Shield tunnel lane plate bracket rapid operation platform

Abstract

The utility model discloses a bracket quick operation platform for a shield tunnel lane plate, which relates to the technical field of shield tunnel construction, comprises a plurality of splicing units connected through fasteners, and is characterized in that each splicing unit comprises a platform plate, triangular brackets are mounted below two ends of the platform plate, and the triangular brackets are connected with the splicing units through fasteners. The triangular bracket is mounted on the inner wall of the tunnel, so that the platform plate is conveniently supported to provide a position of a bracket construction operation space for the lane plate of the shield tunnel; the construction platform has the beneficial effects that the modular segmental design is adopted, rapid assembly and disassembly of the platform and the guardrails are achieved through the fasteners and the insertion structures, and the construction period is greatly shortened; the triangular supports of the splicing units are fixedly installed through bayonet positions in combination with expansion bolts, the triangular supports can be disassembled by loosening the expansion bolts in the later period, material waste is reduced, the construction cost is reduced through the reusable structure, and the green construction concept is met.

Description

Technical Field

[0001] This utility model relates to the field of shield tunnel construction technology, and in particular to a rapid operation platform for shield tunnel lane slab brackets. Background Technology

[0002] In shield tunnel construction, the installation of the roadway slab corbels relies on temporary working platforms, but traditional platforms have many technical bottlenecks, seriously affecting construction efficiency and safety. Specifically:

[0003] (1) Low installation and dismantling efficiency: Traditional platforms mostly use welding or bolt fixing structures. During installation, the supports and guardrails need to be welded or tightened one by one. During dismantling, the bolts need to be cut or removed one by one. The construction time of a single platform exceeds 8 hours, and the reuse rate is low, making it difficult to meet the needs of rapid turnover of multiple working faces in the tunnel.

[0004] (2) Redundant and complex guardrail system: Existing guardrails usually adopt an integral welded frame or bolt splicing. The connection between the uprights and horizontal bars requires the cooperation of multiple people. For example, it is fixed by flange bolts, which makes the installation of a single guardrail section take more than 15 minutes. In addition, the welded structure is difficult to disassemble, resulting in material waste, and frequent welding may damage the surface of the tunnel segments.

[0005] (3) Insufficient platform stability and safety: Traditional platforms often use a single layer of wooden planks laid directly on a simple support frame, lacking a uniform stress distribution design. In many cases, the planks have collapsed due to local overload, causing construction interruptions. At the same time, the protective facilities are rudimentary, with only simple railings and no kickboards or safety nets. Small tools can easily fall through the gaps, threatening the safety of workers below.

[0006] (4) Inappropriate material and structural design: Traditional supports mostly use rigid welded frames, which cannot flexibly adjust the length or height, resulting in poor fit between the platform and the curved surface of the tunnel, and easy swaying. In addition, the gaps between the platform wooden planks are too large (such as more than 10mm), which not only increases the risk of tripping, but may also cause concrete debris to fall.

[0007] The aforementioned problems result in long construction cycles, significant safety hazards, and high overall costs associated with traditional platforms. Therefore, there is an urgent need for a work platform that combines rapid installation and dismantling, high stability, modular design, and comprehensive safety protection to overcome existing technological bottlenecks. Utility Model Content

[0008] The purpose of this utility model is to provide a rapid operation platform for the cantilever bracket of the shield tunnel lane slab in order to solve the above-mentioned problems.

[0009] This utility model achieves the above objectives through the following technical solutions:

[0010] A rapid working platform for the corbel of a tunnel roadway includes several splicing units connected by fasteners. Each splicing unit includes a platform plate. Triangular supports are installed at the lower ends of both ends of the platform plate. The triangular supports are installed on the inner wall of the tunnel to facilitate the support of the platform plate and provide the working space for the construction of the corbel of the tunnel roadway.

[0011] Preferably, the triangular bracket is fixedly installed on the inner wall of the tunnel using expansion bolts.

[0012] Preferably, the triangular bracket includes a fixed rod, a support rod, and a support plate. The fixed rod is fixed to the inner wall of the tunnel. The lower end of the support rod is fixedly connected to the fixed rod, and the upper ends of the support rod and the fixed rod are respectively connected to the two ends of the support plate. The support plate is fixedly connected to the platform plate.

[0013] Preferably, ear plates are fixedly installed on both sides of the upper end of the fixing rod, and slots are opened at the middle position of the lower edge of the ear plates and the middle position of the lower end of the fixing rod. The expansion bolts fix the fixing rod to the inner wall of the tunnel through the slots.

[0014] Preferably, the fixing rod, the support rod, and the support plate are all channel steel, the fixing rod is an arc shape that matches the curvature of the tunnel inner wall, and the angle between the lower end tangent of the fixing rod and the support rod is 60°-80°.

[0015] Preferably, the system also includes a guardrail, wherein a pole is fixedly installed on the platform plate at the end of the support plate away from the inner wall of the tunnel, and a sleeve is installed at the lower end of the guardrail corresponding to the position of the pole, and the sleeve is fitted onto the pole.

[0016] Preferably, a kickboard is installed on the lower part of the guardrail near the platform board.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. Quick assembly and disassembly, improving efficiency: The modular segmented design (2m per segment) enables the platform and guardrail to be quickly assembled and disassembled through fasteners and plug-in structures, significantly shortening the construction cycle;

[0019] 2. Highly adaptable support design: The tripod support is customized based on the curvature of the tunnel segments, which can flexibly adapt to segments with different curvatures, ensuring the stability and versatility of the platform;

[0020] 3. High-efficiency guardrail system: The uprights are fixed by inserting round steel bars, and the horizontal bars are connected by segmented fasteners, which simplifies the structure and enables quick assembly and disassembly of the guardrail, forming an overall rigid protection system;

[0021] 4. Stable working platform: The horizontally evenly distributed square timber and the full-covered wooden planks form a high-strength load-bearing surface, which, combined with the support of triangular brackets, effectively distributes the load and ensures construction safety;

[0022] 5. Comprehensive safety protection: The dual design of kickboard and safety net prevents tools or materials from falling and reduces safety hazards; the scientific layout of the spacing between uprights and the density of horizontal bars further enhances the protective effect;

[0023] 6. Cost and resource optimization: The triangular brackets of the splicing units are fixed and installed by means of expansion bolts at the bayonet positions. They can be disassembled and reused later by loosening the expansion bolts, reducing material waste. The reusable structure reduces construction costs and conforms to the concept of green construction. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a schematic diagram of the installation status of the shield tunnel lane slab bracket rapid operation platform described in this utility model.

[0026] Figure 2 This is a three-dimensional structural diagram of a splicing unit of a rapid operation platform for tunnel roadway support brackets according to the present invention.

[0027] Figure 3 This is a three-dimensional structural diagram of the triangular support of the rapid operation platform for the cantilever bracket of the shield tunnel lane slab described in this utility model.

[0028] The annotations in the attached figures are explained as follows:

[0029] 1. Triangular bracket; 11. Fixing rod; 12. Support rod; 13. Supporting rod; 14. Expansion bolt; 15. Insert rod; 2. Platform board; 3. Guardrail; 31. Sleeve; 32. Upright; 33. Horizontal bar; 4. Kickboard. Detailed Implementation

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.

[0032] The present invention will be further described below with reference to the accompanying drawings:

[0033] like Figures 1-3 As shown, a rapid working platform for a shield tunnel lane slab corbel includes several splicing units connected by fasteners. The number of splicing units depends on the actual length of the tunnel construction section. Each splicing unit is 2 meters long and includes a platform plate 2. Triangular supports 1 are installed at both ends of the platform plate 2. The triangular supports 1 are installed on the inner wall of the tunnel at a position 150 mm below the lowest position of the corbel. The platform plate 2 includes transverse square timbers and longitudinal wooden boards, which are nailed together. There are 4 square timbers, each with a size of 50×100 mm (2.3 m long). The square timbers are spaced apart on two triangular supports 1. A 15 mm thick wooden board is fully laid on the square timbers, with a laying length of 2 meters. The positions of the square timbers of adjacent splicing units are staggered. After the splicing units are spliced ​​and installed, the square timbers of the two splicing units below the joint position are staggered to support the position, ensuring the connection safety of the joint position. The gap between the wooden boards is ≤3 mm, forming a high-strength working surface with a width of 1.2 meters.

[0034] The triangular bracket 1 includes a fixed rod 11, a support rod 12, and a support plate. The fixed rod 11 is fixed to the inner wall of the tunnel. The lower end of the support rod 12 is fixedly connected to the fixed rod 11, and the upper ends of the support rod 12 and the fixed rod 11 are respectively connected to the two ends of the support plate. The support plate is fixedly connected to the platform plate 2.

[0035] Ear plates are fixedly installed on both sides of the upper end of the fixing rod 11. A slot is opened at the middle of the lower edge of the ear plate and the middle of the lower end of the fixing rod 11. The expansion bolt 14 fixes the fixing rod 11 to the inner wall of the tunnel through the slot. The expansion bolt is relatively strong and stable in fixing components, but it will be difficult to disassemble later. Due to the structural characteristics of the expansion bolt, when the fixing nut is loosened, the bolt column will rotate with the nut inside the expansion tube when it is not under the outward tension. Therefore, it is easy to loosen the nut of the expansion bolt, but it is time-consuming and laborious to completely disassemble it. However, this application adopts a downward-opening slot, so that the fixing rod can not only be fixed by the force of the nut, but also be hung on the bolt column of the expansion bolt by the ear plate to share the weight, which increases the support stability. At the same time, when disassembling, only the nut needs to be loosened, and the fixing rod can be slid away from the expansion bolt along the tunnel wall to complete the disassembly.

[0036] The fixing rod 11, the support rod 12 and the support plate are all channel steel. The fixing rod 11 is an arc shape that matches the curvature of the tunnel inner wall. The angle between the tangent at the lower end of the fixing rod 11 and the support rod 12 is 73°.

[0037] The work platform also includes several sections of guardrail 3 installed. The number of guardrail 3 is determined according to the tunnel construction length. The guardrail 3 is 1.2 meters high and 6 meters long. The guardrail 3 includes uprights 32 and horizontal bars 33. The uprights 32 are made of φ48 steel pipe (1.3m long) with φ30 sleeves 31 (15cm long) welded to the bottom. The horizontal bars 33 are made of φ48 steel pipe (6m long) and are connected to the uprights 32 by fasteners. The horizontal spacing is 50cm to form a grid-like rigid protection structure. The end of the support plate away from the inner wall of the tunnel extends out of the platform plate 2 and is fixedly installed with insert rods 15. The sleeves 31 are fitted onto the insert rods 15 to achieve quick fixed installation.

[0038] A 150mm high kick plate 4 is installed on the lower part of the guardrail 3 near the platform 2. It is tied and fixed to the upright 32 by wire ties. The outer side of the guardrail 3 is fully covered with protective netting to prevent tools or materials from falling.

[0039] Working principle: During use, a set of tripods is installed every 2m along the longitudinal direction of the tunnel and fixed to the segment lining with expansion bolts 14; the angle of the tripods is adjusted so that the top support surface is horizontal; four square timbers are laid horizontally on the tripods with uniform spacing; wooden boards are laid on the square timbers and the gaps between the boards are filled and sealed with rubber strips; the bottom round steel of the upright 32 is inserted into the reserved hole of the tripod, and fixed after adjusting the verticality; horizontal bars 33 are installed and connected to the upright 32 with fasteners at 50cm intervals to form a grid structure; protective netting is hung and kickboards 4 are tied; the fasteners and the inserted upright 32 are removed, and the tripod and platform components are stored according to segment classification and transported to the next working face for reuse.

[0040] After the implementation of this technical solution, the installation time for a single platform was reduced from 8 hours to 3 hours compared to traditional operating platforms; no collapse or fall accidents occurred during construction; the material reuse rate reached 90%, and the overall cost was reduced by 35%.

[0041] Expansion bolts 14, guardrails 3, kickboards 4, fasteners, and protective nets are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods, so they will not be described in detail here.

[0042] The foregoing has shown and described the basic principles, main features and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A rapid working platform for the corbel of a shield tunnel roadway, comprising several splicing units connected by fasteners, characterized in that: Each splicing unit includes a platform plate (2), and a triangular bracket (1) is installed at both ends of the platform plate (2). The triangular bracket (1) is installed on the inner wall of the tunnel to facilitate the support of the platform plate (2) and provide the working space for the construction of the shield tunnel lane slab bracket.

2. The rapid working platform for the cantilever bracket of a shield tunnel carriageway according to claim 1, characterized in that: The triangular bracket (1) is fixedly installed on the inner wall of the tunnel by expansion bolts (14).

3. The rapid working platform for the cantilever bracket of a shield tunnel carriageway according to claim 1, characterized in that: The triangular bracket (1) includes a fixed rod (11), a support rod (12) and a support plate. The fixed rod (11) is fixed to the inner wall of the tunnel. The lower end of the support rod (12) is fixedly connected to the fixed rod (11). The upper end of the support rod (12) and the upper end of the fixed rod (11) are respectively connected to both ends of the support plate. The support plate is fixedly connected to the platform plate (2).

4. The rapid working platform for the cantilever bracket of a shield tunnel carriageway according to claim 3, characterized in that: Ear plates are fixedly installed on both sides of the upper end of the fixing rod (11). A slot is opened at the middle position of the lower edge of the ear plate and the middle position of the lower end of the fixing rod (11). The expansion bolt (14) fixes the fixing rod (11) to the inner wall of the tunnel through the slot.

5. A rapid working platform for the cantilever bracket of a shield tunnel carriageway according to claim 2, characterized in that: The fixed rod (11), the support rod (12) and the support plate are all channel steel. The fixed rod (11) is an arc shape that matches the curvature of the tunnel inner wall. The angle between the lower end tangent of the fixed rod (11) and the support rod (12) is 60°-80°.

6. A rapid working platform for the corbel of a shield tunnel carriageway according to claim 2, characterized in that: It also includes a guardrail (3), and a rod (15) is fixedly installed on the platform plate (2) at the end of the support plate away from the inner wall of the tunnel. A sleeve (31) is installed at the lower end of the guardrail (3) corresponding to the position of the rod (15), and the sleeve (31) is fitted on the rod (15).

7. A rapid working platform for the corbel of a shield tunnel carriageway as described in claim 5, characterized in that: A kickboard (4) is installed on the lower part of the guardrail (3) near the platform plate (2).

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