Suspended scaffolding for the shield retaining wall of the subway station roof and its turning method

Abstract

This invention discloses a suspended scaffold and a turning method for a shield retaining wall on the roof slab of a subway station. The scaffold includes a suspended platform with multiple longitudinal main reinforcement bars on its sides. The scaffold also includes multiple hook bars and connectors. Each connector includes an upper screw for engaging with a blind hole on the corresponding hook bar, a lower screw for engaging with a blind hole on the corresponding longitudinal main reinforcement bar, and a centrally located hexagonal prism. All hook bars are divided into a first hook bar for hooking onto the preceding shield retaining wall and a second hook bar for hooking onto the following shield retaining wall. The first hook bar connects to the longitudinal main reinforcement bars on the first wall-facing side of the suspended platform, and the second hook bar connects to each longitudinal main reinforcement bar on the next wall-facing side of the suspended platform. The key to this method is that the operator screws and connects the second hook bar in the suspended platform to hook and tighten the next shield retaining wall, and then loosens the first hook bar to detach it from the preceding shield retaining wall. This scaffold and turning method does not rely on a crane for lifting, nor does it require operators to climb in and out.

Description

Technical Field

[0001] This invention relates to the field of construction technology for subway basement structures, specifically a suspended scaffold for constructing the wall surface treatment of the shield retaining wall on the top slab of a subway basement structure, and a method for using the scaffold to bend between two shield retaining walls. Background Technology

[0002] During subway station construction, the roof slab of the basement structure cannot be sealed off initially; a rectangular shield opening must be left for excavation of the subway tunnel and for the hoisting and removal of the tunnel boring machine after excavation is completed. Of course, various materials used in the later stages of station and tunnel construction also need to pass through this shield opening. To prevent materials from falling, a ring of four shield opening retaining walls will be installed around the shield opening. Furthermore, to restore traffic as soon as possible, backfilling will be carried out on the roof slab as quickly as possible after the main structure of the basement is poured. This backfilled soil will exert significant earth pressure on the shield opening retaining walls; to support this earth pressure, the shield opening retaining walls must be constructed of reinforced concrete.

[0003] After the shield retaining wall is poured and the inner and outer formwork of the wall is removed, various wall treatments are required on the inner surface of the shield retaining wall. These include cutting off the tie bolts on the inner side of the wall, smoothing the tie bolt holes with mortar, filling leaking areas with sealant, repairing defects such as honeycomb and pitting on the concrete wall surface with mortar, and posting or painting warning signs and slogans.

[0004] To facilitate wall treatment on the inner surface of the shield retaining wall, our company has specially designed a suspended scaffold (see the scheme with patent number 2021204625163). During construction, a crane is used to hoist the scaffold down to the shield opening and hook it onto a shield retaining wall. Then, two workers work together: one operator climbs over the retaining wall using a ladder and enters the scaffold to cut tie bolts, apply mortar, and perform other wall surface work, while the other assistant delivers materials into the scaffold and is responsible for pulling and dragging the scaffold along the shield retaining wall from the top plate outside the shield opening. After all four inner walls of the four shield retaining walls are treated, the operator climbs out using a ladder, and then the crane lifts the scaffold away from the shield opening.

[0005] However, the aforementioned suspended scaffolding has a significant drawback in actual construction. The rectangular shield opening has four corners. Each time an assistant worker drags the scaffolding to a corner, an operator needs to climb out of the scaffolding, and then a crane lifts the scaffolding from the previous shield wall and continues lifting it over the corner, turning it around and lowering it to hook onto the next shield wall. Once the hook is secure, the operator climbs back in. In other words, every time a corner is crossed, the operator needs to climb in and out, and the crane needs to lift and lower it. This not only makes the operation cumbersome for workers, requiring frequent high-altitude climbing, but also ties a crane to the scaffolding. During the shield wall treatment, the crane can only wait at the shield opening to lift the scaffolding over the corners, and cannot be used for other purposes for extended periods. This reduces the crane's utilization rate; in other words, a dedicated crane is required for shield wall treatment, resulting in high rental costs and poor economic efficiency. Summary of the Invention

[0006] One technical problem this invention aims to solve is to provide a suspended scaffolding for the shield retaining wall of a subway station roof slab that can turn between two shield retaining walls without relying on a crane for lifting or requiring operators to climb in and out.

[0007] One technical solution of the present invention is to provide a suspended scaffold for the shield retaining wall of a subway station roof slab, which includes a rectangular suspended basket with multiple longitudinal main bars on each of the four sides of the basket; the scaffold also includes multiple hook bars and multiple connectors corresponding to the hook bars; each longitudinal main bar has a lower blind hole with internal threads at its top end; each hook bar has an upper blind hole with internal threads at its bottom end; each connector includes an upper screw for engaging with the upper blind hole of the corresponding hook bar, a lower screw for engaging with the lower blind hole of the corresponding longitudinal main bar, and a central hexagonal prism, the external threads of the two screws being opposite to each other; all hook bars are divided into a first hook bar for hooking onto the previous shield retaining wall and a second hook bar for hooking onto the next shield retaining wall, the first hook bar being connected to the longitudinal main bars on the first wall-attached side of the suspended basket via corresponding connectors, and the second hook bar being connected to each longitudinal main bar on the lower wall-attached side of the suspended basket via corresponding connectors;

[0008] Each hook bar has an outer vertical section, middle horizontal section and inner vertical section with a main roller on a main bearing. The inner ring of the main bearing is concentric with and fixed to the outer vertical section, middle horizontal section or inner vertical section, and the outer ring of the main bearing is fixed to the main roller.

[0009] Each longitudinal main reinforcement bar is equipped with an alarm device to indicate the tightness of the connection with the corresponding hook reinforcement bar.

[0010] Another technical problem that this invention aims to solve is to provide a method for turning between the front and rear shield retaining walls using suspended scaffolding, without relying on cranes for lifting or requiring operators to climb in and out.

[0011] One technical solution of the present invention is to provide a method for using suspended scaffolding to make a turn between a preceding shield retaining wall and a following shield retaining wall, the steps of which are as follows:

[0012] In the initial state, each longitudinal main bar on the first wall side of the suspended platform is connected to the first hook bar. All the first hook bars are hooked to the previous shield wall. The operator works inside the suspended platform, and the assistant works on the top plate outside the shield, pulling the suspended platform forward along the previous shield wall via the cable.

[0013] When the suspended platform reaches the corner, the side of the suspended platform should be close to the shield wall behind it.

[0014] The operator holds a second hook bar and hooks it onto the next shield mouth retaining wall. Then, the upper screw of a connector is initially screwed into the upper blind hole of the second hook bar, and the lower screw of the connector is initially screwed into the lower blind hole of the corresponding longitudinal main bar on the side of the next wall. Then, the operator continues to screw the hexagonal prism of the connector, so that the second hook bar, the connector and the longitudinal main bar are continuously tightened. Finally, the hexagonal prism is completely tightened with an Allen wrench until the firmness alarm device of the longitudinal main bar is triggered. At this time, the second hook bar is firmly hooked onto the next shield mouth retaining wall.

[0015] Repeat the above steps until all the longitudinal main bars on the side of the next wall are securely hooked to the next shield wall by the corresponding second hook bar.

[0016] Use an Allen wrench to loosen the hexagonal prism connector of each longitudinal main bar on the first side of the wall, so that the connector is completely detached from the longitudinal main bar below and the first hook bar above. Then remove all the first hook bars that are still hanging on the previous shield wall after being loosened, so that they can be used to hook the next shield wall.

[0017] The assistant worker stands on the top plate outside the shield opening and continues to drag the basket, making it slide along the next shield opening retaining wall, while the operator stays in the basket to perform wall treatment on the inner surface of the next shield opening retaining wall.

[0018] Compared with existing technologies, the suspended scaffolding for the shield retaining wall of the subway station roof slab with the above structure and the method of using the scaffolding for turning have the following advantages and technical effects.

[0019] Firstly, the most significant feature and advantage of this application lies in achieving a non-lifting turning process without the need for large lifting equipment such as cranes. Specifically, the operator in the suspended basket screws on the second hook to hook and tighten the next shield retaining wall, and then loosens the first hook to detach it from the previous shield retaining wall. This frees up the crane; the suspended basket is only needed to be hoisted to the shield at the beginning of construction and then removed from the shield at the end. The approximately three days spent on wall finishing in between allow the crane to be readily available for other uses, significantly improving crane utilization, saving on operating costs, and enhancing economic efficiency. Furthermore, the operator remains inside the suspended basket throughout the entire turning process, eliminating the need to climb in and out as required by existing technologies, thus significantly reducing the frequency of high-altitude climbing.

[0020] This application innovatively allows the operator to remain in the suspended platform, solving the turning problem. Furthermore, it utilizes a double-ended screw with reverse threads to tighten the corresponding hooks and longitudinal main ribs in the same direction, ensuring a secure and reliable load-bearing connection. By first attaching the second hook and then removing the first, the number of hooks in service is always sufficient to meet load-bearing requirements, guaranteeing safety. Moreover, this application has a significant highlight: while existing technology uses rollers eccentrically mounted on the hanger, this application specifically uses concentric bearings to position the rollers on each segment of the hook. This minimizes the gap between the hook and the wall, allowing the outer and inner vertical segments of the hook to be as close to the wall as possible. This results in a tighter hook connection, enabling the hook to withstand greater torque during tightening of the connectors. The hook exhibits less vibration during tightening, making it easier to hold force and tighten, thus ensuring the connection strength of the longitudinal main ribs, connectors, and hooks, providing structural protection and a safety prerequisite for the entire turning solution.

[0021] Preferably, the alarm device for the firmness is provided with a pressure sensor at the bottom of the lower blind hole of each longitudinal main rib, and an indicator light is provided on the outside of the longitudinal main rib. The indicator light of the same longitudinal main rib is connected to the pressure sensor via a signal line. When the engagement depth between the lower screw and the lower blind hole meets the safety requirements, the bottom end of the lower screw is pressed against the pressure sensor, triggering the indicator light to light up.

[0022] Correspondingly, when turning, if the hexagonal prism of the connector is tightened with an Allen wrench to connect the hook rib and the corresponding longitudinal main rib, the tightening process of the hexagonal prism will stop when the indicator light of the corresponding longitudinal main rib is lit.

[0023] The alarm device described above is reasonably designed. Simply screwing the connecting rod thread to a sufficient depth will allow it to contact the pressure sensor, thereby illuminating the indicator light. Therefore, the above preferred solution clearly demonstrates the firmness of the hook rod and the suspended basket screwing together, making it easy for people to observe.

[0024] As a further preferred option, the suspended platform is equipped with a main controller and an alarm. Each indicator light is connected to the main controller, and the main controller is connected to the alarm. There are n longitudinal main ribs on each side of the suspended platform. When the number of indicator lights that are lit is less than n, the alarm will sound.

[0025] Correspondingly, when the suspended platform slides along any shield retaining wall, if the alarm sounds, the sliding stops, and all the hooks currently engaged with that shield retaining wall are inspected. If any loose connections are found, their hexagonal prisms are tightened again until the corresponding indicator light illuminates. When the suspended platform turns between two shield retaining walls, if the alarm sounds, the process of loosening the hexagonal prisms of the connections is immediately stopped. The hexagonal prisms corresponding to each hook that is still engaged are tightened until the number of indicator lights illuminated is greater than or equal to n.

[0026] The aforementioned optimized solution effectively monitors and eliminates two types of safety hazards. Firstly, during sliding along a retaining wall at a certain shield opening, in the unlikely event of an accidental loosening of the hexagonal prism connecting the wall member due to friction, the corresponding alarm light will go out, resulting in insufficient lit lights and triggering an alarm to prompt the operator to tighten the extinguished light. Secondly, while it is normally safe for workers to replace hooks and bends, there is a possibility of worker error, such as removing the first hook before installing the second. Therefore, if the total number of load-bearing hooks is insufficient, an alarm will be triggered, prompting the worker to immediately retighten the loosened first hook and then tighten the second hook first according to the correct procedure, preventing misoperation. Furthermore, the above solution significantly enhances safety, eliminating concerns; it overcomes the technical bias of conventional design that hesitates to make hooks detachable for fear of insecure hooks or falling from heights; and it achieves a technological breakthrough by enabling bends without lifting.

[0027] The preferred structure of the suspended platform is as follows: four square steel columns are provided at the four corners of the platform, and multiple horizontal angle steels are provided on each side of the platform. Each horizontal angle steel is welded to two square steel columns at both ends. Each horizontal angle steel has a through hole in its horizontal plate, and each longitudinal main reinforcement passes through the through hole of the corresponding horizontal angle steel and is spot welded to the wall of the through hole. In addition, each longitudinal main reinforcement is also welded to the vertical plate of the horizontal angle steel through which it passes. This ensures convenient assembly and firm connection between the longitudinal main reinforcement and each horizontal angle steel. In particular, it forms a sufficient weld length with the vertical plate of the horizontal angle steel, further improving the overall firmness of the suspended platform's hook to the corresponding wall and further enhancing the safety level of construction. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the suspended scaffolding of the shield retaining wall on the top slab of the subway station of the present invention sliding along the previous shield retaining wall.

[0029] Figure 2This is a schematic diagram of the suspended scaffolding of the shield retaining wall on the top slab of the subway station of the present invention when it turns.

[0030] The diagram shows: 1. Suspended platform; 1.1. First wall-mounted side; 1.2. Next wall-mounted side; 2. Longitudinal main reinforcement; 3. Square steel column; 4. Horizontal angle steel; 5. Footboard; 6. Auxiliary bearing; 7. Auxiliary pulley; 8. Vertical tie rod; 9. Connector; 9.1. Upper screw rod; 9.2. Lower screw rod; 9.3. Hexagonal prism; 10. First shield retaining wall; 11. First hook reinforcement; 12. Second shield retaining wall; 13. Second hook reinforcement; 14. Main bearing; 15. Main roller; 16. Ladder. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1-2 As shown, the suspended scaffolding for the shield retaining wall of the subway station roof slab of the present invention includes a rectangular suspended platform 1, with multiple longitudinal main reinforcement bars 2 on each of the four sides of the platform 1. Specifically, four square steel columns 3 are provided at the four corners of the platform 1, and multiple transverse angle steels 4 are provided on each side of the platform 1. Each transverse angle steel 4 is welded to two square steel columns 3 at both ends. Each transverse angle steel 4 has a through hole in its horizontal plate, and each longitudinal main reinforcement bar 2 passes through the through hole of the corresponding transverse angle steel 4 and is spot welded to the wall of the through hole. Each longitudinal main reinforcement bar 2 is also welded to the vertical plate of the transverse angle steel 4 through which it passes. The four transverse angle steels 4 at the lowest position of the platform 1 are welded end to end to form a bottom frame. Multiple steel grid strips are welded inside the bottom frame, and footboards 5 are placed on the steel grid strips. Each longitudinal main reinforcement bar 2 on each side of the platform 1 is also equipped with a concentric auxiliary pulley 7 via an auxiliary bearing 6. The auxiliary pulley 7 protrudes outward from the longitudinal main reinforcement bar 2 and also protrudes outward from the side of the platform 1.

[0033] To facilitate traction, vertical tie rods 8 are welded between the upper and middle horizontal angle steels 4 on each side of the suspended platform 1. The vertical tie rods 8 are connected to the rope loops or hooks of the cable, which makes it easier for the assistants to pull the suspended platform 1 outside the shield opening.

[0034] The scaffolding also includes multiple hook bars and multiple connectors 9 corresponding to each hook bar. Each longitudinal main bar 2 has a lower blind hole with internal threads at its top end; each hook bar has an upper blind hole with internal threads at its bottom end. Each connector 9 includes an upper screw 9.1 for engaging with the upper blind hole of the corresponding hook bar, a lower screw 9.2 for engaging with the lower blind hole of the corresponding longitudinal main bar 2, and a central hexagonal prism 9.3, the external threads of the two screws being opposite to each other.

[0035] All the hook bars are divided into a first hook bar 11 for hooking onto the previous shield retaining wall 10 and a second hook bar 13 for hooking onto the next shield retaining wall 12. The first hook bar 11 is connected to the longitudinal main bar 2 of the first wall-attached side 1.1 of the suspended platform 1 via a corresponding connector 9, and the second hook bar 13 can be connected to each longitudinal main bar 2 of the next wall-attached side 1.2 of the suspended platform 1 via a corresponding connector 9. Of course, in the non-turning state, the second hook bar 13 is generally placed on the footboard 5 of the suspended platform 1.

[0036] Each of the outer vertical section, middle horizontal section, and inner vertical section of the hook rib is equipped with a main roller 15 via a main bearing 14. The inner ring of the main bearing 14 is concentric with and fixed to the outer vertical section, middle horizontal section, or inner vertical section, while the outer ring of the main bearing 14 is fixed to the main roller 15.

[0037] Each longitudinal main rib 2 is equipped with an alarm device to indicate the firmness of the connection with the corresponding hook rib. Specifically, a pressure sensor is installed at the bottom of the lower blind hole of each longitudinal main rib 2, and an exposed indicator light is installed on the outside of the longitudinal main rib 2. The indicator light of the same longitudinal main rib 2 and the pressure sensor of the same longitudinal main rib 2 are connected via a signal line. When the engagement depth of the lower screw 9.2 with the lower blind hole meets the safety requirements, the bottom end of the lower screw 9.2 will press against the pressure sensor, triggering the indicator light to light up.

[0038] The suspended platform 1 is equipped with a main controller and an alarm. Each indicator light is connected to the main controller to report its status. The main controller is also connected to the alarm. Each side of the suspended platform 1 has n longitudinal main ribs 2, such as four. When the total number of lit indicator lights is less than n, the alarm sounds. The total number of lit indicator lights refers to the sum of the indicator lights lit on the first hook rib 11 and the second hook rib 13.

[0039] like Figures 1-2 As shown, the method for using the suspended scaffolding of the present invention to turn between the front shield retaining wall and the rear shield retaining wall is as follows.

[0040] a. In the initial state, each longitudinal main bar 2 of the first wall-attached side 1.1 of the suspended platform 1 is connected to a first hook bar 11. All the first hook bars 11 are hooked to the previous shield opening retaining wall 10. The operator works inside the suspended platform 1, and the assistant works on the top plate outside the shield opening and pulls the suspended platform 1 along the previous shield opening retaining wall 10 with a cable until the suspended platform 1 reaches the corner and the next wall-attached side 1.2 of the suspended platform 1 approaches the next shield opening retaining wall 12.

[0041] b. The operator holds a second hook 13 and hooks it onto the next shield opening retaining wall 12. Then, the upper screw 9.1 of a connector 9 is initially screwed into the upper blind hole of the second hook 13, and the lower screw 9.2 of the connector 9 is initially screwed into the lower blind hole of the corresponding longitudinal main rib 2 on the next side of the wall 1.2. Then, the operator continues to screw the hexagonal prism 9.3 of the connector 9 to continuously tighten the second hook 13, the connector 9, and the longitudinal main rib 2. Finally, the operator uses an Allen wrench to completely tighten the hexagonal prism 9.3 until the firmness alarm device of the longitudinal main rib 2 is triggered. At this time, the second hook 13 is firmly hooked onto the next shield opening retaining wall 12.

[0042] In this step, when the hexagonal prism 9.3 of the connector 9 is tightened with an Allen wrench to connect the second hook 13 and the corresponding longitudinal main rib 2, the indicator light of the corresponding longitudinal main rib 2 will light up, indicating that the hook rib corresponding to the connector 9 is firmly screwed into the basket 1 and firmly hooked to the corresponding shield retaining wall. Therefore, the tightening process of the hexagonal prism 9.3 of the connector 9 is stopped.

[0043] c. Repeat step b until all longitudinal main reinforcement bars 2 on the next side of the wall 1.2 are securely hooked to the next shield retaining wall 12 via the corresponding second hook reinforcement bar 13.

[0044] d. Use an Allen wrench to loosen the hexagonal prism 9.3 of the connector 9 for each longitudinal main bar 2 on the first wall side 1.1, so that the connector 9 is completely detached from the longitudinal main bar 2 below and the first hook bar 11 above. Then remove all the first hook bars 11 that are still hanging on the previous shield retaining wall 10 after being loosened, and stack them on the footboard 5 of the hanging basket 1 for use when hooking the next shield retaining wall 12.

[0045] e. The assistant worker stands on the top plate outside the shield opening and continues to drag the basket 1 so that it slides along the next shield opening retaining wall 12, while the operator stays in the basket 1 and performs wall treatment on the inner surface of the next shield opening retaining wall 12.

[0046] When the suspended platform 1 slides along any shield retaining wall, if the alarm sounds, the sliding stops, and all the hooks that are hooked to the shield retaining wall are checked. If a loose connector 9 is found, its hexagonal prism 9.3 is tightened again until the corresponding indicator light lights up and the alarm stops.

[0047] When the suspended platform 1 turns between the front and rear shield walls, if the alarm sounds, immediately stop the process of loosening the hexagonal prism 9.3 of the connector 9, and tighten the hexagonal prism 9.3 corresponding to each hook that is still in service until the number of indicator lights is greater than or equal to n, at which point the alarm will stop.

[0048] When the operator is working normally inside the suspended platform 1, if he / she needs to leave the suspended platform 1 to eat, rest, etc., the assistant will pass a ladder 16 from outside the shield opening and prop it on the footboard 5 of the suspended platform 1 so that the operator can climb out.

Claims

1. A suspended scaffold for the shield retaining wall of a subway station roof slab, comprising a rectangular suspended platform with multiple longitudinal main reinforcement bars on each of the four sides; characterized in that: The scaffold also includes multiple hook bars and multiple connectors corresponding to each hook bar; each longitudinal main bar has a lower blind hole with internal threads at its top end; each hook bar has an upper blind hole with internal threads at its bottom end; each connector includes an upper screw for engaging with the upper blind hole of the corresponding hook bar, a lower screw for engaging with the lower blind hole of the corresponding longitudinal main bar, and a central hexagonal prism, the external threads of the two screws being opposite to each other; all hook bars are divided into a first hook bar for hooking onto the previous shield wall and a second hook bar for hooking onto the next shield wall. The first hook bar is connected to the longitudinal main bar on the first wall side of the suspended platform via a corresponding connector, and the second hook bar can be connected to each longitudinal main bar on the next wall side of the suspended platform via a corresponding connector. Each hook bar has an outer vertical section, middle horizontal section and inner vertical section with a main roller on a main bearing. The inner ring of the main bearing is concentric with and fixed to the outer vertical section, middle horizontal section or inner vertical section, and the outer ring of the main bearing is fixed to the main roller. Each longitudinal main reinforcement bar is equipped with an alarm device to indicate the tightness of the connection between the longitudinal main reinforcement bar and the corresponding connector.

2. The suspended scaffolding for the shield retaining wall of the subway station roof slab according to claim 1, characterized in that: Each longitudinal main rib has a pressure sensor at the bottom of its lower blind hole, and an indicator light is located on the outside of the longitudinal main rib. The indicator light and pressure sensor of the same longitudinal main rib are connected by a signal line. When the engagement depth between the lower screw and the lower blind hole meets the safety requirements, the bottom end of the lower screw is pressed against the pressure sensor, triggering the indicator light to light up.

3. The suspended scaffolding for the shield retaining wall of the subway station roof slab according to claim 2, characterized in that: The suspended platform is equipped with a main controller and an alarm. Each indicator light is connected to the main controller, and the main controller is connected to the alarm. There are n longitudinal main ribs on each side of the suspended platform. When the number of indicator lights that are lit is less than n, the alarm will sound.

4. The suspended scaffolding for the shield retaining wall of the subway station roof slab according to claim 1, characterized in that: The suspended platform has four square steel columns at its four corners. Each side of the suspended platform has multiple horizontal angle steels. Each horizontal angle steel is welded to two square steel columns at both ends. Each horizontal angle steel has a through hole in its horizontal plate. Each longitudinal main bar passes through the through hole of the corresponding horizontal angle steel and is spot welded to the wall of the through hole. Each longitudinal main bar is also welded to the vertical plate of the horizontal angle steel through which it passes.

5. The method for using the suspended scaffolding as described in claim 1 to turn between the preceding and following shield retaining walls, characterized in that: In the initial state, each longitudinal main bar on the first wall side of the suspended platform is connected to the first hook bar. All the first hook bars are hooked to the previous shield wall. The operator works inside the suspended platform, and the assistant works on the top plate outside the shield, pulling the suspended platform forward along the previous shield wall via the cable. When the suspended platform reaches the corner, the side of the suspended platform should be close to the shield wall behind it. The operator holds a second hook bar and hooks it onto the next shield mouth retaining wall. Then, the upper screw of a connector is initially screwed into the upper blind hole of the second hook bar, and the lower screw of the connector is initially screwed into the lower blind hole of the corresponding longitudinal main bar on the side of the next wall. Then, the operator continues to screw the hexagonal prism of the connector, so that the second hook bar, the connector and the longitudinal main bar are continuously tightened. Finally, the hexagonal prism is completely tightened with an Allen wrench until the firmness alarm device of the longitudinal main bar is triggered. At this time, the second hook bar is firmly hooked onto the next shield mouth retaining wall. Repeat the above steps until all the longitudinal main bars on the side of the next wall are securely hooked to the next shield wall by the corresponding second hook bar. Use an Allen wrench to loosen the hexagonal prism connector of each longitudinal main bar on the first side of the wall, so that the connector is completely detached from the longitudinal main bar below and the first hook bar above. Then remove all the first hook bars that are still hanging on the previous shield wall after being loosened, so that they can be used to hook the next shield wall. The assistant worker stands on the top plate outside the shield opening and continues to drag the basket, making it slide along the next shield opening retaining wall, while the operator stays in the basket to perform wall treatment on the inner surface of the next shield opening retaining wall.

6. The method for using suspended scaffolding to turn between the preceding and following shield retaining walls according to claim 5, characterized in that: When using an Allen wrench to tighten the hexagonal prism connector to connect the hook reinforcement and the corresponding longitudinal main reinforcement, stop the tightening process of the hexagonal prism when the indicator light of the corresponding longitudinal main reinforcement illuminates.

7. The method for using suspended scaffolding to turn between the preceding and following shield retaining walls according to claim 5, characterized in that: When the suspended platform slides along any shield retaining wall, if the alarm sounds, stop sliding, check all the hooks that are hooked to the shield retaining wall, and tighten the hexagonal prisms of any loose connectors until the corresponding indicator light lights up. When the suspended platform turns between the front and rear shield walls, if the alarm sounds, immediately stop the process of loosening the hexagonal prisms of the connectors, and tighten the hexagonal prisms corresponding to the hooks that are still in service until the number of indicator lights is greater than or equal to n; n represents the number of longitudinal main ribs on each side of the suspended platform.

Images