Building roof construction platform and construction method

Abstract

The invention provides a building top construction platform and a construction method, and belongs to the technical field of building top construction. The construction platform comprises an underpinning platform system and a bailey truss platform system. The construction method comprises the steps that S1, the construction platform is built; s2, the construction platform is lifted and fixed; s3, after the first lifting device is dismantled, building roof construction is conducted; s4, the construction platform is lowered to the ground; and S5, the construction platform and the second lifting device are dismantled. According to the construction platform, workers do not need to work aloft to build and dismantle the construction platform, the construction safety is improved, overall lifting of the construction platform is achieved, the construction efficiency is improved, the platform in the lifting stage and the platform in the operation stage can be separately designed in the mode, stress is reasonable, force transmission is clear, and the stability of the construction platform is improved; the single bailey truss can be freely spliced into the required length according to the actual section shape or size of a building body, can be circularly applied to special-shaped buildings in different shapes, and is wider in application range.

Description

Technical Field

[0001] This invention belongs to the field of building roof construction technology, and specifically relates to a building roof construction platform and construction method. Background Technology

[0002] An internal construction platform is a platform structure used for construction, inspection, or maintenance work within a building. Because buildings typically have significant height and confined interior spaces, construction platforms are designed to provide workers with a safe and stable working environment for installation, repair, cleaning, or inspection within the building. Currently, the main roof support systems for construction buildings in China include Bailey bridge systems, central lattice column and truss systems, and dome support frames. However, the construction and dismantling of building platforms involve high risks and are time-consuming.

[0003] Chinese patent CN107965193B discloses a construction method for a large-diameter silo structure roof. During installation, Bailey bridges are hoisted to the top of the silo in sections, and then main beams are welded onto the Bailey bridges to connect them into a whole. During dismantling, the main beams are manually cut off on a platform tens of meters high, and then the Bailey bridges are dismantled one by one. This method requires high-altitude operations before the Bailey system has formed a complete closed structure, and the safety of the workers cannot be guaranteed.

[0004] Chinese patent CN119195457B discloses a construction method for a silo roof using a central column and Bailey beam support system. The method involves using a tower crane to lift each Bailey beam into the silo. One end of the Bailey frame is fixed to a pre-embedded bracket on the inner wall of the silo, and the other end is fixed to the mushroom-shaped plate at the top of the central column. The drawback of this method is that each Bailey frame relies on the central mushroom-shaped plate as its support, resulting in high stress on the central column and a large slenderness ratio, leading to insufficient safety.

[0005] It is evident that existing building rooftop construction platforms require workers to operate at heights before the platform is fully erected, and formwork and scaffolding need to be erected at heights. This poses a high construction risk, is inconvenient to build or dismantle, and results in uneven stress distribution, leading to poor stability and further reducing construction safety. Summary of the Invention

[0006] To improve the stability of the construction platform and enhance the safety of rooftop construction, this invention provides a rooftop construction platform and construction method.

[0007] The technical solution of the present invention is as follows:

[0008] A construction platform for building rooftops, comprising:

[0009] A support platform system, which is used to bear weight during the lifting or lowering of the overall construction platform;

[0010] A Bailey bridge platform system, which is connected to the support platform system via connectors, is used for building roof construction and for bearing loads during building roof construction.

[0011] Furthermore, the replacement platform system includes a grid distribution beam and a ring beam, wherein the grid distribution beam is disposed within the ring beam and is on the same plane;

[0012] The Bailey bridge platform system includes a Bailey bridge, a formwork support frame, and a template, with the formwork support frame and template arranged on the upper part of the Bailey bridge.

[0013] The Bailey bridge platform system is connected to the support platform system via fasteners;

[0014] The replacement platform system is located on the upper part of the Bailey bridge to lift it, or the replacement platform system is located on the lower part of the Bailey bridge to support it.

[0015] A method for constructing a building roof includes the following steps:

[0016] S1. Construct a construction platform inside the building;

[0017] S2. Use the first lifting device to lift the construction platform upwards. Once the construction platform reaches the top of the building, fix the construction platform in place using the support components.

[0018] S3. After dismantling the first lifting device, carry out construction on the top of the building and install the second lifting device on the top of the building;

[0019] S4. Remove the supports for the construction platform and use the second lifting device to lower the construction platform to the ground;

[0020] S5. Dismantle the construction platform and the second lifting device.

[0021] Furthermore, in step S1, the construction platform as described above specifically includes: constructing a support platform system on the upper part of the Bailey bridge, or constructing a support platform system on the lower part of the Bailey bridge;

[0022] Constructing a support platform system on the upper part of the Bailey bridge: First, assemble the single Bailey bridge into a Bailey bridge platform. Then, construct a grid-shaped distribution beam and ring beam on the Bailey bridge platform to form a support platform system. Finally, build a formwork support frame and template on the Bailey bridge platform to complete the construction platform construction work.

[0023] To construct a support platform system under the Bailey bridge: First, use a jig to splice the individual Bailey bridge sections to the required length. Then, use trestles to move the spliced ​​Bailey bridge to the predetermined position and lift it. Next, construct a grid-shaped distribution beam and ring beam under the Bailey bridge to form the support platform system. After lowering the height of the Bailey bridge, fix it on the support platform system to form the Bailey bridge platform. Finally, build a formwork and template on the Bailey bridge platform to complete the construction platform construction.

[0024] Furthermore, in step S2, at least eight sets of the first lifting devices are provided, and they are evenly distributed at intervals on the inner wall of the building body located in the same horizontal plane. The first lifting device includes:

[0025] The tripod is installed on the interior wall of the building near the top.

[0026] The first through-type jack is mounted on the tripod, and the other end of the steel strand of the first through-type jack is connected to the construction platform. The connection point between the steel strand of the first through-type jack and the construction platform serves as the lifting point.

[0027] Furthermore, in step S2, the support component includes:

[0028] A steel bracket is placed on the inner wall of the building near the top via embedded parts.

[0029] An electrically operated telescopic bracket is installed on the side edge of the construction platform and is used to cooperate with a supporting steel bracket to fix the construction platform in place after it has been raised.

[0030] Furthermore, step S2 also includes: adjusting the lifting speed of each lifting point according to the data measured by the height monitoring device during the lifting process of the construction platform, and adjusting the position of the construction platform according to the laser monitoring device;

[0031] The height monitoring device is installed at the lifting points of the construction platform to detect the lifting height of each lifting point;

[0032] The laser monitoring device includes a laser projector mounted on a steel bracket and a laser receiving target mounted on the ground inside the building. The laser projector emits laser light toward the laser receiving target to detect whether the construction platform has shifted.

[0033] Furthermore, in step S2, the process of hoisting the construction platform to the top of the building using the first lifting device includes:

[0034] The first through-hole jack was used to lift the construction platform upwards;

[0035] When the construction platform is raised to 10-20cm off the ground, it will hover in the air for 10-15 minutes. After confirming that there are no abnormalities, the lifting will officially begin.

[0036] Once raised to the required height, the electrically operated telescopic bracket extends to the supporting steel bracket, allowing the support components to bear the load and secure the platform; and / or,

[0037] During the lifting process, one of the lifting points is used as the main control point, and the other lifting points are used as references. Every 3 meters of lifting, the height between the main control point and the other lifting points is compared in pairs, and the lifting speed of each lifting point is adjusted according to the height difference.

[0038] Furthermore, in step S3, at least eight sets of the second lifting device are provided, and their positions correspond to those of the first lifting device so that the lifting points are the same. The second lifting device includes:

[0039] A support frame is installed at the top of the building near the edge;

[0040] The second through-hole jack is mounted on the bracket, and the other end of the steel strand of the second through-hole jack is connected to the lifting point on the construction platform.

[0041] The load-bearing conversion steel strand has one end connected to the support and the other end connected to the lifting point on the construction platform.

[0042] Furthermore, in step S4, lowering the construction platform to the ground using the second lifting device includes:

[0043] The second through-hole jack lifts the construction platform, causing the electric telescopic bracket to detach from the resting steel bracket and retract.

[0044] After hovering, anchor the load-bearing steel strand and remove the supporting steel bracket;

[0045] Release the load-bearing steel strand, and let the steel strand of the second through-hole jack bear the load;

[0046] After hovering in the air for 10-15 minutes and confirming that there are no abnormalities, the descent will officially begin until the construction platform reaches the ground.

[0047] The beneficial effects of the present invention are as follows:

[0048] This invention discloses a construction platform and method for building roofs. By constructing the entire construction platform on the ground and then using a lifting device to raise and lower it, the platform can be built on the ground before roof construction and finally dismantled. This eliminates the need for workers to perform high-altitude work during platform construction and dismantling, improving construction safety. Furthermore, the overall raising and lowering of the platform increases construction efficiency. This method allows for separate design of the lifting and operation stages, resulting in reasonable force distribution and clear force transmission. Additionally, the construction platform provided by this invention uses a support platform system as its foundation and a Bailey bridge platform system as the load-bearing support during roof construction, resulting in more even force distribution on the entire construction platform during construction, which improves stability and further enhances construction safety. Attached Figure Description

[0049] Figure 1 This is a structural schematic diagram of the support platform system in the building roof construction platform of this invention when it is set on the upper part of the Bailey bridge;

[0050] Figure 2 This is a structural schematic diagram of the support platform system in the building roof construction platform of this invention when it is set under the Bailey bridge;

[0051] Figure 3 This is a top view of the replacement platform system in an embodiment of the present invention;

[0052] Figure 4 This is a schematic diagram of the structure of the construction platform after it has been erected in a building roof construction method according to an embodiment of the present invention;

[0053] Figure 5 This is a partial structural schematic diagram of the construction platform lifting process in a building roof construction method according to an embodiment of the present invention;

[0054] Figure 6 This is a schematic diagram of the structure after the construction of the building roof is completed in a building roof construction method according to an embodiment of the present invention;

[0055] Figure 7 This is a schematic diagram of the structure of a support component in a building roof construction method according to an embodiment of the present invention;

[0056] Figure 8 This is a top view schematic diagram of the Bailey bridge and support components in a building roof construction method according to an embodiment of the present invention;

[0057] Figure 9 This is a partial structural diagram of the construction platform before its descent in a building roof construction method according to an embodiment of the present invention;

[0058] Figure 10This is a structural schematic diagram of the descent process of the construction platform in a building roof construction method according to an embodiment of the present invention.

[0059] In the diagram: 1. Building structure; 2. Construction platform; 3. Support platform system; 301. Grid distribution beam; 302. Ring beam; 4. Bailey bridge platform system; 401. Bailey bridge; 402. Formwork support frame; 403. Formwork; 5. First lifting device; 501. Tripod; 502. First through-hole jack; 6. Support components; 601. Supporting steel bracket; 602. Electric telescopic bracket; 7. Second lifting device; 701. Support frame; 702. Second through-hole jack; 703. Force conversion steel strand. Detailed Implementation

[0060] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0061] Example 1:

[0062] refer to Figures 1 to 3 This embodiment provides a building roof construction platform, including a support platform system 3 and a Bailey bridge platform system 4.

[0063] The support platform system 3 is used to bear the load during the lifting or lowering of the overall construction platform 2.

[0064] The Bailey bridge platform system 4 is connected to the support platform system 3 via connectors and is used for building roof construction and load-bearing during building roof construction.

[0065] The construction platform 2 provided in this embodiment is supported by the support platform system 3, and the Bailey bridge platform system 4 is the load-bearing support frame during the construction of the building roof. This makes the overall stress on the construction platform 2 more uniform during the construction process, which is conducive to improving the stability of the construction platform 2 and thus improving the construction safety. In addition, this method can design the platform for the lifting stage (support platform system 3) and the operation stage (Bailey bridge platform system 4) separately, with reasonable stress distribution and clear force transmission.

[0066] As a preferred implementation, the support platform system 3 includes a grid distribution beam 301 and a ring beam 302. The grid distribution beam 301 is set inside the ring beam 302 and is on the same plane. Both the grid distribution beam 301 and the ring beam 302 are segmented components connected by bolts. The construction length of the grid distribution beam 301 and the construction shape of the ring beam 302 can be set according to the cross-sectional shape of the building, thereby adjusting the shape of the construction platform 2. It can be used for the construction of roofs of different shapes and has high flexibility.

[0067] The Bailey bridge platform system 4 includes a Bailey bridge 401, a formwork support 402, and a formwork 403. The formwork support 402 and the formwork 403 are set on the upper part of the Bailey bridge 401. The formwork support 402 is used to support the formwork 403, forming a mold for pouring concrete during the construction of the building roof, thereby determining the shape of the building roof. The Bailey bridge 401 is divided into a standard Bailey truss section that can be reused and universally used, and non-standard trusses at both ends that are adapted to the size of the project.

[0068] The Bailey bridge platform system 4 is connected to the support platform system 3 via fasteners. The fasteners use existing technology and will not be described in detail here. The support platform system 3 is set on the upper part of the Bailey bridge 401 to lift the Bailey bridge 401. The assembly process is simple and easy to operate. Alternatively, the support platform system 3 is located at the lower part of the Bailey bridge 401 to support the Bailey bridge 401, which can reduce the impact of the support platform system 3 on the subsequent erection of the formwork 402 and the construction space.

[0069] Example 2:

[0070] refer to Figures 4 to 10 The construction method for building roof provided in this embodiment includes the following steps: S1-S5.

[0071] S1. Construct a construction platform 2 as described in Example 1 inside the building 1.

[0072] In step S1, the construction platform 2 is specifically constructed by either building a support platform system 3 on the upper part of the Bailey bridge 401 or building a support platform system 3 on the lower part of the Bailey bridge 401.

[0073] Constructing a support platform system 3 on top of Bailey bridge 401: First, assemble the single Bailey bridge 401 into a Bailey bridge 401 platform. Then, construct a grid-shaped distribution beam and ring beam 302 on the Bailey bridge 401 platform to form the support platform system 3. Finally, construct a formwork support 402 and a formwork 403 on the Bailey bridge 401 platform to complete the construction of the construction platform 2. This construction method is relatively simple and easy to operate during ground construction, and requires less skill from construction personnel.

[0074] A support platform system 3 is constructed under the Bailey bridge 401: First, a jig is used to splice the individual Bailey bridge 401 pieces to the required length. The jig is a temporary tooling support system used to support, position, and fix large structural components. Its position is movable. In this embodiment, it is used to support and splice the Bailey bridge 401. Subsequently, the spliced ​​Bailey bridge 401 is moved to the predetermined position and lifted using a trestle. A trestle, broadly speaking, refers to a traditional stool resembling a horse; narrowly speaking, it refers to a construction tool used for temporary support and working at height in construction engineering. In this embodiment, the trestle has wheels installed at the bottom for mobility, and the upper rods of the trestle are telescopic and height-adjustable. The steel beam has wheels installed at the bottom for mobility, used to transfer the Bailey bridge 401. The individual Bailey bridge 401 pieces can be freely spliced ​​to the required length according to the actual cross-sectional shape or size of the building. The construction platform for building roofs, which can be assembled into different shapes, can be applied to the construction of building roofs of different shapes, offering high flexibility. Combined with the fact that the construction platform 2 can be freely assembled and disassembled, the construction platform for building roofs in this embodiment can be reused on irregularly shaped buildings of different shapes, thus broadening its applicability and improving its practicality. Next, a grid-shaped distribution beam and a ring beam 302 are constructed below the Bailey bridge 401 to form the support platform system 3. After lowering the height of the Bailey bridge 401, it is fixed on the support platform system 3, thereby forming the Bailey bridge 401 platform. Finally, the formwork 402 and the template 403 are erected on the Bailey bridge 401 platform to complete the construction of the construction platform 2. The support platform system 3 assembled in this way can reduce the impact on the construction space of the subsequent formwork 402 and template 403.

[0075] S2. Use the first lifting device 5 to lift the construction platform 2 upwards. When the construction platform 2 reaches the top of the building, fix the construction platform 2 with the support component 6.

[0076] In a preferred embodiment, in step S2, at least 8 sets of the first lifting device 5 are provided and are evenly distributed on the inner wall of the building body 1 located in the same horizontal plane. The first lifting device 5 includes a tripod 501 and a first through-hole jack 502.

[0077] Tripod 501 is installed on the inner wall of building 1 near the top.

[0078] The first through-type jack 502 is installed on the tripod 501, and the other end of the steel strand of the first through-type jack 502 is connected to the construction platform 2. The connection point between the steel strand of the first through-type jack 502 and the construction platform 2 serves as the lifting point. The number and position of the first lifting device 5 are set according to the actual needs of the site. The lifting point is set on the ring beam 302 in the support platform system 3. The lifting point can be adjusted through the ring beam 302. The position of the lifting point can be adjusted according to different application scenarios, which can be more flexibly applied to irregular buildings.

[0079] In a preferred embodiment, in step S2, the support assembly 6 includes a steel bracket 601 and an electrically telescopic bracket 602.

[0080] The steel bracket 601 is installed on the inner wall of building 1 near the top through embedded parts, and the embedded parts are reserved during the construction of the warehouse wall of building 1.

[0081] The electrically operated telescopic bracket 602 is installed on the side edge of the construction platform 2 and is used to cooperate with the supporting steel bracket 601 to fix the construction platform 2 in place after it has been raised. Figure 8 Each row of Bailey bridge 401 has a support component 6 between its end and the wall of the building 1, which makes the Bailey bridge platform system 4 more efficient in force transmission, more dispersed in load distribution, better in stress distribution, and improved in stability.

[0082] As a preferred embodiment, step S2 further includes: adjusting the lifting speed of each lifting point according to the data measured by the height monitoring device during the lifting process of the construction platform 2, and adjusting the position of the construction platform 2 according to the laser monitoring device.

[0083] A height monitoring device (not shown) is installed at the lifting points of the construction platform 2 to detect the lifting height of each lifting point. The lifting speed of each lifting point is adjusted in a timely manner according to the height of the lifting point to ensure their synchronization, prevent the construction platform 2 from tilting during the ascent, which would affect the fixation of the subsequent platform, and prevent the construction platform 2 from colliding with the warehouse wall during the ascent.

[0084] The laser monitoring device includes a laser projector (not shown) mounted on the supporting steel bracket 601 and a laser receiving target (not shown) mounted on the ground inside the building 1. The laser projector emits a laser beam to the laser receiving target to detect whether the construction platform 2 has shifted. Both the laser projector and the laser receiving target are positioned 10cm away from the wall to ensure that the laser beam is parallel to the wall. Based on the laser feedback, the construction platform 2 is positioned correctly. Specifically, when the laser receiving target successfully receives the laser beam emitted by the laser projector, it indicates that the position of the construction platform 2 has not shifted, and the position of the electric telescopic bracket 602 corresponds to the position of the supporting steel bracket 601, thus successfully completing the placement and fixing of the construction platform 2. On the other hand, the laser point projected by the laser projector onto the ground can serve as the marking base point when the Bailey bridge 401 is erected in the construction platform 2, ensuring that the Bailey bridge 401 is positioned at the supporting steel bracket 601 after lifting.

[0085] In a preferred embodiment, in step S2, the construction platform 2 is hoisted to the top of the building using the first lifting device 5, including:

[0086] The first through-hole jack 502 is in operation, lifting the construction platform 2 upwards.

[0087] When construction platform 2 is raised to 10-20cm off the ground, it is suspended in the air for 10-15 minutes. After confirming that there are no abnormalities, the lifting will officially begin to test the stability of the overall lifting system.

[0088] After being raised to the required height, the electrically telescopic bracket 602 extends to the supporting steel bracket 601, allowing the support assembly 6 to bear the force and fix the platform leveling construction platform. And / or,

[0089] During the lifting process, one of the lifting points is used as the main control point, and the other lifting points are used as references. Every 3m of lifting, the height between the main control point and the other lifting points is compared in pairs. The lifting speed of each lifting point is adjusted according to the height difference. When the height difference is large, it means that the lifting speed of that lifting point is too fast or too slow, and the lifting speed of that lifting point needs to be adjusted so that the overall lifting speed of the construction platform 2 is consistent and to prevent tilting during the lifting process.

[0090] S3. After dismantling the first lifting device 5, carry out construction on the top of the building and set up the second lifting device 7 on the top of the building.

[0091] In a preferred embodiment, in step S3, at least 8 sets of the second lifting device 7 are provided, and the positions correspond to those of the first lifting device 5 so that the lifting points are the same. There is no need to select and determine the lifting points separately, which improves construction efficiency. The second lifting device 7 includes a bracket 701, a second through-type jack 702, and a force conversion steel strand 703.

[0092] The bracket 701 is installed near the edge of the building top, and the bracket 701 is pre-embedded during the construction of the building top.

[0093] The second through-type jack 702 is installed on the bracket 701, and the other end of the steel strand of the second through-type jack 702 is connected to the lifting point on the construction platform 2.

[0094] One end of the load-bearing conversion steel strand 703 is connected to the support 701, and the other end is connected to the suspension point on the construction platform 2. The load-bearing conversion steel strand 703 can improve the reliability of the construction platform 2 under suspended conditions.

[0095] S4. Remove the support for the construction platform 2 and use the second lifting device 7 to lower the construction platform 2 to the ground. During the lowering process of the construction platform 2, adjust the lowering speed of each lifting point according to the data measured by the height monitoring device to ensure their synchronization, avoid the construction platform 2 from tilting during the lowering process, and prevent the construction platform 2 from colliding with the warehouse wall during the lowering process.

[0096] In a preferred embodiment, in step S4, the construction platform 2 is lowered to the ground using the second lifting device 7, including:

[0097] The second through-type jack 702 lifts the construction platform 2, causing the electric telescopic bracket 602 to detach from the resting steel bracket 601 and retract.

[0098] After suspension, the load transfer steel strand 703 is anchored and the supporting steel bracket 601 is removed. When the supporting steel bracket 601 is removed, the load is transferred from the steel strand of the second through-type jack 702 to the load transfer steel strand 703, which can improve the reliability of suspension and thus improve construction safety.

[0099] Release the load-bearing steel strand 703, and the load is then borne by the steel strand of the second through-hole jack 702.

[0100] Hover in the air for 10-15 minutes to check the stability of the overall lifting system. Once it is confirmed that there are no abnormalities, the lowering process will begin until the construction platform 2 reaches the ground.

[0101] S5. Dismantle construction platform 2 and second lifting device 7. When dismantling construction platform 2, dismantle it piece by piece from the outside to the inside, starting from the position closest to the door of building 1.

[0102] The building roof construction method provided in this embodiment involves constructing the entire construction platform 2 on the ground, then using a lifting device to raise and lower the construction platform 2. This allows for the construction of the building roof to be carried out after the platform is built on the ground, and finally the construction platform to be dismantled on the ground. Workers do not need to work at height to build and dismantle the construction platform 2, which improves construction safety and achieves the overall raising and lowering of the construction platform 2, thus improving construction efficiency.

[0103] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A construction platform for building rooftops, characterized in that, include: A support platform system, which is used to bear weight during the lifting or lowering of the overall construction platform; A Bailey bridge platform system, which is connected to the support platform system via connectors, is used for building roof construction and for bearing loads during building roof construction.

2. The building roof construction platform as described in claim 1, characterized in that, The replacement platform system includes a grid distribution beam and a ring beam. The grid distribution beam is set inside the ring beam and is on the same plane. The Bailey bridge platform system includes a Bailey bridge, a formwork support frame, and a template, with the formwork support frame and template arranged on the upper part of the Bailey bridge. The Bailey bridge platform system is connected to the support platform system via fasteners; The replacement platform system is located on the upper part of the Bailey bridge to lift it, or the replacement platform system is located on the lower part of the Bailey bridge to support it.

3. A method for constructing a building roof, characterized in that, Includes the following steps: S1. Construct a construction platform as described in any one of claims 1-2 within the building; S2. Use the first lifting device to lift the construction platform upwards. Once the construction platform reaches the top of the building, fix the construction platform in place using the support components. S3. After dismantling the first lifting device, carry out construction on the top of the building and install the second lifting device on the top of the building; S4. Remove the supports for the construction platform and use the second lifting device to lower the construction platform to the ground; S 5. Dismantle the construction platform and the second lifting device.

4. The construction method for building roofs as described in claim 3, characterized in that, In step S1, the construction platform as described in claim 2 specifically includes: constructing a support platform system on the upper part of the Bailey bridge, or constructing a support platform system on the lower part of the Bailey bridge; Constructing a support platform system on the upper part of the Bailey bridge: First, assemble the single Bailey bridge into a Bailey bridge platform. Then, construct a grid-shaped distribution beam and ring beam on the Bailey bridge platform to form a support platform system. Finally, build a formwork support frame and template on the Bailey bridge platform to complete the construction platform construction work. Constructing a support platform system under the Bailey bridge: First, use a jig to splice individual Bailey bridge sections to the required length. Then, use trestles to move the spliced ​​Bailey bridge to the predetermined position and lift it. Next, construct a grid-shaped distribution beam and ring beam under the Bailey bridge to form the support platform system. After lowering the height of the Bailey bridge, fix it on the support platform system to form the Bailey bridge platform. Finally, build a formwork and template on the Bailey bridge platform to complete the construction platform construction.

5. The construction method for building roofs as described in claim 3, characterized in that, In step S2, at least eight sets of the first lifting devices are provided, and they are evenly distributed at intervals on the inner wall of the building body located in the same horizontal plane. The first lifting device includes: The tripod is installed on the interior wall of the building near the top. The first through-type jack is mounted on the tripod, and the other end of the steel strand of the first through-type jack is connected to the construction platform. The connection point between the steel strand of the first through-type jack and the construction platform serves as the lifting point.

6. The construction method for building roofs as described in claim 5, characterized in that, In step S2, the support component includes: A steel bracket is placed on the inner wall of the building near the top via embedded parts. An electrically operated telescopic bracket is installed on the side edge of the construction platform and is used to cooperate with a supporting steel bracket to fix the construction platform in place after it has been raised.

7. The construction method for building roofs as described in claim 6, characterized in that, Step S2 further includes: adjusting the lifting speed of each lifting point according to the data measured by the height monitoring device during the lifting process of the construction platform, and adjusting the position of the construction platform according to the laser monitoring device; The height monitoring device is installed at the lifting points of the construction platform to detect the lifting height of each lifting point; The laser monitoring device includes a laser projector mounted on a steel bracket and a laser receiving target mounted on the ground inside the building. The laser projector emits laser light toward the laser receiving target to detect whether the construction platform has shifted.

8. The construction method for building roofs as described in claim 7, characterized in that, In step S2, the process of hoisting the construction platform to the top of the building using the first lifting device includes: The first through-hole jack was used to lift the construction platform upwards; When the construction platform is raised to 10-20cm off the ground, it will hover in the air for 10-15 minutes. After confirming that there are no abnormalities, the lifting will officially begin. Once raised to the required height, the electrically operated telescopic bracket extends to the supporting steel bracket, allowing the support components to bear the load and secure the platform; and / or, During the lifting process, one of the lifting points is used as the main control point, and the other lifting points are used as references. Every 3 meters of lifting, the height between the main control point and the other lifting points is compared in pairs, and the lifting speed of each lifting point is adjusted according to the height difference.

9. The construction method for building roofs as described in claim 6, characterized in that, In step S3, at least eight sets of the second lifting device are provided, and their positions correspond to those of the first lifting device so that the lifting points are the same. The second lifting device includes: A support frame is installed at the top of the building near the edge; The second through-hole jack is mounted on the bracket, and the other end of the steel strand of the second through-hole jack is connected to the lifting point on the construction platform. The load-bearing conversion steel strand has one end connected to the support and the other end connected to the lifting point on the construction platform.

10. The construction method for building roofs as described in claim 9, characterized in that, In step S4, lowering the construction platform to the ground using the second lifting device includes: The second through-hole jack lifts the construction platform, causing the electric telescopic bracket to detach from the resting steel bracket and retract. After hovering, anchor the load-bearing steel strand and remove the supporting steel bracket; Release the load-bearing steel strand, and let the steel strand of the second through-hole jack bear the load; After hovering in the air for 10-15 minutes to confirm there are no abnormalities, the descent will officially begin until the construction platform reaches the ground.

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