinal support beams above and below. 3) Set up an operating platform and install safety protection (railings) on the operating platform After the concrete strength of the two side walls meets the requirements, longitudinal reserved hole two and transverse reserved hole two are set on the second layer under the coupling beam. Longitudinal reserved hole two longitudinally penetrates through the longitudinal double-headed cantilever steel I-beam to serve as the longitudinal support beam of the operation platform, and transverse reserved hole two horizontally penetrates through the middle transverse steel I-beam and is erected in cooperation with the end transverse steel I-beam to serve as the transverse support beam of the operation platform. After the erection of the longitudinal and transverse steel I-beams is completed, longitudinal wedge two (both wedge one and wedge two are made of wooden wedges) is used to tightly block and clamp the orifice gap of longitudinal reserved hole two, and transverse wedge two is used to tightly block and clamp the orifice gap of transverse reserved hole two. Steel plates are laid on the longitudinal steel I-beams. After the steel plates are spot-welded and fixed to the longitudinal steel I-beams, they serve as the operation platform; 4) Erection of the longitudinal support beam body of the steel I-beam Two steel I-beams longitudinally penetrate through the longitudinal reserved hole one on both sides of the first floor under the coupling beam to serve as the two longitudinal support beams for bearing, and multiple steel I-beams horizontally penetrate through the transverse reserved hole one on both sides of the first floor under the coupling beam to serve as the two middle transverse support beams for bearing. Two end transverse support beams are fixedly welded at both ends of the two longitudinal support beams. Connecting plates are welded on the upper surfaces of the middle transverse support beams and the end transverse support beams to form a support platform. The gap between the longitudinal support beam and the longitudinal reserved hole one is clamped tightly with longitudinal wedge one, and the gap between the middle transverse support beam and the transverse reserved hole two is clamped tightly with transverse wedge two; 5) Welding of the diagonal braces Angle steel is used as the diagonal braces. According to the angles between the angle steel and the longitudinal support beam of the steel I-beam and the wall, the two ends of the angle steel are respectively cut into a horizontal plane and a vertical plane. The vertical plane is welded to the embedded steel plates on both sides of the wall as the force-bearing fulcrum. A φ10 round steel is horizontally welded below the fulcrum as a limiting bar to prevent the channel steel from pulling and cracking the weld after being stressed. The horizontal plane is welded to the bottom of the longitudinal support beam of the steel I-beam; The welding shall ensure the welding quality. After the welding is completed, the welding quality shall be comprehensively inspected. When it does not meet the requirements, repair welding shall be carried out; 6) Erection of the support system The vertical poles are installed on the longitudinal support beam of the steel I-beam. The feet of the vertical poles are fixed by spot welding or vertical steel nails are welded on the steel I-beam to anchor the vertical poles. The transverse and longitudinal spacings of the vertical poles are determined according to the stress calculation. The vertical poles are fixed by a horizontal truss composed of multiple transverse or longitudinal additional horizontal bars; 5) Formwork installation According to the measured elevation of the coupling beam position, the vertical poles are erected to the bottom of the coupling beam. The wooden formwork is assembled according to the design dimensions of the coupling beam. First, the bottom formwork is assembled, and then the side formwork on one side is assembled. After the steel bars of the coupling beam are tied, the side formwork on the other side is assembled. It is reinforced by using a backing strip composed of a tie rod and a formwork skeleton. The top ends of the two side formworks are also fixed by spaced reinforcing wooden boards, and the formwork dimensions are calibrated; 8) Construction of cast-in-place concrete components After the continuous beam steel bars and formworks have passed the acceptance inspection, concrete pouring is carried out. The concrete is poured using a tower crane to lift the concrete hopper. The continuous beam is poured in two layers, with the pouring height of each layer not exceeding 50 cm. The lower layer of concrete is poured before the initial setting of each layer of concrete. During the pouring process, the formwork and supports are inspected intensively to ensure the stability of the supports. 9) Removal of the framework After the construction of the continuous beam is completed and the concrete strength meets the formwork removal strength requirements, the framework of the formwork support is removed. The principle for removing the framework of the formwork support is to remove the supports that are installed first later and the supports that are installed later first. For the removal of the continuous beam formwork, the side formwork is removed first, and then the bottom formwork is removed. After all the continuous beam formwork is removed, the vertical poles made of steel pipes are removed from top to bottom, followed by the removal of the diagonal braces made of angle steel and the removal of the support plates, longitudinal support beams, end transverse support beams, intermediate transverse support beams, and longitudinal double-end cantilever beams. Finally, the operation platform is removed. Finally, the steel plates of the operation platform, longitudinal I-beams, and transverse I-beams are removed. The intermediate transverse I-beams are pulled out from the second transverse reserved hole, and the longitudinal double-end cantilever I-beams are pulled out from the second longitudinal reserved hole. After the removal is completed, the first longitudinal reserved hole, the second longitudinal reserved hole, the first transverse reserved hole, and the second transverse reserved hole are sealed with micro-expansion concrete that is one grade higher than the original concrete of the wall. During the process of removing the framework, the removed materials are transported in a timely manner, and it is strictly prohibited to stack too many materials on the framework.

[0026] The construction method of the present invention is applicable to the construction of high-altitude continuous beams. The construction operation is convenient, the construction speed is fast, the labor cost is reduced, the construction safety risks of high-altitude operations are effectively prevented, and the safety of high-altitude operations is ensured. During the construction process, through the reserved holes and embedded steel plates, it can be used in high-rise and super-high-rise buildings, is not restricted by the site and the height-width ratio of the supports, can carry out three-dimensional cross operations, saves the usage amount of turnover materials such as steel pipe scaffolds, supports, and fasteners, and reduces the usage period. Without the need to adopt a floor foundation, it can save the foundation hardening concrete. Taking the actual experimental construction of the continuous beams on the outer facades of Buildings 1-3, 31 floors in Phase I of a certain project as an example, the first longitudinal reserved hole and the second longitudinal reserved hole are located beside two elevator shafts. The construction period is 175 days. The cost items required for using a full hall support include the rental costs of steel pipe scaffolds and fasteners, which are approximately: 332,955 yuan; the cost of cushion concrete is 21,840 yuan; the cost of green nets is 6,550 yuan. Using the "typical" support cast-in-place construction method for high-altitude continuous beams, the cost items required include the amount of I-beams (rental) of 5,250; the amount of angle steel of 125,000; the amount of steel plates of 5,460 yuan; and the amount of steel wire ropes of 1,560 yuan. Therefore, the cost is effectively saved by 224,075 yuan, and the construction period can also be saved by 15-20 days. The on-site civilized construction is neat, and the safety construction is guaranteed.

[0027] After the construction is completed, the I-beams, angle steel, steel plates, etc. can be reused or disposed of as waste materials, and 79,212 yuan can be obtained.

[0028] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the spirit and principles of the present invention's design, various deformations and improvements made by those skilled in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A high-altitude connecting beam template structure, characterized in that: The invention comprises a side formwork (1), a bottom formwork (2) and a formwork support frame (3); the side formwork (1) is fixedly connected to the formwork support frame (3) and arranged at intervals; two ends of the side formwork (1) respectively abut against two side walls (4); the bottom formwork (2) abuts against and is closed at the bottom of the two side formworks (1) and two ends abut against the two side walls (4); the formwork support frame (3) comprises a plurality of vertical poles (301), a plurality of horizontal trusses (302) and a support platform (303); the support platform (303) is detachably fixedly connected to the two side walls (4); the lower ends of the plurality of vertical poles (301) are fixedly connected to the support platform (303); and the plurality of horizontal trusses (302) are vertically fixedly connected to the plurality of vertical poles (301) at intervals.

2. A high-altitude connecting beam template structure according to claim 1, characterized in that: The supporting platform (303) comprises a plurality of longitudinal support beams (304) arranged at intervals in a transverse direction, wherein the two ends of the plurality of longitudinal support beams (304) are respectively fixedly overlapped on two end transverse support beams (305), and the two ends of the two end transverse support beams (305) are respectively fixedly overlapped on two longitudinal double-end cantilever beams (306), and the two longitudinal double-end cantilever beams (306) are respectively movable longitudinally through longitudinal reserved holes (401) of the walls (4) on both sides and are locked by longitudinal wedges (402), and the bottom surface of the longitudinal reserved hole (401) is flush with the top surface of the first floor slab under the connecting beam.

3. A high-altitude connecting beam formwork structure according to claim 2, characterized in that: It also includes a plurality of intermediate transverse support beams (308), the two ends of which are movable transversely through transverse reserved holes (407) of the two side walls (4) and are locked with transverse wedges (408), and the upper sides of the plurality of intermediate transverse support beams (308) are fixedly connected to the plurality of longitudinal support beams (304).

4. A high-altitude connecting beam formwork structure according to claim 3, characterized in that: An eight-shaped diagonal brace (307) is provided at the bottom of each intermediate transverse support beam (308); the upper end of the diagonal brace (307) is fixedly connected to the intermediate transverse support beam (308), and the lower end of the diagonal brace (307) is fixedly connected to a pre-buried steel plate (403) provided on the surface of the wall (4).

5. The high-altitude connecting beam formwork structure according to claim 4 is characterized in that: The embedded steel plate (403) is provided with an anchoring steel bar fixedly connected thereto, and the anchoring steel bar is fixedly connected to the wall steel bar in the wall (4).

6. The high-altitude connecting beam formwork structure according to claim 4 is characterized in that: The diagonal brace (307) is welded and fixed to the embedded steel plate (403), and the embedded steel plate (403) is fixedly connected to the limiting strip (404). The limiting strip (404) is located at the bottom of the welding point between the diagonal brace (307) and the embedded steel plate (403) and abuts against the diagonal brace (307).

7. The high-altitude connecting beam formwork structure according to claim 1 is characterized in that: Two formwork frames (7) are arranged outside the two side formworks, and a plurality of rows of tension screws (5) are arranged vertically and spaced apart between the two formwork frames (7).

8. The high-altitude connecting beam formwork structure according to claim 3 is characterized in that: It also includes an operating platform (6) installed at a position two floors below the connecting beam, the operating platform (6) including a plurality of longitudinal I-beams (601), a steel plate (602) and an end transverse I-beam (603), the steel plate (602) being fixedly connected to the top surface of the plurality of longitudinal I-beams (601), the two ends of the plurality of longitudinal I-beams (601) being overlapped on two end transverse I-beams (603), the two end transverse I-beams (603) being overlapped on two longitudinal double-headed cantilever I-beams (604), the two longitudinal double-headed cantilever I-beams (604) being movably passed through the longitudinal reserved holes (405) of the two side walls (4) and being locked by longitudinal wedges (406).

9. The high-altitude connecting beam formwork structure according to claim 7, characterized in that: It also includes a plurality of middle transverse I-beams (605), the two ends of which respectively pass through the second transverse reserved holes (409) of the two side walls (4) and are locked with the second wedge (410), and the upper sides of the plurality of middle transverse I-beams (605) are fixedly connected to the plurality of longitudinal I-beams (601).

10. The construction method of a high-altitude connecting beam formwork structure according to claim 1, characterized in that: The method comprises the following steps: 1) Structural verification and processing Calculate the loads that the connecting beam and its own loads need to bear on the formwork support frame. The loads are transmitted to the concrete structural beams and shear walls of the walls on both sides through the longitudinal support beams made of I-beams and the eight-shaped diagonal braces; 2) Reserve openings and embed side wall steel plates When constructing to the second and first floors below the connecting beam, longitudinal reserved holes 1, 2, 1 and 2 are set on the walls on both sides. The longitudinal reserved holes 1, 2, 1 and 2 are larger than the longitudinal double-end cantilever beam, the middle transverse support beam, the longitudinal double-end cantilever I-beam and the middle transverse I-beam, respectively. Before pouring concrete on the walls on both sides, embedded steel plates should be set on the outside of the walls. The embedded steel plates and the wall reinforcements are installed at the same time. The embedded steel plates should be connected to the wall reinforcements with anchor bars, and the embedded positions should correspond to the longitudinal support beams above and below. 3) Set up an operating platform and install safety protection on the operating platform After the concrete strength of the walls on both sides meets the requirements, a longitudinal reserved hole 2 and a transverse reserved hole 2 are set in the second layer under the connecting beam. The longitudinal reserved hole 2 passes through the longitudinal double-head cantilever I-beam longitudinally to serve as the longitudinal support beam of the operating platform. The transverse reserved hole 2 passes through the middle transverse I-beam and is erected in conjunction with the end transverse I-beam to serve as the transverse support beam of the operating platform. After the longitudinal and transverse I-beams are erected, the longitudinal wedge 2 is used to plug and tighten the hole gap of the longitudinal reserved hole 2 and the transverse wedge 2 is used to plug and tighten the hole gap of the transverse reserved hole 2. A steel plate is laid on the longitudinal I-beam, and the steel plate and the longitudinal I-beam are spot-welded and fixed to serve as the operating platform. 4) Erection of I-beam longitudinal support beam Two I-beams are longitudinally passed through one of the longitudinal reserved holes of the walls on both sides of the first floor under the connecting beam as two longitudinal support beams that bear the load, and multiple I-beams are transversely passed through one of the transverse reserved holes of the walls on both sides of the first floor under the connecting beam as two intermediate transverse support beams that bear the load, two end transverse support beams are fixedly welded on both ends of the two longitudinal support beams, connecting plates are welded on the upper surfaces of the intermediate transverse support beams and the end transverse support beams to form a support platform, the gap between the longitudinal support beam and the longitudinal reserved hole one is clamped with a longitudinal wedge one, and the gap between the intermediate transverse support beam and the transverse reserved hole two is clamped with a transverse wedge two; 5) Welding the eight-shaped diagonal brace Angle steel is used as the eight-shaped diagonal brace. According to the angle between the end transverse support beam and the middle transverse support beam made of angle steel and I-beam and the two side walls, the two ends of the angle steel are cut into horizontal and vertical planes respectively. The vertical plane is welded to the embedded steel plate of the two side walls as the force fulcrum. φ10 round steel is welded horizontally below the fulcrum as a limit bar, and the horizontal plane is welded to the bottom of the longitudinal support beam of the I-beam. The welding quality should be guaranteed. After the welding is completed, the welding quality should be fully checked. If it does not meet the requirements, it should be repaired. 6) Installation of support system The vertical pole is installed on the longitudinal support beam of the I-beam. The legs of the vertical pole are fixed by spot welding or vertical steel nails are welded on the I-beam to anchor the vertical pole. The horizontal and vertical spacing of the vertical pole is determined according to the force calculation. The vertical pole is fixed by a horizontal truss composed of multiple horizontal or vertical additional horizontal rods. 5) Template installation Determine the elevation of the connecting beam position based on the measurement, erect the pole to the bottom of the connecting beam, assemble the wooden formwork according to the design size of the connecting beam, assemble the bottom formwork first, then assemble the side formwork on one side, complete the steel bar binding of the connecting beam, and then assemble the side formwork on the other side. Use the back ribs formed by the tension screw and the formwork frame to reinforce it. The tops of the two side formworks are also fixed with reinforced wooden boards arranged at intervals, and the formwork size is checked; 8) Construction of cast-in-place concrete components After the steel bars and formwork of the connecting beam have been accepted, concrete pouring will be carried out. The concrete pouring is carried out by using a concrete hopper lifted by a tower crane. The pouring of the connecting beam is carried out in two layers. The pouring height of each time is not more than 50cm. The pouring of the lower layer of concrete is completed before the initial setting of each layer of concrete. During the pouring process, the formwork and support inspection shall be strengthened; 9) Frame dismantling After the construction of the connecting beam is completed and the concrete strength meets the requirements of demolding strength, the frame of the formwork support frame is dismantled. The principle of dismantling the frame of the formwork support frame is to dismantle the support first and then the support later, and dismantle the support later first; the connecting beam formwork is dismantled by first dismantling the side formwork and then the bottom formwork. After all the connecting beam formwork is dismantled, the vertical poles made of steel pipes are dismantled from top to bottom, and then the diagonal braces made of angle steel are dismantled, and the support plates and longitudinal support beams, end transverse support beams, middle transverse support beams and longitudinal double-end cantilever beams are dismantled, and finally the operating platform is dismantled. Finally, the steel plates, longitudinal I-beams and transverse I-beams of the operating platform are dismantled, the middle transverse I-beams are pulled out from the transverse reserved hole two, and the longitudinal double-headed cantilever I-beams are pulled out from the longitudinal reserved hole two. When the dismantling is completed, the longitudinal reserved hole one, the longitudinal reserved hole two, the transverse reserved hole one and the transverse reserved hole two are sealed with micro-expansion concrete that is one grade higher than the original concrete of the wall.

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