Formwork supporting platform for high-altitude large-span suspended machine room framework

Abstract

The utility model relates to the technical field of building construction, in particular to a formwork supporting platform for a high-altitude large-span suspended machine room framework, which comprises a suspended structure, a roof structure and a top layer structure, formworks are arranged on the outer side face and the bottom face of the suspended structure, and a parapet wall is arranged on the upper surface of the roof structure. The upper surface of the roof structure is provided with a plurality of cantilever cross beams which are evenly distributed in the front-back direction, the tail section of each cantilever cross beam is fixed to the upper surface of the roof structure through a fixing piece, and the middle section of each cantilever cross beam is arranged on the parapet wall in a penetrating mode; the problems that according to common overhanging or suspension design in current high-rise buildings, in particular to large-span suspension structures which are overhung out of the outer wall of a main body structure and have the span larger than 8 meters and no supporting structures below, an existing full space supporting frame needs to be built layer by layer from the ground, the maximum height is limited to 30 meters, and the construction cost is low are solved. The device is not suitable for a structure with the height of hundreds of meters, and potential safety hazards exist when constructors work high above the ground.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building construction, in particular to a formwork platform for high-altitude large-span suspended machine room framework. BACKGROUND

[0002] At present, the outer facade of many high-rise buildings in China is designed as a cantilevered or suspended building shape, in order to meet the design intent of the building, the building shape between the roofs of adjacent elevator machine rooms is designed as a large-span structure that is connected, and some even have a span greater than 8m, the outer wall of the main structure is cantilevered, and there is no supporting structure under the large-span structure, which brings great difficulties to construction, both the construction quality and the construction safety of the structure need to be considered. When constructing such a high-altitude large-span suspended structure that cantilevers the outer wall of the main structure, the existing full-support frame has the following problems: first, it needs to be built layer by layer from the ground upwards, which not only consumes time and effort, but also has a maximum height limit of 30m according to the regulations, and when the suspended cantilevered structure is higher than 30m, even hundreds of meters high, the full-support frame has limitations; second, construction personnel need to work at a height of tens of meters or even hundreds of meters, and how to ensure the safety of the construction personnel is also a problem that needs to be solved urgently.

[0003] Therefore, it is necessary to invent a formwork platform for high-altitude large-span suspended machine room framework to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses in order to solve the cantilevered or suspended design that is common in current high-rise buildings, especially the large-span suspended structure that cantilevers the outer wall of the main structure and has a span greater than 8m and no supporting structure below, when constructing, the existing full-support frame needs to be built layer by layer from the ground, the maximum height is limited to 30m, and for structures that are hundreds of meters high, the full-support frame cannot be used, and there are safety hazards for construction personnel working at a high altitude. The utility model provides a formwork platform for high-altitude large-span suspended machine room framework.

[0005] The utility model is adopted with the following technical scheme:

[0006] A formwork platform for high-altitude large-span suspended machine room framework, comprising a suspended structure, a roof structure and a top layer structure, the outer side and bottom surface of the suspended structure are provided with a formwork, the upper surface of the roof structure is provided with a parapet wall, the upper surface of the roof structure is provided with a plurality of cantilevered cross beams that are evenly distributed along the front and back, the tail section of each cantilevered cross beam is fixed to the upper surface of the roof structure through a fixing piece, the middle section of each cantilevered cross beam is arranged through the parapet wall, and the head section of each cantilevered cross beam is cantilevered to the outer side of the parapet wall. The head sections of the plurality of cantilevered cross beams are collectively provided with a supporting scaffold, the formwork is arranged at the top end of the supporting scaffold, and the head end of each cantilevered cross beam is connected to the top layer structure through a diagonal brace.

[0007] Further, the fixing member comprises a U-shaped bolt and an angle steel, the lower part of the U-shaped bolt is embedded in the roof structure, the angle steel is provided with a mounting hole, the angle steel is mounted on the upper part of the U-shaped bolt through the mounting hole and the nut, and the tail end of the cantilever beam is clamped between the lower surface of the angle steel and the upper surface of the roof structure, and the wood wedge is clamped between the tail end of the cantilever beam and the U-shaped bolt.

[0008] Further, the cantilever beam is made of No. 20 I-shaped steel, and the spacing between the two adjacent cantilever beams is 1000mm.

[0009] Further, the inclined support 7 is made of No. 16 I-shaped steel.

[0010] Further, the upper end of each inclined support and the head end of the corresponding cantilever beam are connected by high-strength bolts, and the lower end of each inclined support is fixed to the top layer structure through a pre-embedded steel plate.

[0011] Further, the pre-embedded steel plate comprises a steel plate, four evenly distributed hook-shaped round steels are welded on one side of the steel plate, and the four hook-shaped round steels are embedded in the top layer structure, the other side of the steel plate is welded and fixed with the lower end of the corresponding inclined support, and the quality grade of the steel plate is Q235.

[0012] Further, the outer side of the support scaffold is provided with an outer scaffold, and the outer scaffold is fixed to the upper surface of the head section of the plurality of cantilever beams, and the outer scaffold is connected and fixed to the parapet wall through a wall connecting member.

[0013] Further, the length of the middle section and the tail section of each cantilever beam is 1.43 times the length of the head section.

[0014] Further, the support scaffold and the outer scaffold each comprise a plurality of vertical rods distributed along the left and right on the upper surface of the head section of each cantilever beam, a plurality of longitudinal horizontal rods distributed along the up and down are arranged between the two adjacent vertical rods of the front and rear of the two adjacent cantilever beams, and a plurality of transverse horizontal rods distributed along the up and down are arranged on the plurality of vertical rods of each cantilever beam.

[0015] Further, the number of vertical rods of the outer scaffold on the upper surface of the head section of each cantilever beam is two, and the height of the vertical rods of the outer scaffold is higher than the height of the vertical rods of the support scaffold.

[0016] The utility model discloses reasonable and reliable structure design, through the pre -buried technology will key stressed component cantilever beam and inclined support firmly fixed on the roof structure and top layer structure of building main body structure, and the integral erection support scaffold of cantilever beam and outer scaffold form one stable suspended structure's operation support platform, not only carrying capacity is strong, has strengthened the stability when high -altitude operation, has reduced the construction risk, and simple structure, save time and effort, has improved the construction efficiency's time saving and cost saving while saving the cost, through using cantilever beam directly from higher position starts to erect, avoided the inconvenience that brings from ground layer by layer upward builds full -hall support frame, solved its erection height existence limited problem, simultaneously, the rigidity of whole structure is increased to inclined support, prevents the lateral displacement or overturning risk when high -altitude operation, in addition, the outer scaffold plays the role of safety protection, guarantees the safety of construction personnel high altitude operation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structure schematic diagram of the utility model.

[0018] Figure 2 It is the side view of fixed part in the utility model.

[0019] Figure 3 It is the front view of pre -buried steel sheet in the utility model.

[0020] Figure 4 It is the side view of pre -buried steel sheet in the utility model.

[0021] Figure 5 It is the plane arrangement drawing of cantilever beam in the utility model.

[0022] In the drawing: 1, suspended structure;2, roof structure;3, top layer structure;4, formwork;5, parapet wall;6, cantilever beam;7, inclined support;8, U -type bolt;9, angle steel;10, nut;11, wooden wedge;12, pre -buried steel sheet;13, wall connecting piece;14, vertical rod;15, longitudinal horizontal rod;16, transverse horizontal rod. DETAILED DESCRIPTION

[0023] A kind of formwork platform for high-altitude large-span suspended machine room framework, as shown in Figure 1 and Figure 2, Figure 1 , Figure 3 and Figure 4, Figure 5As shown, including suspended structure 1, roof structure 2, top structure 3, the outer side and bottom of suspended structure 1 are provided with formwork 4, the upper surface of roof structure 2 is provided with parapet 5, the upper surface of roof structure 2 is provided with several cantilever beams 6 which are uniformly distributed along the front and back, the tail section of each cantilever beam 6 is fixed with the upper surface of roof structure 2 through a fixing part, the middle section of each cantilever beam 6 is arranged on parapet 5, the head section of each cantilever beam 6 is cantilevered on the outer side of parapet 5, the head sections of several cantilever beams 6 are collectively provided with a support scaffold, formwork 4 is arranged on the top end of the support scaffold, and the head end of each cantilever beam 6 is connected with top structure 3 through inclined support 7.

[0024] The utility model discloses a pre-embedded technology is firmly fixed cantilever beam 6 and inclined support 7 of key stress component on roof structure 2 and top structure 3 of building main body structure, and the support scaffold of cantilever beam 6 is integrally set up, forms a stable suspended structure 1 operation support platform, not only strong bearing capacity, the stability of high place operation is strengthened, reduces the construction risk, and simple structure, save time and effort, improves the construction efficiency's simultaneously cost saving, through using cantilever beam 6 directly from higher position starts to set up full hall support frame, avoided the inconvenience brought by the full hall support frame from ground layer by layer upwards to build, solved the problem that full hall support frame set up height exists limitation, simultaneously, inclined support 7 increased the rigidity of overall structure, prevented lateral displacement or overturning risk when operating at high place, guaranteed safety.

[0025] As shown in the accompanying drawings, Figure 2 The fixing part includes U-shaped bolt 8, angle steel 9, the lower part of U-shaped bolt 8 is pre-embedded in roof structure 2, the upper surface of parapet 5 is provided with several cantilever beams 6 which are uniformly distributed along the front and back, the tail section of each cantilever beam 6 is fixed with the upper surface of roof structure 2 through a fixing part, the middle section of each cantilever beam 6 is arranged on parapet 5, the head section of each cantilever beam 6 is cantilevered on the outer side of parapet 5, the head sections of several cantilever beams 6 are collectively provided with a support scaffold, formwork 4 is arranged on the top end of the support scaffold, and the head end of each cantilever beam 6 is connected with top structure 3 through inclined support 7.

[0026] Since U-shaped bolt 8 is directly embedded in concrete, it can withstand large tensile force and shear force, providing a stable anchoring point for cantilever beam 6 and ensuring the overall stability of cantilever structure 1; angle steel 9 is used in cooperation with nut 10 through the mounting hole, further enhancing the connection between U-shaped bolt 8 and cantilever beam 6, and the rigid structure of angle steel 9 can effectively disperse the load, preventing damage caused by local stress concentration; wood wedge 11 is clamped between the tail end of cantilever beam 6 and U-shaped bolt 8, which can fill the gap between the two, prevent cantilever beam 6 from sliding or moving horizontally when under stress, increase the friction force of the contact surface, and improve the anti-sliding ability of the entire system; in addition, the use of nut 10 for fastening makes it more convenient for later adjustment and maintenance. If it is necessary to adjust the position of cantilever beam 6 or replace parts, it is only necessary to loosen nut 10, without the need to damage the original structure.

[0027] The cantilever beam 6 is made of No. 20 I-steel, and the distance between two adjacent cantilever beams 6 is 1000 mm.

[0028] The diagonal brace 7 is made of No. 16 I-steel.

[0029] The upper end of each diagonal brace 7 is connected to the head end of the corresponding cantilever beam 6 by high-strength bolts, and the lower end of each diagonal brace 7 is fixed to the top structure 3 by a pre-buried steel plate 12 .

[0030] As attached Figure 3 , Attachment Figure 4 As shown, the embedded steel plate 12 includes a steel plate, one side of which is welded with four evenly distributed round steels with hooks, and the four round steels with hooks are all embedded in the top structure 3, and the other side of the steel plate is welded and fixed to the lower end of the corresponding diagonal brace 7, and the quality grade of the steel plate is Q235.

[0031] Four evenly distributed round steels with hooks are welded to one side of the steel plate, and these round steels are embedded in the top structure 3. This design increases the connection strength between the embedded steel plate 12 and the top structure 3. The hook shape of the round steel can better anchor it in the top structure 3, preventing the embedded steel plate 12 from slipping or pulling out when subjected to force; the steel plate with grade Q235 has good mechanical properties and weldability, and can withstand large loads without being easily deformed or broken. The use of Q235 steel plate ensures the reliability and durability of the embedded steel plate 12; by welding the embedded steel plate 12 to the lower end of the diagonal brace 7 to form a solid whole, this not only enhances the bearing capacity of a single component, but also improves the rigidity of the entire support system, reduces deformation and vibration that may occur during construction, and simplifies the construction process, further improving construction efficiency.

[0032] An outer scaffold is provided on the outside of the supporting scaffold, and the outer scaffold is fixed to the upper surface of the first section of a plurality of cantilever beams 6 , and the outer scaffold is connected and fixed to the parapet 5 through a wall connecting piece 13 .

[0033] The external scaffolding can effectively prevent people and objects from falling from heights, providing construction workers with a safe working platform. It acts as a physical barrier and reduces the risk of working at heights. The wall connecting member 13 acts as a tie, firmly connecting the external scaffolding to the parapet 5 through the wall connecting member 13, ensuring that the external scaffolding will not be displaced or overturned due to wind or other external factors, thereby further improving the safety of construction.

[0034] The sum of the lengths of the middle section and the tail section of each cantilever beam 6 is 1.43 times the length of the first section.

[0035] The proportion setting ensures that the bearing capacity of the first section as the overhanging part of the overhanging beam 6 meets the construction needs, the gravity center of the overhanging part is closer to the main structure of the building, the stability and the overturning resistance of the whole structure are improved, the load distribution is optimized, the longer middle section and tail section help to more evenly distribute the load acting on the overhanging beam 6, reduce local stress concentration, and reduce the risk of structural damage.

[0036] The support scaffold and the outer scaffold each comprise a plurality of vertical poles 14 distributed along the left and right on the upper surface of the first section of each overhanging beam 6, a plurality of longitudinal horizontal poles 15 distributed along the up and down are arranged between the front and rear two adjacent vertical poles 14 of the adjacent two overhanging beams 6, and a plurality of transverse horizontal poles 16 distributed along the up and down are arranged on the plurality of vertical poles 14 on each overhanging beam 6.

[0037] The support scaffold supports the construction of the suspended structure 1 and provides a stable working platform, and the vertical poles 14, the longitudinal horizontal poles 15 and the transverse horizontal poles 16 facilitate flexible assembly and disassembly on site.

[0038] The number of the vertical poles 14 of the outer scaffold on the upper surface of the first section of each overhanging beam 6 is two, and the height of the vertical poles 14 of the outer scaffold is higher than that of the vertical poles 14 of the support scaffold.

[0039] The utility model will be further described in detail through specific embodiments, and it should be noted that the utility model is not limited to the following embodiments.

[0040] In the embodiment, the overhanging beam 6 is made of No. 20 I-beam, the total length of the overhanging beam 6 is 9 m, and the length of the first section of the overhanging beam 6 is 3.7 m; the inclined brace 7 is made of No. 16 I-beam.

[0041] The utility model is realized by the following steps during construction:

[0042] Step one: when the main structure of the building is constructed, the U-shaped bolts 8 are pre-buried at the designed position of the roof structure 2 according to the construction drawing, the embedded steel plate 12 is pre-buried in the top layer structure 3, and a plurality of overhanging beams 6 are evenly distributed on the upper surface of the roof structure 2 along the front and back, as shown in the attached drawings. Figure 5As shown, the distance between two adjacent cantilever beams 6 is 1000mm, the tail section of each cantilever beam 6 is fixed to the upper surface of the roof structure 2 by U-shaped bolts 8, angle steels 9 and nuts 10, and a wooden wedge 11 is arranged between the tail end of each cantilever beam 6 and the corresponding U-shaped bolt 8. The combined structure formed by the U-shaped bolt 8, the angle steel 9, the nut 10 and the wooden wedge 11 is provided with two groups, and the two groups are respectively arranged at a position 200mm away from the rear end of the cantilever beam 6 and a position 400mm away from the rear end of the cantilever beam 6. The middle section of each cantilever beam 6 is arranged on the parapet wall 5. The parapet wall 5 needs to be pre-arranged with a wooden box at the designed position to reserve the position of the cantilever beam 6, and the gap between each cantilever beam 6 and the parapet wall 5 is tightly filled with wooden wedges. The head section of each cantilever beam 6 is cantilevered on the outside of the parapet wall 5.

[0043] Step two: install a diagonal brace 7 between each cantilever beam 6 and the top layer structure 3. One end of each diagonal brace 7 is connected to the head end of the corresponding cantilever beam 6 by a high-strength bolt, and the other end of each diagonal brace 7 is full-welded to the corresponding pre-buried steel plate 12 embedded in the top layer structure 3.

[0044] Step three: first install the outer scaffolding, and then install the supporting scaffolding. When installing the outer scaffolding or the supporting scaffolding, first set up a vertical rod 14 on the top surface of the head section of the cantilever beam 6 according to the design requirements. The vertical rod 14 is alternately set up by steel pipes with a length of 4m-6m, and the joints of the vertical rods 14 are butt-jointed by butt-joint fasteners. After the vertical rods 14 are set up, longitudinal sweeping rods and transverse sweeping rods are arranged at the lower part of the vertical rods 14 according to the design requirements. Then, install longitudinal horizontal rods 15, which are steel pipes with a length of 6m. The longitudinal horizontal rods 15 are arranged on the inner side of the vertical rods 14 by right-angle fasteners, and the joints of the longitudinal horizontal rods 15 are butt-jointed by butt-joint fasteners. Next, install transverse horizontal rods 16, which are steel pipes with a length of 1m. The transverse horizontal rods 16 are fastened on the longitudinal horizontal rods 15 by right-angle fasteners, and the length of the transverse horizontal rods 16 extending out of the longitudinal horizontal rods 15 is 150mm. It should be noted that after the transverse horizontal rods 16 of the outer scaffolding are installed, the outer scaffolding needs to be connected and fixed to the parapet wall 5 by a wall connecting piece 13, and according to the design requirements, scissors braces, foot plates and foot boards are set up. Finally, a safety net with dense meshes is hung on the outside of the outer scaffolding.

[0045] Step four: lay the fixed formwork 4 on the top of the support scaffold, after the formwork 4 is laid, start to bind the reinforcement of the overhanging structure 1, then pour the concrete of the overhanging structure 1, after the strength of the concrete reaches the design requirement, finally remove the present formwork platform, thus the construction of the present formwork platform is completed; overcome the problem that the existing full-support scaffold needs to be built layer by layer from the ground, the maximum height is limited to 30 meters, and the present formwork platform cannot be applied to the structure of hundreds of meters high and the safety hidden trouble of the construction personnel in high-altitude operation for the common overhanging or overhanging design in the current high-rise building, especially the large-span overhanging structure which is more than 8 meters in span and has no support structure under the main structure wall.

[0046] In the implementation process, the installation and erection of the outer scaffold and the support scaffold refer to JGJ130-2011 "Safety Technical Code for Steel Tubular Scaffold with Fasteners in Building Construction".

[0047] In the description of the present application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0048] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A formwork platform for high-altitude large-span suspended machine room structure, comprising a suspended structure (1), a roof structure (2), and a top layer structure (3), the outer side and the bottom of the suspended structure (1) are both provided with a formwork (4), and the upper surface of the roof structure (2) is provided with a parapet (5), characterized in that: The upper surface of the roof structure (2) is provided with a plurality of cantilever beams (6) uniformly distributed along the front and back, the tail section of each cantilever beam (6) is fixed to the upper surface of the roof structure (2) through a fixing part, the middle section of each cantilever beam (6) is arranged on the parapet wall (5), and the head section of each cantilever beam (6) is cantilevered on the outer side of the parapet wall (5). The head sections of the plurality of cantilever beams (6) are collectively provided with a support scaffold, the formwork (4) is installed at the top end of the support scaffold, and the head end of each cantilever beam (6) is connected to the top structure (3) through a diagonal brace (7).

2. The formwork platform for high-altitude large-span suspended machine room structure according to claim 1, characterized in that: The fixing part comprises a U-shaped bolt (8) and an angle steel (9), the lower part of the U-shaped bolt (8) is pre-buried in the roof structure (2), the angle steel (9) is provided with a mounting hole, the angle steel (9) is installed on the upper part of the U-shaped bolt (8) through the mounting hole and a nut (10), and the tail end of the cantilever beam (6) is clamped between the lower surface of the angle steel (9) and the upper surface of the roof structure (2). The tail end of the cantilever beam (6) and the U-shaped bolt (8) are clamped with a wooden wedge (11).

3. The formwork platform for high-altitude large-span suspended machine room structure according to claim 1, characterized in that: The cantilever beam (6) is made of No. 20 I-shaped steel, and the spacing between the two adjacent cantilever beams (6) is 1000mm.

4. The formwork platform for high-altitude large-span suspended machine room structure according to claim 1, characterized in that: The diagonal brace (7) is made of No. 16 I-shaped steel.

5. The formwork platform for high-altitude large-span suspended machine room structure according to claim 1, characterized in that: The upper end of each diagonal brace (7) and the head end of the corresponding cantilever beam (6) are connected by high-strength bolts, and the lower end of each diagonal brace (7) is fixed to the top structure (3) through a pre-buried steel plate (12).

6. The formwork platform for high-altitude large-span suspended machine room structure according to claim 5, characterized in that: The pre-buried steel plate (12) comprises a steel plate, four evenly distributed hook-shaped round steels are welded on one side of the steel plate, and the four hook-shaped round steels are pre-buried in the top structure (3). The other side of the steel plate is welded and fixed with the lower end of the corresponding diagonal brace (7), and the quality grade of the steel plate is Q235.

7. The formwork platform for high-altitude large-span suspended machine room structure according to claim 1, characterized in that: The outer side of the support scaffold is provided with an outer scaffold, and the outer scaffold is fixed to the upper surface of the head section of the plurality of cantilever beams (6). The outer scaffold is connected and fixed to the parapet wall (5) through a wall connecting part (13).

8. The formwork platform for high-altitude large-span suspended machine room structure according to claim 1, characterized in that: The length sum of the middle section and the tail section of each cantilever beam (6) is 1.43 times the length of the head section.

9. The formwork platform for high-altitude large-span suspended machine room structure according to claim 7, characterized in that: The support scaffold and the outer scaffold each comprise a plurality of vertical rods (14) distributed along the left and right on the upper surface of the head section of each cantilever beam (6). A plurality of longitudinal horizontal rods (15) are arranged between the two adjacent vertical rods (14) of the two adjacent cantilever beams (6) in front and back. A plurality of transverse horizontal rods (16) are arranged on the plurality of vertical rods (14) on each cantilever beam (6).

10. The formwork platform for high-altitude large-span suspended machine room structure according to claim 9, characterized in that: The number of vertical rods (14) of the outer scaffold on the upper surface of the head section of each cantilever beam (6) is two, and the height of the vertical rod (14) of the outer scaffold is higher than that of the vertical rod (14) of the support scaffold.

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