Shield translation construction system for multi-section step working condition

Abstract

The utility model relates to a shield construction system under multi-section step working condition, and specifically relates to a shield translation construction system under multi-section step working condition. The utility model discloses a rail clamp is set up on the first track and is fixedly connected with the jacking jack, so that the rail clamp is used as the supporting base of the jacking jack, and the shield machine is pushed; the first bracket and the second bracket are arranged at the bottom of the shield machine shell, the first bracket is arranged on the two sides of the first track, the second bracket is arranged on the side of the two first tracks away from the center line, the wheel set capable of sliding cooperation with the first track is installed through the first bracket, the friction resistance is reduced, the risk of damaging the shield machine body due to repeated installation and removal of the wheel set is reduced, the jacking jack is arranged through the second bracket for jacking, structural interference with the wheel set support is avoided, construction conditions are provided for changing the support system at the junction of different sections with height difference, and the shield machine can adapt to the translation of different sections.

Description

Technical Field

[0001] This utility model relates to the field of shield tunneling technology, and in particular to a shield tunneling translation construction system for multi-section step conditions. Background Technology

[0002] Due to its unaffected by weather conditions and its advantages of safety, high degree of automation, and high efficiency, the shield tunneling method remains the most commonly used construction technique for subway tunnels. In traditional shield tunneling techniques, temporary tracks or sliding steel plates are often laid on the station floor to reduce frictional resistance, and reaction frames or temporary supports rigidly connected to the main station structure are used to provide jacking reaction force for the shield.

[0003] However, in the construction of mine-method tunnels, in order to adapt to complex geological conditions, control surrounding rock deformation, improve construction safety, and take into account economy and flexibility, multi-section, multi-step excavation methods (such as four-section phased construction) are often adopted. Due to the different design backfill heights of each section, an uneven longitudinal base surface is formed. The tunnel boring machine (TBM) needs to move a long distance when passing through the station in the mine-method tunnel section. Traditional reaction frames cannot meet the long-distance jacking requirements of the mine-method tunnel section, and the existing track laying cannot dynamically adapt to the backfill height differences of multiple sections. Therefore, it is necessary to design a TBM translation construction system that can adapt to long-distance translation operations under multi-section step conditions. Utility Model Content

[0004] The purpose of this invention is to provide a shield tunneling translation system for multi-section step conditions, which can adapt to long-distance translation operations under multi-section step conditions.

[0005] This utility model provides a shield tunneling translation construction system for multi-section step conditions, including a first track, a rail clamp, a jacking jack, a lifting jack, and a shield machine. The shield machine includes a shell, and the bottom of the shell is integrally provided with a first bracket, a second bracket, and a stop block. The first bracket is distributed on both sides of the shell and corresponds to the position of the first track on the corresponding side. The bottom of the first bracket is used to connect a wheel set, which can slide with the first track. The second bracket is distributed on both sides of the shell and is located on the side of the first track away from the center line on the corresponding side. The bottom surface of the second bracket is a horizontal plane. The second bracket is used for lifting by the lifting jack. The rail clamp is clamped and fixed to the first track. The rail clamp is fixedly connected to the jacking jack. The jacking jack is used to push the stop block to drive the shield machine forward.

[0006] Preferably, the rail clamp is provided with lifting lugs to facilitate transportation and rail installation.

[0007] Preferably, the present invention further includes trapezoidal grooves, which are wider at the top and narrower at the bottom. These trapezoidal grooves are respectively disposed on the base surface of different cross-sectional sections, and are adapted to the outline of the shield body. The trapezoidal grooves can accommodate the lower structure of the tunnel boring machine (TBM) and prevent structural interference between the TBM and the base surface in the corresponding cross-section.

[0008] Preferably, the trapezoidal groove includes a first trapezoidal groove, which is disposed between the two first tracks. When the first track is at a higher cross-section, the first trapezoidal groove may not have a track, saving track laying, and the tunnel boring machine can be moved to the cross-section junction by the first tracks on both sides of the first trapezoidal groove; when the first track is at a lower cross-section, a track may also be set in the first trapezoidal groove as the starting position.

[0009] Preferably, the trapezoidal groove includes a second trapezoidal groove, which is located in a cross-sectional section adjacent to the starting shaft pit. The bottom surface of the second trapezoidal groove is provided with a steel plate, and a second track is provided on the steel plate to support the translation of the tunnel boring machine.

[0010] Preferably, the end of the steel plate is welded and fixed to the launching bracket to prevent the steel plate from moving forward due to excessive friction when the tunnel boring machine moves horizontally.

[0011] Preferably, the steel plate is welded and fixed to the pre-embedded reinforcing bars.

[0012] Preferably, the present invention further includes a temporary pad, which is used to elevate and support the second corbel.

[0013] Preferably, the present invention further includes two rows of platforms, which are used to compensate for the elevation difference of different cross sections, and the two rows of platforms are respectively set to correspond to the positions of the first corbels on both sides.

[0014] Preferably, both platforms are provided with temporary tracks, and the temporary tracks extend and connect with the first track.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention provides a shield tunneling translation construction system for multi-section stepped conditions. By clamping a rail clamp on the first track and fixing the jacking jack to the rail clamp, the rail clamp serves as a support base for the jacking jack, enabling the shield machine to be pushed and adapting to long-distance translation conditions. By setting a first bracket and a second bracket at the bottom of the shield machine shell, with the first bracket corresponding to the first track on both sides and the second bracket located on the side of the first track away from the center line, it is convenient to install wheel sets that can slide with the first track through the first bracket, reducing frictional resistance and the risk of damage to the shield machine body due to repeated installation and removal of wheel sets. At the same time, it is convenient to set the jacking jack through the second bracket for lifting, avoiding structural interference with the wheel set support. This provides construction conditions for changing the support system at the junction of different sections with different elevation differences, enabling the shield machine to adapt to translation and station crossing at different sections. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a shield tunneling translation construction system under multi-section step conditions in the embodiment. Figure 2 This is a longitudinal section view of a shield tunneling translation construction system under multi-section step conditions in the embodiment; Figure 3 This is a structural layout diagram of the rail clamp and the jacking jack. Figure 4 for Figure 3 Top view; Figure 5 This is a structural diagram of a platform erected at a lower cross-section. Figure 6 A schematic diagram illustrating the process of translating and transitioning a tunnel boring machine from a higher cross-section to a lower cross-section; Figure 7 This is a schematic diagram of the tunnel boring machine supported on the second track. Figure 8 for Figure 7 Enlarged view of the structure of the second trapezoidal groove; Figure 9 This is a schematic diagram of the structure using temporary pads to elevate the second corbel. Figure 10 This is a schematic diagram illustrating the process of lowering the tunnel boring machine from a higher elevation onto the starting rail.

[0017] Marked in the image: 1-First bracket; 2-Second bracket; 3-Lifting jack; 4-Wheel set; 5-Shell; 6-Platform; 7-Stop block; 8-Push-in jack; 9-Rail clamp; 10-Lifting lug; 11-First trapezoidal groove; 12-Second trapezoidal groove; 13-First rail; 14-Second rail; 15-Steel plate; 16-Temporary pad. Detailed Implementation

[0018] 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.

[0019] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is 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 typically 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, 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.

[0020] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, 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%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0021] 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.

[0022] 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.

[0023] 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," "equipped 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.

[0024] Example like Figures 1-4 As shown, a shield tunneling translation construction system under multi-section step conditions includes a first track 13, a rail clamp 9, a jacking jack 8, a lifting jack 3, and a shield machine. The shield machine includes a shell 5. The bottom of the shell 5 is integrally provided with a first bracket 1, a second bracket 2, and a stop block 7. The first bracket 1 is distributed on both sides of the shell 5 and corresponds to the position of the first track 13 on the corresponding side. The bottom of the first bracket 1 is used to connect a wheel set 4, which can slide with the first track 13. The second bracket 2 is distributed on both sides of the shell 5 and is located on the side of the first track 13 away from the center line, that is, the second bracket 2 is located on the side of the first bracket 1 away from the center line of the shield machine. The bottom surface of the second bracket 2 is set as a horizontal plane. The second bracket 2 is used to support the lifting jack 3. The rail clamp 9 is clamped and fixed to the first track 13. The rail clamp 9 is fixedly connected to the jacking jack 8. The jacking jack 8 is used to push the stop block 7 to drive the shield machine forward.

[0025] This design uses a rail clamp 9 clamped on the first track 13 and a fixed connection between the lifting jack 3 and the rail clamp 9, making the rail clamp 9 a support base for the jacking jack 8, facilitating the jacking operation of the tunnel boring machine (TBM). After jacking a certain distance, the rail clamp 9 can be removed and reinstalled in a new position for translation in the next segment, and this process can be repeated to achieve translation under long-distance working conditions. Compared to welding the jacking jack 8 to the TBM and then setting the rail clamp 9 on the rear track, this design fixes the jacking jack 8 to the rail clamp 9 and integrates a stop block 7 at the bottom of the TBM to interact with the jacking jack 8. This reduces the space occupied by the TBM and facilitates the reuse and replacement of the lifting jack 3, resulting in better adaptability to working conditions.

[0026] Furthermore, this scheme integrates a first bracket 1 and a second bracket 2 at the bottom of the tunnel boring machine (TBM) shell 5, positioning the first bracket 1 corresponding to the location of the first track 13. After installing a wheel assembly 4 at the bottom of the first bracket 1, the wheel assembly 4 can move along the first track 13, reducing frictional resistance during translation. In this scheme, the wheel assembly 4 is connected to the TBM shell 5 via the first bracket 1, facilitating construction. When crossing different cross-sections, the wheel assembly 4 can be adjusted to adapt to different elevations by raising or removing the first bracket 1, minimizing damage to the TBM shell 5 itself. Simultaneously, by positioning the second bracket 2 on the side of the first track 13 away from the centerline and setting its bottom surface to a horizontal plane, this scheme facilitates the installation of a lifting jack 3 at its bottom. The lifting jack 3 is used to lift the second bracket 2, enabling the TBM to be raised or lowered as a whole. This provides construction conditions for changing the support system at the junction of different cross-sections with elevation differences, allowing the TBM to adapt to translational crossings at different cross-sections.

[0027] In an optional embodiment, the rail clamp 9 is provided with lifting lugs 10 to facilitate transportation and hoisting.

[0028] Furthermore, this embodiment also includes trapezoidal grooves, which are wider at the top and narrower at the bottom. These trapezoidal grooves are respectively provided on the base surface of different cross-sectional sections, and are adapted to the outline of the shield body. The trapezoidal grooves can accommodate the lower structure of the tunnel boring machine, avoiding structural interference between the tunnel boring machine and the base surface in the corresponding cross-section.

[0029] In an optional embodiment, the trapezoidal groove includes a first trapezoidal groove 11, which is located between two first tracks 13. When the first track 13 is at a higher cross-section, the first trapezoidal groove 11 may not require tracks, saving track laying, and can be moved horizontally by the first tracks 13 on both sides of the first trapezoidal groove 11. Further, the above-mentioned translational construction system also includes two rows of platforms 6, which are used to compensate for the elevation difference between different cross-sections. The two rows of platforms 6 are respectively set at the positions of the first corbels 1 on both sides. Temporary tracks are set on the two rows of platforms 6, extending and connecting the temporary tracks to the first tracks 13. By erecting the platforms 6, the tunnel boring machine can be moved horizontally from a higher cross-section along the first track 13 to a lower cross-section, realizing the crossing between high and low cross-sections. In an optional embodiment, the platform 6 is constructed from several spiral steel cylinders, and the erection length is adapted to the segment length of the temporary track.

[0030] For example, such as Figure 5 As shown, the backfill heights of sections D and G in the mining tunnel are different, resulting in a 0.35m elevation difference. When passing through the junction of the high and low sections, if... Figure 5 , Figure 6As shown, firstly, at the lower elevation section G, a 1.2m long platform 6 is erected using a 0.35m high φ325 spiral steel cylinder, making sections D and G at the same elevation. Then, the tunnel boring machine (TBM) is driven forward so that its front shield wheel assembly 4 passes through section D and stops on the steel cylinder at section G. The TBM is then lifted using jacks 3. With the support of the jacks 3, platform 6 is removed, the corbel of wheel assembly 4 (i.e., the first corbel 1) is raised by 0.35m, and a temporary track is connected. Then, the jacks 3 are retracted so that the front shield wheel assembly 4 is supported on the track at section G. The TBM is then driven forward 1.4m along the track in section G, and the platform 6 is dismantled. Except for the temporarily connected track segments, platform 6 was placed back in its original position. After the middle shield wheel assembly 4 of the tunnel boring machine (TBM) passed through section D and stopped on platform 6, the TBM was lifted as a whole using jacking jack 3. Platform 6 was then removed, the track in section G was extended and connected, and the corbel of the middle shield wheel assembly 4 was increased by 0.35m. Finally, jacking jack 3 was retracted so that both the middle shield wheel assembly 4 and the front shield wheel assembly 4 were supported on the track in section G. Then, jacking jack 8 was used to push the TBM forward and move it horizontally, enabling the TBM to pass through the station at the junction of different sections. This solved the problem of the TBM's passage being affected by the inability to connect the track in different sections.

[0031] Furthermore, in this embodiment, the shield is assembled and debugged from the starting shaft, and then moved horizontally through multiple sections of the mining method tunnel to the tunnel face for launching. To ensure that the shield does not rub against the secondary lining wall of the adjacent section during the horizontal movement of the starting bracket from the starting shaft pit, the starting bracket is placed 10cm to the right in the direction of the greater mileage of the line, and one end of the starting bracket is connected to the cut of the adjacent section. The starting bracket and the pit are reinforced with double-span H-beams of 220*220mm specification.

[0032] In optional implementations, such as Figure 7 , Figure 8 As shown, to reduce the elevation of the tunnel boring machine (TBM) in the translation section and simultaneously decrease the frictional resistance between the TBM and the base surface, a second trapezoidal groove 12 is preferably reserved in the section adjacent to the launching shaft pit. A steel plate 15 is installed on the lower bottom surface of the second trapezoidal groove 12, and a second track 14 is installed on the steel plate 15 to support the translation of the TBM. The second trapezoidal groove 12 has an upper bottom width of 3.2m, a lower bottom width of 2.4m, a height of 0.464m, a total length of 13.0m, and a steel plate 15 thickness of 2cm. The second track 14 is inclined and conforms to the arc-shaped profile of the bottom of the TBM. The ends of the steel plate 15 are preferably welded and fixed to the launching bracket, and the steel plate 15 is also welded and fixed to the pre-embedded reinforcing bars in the backfill surface to prevent the steel plate 15 from moving forward due to excessive friction during the translation of the TBM. By setting a second track 14 in the second trapezoidal groove 12 adjacent to the section of the starting shaft pit, it can be used to support the shield body pushed out from the starting bracket, which facilitates the subsequent welding of brackets and wheel sets 4 on both sides of the shield body.

[0033] When the tunnel boring machine (TBM) detaches from the launching support and is supported by the second track 14, "brackets" are welded to the front and rear sides of the TBM shell 5. During the welding of the brackets, a 200T lifting jack 3 is first installed at the bottom of the second bracket 2. After the TBM body is lifted a certain distance using the lifting jack 3, a wheel assembly 4 is welded to the bottom of the first bracket 1, extending and overlapping the first track 13 at the bottom of the wheel assembly 4. When installing the wheel assembly 4, it is connected to the first bracket 1 using a snap-fit ​​welding method. To prevent the lifting jack 3 from retracting under pressure during wheel welding, [further details are needed]. Figure 9 As shown, four temporary support cylinders 16 are fabricated to elevate the tunnel boring machine (TBM). After the wheel assembly 4 is welded to the first support 1, the temporary support cylinders 16 are retracted, and then the jacking jack 8 is used to push and move the TBM from the tail end. In this embodiment, the support jack is made of 2cm steel plate 15; the jacking jack 3 is a 200T jack with a height of 0.5m, a diameter of 0.28m, and a maximum cylinder extension of 0.45m. The jacking jack 3 can be installed separately from the second support 2 or integrated with it. The support jacks are positioned corresponding to the front and middle shield positions.

[0034] Furthermore, the aforementioned translational construction system also includes a starting position section, which is adjacent to the end of the translational section. A third trapezoidal groove is provided along the track direction in the starting position section, and starting rails are installed on the inclined surfaces on both sides of the third trapezoidal groove. Since the elevation of the tunnel boring machine (TBM) during translation is 0.64m higher than that during starting, the TBM at the higher elevation needs to be lowered to the starting rails within the third trapezoidal groove for support. Figure 10 As shown, when the tunnel boring machine (TBM) is moved to the starting position, the hydraulic cylinder of the lifting jack 3 is extended to its maximum stroke, and a 0.46m high pad is placed on it. Under the support of the lifting jack 3, the raised part of the first bracket 1 is cut off, and then the hydraulic cylinder of the lifting jack 3 is retracted. The wheel assembly 4 is then placed back on the track on both sides of the trapezoidal groove base. If necessary, the track can be raised. Then the pad above the lifting jack 3 is removed, and the second bracket 2 is lifted again using the lifting jack 3. Then the wheel assembly 4 on the TBM is cut off and the track facilities below are removed. Finally, the hydraulic cylinder of the jack is retracted, and the TBM is lowered onto the starting rail.

[0035] 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 shield tunneling translation construction system for multi-section step conditions, characterized in that, The system includes a first track (13), a rail clamp (9), a jacking jack (8), a lifting jack (3), and a tunnel boring machine (TBM). The TBM includes a housing (5). The bottom of the housing (5) is integrally provided with a first bracket (1), a second bracket (2), and a stop block (7). The first brackets (1) are distributed on both sides of the housing (5) and correspond to the positions of the first track (13) on the corresponding sides. The bottom of the first brackets (1) is used to connect to a wheel assembly (4). The wheel assembly (4) can connect to the first track (13). 3) Sliding fit, the second bracket (2) is distributed on both sides of the shell (5) and located on the side of the first track (13) away from the center line. The bottom surface of the second bracket (2) is a horizontal plane. The second bracket (2) is used for the lifting jack (3) to lift. The rail clamp (9) is clamped and fixed to the first track (13). The rail clamp (9) is fixedly connected to the jacking jack (8). The jacking jack (8) is used to push the stop block (7) to drive the tunnel boring machine forward.

2. The shield tunneling translation construction system under multi-section step conditions according to claim 1, characterized in that, The rail clamp (9) is provided with a lifting lug (10).

3. The shield tunneling translation construction system under multi-section step conditions according to claim 1, characterized in that, It also includes trapezoidal grooves, which are wider at the top and narrower at the bottom. These trapezoidal grooves are respectively provided on the base surface of different cross-sectional sections, and the trapezoidal grooves are adapted to the outline of the shield body.

4. The shield tunneling translation construction system under multi-section step conditions according to claim 3, characterized in that, The trapezoidal groove includes a first trapezoidal groove (11), which is located between the two first tracks (13).

5. The shield tunneling translation construction system under multi-section step conditions according to claim 3, characterized in that, The trapezoidal groove includes a second trapezoidal groove (12), which is located in a cross-sectional section adjacent to the foundation pit of the starting shaft. The bottom surface of the second trapezoidal groove (12) is provided with a steel plate (15), and a second track (14) is provided on the steel plate (15) to support the translation of the tunnel boring machine.

6. The shield tunneling translation construction system under multi-section step conditions according to claim 5, characterized in that, The end of the steel plate (15) is welded and fixed to the starting bracket.

7. The shield tunneling translation construction system under multi-section step conditions according to claim 5, characterized in that, The steel plate (15) is welded and fixed to the pre-embedded reinforcing bars.

8. A shield tunneling translation construction system under multi-section step conditions according to any one of claims 1-7, characterized in that, It also includes a temporary pad (16) for raising and supporting the second cow leg (2).

9. A shield tunneling translation construction system under multi-section step conditions according to any one of claims 1-7, characterized in that, It also includes two columns of platforms (6), which are used to compensate for the elevation difference of different sections. The two columns of platforms (6) are respectively set to correspond to the positions of the first corbels (1) on both sides.

10. A shield tunneling translation construction system under multi-section step conditions according to claim 9, characterized in that, Temporary tracks are provided on both platforms (6), and the temporary tracks are extended and connected to the first track (13).

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