A method for erecting a platform for a sectional roadway in a construction period shaft

Abstract

This application discloses a platform erection method for segmented construction tunnels within a vertical shaft during the infrastructure construction phase. The method includes the following steps: S1, hoisting the bottom steel beam and installing it onto the shaft wall; S2, welding the channel steel sub-beam to the bottom steel beam; S3, erecting full-span scaffolding; S4, welding several columns onto the bottom steel beam; S5, installing a top steel beam at the top of the columns; S6, installing channel steel connecting bars on the top steel beam and laying a platform steel plate on top of the top steel beam. This platform erection method for segmented construction tunnels allows for the corresponding erection of full-span scaffolding at the location of the horizontal tunnel, reducing scaffolding material consumption by more than 30% and shortening erection time by 40%, effectively improving construction efficiency. Furthermore, the construction of a double-layer support system consisting of a bottom support foundation, columns, full-span scaffolding, and the platform for the segmented construction tunnel solves the stress concentration problem during heavy equipment operation, significantly improving the stability of the full-span scaffolding.

Description

Technical Field

[0001] This application relates to the field of platform construction technology, and in particular to a platform construction method for segmented roadways within a vertical shaft during the infrastructure construction phase. Background Technology

[0002] Segmented tunnels refer to horizontal tunnels developed in stages at different depths (elevations) within a vertical shaft.

[0003] In existing infrastructure construction, the erection of construction platforms for segmented tunnels within vertical shafts often involves using full-span scaffolding to erect the entire platform directly from the bottom of the shaft to the target elevation, or forming temporary platforms by simply splicing steel sections together and laying planks. Specifically, steel pipes and fasteners are used to erect the platform layer by layer at certain intervals from the bedrock surface at the bottom of the shaft to the target working elevation, with scaffold boards or steel plates laid on top to form the platform.

[0004] However, existing scaffolding erection methods have the following technical drawbacks: The overall full-span scaffolding requires a large erection height, consumes a lot of materials, and has a long erection period. Furthermore, high-rise scaffolding has poor stability and is prone to swaying due to the limited diameter of the shaft. The platform's load-bearing structure design lacks precise stress calculations, making it susceptible to localized stress concentration during heavy equipment (such as loaders), posing a risk of structural deformation and collapse. The connection between the platform and the shaft wall and supporting structure lacks effective fixing measures, resulting in weak overall overturning resistance and making it difficult to adapt to the complex environment of shaft construction.

[0005] Therefore, it is necessary to propose a platform erection method for segmented roadways in vertical shafts during the infrastructure construction period, and accelerate the iterative convergence speed, which has become an important technical problem that urgently needs to be solved. Summary of the Invention

[0006] This application provides a platform erection method for segmented roadways within vertical shafts during the infrastructure construction phase. It aims to address the problems of existing full-span scaffolding, which suffers from high heights, high material consumption, long erection periods, poor stability, and swaying issues due to shaft diameter limitations. Furthermore, the platform's load-bearing structure design lacks precise stress calculations, leading to localized stress concentrations during heavy equipment (such as loaders), posing risks of structural deformation and collapse. Finally, the platform lacks effective fixing measures for connections to the shaft wall and supporting structures, resulting in weak overall overturning resistance and difficulty adapting to the complex environment of vertical shaft construction.

[0007] To achieve the above objectives, this application proposes a platform erection method for a segmented construction roadway within a vertical shaft during the infrastructure construction phase. The platform erection method for the segmented construction roadway includes the following steps: S1, hoisting the bottom steel beam and installing it onto the shaft wall; S2, welding the channel steel sub-beam to the bottom steel beam to form a bottom support foundation; S3, erecting full-span scaffolding layer by layer from the bottom support foundation upwards; S4, welding several columns onto the bottom steel beam; S5, installing a top steel beam at the top of the several columns; S6, installing channel steel connecting bars on the top steel beam and laying a platform steel plate on top of the top steel beam to form the platform for the segmented construction roadway; wherein, the several columns are located below the stress area of ​​the loader tires.

[0008] In some embodiments, the platform erection method for the construction segment roadway further includes the following steps: S11, lowering the required bottom steel beam into the metering chamber; S12, chiseling bracket holes and beam sockets at preset positions on the shaft wall, installing brackets and anchoring them; S13, hoisting the bottom steel beam and welding it to the bracket.

[0009] In some embodiments, the platform erection method for the construction segment roadway further includes the following steps: S7, constructing water pits and installing water pumps and pipelines on the well wall below the bottom steel beam; S8, reserving drainage channels on the platform steel plate and sealing them; S9, installing guardrails and safety nets.

[0010] In some embodiments, the platform erection method for the construction segment roadway also includes a construction preparation step, the specific contents of which are as follows: dismantling the original equipment and facilities in the shaft, processing full-span scaffolding members, bottom steel beams, top steel beams, channel steel sub-beams, channel steel connecting bars, corbels and additional plates on the ground surface, and cutting and welding steel materials according to the design dimensions.

[0011] In some embodiments, a suspended platform is installed inside the shaft. An auxiliary plate is formed by welding multiple connecting channel steels and is connected to the bottom of the suspended platform. A wire rope is welded to the bottom of the suspended platform and is connected to the auxiliary plate by welding. A thin steel plate is welded to the top of the auxiliary plate to form a temporary working platform.

[0012] In some embodiments, the construction steps of the plurality of columns in S4 above further include: welding a plurality of column fixing rods onto the columns; wherein the column fixing rods include column fixing horizontal rods, column fixing vertical rods, and column fixing diagonal braces.

[0013] In some embodiments, during the erection of the full-span scaffolding in S3 described above, the scaffold boards are tied and fixed to the full-span scaffolding.

[0014] In some embodiments, the bracket includes: a first structural plate having a plurality of anchoring holes spaced apart, through which anchor rods pass and are inserted into the well wall to achieve a connection between the first structural plate and the well wall; a second structural plate being connected to the first structural plate by welding, with a bottom steel beam and a top steel beam resting on the second structural plate; and a third structural plate having a first plane and a second plane, the first plane being perpendicular to the second plane, the third structural plate being welded to the first structural plate through the first plane, the third structural plate being welded to the second structural plate through the second plane, the third structural plate being welded to the first structural plate, and the third structural plate being welded to the second structural plate.

[0015] This application proposes a platform erection method for segmented construction roadways within a vertical shaft during the infrastructure construction phase. The method includes the following steps: S1, hoisting the bottom steel beam and installing it onto the shaft wall; S2, welding the channel steel sub-beam to the bottom steel beam to form a bottom support foundation; S3, erecting full-span scaffolding layer by layer from the bottom support foundation upwards; S4, welding several columns onto the bottom steel beam; S5, installing a top steel beam at the top of the columns; S6, installing channel steel connecting bars on the top steel beam and laying a platform steel plate on top of the top steel beam to form the platform for the segmented construction roadway; wherein, the columns are located below the load-bearing area of ​​the loader tires. This platform erection method for segmented construction roadways involves erecting full-span scaffolding corresponding to the location of the horizontal roadway. This segmented erection method reduces full-span scaffolding material consumption by more than 30% and shortens erection time by 40%, effectively improving construction efficiency. Furthermore, a double-layer support system was constructed, consisting of a bottom support foundation, 12 steel columns in the middle, a full-span scaffold, and a platform for the construction segment roadway. This system solved the stress concentration problem during heavy equipment operation, reduced the maximum bending stress of the top and bottom steel beams by more than 45%, reduced the platform settlement of the construction segment roadway by 70%, and significantly improved the stability of the full-span scaffold. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a technical roadmap of a method for erecting a platform in a segmented tunnel within a vertical shaft during the infrastructure construction phase, as described in one embodiment of this application. Figure 2 This is a cross-sectional view of a vertical shaft in one embodiment of this application; Figure 3This is a schematic diagram of the structure of a cow leg in one embodiment of this application; Figure 4 This is a schematic diagram of the processing of an additional disk in one embodiment of this application.

[0017] Among them, the well wall 1, the suspended basket 2, the platform of the construction section roadway 3, the column 4, the column fixing horizontal bar 5, the column fixing vertical bar 6, the column fixing diagonal brace 7, the corbel 8, the first structural plate 81, the second structural plate 82, the third structural plate 83, the anchor bolt 9, and the auxiliary plate 10. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0019] See Figure 1 , Figure 2 and Figure 3 As shown, this application discloses a method for erecting platform 3 in a segmented construction roadway within a vertical shaft during the infrastructure construction phase. The method for erecting platform 3 in a segmented construction roadway includes the following steps: S1. Hoist the bottom steel beam and install it onto the well wall 1; S2. Weld the channel steel sub-beam to the bottom steel beam to form the bottom support foundation; HW200×200mm steel is used as the bottom steel beam on the -478m elevation platform, and 140 channel steel is used as the channel steel sub-beam.

[0020] S3. Erect full-span scaffolding layer by layer from bottom to top on the bottom support foundation; erect φ48.3×3.6mm full-span scaffolding in the section from -478m to -468m of the vertical shaft. The erection of the full-span scaffolding includes the installation of ground bracing, uprights, horizontal bars and scissor bracing, etc. The ends of the horizontal bars are tightened against the shaft wall 1 with adjustable supports. The scissor bracing is a four-sided continuous scissor bracing. The horizontal and vertical spacing of the uprights of the full-span scaffolding is 3.0m×1.5m and the step distance is 1.8m. The bottom of the full-span scaffolding is erected on the bottom support foundation.

[0021] It can be understood that erecting full-span scaffolding from the bottom support foundation, compared to erecting full-span scaffolding from the bottom of the shaft, can effectively reduce the erection height of the full-span scaffolding and improve stability. Furthermore, erecting full-span scaffolding corresponding to the locations of the horizontal tunnels reduces scaffolding material consumption by more than 30% and shortens erection time by 40%, effectively improving construction efficiency.

[0022] The adjustable supports can be threaded rod top supports or U-shaped support plates. These adjustable supports and scissor braces effectively limit the horizontal swaying of the full-span scaffolding, significantly improving the overall stability and anti-overturning capacity. Combined with the segmented erection of the full-span scaffolding to reduce its overall height, the structural stability of the full-span scaffolding can be greatly improved, reducing the likelihood of safety accidents during construction.

[0023] S4. Weld several columns 4 onto the bottom steel beam; S5. Install a top steel beam on the top of the columns 4; S6. In the load-bearing area of ​​the loader tires, install channel steel connecting bars on the top steel beams, and lay platform steel plates on top of the top steel beams to form platform 3 of the construction segment roadway; wherein, the columns 4 are located below the load-bearing area of ​​the loader tires. Two HW200×200mm bottom steel beams and 12 HW150×150mm columns 4 are added at the -478m elevation to form a double-layer load-bearing support. The -468m elevation platform uses HW200×200mm steel for the top steel beams, with a center-to-center spacing of 500mm, and two 140 channel steel connecting bars are welded between the top steel beams.

[0024] The double-layer load-bearing structure is formed as follows: a bottom support foundation is formed, rooted in the well wall 1; then, on the -478m elevation platform, corresponding to the tire trajectory area of ​​the loader, 12 steel columns 4 are welded vertically upwards; finally, top steel beams are installed at the top of the columns 4 and around the top of the full-span scaffolding, with channel steel connecting bars welded between the top steel beams to form a horizontal lattice, and a 10mm full-welded platform steel plate is laid on top to form an integrated working platform. Thus, the double-layer rigid force transmission structure, consisting of the bottom support foundation, the 12 steel columns 4 in the middle, the full-span scaffolding, and the platform 3 of the construction segment roadway, is fully formed. This double-layer support system solves the stress concentration problem during heavy equipment operation, reduces the maximum bending stress of the top and bottom steel beams by more than 45%, reduces the settlement of platform 3 of the construction segment roadway by 70%, and significantly improves the stability of the full-span scaffolding.

[0025] Understandably, the double-layer load-bearing structure completely decouples the dynamic operating load of the heavy-duty loader from the static support function of the full-span scaffolding. The closely spaced top steel beams of the -468m elevation platform and the platform steel plate form a horizontal rigid box, distributing the concentrated tire load into a surface load. The bottom support foundation of the -478m elevation platform transfers all the load to the surrounding rock of the shaft wall. The 12 columns in the middle are arranged in 4 groups along the heavy load trajectory, bypassing the full-span scaffolding to form a rigid short column direct transmission path, eliminating the risk of elastic deformation and fastener slippage under heavy loads inherent in traditional full-span scaffolding. With only 10m of full-span scaffolding required, the double-layer load-bearing structure achieves load-bearing stiffness and anti-overturning capacity far exceeding that of traditional full-span scaffolding, solving the structural safety problem of heavy mechanized operating platforms in tall vertical shafts.

[0026] Specifically, the platform 3 erection method for the segmented construction roadway involves erecting full-span scaffolding at the corresponding locations in the horizontal roadway. This segmented erection method reduces full-span scaffolding material consumption by more than 30% and shortens erection time by 40%, effectively improving construction efficiency. Furthermore, the construction of a double-layer support system consisting of a bottom support foundation, 12 central steel columns 4, full-span scaffolding, and platform 3 of the segmented construction roadway solves the stress concentration problem during heavy equipment operation. The maximum bending stress of the top and bottom steel beams is reduced by more than 45%, the settlement of platform 3 in the segmented construction roadway is reduced by 70%, and the stability of the full-span scaffolding is significantly improved.

[0027] See Figure 2 and Figure 3 As shown, in some embodiments, the method for erecting platform 3 in the construction segment roadway further includes the following steps: S11, lowering the required bottom steel beam into the metering chamber; S12, chiseling bracket 8 holes and beam sockets at preset positions in the shaft wall 1, installing bracket 8 and anchoring it; S13, hoisting the bottom steel beam and welding it to the bracket 8 for fixation. The bracket 8 and beam socket combination fixing method, through the cooperative structure of the outer support embedded in the inner, forms a dual constraint of vertical support and horizontal fixation between the bottom steel beam and the shaft wall. The corbel 8 bears the vertical shear force at the end of the bottom steel beam, while the beam socket deeply embeds the end of the bottom steel beam into the rock mass of the well wall 1 and solidifies it with grout. This transforms the end of the bottom steel beam from a simply supported hinged joint to a bending-resistant solidified joint. At the same time, the surrounding rock walls provide horizontal anti-slip and anti-torsional constraints for the end of the bottom steel beam, expanding the load transfer from a single weld path to a dual-path system with the weld and bearing surface connected in parallel. This significantly improves the reliability of the bottom support foundation and allows the bottom support foundation to better transfer the load to the well wall 1.

[0028] Among them, the beam socket refers to a groove or hole manually chiseled in the shaft wall, specifically used to place and secure the end of the bottom steel beam. It is preferred to use a YT-28 pneumatic rock drill to chisel the eight bracket holes and beam sockets.

[0029] See Figure 2As shown, in some embodiments, the method for erecting platform 3 in the construction segment roadway further includes the following steps: S7, constructing a water pit and installing a water pump and pipeline on the shaft wall 1 below the bottom steel beam; constructing a water pit and installing a water pump and pipeline in the -528m middle section. S8, reserving and sealing drainage channels on the platform steel plate; reserving a 600×630mm closed drainage channel for lowering a water pump at the edge of the platform, and configuring a WQ20-75-7.5kW water pump to drain the water gushing from the -528m middle section to the -468m middle section for external transport by bucket. S9, installing guardrails and safety nets. A rotatable cover plate is installed on the platform steel plate. The cover plate can be rotated to close the drainage channel. During construction, the drainage channel can be opened or closed according to the specific working conditions. Guardrails and safety nets are installed around the drainage channel to prevent construction personnel from falling. The above method achieves directional drainage of gushing water, avoiding water accumulation that affects construction. Furthermore, the integrated drainage channel design reduces the drainage time to meet standards by 50%, completely solving the problem of water accumulation at the bottom of the well and ensuring construction continuity.

[0030] Understandably, the specific parameters of the water pump can be selected based on the on-site water inflow, ensuring drainage efficiency. The drainage channel can be designed as a circle with a diameter ranging from 500mm to 700mm. The water pump model can be adjusted to WQ15-80-7.5kW or WQ25-70-7.5kW according to the water inflow to ensure a match between head and drainage capacity.

[0031] In some embodiments, the method for erecting platform 3 in the construction segment roadway also includes a construction preparation step, the specific contents of which are as follows: dismantle the original equipment and facilities in the shaft, process full-span scaffolding members, bottom steel beams, top steel beams, channel steel sub-beams, channel steel connecting bars, corbels 8 and additional plates 10 on the ground surface, and cut and weld the steel according to the design dimensions.

[0032] In some embodiments, a suspended platform 2 is installed inside the shaft. An auxiliary platform 10 is formed by welding multiple connecting channel steels and is connected to the bottom of the suspended platform 2. A steel wire rope is welded to the bottom of the suspended platform 2, and the steel wire rope is connected to the auxiliary platform 10 by welding. A thin steel plate is welded to the top of the auxiliary platform 10 to form a temporary working platform. The auxiliary platform 10 can serve as a temporary working platform for the installation of the bottom steel beams, reducing the installation difficulty of the bottom steel beams, etc. The auxiliary platform 10 is formed by welding multiple connecting channel steels and is welded to the bottom of the suspended platform 2. The auxiliary platform 10 and the suspended platform 2 are connected by steel wire ropes, and a thin steel plate is welded to the top of the auxiliary platform 10 to form a temporary working platform.

[0033] The auxiliary plate 10 can serve as a temporary work platform for the installation of the bottom steel beam, reducing the difficulty of installing the bottom steel beam and other components.

[0034] Understandably, the original suspended platform 2 was lowered to the middle section at -528m, and a grid-shaped auxiliary plate 10 was fabricated using 140 connecting channel steel. It was suspended by φ20mm steel wire rope and supported against the well wall 1 by adjustable bracing, thereby improving the stability of the auxiliary plate 10.

[0035] In some embodiments, the construction steps of the plurality of columns 4 in S4 above further include: welding multiple column fixing rods onto the columns 4; wherein, the column fixing rods include column fixing horizontal bars 5, column fixing vertical bars 6, and column fixing diagonal braces 7. The column fixing horizontal bars 5, column fixing vertical bars 6, and column fixing diagonal braces 7 are directly or indirectly connected to the columns 4 by welding. The fixing horizontal bars connect each column 4 along the horizontal longitudinal direction, limiting its lateral bending deformation in the heavy load direction; the fixing vertical bars strengthen the cross section of the columns 4 vertically, improving its compressive stiffness and preventing local buckling; the fixing diagonal braces connect the nodes of the columns 4 diagonally, forming a triangular invariant system, effectively resisting the horizontal shear force and torsional tendency generated by the impact of the scraper and the vibration of rock drilling. The three work together to form a three-dimensional lattice column group with redundant force transmission paths from the 12 columns 4 that originally relied solely on the column base welds for independent force transmission, ensuring that the columns 4 do not experience bending instability or lateral tilting under heavy load conditions, and improving the reliability of the double-layer support system.

[0036] In some embodiments, during the erection of the full-span scaffolding in S3 above, the scaffold boards are tied and fixed to the full-span scaffolding. The scaffold boards and the full-span scaffolding together form the operating platform for tunnel excavation, where workers stand to drill, remove slag, and provide support.

[0037] In some embodiments, the bracket 8 includes: a first structural plate 81, on which a plurality of anchoring holes are spaced apart, and an anchor rod 9 passes through the anchoring holes and is inserted into the well wall 1 to achieve the connection between the first structural plate 81 and the well wall 1; the first structural plate 81 is 500mm long and 400mm wide, and the first structural plate 81 is provided with two rows of anchoring holes along the width direction, each row of anchoring holes including 3 anchoring holes spaced apart along the length direction, and an anchor rod 9 is inserted into each anchoring hole. After the anchor rod 9 is inserted into the well wall 1, the first structural plate 81 is connected by welding. Through the first structural plate 81 and the anchor rod 9, the bracket 8 is reliably connected to the well wall 1. The second structural plate 82 is connected to the first structural plate 81 by welding. The bottom steel beam and the top steel beam rest on the second structural plate 82. The second structural plate 82 is used to support the bottom steel beam. The third structural plate has a first plane and a second plane, with the first plane perpendicular to the second plane. The third structural plate is welded to the first structural plate through the first plane and to the second structural plate through the second plane. The third structural plate 83 is used to reinforce the second structural plate 82, preventing deformation of the second structural plate 82 under load and improving the reliability of the bracket 8. The third structural plate 83 is preferably triangular prism-shaped and also has front and rear surfaces and beveled surfaces.

[0038] The thickness of the first structural plate 81, the second structural plate 82, and the third structural plate is 20mm. The top steel beam is also connected to the well wall 1 via brackets 8, improving the stability of the double-layer load-bearing support system.

[0039] In this embodiment, the specific test parameters are as follows: Test Example 1: Shaft section height 10m (-478m to -468m), top steel beam center-to-center spacing 400mm, column spacing 4 1.2m, platform steel plate thickness 8mm, water pump head 70m, drainage capacity 15m³ / h. Test Example 2: Shaft section height 10m (-478m to -468m), top steel beam center-to-center spacing 500mm, column spacing 4 1.5m, platform steel plate thickness 10mm, water pump head 75m, drainage capacity 20m³ / h. Test Example 3: Shaft section height 10m (-478m to -468m), top steel beam center-to-center spacing 600mm, column spacing 4 1.8m, platform steel plate thickness 12mm, water pump head 80m, drainage capacity 25m³ / h. The testing methods are as follows: Structural strength test: A 13t (127.4KN) electric loader was used to travel back and forth on the platform. The maximum bending stress of the steel beams was detected by stress sensors, and the maximum settlement of the platform was measured by displacement gauges. Stability test: The horizontal displacement of the top of the scaffolding was monitored and data was recorded continuously for 24 hours. Drainage efficiency test: A water inflow of 4m³ / h was simulated, and the time it took for the drainage system to lower the water level in the -528m section to the safety line was recorded. Construction efficiency test: The total working hours from material placement to platform erection were calculated and compared with the existing scheme. The specific test results are shown in Table 1. The existing scheme uses full-span scaffolding to be erected directly from the bottom of the well to the target elevation. A top steel beam is erected at the design elevation, and a platform steel plate is laid on top of the top steel beam to form platform 3 of the construction segment roadway.

[0040]

[0041] Table 1 In the three test cases, the maximum bending stress of the top steel beam was less than the allowable bending stress of steel (157 MPa), the platform settlement and the displacement of the full-span scaffolding were far lower than the existing scheme, the drainage efficiency was improved by more than 50%, and the erection time was shortened by more than 40%. Test case 2 had the best overall performance and fully met the requirements of heavy equipment operation and shaft construction.

[0042] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A method for erecting a platform for segmented construction roadways within a vertical shaft during the infrastructure construction phase, characterized in that, The platform erection method for segmented roadways includes the following steps: S1. Hoist the bottom steel beam and install it onto the well wall; S2. Weld the channel steel sub-beam to the bottom steel beam to form the bottom support foundation; S3. Start from the bottom support foundation and erect full-span scaffolding layer by layer from bottom to top; S4. Weld several columns onto the bottom steel beam; S5. Install top steel beams at the top of several columns; S6. Install channel steel connecting bars on the top steel beam and lay platform steel plates on the top of the top steel beam to form a platform for the construction segment roadway; Several of the columns are located below the stress area of ​​the loader's tires.

2. The platform erection method for segmented construction tunnels within a vertical shaft during the infrastructure construction phase, as described in claim 1, is characterized in that... The platform erection method for segmented roadways also includes the following steps: S11. Lower the required bottom steel beam into the metering chamber; S12. Drill bracket holes and beam sockets at predetermined positions on the well wall, install brackets and anchor them; S13. Hoist the bottom steel beam and weld it to the bracket for fixation.

3. The platform erection method for segmented construction tunnels within a vertical shaft during the infrastructure construction phase, as described in claim 2, is characterized in that... The platform erection method for segmented roadways also includes the following steps: S7. Construct a water pit on the well wall below the bottom steel beam and install a water pump and pipeline; S8. Reserve and seal drainage channels on the platform steel plate; S9. Install guardrails and safety nets.

4. The platform erection method for segmented construction roadways within a vertical shaft during the infrastructure construction phase, as described in claim 1, is characterized in that... The platform erection method for the segmented tunnel also includes construction preparation steps, the specific contents of which are as follows: dismantle the original equipment and facilities in the shaft, process the full-span scaffolding members, bottom steel beams, top steel beams, channel steel sub-beams, channel steel connecting bars, corbels and additional plates on the ground, and cut and weld the steel according to the design dimensions.

5. The platform erection method for segmented construction roadways within a vertical shaft during the infrastructure construction phase, as described in claim 4, is characterized in that... A suspended platform is installed inside the shaft. The auxiliary plate is formed by welding multiple connecting channel steels and is welded to the bottom of the suspended platform. The auxiliary plate and the suspended platform are connected by steel wire ropes. The bottom of the suspended platform is welded with steel wire ropes, and the steel wire ropes are connected to the auxiliary plate by welding. A thin steel plate is welded to the top of the auxiliary disk to form a temporary working platform.

6. The platform erection method for segmented construction roadways within a vertical shaft during the infrastructure construction phase, as described in claim 1, is characterized in that... The construction steps for several columns in S4 above also include: welding multiple column fixing rods onto the columns; The column fixing rod includes a column fixing horizontal rod, a column fixing vertical rod, and a column fixing diagonal brace.

7. The platform erection method for segmented construction tunnels within a vertical shaft during the infrastructure construction phase, as described in claim 1, is characterized in that... During the erection of the full-span scaffolding in S3 above, the scaffold boards are tied and fixed to the full-span scaffolding.

8. The platform erection method for segmented construction tunnels within a vertical shaft during the infrastructure construction phase, as described in claim 2, is characterized in that... The cow leg includes: A first structural plate is provided with a plurality of anchoring holes spaced apart. An anchor rods pass through the anchoring holes and are inserted into the well wall to achieve the connection between the first structural plate and the well wall. The second structural plate is connected to the first structural plate by welding, and the bottom steel beam and the top steel beam are respectively placed on the second structural plate; The third structural plate has a first plane and a second plane. The first plane is perpendicular to the second plane. The third structural plate is welded to the first structural plate through the first plane. The third structural plate is welded to the first structural plate through the first plane. The third structural plate is welded to the second structural plate through the second right-angled surface.

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