Construction bearing device for large cantilever component of high-rise housing

Abstract

The utility model discloses a high-rise housing large-scale cantilever member construction bearing device which comprises a steel beam system used for mainly bearing, and the steel beam system comprises a steel beam embedded part and a cantilever steel beam which are embedded in a high-rise housing structural beam; the surface of the cantilever steel beam is connected with a steel pipe framed bent system, and the steel pipe framed bent system comprises a plurality of formwork erecting vertical rods arranged on the cantilever steel beam in a supported mode and horizontal cross rods connected with the formwork erecting vertical rods; a pull rod system and a load monitoring device are arranged at the cantilever end of the cantilever steel beam; and an external protection system is arranged outside the steel pipe framed bent system. The device solves the technical problems that in the prior art, a traditional overhanging type supporting frame is adopted, a main body structure is damaged, safety risks are large, construction loads of large overhanging components are difficult to bear, and a large number of turnover materials are occupied, is simple in structure, scientific and reasonable in design and convenient to use, and can effectively reduce the erecting height of a supporting frame body; turnover material occupation of the supporting frame is reduced, and using safety of the supporting frame is guaranteed through an automatic monitoring and alarming system.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a construction bearing device for large cantilever components of a high-rise residential building. Background Art

[0002] In order to meet aesthetic requirements, some buildings often have cantilevers on their roofs. In contemporary architecture, the scale of cantilevers is getting larger and larger, and the ways of application are increasing. It also plays an increasingly important role in creating architectural expression. In the existing construction method, the construction of cantilever components requires a formwork support system and an external scaffolding system for auxiliary construction.

[0003] Traditional cantilever scaffolding refers to the process of transferring steel sections into the wall and fixing them indoors through pre-buried pull rings and steel wire ropes. In the field of building design and construction, local cantilever structures such as cantilever beams and cantilever plates are often encountered. Since local cantilever structures such as cantilever beams and cantilever plates are high above the ground and have long cantilever lengths, if traditional cantilever support frames are used during construction, there are technical problems such as damage to the main structure, high material loss, high safety risks, difficulty in bearing the construction load of large cantilever components, and large occupation of turnover materials.

[0004] Therefore, it is necessary to design a construction bearing device for large cantilever components of high-rise residential buildings to solve the above problems. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a construction bearing device for large cantilever components of high-rise residential buildings, so as to reduce damage to the main structure, reduce safety risks, improve material recycling rate, and reduce the occupancy of supporting frame turnover materials while ensuring the reliability of the bearing device.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a construction bearing device for large cantilever components of high-rise residential buildings, including a steel beam system for the main bearing function, the steel beam system includes steel beam embedded parts embedded in the structural beams of the high-rise residential buildings and cantilever steel beams; a steel pipe rack system is connected to the surface of the cantilever steel beam, the steel pipe rack system includes a plurality of formwork uprights supported on the cantilever steel beam and horizontal cross bars connecting the formwork uprights; a pull rod system and a load monitoring device are arranged at the cantilever end of the cantilever steel beam; an external protection system is arranged on the outside of the steel pipe rack system.

[0007] Furthermore, in the steel beam system, the embedded parts use sleeves containing square nuts, and stud bolts are installed after pouring is completed. The cantilever I-beam is a cantilever steel beam, on which a base steel plate is welded at the fixed end and holes are opened on the surface; lug plates are welded on the upper part of the cantilever steel beam, and the number of lug plates is consistent with the number of diagonal tie rod systems. The number of diagonal tie rod systems is determined according to the cantilever length and load; the embedded parts are connected to the cantilever steel beam by high-strength stud bolts and the base steel plate, thereby forming a steel beam system.

[0008] Furthermore, the device also includes a structural inner wall connection system, which includes a connecting cross bar and an internal building formwork, wherein the connecting cross bar passes through the window opening to connect the steel pipe rack with the internal building formwork.

[0009] Furthermore, the steel pipe rack system includes formwork supporting poles and horizontal cross bars, wherein the formwork supporting poles are connected to the steel beam system through movable locating pins, bolts are used to fix the poles to prevent slippage, and the horizontal cross bars are arranged according to the load design requirements. The first cross bar is 200 mm high from the steel beam, and the remaining horizontal cross bars are reasonably arranged on the premise of meeting the step requirements.

[0010] Preferably, the external protection system includes guardrails, safety nets and wooden footboards to prevent falling objects located on the outside of the steel pipe frame system; the spacing between the horizontal bars of the guardrails is not more than 600mm, the safety net is sealed on the inside of the guardrails and firmly fixed, a green dense mesh is used, and a steel mesh is added on the outside of the frame to strengthen the protection and ensure construction safety; formwork and wooden beams are used to close the floor and external frame at the base of the steel pipe frame and the range from the inner vertical pole to the edge of the structure, and a 180mm high footboard is provided.

[0011] Preferably, the tie rod system includes a tie rod embedded part embedded in the first concrete structure, the tie rod embedded part is connected to one end of tie rod 1, and the other end of tie rod 1 is connected to tie rod 2 connected to the cantilever end of the cantilever steel beam.

[0012] Preferably, the load monitoring device comprises a closed adjustable basket tube, and the first pull rod and the second pull rod are connected by the closed adjustable basket tube.

[0013] Furthermore, the tie rod 1, the tie rod 2, the adjustable basket tube and the lug plate form a group of the oblique tie rod system; multiple groups of such oblique tie rod systems can be provided.

[0014] Furthermore, the adjustable basket tube includes an external pipe fitting, and the inner walls at both ends of the pipe fitting are threadedly connected to the external threads at the ends of the pull rod one and the pull rod two by opening internal threads. The internal threads at both ends of the pipe fitting are in opposite directions, and the feed amount of the rods at both ends is simultaneously extended or shortened when rotating.

[0015] Furthermore, the inner wall of the adjustable basket tube is provided with a KYOWA brand KFGS-3-350-C1-11 strain gauge for an extensometer, the strain gauge is electrically connected to the 80C51 single-chip microprocessor, the microprocessor is electrically connected to the sound and light alarm and the power supply, the microprocessor and the sound and light alarm and the power supply are integrated in a control box, and the control box is tied to the outside of the adjustable basket tube; the strain gauge detects the tensile condition of the tube, and issues an alarm when the stress is too large, thereby achieving stress adjustment of the inclined tie rod system by adjusting the feed amount of the threaded connection.

[0016] Preferably, an anchor plate is welded at one end of the cantilever steel beam and connected to the steel beam embedded part, the steel beam embedded part is embedded in the second concrete structure, and the second concrete structure is lower than the first concrete structure; a lug plate is welded on the surface of the cantilever steel beam and connected to the second pull rod.

[0017] Preferably, the steel beam embedded parts are embedded in plastic sleeves containing high-strength bolts.

[0018] The utility model has the following technical effects:

[0019] 1. This device does not need to be cantilevered to set up scaffolding, the overall material consumption is less, the weight is reduced by more than 50%, and the use of steel is greatly saved; there is no need to extend the cantilevered steel beam deep into the room, and indoor operations can be carried out at the same time without causing any impact on the work surface, construction period, etc.; the embedded parts of the steel beam do not need to be buried in the shear wall, and the tie rod anchor points do not need to be pre-embedded in the template. There is no need to make holes in the template, and there is no need to fill holes later, which effectively prevents the phenomenon of water seepage in the external wall and ensures the quality of the project;

[0020] 2. Compared with the traditional cantilever frame pre-embedded inclined rope ring, the traditional inclined rope pre-embedded ring cannot be recycled and needs to be cut on site when dismantled. The cantilever steel beam and inclined rod system in this application saves both labor and materials; it is easy to install during construction, which greatly saves labor costs;

[0021] 3. The utility model has a simple structure, scientific and reasonable design, and is easy to use. Compared with traditional cantilever scaffolding, it reduces damage to the main structure, reduces safety risks, improves material recycling rate, reduces the occupation of circulating materials of the support frame and ensures the safe use of the cantilever frame; the utility model adopts I-beams as the main load-bearing and tie rods as the auxiliary load-bearing. The tie rods can greatly reduce the bending moment of the fixed end of the I-beam. After the tie rods are tightened, the rigidity of the system can be greatly increased, which greatly reduces the circulating materials required for the utility model, saves materials and meets the requirements of large-span cantilever components with bearing capacity. At the same time, it further makes the basket pipe safe and reliable through intelligent closed adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the structure of the utility model during specific construction;

[0025] Explanation of the numbers in the figure: adjustable basket tube 1, tie rod one 2, tie rod two 3, tie rod embedded part 4, lug plate 5, cantilever steel beam 6, anchor plate 7, steel beam embedded part 8, first concrete structure 9, second concrete structure 10, steel pipe rack system 11, external protection system 12, diagonal tie rod system 13. DETAILED DESCRIPTION

[0026] like Figure 1~Figure 2 As shown, a construction bearing device for large cantilever components of high-rise residential buildings includes a steel beam system for the main bearing function, the steel beam system includes steel beam embedded parts 8 embedded in the structural beams of the high-rise residential building and a cantilever steel beam 6; a steel pipe rack system 11 is connected to the surface of the cantilever steel beam 6, the steel pipe rack system 11 includes a plurality of formwork uprights supported on the cantilever steel beam 6 and horizontal cross bars connecting the formwork uprights; a pull rod system and a load monitoring device are arranged at the cantilever end of the cantilever steel beam 6; an external protection system 12 is arranged on the outside of the steel pipe rack system 11.

[0027] Furthermore, in the steel beam system, the embedded parts use sleeves containing square nuts, and stud bolts are installed after casting is completed. The cantilevered I-beam is the cantilevered steel beam 6, on which a base steel plate is welded at the fixed end and holes are opened on the surface; a lug plate 5 is welded on the upper part of the cantilevered steel beam 6, and the number of the lug plates 5 is consistent with the number of 13 diagonal tie rod systems, and the number of 13 diagonal tie rod systems is determined according to the cantilever length and load; the embedded parts are connected to the cantilevered steel beam 6 by high-strength stud bolts and the base steel plate, thereby forming a steel beam system.

[0028] Furthermore, the device also includes a structural inner wall connection system, which includes a connecting cross bar and an internal building formwork, wherein the connecting cross bar passes through the window opening to connect the steel pipe rack with the internal building formwork.

[0029] Furthermore, the steel pipe rack system 11 includes formwork supporting uprights and horizontal cross bars, wherein the formwork supporting uprights are connected to the steel beam system via movable positioning pins, bolts are used to fix the uprights to prevent slippage, and the horizontal cross bars are arranged according to the load design requirements. The first cross bar is 200 mm high from the steel beam, and the remaining horizontal cross bars are reasonably arranged on the premise of meeting the step requirements.

[0030] Preferably, the external protection system 12 includes a guardrail, a safety net and a wooden footboard to prevent falling objects located on the outside of the steel pipe rack system 11; the spacing between the horizontal bars of the guardrail is not more than 600mm, the safety net is sealed on the inside of the guardrail and firmly fixed, a green dense mesh is used, and a steel mesh is added on the outside of the rack to strengthen the protection and ensure construction safety; formwork and wooden beams are used to close the floor and the external frame at the base of the steel pipe rack and the range from the inner vertical pole to the edge of the structure, and a 180mm high footboard is provided.

[0031] Preferably, the tie rod system includes a tie rod embedded part 4 embedded in the first concrete structure 9, the tie rod embedded part 4 is connected to one end of the tie rod 1 2, and the other end of the tie rod 1 2 is connected to the tie rod 2 3 connected to the cantilever end of the cantilever steel beam 6.

[0032] Preferably, the load monitoring device comprises a closed adjustable basket tube 1 , and the pull rod 1 2 and the pull rod 2 3 are connected via the closed adjustable basket tube 1 .

[0033] Furthermore, the tie rod 1 2 , the tie rod 2 3 , the adjustable basket tube 1 and the lug plate 5 form a group of the inclined tie rod system 13 ; multiple groups of such inclined tie rod systems 13 may be provided.

[0034] Furthermore, the adjustable basket tube 1 includes an external pipe fitting, and the inner walls at both ends of the pipe fitting are threadedly connected to the external threads at the ends of the pull rod 1 2 and the pull rod 2 3 by opening internal threads. The internal threads at both ends of the pipe fitting are in opposite directions, and the feed amount of the rods at both ends is simultaneously extended or shortened when rotating.

[0035] Furthermore, the inner wall of the adjustable basket tube 1 is provided with a KYOWA brand KFGS-3-350-C1-11 strain gauge for an extensometer, the strain gauge is electrically connected to the 80C51 single-chip microprocessor, the microprocessor is electrically connected to the sound and light alarm and the power supply, the microprocessor and the sound and light alarm and the power supply are integrated in a control box, and the control box is tied to the outside of the adjustable basket tube 1; the strain gauge detects the tensile condition of the pipe fitting, and issues an alarm when the stress is too large, thereby achieving stress adjustment of the inclined tie rod system 13 by adjusting the feed amount of the threaded connection.

[0036] Preferably, an anchor plate 7 is welded at one end of the cantilever steel beam 6 and connected to the steel beam embedded part 8, the steel beam embedded part 8 is embedded inside the second concrete structure 10, and the second concrete structure 10 is lower than the first concrete structure 9; a lug plate 5 is welded on the surface of the cantilever steel beam 6 and connected to the pull rod 2 3.

[0037] Preferably, the steel beam embedded part 8 adopts a pre-embedded plastic sleeve containing high-strength bolts.

[0038] The working principle of the utility model is as follows:

[0039] When implementing:

[0040] The first step is to install the embedded parts. After the reinforcement of the cantilever floor side beam or shear wall structure is tied and before the concrete is poured, a horizontal line is drawn from the floor elevation minus 0.14, and the position of the embedded bolts is checked against the steel layout drawing; after the position is accurate, holes are punched on the outer template, and the sleeve is fixed to the outer template with a screw, and the outer butterfly nut is tightened to prevent the embedded sleeve from loosening during concrete pouring; the embedded sleeve should be accurately positioned in strict accordance with the spacing required by the construction plan (≤1.4m), and the horizontal spacing deviation is controlled within 10mm, and the vertical spacing deviation is controlled within 3mm. The buried height of the sleeve is 140mm below the floor slab elevation.

[0041] The second step is to process the steel beam system. At one end of the steel section after cutting, a pre-processed open hole attachment steel plate is welded. The connecting holes are two elliptical ones, which are mainly used for adjustment. In addition, a triangular supporting steel plate is added to enhance the compression resistance and firmness. Then, the position of the upper pulling point of the steel section is determined according to calculation, and the lug steel plate is welded at this position, and connected to the lug plate 5 at the end of the pull rod with bolts. According to the positioning of the vertical pole, a 100-150mm long, Φ32mm movable positioning pin is installed at the vertical pole position on the upper surface of the steel main beam or the longitudinal connecting beam as the steel pipe insertion point, and the vertical pole is sleeved outside it to prevent the vertical pole from slipping.

[0042] The third step is to set up the tie rod system. Two steel tie rods are connected to the automatically adjustable basket tube at one end with an arched wire. The entrances at both ends of the middle connecting tube are arched into positive and negative wires. The two steel tie rods are screwed into the middle connecting tube at the same time. The length of the connecting wire is ≥30mm. The pull rod load changes can be monitored in the automatically adjustable basket tube, and the pull rod length can be automatically adjusted to ensure that the load borne by the present invention is evenly distributed and avoid stress concentration.

[0043] The fourth step is the installation of the steel beam system. After the outer formwork of the outer wall beam or wall is removed and the concrete strength reaches 5Mpa, the stud screws are installed. When the concrete strength is ≥15Mpa, the steel beam system is installed. The installation method of the cantilevered steel beam 6: The steel beam system is ≤2m, and two people cooperate to install it. One person carries the steel beam on his shoulders, and one person straightens and aligns the anchor bolts and tightens them with nuts. The tightening should be completed before the formwork is erected. The steel beam system is greater than 2m or the steel structure with a weight greater than 50KG is hoisted by a tower crane, one person straightens, and one person tightens the nuts. The initial tightening torque of the tightening must reach 30~35N·m. After the I-beam of this layer is installed and adjusted in place (the angle is adjusted in place and locked, and the gap with the concrete contact surface is filled with steel sheets), the final tightening torque must reach 70N·m, and the exposed threads of the screw meet the requirements. After all bolts are tightened and checked, the installation of the steel beam system is completed. The concrete strength must reach 100% before it can be used as the upper formwork support frame.

[0044] The fifth step is to install the tie rod system. When the outer wall and beam formwork of the upper structure of the cantilever layer are supported, the sleeve is embedded and fastened to the outer formwork. When the concrete strength of the upper cantilever layer is ≥20Mpa, the inclined tie rod system 13 is installed: the tie rod is equipped in the factory according to the designed length. If there is a slight error, the upper and lower tie rods can be screwed in (or out) at the same time on site to make the tie rod length just right. The upper and lower tie rods are inserted with axle pins, and the automatic adjustment basket pipe is screwed clockwise. The upper and lower tie rods are screwed into the intelligent closed adjustment basket pipe at the same time to shorten the tie rod length. At this time, the tie rod has the force-bearing function. After the tie rod is installed, it is better to shake it vigorously without swinging (the tightening torque must reach 20N·m) to unload the tie rod. After the installation is completed, turn on the automatic adjustment system to ensure safety and reliability.

[0045] The sixth step is the steel pipe rack system 11. The steel pipe rack system 11 includes formwork uprights and horizontal cross bars. The formwork uprights are connected to the steel beam system through movable locating pins and bolts are used to fix the uprights to prevent them from slipping. The horizontal cross bars are arranged according to the load design requirements. The first cross bar is 200mm high from the steel beam. The remaining horizontal cross bars are reasonably arranged on the premise of meeting the step requirements.

[0046] Step 7: The structural internal wall system and external protection system 12 are set up according to the specifications.

[0047] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A construction bearing device for large cantilever components of high-rise residential buildings, characterized by: The invention comprises a steel beam system, wherein the steel beam system comprises a steel beam embedded part (8) embedded in a high-rise residential structural beam and a cantilever steel beam (6); a steel pipe rack system (11) is connected to the surface of the cantilever steel beam (6), and the steel pipe rack system (11) comprises a plurality of formwork support poles supported on the cantilever steel beam (6) and horizontal cross bars connecting the formwork support poles; a pull rod system and a load monitoring device are arranged at the cantilever end of the cantilever steel beam (6); and an external protection system is arranged outside the steel pipe rack system.

2. A construction bearing device for large cantilevered components of a high-rise residential building according to claim 1, characterized in that: The external protection system includes a protective railing, a safety net and a wooden toeboard located outside the steel pipe rack system.

3. A construction bearing device for large cantilevered components of a high-rise residential building according to claim 1, characterized in that: The tie rod system comprises a tie rod embedded part (4) embedded in the first concrete structure (9), the tie rod embedded part (4) being connected to one end of tie rod one (2), and the other end of tie rod one (2) being connected to tie rod two (3) connected to the cantilevered end of a cantilever steel beam (6).

4. The large cantilever component construction bearing device for high-rise residential buildings according to claim 1 is characterized by: The load monitoring device comprises a closed adjustable basket tube (1), and the first pull rod (2) and the second pull rod (3) are connected via the closed adjustable basket tube (1).

5. The large cantilever component construction bearing device for high-rise residential buildings according to claim 1 is characterized by: An anchor plate (7) is welded to one end of the cantilever steel beam (6) and connected to a steel beam embedded part (8); the steel beam embedded part (8) is embedded in the second concrete structure (10); the second concrete structure (10) is lower than the first concrete structure (9); a lug plate (5) is welded to the surface of the cantilever steel beam (6) and connected to the second tie rod (3); the first tie rod (2), the second tie rod (3), the adjustable basket tube (1) and the lug plate (5) form a group of inclined tie rod systems, and multiple groups of inclined tie rod systems can be provided.

6. The large cantilever component construction bearing device for high-rise residential buildings according to claim 1 is characterized by: The steel beam embedded part (8) adopts a pre-embedded plastic sleeve containing high-strength bolts.

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