A device for dismantling a steel cover beam temporary support beam and a construction method

Abstract

This invention belongs to the field of steel structure construction technology, specifically relating to a device and construction method for dismantling the crossbeams of temporary supports for steel cap beams. It includes a sliding track fixedly installed at the bottom of each steel cap beam, a monorail trolley, and a sliding chain hoist. The sliding track is installed directly above the crossbeams of the temporary support. The monorail trolley is movably mounted on the sliding track, and the sliding chain hoist is suspended below the monorail trolley, with its free end connected to the crossbeam to be dismantled. The dismantling is completed through the steps of installing the sliding track and monorail trolley, connecting the sliding chain hoist to the crossbeam, tightening the sliding chain hoist, cutting and repositioning, and external lifting. This invention is suitable for construction in confined spaces, enabling the hoisting and repositioning of crossbeams without affecting existing surrounding structures.

Description

Technical Field

[0001] This invention relates to the field of steel structure construction technology, specifically to a device and construction method for dismantling the crossbeams of temporary supports for steel cap beams. Background Technology

[0002] In the construction of bridges, large steel structure buildings, and other projects, the installation of steel cap beams typically requires the erection of temporary scaffolding at the hoisting site to provide support for the hoisting, alignment, and fixation of the steel cap beams. Once the steel cap beams are installed and fixed to the main structure, the temporary scaffolding erected on site needs to be dismantled to complete the entire construction process of the steel cap beams.

[0003] In existing technologies, the removal of crossbeams in temporary supports for steel cap beams is often carried out by directly lifting them with a crane. However, in actual construction, the two sides of the temporary supports are often close to the existing structures, and the steel cap beams have already been hoisted and fixed above the supports. This results in a narrow construction space around the temporary supports, making it impossible for the crane boom to reach into this narrow space to lift the crossbeams. Consequently, the removal of the temporary supports cannot be completed smoothly, which seriously affects the construction progress. Summary of the Invention

[0004] The present invention addresses the problems mentioned above by designing a device and construction method for dismantling the crossbeams of temporary supports for steel cap beams, thereby overcoming the deficiencies of the prior art.

[0005] To achieve the above objectives, the present invention provides a device for dismantling the crossbeams of temporary supports for steel cap beams, comprising a sliding rail fixedly installed at the bottom of each steel cap beam, a monorail trolley, and a sliding chain hoist. The installation position of the sliding rail corresponds to the top of the crossbeams of the temporary supports for the steel cap beams. The monorail trolley is movably mounted on the sliding rail, and the sliding chain hoist is suspended below the monorail trolley, with its free end connected to the crossbeam to be dismantled.

[0006] Furthermore, the length of the sliding track is greater than the longitudinal width of the steel cap beam.

[0007] Furthermore, both ends of the sliding track are sealed to prevent the monorail trolley from derailing.

[0008] Furthermore, the sliding track is made of steel, and the welded connection with the steel cap beam is reinforced to ensure the load-bearing strength of the sliding track.

[0009] Preferably, the sliding chain hoist is an HS-C type hand chain hoist.

[0010] The present invention also includes a construction method for a device for dismantling the crossbeam of a temporary support for a steel cap beam, comprising the following steps: Step 1: Install the sliding rail and monorail trolley. Weld and fix the sliding rail to the bottom of the steel cap beam at the position directly above the crossbeam to be removed, ensuring that the sliding rail is level and firm. Then, assemble the monorail trolley onto the sliding rail and check the smoothness of the monorail trolley's sliding. Step 2: Connect the sliding chain hoist to the crossbeam. Suspend the sliding chain hoist under the monorail trolley and firmly connect the free end of the sliding chain hoist to the crossbeam to be removed, ensuring that the load-bearing capacity of the connection point matches the weight of the crossbeam. Step 3: Tighten the sliding chain hoist. Slowly tighten the sliding chain hoist so that it is fully stressed and holds the crossbeam, transferring the weight of the crossbeam from the temporary support to the combined structure of the sliding chain hoist and the monorail trolley. Step 4: Beam cutting. Use cutting equipment to cut the beam connected to the temporary support to separate the beam from the temporary support. During the cutting process, keep the force on the sliding chain hoist unchanged. Step 5: Move the crossbeam, pull the sliding chain hoist, and drive the monorail trolley to slide along the sliding track to the outside of the steel cap beam until the cut crossbeam is moved to an unobstructed, hoistable area outside the steel cap beam; Step Six: Lifting and Dismantling of the Crossbeam. Use a crane to lift the crossbeam that has been moved to the outside of the steel cap beam, and remove the crossbeam from the construction area to complete the dismantling of the single crossbeam.

[0011] Furthermore, in step one, after the sliding track is welded and fixed, the weld needs to be inspected, and the weld quality needs to meet the relevant specifications for steel structure construction.

[0012] Furthermore, in step three, the tightening of the sliding chain hoist should be done slowly to avoid violent shaking of the crossbeam and to prevent collision with the surrounding existing structure.

[0013] Furthermore, in step five, during the sliding process of the monorail vehicle, a dedicated person is assigned to monitor the coordination between the sliding track and the monorail vehicle, and to promptly address any jamming or deviation issues.

[0014] In summary, the present invention has the following advantages and beneficial technical effects: 1. The device of this invention includes a sliding track, a monorail trolley, and a sliding chain hoist. It features a simple structure, convenient assembly and disassembly, and is suitable for construction scenarios in confined spaces surrounding temporary supports for steel cap beams. The sliding track is precisely positioned above the crossbeam to be dismantled on the temporary steel cap beam support, ensuring the crossbeam can be vertically lifted subsequently. The length of the sliding track is greater than the longitudinal width of the steel cap beam, allowing the cut crossbeam to be moved via the sliding track to a liftable area outside the steel cap beam. Simultaneously, end-sealing structures are installed at both ends of the sliding track to effectively prevent the monorail trolley from derailing during sliding, ensuring construction safety.

[0015] 2. In this invention, the function of the monorail trolley is to move the cut crossbeam from the narrow space under the steel cap beam to the outside of the steel cap beam, providing operating space for the crane to lift the beam.

[0016] 3. In this invention, the sliding chain hoist is used to lift and load the crossbeam, transferring its weight from the temporary support to the device. Simultaneously, pulling the chain hoist drives the monorail trolley to slide along the sliding track, thus moving the crossbeam. Different specifications of sliding chain hoists can be used depending on the actual weight of the crossbeam to be removed, meeting the construction needs of different projects.

[0017] 4. The construction method of the present invention achieves in-situ stress, cutting and off-site lifting of the crossbeam through the steps of "installation of sliding track and monorail trolley - connection of sliding chain hoist to crossbeam - tightening and stress of sliding chain hoist - cutting - displacement - external lifting". The crossbeam is always in a stable control state throughout the process, avoiding the possibility of collision between the crane, the hoisted object and the surrounding existing structures, thus improving construction safety, simplifying the operation process and significantly improving construction efficiency. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Fig. 1 This is a schematic diagram of the device in this invention; Fig. 2 This is a front view schematic diagram of the crossbeam of the present invention before lifting; Fig. 3 This is a side view of the crossbeam before it is lifted according to the present invention. Fig. 4 This is a front view schematic diagram of the beam lifting process of the present invention; Fig. 5 This is a side view schematic diagram of the beam lifting process of the present invention; Fig. 6 This is a schematic diagram of the structure after the crossbeam of the present invention has been removed.

[0019] The reference numerals in the attached figures are: 1. Sliding track; 2. Monorail trolley; 3. Sliding chain hoist; 4. Crane; 5. Steel cap beam; 6. Temporary support; 7. Crossbeam. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout; the described embodiments are some embodiments of this invention, but not all embodiments; the embodiments and directional terms described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting this invention; all other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. The embodiments of this invention will be described in detail below with reference to the accompanying drawings: The following is in conjunction with the appendix Figs. 1-6 The present invention will be further described in detail below: Example 1 like Figs. 1-3 As shown, this embodiment discloses a device for dismantling the crossbeams of temporary supports for steel cap beams. The device includes a sliding rail 1 welded to the bottom of each steel cap beam 5, a monorail trolley 2, and a sliding chain hoist 3. The sliding rail 1 is installed directly above the crossbeams 7 of the temporary support 6 of the steel cap beam 5, ensuring that the crossbeams 7 can be vertically lifted later. The length of the sliding rail 1 is greater than the longitudinal width of the steel cap beam 5, allowing the cut crossbeams 7 to be moved to a liftable area outside the steel cap beam 5 via the sliding rail 1. Both ends of the sliding rail 1 are sealed to prevent the monorail trolley 2 from derailing and ensure construction safety. The monorail trolley 2 is movably mounted on the sliding rail 1 and can reciprocate linearly along the sliding rail 1 to move the cut crossbeams 7 to the outside of the steel cap beam 5. The sliding chain hoist 3 is suspended below the monorail trolley 2, with its free end connected to the crossbeam 7 to be dismantled, used to lift and support the crossbeam 7 and cooperate with the monorail trolley 2 to complete the displacement of the crossbeam 7.

[0021] The sliding rail 1 is made of steel, and the welded connection with the steel cap beam 5 is reinforced to ensure the load-bearing strength of the sliding rail 1. The sliding chain hoist 3 is an HS-C type hand chain hoist, and different specifications and models of hand chain hoists can be replaced according to the weight of the crossbeam 7.

[0022] Example 2 The construction method of the device for dismantling the crossbeam of the temporary support of the steel cap beam according to the present invention is as follows: Step 1: Installation of Sliding Rail 1 and Monorail Trolley 2: Position the sliding rail 1 directly above the beam 7 to be removed, and horizontally weld it to the bottom of the steel cap beam 5. After welding, inspect the weld to ensure there are no issues such as incomplete welds or missing welds, meeting the relevant specifications for steel structure construction. Then, assemble the monorail trolley 2 onto the sliding rail 1. Manually push the monorail trolley 2 along the rail to check its smoothness, promptly addressing any jamming or misalignment to ensure the monorail trolley 2 can operate normally.

[0023] Step 2: Connecting the sliding chain hoist 3 to the crossbeam 7: Suspend the sliding chain hoist 3 below the monorail trolley 2. Select a suitable connection point according to the shape and structure of the crossbeam 7. Securely connect the free end of the sliding chain hoist 3 to the crossbeam 7 to be removed. The connection point needs to be reinforced to ensure that the load-bearing capacity of the connection point matches the weight of the crossbeam 7 and to prevent it from falling off during the lifting process.

[0024] Step 3: Tightening the sliding chain hoist 3: Slowly operate the sliding chain hoist 3 to gradually apply force and pull the crossbeam 7. During this process, slowly lift the crossbeam 7, gradually transferring its weight from the temporary support 6 to the combined structure of the sliding chain hoist 3 and the monorail trolley 2, until the crossbeam 7 completely disengages from the temporary support 6. Tightening the sliding chain hoist 3 requires uniform and slow operation to avoid violent shaking of the crossbeam 7 and prevent collisions with surrounding existing structures and the steel cap beam 5.

[0025] Step 4: Cutting the crossbeam 7: Use cutting equipment to cut the crossbeam 7, which is connected to the main body of the temporary support 6, to completely separate the crossbeam 7 from the temporary support 6. During the cutting process, the force state of the sliding chain hoist 3 must remain unchanged to ensure that the crossbeam 7 is always in a stable lifting state. At the same time, fire prevention and splash prevention measures should be taken in the cutting area to prevent sparks from igniting surrounding items or damaging the steel cap beam 5 and dismantling the device.

[0026] Step 5: Shifting the crossbeam 7: Pull the sliding chain hoist 3 to move the monorail trolley 2 in a straight line along the sliding track 1 towards the outside of the steel cap beam 5. During this process, a designated person should monitor the coordination between the sliding track 1 and the monorail trolley 2, observing whether the sliding track 1 is deformed or whether the monorail trolley 2 is stuck or deviated. If any abnormality occurs, stop the operation immediately and address the issue. Continue until the cut crossbeam 7 is moved to an unobstructed area outside the steel cap beam 5 where the crane 4 can lift it smoothly.

[0027] Step Six: Lifting and dismantling of crossbeam 7: (as follows) Figs. 4-6As shown, the lifting device of crane 4 is securely connected to the crossbeam 7, which is being moved to the outside of the steel cap beam 5. Then, the sliding chain hoist 3 is slowly released, gradually transferring the weight of the crossbeam 7 onto crane 4. Once crane 4 is confirmed to be fully loaded, the connection between the sliding chain hoist 3 and the crossbeam 7 is removed. Crane 4 is then used to lift the crossbeam 7 away from the construction area, completing the removal of a single crossbeam 7. The above steps are repeated for multiple crossbeams 7 to be removed, until all crossbeams 7 are removed.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for dismantling the crossbeam of a temporary support for a steel cap beam, characterized in that: It includes a sliding track fixedly installed at the bottom of each steel cap beam, a monorail trolley, and a sliding chain hoist. The installation position of the sliding track corresponds to the top of the crossbeam of the temporary support for the steel cap beam. The monorail trolley is movably mounted on the sliding track. The sliding chain hoist is suspended below the monorail trolley, and its free end is connected to the crossbeam to be removed.

2. The device for dismantling the crossbeam of a temporary support for a steel cap beam according to claim 1, characterized in that: The length of the sliding track is greater than the longitudinal width of the steel cap beam.

3. The device for dismantling the crossbeam of a temporary support for a steel cap beam according to claim 1, characterized in that: Both ends of the sliding track are sealed to prevent the monorail from derailing.

4. The device for dismantling the crossbeam of a temporary support for a steel cap beam according to claim 1, characterized in that: The sliding track is made of steel, and the welded connection with the steel cap beam is reinforced to ensure the load-bearing strength of the sliding track.

5. The device for dismantling the crossbeam of a temporary support for a steel cap beam according to claim 1, characterized in that: The sliding chain hoist is an HS-C type hand chain hoist.

6. A construction method for a device used to dismantle the crossbeam of a temporary support for a steel cap beam, characterized in that: The construction method of the device for dismantling the crossbeam of the temporary support for the steel cap beam as described in claim 1 includes the following steps: Step 1: Install the sliding rail and monorail trolley. Weld and fix the sliding rail to the bottom of the steel cap beam at the position directly above the crossbeam to be removed, ensuring that the sliding rail is level and firm. Then, assemble the monorail trolley onto the sliding rail and check the smoothness of the monorail trolley's sliding. Step 2: Connect the sliding chain hoist to the crossbeam. Suspend the sliding chain hoist under the monorail trolley and firmly connect the free end of the sliding chain hoist to the crossbeam to be removed, ensuring that the load-bearing capacity of the connection point matches the weight of the crossbeam. Step 3: Tighten the sliding chain hoist. Slowly tighten the sliding chain hoist so that it is fully stressed and holds the crossbeam, transferring the weight of the crossbeam from the temporary support to the combined structure of the sliding chain hoist and the monorail trolley. Step 4: Beam cutting. Use cutting equipment to cut the beam connected to the temporary support to separate the beam from the temporary support. During the cutting process, keep the force on the sliding chain hoist unchanged. Step 5: Move the crossbeam, pull the sliding chain hoist, and drive the monorail trolley to slide along the sliding track to the outside of the steel cap beam until the cut crossbeam is moved to an unobstructed, hoistable area outside the steel cap beam; Step Six: Lifting and Dismantling of the Crossbeam. Use a crane to lift the crossbeam that has been moved to the outside of the steel cap beam, and remove the crossbeam from the construction area to complete the dismantling of the single crossbeam.

7. A construction method for a device for dismantling the crossbeam of a temporary support for a steel cap beam according to claim 6, characterized in that: In step one, after the sliding track is welded and fixed, the weld needs to be inspected, and the weld quality must meet the relevant specifications for steel structure construction.

8. A construction method for a device for dismantling the crossbeam of a temporary support for a steel cap beam according to claim 6, characterized in that: In step three, the tightening of the sliding chain hoist should be done slowly to avoid violent shaking of the crossbeam and to prevent collision with the surrounding existing structure.

9. A construction method for a device for dismantling the crossbeam of a temporary support for a steel cap beam according to claim 6, characterized in that: In step five, during the sliding process of the monorail vehicle, a dedicated person is assigned to monitor the coordination between the sliding track and the monorail vehicle, and to promptly address any jamming or deviation issues.

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