A fast assembly door hole type support structure

Abstract

The utility model relates to support structure technical field and disclose a kind of quick assembly door-hole type support structure, including multiple rows of columns, the top of each row of columns is detachably installed with crossbeam, and the column is connected with crosspiece between;Ramp rafter is detachably connected between the column and crossbeam, wherein, the end of the ramp rafter is welded with third connecting plate, the lower end surface both sides of the crossbeam are welded with multiple first connecting plates, multiple second connecting plates are equidistantly welded on the column, and supporting plate is welded between adjacent second connecting plates;The utility model satisfies the demand of shield assembly and origin, successfully completes shield mechanism component lowering and assembly debugging operation without needing structure to reach design strength and remove support, can effectively save construction period compared with conventional process, improves installation efficiency by optimization measures, optimizes on-site welding operation, cancels high-altitude operation link, greatly eliminates security risk.

Description

Technical Field

[0001] This utility model relates to the field of support structure technology, and in particular to a quick-assembly doorway support structure. Background Technology

[0002] During the construction of subway stations, the main structure typically employs the full-span scaffolding method for cast-in-place concrete work. According to construction specifications, the full-span scaffolding on the lower levels (such as -1 and -2 levels) must not be dismantled before the station's roof concrete reaches its design strength to ensure structural safety. However, when a subway station also serves as the starting point for a tunnel boring machine (TBM) section, the assembly and launch of the TBM require a large amount of continuous, unobstructed working space on the station's bottom level (such as -2 level). The TBM is enormous, reaching lengths of over 80 meters after assembly, necessitating the station to provide corresponding structural space. This creates a sharp contradiction: TBM assembly requires early access to the station's bottom level, but the full-span scaffolding on the bottom level cannot be dismantled due to the upper structure's insufficient strength. This results in a severe conflict in time and space between station structural construction and TBM launch and assembly, directly impacting the overall project schedule.

[0003] Currently, the following two solutions can be verified and applied to address this issue: 1. The first type is the beam-column type doorway structure – large-diameter steel pipe columns with I-beam crossbeams. That is, two longitudinal supporting beams are arranged on the large-diameter steel pipe columns, and crossbeams are arranged at equal intervals on the supporting beams. Then, a steel plate is covered on top to serve as the platform for erecting the full-span scaffold. The steel pipe columns are welded and fixed to the pre-embedded steel plates in the base plate. This solution has a large load-bearing capacity, but it consumes a lot of steel, requires high positioning accuracy for embedded parts, requires separate installation of each component with high installation accuracy, and has large size and weight of each component, which also poses a high risk of installation safety.

[0004] 2. The second type is the cup-lock type doorway support frame structure. That is, the columns use dense cup-lock uprights, the spacing between the uprights is no more than 300mm and there are no less than 4 rows. Horizontal distribution beams and longitudinal distribution beams are set on the top of the uprights one after another. A transfer beam for the passage is then erected on the longitudinal distribution beam. A steel plate is laid on the transfer beam as a platform for erecting the full-span scaffold.

[0005] This method offers flexibility, but the erection system is relatively complex, the span should not exceed 4m, steel consumption is high, and there are significant safety risks during erection. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a quick-assembly door-hole type support structure that can effectively save materials and is detachable and reusable.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a quick-assembly doorway type support structure, comprising: multiple rows of columns, each row of columns having a detachable crossbeam installed at its top, and the columns being connected by cross braces. The diagonal brace is detachably connected between the column and the beam. The end of the diagonal brace is welded with a third connecting plate. Multiple first connecting plates are welded to both sides of the lower end face of the beam. Multiple second connecting plates are welded at equal intervals on the column. A support plate is welded between adjacent second connecting plates.

[0008] Preferably, a first positioning plate and a second positioning plate are welded to two adjacent surfaces at one end of the crossbeam, respectively.

[0009] Preferably, a fixing steel plate is welded to the bottom end of the column, and expansion bolts are inserted through the fixing steel plate.

[0010] Preferably, the upper end face of the crossbeam is welded with multiple uprights at intervals.

[0011] Preferably, a connector plate is fixed to the top of the column, and mounting holes are provided on the lower end face of the crossbeam and the connector plate.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows: (1) It meets the requirements of shield assembly and launch. Without the need for the structure to reach the design strength and the support to be removed, the shield components can be successfully lowered and assembled and debugged. Compared with conventional procedures, it can effectively save the construction period. Through optimization measures, the installation efficiency has been improved, the on-site welding operation has been optimized, the high-altitude operation has been eliminated, and the safety hazards have been greatly eliminated.

[0013] (2) The quick-assembly door opening bracket has optimized the design of the supporting longitudinal beam, the upper steel plate, and the embedded steel plate components. While ensuring quality and safety, it reduces the consumption of steel for the bracket and can effectively save material costs.

[0014] (3) Easy to dismantle and recyclable: After the construction is completed, the bolts can be removed and the parts can be dismantled and recycled without cutting. This ensures that all components are 100% recyclable and can be used directly for the same type of tunnel boring machine and station.

[0015] (4) When installing the diagonal brace, the lower end of the diagonal brace can be supported by the support plate, which can reduce the required support force. The support plate can also play a certain positioning role, which facilitates the quick connection of bolts. When welding the crossbeam on the column, the two adjacent sides of the end of the crossbeam can be directly attached to the first positioning plate and the second positioning plate respectively, which can ensure the alignment of the mounting holes and ensure the accuracy of subsequent bolt installation. No need for multiple adjustments, which greatly improves the installation efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram showing the connection between the column and the beam of this utility model; Figure 4 for Figure 1 Enlarged view of point A in the image; Figure 5 This is a schematic diagram of the installation of the column and fixing steel plate of this utility model; In the diagram: 1. Column; 2. Horizontal beam; 3. Diagonal brace; 4. Upright pole; 5. Horizontal brace; 6. Fixing steel plate; 7. First connecting plate; 8. Second connecting plate; 9. Support plate; 10. First positioning plate; 11. Second positioning plate; 12. Joint plate; 13. Third connecting plate; 14. Expansion bolt. Detailed Implementation

[0018] 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.

[0019] like Figures 1-5As shown, a quick-assembly doorway-type support structure is provided. This support structure consists of columns 1, beams 2, and diagonal braces 3. A fixing steel plate 6 is welded to the bottom of each column 1, and expansion bolts 14 pass through the fixing steel plate 6. Multiple rows of columns 1 are provided. The diagonal braces 3 are positioned and fixed between steel supports by channel steel cross braces. A beam 2 is detachably installed at the top of each row of columns 1. Multiple uprights 4 are welded to the upper surface of the beam 2 at intervals. The uprights 4 are welded and fixed to the beam 2 according to the required spacing. During erection, U-shaped top supports are directly inserted into the beams. The steel pipe cuts should be straight and fully welded to the beams 2 to ensure the spacing and verticality of the uprights 4. Horizontal bars (coupler type) are arranged longitudinally and transversely on the uprights 4 to connect the support into a whole. The uprights 1 are connected to the cross braces 5 by reinforcing plates. The diagonal braces 3 are detachably connected to the columns 1 and the beams 2. Between beams 2, the end of the diagonal brace 3 is welded with a third connecting plate 13, and multiple first connecting plates 7 are welded to both sides of the lower end face of beam 2. Multiple second connecting plates 8 are welded at equal intervals on column 1. Column 1 and beam 2 are made of 25B type I-beams, and diagonal brace 3 is made of 10# channel steel. The first connecting plates 7, second connecting plates 8 and third connecting plates 13 are all made of 10mm steel plates. The first connecting plates 7, second connecting plates 8 and third connecting plates 13 are all provided with φ22 bolt holes. The components are connected and assembled with M20 bolts. A joint plate 12 is fixed at the top of column 1. Mounting holes are opened on the lower end face of beam 2 and joint plate 12. Stiffening ribs are welded to both wings of the reinforcing plates of column 1 and beam 2. The stiffening ribs can be ⊿50×50×10mm.

[0020] The multiple first connecting plates 7 and second connecting plates 8 can be installed by adjusting their positions according to the installation inclination of the diagonal brace 3.

[0021] In addition, a support plate 9 is welded between adjacent second connecting plates 8. When installing the diagonal brace 3, the lower end of the diagonal brace 3 can be supported by the support plate 9, which can reduce the required support force. The support of the support plate 9 can also play a certain positioning role, which facilitates the quick connection of bolts.

[0022] The first positioning plate 10 and the second positioning plate 11 are welded to the two adjacent sides of one end of the crossbeam 2, respectively. When welding the crossbeam 2 to the column 1, the two adjacent sides of the end of the crossbeam 2 can be directly attached to the first positioning plate 10 and the second positioning plate 11, respectively, which can ensure the alignment of the mounting holes and ensure the accuracy of subsequent bolt installation without the need for multiple adjustments, thus greatly improving the installation efficiency.

[0023] Based on the assembly requirements of the tunnel boring machine, the steel support needs to provide a space with a clear width of 5m and a clear height of 5.15m. The steel support has a service length of 87m, and the upper part of the support can bear the load of a 400mm thick reinforced concrete floor slab.

[0024] Based on the above requirements, the steel frame is designed with a net width of 5m, a net height of 5.15m, and a spacing of 0.9m between each row of steel frames.

[0025] The specific support structure is erected as follows: (1) On the ground, the column 1, the beam 2, and the diagonal brace 3 are assembled into a single support frame, and then the support frame is lowered onto the structural base plate by a truck crane.

[0026] (2) With the assistance of the truck crane, the first bracket is positioned, aligned, and its verticality is corrected and temporarily fixed. Then, holes are drilled in the bolt holes of the fixing steel plate 6 and expansion bolts 14 are inserted for fixing.

[0027] (3) Lower the second bracket, and after initial positioning, install the cross brace 5. Then check the position of the bracket and wedge in the fixing bolts. Since the verticality of the first bracket has been checked and the cross brace 5 is a fixed spacing, the verticality of the second bracket does not need to be checked again.

[0028] (4) Install the third bracket. After the three brackets are fixed, the temporary fixing measures can be removed. After every five brackets are installed, the overall position is checked.

[0029] (5) After a section of steel frame is installed, longitudinal and transverse horizontal bars are installed on the uprights 4 at the top of the crossbeam 2. The horizontal bars are connected to the uprights 4 using ordinary steel pipes. Then, the top support, main ribs, secondary ribs and templates are installed.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick-assembly door-hole type support structure, characterized in that, include: A multi-row column (1), each row of column (1) has a detachable beam (2) installed at the top, and the columns (1) are connected by a cross brace (5). The diagonal brace (3) is detachably connected between the column (1) and the beam (2). The end of the diagonal brace (3) is welded with a third connecting plate (13). Multiple first connecting plates (7) are welded on both sides of the lower end face of the beam (2). Multiple second connecting plates (8) are welded at equal intervals on the column (1). A support plate (9) is welded between adjacent second connecting plates (8).

2. The quick-assembly door-hole type support structure according to claim 1, characterized in that: The first positioning plate (10) and the second positioning plate (11) are welded to two adjacent surfaces at one end of the crossbeam (2).

3. The quick-assembly door-hole type support structure according to claim 1, characterized in that: The bottom end of the column (1) is welded with a fixing steel plate (6), and expansion bolts (14) are threaded through the fixing steel plate (6).

4. The quick-assembly door-hole type support structure according to claim 1, characterized in that: The upper end face of the crossbeam (2) is welded with multiple uprights (4) at intervals.

5. The quick-assembly door-hole type support structure according to claim 1, characterized in that: The top of the column (1) is fixed with a connector plate (12), and the lower end face of the beam (2) and the connector plate (12) are provided with mounting holes.

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