A yard structure of a TBM tunnel portal

Abstract

The utility model relates to a tunnel construction field, concretely relates to a kind of yard structure of TBM tunnel portal, it includes: platform, segment placement area, canopy, track and gantry crane.The platform is located in tunnel portal;Segment placement area is set on platform, and segment placement area is equipped with several segment brackets;Segment bracket includes bottom plate and two bosses, and the top surface of two bosses is connected with bottom plate;Canopy is set on platform, and canopy can cover segment placement area;Track is set on platform, and one end of track extends to tunnel portal;Track is arranged side by side with segment placement area;Gantry crane is set on platform, and gantry crane straddles segment placement area and track.The utility model makes that segment can be stacked in the area close to tunnel portal in advance.With the help of gantry crane, hoisting and transfer operation can be quickly completed.Compared with traditional mode, segment does not need to be transferred to rail car one by one from prefabrication yard, greatly saves transfer time, and improves the loading efficiency of segment.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction, and in particular to a storage yard structure at the entrance of a TBM tunnel. Background Technology

[0002] During TBM (Tunnel Boring Machine) tunnel construction, tunnel segments need to be transported from the tunnel entrance to the segment assembly location via a rail trolley. The traditional method is to first park the rail trolley outside the tunnel entrance, then use a forklift to move the tunnel segments from the segment prefabrication site onto the rail trolley, and then the rail trolley carries the tunnel segments into the tunnel.

[0003] However, the prefabrication yard for tunnel segments is usually far from the tunnel entrance. When using forklifts to transfer multiple sets of tunnel segments one by one to the rail trolley, a lot of waiting time is required, which makes the loading efficiency of the tunnel segments extremely low and ultimately has an adverse impact on the entire tunnel construction cycle. Utility Model Content

[0004] The purpose of this invention is to overcome the problems of long loading times and low loading efficiency of segments when transferring multiple sets of tunnel segments one by one to the track trolley in the existing technology. Therefore, this invention provides a storage yard structure for the entrance of a TBM tunnel.

[0005] This utility model provides a storage yard structure for the entrance of a TBM tunnel, including: A platform located at the tunnel entrance; A segment placement area is provided on the platform, and the segment placement area is provided with a number of segment brackets; each segment bracket includes a base plate and two protrusions, the base plate is fixedly connected to the ground of the segment placement area, the two protrusions are connected to the top surface of the base plate, and the top of the two protrusions is provided with oppositely arranged inclined surfaces; A canopy is provided on the platform and is movable along the length of the segment placement area, and is capable of covering the segment placement area. A track is provided on the platform, with one end of the track extending to the tunnel entrance; the track is arranged side by side with the segment placement area. A gantry crane is mounted on the platform and spans the segment placement area and the track.

[0006] This utility model provides a storage yard structure for a TBM tunnel entrance. The platform serves as the bearing area for the tunnel segment placement area, the canopy, the track, and the gantry crane. Located at the tunnel entrance, the platform shortens the distance between the tunnel segment placement area and the tunnel entrance, thereby reducing the material transportation distance. The tunnel segment placement area is used to stack tunnel segments, and several tunnel segment brackets within the area are used to directly place the segments, ensuring stable placement and effectively preventing segment rollover. Each tunnel segment bracket consists of a base plate and two protrusions. The base plate is connected to the ground of the tunnel segment placement area, providing stable support; the two protrusions support the outer wall of the tunnel segment. Furthermore, the tops of the two protrusions on each tunnel segment bracket have opposing inclined surfaces, a design that allows for better contact with the outer wall of the tunnel segment, enhancing support stability. The canopy is movable, allowing it to be moved over the segment placement area to cover the segments and prevent the water-swellable strips attached to the segments from getting wet, thus ensuring the quality of the segments. The track is used to mount a track trolley, which transports the segments into the tunnel. The gantry crane is used to lift the segments, raising them from the placement area and placing them onto the track trolley for transshipment.

[0007] This invention provides a storage yard structure for a TBM tunnel entrance. By arranging the segment placement area, the track, and the gantry crane on a platform located at the tunnel entrance, the segments can be pre-stacked in an area close to the tunnel entrance. When it is necessary to transfer the segments to the track trolley, the gantry crane can quickly complete the lifting and transfer operation. Compared to traditional methods, there is no need to transfer the segments one by one from the prefabrication yard to the track trolley, greatly saving transfer time and improving the loading efficiency of the segments.

[0008] Preferably, the track branches off at least two paths at the end furthest from the tunnel entrance, with each path connecting a maintenance workshop and a cement silo, respectively. In this design, the maintenance workshop's primary function is to perform inspection and maintenance work on the track trolley. The cement silo is used for cement storage. The track trolley can travel to the location of the cement silo, which is equipped with a discharge pipe. Cement from the silo can be transferred through the discharge pipe to the container on the track trolley, which then transports the cement into the tunnel.

[0009] The track can be set on the ground or embedded in the ground.

[0010] Preferably, the track is installed by embedding it into the ground. In this design, the track does not protrude from the ground, thus not obstructing the normal movement of other wheeled transport vehicles, such as trucks and forklifts, ensuring smooth and efficient traffic flow within the site.

[0011] Preferably, a pad is provided on the inclined surface of the boss, and the pad is made of nylon or rubber. In this design, because the surface of the pad has a certain roughness, when the segment is placed on the segment bracket and in contact with the pad, the pad can effectively increase the friction between the segment and the segment, thereby reducing the risk of the segment slipping off the segment bracket.

[0012] Preferably, the top surface of the pad is an arc surface, and the radius of the arc surface is adapted to the radius of the outer wall of the segment. This design, using an arc surface instead of a plane for the top surface of the pad, has significant advantages. When the segment is placed on the segment bracket, the arc surface can form a larger contact area with the outer wall of the segment, greatly increasing the contact area compared to a planar contact method. The increased contact area allows the stress at the contact point between the segment and the pad to be dispersed, effectively reducing stress concentration and thus lowering the risk of damage to the segment due to excessive local stress, improving the stability and safety of the segment placement.

[0013] Preferably, the ground of the segment placement area has a groove whose shape and size match the base plate of the segment bracket, and the segment bracket is detachably installed in the groove. In this design, the groove can accurately position and fix the segment bracket, effectively preventing horizontal displacement of the segment bracket during segment hoisting operations, thereby ensuring the stability and safety of the hoisting operation. Simultaneously, the installation design between the segment bracket and the groove allows the segment bracket to be easily removed from the groove. When the segment bracket is no longer needed, it can be quickly removed, restoring the segment placement area to a clear state and providing convenient space for other operations or material storage.

[0014] The canopy can be moved by rolling rollers on the ground, or by using a combination of rollers and guide rails.

[0015] Preferably, guide rails are provided on opposite sides of the segment placement area, and the canopy is installed on the guide rails, allowing it to move along them. In this design, the guide rails precisely define the movement path of the canopy, making its direction of movement clearer and preventing deviations or swaying. This ensures a smoother and more stable movement of the canopy, effectively improving its efficiency.

[0016] Preferably, a nighttime lighting system is provided around the platform. In this design, the nighttime lighting system is used to provide sufficient and suitable illumination for the segment placement area at night, ensuring that nighttime operations can be carried out safely, efficiently, and smoothly.

[0017] Preferably, the platform is surrounded by drainage ditches, and the drainage ditches are covered with grates. In this design, rainwater or accumulated water can flow smoothly into the drainage ditches through evenly distributed holes in the grates, and then be guided away through the predetermined path of the drainage ditches. Furthermore, the grates provide reliable support, effectively preventing people from slipping, equipment from sliding, or vehicles from veering off course and falling into the drainage ditches, thus ensuring the safety of personnel, equipment, and vehicles on site.

[0018] Preferably, the platform has a drainage slope towards the drainage ditch. In this design, the drainage slope allows water on the platform to flow quickly towards the drainage ditch and be drained away promptly, effectively preventing water accumulation on the platform.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention provides a storage yard structure for a TBM tunnel entrance. By arranging the segment placement area, the track, and the gantry crane on a platform located at the tunnel entrance, the segments can be pre-stacked in an area close to the tunnel entrance. When it is necessary to transfer the segments to the track trolley, the gantry crane can quickly complete the lifting and transfer operation. Compared to traditional methods, there is no need to transfer the segments one by one from the prefabrication yard to the track trolley, greatly saving transfer time and improving the loading efficiency of the segments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a storage yard structure at the entrance of a TBM tunnel.

[0021] Figure 2 This is a schematic diagram of a segment support.

[0022] Marked in the image: 1-Platform, 2-Segment placement area, 3-track, 301 - Parallel segment, 4-Awning, 5-Gantry crane, 501-Guide groove, 6-Repair Workshop 7-Cement silo, 8-Drainage ditch, 9-segment, 10-Segment bracket, 101-Base plate, 102-Boss, 103-Pad plate. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0024] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer" used in the description of specific embodiments of this utility model to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0026] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0027] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0028] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0029] Example 1 like Figure 1 and Figure 2 As shown, a storage yard structure at the entrance of a TBM tunnel includes a platform 1, a segment placement area 2, a canopy 4, a track 3, and a gantry crane 5.

[0030] Platform 1 is located at the tunnel entrance. Specifically, Platform 1 has a rectangular plan shape, and its length is aligned with the tunnel's axis. Platform 1 is integrally formed using a concrete pouring process, and steel mesh is pre-installed inside the concrete to enhance the structural strength of Platform 1.

[0031] The segment placement area 2 is set on the platform 1, and the segment placement area 2 is equipped with several segment brackets 10. Each segment bracket 10 includes a base plate 101 and two protrusions 102. The base plate 101 is fixedly connected to the ground of the segment placement area 2, and the two protrusions 102 are connected to the top surface of the base plate 101. The tops of the two protrusions 102 are provided with oppositely arranged slopes. Specifically, the length direction of the segment placement area 2 is consistent with the length direction of the platform 1. The segment brackets 10 can be made of engineering plastic. The spacing between the two protrusions 102 of each segment bracket 10 and the design of the slopes on the tops of the two protrusions 102 need to be determined according to the actual size of the segment 9, in order to ensure stable support for the segment 9. The width of the segment bracket 10 can be 30cm-40cm. Several segment brackets 10 can be arranged in an array in the segment placement area 2, specifically in a five-row, two-column or five-row, three-column arrangement, etc.

[0032] The canopy 4 is set on the platform 1. The canopy 4 can move along the length of the segment placement area 2 and can cover the segment placement area 2.

[0033] Track 3 is set on platform 1, with one end of track 3 extending to the tunnel entrance; track 3 is arranged side by side with segment placement area 2. Specifically, the axial direction of track 3 is consistent with the length direction of segment placement area 2.

[0034] The gantry crane 5 is mounted on the platform 1, spanning the segment placement area 2 and the track 3. Specifically, the bottom of the gantry crane 5 is provided with a guide groove 501, and the traveling wheels of the gantry crane 5 are installed in the guide groove 501. The guide groove 501 guides the movement of the gantry crane 5. The guide groove 501 is aligned with the length direction of the platform 1.

[0035] In an optional embodiment, the end of track 3 furthest from the tunnel entrance can branch off into at least two paths, with the two paths connecting the maintenance workshop 6 and the cement silo 7 respectively. Specifically, the end of track 3 extending to the tunnel entrance is a merging segment 301, which merges several of the aforementioned paths outside the tunnel entrance before continuing to extend into the tunnel. The number of paths is not fixed and can be two, three, or four.

[0036] In an optional implementation, the track 3 can be installed by embedding it into the ground. Specifically, a track groove is formed in the ground along the path of the track 3, the rail of the track 3 is installed in the track groove, and the top surface of the rail of the track 3 is flush with the ground.

[0037] In an optional embodiment, a pad 103 may be provided on the inclined surface of the boss 102. The pad 103 is made of nylon or rubber. Specifically, the thickness of the pad 103 is 20mm-30mm. The pad 103 is connected to the boss 102 by an internal hex bolt. The purpose of using the internal hex bolt as a connector is to ensure that the bolt can be completely embedded inside the pad 103 after tightening, without protruding beyond the surface of the pad 103.

[0038] In an optional embodiment, the top surface of the pad 103 can be an arc surface, the radius of which is adapted to the radius of the outer wall of the tube segment 9.

[0039] In an optional embodiment, the ground of the segment placement area 2 may be provided with a groove whose shape and size match the base plate 101 of the segment bracket 10, and the segment bracket 10 is detachably installed in the groove. Specifically, the thickness of the base plate 101 is 50mm-80mm, and the depth of the groove is 20mm-30mm.

[0040] In an optional embodiment, guide rails can be provided on opposite sides of the segment placement area 2, and the canopy 4 is mounted on the guide rails, allowing the canopy 4 to move along the guide rails. Specifically, rollers are provided at the bottom of the canopy 4, and these rollers are mounted on the guide rails, thereby enabling the canopy 4 to move. The axis of the guide rail is aligned with the length direction of the segment placement area 2. The length of the guide rail is set to twice the length of the segment placement area 2, while the length of the canopy 4 is equal to the length of the segment placement area 2. Simultaneously, one end of the segment placement area 2 in the length direction is aligned with one end of the guide rail. With this design, when the canopy 4 moves to the end of the guide rail away from the segment placement area 2, the canopy 4 will not cover the segment placement area 2; while when the canopy 4 moves to the end of the guide rail close to the segment placement area 2, it can completely cover the segment placement area 2.

[0041] In an optional embodiment, a nighttime lighting system may be installed around the platform 1. Specifically, the nighttime lighting system includes several light poles and light fixtures, with the light fixtures installed on the top of the light poles.

[0042] In an optional embodiment, a drainage ditch 8 may be provided around the platform 1, and the drainage ditch 8 may be covered with a water grate. Specifically, the cross-sectional dimensions of the drainage ditch 8 are: a depth between 20cm and 30cm, and a width between 15cm and 20cm.

[0043] In an optional embodiment, the ground of the platform 1 may be provided with a drainage slope towards the drainage ditch 8. Specifically, taking the center point of the platform 1 as the highest point, a slope is formed towards the surrounding drainage ditch 8, with the slope range set between 1% and 2%.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A storage yard structure for a TBM tunnel entrance, characterized in that, include: Platform (1), which is located at the tunnel entrance; Segment placement area (2), the segment placement area (2) is set on the platform (1), the segment placement area (2) is provided with a plurality of segment brackets (10); the segment bracket (10) includes a base plate (101) and two bosses (102), the base plate (101) is fixedly connected to the ground of the segment placement area (2), the two bosses (102) are connected to the top surface of the base plate (101), and the top of the two bosses (102) is provided with oppositely arranged inclined surfaces; A canopy (4) is provided on the platform (1). The canopy (4) can move along the length of the segment placement area (2) and can cover the segment placement area (2). Track (3), the track (3) is set on the platform (1), one end of the track (3) extends to the tunnel entrance; the track (3) is arranged side by side with the segment placement area (2); A gantry crane (5) is installed on the platform (1) and spans the segment placement area (2) and the track (3).

2. The storage yard structure at the entrance of a TBM tunnel according to claim 1, characterized in that, The track (3) branches off at least two paths at one end away from the tunnel entrance, with the two paths connecting the maintenance workshop (6) and the cement silo (7) respectively.

3. The storage yard structure at the entrance of a TBM tunnel according to claim 1, characterized in that, The track (3) is installed by embedding it into the ground.

4. The storage yard structure at the entrance of a TBM tunnel according to claim 1, characterized in that, The boss (102) has a pad (103) on its inclined surface, and the pad (103) is made of nylon or rubber.

5. The storage yard structure at the entrance of a TBM tunnel according to claim 4, characterized in that, The top surface of the pad (103) is an arc surface, and the radius of the arc surface is adapted to the radius of the outer wall of the tube segment (9).

6. A storage yard structure for a TBM tunnel entrance according to any one of claims 1-5, characterized in that, The ground of the segment placement area (2) is provided with a groove whose shape and size match the base plate (101) of the segment bracket (10), and the segment bracket (10) is installed in the groove in a detachable manner.

7. The storage yard structure at the entrance of a TBM tunnel according to claim 6, characterized in that, The segment placement area (2) is provided with guide rails on opposite sides, and the canopy (4) is installed on the guide rails and can move along the guide rails.

8. The storage yard structure at the entrance of a TBM tunnel according to claim 6, characterized in that, A nighttime lighting system is provided around the platform (1).

9. A storage yard structure for a TBM tunnel entrance according to claim 6, characterized in that, The platform (1) is surrounded by drainage ditches (8), and the drainage ditches (8) are covered with water grates.

10. A storage yard structure for a TBM tunnel entrance according to claim 9, characterized in that, The platform (1) has a drainage slope towards the drainage ditch (8).

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