Closed protective portal frame system for dynamically isolating rail-mounted area from station construction area

Abstract

The invention discloses a closed protective portal frame system for dynamically isolating a rail-mounted area from a station construction area, which is erected above a bottom plate of an underground excavation station and stretches across the rail-mounted area, and comprises a plurality of modular portal frame units arranged in parallel and a protective net covering the outer sides of the modular portal frame units, each modular portal frame unit is of a portal structure formed by stand columns, cross beams and corner supports, the bottoms of the stand columns are fixed to a station bottom plate through detachable bottom plate connecting pieces, the stand columns and the cross beams are detachably connected, the stand columns serve as formwork supporting frames for non-standard section negative second layer side wall concrete operation, and the upper surfaces of the cross beams bear station structure construction scaffolds. The adjacent portal frame units are connected through the longitudinal connecting rods to form an integral protection corridor. The rail-mounted area full-closed hard isolation and integrated protection and construction supporting functions are achieved, modular design is achieved, assembly and disassembly are rapid, dynamic construction is adapted, the safety and efficiency of cross operation are improved, the construction period is shortened, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of safety protection technology for underground engineering construction, specifically to a closed protective gantry system for dynamic isolation between the track area and the station construction area. Background Technology

[0002] In the construction of underground subway stations, it is common for tunnel boring machines (TBMs) to pass through unfinished stations for passage and launch. At this time, there are two high-risk operations inside the station: equipment passage and station structure construction, forming a three-dimensional working surface with overlapping vertical operations.

[0003] For example, Chinese invention patent application CN202311273773.2 discloses a protective isolation device and structure for an existing detachable wall in a subway track area, relating to the field of rail transit engineering technology. It includes a top plate, a bottom groove plate, mounting frames, and several sealing plates; it also includes embedded fixing plates connected to the mounting frames; mounting frames are installed near both ends of the bottom groove plate and connected to the bottom of the mounting frames; several sealing plates are arranged in parallel and connected, with each side of the sealing plates connected to two mounting frames; the bottom ends of the top plate are connected to the tops of two mounting frames. This protective isolation device covers and is installed on the outer layer of the detachable wall, dividing the subway equipment area and the track area into a protected and unprotected area, allowing the two areas to operate independently without interference. Connecting and installing multiple protective isolation devices effectively reduces the problem of heavy and inconvenient assembly and installation caused by the large size of individual protective isolation devices, thus improving construction speed.

[0004] For example, Chinese invention patent application number CN202310792592.4 discloses an isolation structure and method for cross-station construction. The isolation structure for cross-station construction includes transversely arranged horizontal steel beams and longitudinally arranged main steel beams. Its key feature is that an isolation membrane structure is provided on the horizontal and main steel beams. The lower end of the isolation membrane structure is connected to a dense safety green net, and the lower end of the dense safety green net is connected to a vertical hard isolation structure located inside the platform. Compared with existing technologies, this method allows construction to be carried out during train operation. After completion, it provides high-level isolation and safety protection, effectively isolating the construction site from the track area. This ensures that construction within the station does not interfere with train operation, improving both work efficiency and construction safety.

[0005] For example, Chinese utility model patent application number CN202221338719.2 discloses a protective canopy device for highways crossing existing railways. The protective canopy device for highways crossing existing railways is generally n-shaped, extending from the railway tunnel entrance along the railway direction, with its top at the same level as the top of the highway bridge pier. The protective canopy device for highways crossing existing railways includes a protective canopy foundation, a protective canopy body, and a protective canopy roof. The protective canopy body is formed by several vertical uprights and several horizontal crossbars fixedly connected to form a frame structure on both sides of the n-shaped opening. The bottom of the uprights is connected to the protective canopy foundation through a pipe frame support, and the top of the uprights is connected to the protective canopy roof through a pipe frame support.

[0006] Traditional protective measures often employ temporary steel pipe railings and safety nets for area separation. These measures suffer from insufficient protective strength, failing to effectively defend against falling scaffolding pipes, reinforcing bars, tools, and other objects of considerable mass from above, posing a significant threat to the safety of large, precision equipment and personnel passing below. Furthermore, they exhibit poor stability, with temporary railings lacking reliable connections to the main structure, making them easily knocked over, and unable to serve as reliable support foundations for scaffolding erection above, limiting the depth of overlapping operations. Their function is limited, merely providing simple spatial separation, unable to be organically integrated with subsequent construction processes, leading to frequent dismantling and installation, impacting overall construction efficiency. Installation is inconvenient; in the confined spaces of partially completed stations, large hoisting equipment is difficult to deploy, resulting in low efficiency in the installation and dismantling of traditional protective facilities. Based on the aforementioned technical problems of existing technologies, this invention provides a closed protective gantry system for dynamic isolation between the track area and the station construction area. Summary of the Invention

[0007] To address the aforementioned technical problems in existing technologies, this invention provides a closed protective gantry system for dynamic isolation between the track area and the station construction area. This invention not only achieves full-enclosed hard isolation of the track area, effectively preventing falling objects and personnel intrusion, but also serves as a scaffolding support platform system for the construction of the upper station structure and the non-standard cross-section second basement side wall structure, realizing the integration of protection and construction support, and features modularity, rapid installation and dismantling.

[0008] The present invention adopts the following technical solution:

[0009] A closed protective gantry system for dynamic isolation between the track area and the station construction area, erected above the underground station floor and spanning the track area, includes:

[0010] Multiple modular gantry units arranged side by side, and a protective net covering the outside of the modular gantry units;

[0011] The modular gantry unit includes two vertically arranged columns and a crossbeam connecting the tops of the two columns, as well as corner supports below the crossbeam, forming a gantry structure.

[0012] The bottom of the column is provided with a base plate connector for detachable fixing to the station base plate;

[0013] The top of the column and the lower part of the crossbeam are both provided with beam-plate connectors for installing and disassembling the column and the crossbeam;

[0014] The columns are used as formwork support systems during the construction of the non-standard cross-section second basement side wall concrete.

[0015] The upper surface of the crossbeam is configured as a support plane for supporting the scaffolding used for the construction of the station structure above;

[0016] The two adjacent modular gantry units are connected by longitudinal linkages to form a stable protective corridor.

[0017] Furthermore, the top of the crossbeam is provided with a first positioning structure at intervals along its length to limit the horizontal displacement of the scaffold upright base support, and the side of the upright is provided with a second positioning structure facing the distribution beam vertically.

[0018] Furthermore, the first positioning structure is a limiting plate or a vertical short rib welded to the top surface of the crossbeam;

[0019] The second positioning structure is a positioning angle iron welded to the side of the column, used to place the vertical distribution beam.

[0020] Furthermore, the base plate connector is a connecting plate with bolt holes, which is fixed to the station base plate by anchoring high-strength bolts;

[0021] The columns and beams, as well as the longitudinal connecting rods and modular gantry units, are all connected by high-strength bolts.

[0022] Furthermore, the enclosed protective gantry system for dynamic isolation between the track area and the station construction area also includes gantry installation lifting equipment, which includes:

[0023] The walking frame is capable of straddling and temporarily fixing itself to the crossbeam of the already installed modular gantry unit;

[0024] The lifting mechanism, located at the cantilevered front end of the traveling frame, is used to hoist the modular gantry unit assembly to be installed.

[0025] Furthermore, the walking frame includes two parallel bottom longitudinal beams, the distance between the two bottom longitudinal beams matching the longitudinal distance of the modular gantry unit, and a U-shaped buckle for engaging with the crossbeam is provided below the bottom longitudinal beam.

[0026] Furthermore, the protective net is a wire mesh with a mesh size of no more than 50mm×50mm, and is connected to the modular gantry unit by binding or hooking.

[0027] Furthermore, when the preset position of the scaffold upright is misaligned with the horizontal beam, a longitudinal distribution beam is provided on the two adjacent horizontal beams, and the scaffold upright is supported on the longitudinal distribution beam by a top support reverse buckle.

[0028] When the column is used for concrete work on the side wall of the second basement level with a non-standard cross-section, and the preset position of its horizontal support is misaligned with the column, a vertical distribution beam is set up on the two adjacent columns. The horizontal support is supported on the vertical distribution beam by a horizontal top support, or it can be temporarily reinforced by strengthening the support through horizontal cross bracing in the track area.

[0029] Furthermore, the longitudinal distribution beam and the vertical distribution beam are double-channel steel or double-I-beam steel.

[0030] Compared with the prior art, the superior effects of the present invention are as follows:

[0031] 1. The closed protective gantry system for dynamic isolation between the track area and the station construction area described in this invention adopts a fully enclosed rigid protection system composed of steel gantry and wire mesh, which can effectively resist the impact of falling objects from the construction above, and completely physically isolate the high-risk equipment passage area from the dynamic construction area above, thus solving the core safety pain point of cross-construction.

[0032] 2. The closed protective gantry system for dynamic isolation between the track area and the station construction area described in this invention uses the crossbeams of the closed protective gantry system as the scaffolding support foundation, combining temporary protective facilities with permanent construction measures into one. This not only saves materials and construction time for erecting a separate scaffolding support platform, but also significantly improves the stability and safety of the scaffolding support system through rigid connection.

[0033] 3. The closed protective gantry system for dynamic isolation between the track area and the station construction area described in this invention adopts standardized design and bolt connection for all components, which can realize factory prefabrication and rapid on-site assembly. With the help of the gantry installation lifting equipment, it can quickly form protection before the tunnel boring machine enters the site, and can be flexibly adjusted or dismantled according to the construction progress after the equipment passes, perfectly adapting to the dynamic construction needs.

[0034] 4. The closed protective gantry system for dynamic isolation between the track area and the station construction area described in this invention, through fundamental safety assurance and deep integration of processes, avoids the work stoppages and waiting that are common in cross-operations, and ensures the parallel progress of shield tunneling and station structure construction, thereby significantly shortening the total construction period and reducing the overall construction cost. Attached Figure Description

[0035] Figure 1 This is a cross-sectional schematic diagram of the application of the enclosed protective gantry system for dynamic isolation between the track area and the station construction area in a tunnel-excavated station, as described in this embodiment of the invention.

[0036] Figure 2 for Figure 1 Schematic diagram of a single modular gantry unit;

[0037] Figure 3 for Figure 1 A partial schematic diagram of the positioning structure installed at the top of the crossbeam of the enclosed protective gantry system;

[0038] Figure 4 for Figure 1 A schematic diagram showing the working status of the lifting equipment for the enclosed protective gantry system.

[0039] Figure 5 for Figure 1 A schematic diagram of the longitudinal distribution beams transferring scaffold loads;

[0040] Figure 6 for Figure 1 A schematic diagram of the vertical distribution beam transferring horizontal loads;

[0041] Figure label:

[0042] 1. Modular gantry unit; 11. Column; 111. Second positioning structure; 12. Crossbeam; 121. First positioning structure; 13. Base plate connector; 131. Beam-plate connector; 14. Longitudinal connecting rod; 15. Corner support; 2. Protective net; 3. Scaffolding; 31. Scaffolding upright; 32. Top support; 33. Bottom support; 4. Gantry installation hoist; 41. Traveling frame; 411. Bottom longitudinal beam; 412. U-shaped buckle; 42. Lifting mechanism; 5. Longitudinal distribution beam; 6. Vertical distribution beam; 7. Horizontal support; 71. Horizontal top support. Detailed Implementation

[0043] To better understand the above-mentioned objectives, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0044] Example

[0045] like Figures 1 to 2 As shown, the enclosed protective gantry system is erected above the base slab of a tunneled station and spans the track area. It is used in tunneled stations under construction where the base slab has been poured. The track area is located in the center of the base slab and will be used for the passage of tunnel boring machines (TBMs) and their associated trolleys. To protect this area, the enclosed protective gantry system is erected above it, comprising:

[0046] A modular gantry unit 1 arranged in parallel along the longitudinal direction of the track area, and a protective net 2 covering the outside of the modular gantry unit;

[0047] The modular gantry unit 1 includes two vertically arranged columns 11 made of 18# I-beams and a crossbeam 12 connecting the tops of the two columns 11. The crossbeam 12 is made of a single 18# I-beam, and a corner support 15 below the crossbeam 12, forming a gantry structure.

[0048] The bottom of the column 11 is provided with a base plate connector 13 for detachable fixing to the station base plate;

[0049] The column 11 has 200mm×200mm×20mm steel plates welded to both ends as the crossbeam 12 and the base plate connector 13. Four φ24 bolt holes are opened on it, and it is reliably fixed to the station base plate by M22 anchoring high-strength bolts. The top surface of the upper flange of the crossbeam 12 forms a wide support surface, which is directly used to support the scaffolding 3 for the construction of the station structure erected above.

[0050] The top of the column 11 and the lower part of the crossbeam 12 are both provided with beam-plate connectors 131 for installing and disassembling the column 11 and the crossbeam 12;

[0051] The column 11 is used as a formwork support system during the construction of the non-standard cross-section second basement side wall concrete.

[0052] The upper surface of the crossbeam 12 is configured as a support plane for supporting the scaffolding 3 used for the construction of the station structure above;

[0053] The modular gantry units 1 of each adjacent unit use φ48 steel pipes or angle steel as longitudinal connecting rods 14, which are connected to the columns 11 by fasteners or bolts, thus connecting the gantry structures into a whole, enhancing longitudinal stability and forming a protective corridor with extremely high overall stability. On the outside of all the modular gantry units 1, especially on the top of the modular gantry units 1 and the side facing the construction area, a protective net 2 made of steel wire with a hole diameter of 50mm×50mm and a wire diameter of not less than 2mm is hung and firmly tied with iron wire to form a fully enclosed protection.

[0054] Furthermore, the top of the crossbeam 12 is provided with a first positioning structure 121 along its length direction for limiting the horizontal displacement of the bottom support 33 of the scaffolding upright 31, and the side of the upright 11 is provided with a second positioning structure 111 facing the distribution beam vertically.

[0055] like Figure 3 As shown, at certain intervals (e.g., matching the design step distance of the scaffolding), a vertical limiting steel plate with a height of 50mm is welded on the top surface of the upper flange of the crossbeam 12 as the first positioning structure 121. When the upright 31 of the scaffolding 3 falls on the crossbeam 12, the vertical limiting steel plate can be locked on both sides of the bottom support 33 under the upright 31 to effectively prevent its lateral movement.

[0056] Furthermore, the first positioning structure 121 is a limiting plate or a vertical short rib welded to the top surface of the crossbeam 12.

[0057] The second positioning structure 111 is a positioning angle iron welded to the side of the column 11, used to place the vertical distribution beam.

[0058] Furthermore, the base plate connector 13 is a connector plate with bolt holes, which is fixed to the station base plate by anchoring high-strength bolts;

[0059] The column 11 and the crossbeam 12, as well as the longitudinal connecting rod 14 and the modular gantry unit 1, are all connected by high-strength bolts.

[0060] Furthermore, the enclosed protective gantry system for dynamic isolation between the track area and the station construction area also includes a gantry installation hoist 4, which comprises:

[0061] The walking frame 41 can straddle and be temporarily fixed to the crossbeam 12 of the installed modular gantry unit 1;

[0062] The lifting mechanism 42, located at the cantilevered front end of the walking frame 41, is used to hoist the gantry unit assembly to be installed.

[0063] The walking frame 41 includes two parallel bottom longitudinal beams 411. The distance between the two bottom longitudinal beams 411 matches the longitudinal distance between the modular gantry units 1. The bottom longitudinal beams 411 are provided with U-shaped buckles 412 for engaging with the crossbeams 12.

[0064] like Figure 4As shown, the gantry installation hoist 4 is a key tool for installing the enclosed protective gantry system used for dynamic isolation between the track area and the station construction area. The traveling frame 41 consists of two bottom longitudinal beams 411 made of 16# I-beams and cross braces connecting them. The width of the traveling frame 41 matches the spacing of the gantry system (e.g., 1.2m). The bottom of the bottom longitudinal beam 411 is equipped with U-shaped buckles 412, which are firmly fastened to the installed gantry crossbeam 12. A load-bearing crossbeam is installed at the cantilevered front end of the traveling frame 41, on which two 5T hand-operated hoists are suspended as the lifting mechanism 42. During installation, the modular gantry unit 1 assembled on the ground is hung under the hand-operated hoists. By manually pulling the gantry installation hoist 4 and operating the hand-operated hoists, the modular gantry unit 1 can be accurately positioned and fixed, which is efficient and safe.

[0065] Furthermore, the protective net 2 is a wire mesh with a mesh size of no more than 50mm×50mm, and is connected to the modular gantry unit 1 by binding or hooking.

[0066] Furthermore, when the preset position of the scaffold upright 31 is misaligned with the crossbeam 12, a longitudinal distribution beam 5 is provided on the two adjacent crossbeams 12, and the scaffold upright 31 is supported on the longitudinal distribution beam 5 by the top support 32 in the opposite direction.

[0067] When the column 11 is used for concrete work on the side wall of the second basement level with a non-standard cross-section, and the preset position of its horizontal support is misaligned with the column 11, a vertical distribution beam 6 is installed on the two adjacent columns 11. The horizontal support 7 is supported on the vertical distribution beam 6 by a horizontal top support 71. It can also be temporarily reinforced by strengthening the support through horizontal cross bracing in the track area.

[0068] like Figure 5 As shown, in certain parts of the station, such as at the lower beam, the bottom support 33 of the scaffold upright 31 of the upper scaffold 3 is designed to not fall directly on the crossbeam 12. In this case, a double-splitting 10# channel steel or I-beam is erected on the two adjacent crossbeams 12 as the longitudinal distribution beam 5. The top support 32 on the scaffold upright 31 is supported in the opposite direction on the longitudinal distribution beam 5, and the load is safely transferred to the crossbeam 12 of the enclosed protective gantry system through the longitudinal distribution beam 5.

[0069] like Figure 6As shown, during the construction of the non-standard cross-section second basement side wall structure, there is a problem that the horizontal support rod cannot be aligned with the gantry system column 11. In this case, a double-splitting 10# channel steel or I-beam is installed on the side of the column 11 as the vertical distribution beam 6. The horizontal support 7 is supported on the vertical distribution beam 6 by the horizontal top support 71. The horizontal load is transferred to the entire enclosed protective gantry system and other scaffolding systems through the vertical distribution beam 6.

[0070] Before the tunnel boring machine (TBM) enters the site, the gantry installation hoist 4 is used to quickly install the enclosed protective gantry system, forming a sturdy "protective canopy". When the TBM passes through the station, it is reliably protected above the supporting trolley behind it. At the same time, station construction personnel can safely carry out operations such as scaffolding 3 erection, rebar tying, formwork support and concrete pouring above the enclosed protective gantry system, realizing true parallel and safe controllable three-dimensional cross construction. After the tunnel excavation is completed and the relevant station structures are completed, the protective net and gantry units can be quickly dismantled and transported to the next work site for reuse.

[0071] This invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made without departing from the spirit and scope of the invention, and all such changes and modifications fall within the scope of the invention as claimed. These changes and modifications are mutually reinforcing with the inventor's invention, "A Safe Coordination Method for Cross-Construction of Shield / TBM and Cut-and-Run Stations." The scope of protection of this invention is defined by the appended claims.

Claims

1. A closed protective gantry system for dynamic isolation between the track area and the station construction area, erected above the underground station slab and spanning the track area, characterized in that, include: A modular gantry unit (1) arranged in parallel, and a protective net (2) covering the outside of the modular gantry unit; The modular gantry unit (1) includes two vertically arranged columns (11) and a crossbeam (12) connecting the tops of the two columns (11), as well as a corner support (15) below the crossbeam (12), forming a gantry structure; The bottom of the column (11) is provided with a base plate connector (13) for detachable fixing to the station base plate. The top of the column (11) and the lower part of the crossbeam (12) are provided with beam-plate connectors (131) for installing and disassembling the column (11) and the crossbeam (12). The column (11) is used as a formwork support system during the construction of the non-standard cross-section second basement side wall concrete operation; The upper surface of the crossbeam (12) is set as a support plane for supporting the scaffolding (3) used for the construction of the station structure above; The two adjacent modular gantry units (1) are connected by longitudinal connecting rods (14) to form a stable protective corridor.

2. The enclosed protective gantry system for dynamic isolation between the track area and the station construction area according to claim 1, characterized in that, The top of the crossbeam (12) is provided with a first positioning structure (121) for limiting the horizontal displacement of the scaffold upright (31) base support (33) along its length direction, and the side of the column (11) is provided with a second positioning structure (111) facing the distribution beam vertically.

3. The enclosed protective gantry system for dynamic isolation between the track area and the station construction area according to claim 2, characterized in that, The first positioning structure (121) is a limiting plate or vertical short rib welded to the top surface of the crossbeam (12); The second positioning structure (111) is a positioning angle iron welded to the side of the column (11) for placing the vertical distribution beam.

4. The enclosed protective gantry system for dynamic isolation between the track area and the station construction area according to claim 1, characterized in that, The bottom plate connector (13) is a connector plate with bolt holes, which is fixed to the station bottom plate by anchoring high-strength bolts; The column (11) and the crossbeam (12), as well as the longitudinal connecting rod (14) and the modular gantry unit (1), are all connected by high-strength bolts.

5. The enclosed protective gantry system for dynamic isolation between the track area and the station construction area according to claim 1, characterized in that, It also includes a gantry mounting hanger (4), which includes: The walking frame (41) can straddle and be temporarily fixed to the crossbeam (12) of the installed modular gantry unit (1); The lifting mechanism (42) located at the cantilevered front end of the walking frame (41) is used to hoist the gantry installation hoisting tool (4) assembly to be installed.

6. The enclosed protective gantry system for dynamic isolation between the track area and the station construction area according to claim 5, characterized in that, The walking frame (41) includes two parallel bottom longitudinal beams (411), the distance between the two bottom longitudinal beams (411) matches the longitudinal distance of the modular gantry unit (1), and a U-shaped buckle (412) for engaging with the crossbeam (12) is provided below the bottom longitudinal beams (411).

7. The enclosed protective gantry system for dynamic isolation between the track area and the station construction area according to claim 1, characterized in that, The protective net (2) is a wire mesh with a mesh size of no more than 50mm×50mm, and is connected to the modular gantry unit (1) by binding or hooking.

8. The enclosed protective gantry system for dynamic isolation between the track area and the station construction area according to claim 2, characterized in that, When the preset position of the scaffold upright (31) is misaligned with the crossbeam (12), a longitudinal distribution beam (5) is provided on the two adjacent crossbeams (12), and the scaffold upright (31) is supported on the longitudinal distribution beam (5) by a top support (32) in the opposite direction. When the column (11) is used for concrete work on the side wall of the second basement level of a non-standard cross section, and the preset position of its horizontal support is misaligned with the column (11), a vertical distribution beam (6) is set up on the two adjacent columns (11). The horizontal support (7) is supported on the vertical distribution beam (6) by a horizontal top support (71). It can also be temporarily reinforced by strengthening the support through the horizontal cross bracing of the track area.

9. The enclosed protective gantry system for dynamic isolation between the track area and the station construction area according to claim 8, characterized in that, The longitudinal distribution beam (5) and the vertical distribution beam (6) are double-channel steel or double-I-beam steel.

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