TBM ultra-long inclined shaft steel pipe transportation track

Abstract

The utility model discloses a TBM (Tunnel Boring Machine) super-long inclined shaft steel pipe transportation track which comprises two tracks which are parallel to each other and are arranged on an inclined shaft rock wall along the axial direction of a circular inclined shaft, each track is of a solid square steel structure, and the vertical center line of the square steel section of each track is arranged along the radial direction of the circular inclined shaft; joint bars fixed to the rails and inserted into the rock wall are arranged at intervals in the length direction of the rails; and crosspieces for connecting the two rails are arranged between the two parallel rails at intervals. The solid square steel is used as the inclined shaft steel pipe transportation track, and the problem that a conventional track and a concrete strip pier cannot be arranged on a circular tunnel formed by excavation of a shield tunneling machine is solved. The solid square steel is adopted as the track, the situation that the track is broken due to non-vertical stress in the circular tunnel can be avoided, the structure is simple, and installation is easy and convenient. Due to the fact that the space in the tunnel is small, the square steel is directly laid on the rock surface of the tunnel, the height of the rail is reduced, and meanwhile, the device better adapts to the circular structure in the tunnel.

Description

Technical Field

[0001] The utility model belongs to the technical field of water conservancy and hydropower engineering construction, in particular to the technical field of TBM inclined shaft steel pipe transportation devices and installation methods for pumped storage power stations, specifically a TBM inclined shaft steel pipe transportation track. Background Art

[0002] With the development and demand of energy storage technology, the construction scale of pumped storage power stations has been continuously expanded and the number has increased. In the construction of pumped storage power stations, inclined shafts and tunnels are usually required. In the existing construction technology, shield systems are often used to excavate inclined shafts and tunnels according to geological conditions.

[0003] Conventional inclined shaft water diversion steel pipe tunnels are "horseshoe-shaped" tunnels with a slightly wider and flat bottom, which is convenient for track layout; while the inclined shaft steel pipe tunnel excavated by the shield system has a circular cross-section. At the same time, the diameter difference between the transport steel pipe and the inclined shaft steel pipe tunnel is relatively small. Due to space limitations, the TBM inclined shaft cannot adopt conventional track layout methods. For this reason, a new track layout structure is required in combination with a suitable trolley to solve the problem of TBM ultra-long inclined shaft steel pipe transportation. Summary of the invention

[0004] The utility model discloses a TBM ultra-long inclined shaft steel pipe transportation track according to the transportation needs of the ultra-long inclined shaft tunnel excavated by the existing shield system. The utility model solves the construction technical problem that the circular cross-section space of the TBM inclined shaft is limited and conventional tracks and trolleys cannot be arranged.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A TBM ultra-long inclined shaft steel pipe transportation track, characterized in that it comprises two mutually parallel tracks arranged on the inclined shaft rock wall along the axial direction of the circular inclined shaft, each track is a solid square steel structure, and the vertical center line of the square steel cross section of each track is arranged along the radial direction of the circular inclined shaft; dowel bars fixed to the track and inserted into the rock wall are arranged at intervals along the length direction of each track; and a horizontal bar connecting the two tracks is arranged at intervals between the two mutually parallel tracks.

[0007] Furthermore, the height difference between the two mutually parallel tracks is less than 10 mm.

[0008] Furthermore, the joint positions of the two mutually parallel tracks arranged along the axial direction are staggered by at least 1 m.

[0009] Further, the dowel bars are arranged on both sides of the same section of each track, the bottom of each dowel bar is inserted into the rock wall for at least 20 cm and fixed, and the top is welded and fixed to the side of the square steel of the track, and the top of each dowel bar is 3 cm lower than the upper plane of the track.

[0010] Furthermore, a steel pad made of Q235 steel plate is arranged at the gap at the bottom of the track.

[0011] Furthermore, the crossbar is installed between two parallel rails and is welded and fixed to the side of the rails. The spacing between adjacent crossbars is 50 cm and is used to fix and support the rails.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model adopts solid square steel as the inclined shaft steel pipe transportation track to solve the problem that the circular tunnel formed by the shield machine excavation cannot be arranged with conventional tracks and concrete piers. The use of solid square steel as the track can avoid the track breaking due to non-vertical force in the circular tunnel, and the structure is simple and easy to install. Since the space in the tunnel is small, the utility model adopts square steel to be laid directly on the rock surface of the tunnel, which reduces the track height and better adapts to the circular tunnel structure.

[0014] The utility model transport track has the advantages of simple construction, low cost and high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the layout of the utility model transport track

[0016] Figure 2 It is a schematic diagram of the cross section of the transport track and trolley of the utility model;

[0017] Figure 3 It is a top view of the transport track and trolley of the utility model.

[0018] Reference numerals in the figure: 1-track, 2-rebar, 3-crossbar, 4-steel pad, 5-support beam, 6-trolley wheel, 7-support plate, 8-bracket, 9-lifting ear, 10-bottom plate. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with specific implementation methods. The specific implementation methods are further descriptions of the principles of the present invention and do not limit the present invention in any way. Technologies identical or similar to the present invention do not exceed the scope of protection of the present invention.

[0020] Combined with the attached pictures.

[0021] like Figure 2 , Figure 3 As shown, the transport track of the utility model is used for the TBM super-long inclined shaft steel pipe transport system.

[0022] Track 1 is made of 60mm×60mm solid square steel. The distance between the two tracks 1 is 2.1m, and the joint positions are staggered by at least 1m. The track span deviation must be controlled within ±5mm, and the height difference between the two tracks must be controlled within 10mm to prevent overturning during steel pipe transportation. Two dowel bars 2 are used on both sides of the same section of a single track 1 to weld and fix the track 1 to the rock surface at the bottom of the inclined shaft. The dowel bar 2 is inserted into the rock to a depth of 20cm, exposed 3cm, and spaced 50cm apart. The top of the dowel bar 2 is ensured to be 3cm lower than the top surface of the track 1 to prevent the dowel bar 2 from affecting the travel of the trolley during steel pipe transportation and causing safety accidents. A cross bar 3 is arranged every 50cm along the length of the track 1, and the cross bar 3 is made of ∠45 angle steel. The gap at the bottom of the track 1 needs to be filled with a steel pad 4 made of Q235 steel plate to support the track 1.

[0023] The steel pipe transport trolley of the TBM ultra-long inclined shaft steel pipe transport system includes a support beam 5, a bracket 8, a support plate 7, and a bottom plate 10, wherein the support beam 5 is arranged inclined toward the center of the tunnel, and two trolley wheels 6 are respectively arranged in the front and rear along the length direction of the tunnel, and the trolley wheels 6 have the same inclination angle as the support beam 5; the bracket 8 is arranged between the two support beams 5 and welded to the support beam 5 at the lower position; the bottom plate 10 is made of a patterned steel plate, which is welded to the bracket 8 to close the bottom of the trolley. The support beam 5 is installed on the bracket 8, and the top surface is set to a concave arc surface to match the shape of the steel pipe.

[0024] The support beam 5 is made of 16mm thick steel plate cut and welded, and two lifting ears 9 are welded to the front end of the support beam 5. The bracket 8 is made of 18a I-beam, which serves as the frame structure of the bottom of the trolley and is welded to the support beams 5 on both sides. The support plate 7 is made of 40mm thick steel plate, installed on the bracket 8 and welded to the support beams 5 on both sides. The bottom plate 10 is made of patterned steel plate, which closes the bottom of the trolley to facilitate the transportation of materials during the installation of steel pipes.

[0025] like Figure 1 , Figure 2 , Figure 3 As shown, track 1 is made of 60mm×60mm solid square steel. Track 1 needs to be installed close to the rock surface. The pit at the bottom of track 1 needs to be filled with steel pads 4 to avoid large gaps at the bottom of track 1 affecting the force of track 1. Steel pads 4 are Q235 steel plates, and the thickness of the steel plates is selected according to actual conditions. After track 1 is transported to the site, dowels 2 are driven into both sides of track 1 and welded to track 1. When welding, it needs to be fully welded. The top height of dowel 2 is 3cm lower than the top surface of square steel track 1 to avoid the dowels getting stuck in the wheels when the trolley is running, causing the trolley to stop suddenly or overturn. The crosspiece 3 is made of ∠45 angle steel, which is welded and fixed to the tracks 1 on both sides with a spacing of 50cm. It is used to fix and support the tracks 1 on both sides, and it is convenient for construction personnel to walk and construct when installing the tracks.

[0026] like Figure 2 , Figure 3 As shown, the transport trolley includes a pair of support beams 5, a bracket 8, a support plate 7, and a bottom plate 10. The support beam 5 is formed by cutting and welding steel plates, and two trolley wheels 6 are respectively arranged in the front and rear along the length direction of the tunnel. The trolley wheels 6 and the support beam 5 are inclined toward the center of the tunnel, and two lifting ears 9 are welded at the front ends of the two support beams 5 as hanging points for the steel wire rope when the trolley is slid in the inclined shaft.

Claims

1. A TBM ultra-long inclined shaft steel pipe transportation track, characterized by: It comprises two mutually parallel tracks which are arranged on the rock wall of the inclined shaft along the axial direction of the circular inclined shaft. Each track is a solid square steel structure. The vertical center line of the square steel section of each track is arranged along the radial direction of the circular inclined shaft. Rebars which are fixed to the track and inserted into the rock wall are arranged at intervals in the length direction of each track. A horizontal bar connecting the two tracks is arranged at intervals between the two mutually parallel tracks.

2. The TBM ultra-long inclined shaft steel pipe transportation track according to claim 1 is characterized in that: The height difference between the two parallel tracks is less than 10 mm.

3. The TBM ultra-long inclined shaft steel pipe transportation track according to claim 1 is characterized in that: The joint positions of two mutually parallel tracks arranged along the axial direction are staggered by at least 1m.

4. The TBM ultra-long inclined shaft steel pipe transportation track according to claim 1 is characterized in that: The dowel bars are arranged on both sides of the same section of each track, the bottom of each dowel bar is inserted into the rock wall for at least 20 cm and fixed, and the top is welded and fixed to the side of the square steel of the track, and the top of each dowel bar is 3 cm lower than the upper plane of the track.

5. The TBM ultra-long inclined shaft steel pipe transportation track according to claim 1 is characterized in that: A steel pad made of Q235 steel plate is arranged at the gap at the bottom of the track.

6. The TBM ultra-long inclined shaft steel pipe transportation track according to claim 1 is characterized by: The crossbar is installed between two parallel rails and is welded and fixed to the side of the rails. The spacing between adjacent crossbars is 50 cm and is used to fix and support the rails.

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