Concrete supported catwalks on lattice columns

Abstract

The utility model discloses a concrete support descending type platform based on lattice column, its characterized in that, include: the vertical foundation that lattice column and stand column pile build, be provided with guide on lattice column, still include electric hoist, electric hoist lift platform as power source, set up longitudinal main beam in the top of platform, longitudinal main beam is along the rebar concrete support direction and is commonly provided with 4, and two adjacent cross main beams are connected through the double -faced connection of splicing plate, and are connected by two rows of bolts, still include through bracket, corbel, secondary beam, the utility model directly sets up on the ground, utilizes mechanism to rise to the first layer rebar concrete support elevation, then descending construction layer by layer, avoids a large number of aerial work, reduces construction risk, adopts this platform construction rebar concrete support, has solved the difficult problem of the installation of disc buckle full hall support at slope position, utilizes bolt connection in large quantities, avoided the destructive dismantling of platform main beam etc. in the dismantling process.

Description

Technical Field

[0001] This utility model relates to the field of building engineering, specifically to a concrete-supported downward platform based on lattice columns. Background Technology

[0002] In the foundation pit support of this project, the reserved area support needs to use the main structure of the central area as one end support point. Therefore, the steel-concrete support on the lattice column can only be constructed after the main structure of the central area is completed. The first layer is 17.8m from the ground and the second layer is 9.5m from the ground. According to the existing technology, the full-span scaffold is used as the support system for the pouring construction. The foundation of the full-span scaffold needs to be hardened or treated to meet the bearing capacity requirements of the foundation.

[0003] However, current technology still has the following problems: 1. Full-span scaffolding is applicable on flat ground, but not on slopes.

[0004] 2. Full-span scaffolding requires high foundation bearing capacity, and foundation treatment in soft soil requires high costs.

[0005] 3. High-support formwork and full-span scaffolding structures are complex and have low construction efficiency.

[0006] 4. High formwork requires a lot of manpower, heavily relies on the skill level, experience and sense of responsibility of the workers, and is costly and difficult to control in terms of quality.

[0007] Therefore, this utility model proposes a concrete-supported downward platform based on lattice columns, which solves the above-mentioned technical problems. Utility Model Content

[0008] The purpose of this utility model is to address the aforementioned problems by providing a descending platform based on concrete support on lattice columns. This utility model is directly erected on the ground, using a mechanism to lift it to the first level of reinforced concrete support, and then descends layer by layer for construction. This avoids a large amount of high-altitude work, reduces construction risks, and solves the problem of installing disc-lock full-span scaffolding on sloping locations by using this platform for reinforced concrete support construction. The extensive use of bolt connections avoids the destructive dismantling of the platform's main beams and other components during the dismantling process caused by welding.

[0009] The technical solution of this utility model is as follows: This utility model is a concrete-supported downward platform based on lattice columns, comprising: a vertical foundation constructed of column piles and lattice columns, with guide rails installed on the lattice columns; an electric hoist serving as the power source for lifting the platform; a longitudinal main beam installed at the top of the platform, with a total of four longitudinal main beams installed along the direction of the reinforced concrete support, and adjacent spans of main beams connected on both sides by splicing plates and connected by two rows of bolts; and also includes brackets, corbels, and secondary beams.

[0010] The column piles and lattice columns serve as the vertical load-bearing core, replacing the foundation treatment requirements of traditional full-span scaffolding. The lattice columns are directly used as the supporting foundation, solving the problem of poor adaptability to slopes or soft soil strata. The guide rail system is set on the outside of the lattice columns and connected to the bracket through limit wheels, forming a guide and limit device for platform lifting, ensuring that the platform is lifted vertically without tilting. Each lattice column is equipped with an electric hoist, which serves as the main power source for platform lifting, enabling rapid lifting of the platform. This lifting is carried out span by span, avoiding the risks of working at height. There are 4 longitudinal main beams, arranged along the support direction, and connected on both sides by splicing plates to form the main load-bearing frame of the platform, bearing the construction load and transferring it to the lattice columns.

[0011] Furthermore, the column piles are made of A800mm steel, and the lattice column dimensions are 460mm×460mm, ensuring that the vertical force system meets the bearing capacity requirements of the foundation pit support and avoiding structural instability due to insufficient dimensions; the main beams are made of I40C Q235B I-beams, the splice plates are 350mm high and 500mm long, and the bolts are M24 grade 8.8, with a total of 16 bolts in two rows, ensuring that the connection strength meets the construction load requirements and avoiding destructive demolition issues caused by welding.

[0012] Furthermore, the bracket is made of Q235B I-beams of I40C grade. The bracket is welded to the main beam. The transverse bracket connects two lattice columns in the same row and is bolted to the guide rail. Three I20 Q235B I-beams are set in the middle of the bracket as connecting beams. The bracket is transversely connected to the lattice columns in the same row and bolted to the guide rail. The three I20 connecting beams in the middle enhance the overall rigidity. The main beam is welded to form a stable platform support frame. The bracket is made of 20mm thick Q235B steel plate. The bracket is 500mm long. Two brackets are set for each lattice column. The bracket is bolted to the lattice column. S83 Q345 shims are set between the bracket and the bracket. The shims are 420×200×120mm M30. The bracket is placed on top of the shims to adjust the flatness of the platform and provide a gap for template removal, solving the problem of high-altitude operation of traditional supports.

[0013] Furthermore, the secondary beams are arranged with I20 I-beams at 60cm intervals above the main beams. The length of the secondary beams extends 1200mm beyond the outer edge of the reinforced concrete. The secondary beams are connected to the main beams by steel clamp bolts to form a uniform support grid, ensuring that the load of the formwork system is evenly distributed and avoiding local stress concentration.

[0014] Furthermore, the template is supported by 50×100mm square timber laid at 300mm intervals above the secondary beam. A 15mm composite plywood is laid on top of the square timber as the bottom formwork. The template and the square timber are fixed by nailing. The square timber serves as the support beam, and the plywood serves as the bottom formwork. The nailing and fixing formwork forms the construction surface, ensuring the molding quality and surface flatness of the concrete during pouring, while also facilitating disassembly.

[0015] Furthermore, the work platform is fully covered with template beams and 15mm composite plywood within the secondary beam area. Anti-slip strips are installed on the template at 200mm intervals. The entire secondary beam area is covered with template beams and plywood, and the 200mm interval anti-slip strips prevent workers from slipping, improving construction safety. The edge protection is made of A48×3mm steel pipes, with uprights spaced 1200mm apart and 1200mm high. Protective netting and signs are also installed to form a standardized safety barrier and reduce the risk of falls.

[0016] Furthermore, the guide rail is set on the outside of each lattice column and is bolted to the lattice column. The bracket is connected to the guide rail through a limit wheel, which serves as a limit device when the platform moves up and down. The entire secondary beam area is covered with template beams and plywood to form a double limit mechanism, ensuring that the platform does not deviate or tilt during the lifting and lowering process, thereby improving construction accuracy.

[0017] Furthermore, one electric hoist is installed on each lattice column, and the frame is raised and lowered span by span. After the platform is assembled, the top of the lattice column is used as the hanging point of the electric hoist, and the electric hoist is connected to the main beam bracket by hook. Each lattice column is controlled independently. The top of the lattice column / pre-embedded lifting ring is used as the hanging point, and the electric hoist is connected to the main beam bracket by hook, so as to realize the precise lifting and positioning of the platform and avoid the high-risk operation of overall hoisting.

[0018] Furthermore, during the construction of the first layer of reinforced concrete support, after the platform is raised to the first layer elevation, corbels and shims are installed. Through the cyclical operation of platform lifting and corbel / shim installation and removal, continuous construction of the first layer to the second layer of reinforced concrete support is achieved, avoiding repeated erection and dismantling of the full-span scaffolding, and improving construction efficiency and material utilization. After the first layer is poured, the lifting rings pre-embedded in the top of the lattice column are used as the hanging points of the electric hoist. The shims and corbels are removed, the corbels removed in the first layer are installed at the corresponding elevation position in the second layer, and the shims are installed. The platform is then slowly lowered to the second layer for construction.

[0019] Furthermore, the above steps enable layered construction of reinforced concrete supports. The construction process includes a cyclical operation of platform lifting, corbel installation, formwork laying, concrete pouring, and dismantling. The entire process of platform lifting, corbel installation, formwork laying, concrete pouring, and dismantling is clearly defined, forming a replicable standardized construction system to ensure quality control and construction safety.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. This utility model is directly erected on the ground, using a mechanism to lift to the first layer of reinforced concrete support elevation, and then proceeds down layer by layer for construction, avoiding a large amount of high-altitude work and reducing construction risks. The use of this platform for reinforced concrete support construction solves the problem of installing disc-lock full-span scaffolding on sloping locations. The extensive use of bolt connections avoids the destructive dismantling of the platform's main beams and other components during the dismantling process.

[0021] 2. This utility model completes the processing in one go. According to the support construction, the first, second and third layers of reinforced concrete supports are constructed from top to bottom, avoiding the repeated erection and dismantling of full-span scaffolding, improving construction efficiency and saving a lot of materials. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of the downward platform based on a lattice column and concrete support according to this utility model; Figure 2 This is a plan view of the platform of this utility model; Figure 3 This is a plan view of the bracket of this utility model; Attached reference numerals: 1-Concrete support, 2-Secondary beam, 3-Electric hoist, 4-Bracket, 41-Bracket lifting ring, 5-Main beam, 6-Shim, 7-Corner, 8-Lattice column. Detailed Implementation

[0023] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0024] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0025] like Figures 1-2 The diagram shows the construction process and working principle of this utility model: A vertical load-bearing system is constructed: the column piles 9 and the lattice columns 8 form a rigid vertical foundation, replacing the traditional full-span scaffolding foundation treatment. The foundation pit itself (lattice columns) is used as the support core, solving the problem of poor adaptability to slopes / soft soil strata. Guide rails 10 are installed on the outside of the lattice columns 8 and are rigidly connected to the lattice columns 8 by bolts to form a platform lifting guide rail.

[0026] Platform lifting power system: An electric hoist 3 is installed on the top of each lattice column 8 as the main power source. During platform assembly, the electric hoist 3 is hooked to the main beam bracket lifting ring 41, using the top of the lattice column 8 as the hanging point to lift the platform to the first floor elevation. The lifting process adopts span-by-span control, and the rolling cooperation between the limit wheel 18 and the guide rail 10 ensures that the platform is lifted vertically without tilting.

[0027] The main load-bearing frame is formed by four longitudinal main beams 5 along the direction of the reinforced concrete support 1, using I40C I-beams. Adjacent spans are connected on both sides by splice plates, and 16 M24 bolts provide high-strength connections, forming the main load-bearing frame of the platform. The main beams 5 are welded to the brackets 4, and the brackets 4 are laterally connected to two lattice columns 8 in the same row. Three connecting beams 12 are set in the middle to enhance the overall rigidity.

[0028] Formwork support system construction: Secondary beam 2 is supported by I20 I-beams spaced 60cm apart, extending 1200mm outwards to cover the support edge, and connected to the main beam 5 via steel clamp bolts. Formwork support beams 13 are laid above secondary beam 2, with 50×100mm square timber spaced 300mm apart. Composite plywood 14 is laid on the surface as the bottom formwork, nailed and fixed to form the construction surface, ensuring the quality of concrete molding.

[0029] Safety and Construction Process: The work platform is fully covered with formwork beams and plywood within the area of ​​secondary beam 2, with anti-slip strips 15 on the surface to prevent slipping. Edge protection is constructed using steel pipes, with uprights spaced 1200mm apart and 1200mm high, and includes safety netting and signage. During construction, after the platform is raised to the first floor elevation, corbels 7 and shims 6 are installed. After pouring, the shims 6 are removed, and the corbels 7 are moved to the second floor. The platform is then lowered layer by layer using electric hoists 3, achieving layered construction of the concrete support 1, forming a cyclical operation system of "lifting-installation-pouring-removal".

[0030] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A concrete-supported descending platform based on lattice columns, characterized in that, include: The vertical foundation is constructed from column piles and lattice columns, with guide rails installed on the lattice columns; it also includes an electric hoist, which serves as a power source for lifting the platform. A longitudinal main beam is provided at the top of the platform. There are a total of 4 longitudinal main beams along the direction of reinforced concrete support. Adjacent main beams are connected on both sides by splicing plates and connected by two rows of bolts. The platform also includes brackets, corbels, and secondary beams.

2. The concrete-supported descending platform based on lattice columns according to claim 1, characterized in that, The column piles are A800mm thick, the lattice column dimensions are 460mm×460mm, the main beam is made of Q235B I-beams of I40C grade, the splicing plate dimensions are 350mm high and 500mm long, and the bolts are M24 grade 8.8, with a total of 16 bolts in two rows.

3. The concrete-supported descending platform based on lattice columns according to claim 2, characterized in that, The bracket is made of Q235B I-beams of I40C grade. The bracket is welded to the main beam. The transverse bracket connects two lattice columns in the same row and is bolted to the guide rail. Three I20 Q235B I-beams are set in the middle of the bracket as connecting beams. The corbel is made of 20mm thick Q235B steel plate. The corbel is 500mm long. Two corbels are set for each lattice column. The corbels are bolted to the lattice column. Q345 shims of S83 grade are set between the corbels and the bracket. The shims are 420×200×120mm M30. The bracket is placed on top of the shims.

4. The concrete-supported descending platform based on lattice columns according to claim 3, characterized in that, The secondary beams are arranged with I20 I-beams at 60cm intervals above the main beams. The length of the secondary beams extends 1200mm beyond the outer edge of the reinforced concrete. The secondary beams are connected to the main beams by steel clamp bolts.

5. The concrete-supported descending platform based on lattice columns according to claim 4, characterized in that, 50×100mm square timber is laid on top of the secondary beam at 300mm intervals as the formwork support beam. 15mm composite plywood is laid on top of the square timber as the bottom formwork. The formwork and square timber are fixed together by nailing.

6. The concrete-supported descending platform based on lattice columns according to claim 5, characterized in that, Within the secondary beam area, formwork beams and 15mm composite plywood are laid out completely, and anti-slip strips are installed on the formwork at 200mm intervals; edge protection is made of A48×3mm steel pipes, with uprights spaced 1200mm apart and 1200mm high, and protective netting and signs are hung.

7. The concrete-supported descending platform based on lattice columns according to claim 6, characterized in that, The guide rail is set on the outside of each lattice column and is bolted to the lattice column. The bracket is connected to the guide rail through a limit wheel, which serves as a limit device when the platform moves up and down.

8. The concrete-supported descending platform based on lattice columns according to claim 7, characterized in that, One electric hoist is installed on each lattice column, and the frame is raised and lowered span by span. After the platform is assembled, the top of the lattice column is used as the hanging point for the electric hoist, and the electric hoist is connected to the main beam bracket by hook.

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