Construction device for large-diameter inclined cylinder of airport special-shaped tower

Abstract

The utility model relates to based on airport heterotypic tower station big diameter inclined cylinder construction device technical field, and disclose a kind of based on airport heterotypic tower station big diameter inclined cylinder construction device, including formwork system and support reinforcement system, the formwork system is arc wood formwork, the support reinforcement system includes steel hoop, wood square, fastening wooden wedge, steel pipe, I-beam, steel pipe fastener and steel wire rope, adopt the composite reinforcement mode of'steel hoop, wooden frame and wooden wedge', in combination with multidirectional steel pipe and I-beam overhanging system, the stability of formwork support is significantly improved, effectively resist lateral pressure and impact load when concrete pouring, avoid formwork deformation or formwork explosion, each component positioning precision, connection reliable, improve the forming precision and construction quality of inclined cylinder, device assembly and disassembly are convenient, construction step is orderly, improve construction efficiency, applicable to high-altitude heterotypic structure inclined cylinder efficient construction.

Description

Technical Field

[0001] This utility model relates to the field of construction technology for large-diameter inclined cylindrical structures in airport irregular-shaped control towers, specifically a construction device based on large-diameter inclined cylindrical structures in airport irregular-shaped control towers. Background Technology

[0002] With the increasing demands for building functionality and aesthetics, irregular structures are being used more and more widely in public buildings. Airport irregular control towers often adopt a large number of inward and outward inclined cylindrical designs to balance the structural stability requirements of air traffic control with the needs of architectural aesthetics.

[0003] However, the construction of inclined cylindrical columns presents significant challenges. Their inclined characteristics lead to uneven distribution of lateral pressure during concrete pouring, which can easily cause local deformation of the formwork or even formwork bursting, affecting the forming accuracy and structural safety of the components. At the same time, the ultra-high-altitude construction environment of the tower places stringent requirements on formwork reinforcement and pouring technology. Utility Model Content

[0004] The purpose of this invention is to provide a construction device for a large-diameter inclined cylindrical structure based on an irregularly shaped airport control tower, which solves the problem in the prior art (the uneven distribution of lateral pressure during concrete pouring due to the inclined characteristics). To solve the above-mentioned technical problems, this utility model provides the following technical solution: A construction device for a large-diameter inclined cylindrical column in an airport control tower includes a formwork system and a support and reinforcement system. The formwork system is an arc-shaped wooden formwork. The support and reinforcement system includes steel clamps, timber, fastening wedges, steel pipes, I-beams, steel pipe fasteners, and steel wire ropes. The steel clamps are spaced axially along the outer side of the arc-shaped wooden formwork. The timber is placed outside the steel clamps. The fastening wedges are wedged into the gap between the timber and the arc-shaped wooden formwork. The steel pipes are arranged circumferentially along the inclined cylindrical column and locked with steel pipe fasteners. I-beam cantilever beams are placed on the floor slabs on both sides of the inwardly inclined column, and a connecting beam is provided between the two cantilever beams. The connecting beam and the cantilever beam are locked with steel wire ropes, and steel pipe diagonal braces are provided on the connecting beam.

[0005] Preferably, the steel clamp is composed of steel strips and bolts, and is axially spaced along the outer side of the arc-shaped wooden template to form a closed constraint structure.

[0006] Preferably, the timber is arranged along the axial direction of the inclined cylinder, with the timber of the inclined column located inside the inclined cylinder and the timber of the outclined column located outside the inclined cylinder, and multiple timbers are evenly distributed as a group.

[0007] Preferably, four steel pipes are evenly arranged along the circumference of the inclined cylinder. The inner side of the outward-inclined column is provided with a steel pipe diagonal tie rod, and the inner side of the inward-inclined column is provided with two steel pipe diagonal tie rods. The diagonal tie rods are connected to the surrounding frame through swivel couplers.

[0008] Preferably, the steel clamp is composed of a steel strip and bolts, and the difference in lateral pressure of the concrete is offset by adjusting the preload of the bolts.

[0009] Preferably, the wedging angle of the fastening wooden wedge is consistent with the inclination angle of the inclined cylinder, forming a composite reinforcement mode of rigid constraint and elastic compensation.

[0010] Preferably, the connecting beam is an I-beam, and the steel pipe bracing on the connecting beam is a steel pipe. The two ends of the bracing are connected to the connecting beam and the surrounding frame respectively, forming an anti-overturning rigid triangular support.

[0011] Compared with the prior art, the beneficial effects achieved by this utility model are: 1. The composite reinforcement mode of "steel hoops, wooden beams and wooden wedges" is adopted, combined with multi-directional steel pipes and I-beam cantilever system, which significantly improves the stability of formwork support, effectively resists the lateral pressure and impact load during concrete pouring, and avoids formwork deformation or bursting.

[0012] 2. The precise positioning and reliable connection of each component improve the forming accuracy and construction quality of the inclined cylinder.

[0013] 3. The device is easy to assemble and disassemble, and the construction steps are orderly, which improves the construction efficiency and is suitable for the efficient construction of high-altitude irregular-shaped inclined cylindrical structures. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the side structure of this utility model; Figure 2 This is a schematic diagram of the steel pipe structure in this utility model; Figure 3 This is a schematic diagram of the steel wire rope in this utility model; Figure 4 This is a schematic diagram of the structure of the arc-shaped wooden template in this utility model; Figure 5 This is a schematic diagram of the timber structure in this utility model; Figure 6 This is a structural schematic diagram of the steel pipe fastener in this utility model.

[0015] The components include: 1. Formwork system; 2. Support and reinforcement system; 3. Curved wooden formwork; 4. Steel clamps; 5. Timber; 6. Fastening wooden wedges; 7. Steel pipes; 8. I-beams; 9. Steel pipe fasteners; 10. Steel wire ropes; 11. Diagonal braces; 12. Diagonal tie rods. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-6 A construction device for large-diameter inclined cylindrical columns in airport irregular-shaped control towers is proposed. Through the design of "precise formwork forming + multi-level reinforcement collaboration", it solves the problems of formwork deformation and bursting caused by uneven distribution of concrete lateral pressure during the construction of inclined cylindrical columns. The core solution is as follows: the circular arc wooden formwork 3 is used as the basic mold for forming the inclined cylindrical column. The first radial constraint is formed by steel clamps 4, wooden squares 5, and fastening wooden wedges 6. The circumferential steel pipes 7 and the diagonal tie rods 12 form the second multi-directional reinforcement. The I-beams 8 cantilever beams, connecting beams, and steel pipes 7 diagonal braces 11 form an anti-overturning system. The overall stability is enhanced by locking with steel wire ropes 10. The construction method is carried out in an orderly manner according to the steps of "formwork construction - layered reinforcement - anti-overturning strengthening", which ensures high forming accuracy and structural safety and reliability of the inclined cylindrical column in ultra-high-altitude construction. This device is suitable for the construction of inward and outward inclined cylindrical columns in large buildings such as airport irregular-shaped control towers, and can especially cope with the complex working conditions of large-diameter inclined cylindrical columns.

[0018] The arc-shaped wooden formwork 3 serves as the foundation for the sloping cylindrical column. It is made of multi-layer plywood pressed into an arc shape, with a smooth surface (roughness Ra≤3.2μm). The joints are equipped with tongue and groove joints (concave-convex fit), and are connected into a whole by self-tapping screws to form a closed mold that matches the design curvature of the sloping cylindrical column. The inner side of the arc-shaped wooden formwork 3 is coated with a release agent (water-based release agent) to facilitate demolding after concrete molding and reduce surface honeycomb pitting.

[0019] The splicing accuracy of the arc-shaped wooden formwork 3 directly affects the forming quality of the inclined cylindrical column. The tongue and groove design can prevent grout leakage during concrete pouring. The arc-shaped wooden formwork 3 has a certain degree of elasticity, which can adapt to the slight expansion of the concrete during initial setting and reduce the occurrence of cracks. The length of the arc-shaped wooden formwork 3 is divided according to the construction section, which facilitates high-altitude hoisting and splicing. The two ends of each section of the arc-shaped wooden formwork 3 are reserved with steel clamps 4 installation grooves to provide stress points for subsequent reinforcement.

[0020] The support and reinforcement system 2 is the core for resisting the lateral pressure of concrete. It achieves stability of the arc-shaped wooden formwork 3 through multi-level constraints. The steel clamps 4 are composed of steel strips (Q235 steel plates) and high-strength bolts, and are arranged axially at intervals along the outer side of the arc-shaped wooden formwork 3. After the steel strips are wrapped around the arc-shaped wooden formwork 3, they are locked with bolts to form a closed ring constraint. The pre-tightening force of the bolts of the steel clamps 4 can be adjusted by a torque wrench. For the uneven lateral pressure caused by the inclination of the inclined cylinder (the pressure on the inner side is greater than that on the outer side), the pre-tightening force of the inner steel clamps 4 can be increased to compensate for it and avoid local bulging of the arc-shaped wooden formwork 3. A rubber pad is placed between the steel strip and the arc-shaped wooden formwork 3 to enhance the friction and prevent the steel clamps 4 from slipping, and to buffer the vibration and impact during concrete pouring, protecting the surface of the arc-shaped wooden formwork 3 from damage.

[0021] Timber 5 is larch timber, arranged along the axial direction of the inclined cylinder on the outside of the steel clamp 4. Timber 5 of the inward-inclined column is concentrated on the inside of the inclined cylinder (the area with greater lateral pressure), and timber 5 of the outward-inclined column is concentrated on the outside. Each group of timber 5 is evenly distributed at equal angles to evenly transfer the restraining force of the steel clamp 4 to the formwork.

[0022] The fastening wooden wedge 6 is a wedge-shaped block made of hardwood (such as oak). It is wedged into the gap between the wooden block 5 and the arc-shaped wooden template 3. The wedging angle is consistent with the inclination angle of the inclined cylinder (inward / outward inclination angle matching). The fastening wooden wedge 6 is tightened by hammering. On the one hand, it fills the gap between the wooden block 5 and the template, forming a rigid constraint. On the other hand, it uses the elastic deformation of the wood to generate a continuous pre-tightening force to compensate for the micro-deformation of the template 3 during the concrete pouring process, forming a composite reinforcement effect of "rigid constraint + elastic compensation" and reducing template displacement.

[0023] The steel pipe 7 is a Φ48×3.5mm welded steel pipe 7, with 4 pipes evenly arranged along the circumference of the inclined cylinder (corresponding to the position of the wooden block 5). They are connected to the wooden block 5 on the outside of the steel hoop 4 through right-angle fasteners to form a circumferential closed frame. The axially adjacent steel pipes 7 are connected by butt fasteners to form a vertical support that runs through the entire height.

[0024] For columns with different tilt types, special reinforcements are added: a single steel pipe diagonal brace 12 is installed on the inner side (tension zone) of the outward tilt column, one end of which is connected to the circumferential steel pipe 7 through a swivel coupler, and the other end is fixed to the surrounding scaffold frame. Double steel pipe diagonal braces 12 (arranged in parallel) are installed on the inner side (compression zone) of the inward tilt column to enhance the resistance to lateral displacement. The angle between the diagonal brace 12 and the horizontal plane is controlled at 45°-60°. Using the principle of triangle stability, the lateral pressure borne by the template 3 is transferred to the stable frame to avoid the overturning moment caused by the tilt of the inclined column, which would cause the template to shift.

[0025] One end of the I-beam 8 cantilever beam (I16 I-beam 8) is welded and fixed to the floor slab on both sides of the inward-sloping column through embedded parts, and the other end cantilevered outward to the outside of the inclined column. The cantilever length is determined according to the column position. I-beam 8 connecting beam (I12 I-beam 8) is welded between the two cantilever beams to form a laterally stable structure. The connecting beam and the cantilever beam are obliquely locked by steel wire rope 10 (the pretension of steel wire rope 10 is adjusted by turnbuckle) to counteract the downward deflection tendency of the cantilever beam.

[0026] Steel pipe 7 diagonal bracing 11 is installed on the connecting beam along the inclination direction of the inclined column. One end of the diagonal bracing 11 is connected to the connecting beam through a swivel coupler, and the other end is fixed to the surrounding scaffold uprights, forming a rigid triangular support of "cantilever beam-connecting beam-diagonal bracing 11", which further resists the overturning force during the construction of the inclination column.

[0027] S1: Setting up the template system 1 Based on the design radius and inclination angle of the inclined cylindrical column, three units of arc-shaped wooden formwork are prefabricated on the ground. Tongue and groove joints are processed at the joints of the three units. The three units are then hoisted to the construction floor using a tower crane and assembled into a whole according to the layout lines. The joints are secured with self-tapping screws, and the tongue and groove joints are filled with sealant (polyurethane sealant) to prevent grout leakage. Positioning rings (made of steel bars and concentric with the design center) are installed at the top and bottom of the three units to ensure that the axis of the three units is consistent with the design axis of the inclined cylindrical column, forming a precise mold for the inclined cylindrical column and providing a reference for subsequent concrete pouring.

[0028] S2: Install steel clamps 4 Mark the positions of the steel clamps 4 at intervals along the outer axial direction of the arc-shaped wooden formwork 3. Wrap the steel strip around the arc-shaped wooden formwork 3 once, insert high-strength bolts at the joints, and tighten them with a torque wrench to the designed pre-tightening force. Place rubber pads between the steel strip and the arc-shaped wooden formwork 3 to ensure a tight fit without gaps. Check the closure of each clamp to avoid local loosening. The ring constraint initially resists the lateral pressure of the concrete, providing the first layer of protection for the arc-shaped wooden formwork 3.

[0029] S3: Set up timber block 5 and wooden wedge. Wooden blocks 5 are arranged axially on the outside of the steel clamps 4 (4 blocks for each clamp, evenly distributed). The wooden blocks 5 are temporarily fixed to the steel clamps 4 with nails. Hardwood wedges 6 are made with the same inclination angle as the inclined cylinder and wedged into the gap between the wooden blocks 5 and the template. The wedges 6 are hammered until they are tight (the wooden blocks 5 should be slightly deformed) to ensure that the wooden blocks 5 are in full contact with the template 3. The depth of the wedges 6 is checked along the perimeter of the template 3 to avoid uneven force. The wooden blocks 5 disperse the constraint force of the steel clamps 4, and the wedges 6 fill the gaps and provide elastic compensation, thereby enhancing the overall rigidity of the template 3.

[0030] S4: Multi-directional steel pipe 7 reinforcement Four steel pipes 7 are arranged around the circumference of the template 3 and fixed to the timber 5 with right-angle couplers. The axial steel pipes 7 are connected into a whole by butt couplers. A single steel pipe diagonal tie rod 12 is installed on the inner side of the outward-inclined column, and a double steel pipe diagonal tie rod 12 is installed on the inner side of the inward-inclined column. The two ends of the diagonal tie rod 12 are connected to the circumferential steel pipes 7 and the surrounding scaffolding with swivel couplers. Adjust the tightness of the tie rod (it should be so that it cannot be moved by hand). Check the perpendicularity of the steel pipes 7 and the template 3 to ensure that the force transmission path is smooth and form a three-dimensional reinforcement network that combines circumferential and axial directions. The lateral pressure is transmitted to the stable frame to prevent local deformation of the template.

[0031] S5: I-beam 8-cantilever reinforcement Weld I-beams 8 cantilever beams onto the embedded parts of the floor slabs on both sides of the inward-inclined column. Temporarily support the cantilever ends with steel pipes 7. Weld I-beams 8 connecting beams between the two cantilever beams. The connecting beams and cantilever beams are locked together by steel wire ropes 10 (adjust the turnbuckles to tighten the steel wire ropes 10). Install steel pipe 7 diagonal braces 11 on the connecting beams, with one end connected to the connecting beams and the other end fixed to the surrounding scaffolding. Ensure that the diagonal braces 11 form a 50° angle with the horizontal plane. Remove the temporary supports and check the deflection of the cantilever system. The cantilever system resists the overturning moment of the inward-inclined column, enhancing the overall stability of high-altitude construction.

[0032] The closed constraint and pre-tightening force adjustment of the steel clamp 4 can specifically offset the large lateral pressure on the inner side of the inclined cylinder. The cooperation between the wooden square 5 and the fastening wooden wedge 6 makes the constraint force evenly distributed, avoiding local stress concentration of the template 3. The circumferential steel pipe 7 and the diagonal tie rod 12 form a multi-directional constraint of "circumferential + radial", which effectively transfers the lateral pressure borne by the template 3 to the surrounding frame.

[0033] The I-beam 8 cantilever beam and the connecting beam are locked together by steel wire rope 10 to form a cantilever anti-pull system, which can resist the upward pull force generated during the construction of the inward-inclined column. The triangular support composed of steel pipe diagonal braces 11 converts the overturning moment into axial force and transmits it to the floor slab. The formwork 3 and the reinforcement components are all modular designs, prefabricated on the ground and then hoisted and spliced, reducing the time spent working at height. Steel clamps 4, steel pipe fasteners 9, etc. can be reused to reduce construction costs.

[0034] Airport tower external tilting column construction The tower has an outward tilt angle of 15°, a cylindrical diameter of 1.2m, and a construction height of 30m.

[0035] The spacing of the steel clamps 4 is increased to 500mm, and the pretension of the outer clamps is increased to 500N·m (to offset the increased pressure on the outer side caused by the outward tilt). A single diagonal tie rod 12 is added to the inner side of the outward tilted column, forming a 60° angle with the ground to enhance the resistance to lateral displacement. The cantilever beam is 2m long, and the pretension of the steel wire rope 10 between the connecting beam and the cantilever beam is adjusted to 8kN to prevent the cantilever end from deflecting downward. There is no obvious deformation of the formwork during the concrete pouring process, and the surface flatness of the cylindrical column after molding is ≤3mm, which meets the design requirements.

[0036] The circular arc wooden formwork 3 is replaced with phenolic film-coated plywood, which is suitable for multiple turnovers of large-diameter inclined cylindrical columns. The steel clamps 4 use Q345 steel (with higher yield strength) and can withstand greater pre-tightening force. The "layered pouring + secondary vibration" process, combined with the reinforcement system of this device, can reduce concrete air bubbles and cracks and improve the structural strength of inclined cylindrical columns (compressive strength increased by 10%-15%).

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A construction device for a large-diameter inclined cylindrical structure based on an irregularly shaped airport control tower, characterized in that, include: The template system (1) and the support and reinforcement system (2) are as follows: the template system (1) is a circular arc wooden template (3); the support and reinforcement system (2) includes steel clamps (4), timber (5), fastening wooden wedges (6), steel pipes (7), I-beams (8), steel pipe fasteners (9) and steel wire ropes (10). The steel clamps (4) are axially spaced along the outside of the circular arc wooden template (3). The timber (5) is located outside the steel clamps (4). The fastening wooden wedges (6) are wedged into the gap between the timber (5) and the circular arc wooden template (3). The steel pipes (7) are arranged along the circumference of the inclined column and locked by the steel pipe fasteners (9). The cantilever beams of the I-beams (8) are located on the floor slabs on both sides of the inclined column, and there is a connecting beam between the two cantilever beams. The connecting beams and the cantilever beams are locked by steel wire ropes (10). There are steel pipe diagonal braces on the connecting beams.

2. The construction device based on a large-diameter inclined cylindrical structure for an airport irregular control tower according to claim 1, characterized in that: The steel clamp (4) is composed of steel strips and bolts, and is axially spaced along the outer side of the arc-shaped wooden template (3) to form a closed constraint structure.

3. The construction device based on a large-diameter inclined cylindrical structure for an airport irregular-shaped control tower according to claim 1, characterized in that: The timber (5) is arranged along the axial direction of the inclined cylinder. The timber (5) of the incline column is located inside the inclined cylinder, and the timber (5) of the outcline column is located outside the inclined cylinder. Multiple timbers (5) are evenly distributed as a group.

4. The construction device based on a large-diameter inclined cylindrical structure for an airport irregular-shaped control tower according to claim 1, characterized in that: The steel pipe (7) is evenly arranged in four directions along the circumference of the inclined cylinder. The inner side of the outward inclined column is provided with a steel pipe diagonal brace (12), and the inner side of the inward inclined column is provided with two steel pipe diagonal braces (12). The diagonal braces (12) are connected to the surrounding frame through rotating fasteners.

5. The construction device based on a large-diameter inclined cylindrical column for an airport irregular-shaped control tower according to claim 1, characterized in that: The steel clamp (4) is composed of steel strips and bolts, and the difference in concrete lateral pressure is offset by adjusting the bolt preload.

6. The construction device based on a large-diameter inclined cylindrical structure for an airport irregular control tower according to claim 1, characterized in that: The wedging angle of the fastening wooden wedge (6) is consistent with the inclination angle of the inclined cylinder, forming a composite reinforcement mode of rigid constraint and elastic compensation.

7. The construction device based on a large-diameter inclined cylindrical structure for an airport irregular control tower according to claim 1, characterized in that: The connecting beam is an I-beam (8), and the steel pipe bracing (11) on the connecting beam is a steel pipe (7). The two ends of the bracing (11) are connected to the connecting beam and the surrounding frame respectively, forming an anti-overturning rigid triangular support.

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