Bent-top steel structure segmented hoisting support device for multi-working-face synchronous construction

Abstract

The invention discloses a bent-top steel structure segmented hoisting support device for multi-working-face synchronous construction. The bent-top steel structure segmented hoisting support device comprises a scaffold, a supporting support and a hoisting module. The scaffold supports are erected into a step shape, and a plurality of scaffold platforms are formed. The supporting bracket is mounted and fixed on the scaffold platform, is used as a support of the bent top steel structure and a temporary fixed assembly jig frame, and consists of a base steel plate and a supporting circular pipe; the hoisting module is divided into a plurality of hoisting units which are arranged on the outer side of the scaffold. A plurality of equal-height operation platforms are formed at a time through the step-shaped scaffold, dome partitioning, synchronous splicing and synchronous hoisting are achieved, installation and construction of the ball joint support are facilitated, the construction efficiency is improved, the installation accuracy is guaranteed, and the construction period is shortened by 30% or above; the supporting bracket adopts the modularized combination of the base steel plate and the supporting circular pipe, the base steel plate increases the contact area, the node slippage is small, the assembly precision is high, and the construction requirement of the segmental hoisting operation of the bent top steel structure is better met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dome construction, in particular to a segmented hoisting support device for curved roof steel structure with multi-operation surface synchronous construction. BACKGROUND

[0002] The special-shaped dome refers to the relatively irregular top structure of a building, which is often used as the upper shielding structure of a building lobby. In order to take into account the good lighting effect, the special-shaped dome construction usually includes two important components, i.e. a dome support and a dome glass. The dome support provides a basic structural support, and the dome glass provides the main lighting and waterproof functions. According to the design of the external structural elements, the special-shaped dome is assembled into a circular arc dome by a plurality of spherical connection support blocks. The construction process is to first construct and build the dome support, and then lift and transport the dome glass one by one to the corresponding position on the dome support for installation. How to design the segmented hoisting support device for curved roof steel structure is an important link in the construction of this type of special-shaped dome. A reasonable system structure setting is conducive to the installation and construction of the spherical connection support, improves the construction efficiency, and ensures the installation accuracy. SUMMARY

[0003] The present application provides a segmented hoisting support device for curved roof steel structure with multi-operation surface synchronous construction, which includes a scaffold support, a support support and a hoisting module. The scaffold support is arranged in a ladder shape to form a plurality of scaffold platforms. The support support is installed and fixed on the scaffold platform as a support and temporary fixing assembly jig for the curved roof steel structure. The support support is used for supporting the longitudinal skeleton of the curved roof steel structure and is composed of a base steel plate and a support round pipe. The hoisting module is divided into a plurality of hoisting units and arranged on the outside of the scaffold support for synchronous hoisting of the curved roof steel structure for multi-operation surface synchronous construction.

[0004] As a further description of the present application, the base steel plate is made of a plate steel profile to increase the support contact area with the scaffold support. The support round pipe is made of a round steel pipe.

[0005] Further, the base steel plate and the support round pipe are connected by welding. The top end of the support round pipe is provided with an adjusting jack structure.

[0006] Further, the support support and the scaffold support are connected and reinforced by a reinforcing structure.

[0007] Further, the adjusting jack structure includes a jack sleeve and a jack. The jack sleeve is slidably arranged at the top of the support round pipe by driving the jack.

[0008] Further, the adjusting jack structure further includes a stress indicating mechanism.

[0009] Further, the force indicating mechanism is a linkage assembly, which comprises a vertical rod arranged vertically and telescopically along the top support sleeve, and a horizontal rod arranged horizontally and telescopically along the top support sleeve.

[0010] Further, the scaffold includes a facade scaffold and a full-scaffold.

[0011] Further, the facade scaffold adopts a floor-standing double-row fastener type steel pipe scaffold, and the base is a concrete cushion.

[0012] Further, the full-scaffold adopts a disc buckle type steel pipe scaffold, vertical inclined rods are arranged at intervals, continuous horizontal scissors are arranged, and a safety net is laid.

[0013] Advantages of the present application: The present application forms multiple equal-height operation platforms at one time through the ladder-shaped scaffold, realizes the partitioning, synchronous assembling and synchronous hoisting of the dome, is beneficial to the installation and construction of the spherical joint support, improves the construction efficiency, ensures the installation accuracy, and shortens the construction period by more than 30%; the support support adopts a modular combination of a base steel plate and a support round pipe, the base steel plate increases the contact area, can disperse the radial horizontal thrust of the dome to the node of the scaffold vertical rod, has small node slip amount and high assembling precision, and better meets the construction requirements of the segmented hoisting operation of the curved top steel structure. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A schematic diagram of the scaffold and the support support of the embodiment of the present application is shown Figure 1 ; Figure 2 A schematic diagram of the scaffold and the support support of the embodiment of the present application is shown Figure 1 ; Figure 3 A structural diagram of the support support of the embodiment of the present application is shown; Figure 4 A structural diagram of the linkage assembly of the embodiment of the present application is shown; Figure 5 A schematic diagram of the installation sequence of the dome horizontal skeleton unit of the embodiment of the present application is shown; Figure 6 A schematic diagram of the position of the hoisting module crane and the corresponding operation area of the embodiment of the present application is shown.

[0015] Legend: scaffold 1, support support 2, base steel plate 3, support round pipe 4, long-arm crane 5, top support sleeve 6, jack 7, vertical rod 8, horizontal rod 9, curved top steel structure 10, longitudinal skeleton 101, horizontal skeleton unit 102. DETAILED DESCRIPTION

[0016] Embodiment:

[0017] The embodiments of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0018] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0019] As shown in the accompanying Figures 1-6 The segmented hoisting support device for the bent roof steel structure of the multi-operation surface synchronous construction of the present embodiment includes a scaffold 1, a support support 2, and a hoisting module. The scaffold 1 is arranged in a ladder shape to form a plurality of scaffold platforms. The support support 2 is installed and fixed on the scaffold platform to serve as a support and temporary fixing assembly jig for the bent roof steel structure 10. The support support 2 is used for supporting the longitudinal skeleton 101 of the bent roof steel structure 10 and is composed of a base plate 3 and a support pipe 4. The hoisting module is divided into a plurality of hoisting units and is arranged outside the scaffold 1 to be used for synchronous hoisting of the bent roof steel structure 10 for multi-operation surface synchronous construction. In actual application, based on the structural design of the bent roof steel structure 10, the longitudinal skeleton 101 of the bent roof steel structure 10 is first installed on the support support 2, and then the transverse skeleton unit 102 of the bent roof steel structure 10 is subjected to multi-operation surface synchronous construction through the hoisting module to improve the construction operation efficiency. The hoisting module can be hoisted by a long-arm crane 5. In actual application, the construction position of the long-arm crane 5 is adjusted according to the actual situation of the hoisting unit. As shown in the accompanying drawings, in the engineering application of the present embodiment, the construction site of the bent roof steel structure 10 is divided into four construction areas. The long-arm crane 5 operates within the corresponding construction area with a radius covering part of the bent roof steel structure 10 to complete the corresponding hoisting construction.

[0020] The segmented hoisting support device for the bent roof steel structure of the present embodiment is actually used for the assembly and welding construction of the special-shaped dome ball joint support. The ladder-shaped scaffold 1 forms a plurality of equal-height operation platforms at one time to realize dome partitioning, synchronous assembly, and synchronous hoisting, which is conducive to the installation and construction of the ball joint support, improves the construction efficiency, ensures the installation accuracy, and shortens the construction period by more than 30%. The support support 2 adopts a modular combination of "base plate 3 + support pipe 4". The base plate 3 increases the contact area with the scaffold 1 to disperse the radial horizontal thrust of the dome to the node of the vertical rod of the scaffold 1. The node has small sliding amount and high assembly precision, which better meets the construction requirements of the segmented hoisting operation of the bent roof steel structure 10. The assembly and welding construction of the special-shaped dome ball joint support in actual engineering will be described as follows. 1) First, calculate the coordinates and height difference of each welded ball according to the coordinates of the ball nodes in the drawings. Measure the central cross lines of the irregular dome ball joint support and the scaffolding platform 1 respectively. Place steel pipe positioning rings (i.e. steel pipe jigs) on the central cross lines so that the two coincide.

[0021] 2) After marking the control point positions, first position and fix the support bracket 2 of the center ball, and then install the center ball into place. Then, according to the measurements, install the corresponding 5 bottom support balls into place.

[0022] 3) Installation of longitudinal frame 101: In this embodiment, the curved roof steel structure 10 includes five longitudinal frames 101. One of these frames is selected, and a jig is set up on the ground according to its corresponding position. The nine welded spheres (excluding the center sphere and support spheres) are placed in their positions, and then the members between the spheres are welded to the ground according to their positions. See Appendix. Figure 5 As shown, the welded spheres and rods of these five longitudinal frames 101 are identical in size and position, and can therefore be assembled on the ground in one go using the same jig. Each longitudinal frame 101 consists of nine welded spheres and ten rods, with a total weight of 420 kg. After being assembled on the ground, it is then lifted into place using a crane. During lifting, care must be taken to adjust the position and length of the lifting straps so that the components can be aligned with the center sphere and support sphere respectively. After being lifted into place, the rods at both ends and the corresponding spheres must be temporarily fixed, and temporary supports must be added under the middle sphere. After one longitudinal frame 101 is installed, the remaining four longitudinal frames 101 are installed in the same way. After all five longitudinal frames 101 are installed, the coordinates of each control point are checked to ensure their accuracy. When each point is within the control range, the temporary fixing positions of the cell and the center sphere and support sphere are welded to prepare for the next installation step.

[0023] 4) Installation of the transverse frame unit 102: Within the five construction sections of the curved steel structure 10, one section will be selected for the construction of the transverse frame unit 102. Similar to the construction of the longitudinal frame 101, the transverse frame unit 102 will also be assembled on the ground first, and then hoisted using a crane. Within each construction section, excluding the support balls and the welded balls already installed at the top, there are a total of 8 layers of transverse frame units 102. The number of welded balls decreases from 8 to 1 layer by layer, and the number of rods connected to the welded balls also decreases from 9 to 2 layers by layer. The heaviest transverse frame unit 102 weighs 400 kg. Three slings are used for hoisting the transverse frame unit 102. A 2T hand-operated hoist can be attached to the middle sling to adjust the levelness of the transverse frame unit 102. After each layer of transverse frame unit 102 is hoisted into place, the coordinate data are immediately measured. When the error is within the control range, the diagonal web members between each layer of transverse frame unit 102 and the next layer are also assembled into place.

[0024] 5) Installation of other construction sections: After the installation of the first construction section's space frame is completed, install the other construction sections using the same method. The installation sequence can be 1, 3, 5, 2, 4 to minimize deformation errors. After all construction sections are installed, measure and verify the entire space frame again, and finally perform overall welding reinforcement.

[0025] 6) Unloading: After the balls and rods in the 5 areas have been installed and welded, remove the temporary supports.

[0026] As a further explanation of the present invention, the base steel plate 3 is a 300*300*8mm plate steel, which increases the contact area between the support bracket 2 and the scaffold support 1, and can disperse the radial horizontal thrust of the dome to the scaffold upright nodes, reducing settlement; the support round tube is a round steel pipe with specifications of Φ89*4 and Φ165*4; the length and specifications are adjusted according to the ball specifications, and an adjustable top support structure can be set at the top of the support round tube, which can steplessly fine adjust the elevation of the dome node at high altitude with an adjustment accuracy of ±1mm, solving the drawbacks of the traditional pad method of "repeated replacement and large cumulative error".

[0027] In this embodiment, the base steel plate 3 and the supporting round tube 4 are connected by welding.

[0028] In this embodiment, a reinforcement structure is provided at the connection between the support bracket 2 and the scaffolding bracket 1 for reinforcement. As described above, the overall assembly of the dome spherical scaffolding is carried out on a full-span scaffolding platform. Due to the characteristics of the spherical space frame, the scaffolding needs to be erected in a stepped shape to meet installation requirements. To prevent deformation and subsidence at the support locations, reinforcement is carried out at the support locations before construction. After the supports are completed, their elevation is recorded. After the space frame is assembled, its subsidence is observed to check the stress on each support and adjust any unstressed supports to ensure that each support is under stress.

[0029] In this embodiment, the adjustable top support structure includes a top support sliding sleeve 6 and a jack 7. The top support sliding sleeve 6 is slidably mounted on the top of the supporting circular tube 4 by being driven by the jack 7. The extension height of the top support sliding sleeve 6 is adjusted by the jack 7, thereby adjusting the support height of the ball joint bracket. During unloading, the jack 7 is controlled by the control system to synchronously descend in 20mm increments until the support point of the grid structure is 10mm away from the top position, thus achieving the unloading operation. In practical applications, a scale can be used to ensure that the descent value of each step during unloading is within a controllable range, and preparation work for unloading scale should be done. The specific method can be referred to as follows: A. Immediately place a ruler near the temporary support point, align it with the scale, and fix it in place. It can only be removed after the unloading is complete; otherwise, it is not allowed to be removed midway. B. Directly release the length value of each unloading step along the falling direction on jack 7 as the control standard for each unloading step; C. Erect steel pipes on the sides adjacent to the jack 7, and mark the length value of each unloading step on the steel pipes as the control standard for each unloading step.

[0030] As described above, to facilitate the inspection of the stress condition of the support bracket 2, as shown in the attached drawings, a stress indicator mechanism is provided on the top support sleeve 6 in this embodiment to provide a visual indication of the stress condition of the support bracket 2. Specifically, the stress indicator mechanism in this embodiment is a linkage assembly, including a vertical rod 8 that extends and retracts along the vertical direction of the top support sleeve 6 and a horizontal rod 9 that extends and retracts along the lateral direction of the top support sleeve 6. When the top support sleeve 6 is under stress, the vertical rod 8 moves downward under pressure, causing the horizontal rod 9 to extend laterally, indicating that the top support sleeve 6 and the supported object are under stress in the current state. Conversely, the vertical rod 8 and the horizontal rod 9 are reset under the action of a reset component (e.g., a spring), and the horizontal rod 9 retracts, indicating that the support bracket 2 and the supported object are not under stress and support adjustment is required to ensure that the support is under stress.

[0031] In this embodiment, the scaffolding 1 includes exterior scaffolding and full-span scaffolding.

[0032] In this embodiment, the exterior scaffolding adopts a ground-supported double-row coupler-type steel pipe scaffolding, with a concrete pad foundation. The exterior scaffolding uses a ground-supported double-row coupler-type steel pipe scaffolding, with a 120mm thick C30 concrete pad foundation. The longitudinal spacing of the uprights is ≤1.2m, the transverse spacing is 0.9m, the horizontal bar step distance is 1.8m, the inner pole is 0.2m away from the building structural surface, and the erection height is from the original ground floor to the roof floor +1.2m. Wall ties are set at two spans per step, the outer side of the scaffolding is fully covered with dense safety netting, and toe boards are set at each step.

[0033] In this embodiment, during the curtain wall installation phase, the original main structure scaffolding was dismantled and modified, and the distance from the wall was adjusted to 0.35m to facilitate the installation of the curtain wall keel. The longitudinal and transverse spacing and step distance remained unchanged, and safety protection was provided by laying steel mesh and installing safety nets at the gaps from the wall.

[0034] In this embodiment, the full-span scaffolding is erected using disc-lock steel pipe scaffolding. Vertical diagonal bracing is installed at intervals, and continuous horizontal scissor bracing and safety netting are provided. Specifically, the maximum erection height is 20m, with a longitudinal and transverse spacing of 1.2m × 1.2m, a step distance of 1m, and vertical diagonal bracing every two spans. Continuous horizontal scissor bracing is installed at 4m and 12m positions, and safety netting is laid to improve the safety of construction operations.

[0035] The above description only illustrates preferred embodiments of the present invention and should not be construed as limiting the scope of the claims. The present invention is not limited to the above embodiments, and variations in its specific structure are permitted. In short, all variations made within the scope of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A segmented hoisting support device for curved roof steel structures under simultaneous construction on multiple work surfaces, characterized in that: The system includes scaffolding, support brackets, and hoisting modules. The scaffolding is erected in a stepped shape, forming several scaffolding platforms. The support brackets are installed and fixed on the scaffolding platforms, serving as supports for the curved steel structure and temporary fixed assembly frames. The support brackets are used to support the longitudinal skeleton of the curved steel structure and consist of a base steel plate and supporting round pipes. The hoisting modules are divided into several hoisting units located on the outside of the scaffolding for synchronous hoisting of the curved steel structure for simultaneous construction on multiple work surfaces.

2. The segmented hoisting support device for curved roof steel structure under simultaneous construction of multiple work surfaces as described in claim 1, characterized in that... The base steel plate is made of plate steel profile to increase the support contact area with the scaffolding, and the support round tube is made of round steel pipe.

3. The segmented hoisting support device for curved roof steel structure under simultaneous construction of multiple work surfaces as described in claim 1, characterized in that... The base steel plate and the supporting round tube are connected by welding, and the top of the supporting round tube is provided with an adjustable top support structure.

4. The segmented hoisting support device for curved roof steel structure under simultaneous construction of multiple working faces as described in claim 3, characterized in that... The connection between the support bracket and the scaffolding is reinforced with a reinforcing structure.

5. The segmented hoisting support device for curved roof steel structure under simultaneous construction of multiple working faces as described in claim 3, characterized in that... The adjustable top support structure includes a top support sliding sleeve and a jack. The top support sliding sleeve is slidably mounted on the top of the supporting circular tube by the jack.

6. The segmented hoisting support device for curved roof steel structure under simultaneous construction of multiple working faces as described in claim 5, characterized in that... The adjustable top support structure also includes a force indication mechanism.

7. The segmented hoisting support device for curved roof steel structure under simultaneous construction of multiple working faces as described in claim 6, characterized in that... The force indication mechanism is a linkage assembly, including a vertical rod that extends and retracts along the vertical direction of the top support sleeve and a horizontal rod that extends and retracts along the lateral direction of the top support sleeve.

8. The segmented hoisting support device for curved roof steel structure under simultaneous construction of multiple working faces as described in claim 1, characterized in that... The scaffolding includes exterior scaffolding and full-span scaffolding.

9. The segmented hoisting support device for curved steel structures under simultaneous construction on multiple work surfaces as described in claim 8, characterized in that... The exterior scaffolding is a ground-supported double-row coupler-type steel pipe scaffolding, with a concrete foundation.

10. The segmented hoisting support device for curved roof steel structure under simultaneous construction of multiple working faces as described in claim 8, characterized in that... The full-span scaffolding is erected using disc-lock steel pipe scaffolding, with vertical diagonal bracing at intervals, continuous horizontal scissor bracing, and safety netting.

Images