Sliding construction device for cast-in-place roof arch bar and using method

Abstract

The invention relates to the technical field of cast-in-place construction, and discloses a cast-in-place roof arch bar sliding construction device which comprises two supporting seats and a hydraulic propeller which are installed on a roof top beam, and the two supporting seats are symmetrically distributed to form a conveying frame matched with an arch bar body. A plurality of cylindrical rollers evenly distributed in the length direction of the supporting seats are installed on the supporting seats, the bottom of the arch slab body stretches across the two supporting seats, the bottom plane of the arch slab body is in rolling connection with the cylindrical rollers, and the movable ends of the hydraulic propellers are arranged at the bottoms of the two ends of the arch slab body. Through the combination of the hydraulic oil cylinders and the hydraulic push rods of the hydraulic propellers, stable sliding of the arch slab body is achieved, thrust output of the hydraulic push rods is stable, the sliding speed can be accurately adjusted according to construction requirements, quick starting and stopping can be achieved at any position, the inertial sliding distance is thoroughly eliminated, the positioning error is small, and therefore the actual construction positioning accuracy is improved, and the construction efficiency is improved. Construction time is saved, and construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cast-in-situ construction, and in particular to a sliding construction device for a cast-in-situ roof arch plate and a use method thereof. Background Art

[0002] When installing roof arch panels, the traditional method is hoisting installation. However, the span of concrete arch panels is large, usually up to tens of meters. If a crane is used to hoist the arch panels directly to the installation location, the concrete arch panels may crack or even break due to uneven force, which will seriously damage the structural stability of the entire concrete arch panel.

[0003] In order to solve the above problems, after the concrete arch slab is prefabricated at a high place, the existing operation is mostly to lift the arch slab onto the adjacent slide rail by a crane, and then cooperate with the sliding construction process to move it to the specified position by sliding, and start and brake it by winch traction. However, due to inertia during movement, the arch slab will have a certain sliding distance, and it is difficult to accurately control the sliding position, which increases the construction time and reduces the construction efficiency. Therefore, a sliding construction device for cast-in-place roof arch slabs is needed to meet actual construction needs. Summary of the Invention

[0004] In order to solve the technical problems existing in the background technology, the present invention provides a sliding construction device and a use method of a cast-in-place roof arch plate.

[0005] The present invention proposes a sliding construction device for a cast-in-place roof arch panel, comprising a support seat and a hydraulic thruster mounted on a roof beam. The support seats are two and symmetrically distributed to form a conveying frame adapted for the main body of the arch panel. The support seats are mounted with a plurality of cylindrical rollers evenly distributed along their length. The bottom of the main body of the arch panel spans over the two support seats, and the bottom plane of the main body of the arch panel is in rolling connection with the cylindrical rollers. The movable ends of the hydraulic thruster are disposed at the bottom ends of the main body of the arch panel, and the movable path of the hydraulic thruster is parallel to the length direction of the support seat. In response to the problems of traditional lifting being prone to cracking and winch sliding and positioning being difficult, this device forms a rolling support system through a symmetrical support seat and a cylindrical roller. The cylindrical roller is made of steel and surface hardened. The rolling friction coefficient is only 0.02, which is more than 90% lower than the traditional sliding friction resistance. The hydraulic thruster provides stable thrust through a combination of hydraulic cylinders and hydraulic push rods, which can accurately control the sliding speed, avoid inertial sliding, reduce positioning errors, and thus improve construction accuracy.

[0006] As a further optimized solution of the present invention, the hydraulic thruster includes a bracket fixed to the upper surface of one end of the roof beam, one end of the bracket is slidably equipped with a base, and a hydraulic cylinder for supporting the end of the arch plate body is installed on the base, and a hydraulic push rod is fixed to the other end of the bracket, and the movable end of the hydraulic push rod is fixed to the base; The hydraulic thruster adopts a four-stage linkage structure of "bracket + base + hydraulic cylinder + hydraulic push rod". The hydraulic cylinder has a stroke of 500mm and can raise and lower the support plate to adjust the height of the arch plate. The hydraulic push rod has a stroke of 2000mm and provides a maximum thrust of 500kN. For example, when sliding an arch plate with a span of 30m, the hydraulic push rod is used to push it in sections, with each section being 2m, to ensure that the arch plate is evenly stressed and avoid stress concentration.

[0007] As a further optimized solution of the present invention, the movable end of the hydraulic cylinder faces upward and is installed with a support plate, and the upper end surface of the support plate has an anti-slip layer for supporting the bottom of the arch plate body; The anti-skid layer of the support plate is made of rubber and has cross-shaped anti-skid grooves on its surface. This increases the friction with the bottom of the arch plate and prevents slipping during movement. For example, when constructing a roof with a slope of 5°, the anti-skid layer can provide sufficient anti-skid force to ensure stable sliding of the arch plate. Furthermore, when the hydraulic cylinder drives the support plate to move up to the highest point, the upper end surface of the support plate is flush with the upper end surface of the cylindrical roller; The flush design (error ≤ 1mm) ensures that the arch plate is subjected to stable force during support switching, avoiding impact loads caused by height differences. For example, when the support plate rises to be flush with the rollers, the arch plate load is gradually transferred from the rollers to the support plate, and then pushed by the hydraulic push rod to achieve impact-free sliding, protecting the safety of the arch plate structure.

[0008] As a further optimized solution of the present invention, the bracket is L-shaped, the long side of the L-shaped bracket is fixed to the upper end surface of the roof beam and has a slide groove adapted to the base, the short side of the L-shaped bracket is perpendicular to the roof beam, and the hydraulic push rod is fixed to the outside of the L-shaped short side and the movable end extends above the long side of the L-shaped; The L-shaped bracket slides with the base through a slide groove to ensure that the thrust direction of the hydraulic push rod is consistent with the sliding direction. In complex roof structures, the L-shaped bracket can adapt to different installation angles and enhance the environmental adaptability of the device.

[0009] As a further optimized solution of the present invention, a baffle is installed on the side of the bracket away from the support seat, the baffle is parallel to the support seat, and the inner side of the baffle is slidably connected to the outer wall of the end of the arch plate body; The baffle is made of 10mm thick steel plate with a polyethylene wear-resistant plate pasted on the inner side. There is a gap of 5-8mm between the baffle and the end of the arch plate, which acts as a lateral limit to prevent the arch plate from shifting during sliding (offset ≤ 10mm). For example, in an environment with wind speed ≤ level 4, the baffle can effectively suppress the lateral displacement of the arch plate and ensure the accuracy of the sliding path.

[0010] As a further optimized solution of the present invention, the number of the hydraulic thrusters is two, and the two hydraulic thrusters are respectively arranged on the side of one end of the two support seats; The synchronous driving of the double-sided hydraulic thrusters can balance the thrust on both sides of the arch plate and avoid torsional deformation caused by unilateral force. For example, for an arch plate wider than 6m, the double-sided thrust can control the sliding speed difference on both sides to within 0.05m / min, ensuring smooth movement of the arch plate.

[0011] As a further optimized solution of the present invention, the upper end surface of the support seat is provided with a strip groove arranged along its length direction, and the cylindrical roller is rotatably installed in the strip groove, and the axis of the cylindrical roller is perpendicular to the sliding direction of the arch plate body; The strip groove allows the roller to rotate freely, with the axis perpendicular to the sliding direction, ensuring that the arch plate slides in a straight line. For example, the roller spacing is evenly distributed at 500mm, which can make the spacing between the support points at the bottom of the arch plate reasonable and reduce the mid-span deflection (deflection ≤ L / 1000, L is the span of the arch plate).

[0012] As a further optimized solution of the present invention, symmetrically distributed support members are installed on the upper end surface of the roof beam, and the support members replace the cylindrical rollers to support the arch plate body after the arch plate body has slid. The support is made of H-shaped steel (model H200×200×8×12), fixed to the roof beam by high-strength bolts (grade 10.9), with a load-bearing capacity of ≥200kN. After the sliding is completed, the support is quickly replaced with rollers to form a permanent support. The support seat can be pulled out and recycled, increasing the steel utilization rate by 60% and reducing the construction cost by 30%.

[0013] A method for using a sliding construction device for a cast-in-place roof arch plate is characterized by comprising the following specific steps: S1 uses a crane to place the arch plate body on the support seat at the upper end of the roof beam, so that the bottom of the arch plate body is supported by the cylindrical roller; S2 starts the hydraulic thruster, causing the hydraulic cylinder to drive the support plate to support the bottom of both ends of the arch plate body, and then drives the base and the hydraulic cylinder to move horizontally through the hydraulic push rod, thereby driving the arch plate body on it to slide along the support seat; S3: When the movable end of the hydraulic push rod moves to the longest path, the arch plate body stops sliding on the support seat. At this time, the hydraulic cylinder resets to drive the support plate to move downward, and the hydraulic push rod moves back and resets. Repeat the operation to place the second arch plate body. When the hydraulic push rod in step S4 pushes the second arch plate body, the second arch plate body contacts the first arch plate body and pushes the first arch plate body forward until the movable end of the hydraulic push rod moves to the longest path again, and the steps in step S3 are repeated to achieve the sequential placement and sliding of multiple arch plate bodies; S5 inserts the support member between the roof top beam and the arch plate body and fixes it with fasteners to support the bottom of the arch plate body, and then pulls out the support seat to complete the sliding installation of the arch plate body.

[0014] This method adopts the "segmented pushing + relay sliding" mode, and the sliding time of a single arch plate is shortened by 50% compared with the traditional process. For example, when installing 10 arch plates with a span of 30m, 9 repeated positioning can be reduced through relay pushing, which saves a total of about 8 hours of time. The installation of support parts and the disassembly of support seats are carried out simultaneously, realizing seamless connection of the construction process and improving overall efficiency.

[0015] The sliding construction device and method for using the cast-in-situ roof arch plate proposed in the present invention have the following beneficial effects: (1) This application realizes the smooth sliding of the arch plate body through the combination of the hydraulic cylinder and hydraulic push rod of the hydraulic thruster. The thrust output of the hydraulic push rod is stable, the sliding speed can be accurately adjusted according to the construction requirements, and it can be quickly started and stopped at any position, completely eliminating the inertial sliding distance. The positioning error is small, thereby improving the actual construction positioning accuracy, saving construction time, and improving construction efficiency; (2) The cylindrical rollers on the support seat are arranged vertically along the sliding direction. The bottom of the arch plate body is in rolling contact with the rollers, resulting in a low friction coefficient and significantly reduced friction resistance compared to traditional sliding. This design enables the hydraulic thruster to push the heavier arch plate body, significantly reducing energy consumption compared to a winch. At the same time, the uniform distribution of the rollers ensures that the arch plate is evenly stressed, avoiding the risk of cracking due to local stress concentration and ensuring structural stability. (3) After the arch plate slides into place, the support replaces the cylindrical roller support and is made of high-strength steel, thereby increasing the load-bearing capacity of the support. It is then fixed to the roof beam with fasteners, which is quick to install and can shorten the installation time. The support base can be quickly withdrawn and recycled. Compared with traditional fixed support structures, it can reduce the amount of steel used and avoid high-altitude welding operations, thereby improving construction safety and significantly accelerating the construction progress. (4) The hydraulic pusher can push multiple arch panels in sequence. When the second arch panel contacts the first one, the continuous thrust of the hydraulic push rod can drive the positioned arch panels to move forward synchronously without the need for additional traction devices. This "relay" sliding mode is suitable for large-area roof construction and can effectively improve construction efficiency and shorten the construction period.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure from a first perspective of a sliding construction device for a cast-in-place roof arch plate proposed by the present invention; Figure 2 This is a schematic diagram of the third perspective structure of a sliding construction device for a cast-in-place roof arch plate proposed by the present invention; Figure 3This is a schematic diagram of the support structure of a sliding construction device for a cast-in-place roof arch plate proposed by the present invention; Figure 4 For the present invention Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0018] In the figure: 1. Roof beam; 2. Support seat; 3. Cylindrical roller; 4. Arch plate body; 5. Hydraulic thruster; 501. Base; 502. Hydraulic cylinder; 503. Support plate; 504. Hydraulic push rod; 6. Support member. DETAILED DESCRIPTION

[0019] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention, and are not to be construed as limiting the present invention.

[0020] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0021] In the construction of cast-in-place roof arch panels, traditional hoisting processes can easily lead to cracking of the arch panels due to uneven force, while winch sliding construction has problems such as insufficient positioning accuracy and difficult to control inertial sliding. The cast-in-place roof arch panel sliding construction device provided by the present invention achieves smooth sliding and precise positioning of the arch panels through the innovative combination of hydraulic drive and rolling support, effectively improving construction safety and efficiency. The specific implementation method is as follows: like Figure 1 and Figure 2 As shown, the basic structure of the device is based on the roof beam 1 as the support carrier, on which two support bases 2 are symmetrically arranged to form a conveyor structure adapted to the arch plate body 4. The upper end surface of the support base 2 is provided with a strip groove along the length direction, and multiple cylindrical rollers 3 are evenly installed in the groove, whose axes are perpendicular to the sliding direction of the arch plate; The cylindrical roller 3 is made of surface-hardened steel (hardness HRC45-50), with a rolling friction coefficient as low as 0.02, which is more than 90% lower than the traditional sliding friction resistance. When the arch plate body 4 spans the two support seats 2, its bottom plane is in rolling contact with the cylindrical roller 3. This design not only greatly reduces the sliding resistance, but also ensures uniform force on the bottom of the arch plate through the 500mm roller spacing, and controls the mid-span deflection within L / 1000 (L is the arch plate span), effectively avoiding the risk of cracking due to local stress concentration.

[0022] like Figure 2 and Figure 4 As shown, the hydraulic thruster 5 serves as the power core of the device, and its structure includes an L-shaped bracket fixed to the roof beam 1, a base 501 slidably assembled with the bracket slide, a hydraulic cylinder 502 installed on the base 501, and a hydraulic push rod 504 fixed to the short side of the bracket; A support plate 503 with an anti-skid rubber layer is installed at the movable end of the hydraulic cylinder 502. The cross-shaped anti-skid groove design on the surface of the rubber layer gives it a friction coefficient of 0.6, which can provide a 1.5-fold anti-skid safety factor on a roof with a 5° slope. When the hydraulic cylinder 502 drives the support plate 503 to rise to the same level as the cylindrical roller 3, the arch plate load is smoothly transferred to the support plate 503. The hydraulic push rod 504 then pushes the base 501 to slide at an adjustable speed of 0.1-1m / min. Its maximum thrust of 500kN and accuracy of ±5kN can control the positioning error to ≤5mm, completely eliminating the inertial sliding problem of traditional processes. The synchronous driving of the hydraulic thrusters 5 on both sides (synchronization error ≤ 1%) can balance the thrust on both sides of the arch plate, avoiding torsional deformation of the arch plate with a width exceeding 6m due to unilateral force.

[0023] like Figure 3 As shown, the support member 6 is made of H200×200×8×12 steel and is fixed to the roof beam 1 with 10.9-grade high-strength bolts. The load-bearing capacity of a single group is ≥200kN. After the arch plate slides into place, the support member 6 replaces the cylindrical roller 3 to form a permanent support. The support base 2 can be quickly withdrawn and recycled. The steel utilization rate is increased by 60%, and high-altitude welding operations are avoided, shortening the construction period. Furthermore, a baffle is installed on the outside of the bracket (not shown in the figure). The baffle is a 10mm thick steel plate lined with a 5mm polyethylene wear-resistant plate. A gap of 5-8mm is maintained between the baffle and the end of the arch plate, which can effectively suppress lateral deviation under wind speed ≤4 (offset ≤10mm) and ensure the accuracy of the sliding path.

[0024] During the construction process, the arch plate body 4 is first placed on the cylindrical roller 3 of the support seat 2 by a crane, and the side positioning is completed by using a baffle. Then, the hydraulic cylinder 502 is activated to make the support plate 503 bear the load. The hydraulic push rod 504 pushes the arch plate to slide in steps of 2m. After reaching the maximum stroke, the cylinder resets and the push rod retracts, completing a single push. During the construction of multiple arch panels, subsequent arch panels push the positioned arch panels forward synchronously through contact, forming a "relay" sliding mode, which can reduce 90% of the repeated positioning time. After all the arch panels are in place, the support members 6 are installed and the support seats 2 are pulled out to complete the permanent support switching. Taking a 30m span arch panel as an example, the time taken for sliding a single panel is shortened by 50% compared with the traditional process. Ten panels can save a total of about 8 hours, and construction efficiency is significantly improved.

[0025] This invention utilizes precise hydraulic propulsion, low-resistance support from cylindrical rollers, and rapid support member conversion to create a safe and efficient arch-slab sliding construction system. Its core structure not only overcomes the technical bottlenecks of traditional processes, but also enables the recycling of equipment through a modular design. This improves construction accuracy and safety while reducing costs and energy consumption. It is suitable for large-span roofing projects such as industrial plants and stadiums, and possesses significant engineering value and social benefits.

[0026] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A sliding construction device for a cast-in-place roof arch plate, comprising a support seat (2) and a hydraulic thruster (5) mounted on a roof top beam (1), characterized in that: The number of support seats (2) is two and they are symmetrically distributed to form a conveying frame adapted to the arch plate body (4). A plurality of cylindrical rollers (3) evenly distributed along the length direction of the support seat (2) are installed on the support seat (2). The bottom of the arch plate body (4) spans over the two support seats (2), and the bottom plane of the arch plate body (4) is rollingly connected to the cylindrical rollers (3). The movable ends of the hydraulic thrusters (5) are arranged at the bottoms of both ends of the arch plate body (4), and the movable path of the hydraulic thrusters (5) is parallel to the length direction of the support seat (2).

2. The sliding construction device for cast-in-situ roof arch plate according to claim 1, characterized in that: The hydraulic thruster (5) comprises a bracket fixed to the upper surface of one end of the roof beam (1); one end of the bracket is slidably equipped with a base (501); a hydraulic cylinder (502) for supporting the end of the arch plate body (4) is installed on the base (501); a hydraulic push rod (504) is fixed to the other end of the bracket, and the movable end of the hydraulic push rod (504) is fixed to the base (501).

3. The sliding construction device for cast-in-situ roof arch plate according to claim 2, characterized in that: The movable end of the hydraulic cylinder (502) faces upward and is mounted with a support plate (503). The upper end surface of the support plate (503) has an anti-slip layer for supporting the bottom of the arch plate body (4).

4. The sliding construction device for cast-in-situ roof arch plate according to claim 2, characterized in that: When the hydraulic cylinder (502) drives the support plate (503) to move upward to the highest point, the upper end surface of the support plate (503) is flush with the upper end surface of the cylindrical roller (3).

5. The sliding construction device for cast-in-situ roof arch plate according to claim 2, characterized in that: The bracket is L-shaped, the L-shaped long side of the bracket is fixed to the upper end surface of the roof beam (1) and has a slide groove adapted to the base (501), the L-shaped short side of the bracket is perpendicular to the roof beam (1), and the hydraulic push rod (504) is fixed to the outside of the L-shaped short side and the movable end extends above the L-shaped long side.

6. The sliding construction device for cast-in-situ roof arch plate according to claim 3, characterized in that: A baffle is installed on one side of the bracket away from the support seat (2); the baffle is parallel to the support seat (2), and a compensating gap exists between the inner side surface of the baffle and the outer wall of the end of the arch plate body (4).

7. The sliding construction device for cast-in-situ roof arch plate according to claim 1, characterized in that: There are two hydraulic thrusters (5), and the two hydraulic thrusters (5) are respectively arranged on one end side of the two support seats (2).

8. The sliding construction device for cast-in-situ roof arch plate according to claim 1, characterized in that: The upper end surface of the support seat (2) is provided with a strip groove arranged along its length direction, and the cylindrical roller (3) is rotatably installed in the strip groove, and the axis of the cylindrical roller (3) is perpendicular to the sliding direction of the arch plate body (4).

9. A sliding construction device for cast-in-situ roof arch panels according to any one of claims 1 to 8, characterized in that: The upper end surface of the roof beam (1) is equipped with symmetrically distributed support members (6), and the support members (6) replace the cylindrical rollers (3) to support the arch plate body (4) after the arch plate body (4) has completed sliding.

10. A method for using a sliding construction device for a cast-in-place roof arch plate, characterized in that: The specific steps are as follows: S1 places the arch plate body (4) on the support seat (2) at the upper end of the roof beam (1) by means of a crane, so that the bottom of the arch plate body (4) is supported by the cylindrical roller (3); S2 starts the hydraulic thruster (5), so that the hydraulic cylinder (502) drives the support plate (503) to support the bottom of both ends of the arch plate body (4), and then drives the base (501) and the hydraulic cylinder (502) to move horizontally through the hydraulic push rod (504), thereby driving the arch plate body (4) thereon to slide along the support base (2); S3 When the movable end of the hydraulic push rod (504) moves to the longest path, the arch plate body (4) stops sliding on the support seat (2), and the hydraulic cylinder (502) resets to drive the support plate (503) to move downward, and the hydraulic push rod (504) moves back and resets. The operation is repeated to place the second arch plate body (4); When the hydraulic push rod (504) in step S4 pushes the second arch plate body (4), the second arch plate body (4) contacts the first arch plate body (4) and pushes the first arch plate body (4) forward until the movable end of the hydraulic push rod (504) moves to the longest path again, and the step of S3 is repeated to achieve the sequential placement and sliding of multiple arch plate bodies (4); S5 inserts the support member (6) between the roof beam (1) and the arch plate body (4) and fixes it with fasteners to support the bottom of the arch plate body (4), and then pulls out the support seat (2) to complete the sliding installation of the arch plate body (4).

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