Frame full-enclosed outer scaffold for winter construction and wind load resisting method of the same

Abstract

The application provides a frame full-closed outer scaffold construction in winter and a wind load resisting method thereof, and relates to the technical field of building construction. The outer scaffold is arranged around the concrete frame to form a full-closed structure and serve as a heat preservation shed framework, and the inner vertical rod support structure is arranged around the concrete frame. The wind passage is arranged through the outer scaffold and the heat preservation layer, adopts a composite structure of inner formwork + heat preservation cotton + anti-seepage film, uniformly unloads the wind load, effectively reduces the lateral pressure generated by the wind load, guarantees the stability of the outer scaffold and the frame support frame, avoids temperature loss and leakage at the wind passage through the arrangement of the heat preservation cotton and the anti-seepage film, considers the wind resistance and heat preservation performance, and improves the wind load unloading efficiency and the temperature stability in the shed.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a fully enclosed frame scaffolding used as an insulation shed for winter construction and its wind load resistance method. Background Technology

[0002] During winter construction in northern regions, the severe cold weather necessitates the complete enclosure of concrete structures, such as those used in chemical plants, for the construction of such projects. This involves constructing insulated sheds using external scaffolding and covering them with insulation materials to raise the internal temperature and meet the requirements for concrete curing and construction. Currently, existing technology typically involves constructing insulated sheds by completely enclosing the external scaffolding with insulating blankets. Support frames are used to secure the enclosure structure, and construction access is provided. This method achieves insulation of the internal structure, ensuring the smooth progress of concrete construction during winter.

[0003] However, strong winds are common during winter construction in northern regions, and fully enclosed external scaffolding insulated sheds are subject to significant wind loads. Existing technologies lack effective wind load unloading structures and methods. The lateral pressure generated by wind loads can easily lead to deformation and instability of the external scaffolding, even affecting the safety of the frame support. Simultaneously, the design of existing insulated sheds' air passageways is unreasonable, either failing to effectively unload wind loads or exhibiting poor insulation, resulting in heat loss and failing to meet the insulation requirements of concrete construction. Furthermore, the existing support structure design for the top insulation blankets is inadequate, lacking dedicated support components, leading to problems such as unstable supports and blanket detachment. Leakage is also a potential issue at the connection between the support components and the floor slab, further impacting construction quality and safety. Additionally, existing technologies lack scientific methods for calculating wind load resistance, making it impossible to accurately control the impact of wind loads on scaffolding and insulated sheds, thus hindering structural stability. Therefore, this invention proposes a fully enclosed frame scaffolding used as an insulated shed for winter construction and its wind load resistance method to address the problems existing in the prior art. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a method for constructing a fully enclosed external scaffolding frame as an insulated shed during winter construction, along with its wind load resistance. The method employs a composite structure of inner formwork, insulation cotton, and a waterproof membrane. This structure achieves uniform unloading of wind loads, effectively reducing lateral pressure and ensuring the stability of the external scaffolding and frame support. Furthermore, the use of insulation cotton and the waterproof membrane prevents temperature loss and leakage at wind passages, thus balancing wind resistance and insulation performance, improving wind load unloading efficiency and internal temperature stability.

[0005] To achieve the objectives of this invention, the following technical solution is provided: a fully enclosed external scaffolding structure used as an insulation shed for winter construction, comprising a concrete frame, external scaffolding, insulation layer, ventilation channel, internal support structure, and floor slab formwork structure. The external scaffolding surrounds the concrete frame, forming a fully enclosed structure and serving as the skeleton of the insulation shed. Internal support structures are provided around the concrete frame. The insulation layer includes insulation blankets spliced ​​and fixed to the outside of the external scaffolding and a top covering blanket covering the top of the insulation shed. The top covering blanket and the surrounding insulation blankets form a fully enclosed insulation space.

[0006] The ventilation channel is installed through the external scaffolding and insulation layer, and includes a rectangular strip-shaped inner formwork for the ventilation channel, insulation cotton wrapped around the outside of the inner formwork, and a waterproof membrane wrapped around the outside of the insulation cotton. The inner upright support structure includes inner uprights for formwork support and horizontal bars connecting the inner uprights of the formwork support. The inner uprights of the formwork support are used to support the top covered with cotton quilts. The inner uprights of the formwork support include uprights and steel pipe waterstop wing plates fixed to the bottom of the uprights and embedded in the concrete. The floor slab formwork structure includes the formwork for the concrete floor slab. The inner uprights of the formwork support are installed through the formwork. After the concrete is poured, the uprights are cut off and the steel pipe holes in the floor slab are sealed.

[0007] A further improvement is that the ventilation channels are evenly spaced along the height of the external scaffolding, with an adjacent spacing of 1.5-2.5m, and are evenly distributed along the perimeter of the external scaffolding. At least two ventilation channels are provided on each side of the external scaffolding, and the cross-sectional dimensions of the ventilation channels are 300mm×400mm-500mm×600mm.

[0008] A further improvement is made in that a fireproof isolation layer is set between the thermal insulation quilt and the external scaffold. The fireproof isolation layer is made of fireproof rock wool board with a thickness of 50-80mm. The thermal insulation quilt is tied and fixed to the uprights and horizontal bars of the external scaffold by galvanized iron wire, with a tying interval of no more than 500mm.

[0009] Further improvements are made in that: the steel pipe waterstop wing plate is made of circular steel plate with a thickness of 8-12mm and a diameter of 150-200mm, and the steel pipe waterstop wing plate is fully welded to the upright, with the weld height not less than the wall thickness of the upright.

[0010] A method for resisting wind loads using a fully enclosed external scaffolding frame as an insulated shed during winter construction includes the following steps:

[0011] S1: Build an external scaffold around the concrete frame, and set up vertical and horizontal poles around the frame;

[0012] S2: Evenly leave ventilation channels on the external scaffolding, assemble and fix the formwork, insulation cotton and waterproof film inside the ventilation channels, use support frames to fix the ventilation channels and enclosure structure, and leave construction channels.

[0013] S3: Install internal uprights for formwork support through the formwork of the concrete floor slab, fix the steel pipe waterstop wing plate and ensure that it can be embedded in the concrete, and connect the horizontal bar to form an internal upright support structure.

[0014] S4: Splice and lay thermal insulation quilts and cover the top with quilts to form a fully enclosed thermal insulation space, and wrap and insulate the part of the air passage that enters the thermal insulation shed.

[0015] S5: Calculate wind load and the bearing capacity of the internal support structure through algorithms, and adjust structural parameters to ensure stability;

[0016] S6: Maintain structural integrity during construction. After the concrete is poured, cut the uprights and seal the steel pipe holes. Then dismantle the insulation shed and scaffolding.

[0017] A further improvement is made in S2, where the assembly sequence of the ventilation channel is as follows: first, the inner template of the ventilation channel is installed, then insulation cotton is wrapped around its outer side, and finally a waterproof membrane is wrapped around its inner side. The ventilation channel is fixed to the external scaffolding with bolts, and the width of the construction channel is 1.2-1.5m.

[0018] A further improvement is made in S5, where the wind load calculation uses the following algorithm formula:

[0019] ,

[0020] Where: Wk is the standard value of wind load. , refers to the wind load per unit area acting on the surface of the external scaffolding and insulation shed; The wind vibration coefficient at height z is determined based on the height of the construction frame, and its value ranges from 1.0 to 1.8. The higher the frame, the greater the wind vibration coefficient. The larger the value; This is the wind load shape coefficient. For fully enclosed external scaffolding insulation sheds, the value is taken as 0.8-1.2. The denser the air passage arrangement, the better. The smaller the value; This is the wind pressure height variation coefficient, determined based on the ground roughness category of the construction area. In open areas, it ranges from 0.7 to 1.5; the higher the altitude, the greater the variation. The larger the value, the greater; W0 is the basic wind pressure. The value was determined based on meteorological data from the construction area. .

[0021] A further improvement is made in S5, where the load-bearing capacity calculation of the inner upright support structure uses the following algorithm formula:

[0022] ,

[0023] Where: Nmax is the maximum axial force of the upright (kN), which refers to the maximum resultant force borne by the upright on the top covering quilt and its own weight; Qk is the standard value of the uniformly distributed live load of the top covering quilt. The value is Gk is the standard value of the self-weight of the internal upright support structure (kN / m), which is calculated based on the specifications and spacing of the uprights and horizontal bars; A is the cross-sectional area of ​​the upright. The value is determined by calculation based on the diameter and wall thickness of the steel pipe used for the upright; f is the design value of the compressive strength of the upright. ,use When using steel pipes, f takes the value of .

[0024] Further improvements are made in S6, which includes daily inspection of the integrity of the external scaffolding, ventilation passages, insulation layer and internal support structure, timely tightening of loose parts, replacement of damaged insulation materials and waterproof membranes, and suspension of construction and reinforcement of the structure in windy weather.

[0025] A further improvement is made in S6: after the concrete floor slab is poured, when the concrete strength reaches 60%-80% of the design strength, the uprights are cut off, the steel pipe holes on the floor slab are sealed with cement mortar, and the external scaffolding and insulation layer are dismantled step by step from top to bottom according to the specifications.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. The ventilation channel of this invention runs through the external scaffolding and insulation layer, and adopts a composite structure of inner template + insulation cotton + waterproof film. This not only achieves uniform unloading of wind load, effectively reduces the lateral pressure generated by wind load, and ensures the stability of the external scaffolding and frame support, but also avoids temperature loss and leakage at the ventilation channel through the setting of insulation cotton and waterproof film. It takes into account both wind resistance and heat preservation performance, and improves the wind load unloading efficiency and the temperature stability inside the shed.

[0028] 2. This invention adds dedicated inner uprights for the template support and steel pipe water-stop wing plates, which solves the problems of unstable support for the existing top insulation quilt and floor leakage. The inner uprights of the template support are only used to support the top covering quilt and are not connected to the external scaffolding support frame, thus avoiding structural instability caused by mutual interference of the support system. The setting of the steel pipe water-stop wing plates effectively blocks the seepage path, reducing the leakage risk rate by 100%. At the same time, the support stability of the top covering quilt is improved by 40%, preventing the quilt from falling off and affecting the insulation effect.

[0029] 3. This invention employs a wind load calculation method and introduces a proprietary algorithm formula to achieve accurate calculation of wind load and reasonable adjustment of structural parameters. This solves the problems of lacking effective wind load calculation methods and inaccurate control of structural stability in existing technologies. Through the algorithm formula, the impact of wind load on scaffolding, wind passages, and internal support structures can be accurately calculated, providing data support for structural design and adjustment. This increases the structural wind resistance safety factor to over 1.5, reducing the risk of structural instability by more than 50% compared to existing technologies. Furthermore, the combination of a fireproof isolation layer further enhances construction safety. Attached Figure Description

[0030] Figure 1 This is the front view of the present invention;

[0031] Figure 2 This is a schematic diagram of the concrete frame of the present invention;

[0032] Figure 3 This is a side view of the air passage of the present invention;

[0033] Figure 4 This is a top sectional view of the present invention;

[0034] Figure 5 This is a schematic diagram of the inner upright of the template support of the present invention;

[0035] Figure 6 This is a top view of the template of the present invention;

[0036] Figure 7 This is a top view of the cotton quilt covering the top of the present invention.

[0037] The components include: 1. Concrete frame; 2. External scaffolding; 3. Thermal insulation quilt; 4. Ventilation passage; 41. Formwork inside the ventilation passage; 42. Thermal insulation cotton; 43. Impermeable membrane; 5. Inner uprights of the formwork support; 51. Uprights; 52. Steel pipe waterstop wing plate; 6. Horizontal bar; 7. Formwork; 8. Top covering quilt. Detailed Implementation

[0038] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0039] Example 1

[0040] according to Figure 1 , 2 As shown in Figures 3, 4, 5, 6, and 7, this embodiment proposes a method for using a fully enclosed external scaffolding frame as an insulated shed during winter construction and its wind load resistance. This method was applied to the winter construction of a concrete frame in a chemical plant, where the average winter temperature is [missing information]. The average wind speed is The maximum wind speed can reach 12m / s, the construction frame is 15m high and 40m in circumference.

[0041] The specific implementation steps of the structure and method of this invention are as follows:

[0042] Erecting external scaffolding 2: Erect external scaffolding 2 around the concrete frame 1. The spacing between the uprights of external scaffolding 2 is 1.2m, and the step distance of the horizontal bars is 1.8m. Uprights and horizontal bars are only set around the frame, and no uprights are set on the floor. Coupler-type connections are used to ensure the overall stability of external scaffolding 2.

[0043] Install ventilation ducts 4: Along the height direction of the outer scaffold 2, one layer of ventilation duct 4 is set every 2m, for a total of 7 layers. Three ventilation ducts 4 are set on each side of the outer scaffold 2, evenly distributed along the perimeter. The cross-sectional dimensions of the ventilation duct 4 are 400mm×500mm. The inner formwork 41 of the ventilation duct is made of steel plate with a thickness of 5mm. The insulation cotton 42 is made of centrifugal glass wool with a thickness of 100mm. The waterproof membrane 43 is made of PVC waterproof membrane with a thickness of 0.5mm. The assembled ventilation duct 4 is fixed to the outer scaffold 2 with bolts. Steel pipe support frames are used to fix the ventilation duct 4 and the enclosure structure. Two construction passages with a width of 1.2m are left.

[0044] Installation of internal support structure: The formwork 7 for the concrete floor slab is made of film-coated plywood, and the uprights 51 of the internal support structure 5 are made of... Steel pipes, spaced 1.5m apart, with horizontal bar 6 using... The steel pipe has a step distance of 1.8m. The steel pipe waterstop wing plate 52 is made of round steel plate with a thickness of 10mm and a diameter of 180mm. It is fully welded to the upright 51 with a weld height of 3.5mm. The upright 51 is set through the template 7 to ensure that the steel pipe waterstop wing plate 52 is located below the template 7 and can be embedded in the subsequently poured concrete. The inner upright support structure is only used to support the top covering quilt 8 and is not connected to the outer scaffold 2 support frame.

[0045] Laying the insulation layer: The insulation quilt 3 is made of flame-retardant rock wool quilt with a thickness of 150mm. After multiple pieces are spliced ​​together, they are fixed to the outside of the outer scaffold 2 by galvanized iron wire with a binding spacing of 400mm. A 60mm thick fireproof rock wool board is laid between the insulation quilt 3 and the outer scaffold 2 as a fireproof isolation layer. The top covering quilt 8 is made of the same material as the insulation quilt 3. After being laid, it is sealed and connected with the surrounding insulation quilt 3 to form a fully enclosed insulation space. The part of the air passage 4 that enters the insulation shed is further wrapped with insulation quilt for insulation.

[0046] Wind load calculation and adjustment: The wind load is calculated using the algorithm formula of this invention, and the parameters of the wind passage 4 are adjusted to ensure structural stability;

[0047] Construction process maintenance and post-construction treatment: During construction, inspect the external scaffolding 2, ventilation passage 4, insulation layer and internal upright support structure daily, tighten loose binding points and connectors in a timely manner, and replace damaged insulation cotton quilts 3 and waterproof membranes 43; after the concrete floor slab is poured, when the concrete strength reaches 70% of the design strength, cut the uprights 51, and seal the steel pipe holes on the floor slab with cement mortar. After construction is completed, dismantle the external scaffolding 2 and insulation layer according to the specifications.

[0048] Example 2

[0049] according to Figure 1 , 2 As shown in Figures 3, 4, 5, 6, and 7, this embodiment proposes a method for using a fully enclosed external scaffolding frame as an insulated shed during winter construction and its wind load resistance. This method was applied to the winter construction of a concrete frame in a chemical plant, where the average winter temperature is [missing information]. The average wind speed is The maximum wind speed can reach 15m / s, the construction frame is 20m high and 50m in circumference.

[0050] The specific implementation steps of the structure and method of this invention are as follows:

[0051] Erecting external scaffolding 2: Erect external scaffolding 2 around the concrete frame 1. The spacing between the uprights of external scaffolding 2 is 1.0m, and the step distance of the horizontal bars is 1.5m. Uprights and horizontal bars are only set around the frame. No uprights are set on the floor. Coupler connection is used. The bottom of the uprights is set with pads to improve the overall stability.

[0052] Install ventilation ducts 4: Along the height direction of the outer scaffold 2, one layer of ventilation duct 4 is set every 1.5m, for a total of 13 layers. Four ventilation ducts 4 are set on each side of the outer scaffold 2, evenly distributed along the perimeter. The cross-sectional dimensions of the ventilation duct 4 are 500mm×600mm. The inner formwork 41 of the ventilation duct is made of steel plate with a thickness of 6mm. The insulation cotton 42 is made of centrifugal glass wool with a thickness of 120mm. The waterproof membrane 43 is made of PVC waterproof membrane with a thickness of 0.6mm. The assembled ventilation ducts 4 are fixed to the outer scaffold 2 with bolts. Steel pipe support frames are used to fix the ventilation ducts 4 and the enclosure structure. Two construction passages with a width of 1.5m are left.

[0053] Installation of internal support structure: The formwork 7 for the concrete floor slab is made of film-coated plywood, and the uprights 51 of the internal support structure 5 are made of... Steel pipes, spaced 1.2m apart, with horizontal bar 6 using... The steel pipe has a step distance of 1.5m. The steel pipe waterstop wing plate 52 is made of round steel plate with a thickness of 12mm and a diameter of 200mm. It is fully welded to the upright 51 with a weld height of 3.5mm. The upright 51 is set through the template 7 to ensure that the steel pipe waterstop wing plate 52 is located below the template 7 and can be embedded in the subsequently poured concrete. The inner upright support structure is only used to support the top covering quilt 8 and is not connected to the outer scaffold 2 support frame.

[0054] Insulation layer installation: The insulation quilt 3 is made of flame-retardant rock wool quilt with a thickness of 180mm. Multiple pieces are spliced ​​together and fixed to the outside of the outer scaffold 2 with galvanized iron wire. The binding spacing is 350mm. A fireproof rock wool board with a thickness of 80mm is laid between the insulation quilt 3 and the outer scaffold 2 as a fireproof isolation layer. The top covering quilt 8 is made of the same material as the insulation quilt 3. After being laid, it is sealed and connected with the surrounding insulation quilt 3 to form a fully enclosed insulation space. The part of the air passage 4 that enters the insulation shed is further wrapped with insulation quilt for insulation.

[0055] Wind load calculation and adjustment: The wind load is calculated using the algorithm formula of this invention, and the parameters of the wind passage 4 are adjusted to ensure structural stability;

[0056] Construction process maintenance and post-construction treatment: During construction, inspect the external scaffolding 2, ventilation passage 4, insulation layer and internal upright support structure daily, tighten loose binding points and connectors in a timely manner, replace damaged insulation cotton blankets 3 and waterproof membranes 43. If the wind speed exceeds 12m / s in windy weather, suspend construction and reinforce the structure. After the concrete floor slab is poured, when the concrete strength reaches 80% of the design strength, cut the uprights 51 and seal the steel pipe holes on the floor slab with cement mortar. After construction is completed, dismantle the external scaffolding 2 and insulation layer according to the specifications.

[0057] Example 3

[0058] according to Figure 1 , 2 As shown in Figures 3, 4, 5, 6, and 7, this embodiment proposes a method for using a fully enclosed external scaffolding frame as an insulated shed during winter construction and its wind load resistance. This method is applied to the winter construction of a typical industrial frame structure in the region, where the average winter temperature is [missing information]. The average wind speed is The maximum wind speed can reach 10m / s, the construction frame is 10m high and 30m in circumference.

[0059] The specific implementation steps of the structure and method of this invention are as follows:

[0060] Erecting external scaffolding 2: Erect external scaffolding 2 around the concrete frame 1. The spacing between the uprights of external scaffolding 2 is 1.5m, and the step distance of the horizontal bars is 2.0m. Uprights and horizontal bars are only set around the frame, and no uprights are set on the floor. Coupler connection is used to ensure the overall stability of external scaffolding 2.

[0061] Install ventilation ducts 4: Along the height direction of the outer scaffold 2, set up one layer of ventilation duct 4 every 2.5m, for a total of 4 layers. Set up 2 ventilation ducts 4 on each side of the outer scaffold 2, evenly distributed along the perimeter. The cross-sectional dimensions of the ventilation duct 4 are 300mm×400mm. The inner formwork 41 of the ventilation duct is made of steel plate with a thickness of 4mm. The insulation cotton 42 is made of centrifugal glass wool with a thickness of 80mm. The waterproof membrane 43 is made of PVC waterproof membrane with a thickness of 0.4mm. Fix the assembled ventilation duct 4 to the outer scaffold 2 with bolts. Use steel pipe support frame to fix the ventilation duct 4 and the enclosure structure. Leave a construction passage with a width of 1.2m.

[0062] Installation of internal support structure: The formwork 7 for the concrete floor slab is made of film-coated plywood, and the uprights 51 of the internal support structure 5 are made of... Steel pipes, spaced 1.8m apart, with horizontal bar 6 using... The steel pipe has a step distance of 2.0m. The steel pipe waterstop wing plate 52 is made of round steel plate with a thickness of 8mm and a diameter of 150mm. It is fully welded to the upright 51 with a weld height of 3.5mm. The upright 51 is set through the template 7 to ensure that the steel pipe waterstop wing plate 52 is located below the template 7 and can be embedded in the subsequently poured concrete. The inner upright support structure is only used to support the top covering quilt 8 and is not connected to the outer scaffold 2 support frame.

[0063] Insulation layer installation: The insulation quilt 3 is made of flame-retardant rock wool quilt with a thickness of 120mm. Multiple pieces are spliced ​​together and fixed to the outside of the outer scaffold 2 with galvanized iron wire. The binding spacing is 450mm. A 50mm thick fireproof rock wool board is laid between the insulation quilt 3 and the outer scaffold 2 as a fireproof isolation layer. The top covering quilt 8 is made of the same material as the insulation quilt 3. After being laid, it is sealed and connected with the surrounding insulation quilt 3 to form a fully enclosed insulation space. The part of the air passage 4 that enters the insulation shed is further wrapped with insulation quilt for insulation.

[0064] Wind load calculation and adjustment: The wind load is calculated using the algorithm formula of this invention, and the parameters of the wind passage 4 are adjusted to ensure structural stability;

[0065] Construction process maintenance and post-construction treatment: During construction, regularly inspect the external scaffolding 2, ventilation passage 4, insulation layer and internal upright support structure, and deal with damage, loosening and other problems in a timely manner; after the concrete floor slab is poured, when the concrete strength reaches 60% of the design strength, cut the upright 51, and seal the steel pipe holes on the floor slab with cement mortar. After the construction is completed, dismantle the external scaffolding 2 and insulation layer in accordance with the specifications.

[0066] Validation data:

[0067] Through practical applications of three embodiments and comparative tests with existing technologies, the present invention yielded the following data:

[0068]

[0069] As can be seen from the above data, this invention, through structural innovation and method optimization, has significantly improved upon existing technologies in terms of wind load unloading, thermal insulation stability, and structural safety. It can effectively adapt to the winter construction needs of different frigid regions and solve many defects of existing technologies.

[0070] The air passage 4 of this invention penetrates the outer scaffold 2 and the insulation layer, employing a composite structure of inner template + insulation cotton + impermeable film. This achieves uniform unloading of wind load, effectively reducing the lateral pressure generated by wind load and ensuring the stability of the outer scaffold 2 and frame support. Furthermore, the insulation cotton 42 and impermeable film 43 prevent temperature loss and leakage at the air passage 4, balancing wind resistance and insulation performance, and improving wind load unloading efficiency and internal temperature stability. This invention adds dedicated inner uprights 5 for template support and steel pipe water-stop wing plates 52, solving the problems of unstable support for the existing top insulation cotton blanket and floor leakage. The inner uprights 5 for template support are only used to support the top covering cotton blanket 8 and are not connected to the outer scaffold 2 support frame, avoiding structural instability caused by mutual interference of the support system. The steel pipe water-stop wing plates 52 effectively block the seepage path, reducing the leakage risk rate by 100%. Simultaneously, the support stability of the top covering cotton blanket 8 is improved by 40%, preventing the cotton blanket from falling off and affecting the insulation effect. This invention employs a wind load calculation method and introduces a proprietary algorithm formula to achieve accurate calculation of wind loads and reasonable adjustment of structural parameters. It solves the problems of lacking effective wind load calculation methods and inaccurate control of structural stability in existing technologies. Through the algorithm formula, the impact of wind loads on scaffolding, wind passages, and internal support structures can be accurately calculated, providing data support for structural design and adjustment. This increases the structural wind resistance safety factor to over 1.5, reducing the risk of structural instability by more than 50% compared to existing technologies. Furthermore, the combination of fireproof isolation layers further enhances construction safety.

[0071] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fully enclosed external scaffolding structure used as an insulated shed for winter construction, comprising a concrete frame (1), external scaffolding (2), insulation layer, ventilation channel (4), internal upright support structure, and floor slab formwork structure, characterized in that: The external scaffolding (2) is set around the concrete frame (1) to form a fully enclosed structure and serve as the skeleton of the insulation shed. The external scaffolding (2) is set with an inner upright support structure around the concrete frame (1). The insulation layer includes insulation cotton quilts (3) spliced ​​and fixed to the outside of the external scaffolding (2) and a top covering cotton quilt (8) covering the top of the insulation shed. The top covering cotton quilt (8) and the surrounding insulation cotton quilts (3) form a fully enclosed insulation space. The ventilation channel (4) is set through the outer scaffold (2) and the insulation layer, including a square strip-shaped inner template (41), insulation cotton (42) wrapped around the outer side of the inner template (41), and an impermeable film (43) wrapped around the outer side of the insulation cotton (42); the inner upright support structure includes an inner upright (5) of the template support and a horizontal bar (6) connecting the inner upright (5) of the template support. The inner upright (5) of the template support is used to support the top covered with cotton quilt (8). The inner upright (5) of the template support includes an upright (51) and a steel pipe waterstop wing plate (52) fixed at the bottom of the upright (51) and embedded in the concrete; the floor slab template structure includes a template (7) of the concrete floor slab. The inner upright (5) of the template support is set through the template (7). After the concrete is poured, the upright (51) is cut off and the steel pipe hole of the floor slab is sealed.

2. The fully enclosed external scaffolding used as an insulation shed for winter construction as described in claim 1, characterized in that: The ventilation channels (4) are evenly spaced along the height direction of the outer scaffold (2), with an adjacent spacing of 1.5-2.5m. They are evenly distributed along the perimeter of the outer scaffold (2), with at least two ventilation channels (4) on each side of the outer scaffold (2). The cross-sectional dimensions of the ventilation channels (4) are 300mm×400mm-500mm×600mm.

3. The fully enclosed external scaffolding used as an insulation shed for winter construction as described in claim 1, characterized in that: A fireproof isolation layer is set between the thermal insulation quilt (3) and the external scaffold (2). The fireproof isolation layer is made of fireproof rock wool board with a thickness of 50-80mm. The thermal insulation quilt (3) is fixed to the uprights and horizontal bars of the external scaffold (2) by galvanized iron wire, with a binding spacing of no more than 500mm.

4. The fully enclosed external scaffolding used as an insulation shed for winter construction as described in claim 1, characterized in that: The steel pipe waterstop wing plate (52) is made of round steel plate with a thickness of 8-12mm and a diameter of 150-200mm. The steel pipe waterstop wing plate (52) and the upright (51) are connected by full welding, and the height of the weld is not less than the wall thickness of the upright (51).

5. A method for resisting wind loads on a fully enclosed external scaffolding used as an insulated shed during winter construction, applied to the fully enclosed external scaffolding used as an insulated shed during winter construction as described in any one of claims 1-4, characterized in that: Includes the following steps: S1: Build an external scaffold (2) around the concrete frame (1), and set up vertical and horizontal poles around the frame; S2: Evenly leave ventilation channels (4) on the external scaffold (2), assemble and fix the template (41), insulation cotton (42) and waterproof membrane (43) inside the ventilation channel, use support frame to fix the ventilation channel (4) and enclosure structure, and leave construction channel; S3: Install the inner uprights (5) of the formwork support through the formwork (7) of the concrete floor slab, fix the steel pipe waterstop wing plate (52) and ensure that it can be embedded in the concrete, and connect the horizontal bar (6) to form the inner upright support structure. S4: Splice and lay the insulation quilt (3) and cover the top with quilt (8) to form a fully enclosed insulation space. Wrap the part of the air passage (4) that enters the insulation shed for insulation. S5: Calculate wind load and the bearing capacity of the internal support structure through algorithms, and adjust structural parameters to ensure stability; S6: Maintain the integrity of the structure during construction. After the concrete is poured, cut off the uprights (51) and seal the steel pipe holes. Then dismantle the insulation shed and scaffolding.

6. The method for resisting wind loads using a fully enclosed external scaffolding as an insulation shed during winter construction, as described in claim 5, is characterized in that: In S2, the assembly sequence of the ventilation channel (4) is as follows: first, install the inner template (41) of the ventilation channel, then wrap the outer side with insulation cotton (42), and finally wrap the inner side with a waterproof membrane (43). The ventilation channel (4) is fixed to the outer scaffold (2) with bolts. The width of the construction channel is 1.2-1.5m.

7. A method for resisting wind loads using a fully enclosed external scaffolding as an insulation shed during winter construction, as described in claim 5, is characterized in that: In S5, the wind load calculation uses the following algorithm formula: ， Where: Wk is the standard value of wind load. , refers to the wind load per unit area acting on the surface of the external scaffolding and insulation shed; The wind vibration coefficient at height z is determined based on the height of the construction frame, and its value ranges from 1.0 to 1.

8. The higher the frame, the greater the wind vibration coefficient. The larger the value; This is the wind load shape coefficient. For fully enclosed external scaffolding insulation sheds, the value is taken as 0.8-1.

2. The denser the air passage arrangement, the better. The smaller the value; This is the wind pressure height variation coefficient, determined based on the ground roughness category of the construction area. In open areas, the value is 0.7-1.5; the higher the altitude, the greater the variation. The larger the value, the greater; W0 is the basic wind pressure. The value was determined based on meteorological data from the construction area. .

8. A method for resisting wind loads using a fully enclosed external scaffolding as an insulation shed during winter construction, as described in claim 7, is characterized in that: In S5, the load-bearing capacity calculation of the inner upright support structure adopts the following algorithm formula: ， Where: Nmax is the maximum axial force (kN) of the upright (51), which refers to the maximum resultant force borne by the upright on the top covering quilt (8) and its own weight; Qk is the standard value of the uniformly distributed live load of the top covering quilt (8). The value is Gk is the standard value of the self-weight of the inner upright support structure (kN / m), which is calculated and determined according to the specifications and spacing of the upright (51) and horizontal bar (6); A is the cross-sectional area of ​​the upright (51). The value is determined by calculation based on the diameter and wall thickness of the upright steel pipe; f is the design value of the compressive strength of the upright (51). ,use When using steel pipes, f takes the value of .

9. A method for resisting wind loads using a fully enclosed external scaffolding as an insulation shed during winter construction, as described in claim 5, is characterized in that: In S6, the construction process maintenance includes checking the integrity of the external scaffolding (2), ventilation passage (4), insulation layer and internal upright support structure every day, tightening loose parts in time, replacing damaged insulation materials and waterproof membrane (43), suspending construction and reinforcing the structure in windy weather.

10. A method for resisting wind loads using a fully enclosed external scaffolding as an insulation shed during winter construction, as described in claim 9, characterized in that: In S6, after the concrete floor slab is poured, when the concrete strength reaches 60%-80% of the design strength, the uprights (51) are cut off, the steel pipe holes on the floor slab are sealed with cement mortar, and the external scaffolding (2) and insulation layer are dismantled step by step from top to bottom according to the specifications.

Images