Transportation and installation system and installation method for stair flight plates of pedestrian passages at entrances and exits of subway stations

Abstract

The invention discloses a transportation and installation system and installation method for stair flight plates of an entrance and exit walking channel of a subway station. The transportation and installation system for the stair flight plates comprises an intelligent travelling crane, a winch and the entrance and exit channel. The entrance and exit channel comprises an escalator channel and a walking channel which are arranged side by side; ladder columns are arranged on the two sides of the walking channel at intervals; the intelligent travelling crane is provided with a base, mechanical telescopic legs and a fixed table; the mechanical telescopic legs are installed at the four corners of the base, each mechanical telescopic leg is formed by connecting 2-4 intelligent lifting supporting columns in series, the fixed table is located above the mechanical telescopic legs, the bottom of the fixed table is connected with the four mechanical telescopic legs, and limiting and positioning structures matched with each other are arranged between the fixed table and the stair flight plate; the winch is installed on the top platform section of the walking channel and connected with the intelligent traveling crane through a steel wire rope. The method is high in feasibility and convenient to construct, the construction efficiency is improved, manpower is reduced, and transportation and installation of the stair flight plate of the access walking channel can be effectively met.

Description

Technical Field

[0001] This invention belongs to the field of subway construction technology, specifically relating to a transportation and installation system and method for stair slabs in pedestrian passages at subway station entrances and exits. Background Technology

[0002] With the rapid development of rail transit construction in my country, subway station construction is accelerating its transformation towards prefabricated technology. However, the transportation of large prefabricated components, such as prefabricated stairs and platform slabs, still relies mainly on the traditional manual and mechanical collaboration model, which has become a key bottleneck restricting the improvement of construction efficiency and quality.

[0003] In current construction practice, cast-in-place entrance stairs are the most common method. While cast-in-place construction can adapt to complex stair shapes and dimensions and can be flexibly adjusted according to actual site conditions, it also has many drawbacks: complex formwork procedures, large amount of on-site wet work, long construction period, high labor input, significant environmental impact from noise and dust generated during construction, and difficulty in accurately controlling installation quality. With the advancement of the "dual carbon" target, the application of prefabricated stairs in subway stations is gradually increasing, but it faces severe challenges in actual installation: subway station entrances and exits cannot be hoisted by openings in the roof slab, and the prefabricated stair components are heavy. There has been a lack of suitable transportation and installation equipment for subway entrances and exits, resulting in a high dependence on manual operation during installation, low construction efficiency, and seriously hindering the large-scale application and development of prefabricated stairs at subway station entrances and exits. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an intelligent vehicle transportation system and its construction method for the stair slab of the pedestrian passage at the entrance and exit of a subway station, which is highly feasible, low risk, improves construction efficiency, reduces manpower, and can effectively meet the transportation function of prefabricated components in the station. This system is used to solve the problem that the installation process of subway stations is highly dependent on manual operation and has low construction efficiency because the entrance and exit cannot be hoisted by opening the top plate.

[0005] To achieve the above-mentioned technical effects, the technical solution adopted by the present invention is as follows: A system for transporting and installing escalator slabs in a pedestrian walkway at a subway station entrance is characterized by comprising an intelligent trolley, a winch, and an entrance / exit passage. The entrance / exit passage has a bottom platform section, a ramp section, and a top platform section connected sequentially along its direction. The entrance / exit passage includes parallel escalator / elevator passages and a pedestrian walkway for installing escalator slabs. Ladder columns for supporting the escalator slabs are spaced apart on both sides of the pedestrian walkway. The intelligent trolley has a base, mechanical telescopic legs, and a fixed platform. The base has wheels, and the mechanical telescopic legs are installed at the four corners of the base. Each mechanical telescopic leg is composed of 2-4 intelligent lifting support columns connected in series. The fixed platform is located above the mechanical telescopic legs, and its bottom is connected to the four mechanical telescopic legs. A matching limiting structure is provided between the fixed platform and the escalator slab. The winch is installed on the top platform section of the pedestrian walkway and is connected to the intelligent trolley via a steel wire rope to control the intelligent trolley's up-and-down movement along the ramp section of the pedestrian walkway.

[0006] Furthermore, two parallel carriage tracks are installed on the bottom plate of the ramp section of the pedestrian passage, and the carriage wheels on both sides of the intelligent carriage are correspondingly limited and connected to the two carriage tracks.

[0007] Furthermore, a steel plate is attached to the connection between the top platform section and the ramp section of the pedestrian passage. The upper edges of the front and rear ends of the steel plate are made into bevels, and the corners in the middle of the steel plate are ground into smooth arc surfaces.

[0008] Furthermore, the fixing platform is a square frame beam, and the frame beam is provided with fixing holes that match the lifting hole positions of the stair slab. The fixing holes of the frame beam and the lifting holes of the stair slab form a limiting positioning structure.

[0009] The present invention also provides a method for installing stair slabs based on the above-mentioned stair slab transportation and installation system, the method comprising the following construction steps: S1. Cast a stair column at regular intervals on both sides of the bottom slab of the sloping section of the pedestrian passage, and make the spacing between two adjacent stair columns match the size of the precast stair section slab to be erected in that section. S2. Install a winch and place a smart crane in the pedestrian walkway, and connect the outer end of the winch's wire rope to the smart crane; S3. The prefabricated stair slab is lifted by a crane to the fixed platform of the intelligent crane, and the stair slab is fixed to the fixed platform by a limiting structure; S4. The intelligent crane is pulled down by the wire rope controlled by the winch. During the descent of the intelligent crane, the fixed platform on the intelligent crane crosses over each ladder column. After reaching the designated installation position, the four mechanical telescopic legs slowly retract downwards, so that the prefabricated ladder section slab slowly descends to the corresponding installation position of the ladder column. After ensuring that the ladder column does not slip or deviate, the limiting and fixing connection between the intelligent crane and the ladder section slab is released, so that the ladder section slab sits on the ladder column at that position. S5. Continue to retract the mechanical telescopic legs to the set lowest position, and the winch will pull the intelligent trolley to the initial position at the entrance of the pedestrian passage; S6. The mechanical telescopic leg rises and resets, and steps S3-S5 are repeated to continue transporting and installing the next stair section. This process is repeated until the last two stair sections remain to be transported and installed. S7. The last two stair slabs were transported and installed using ground hoisting.

[0010] Furthermore, while performing step S1 to pour the ladder columns, two trolley tracks are laid on the bottom slab of the sloping section of the pedestrian walkway to define the positions of the left and right wheels of the intelligent trolley, so as to ensure that the center line of the transported ladder slab and the center line of the pedestrian walkway are always on the same elevation.

[0011] Furthermore, in step S4, when installing the stair slab, the wet concrete bonding method is used to connect and fix the stair slab section to the previous stair slab section.

[0012] Furthermore, in step S2, the winch is installed on the top platform section of the pedestrian walkway, and the intelligent trolley connected to the winch wire rope is positioned at the upper end of the slope section near the top platform section for the initial transport and installation of the ladder section, with the trolley wheels located on the trolley track.

[0013] Furthermore, before the intelligent vehicle performs transportation and installation of the ladder section, the installation method also includes attaching a steel plate at the connection between the top platform section and the ramp section of the pedestrian passage and directly below the wire rope, and making the upper edges of the front and rear ends of the steel plate into bevels, and grinding the middle corner of the steel plate into a smooth arc surface.

[0014] Furthermore, in step S6, after the intelligent trolley has completed all its transportation and installation tasks, the winch controls the unloaded intelligent trolley to move to the initial position on the slope section or the top platform section via a wire rope, and then the intelligent trolley is lifted to the ground by a crane, while the winch is removed.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention transforms the transportation and installation of prefabricated subway components from "manual-driven" to "mechanically intelligent-driven," reducing manual labor input, improving construction efficiency, and significantly lowering labor costs and construction risks. Its standardized and modular transportation and installation process solves the problem of poor adaptability of traditional processes, providing a universal solution for special scenarios in subway construction. It promotes the development of subway construction towards less manpower and intelligence, fills a technological gap in the industry, and is of great significance for improving the level of rail transit construction in my country, accelerating the popularization of prefabricated technology, and helping to achieve the goals of green construction and high-quality development.

[0016] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the elevation structure of the ladder section slab transportation and installation system of the present invention; Figure 2 This is a schematic diagram of the planar structure of the ladder section slab transportation and installation system of the present invention; Figure 3 A top view of the intelligent crane with load-bearing ladder slab; Figure 4 for Figure 3 Sectional view along axis AA; Figure 5 for Figure 3 BB-direction sectional view; Figure 6 This is a schematic diagram showing the state of the first step plate in the intelligent vehicle transportation system of this invention. Figure 7 This is a schematic diagram showing the state of the intelligent vehicle of the present invention when the first step plate is installed and seated. Figure 8 This is a schematic diagram showing the state of the intelligent overhead crane lifting off the pedestrian walkway according to the present invention; Figure 9 This is a schematic diagram showing the state of a slab being lifted and installed by a crane during construction according to the present invention; Figure 10 This is a schematic diagram of the pedestrian walkway facade structure after the completion of the construction of this invention.

[0018] The labels and their corresponding names in the diagram are as follows: 1. Crane, 2. Ladder slab, 3. Intelligent overhead crane, 31. Base, 32. Mechanical telescopic legs, 33. Mounting platform, 34. Wheels, 35. Restriction structure, 4. Entrance / exit passage, 4a. Escalator / elevator passageway, 4b. Pedestrian passageway, 41. Bottom platform section, 42. Slope section, 43. Top platform section, 44. Ladder column, 45. Crane track, 5. Winch, 6. Wire rope, 7. Steel plate. Detailed Implementation Example 1

[0019] like Figure 1-5 As shown, a transportation and installation system for stair slabs in a subway station entrance / exit passage is disclosed. The system includes a crane 1, stair slabs 2, an intelligent trolley 3, an entrance / exit passage 4, and a winch 5. The stair slabs used for installation on the entrance / exit passage 4 adopt a standardized and modular design. The stair slabs are prefabricated into multi-segment stair slabs 2 in a factory and transported to the construction site for assembly and fixing. The intelligent trolley 3 and the winch 5 are located on the entrance / exit passage 4. The winch 5 is connected to the intelligent trolley 3 via a steel wire rope 6, used to control the intelligent trolley 3's forward and backward movement on the entrance / exit passage 4. The crane 1 is located on the ground outside the upper entrance of the entrance / exit passage 4, used to hoist the stair slabs 2 to be installed onto the intelligent trolley 3 and to directly hoist the last two stair slabs 2 to the ramp section 42 near the entrance / exit of the passage, as well as the stair slab 2 at the connection point between the top platform section 43 and the ramp section 42. The intelligent trolley 3 is used to receive the stair slabs 2 hoisted from the crane 1 and transport them to the designated positions. Specifically, The entrance / exit passage 4 has a bottom platform section 41, a ramp section 42, and a top platform section 43 connected sequentially from bottom to top. The entrance / exit passage 4 includes a parallel escalator passage 4a and a pedestrian passage 4b ​​for installing the stair slabs 2. Multiple stair columns 44 for supporting the stair slabs 2 are spaced apart on both sides of the pedestrian passage 4b. The stair columns 44 on both sides correspond one-to-one in elevation, and each pair of adjacent stair columns 44 at different elevations is used to support one stair slab 2. Two parallel travel rails 45 are installed on the bottom plate of the ramp section 42 of the pedestrian passage 4b ​​(the ends of the two parallel travel rails 45 can extend outwards to the other ends of the bottom platform section 41 and the top platform section 43, depending on actual needs). The wheels 34 on both sides of the intelligent trolley 3 are connected to the travel rails 45 on both sides to ensure that the intelligent trolley 3 moves in a straight line on the ramp section 42. Preferably, the middle of the travel track 45 protrudes upwards, and the middle of the travel wheels 34 on both sides of the intelligent travel vehicle 3 is provided with a limiting groove that matches the protruding part of the travel track 45. The intelligent travel vehicle 3 is limited and connected to the travel track 45 through the limiting groove of the travel wheels 34.

[0020] The intelligent crane 3 also includes a base 31, mechanical telescopic legs 32, and a fixed platform 33. Crane wheels 34 are fixedly installed at the four corners of the lower surface of the base 31, and the mechanical telescopic legs 32 are installed at the four corners of the upper surface of the base 31. The mechanical telescopic legs 32 are composed of 2-4 intelligent lifting support columns connected in series. The fixed platform 33 is located above the mechanical telescopic legs 32 and simultaneously connects all four mechanical telescopic legs 32. A matching positioning structure 35 is provided between the fixed platform 33 and the stair section 2. Preferably, the fixed platform 33 is a square frame beam with fixing holes that match the lifting holes of the stair section 2. The fixing holes of the frame beam and the lifting holes of the stair section 2 form the positioning structure 35, which can also serve as the lifting holes of the intelligent crane 3. When the intelligent crane 3 transports the stair section 2, the stair section 2 is placed on the fixed platform 33, and the holes of the positioning structure 35 are aligned with each other and secured by steel wire ropes 6. The winch 5 is installed at one end of the top platform section 43 of the pedestrian passage 4b ​​near the ground entrance. A steel plate 7 is attached to the connection between the top platform section 43 and the ramp section 42 of the pedestrian passage 4b. The upper edges of the front and rear ends of the steel plate 7 are made into bevels by grinding or other methods, and the corner of the steel plate in the middle is ground into a smooth arc surface.

[0021] This invention utilizes a winch connected to an intelligent trolley in a pedestrian walkway. The intelligent trolley is equipped with mechanical telescopic legs, and stair columns are spaced apart on both sides of the walkway's floor slab. Each pair of adjacent stair columns at different elevations is used to support a single stair section. This allows an external crane to hoist the stair section onto the intelligent trolley, enabling the transport and release of the stair section. This solves the problem of high reliance on manual labor and low construction efficiency during subway station construction, where the inability to open openings in the roof slab for large or prefabricated components at entrances and exits leads to low efficiency. It achieves a shift from "manually dominated" to "mechanically and intelligently dominated" transportation and installation of prefabricated subway components, reducing labor input, improving construction efficiency, and significantly lowering labor costs and construction risks. Its standardized and modular transportation and installation process also solves the problem of poor adaptability of traditional processes, providing a universal solution for special scenarios in subway construction. It promotes the development of subway construction towards less manpower and intelligentization, fills a technological gap in the industry, and is of great significance for improving my country's rail transit construction level, accelerating the popularization of prefabricated technology, and contributing to the achievement of green construction and high-quality development goals. Example 2

[0022] A method for installing stair slabs based on the aforementioned stair slab transportation and installation system, such as... Figure 1 , 2 As shown in Figure 6-10, this installation method includes the following construction steps: S1. At regular intervals, a stair column 44 is cast on both sides of the bottom slab of the ramp section 42 of the pedestrian passage 4b. The stair columns 44 on both sides correspond one-to-one in terms of elevation, and the spacing between adjacent stair columns 44 at different elevations matches the size of the precast stair slab 2 to be erected in this section. This ensures that after the precast stair slab 2 is erected on the front and rear stair columns 44 at both ends, there is a gap in the middle of the stair column 44 for wet connection with the front stair column 44 and / or the rear stair column 44. At the same time, two trolley tracks 45 are laid on the bottom slab of the ramp section 42 of the pedestrian passage 4b ​​to define the position of the left and right wheels 34 of the intelligent trolley 3, so as to ensure that the center line of the transported stair slab 2 is always on the same elevation as the center line of the pedestrian passage 4b.

[0023] S2. Install a winch 5 on the top platform section 43 of the pedestrian walkway 4b. Use a crane 1 to lift the intelligent trolley 3 to a position near the top platform section 43 at the upper end of the ramp section 42. Connect the outer end of the wire rope 6 on the winch 5 to the trolley 3, and then disconnect the crane 1 from the intelligent trolley 3. Simultaneously, set the intelligent trolley 3, after connecting the wire rope 6, to this position as the initial position for transporting and installing the stair slab 2.

[0024] S3. The prefabricated stair slab 2 is lifted by crane 1 to the fixed platform 33 of intelligent crane 3, and the stair slab 2 is fixed to the fixed platform 33 by limiting structure 35. Then the connection between crane 1 and stair slab 2 is released. Preferably, stair slab 2 and fixed platform 33 are connected by steel wire rope 6. Although the steel wire rope 6 connection is not as stable as the bolt connection during the downward movement of stair slab 2 driven by intelligent crane 3, the steel wire rope 6 can ensure that the connection between the two is relatively stable and reliable. At the same time, the steel wire rope 6 connection allows for a small amount of movement between stair slab 2 and fixed platform 33. After the mechanical telescopic leg 32 is retracted to a certain extent, it is better and more effective to know whether the stair slab 2 will slip after overlapping the stair column 44. It is also convenient to adjust the stair slab 2 that has slipped or deviated. In actual construction, this can save more installation time than bolt connection.

[0025] S4. The intelligent gantry crane 3 is pulled downwards by the wire rope 6 controlled by the winch 5. During the downward transport phase, the fixed platform 33 on the intelligent gantry crane 3 crosses over each ladder column 44. After reaching the designated installation position, the four mechanical telescopic legs 32 slowly retract downwards, causing the prefabricated ladder section 2 to slowly descend to the corresponding installation position on the ladder column 44. After ensuring that the ladder column 44 does not slip or deviate, the limiting and fixing connection between the intelligent gantry crane 3 and the ladder section 2 is released, allowing the ladder section 2 to sit on the ladder column 44 at that location. After the ladder section 2 is seated, it is connected and fixed to the previous ladder section 2 using a wet concrete splicing method.

[0026] S5. Continue to retract the mechanical telescopic leg 32 to the set lowest position, and the winch 5 pulls the intelligent trolley 3 to the initial position at the entrance of the pedestrian passage 4b.

[0027] S6. The mechanical telescopic leg 32 rises and resets, and the above steps S3-S5 are repeated to continue transporting and installing the next stair section 2. This process is repeated until the last two stair section 2 to be transported and installed remain.

[0028] S7. After the intelligent crane 3 has completed its task of transporting and installing all the ladder slabs 2 and returned to its initial position, it is connected to the intelligent crane 3 via the ground crane 1. After the connection between the intelligent crane 3 and the winch wire rope 6 is disconnected, the intelligent crane 3 is hoisted to the ground, and the winch is removed at the same time. The transportation and installation of the last two ladder slabs 2 are completed by ground hoisting.

[0029] Preferably, before the intelligent trolley 3 transports and installs the ladder section 2, a guide mechanism needs to be installed at the connection between the top platform section 43 and the ramp section 42 of the pedestrian walkway 4b. This mechanism guides the wire rope 6 when the winch 5 pulls the intelligent trolley 3 up and down and / or reduces wear on the wire rope 6 caused by the sharp edges of the top platform section 43 and the ramp section 42. The guide mechanism can be a guide wheel assembly located at the connection between the top platform section 43 and the ramp section 42 of the pedestrian walkway 4b. In this embodiment, the guide mechanism uses a corner steel plate. Specifically, it is a steel plate attached to the connection between the top platform section 43 and the ramp section 42 of the pedestrian walkway 4b, directly below the wire rope 6. The upper edges of the front and rear ends of the steel plate are beveled by grinding or other methods, and the middle corner of the steel plate is ground into a smooth arc surface. In this embodiment, although using a corner steel plate as a guide mechanism is more likely to wear down the wire rope than using a guide wheel assembly, the smooth arc-shaped steel plate makes it easier to control the downward positioning of the unpowered intelligent trolley with a ladder plate load when the winch pulls it downward. Since the intelligent trolley needs to transport and install a small number of ladder plates, the friction loss between the wire rope and the steel plate can be fully tolerated. Furthermore, installing the guide wheel assembly is more convenient and saves time and cost compared to other guide mechanisms.

[0030] This invention combines intelligent overhead cranes with hoists and winches to form a mechanized transportation and installation system to assist in the transportation and installation of ramp sections. This realizes the transformation of the transportation and installation of prefabricated subway components from "manual dominance" to "mechanical intelligent dominance." The upper two stair sections are close to the ground entrance / exit (top platform section and upper end of ramp section), and the crane boom can directly extend to the installation position without complex transfer, resulting in high lifting efficiency and low cost, without the need for intelligent overhead crane intervention. The lower stair section is located in the lower middle part of the ramp section. Due to the limited space in the passage (stair columns on both sides, narrow passage and ramp), the crane boom cannot reach it deeply, and the stair section needs to cross the middle stair column for precise placement. The intelligent overhead crane can smoothly descend along the ramp and install precisely by using track limiters (to ensure centerline alignment), mechanical telescopic legs to adjust height, and limit positioning structures to fix the stair section, while avoiding the high risks and low efficiency of manual handling. The standardized and modular transportation and installation process of the stair slabs solves the problem of poor adaptability of traditional processes, providing a universal solution for special scenarios in subway construction; it promotes the development of subway construction towards less manpower and intelligence, fills the technological gap in the industry, and is of great significance to improving the level of rail transit construction in my country, accelerating the popularization of prefabricated technology, and helping to achieve the goals of green construction and high-quality development.

[0031] It should be noted that although the accompanying drawings of the embodiments of the present invention show two stair slabs transported and installed by the intelligent crane, the actual number of stair slabs transported and installed by the intelligent crane during construction is determined by the actual length of the pedestrian passage, the actual length of the stair slabs, and the actual number of stair slabs. The accompanying drawings of the embodiments also show two stair slabs transported and installed by the crane because during conventional construction of stair slabs in the pedestrian passages at subway station entrances, generally only the top two stair slabs are close to the ground entrance (the top platform section and the upper end of the ramp section), and the crane boom can directly extend to their installation positions. In actual construction, the number of stair slabs installed with the assistance of the crane is based on the maximum number of stair slabs that the crane boom can directly extend to the installation position. This reduces the steps of transferring the stair slabs from the crane to the intelligent crane, saving installation time and improving efficiency. Furthermore, since the crane drive and control, the drive and control of the mechanical telescopic legs of the intelligent crane, and the drive and control of the winch are all conventional settings in the art, this application will not describe them further.

[0032] This invention is not limited to the specific embodiments described above. For those skilled in the art, all modifications made based on the above concept without creative effort fall within the protection scope of this invention.

Claims

1. A system for transporting and installing stair slabs in pedestrian walkways at subway station entrances and exits, characterized in that, The system includes an intelligent crane, a winch, and an entrance / exit passage. The entrance / exit passage has a bottom platform section, a ramp section, and a top platform section connected sequentially along its direction. The entrance / exit passage includes parallel escalator / elevator passages and a pedestrian passage for installing stair slabs. Stair columns for supporting the stair slabs are spaced apart on both sides of the pedestrian passage. The intelligent crane has a base, mechanical telescopic legs, and a fixed platform. The base has wheels, and the mechanical telescopic legs are installed at the four corners of the base. Each mechanical telescopic leg consists of 2-4 intelligent lifting support columns connected in series. The fixed platform is located above the mechanical telescopic legs, and its bottom is connected to the four mechanical telescopic legs. A matching limiting structure is provided between the fixed platform and the stair slabs. The winch is installed on the top platform section of the pedestrian passage and is connected to the intelligent crane via a steel wire rope to control the intelligent crane's up-and-down movement along the ramp section of the pedestrian passage.

2. The subway station entrance / exit pedestrian walkway stair slab transportation and installation system according to claim 1, characterized in that, Two parallel tracks are installed on the bottom plate of the ramp section of the pedestrian walkway, and the wheels of the intelligent vehicle on both sides are correspondingly limited and connected to the two tracks.

3. The subway station entrance / exit pedestrian walkway stair slab transportation and installation system according to claim 1, characterized in that, A steel plate is attached to the connection between the top platform section and the ramp section of the pedestrian passage. The upper edges of the front and rear ends of the steel plate are made into bevels, and the corners in the middle of the steel plate are ground into smooth arc surfaces.

4. The subway station entrance / exit pedestrian walkway stair slab transportation and installation system according to claim 1, characterized in that, The fixing platform is a square frame beam. The frame beam has fixing holes that match the lifting holes of the stair slab. The fixing holes of the frame beam and the lifting holes of the stair slab form a positioning structure.

5. A method for installing stair slabs in pedestrian walkways at subway station entrances and exits based on the stair slab transportation and installation system described in claim 1, characterized in that, The construction steps include the following: S1. Cast a stair column at regular intervals on both sides of the bottom slab of the sloping section of the pedestrian passage, and make the spacing between two adjacent stair columns match the size of the precast stair section slab to be erected in that section. S2. Install a winch and place a smart crane in the pedestrian walkway, and connect the outer end of the winch's wire rope to the smart crane; S3. The prefabricated stair slab is lifted by a crane to the fixed platform of the intelligent crane, and the stair slab is fixed to the fixed platform by a limiting structure; S4. The intelligent crane is pulled down by the wire rope controlled by the winch. During the descent of the intelligent crane, the fixed platform on the intelligent crane crosses over each ladder column. After reaching the designated installation position, the four mechanical telescopic legs slowly retract downwards, so that the prefabricated ladder section slab slowly descends to the corresponding installation position of the ladder column. After ensuring that the ladder column does not slip or deviate, the limiting and fixing connection between the intelligent crane and the ladder section slab is released, so that the ladder section slab sits on the ladder column at that position. S5. Continue to retract the mechanical telescopic legs to the set lowest position, and the winch will pull the intelligent trolley to the initial position at the entrance of the pedestrian passage; S6. The mechanical telescopic leg rises and resets, and steps S3-S5 are repeated to continue transporting and installing the next stair section. This process is repeated until the last two stair sections remain to be transported and installed. S7. The last two stair slabs were transported and installed using ground hoisting.

6. The installation method according to claim 5, characterized in that, While performing step S1 to pour the stair columns, two trolley tracks are laid on the bottom slab of the sloping section of the pedestrian walkway to define the position of the left and right wheels of the intelligent trolley, so as to ensure that the center line of the transported stair slab and the center line of the pedestrian walkway are always on the same elevation.

7. The installation method according to claim 5, characterized in that, In step S4, the concrete wet-jointing method is used to connect and fix the ladder segment to the previous ladder segment when installing the ladder segment slab.

8. The installation method according to claim 6, characterized in that, In step S2, the winch is installed on the top platform section of the pedestrian walkway. The intelligent trolley connected to the winch wire rope is initially positioned at the upper end of the slope section, close to the top platform section, for transporting and installing the ladder slabs, with the trolley wheels located on the trolley track.

9. The installation method according to claim 8, characterized in that, Before the intelligent vehicle performs transportation and installation of the ladder section, the installation method further includes attaching a steel plate at the connection between the top platform section and the ramp section of the pedestrian passage and directly below the wire rope, and making the upper edges of the front and rear ends of the steel plate into bevels, and grinding the middle corner of the steel plate into a smooth arc surface.

10. The installation method according to claim 8, characterized in that, In step S6, after the intelligent trolley has completed all its transportation and installation tasks, the winch controls the unloaded intelligent trolley to move to the initial position on the slope section or the top platform section via a wire rope, and then the intelligent trolley is lifted to the ground by a crane, while the winch is removed.

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