A rail device for transportation within large steel lined holes

Abstract

The utility model discloses a guide rail device for large -scale steel lining hole inner transportation, including the side guide rail subassembly of being located on the small circle arc region upstream side and downstream side horseshoe cross section steel arch frame, the main guide rail subassembly of being laid on the ground, the slide plate structure of being set to the steel lining bottom, the traction subassembly of connecting steel lining and downstream side steel arch frame, the device main function is the diversion tunnel of maximum limit adaptation already supported and is inconvenient to modify adjustment, and steel lining can transport through smoothly, not only guarantees steel lining transportation safety, still ensures the controllability of construction period. Its characterized in that: the method is simple and easy to understand, the practicality is strong, and convenient for construction, and the safety factor is high, and the creative novel can be repeatedly used, and the high generalizability.

Description

Technical Field

[0001] This utility model relates to the field of water diversion tunnel construction technology in the hydropower industry, and in particular to a guide rail device for transportation in large steel-lined tunnels. Background Technology

[0002] The support methods for excavating water diversion tunnels in hydropower stations vary depending on the geological structure of the surrounding rock. Common support cross-sections include arch-shaped, horseshoe-shaped, and circular arch-shaped sections. Based on the geometric dimensions of the excavated cross-section and the weight of the steel lining, the steel lining is typically transported inside the tunnel using the following methods: a loader towing a self-made wheeled trolley; a winch towing a self-made small trolley laid on rails for transport; or a heavy-duty forklift for transport.

[0003] In actual construction, to reduce leakage in the water diversion tunnel, a steel-lined installation scheme was adopted for the entire tunnel, with the steel lining bearing the internal water pressure independently. During the excavation phase, the water diversion tunnel primarily used horseshoe-shaped cross-section support, while unstable fault zones mainly employed small circular arch cross-section support. Therefore, when the steel lining passed through the small circular arch areas, the water-blocking ring on the outer wall of the steel lining was a considerable distance from the supporting rock wall. Conventional transportation methods were insufficient for transporting the water-blocking ring steel lining within the tunnel through the small circular arch areas. Therefore, a guide rail device for transporting large steel-lined tunnels was needed to address these issues. Summary of the Invention

[0004] The technical problem this invention aims to solve is to provide a guide rail device for transporting steel linings inside large tunnels, combining traditional and unconventional transportation methods to complete the steel lining construction and transportation tasks. Its main function is to maximize adaptability to water diversion tunnels that have already been supported and are difficult to modify or adjust, ensuring the smooth transport of the steel lining and guaranteeing both safety and project schedule control. Its characteristics include: the method is simple to understand, highly practical, easy to construct, has a high safety factor, is innovative, reusable, and has high scalability.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A guide rail device for transporting materials inside a large steel-lined tunnel includes side guide rail assemblies mounted on horseshoe-shaped cross-section steel arches on the upstream and downstream sides of a small circular arch area; a main guide rail assembly laid on the ground; a sliding plate structure mounted on the underside of the steel lining; and a traction assembly connecting the steel lining and the downstream steel arch.

[0006] Preferably, the side guide rail assembly includes columns and braces welded to the wing plates of the steel arch frame, and a guide rail beam that longitudinally connects the columns and braces.

[0007] Preferably, the main guide rail assembly includes a horizontally laid ground foundation beam and a guide rail body fixed above the ground foundation beam; the ground foundation beam is fixedly connected to the ground by anchors.

[0008] Preferably, the slide plate structure includes a horizontally arranged channel steel structure, and its wing plate is provided with a groove that matches the steel-lined water-blocking ring.

[0009] Preferably, the traction assembly includes ear plates welded to the steel arch frame, a flexible traction component connecting the ear plates and the steel lining, and a connector; the flexible traction component includes a combination structure of a hand-operated hoist and a wire rope.

[0010] Preferably, the side guide rail assembly is laid directly on the arched steel frame wing plate within the small arched area, and includes symmetrically arranged side guide rails and bottom main guide rails.

[0011] Preferably, it further includes a gravel pad layer laid on a horseshoe-shaped hole-shaped ground; the guide rail bodies of the main guide rail assembly and the side guide rail assembly are provided with a lubricating layer.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The guide rail designed for this device combines traditional and unconventional transportation methods, thus solving the transportation challenges of large-sized water-blocking ring steel liners passing through small arched cross-section areas. It is highly adaptable to water diversion tunnels that have already been supported and are difficult to modify or adjust, allowing the steel lining to pass smoothly. This not only ensures the safety of steel lining transportation but also guarantees the controllability of the construction schedule. Its key features are: the method is simple to understand, highly practical, easy to construct, has a high safety factor, is innovative, reusable, and has high scalability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the guide rail structure of this utility model; Figure 2 This is a schematic diagram of the traction component structure of this utility model; In the diagram: Upstream side 1, Downstream side 2, Small arched area 3, Side guide rail assembly 4, Column 41, Guide rail beam 42, Main guide rail assembly 5, Steel arch frame 7, Steel lining 8, Slide plate structure 9, Ear plate 10, Hand chain hoist 11, Wire rope 12. Detailed Implementation

[0014] Example 1: like Figures 1-2 As shown, a guide rail device for transporting large steel lining 8 inside a tunnel includes a side guide rail assembly 4 on a horseshoe-shaped cross-section steel arch frame 7 located on the upstream side 1 and downstream side 2 of a small circular arch area 3; a main guide rail assembly 5 laid on the ground; a sliding plate structure 9 located at the bottom of the steel lining 8; and a traction assembly connecting the steel lining 8 and the downstream side 2 steel arch frame 7.

[0015] Preferably, the side guide rail assembly 4 includes a column 41 and a diagonal brace welded to the wing plate of the steel arch frame 7, and a guide rail beam 42 that longitudinally connects the column 41 and the diagonal brace.

[0016] Preferably, the main guide rail assembly 5 includes a horizontally laid ground foundation beam and a guide rail body fixed above the ground foundation beam; the ground foundation beam is fixedly connected to the ground by anchors.

[0017] Preferably, the slide plate structure 9 includes a horizontally arranged channel steel structure, and its wing plate is provided with a groove that matches the water-blocking ring of the steel liner 8.

[0018] Preferably, the traction assembly includes a lug 10 welded to the steel arch frame 7, a flexible traction member connecting the lug 10 and the steel liner 8, and a connector; the flexible traction member includes a combination structure of a hand-operated hoist 11 and a wire rope 12.

[0019] Preferably, the side guide rail assembly 4 is laid directly on the arched steel frame wing plate within the small arched area 3, and includes symmetrically arranged side guide rails and bottom main guide rails.

[0020] Preferably, it also includes a gravel pad layer laid on a horseshoe-shaped hole-shaped ground; the guide rail bodies of the main guide rail assembly 5 and the side guide rail assembly 4 are provided with a lubricating layer.

[0021] Example 2: A guide rail device for transporting goods within a large steel lining 8-hole, and a method for transporting goods through a small arched area 3 within a large steel lining 8-hole, includes the following steps: S1, a heavy forklift is used to transport the water-blocking ring steel liner 8 to the upstream side 1 guide rail area of ​​the small arched cross section area of ​​the water diversion tunnel and unload it. S2, remove the binding device between the steel liner 8 and the heavy forklift, so that the steel liner 8 tilts to contact the side guide rail; S3, the steel liner 8 is pulled by the traction assembly to slide on the guide rail through the small arched section area; S4. After removing the traction assembly, use a heavy-duty forklift to reload the steel liner 8 and transport it to the installation station.

[0022] Preferably, the guide rail is laid in the following manner: Side guide rails are installed on the horseshoe-shaped cross-section steel arch frame 7 on the upstream side 1 and downstream side 2 of the small arch area 3: I-beams are used as columns 41 and diagonal braces and welded to the wing plates of the steel arch frame 7; I-beams are used as guide rails and longitudinally welded to the columns 41 and diagonal braces. Two channel steels are laid horizontally on the ground, with intermittently welded flanges on their contact surfaces and threaded steel anchor bars welded to the flanges on the other side. Two square steel bars are laid on the web of the channel steel as the main ground rails.

[0023] Preferably, within the small arched area 3, four square steel bars are laid directly on the arched steel frame wing plate as guide rails, with two of them located on the bottom surface of the arch as the main guide rails.

[0024] Preferably, during the heavy-duty forklift transport in step S1, gaps are left between the bottom of the forklift arm and the ground, and between the top of the water-blocking ring steel liner 8 and the rock wall.

[0025] Preferably, in step S3, channel steel is used as a sliding plate, and a groove matching the spacing of the water-blocking ring is opened on the channel steel wing plate so that the water-blocking ring can be inserted into the groove.

[0026] Preferably, the sliding plate channel steel contacts and slides with the ground main guide rail to prevent deformation of the water-blocking ring.

[0027] Preferably, in step S3, the traction assembly consists of two hand-operated hoists 11, a wire rope 12, and a plate hook, and is connected to the steel liner 8 by the ear plate 10 welded to the downstream side 2 steel arch frame 7.

[0028] Preferably, before sliding in step S3, grease is applied to the guide rail, and during sliding, a gap is left between the top of the water-blocking ring steel liner 8 and the rock wall.

[0029] Preferably, construction preparation is required before step S1: The small arched area 3 is covered with crushed stone and gravel and compacted within its upstream and downstream ranges; Clean up the exposed steel arch frame 7 wing plates and remove the shotcrete that is higher than the wing plates.

[0030] Preferably, in step S4, before the heavy forklift passes through the small arched area 3, the area needs to be temporarily backfilled to meet the driving requirements of the fixed distance between the outer edges of its left and right wheel tracks.

[0031] Example 3: The ordinary steel liner 8 can be transported using the traditional method: a heavy-duty forklift directly transports the ordinary steel liner 8 to the installation position. When crossing the small arched section area, the bottom of the arched section area should be leveled with gravel in advance, with a paving width of 3.43m, which is the distance between the outer edges of the left and right tires of the heavy-duty forklift. When the heavy-duty forklift transports the ordinary steel liner 8 through the small arched section area, the bottom of the forklift arm must be less than 150mm from the ground, and the bottom of the stiffening ring must be less than 130mm from the ground. At this time, the distance between the top of the stiffening ring of the steel liner 8 and the top of the small arched section is 33mm. It is necessary to pass through slowly and evenly under the supervision and command of safety personnel. Since the water-blocking ring steel liner 8 cannot be transported through the small arched section area by a heavy-duty forklift, it should be unloaded on the upstream side 1 of the small arched section area 3 after the heavy-duty forklift transports the water-blocking ring steel liner 8. Unconventional methods were employed, using a hand-operated hoist 11 to pull the water-blocking ring steel liner 8, which slid along a pre-laid track through the small arched cross-section area. Then, a heavy-duty forklift was used to transport the water-blocking ring steel liner 8 to the installation position. This combined traditional and unconventional transportation methods, thus solving the transportation challenge of the large-sized water-blocking ring steel liner 8 traversing the small arched cross-section area.

Claims

1. A guide rail device for transporting goods inside large steel-lined tunnels, characterized in that, The system includes side guide rail assemblies mounted on horseshoe-shaped cross-section steel arch frames on the upstream and downstream sides of the small circular arch area; main guide rail assemblies laid on the ground; a sliding plate structure mounted on the steel lining; and a traction assembly connecting the steel lining and the downstream steel arch frame. The side guide rail assemblies include columns and diagonal braces welded to the wing plates of the steel arch frame, and guide rail beams longitudinally connecting the columns and diagonal braces. The main guide rail assembly includes a horizontally laid ground foundation beam and a guide rail body fixed above the ground foundation beam. The ground foundation beam is fixedly connected to the ground by anchors. The traction assembly includes ear plates welded to the steel arch frame, a flexible traction component connecting the ear plates and the steel lining, and a connector. The flexible traction component includes a combination structure of a hand-operated hoist and a wire rope.

2. The guide rail device for transporting goods inside large steel-lined tunnels according to claim 1, characterized in that: The slide plate structure includes a horizontally arranged channel steel structure, and its wing plate is provided with a groove that matches the steel-lined water-blocking ring.

3. The guide rail device for transporting goods inside large steel-lined tunnels according to claim 1, characterized in that: The side guide rail assembly is laid directly on the arched steel frame wing plate within the small arched area, and includes symmetrically arranged side guide rails.

4. A guide rail device for transporting goods inside large steel-lined tunnels according to claim 1, characterized in that: It also includes a gravel pad layer laid on a horseshoe-shaped hole-shaped ground; the guide rail bodies of the main guide rail assembly and the side guide rail assembly are provided with a lubricating layer.

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