Device for assisting double-shield TBM (Tunnel Boring Machine) connecting bridge and rear matched trolley in entering hole

Abstract

The utility model discloses a device for assisting a double-shield TBM (Tunnel Boring Machine) connecting bridge and a rear matched trolley to enter a hole, and belongs to the technical field of double-shield TBM construction. According to the device, the split type track support and the connecting bridge walking tool are arranged, so that the problem that the connecting bridge enters a hole after being assembled is solved, the connecting bridge walks on the ground through the connecting bridge walking tool, and then the split type track support is arranged; the connecting bridge walking tool is switched from the first height to the second height to achieve the effect from the connecting bridge to the split type track support, compared with an existing track laying mode, the walking tool reduces the construction cost, the connecting bridge is rapidly lifted to the split type track support through height switching, and the TBM assembling time is saved; the rear matched trolley solves the problem of height difference between the bottom pipe piece and the ground through the slope section supported by the trolley track. Compared with the prior art, the construction time for the connecting bridge and the rear matched trolley to enter the hole is shortened, and the construction cost is also reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of double-shield TBM construction, and specifically relates to a device for assisting a double-shield TBM connecting bridge and a rear matching trolley to enter a hole. Background Art

[0002] As a construction machine for rapid tunnel excavation, the double-shield TBM is widely used in mountain tunnels, water diversion projects and other industries for its safety, high efficiency and strong adaptability to different rock formations. Since the excavation section of the double-shield TBM is larger than the inner diameter of the tunnel after the segment is installed (the TBM mainframe is in the tunnel without the segment installed during excavation, while the rear supporting trolley is in the installed segment), there is a certain height difference between the bottom of the TBM mainframe and the rear supporting trolley. Whether the double-shield TBM is assembled outside or inside the tunnel, the rear supporting trolley faces the problem of not being at the same elevation as the TBM mainframe when it starts to enter the tunnel.

[0003] At present, there are two main methods to solve this problem: one is to lay the track support frame. This method mainly involves laying the gate-shaped track support frame directly from the connecting bridge area during the TBM assembly stage. The upper plane of the track support frame is at the same elevation as the track bed of the bottom segment, which can ensure that the subsequent supporting trolley can enter the hole smoothly. This method causes all the subsequent supporting trolleys to run on the paved track support frame before entering the hole, which poses a risk of the trolley overturning and tipping over, and has a large safety hazard. In addition, the installation of the track support frame is a large project and occupies the linear construction period, which is not conducive to the control of the construction period. The second is to install the bottom segment and push the hole. This method mainly involves installing the bottom segment directly from the connecting bridge area during the TBM assembly stage, and the subsequent supporting trolley is directly assembled on the bottom segment. The TBM stepping and starting are completed by installing the bottom segment and pushing it. This method cannot use the segment assembly machine to install the bottom segment during the assembly stage, and requires the use of machinery such as forklifts to cooperate with the installation, which is inefficient and occupies the linear construction period; in addition, the installation of the bottom segment and pushing the hole occupies more segments, and the cost investment is huge.

[0004] In summary, the existing method of auxiliary rear-end trolley entering the hole has the problems of long construction period and poor safety. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a device for assisting a double-shield TBM connecting bridge and a rear supporting trolley to enter a hole in view of the deficiencies in the above-mentioned prior art. The device has a novel and reasonable design, a simple structure, strong practicability, and is easy to promote and use.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A device for assisting a double-shield TBM connecting bridge and a rear supporting trolley to enter a tunnel, comprising a split track support, a trolley track support and a connecting bridge walking tooling for driving the connecting bridge to walk, wherein the split track support and the trolley track support are spliced ​​and fixed;

[0008] The split track support includes two rows of first support frames, which are arranged behind the TMB mainframe close to the tunnel face; each row of first support frames is provided with two parallel tracks in the direction of travel of the connecting bridge, the two inner tracks are used for the travel of the rear supporting trolley, and the two outer tracks are used for the travel of the connecting bridge; the height of the first support frame is consistent with the height of the bottom segment after installation;

[0009] The trolley track support includes a second support frame and two tracks arranged on the second support frame for the travel of the subsequent matching trolley, the height of the second support frame close to the split track support of at least one trolley length is consistent with the height of the first support frame, and the second support frame away from the split track support of at least three trolley lengths is arranged in a slope;

[0010] The connecting bridge walking tooling is detachably connected to the bottom surface of the connecting bridge;

[0011] The connecting bridge walking tooling includes a first height tooling for walking on the ground and a second height tooling for walking on the split track support. The height difference between the first height tooling and the second height tooling is equal to the height of the split track support. A section of the support rod of the first height tooling is removed and then transformed into the second height tooling;

[0012] The first support frame and the second support frame are both fixed on the ground by expansion bolts.

[0013] Furthermore, ground supports are provided on both sides of the trolley track support for supporting the rear matching trolley when it tilts; the height of the ground support is less than the distance between the bottom surface of the rear matching trolley and the ground, and the ground support is fixed to the ground by expansion bolts.

[0014] Furthermore, the first support frame includes oblique legs and a support plate, and the four corners of the support plate are fixedly connected with oblique legs of equal length for oblique support.

[0015] Furthermore, the first support frame is formed by sequentially connecting the first support units via connecting members.

[0016] Furthermore, the connecting piece is an 80° angle steel.

[0017] Furthermore, the track adopts 16# I-beam structure.

[0018] Furthermore, the ground support adopts 25# I-beam structure.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The device of assisting the double-shield TBM connecting bridge and the rear supporting trolley to enter the tunnel of the utility model solves the problem of the connecting bridge entering the tunnel after the assembly is completed by setting a split track support and a connecting bridge walking tooling for driving the connecting bridge to walk. The existing connecting bridge generally enters the tunnel by laying a track. This solution allows the connecting bridge to walk on the ground by setting a connecting bridge walking tooling, and then sets a section of split track support. The connecting bridge walking tooling switches from the first height to the second height to achieve the effect of the connecting bridge on the split track support. The walking tooling reduces the cost compared to laying the track. The height switching allows the connecting bridge to quickly go up to the split track support, saving the time of assembling the TBM; the rear supporting trolley solves the problem of the height difference between the bottom pipe segment and the ground through the slope section of the trolley track support. Compared with the prior art, the construction time of the connecting bridge and the rear supporting trolley entering the tunnel of the present application is shortened and the construction cost is also reduced.

[0021] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the temporary support installation structure of the sheet feeding machine in the prior art;

[0023] Figure 2 This is a schematic diagram of the installation structure of the connecting bridge walking tooling of the utility model;

[0024] Figure 3 This is a schematic diagram of the track support frame and track installation circuit of the utility model;

[0025] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at AA;

[0026] Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure at BB;

[0027] Figure 6 This is a schematic diagram of the slope track support frame and track installation circuit of the utility model;

[0028] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure at CC;

[0029] Figure 8 It is a schematic longitudinal section diagram of the trolley track support of the utility model;

[0030] Description of reference numerals:

[0031] 1. Split track support; 11. First support frame; 111. Support plate; 112. Oblique support leg; 12. Connector;

[0032] 2. Trolley track support; 21. Second support frame;

[0033] 3. First height tooling; 31. Support rod;

[0034] 4. Second height tooling; 5. Tunnel; 6. Ground support; 7. Connecting bridge;

[0035] 8. Rear supporting trolley; 9. Temporary support for film feeder. DETAILED DESCRIPTION

[0036] Embodiment of the device for assisting the double shield TBM connecting bridge and the rear supporting trolley to enter the hole:

[0037] like Figure 1 As shown, the double shield TBM (full-face tunnel boring machine) is suitable for weak and broken strata sections without groundwater that cannot stand on their own, and the segment lining is installed in the shield. The double shield system can meet the requirements of both advancement and segment installation. The steps of the double shield TBM entering the tunnel are as follows: first, the TBM main unit is sent to the tunnel face at the entrance of the tunnel 5 by using a flat stepping device, and then the assembled connecting bridge 7 and the rear matching trolley 8 are assembled in the tunnel, and then the slice feeder is temporarily fixed on the connecting bridge through a fall chain and a sling. After the slice feeder enters the tunnel 5, the slice feeder is lowered and the slice feeder temporary support 9 is installed. The slice feeder moves forward with the excavation and the slice feeder temporary support 9 is gradually removed until the slice feeder completely falls on the bottom segment. The height of the slice feeder temporary support 9 is the height from the ground of the starting cavern to the top surface of the bottom segment track bed, thereby completing the lining of the segment.

[0038] In order to connect the bridge 7 and the entry hole of the rear supporting trolley 8, as Figure 2-8 As shown, the device for assisting the TBM rear supporting trolley 8 to enter the hole includes a split track support 1, a trolley track support 2 and a connecting bridge walking tooling for driving the connecting bridge 7 to walk. The split track support 1 and the trolley track support 2 are spliced ​​and fixed.

[0039] In order to facilitate the movement of the connecting bridge 7 and the rear supporting trolley 8, the split track support 1 includes two rows of first support frames 11, and the above-mentioned first support frames 11 are arranged at the rear of the TMB main machine close to the face; each row of first support frames 11 is provided with two tracks parallel to the travel direction of the connecting bridge 7, the two inner tracks are used for the movement of the rear supporting trolley 8, and the two outer tracks are used for the movement of the connecting bridge 7; in order to ensure the smooth entry of the connecting bridge 7 and the rear supporting trolley 8 into the hole, the height of the first support frame 11 is consistent with the height of the bottom pipe segment after installation.

[0040] In order to facilitate the smooth rising of the rear-end trolley 8 from the ground to the split track support 1, the trolley track support 2 includes a second support frame 21 and two tracks arranged on the second support frame 21 for the movement of the rear-end trolley 8. The height of the second support frame 21 close to the above-mentioned split track support 1 by at least one trolley length is consistent with the height of the first support frame 11, and the second support frame 21 away from the split track support 1 by at least three trolley lengths is set in a slope; the smooth rising of the rear-end trolley 8 is achieved through the slope setting.

[0041] In order to facilitate the connection and smoothly rise from the ground to the split track support 1, the above-mentioned connecting bridge walking tooling is also detachably connected to the bottom surface of the connecting bridge 7. The connecting bridge walking tooling includes a first height tooling 3 for walking on the ground and a second height tooling 4 for walking on the split track support 1. The height difference between the above-mentioned first height tooling 3 and the second height tooling 4 is equal to the height of the split track support 1. After removing a section of the support rod 31 of the first height tooling 3, it is transformed into the second height tooling 4. That is, the first height tooling 3 saves the work of laying tracks for the connecting bridge 7 outside the tunnel, saving costs and shortening the construction period. When the connecting bridge 7 is close to the split track support 1, by removing a section of the support rod 31 of the first height tooling 3, it is transformed into the second height tooling 4, and directly goes up to the split track support 1 and continues to walk until it completely enters the bottom pipe segment.

[0042] In order to ensure the stability of the support, the first support frame 11 and the second support frame 21 are both fixed to the ground by expansion bolts.

[0043] When the rear-mounted trolley 8 moves to the slope section, the rear-mounted trolley 8 is gradually raised to prevent it from tipping over due to unbalanced weight, and ground supports 6 are installed on both sides of the trolley; specifically, ground supports 6 are also provided on both sides of the trolley track support 2 to support the rear-mounted trolley 8 when it tips over; the height of the above-mentioned ground support 6 is less than the distance between the bottom surface of the rear-mounted trolley 8 and the ground, and the ground support 6 is fixed to the ground by expansion bolts. Specifically, the ground support 6 is made of 25# I-beam, arranged longitudinally along the track support frame, and fixed to the concrete bottom plate with M20 expansion bolts; the concrete bottom plate is the ground. Preferably, the top surface of the ground support 6 is about 20㎜ away from the bottom surface of the rear-mounted trolley 8 to ensure the smooth passage of the rear-mounted trolley 8. Preferably, the ground support 6 adopts a 25# I-beam structure.

[0044] Because the split track support 1 needs to support the movement of the connecting bridge 7 and the rear supporting trolley 8, the split track support 1 has a higher stability requirement, and the first support frame 11 includes an oblique support leg 112 and a support plate 111, and the four corners of the support plate 111 are fixedly connected with an oblique support leg 112 of equal length. The arrangement of the oblique support leg 112 improves the stability of the first support frame 11, thereby improving the stability of the split track support 1.

[0045] In order to facilitate construction, the first support frame 11 is formed by sequentially connecting each first support unit through a connecting member 12. Preferably, the connecting member 12 is made of 80 angle steel. All the above-mentioned tracks are made of 16# I-beam structure.

[0046] The device solves the problem that the TBM main machine, the connecting bridge 7 and the rear supporting trolley 8 do not start at the same elevation by designing a first height tooling 3 and a second height tooling 4 for the connecting bridge 7, designing a trolley track support 2 for the rear supporting trolley 8, and designing a split track support 1 for the connecting bridge 7 and the rear supporting trolley 8.

[0047] The above is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Any simple modification, change and equivalent structural change made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A device for assisting a double-shield TBM connecting bridge and a rear supporting trolley to enter a tunnel, characterized in that: It comprises a split track support (1), a trolley track support (2) and a connecting bridge travel tooling for driving a connecting bridge (7) to travel, wherein the split track support (1) and the trolley track support (2) are spliced ​​and fixed; The split track support (1) comprises two rows of first support frames (11), wherein the first support frames (11) are arranged behind the TMB main machine close to the tunnel face; each row of first support frames (11) is provided with two tracks parallel to the travel direction of the connecting bridge (7), the two inner tracks are used for the travel of the rear matching trolley (8), and the two outer tracks are used for the travel of the connecting bridge (7); the height of the first support frames (11) is consistent with the height of the bottom pipe segment after installation; The trolley track support (2) comprises a second support frame (21) and two tracks arranged on the second support frame (21) for the travel of a subsequent trolley (8); the height of the second support frame (21) close to the split track support (1) by at least one trolley length is consistent with the height of the first support frame (11); and the second support frame (21) away from the split track support (1) by at least three trolley lengths is arranged in a slope; The connecting bridge walking tooling is detachably connected to the bottom surface of the connecting bridge (7); The connecting bridge walking tool comprises a first height tool (3) for walking on the ground and a second height tool (4) for walking on the split track support (1), the height difference between the first height tool (3) and the second height tool (4) being equal to the height of the split track support (1), and a section of the support rod (31) of the first height tool (3) is removed and then transformed into the second height tool (4); The first support frame (11) and the second support frame (21) are both fixed on the ground by expansion bolts.

2. A device for assisting a double-shield TBM connecting bridge and a rear supporting trolley to enter a tunnel according to claim 1, characterized in that: Ground supports (6) are also provided on both sides of the trolley track support (2) for supporting the rear matching trolley (8) when it is tilted; the height of the ground supports (6) is less than the distance between the bottom surface of the rear matching trolley (8) and the ground, and the ground supports (6) are fixed to the ground by expansion bolts.

3. A device for assisting a double-shield TBM connecting bridge and a rear supporting trolley to enter a tunnel according to claim 1, characterized in that: The first support frame (11) comprises oblique legs (112) and a support plate (111), and the four corners of the support plate (111) are fixedly connected with oblique legs (112) of equal length for oblique support.

4. A device for assisting a double-shield TBM connecting bridge and a rear supporting trolley to enter a tunnel according to claim 1, characterized in that: The first support frame (11) is formed by sequentially connecting the first support units via a connecting member (12).

5. A device for assisting a double-shield TBM connecting bridge and a rear supporting trolley to enter a tunnel according to claim 4, characterized in that: The connecting piece (12) is an 80° angle steel.

6. A device for assisting a double-shield TBM connecting bridge and a rear supporting trolley to enter a tunnel according to claim 1, characterized in that: The track adopts 16# I-beam structure.

7. A device for assisting a double-shield TBM connecting bridge and a rear supporting trolley to enter a tunnel according to claim 2, characterized in that: The ground support (6) adopts a 25# I-beam structure.

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