A tunnel construction method for railway transfer

Abstract

This invention discloses a tunnel construction method for railway transfer, comprising: S1, the bridge erecting machine is placed on the track; S2, the entire machine is switched to the new track; S3, the entire machine passes through the tunnel; and S4, the bridge erecting machine is removed from the track. The beneficial effects of this invention are: by properly matching the SGTJ180 bridge erecting machine with the DJ180 railway beam transport trolley, the bridge erecting machine gains track-walking capability. Utilizing the transfer station on the track, the bridge erecting machine can travel on the laid track and switch tracks for turning around. Simultaneously, by adjusting the overall machine posture through the modified railway beam transport trolley, it can safely pass through tunnels on the line. This effectively solves the problem of bridge erecting machines being unable to pass through ballastless tracks inside tunnels and the bridge erecting construction in the transition section between ballast and ballastless tracks at tunnel entrances when using tire-driven bridge erecting machines, ensuring the smooth progress of bridge erecting construction, improving work efficiency, and guaranteeing construction progress.

Description

Technical Field

[0001] This invention relates to the field of high-speed railway bridge construction technology, and in particular to a tunnel construction method for railway transfer. Background Technology

[0002] To effectively shorten the construction period, construction often adopts multiple processes simultaneously. For example, in railway line construction, box girder erection and track laying are carried out at the same time. There will be situations where after the bridge erecting machine has erected one side of the box girder, it needs to return to erect the other side of the box girder, but the track has already been laid on the line. Most existing bridge erecting machines use tire-type traveling mechanisms, such as the SGTJ180 bridge erecting machine. Obviously, the tire-type traveling mechanism cannot travel on the existing track. If a turnaround is required, a matching tire-type beam transport vehicle is used for transportation. Although it can transport the beam to the target location, the transportation route is often not the optimal route, which seriously causes delays in the construction period. Meanwhile, during the construction of railway lines, there are often many tunnels. The tunnels are already equipped with ballastless tracks and ballast-ballastless transition sections at the tunnel entrances. Existing bridge erecting machines cannot pass through these tracks. Therefore, the current method faces the challenge of bridge erection construction on ballastless tracks inside tunnels and ballast-ballastless transition sections at tunnel entrances. In addition, there are boundary requirements for passing through tunnels, and the size of bridge erecting machines often exceeds the tunnel boundaries. Especially when there are curves in the tunnel, overturning is more likely to occur. In severe cases, it can lead to the inability to carry out bridge erection work normally or even safety accidents, resulting in poor construction efficiency and affecting the construction progress.

[0003] Furthermore, for longer railway lines, transfer stations are often built on the laid tracks for the use of track-laying machines and other railway construction equipment, but their use is less common when bridge-erecting machines are erecting beams. Therefore, it is worth considering using transfer stations on the laid tracks to allow bridge-erecting machines to switch tracks and turn around. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a tunnel construction method for railway transfer, which enables the bridge erecting machine to travel on the laid track and turn around, while safely passing through tunnels on the line.

[0005] The objective of this invention is achieved through the following technical solution: a tunnel construction method for railway transfer, comprising the following steps:

[0006] S1. The bridge erecting machine is placed on the track, which includes the following sub-steps:

[0007] S101. Railway beam transport trolley in place: The bridge erecting machine retreats to the front of the track. At this time, the rear support leg of the bridge erecting machine is outside the track. Move the No. 1 railway beam transport trolley and hoist it between the rear support leg and the front support leg of the bridge erecting machine. Move the No. 2 railway beam transport trolley to the bridge erecting machine below the beam transport position corresponding to the No. 2 railway beam transport trolley. The No. 2 railway beam transport trolley moves forward on the track and enters the area below the bridge erecting machine from the rear of the bridge erecting machine. Both the No. 1 and No. 2 railway beam transport trolleys are equipped with telescopic support frames for supporting the bridge erecting machine. A transfer station for turning is built on the track. The No. 1 railway beam transport trolley can be directly transported between the rear support leg and the front support leg using wheeled transfer equipment, or it can first move to the area under the bridge erecting machine via the track, and then be hoisted between the rear support leg and the front support leg by the front or rear beam lifting trolley of the bridge erecting machine. The front and rear beam lifting trolleys are movable on the bridge erecting machine. The implementation can be carried out according to the actual situation.

[0008] S102, Rear outrigger tire travel function of bridge erecting machine: The rear and front outriggers of the bridge erecting machine work alternately (the rear and front outriggers retract alternately to make the bridge erecting machine descend smoothly) until the bridge erecting machine is placed on the No. 2 railway beam transport trolley and locked. The auxiliary outriggers of the bridge erecting machine are erected and support the bridge erecting machine. The rear outriggers of the bridge erecting machine continue to retract until the tire travel mechanism of the rear outriggers leaves the road surface, and the tire travel function of the rear outriggers is canceled. It should be noted that the tire travel mechanism can be removed from the rear outriggers and hoisted by a crane, or it can be left in place and retracted by the rear outriggers, as long as the tire mechanism does not deform on the track.

[0009] S103. The bridge erecting machine moves backward on the track: By alternately tilting the auxiliary outriggers and front outriggers towards the track while coordinating with the backward movement of the No. 2 railway beam transport trolley, the bridge erecting machine moves backward on the track until the beam transport position of the No. 1 railway beam transport trolley is on the track. Then, the overhead crane of the bridge erecting machine lifts the No. 1 railway beam transport trolley onto the track, with the No. 1 railway beam transport trolley positioned below the beam transport position of the No. 1 railway beam transport trolley. Since the front outriggers can move on the boom of the bridge erecting machine, the auxiliary outriggers, front outriggers, and the No. 2 railway beam transport trolley form a three-point movement on a straight line, i.e., the front outriggers move first, followed by the auxiliary outriggers and the No. 2 railway beam transport trolley.

[0010] S104. Remove the transverse bolster beam of the front outrigger of the bridge erecting machine: retract the front outrigger and then remove the transverse bolster beam of the front outrigger.

[0011] S105. The bridge erecting machine has the function of traveling on the track: the telescopic support frame and auxiliary legs on the No. 2 railway beam transport trolley work alternately until the bridge erecting machine is lowered onto the No. 1 railway beam transport trolley and locked. The No. 1 railway beam transport trolley and the No. 2 railway beam transport trolley are in the support state. Then the auxiliary legs are retracted. At this time, the bridge erecting machine has the function of traveling on the track.

[0012] S2. Machine reversing: The entire machine reverses along the track into the transfer station, realizing the reversing and turning of the bridge erecting machine;

[0013] S3, Machine passing through tunnel: The machine travels forward along the track and passes through the tunnel. When passing through the tunnel, the No. 1 railway beam transport trolley and the No. 2 railway beam transport trolley are used to adjust the tunnel boundary so that the machine can pass through the tunnel safely.

[0014] S4. Lowering the bridge erecting machine onto the track, which includes the following sub-steps:

[0015] S401. Install the front support leg bolster beam and erect the front support leg: Move the whole machine forward until the front support leg of the bridge erecting machine moves out of the track, install the transverse bolster beam, and erect the front support leg on the road surface outside the track. The telescopic support frame of the No. 1 railway beam transport trolley is lowered until the support state of the No. 1 railway beam transport trolley is released.

[0016] S402, Erection of auxiliary outriggers of bridge erecting machine: The No. 2 railway beam transport trolley drives the bridge erecting machine to move forward, the auxiliary outriggers are erected and the front outriggers are retracted, and the No. 1 railway beam transport trolley is lifted by the overhead crane.

[0017] S403. The bridge erecting machine resumes tire travel function: The No. 2 railway beam transport trolley continues to drive the bridge erecting machine forward until the rear outrigger moves out of the track. The front outrigger is erected and the auxiliary outrigger is retracted. Then the rear outrigger is erected until the tire travel mechanism of the rear outrigger contacts the road surface. The telescopic support frame of the No. 2 railway beam transport trolley is lowered until the support state of the No. 2 railway beam transport trolley is released. At this time, the bridge erecting machine resumes tire travel function. The No. 2 railway beam transport trolley exits the bridge erecting machine along the track and moves out of the No. 1 railway beam transport trolley at the same time.

[0018] In step S102, after the rear outriggers of the bridge erecting machine have completed their tire-free travel function, the horizontality of the bridge erecting machine's boom is adjusted using the No. 2 railway beam transport trolley and auxiliary outriggers. The horizontality of the bridge erecting machine's boom shall not exceed 7‰.

[0019] The bridge erecting machine is equipped with a beam transport interface for transfer at the beam transport position. The support positions of the bridge erecting machine on the No. 1 railway beam transport trolley and the No. 2 railway beam transport trolley are the same as the support positions of the bridge erecting machine on the highway beam transport vehicle. The principle is the same as that of the highway beam transport vehicle for transferring the bridge erecting machine, which will not be elaborated here.

[0020] This application utilizes existing transfer stations on operational railway lines for turning around. Preferably, the transfer station uses a double-track to four-track turnout; it should be noted that a four-track to eight-track turnout can also achieve track switching and turning around for the bridge erecting machine. In this application, any existing method that enables the bridge erecting machine to switch tracks and turn around can be directly adopted.

[0021] The telescopic support frame 7 consists of a base, support columns, support plates, and a drive cylinder assembly. The base is mounted on a railway beam-carrying trolley, the support columns are fixed to the base, and the support plates are slidably mounted on the support columns and driven to move on the support columns by the drive cylinder assembly. The support plates support the bridge erecting machine during transport. The drive cylinder assembly consists of cylinders symmetrically arranged on both sides of the support columns. The height of the No. 1 and No. 2 railway beam-carrying trolleys, plus the base, is the same as the height of the road beam-carrying vehicle matched with the bridge erecting machine. Taking the SGTJ180 bridge erecting machine as an example, the overall height of the SGTJ180 bridge erecting machine is 6850mm when transporting through tunnels, and the height from the lower plane of the boom to the bottom of the rear outrigger tires is 4350mm. The existing road beam-carrying vehicle matched with it has a height of 1100mm and a boom height of 3390mm. During transport, the lower plane of the bridge erecting machine's boom is 4490mm from the ground, and the bridge erecting machine is 140mm off the ground. The railway beam-carrying trolley in this application has a height of 840mm, and the total height of the support columns and support plates is 3390mm. During transport, the lower plane of the bridge erecting machine's boom is 4230mm from the ground, and the bridge erecting machine's ground clearance is -120mm, which does not meet the requirements. Therefore, a 250mm base needs to be added to ensure it is at the same height as the road beam-carrying vehicle, further expanding the applicability of the railway beam-carrying trolley. Both the No. 1 and No. 2 railway beam-carrying trolleys are wheel-rail type beam-carrying vehicles. Preferably, the No. 1 and No. 2 railway beam-carrying trolleys are DJ180 railway beam-carrying vehicles. The structural form of the base, support columns, and support plates can be adjusted according to actual conditions to meet basic functional requirements.

[0022] In step S3, when passing through the curved section inside the tunnel, the attitude of the bridge erecting machine is adjusted by the drive cylinder group.

[0023] In order to meet the construction requirements of two-sided construction, the box girder erection and track laying can be carried out simultaneously. After the track laying is completed, the bridge erecting machine can directly drive to the other side for erection after erecting the box girder on one side. Therefore, the transfer station on the laid track is used to realize the turning around of the bridge erecting machine, realizing the bridge erecting machine from tire travel to the whole machine (the bridge erecting machine is carried by the beam transport trolley) track travel.

[0024] The beneficial effects of this invention are as follows: By properly matching the SGTJ180 bridge erecting machine with the DJ180 railway beam transport trolley, the bridge erecting machine is equipped with track walking capability. Utilizing the transfer station on the track, the bridge erecting machine can travel on the laid track and change tracks. At the same time, by adjusting the overall posture of the machine through the modified railway beam transport trolley, it can safely pass through tunnels on the line. This effectively solves the problem that the bridge erecting machine's tires cannot travel through ballastless tracks in tunnels and the problem of beam erection construction in the transition section between ballast and ballastless tracks at tunnel entrances. This ensures the smooth progress of beam erection construction, improves work efficiency, and guarantees the construction schedule.

[0025] Instruction manual illustrations

[0026] Figure 1 This is a flowchart illustrating the construction process of the present invention.

[0027] Figure 2 This is a schematic diagram showing the railway beam-carrying trolley in place before the bridge erecting machine of the present invention is mounted on the track;

[0028] Figure 3 This is a schematic diagram of the bridge erecting machine after the tire traveling mechanism has been removed from the upper track of the bridge erecting machine according to the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the bridge erecting machine lifting trolley for railway beam transport and the tire running mechanism in front of the upper track of the bridge erecting machine of the present invention.

[0030] Figure 5 This is a schematic diagram showing the No. 1 railway beam transport trolley being hoisted onto the track by the bridge erecting machine of the present invention;

[0031] Figure 6 This is a schematic diagram of the entire frame of the present invention running on the track after it is mounted on the track;

[0032] Figure 7 This is a diagram showing the layout of the turnouts in the transfer station of this invention;

[0033] Figure 8 This is a schematic diagram showing the unsupported state of the No. 1 railway beam transport trolley before the lower track of the bridge erecting machine according to the present invention;

[0034] Figure 9 This is a schematic diagram showing the lifting and forward movement of the No. 1 railway beam transport trolley in front of the lower track of the bridge erecting machine of the present invention;

[0035] Figure 10 This is a schematic diagram of the bridge erecting machine after it has been lowered onto the track according to the present invention;

[0036] Figure 11 This is a schematic diagram of the state of the linear track through the tunnel for the entire machine of the present invention;

[0037] Figure 12 This is a schematic diagram of the state of the entire machine passing through the tunnel curve track of the present invention (schematic diagram of the telescopic support frame).

[0038] In the diagram, 1-bridge erecting machine, 2-track, 3-1# railway beam transport trolley, 4-2# railway beam transport trolley, 5-front outrigger, 6-rear outrigger, 7-telescopic support frame, 8-auxiliary outrigger, 9-tire traveling mechanism, 10-crane crane, 701-base, 702-support column, 703-support plate, 704-cylinder. Detailed Implementation

[0039] The technical solution of the present invention will be further described in detail below with reference to the embodiments, but the scope of protection of the present invention is not limited to the following description.

[0040] like Figure 1 As shown, a tunnel construction method for railway transfer includes the following steps:

[0041] S1. The bridge erecting machine is placed on the track, which includes the following sub-steps:

[0042] S101, the railway beam-carrying trolley has arrived: (as follows) Figure 2 As shown, the bridge erecting machine 1 retreats to the front of track 2. At this time, the rear support leg 6 of the bridge erecting machine 1 is located outside track 2. The No. 1 railway beam transport trolley 3 is moved and hoisted between the rear support leg 6 and the front support leg 5 of the bridge erecting machine 1 (as close as possible to the rear support leg 6). The No. 2 railway beam transport trolley 4 is moved to the position below the beam transport position of the bridge erecting machine 1 corresponding to the No. 2 railway beam transport trolley 4. The No. 2 railway beam transport trolley 4 moves forward on track 2 and enters the area below the bridge erecting machine 1 from the rear. Both the No. 1 railway beam transport trolley 3 and the No. 2 railway beam transport trolley 4 are equipped with telescopic support frames 7 for supporting the bridge erecting machine 1. A transfer station for turning is built on track 2. The No. 2 railway beam transport trolley 4 is placed 3.5m away from the rear support leg 6 (that is, this is the beam transport position of the bridge erecting machine 1).

[0043] S102, Bridge erecting machine rear outriggers 6 with tire-free travel function: such as Figure 3 As shown, the rear outrigger 6 and front outrigger 5 of the bridge erecting machine 1 work alternately until the bridge erecting machine 1 is lowered onto the No. 2 railway beam transport trolley 4 and locked. The rear outrigger 6 drops a maximum of 2200mm, and the front outrigger 5 drops within the range of 1900mm-2100mm. The auxiliary outrigger 8 of the bridge erecting machine 1 is erected and supports the bridge erecting machine 1. The rear outrigger 6 of the bridge erecting machine 1 continues to retract until the tire traveling mechanism 9 of the rear outrigger 6 leaves the road surface, thus canceling the tire traveling function of the rear outrigger 6. After the tire traveling function of the rear outrigger 6 of the bridge erecting machine 1 is canceled, the horizontality of the boom of the bridge erecting machine 1 is adjusted to 7‰ by the No. 2 railway beam transport trolley 4 and the auxiliary outrigger 8.

[0044] S103, Bridge erecting machine 1 moves backward on track 2: (e.g.) Figures 4-5As shown, by alternating the lifting operations of the auxiliary outriggers 8 and the front outriggers 5 towards the track 2, while coordinating with the backward movement of the No. 2 railway beam transport trolley 4, the bridge erecting machine 1 moves backward on the track 2 until the beam transport position of the bridge erecting machine 1 corresponding to the No. 1 railway beam transport trolley 3 is located on the track 2. Then, the overhead crane 10 of the bridge erecting machine 1 lifts the No. 1 railway beam transport trolley 3 onto the track 2. At the same time, the No. 1 railway beam transport trolley 3 is located below the beam transport position of the bridge erecting machine 1 corresponding to the No. 1 railway beam transport trolley 4. The distance between the No. 1 railway beam transport trolley 3 and the No. 2 railway beam transport trolley 4 is 37.9m (this distance is also the distance between the two beam transport positions on the bridge erecting machine 1). The height of the No. 1 railway beam transport trolley 3 and the No. 2 railway beam transport trolley 4 plus the base is the same as the height of the highway beam transport vehicle matched with the bridge erecting machine 1. Both the No. 1 railway beam transport trolley 3 and the No. 2 railway beam transport trolley 4 are wheel-rail type beam transport vehicles. In this embodiment, the No. 1 railway beam transport trolley 3 and the No. 2 railway beam transport trolley 4 adopt the DJ180 railway beam transport vehicle. The bridge erecting machine 1 is equipped with two overhead cranes 10. If the tire traveling mechanism 9 is removed, the tire traveling mechanism 9 can be lifted by another overhead crane 10 (the two overhead cranes do not interfere with each other. In this embodiment, the tire traveling mechanism is removed and lifted by the overhead crane 10).

[0045] S104. Remove the transverse bolster beam of the front support leg 5 of the bridge erecting machine: retract the front support leg 5 and then remove the transverse bolster beam of the front support leg 5.

[0046] S105. The bridge erecting machine has the function of traveling on track 2: As shown in 6, the telescopic support frame 7 and auxiliary support leg 8 on the No. 2 railway beam transport trolley 4 work alternately until the bridge erecting machine 1 falls onto the No. 1 railway beam transport trolley 3 and locks it. The No. 1 railway beam transport trolley 3 and the No. 2 railway beam transport trolley 4 are in the support state. Then the auxiliary support leg 8 is retracted. At this time, the bridge erecting machine 1 has the function of traveling on track 2.

[0047] S2, Complete machine conversion line: such as Figure 7 As shown, the entire machine reverses along track 2 into the transfer station, realizing the rerouting and turning of the transfer bridge erecting machine 1;

[0048] S3, Machine passing through tunnel: The machine travels forward along track 2 to pass through the tunnel. When passing through the tunnel, the tunnel boundary is adjusted by the No. 1 railway beam transport trolley 3 and the No. 2 railway beam transport trolley 4 to ensure the machine passes through the tunnel safely.

[0049] S4, Lower track 2 of the bridge erecting machine, includes the following sub-steps:

[0050] S401, such as Figure 8As shown, the front support leg 5 is installed and the front support leg 5 is erected: the whole machine moves forward until the front support leg 5 of the bridge erecting machine 1 moves out of the track 2, the transverse bolster is installed, the front support leg 5 is erected on the road surface outside the track 2, the telescopic support frame 7 of the No. 1 railway beam transport trolley 3 is lowered until the support state of the No. 1 railway beam transport trolley 3 is released; at the same time, the tire traveling mechanism 9 is placed on the road surface by the overhead crane 10.

[0051] S402, Bridge erecting machine auxiliary outriggers 8 supports: such as Figure 9 As shown, the No. 2 railway beam transport trolley 4 drives the bridge erecting machine 1 to move forward, the auxiliary support leg 8 is erected and the front support leg 5 is retracted, and the No. 1 railway beam transport trolley 3 is lifted by the crane 10.

[0052] S403, Bridge erecting machine restores tire travel function: such as Figure 10 As shown, the No. 2 railway beam transport trolley 4 continues to drive the bridge erecting machine 1 forward until the rear outrigger 6 moves out of track 2. The front outrigger 5 is erected and the auxiliary outrigger 8 is retracted. The tire traveling mechanism 9 is installed on the rear outrigger 6. The rear outrigger 6 is erected until the tire traveling mechanism 9 of the rear outrigger 6 contacts the road surface (if the tire traveling mechanism 9 is not disassembled, the outrigger 6 is erected directly until the tire traveling mechanism 9 of the rear outrigger 6 contacts the road surface). The telescopic support frame 7 of the No. 2 railway beam transport trolley 4 is lowered until the support state of the No. 2 railway beam transport trolley 4 is released. At this time, the bridge erecting machine 1 resumes its tire traveling function. The No. 2 railway beam transport trolley 4 exits the bridge erecting machine 1 along track 2 and moves out of the No. 1 railway beam transport trolley 3. At this time, the bridge erecting machine has entered the normal erection operation. The bridge erecting machine 1 is raised to the highest position for normal erection or a lateral movement device is added to move it laterally to other lines to be erected.

[0053] The bridge erecting machine is equipped with a beam transport interface for transferring beams.

[0054] The transfer station uses a double-track to four-track turnout.

[0055] When crossing a tunnel, the clearance of the bridge erecting machine 1 needs to be verified. In this embodiment, the overall height of the bridge erecting machine 1 when carrying it through the tunnel is 6850mm, the minimum distance from the tunnel lining is 515mm, and after removing the transverse bolster beam of the front support leg 5 and the traveling mechanism of the rear support leg 6, the vertical height to the cable trough in the drainage ditch is 190mm, which meets the carrying conditions for crossing the tunnel.

[0056] like Figure 12 As shown, when there is a curved section in the tunnel, it is necessary to verify the crossing clearance of the bridge erecting machine 1. In this embodiment, as... Figure 11As shown, due to the presence of a reverse curve within the tunnel, with a superelevation h1=40mm towards the tunnel wall, the total height of bridge erecting machine 1 when passing through the tunnel is h=6850mm, the track gauge is s=1435mm, and the offset of bridge erecting machine 1 is n=h*(h1 / s)=6850*40 / 1435=190.9mm. After the offset, the shortest distance from the tunnel wall is 240mm, and the vertical height to the cable trough in the drainage ditch is 120mm, which meets the transport conditions of the curved section within the tunnel.

[0057] In addition, calculations are needed to assess the risk of tipping over during transport, including:

[0058] 1) Lateral inertial force

[0059] =3.24 x 85 = 275.4 (kN)

[0060] In the formula, n0 represents the lateral inertial force per ton of cargo, in kN / t.

[0061] Q – Weight of goods, in tons (t).

[0062] =2.82+2.2X229 / 1200=3.24(kN / t)

[0063] Where a is the distance (mm) from the center of gravity of the cargo to the transverse center line of the vehicle.

[0064] l — Center distance of bogies for heavy-duty vehicles (center distance of the underframe center plate for freight cars with multi-layer bogie groups), mm.

[0065] = sin2°11′14″ x 6000 = 229 (Center of gravity height is 6m when transporting)

[0066] 2) Wind power

[0067] W=qF =0.49×160=78.4(kN) (5.3.4-4)

[0068] In the formula, q represents the lateral wind pressure; when the windward surface is a plane, q = 0.49 kN / m2; when the windward surface is the side of a sphere or cylinder, q = 0.245 kN / m2.

[0069] F – Projected area of ​​the side facing the wind, m2.

[0070] 3) Stability coefficient of cargo overturning

[0071] In the horizontal direction: = = =2.39

[0072] In the formula, Q represents the weight of the goods, in tons.

[0073] b—the distance between the longitudinal vertical plane where the cargo's center of gravity is located and the point where the cargo overturns, in mm;

[0074] T – longitudinal inertial force of the cargo, kN;

[0075] N—lateral inertial force of the cargo, kN;

[0076] h—Height of the cargo's center of gravity from the horizontal plane where the tipping point is located, in mm;

[0077] W – Wind force acting on the cargo, kN;

[0078] h_wind — the height of the point of application of the resultant wind force from the horizontal plane where the overturning point is located, in mm.

[0079] When the overturning stability coefficient is less than 1.25, reinforcement measures are required. The parameters for anti-overturning during transport in this embodiment are all within the design requirements and meet the transport conditions.

[0080] The telescopic support frame 7 consists of a base 701, a support column 702, a support plate 703, and a drive cylinder assembly. The base 701 is mounted on a railway beam-carrying trolley, the support column 702 is fixed to the base 701, and the support plate 703 is slidably mounted on the support column 702 and driven to move on the support column 702 by the drive cylinder assembly. The support plate 703 supports the bridge erecting machine 1 during transport. The drive cylinder assembly consists of cylinders 704 symmetrically arranged on both sides of the support column. In step S3, when passing through a curved section in the tunnel, the attitude of the bridge erecting machine 1 is adjusted synchronously or asynchronously by the drive cylinder assembly.

[0081] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A tunnel construction method for railway transfer, characterized in that, Includes the following steps: S1. The bridge erecting machine is placed on the track, which includes the following sub-steps: S101, Railway beam transport trolley in place: The bridge erecting machine retreats to the front of the track. At this time, the rear outrigger of the bridge erecting machine is outside the track. Move the No. 1 railway beam transport trolley and hoist it between the rear outrigger and the front outrigger of the bridge erecting machine. Move the No. 2 railway beam transport trolley to the bridge erecting machine below the beam transport position corresponding to the No. 2 railway beam transport trolley. The No. 2 railway beam transport trolley moves forward on the track and enters the area below the bridge erecting machine from the rear of the bridge erecting machine. Both the No. 1 and No. 2 railway beam transport trolleys are equipped with telescopic support frames for supporting the bridge erecting machine. A transfer station for turning is built on the track. S102, Rear outriggers of bridge erecting machine with tire travel function: The rear outriggers and front outriggers of the bridge erecting machine work alternately until the bridge erecting machine is lowered onto the No. 2 railway beam transport trolley and locked. The auxiliary outriggers of the bridge erecting machine are erected and support the bridge erecting machine. The rear outriggers of the bridge erecting machine continue to retract until the tire travel mechanism of the rear outriggers leaves the road surface, and the tire travel function of the rear outriggers is canceled. S103. The bridge erecting machine moves backward on the track: By alternately pushing the auxiliary outriggers and front outriggers towards the track, and simultaneously coordinating with the backward movement of the No. 2 railway beam transport trolley, the bridge erecting machine moves backward on the track until the beam transport position of the No. 1 railway beam transport trolley is on the track. Then, the overhead crane of the bridge erecting machine lifts the No. 1 railway beam transport trolley onto the track. At the same time, the No. 1 railway beam transport trolley is located below the beam transport position of the No. 1 railway beam transport trolley on the bridge erecting machine, so that the distance between the No. 1 railway beam transport trolley and the No. 2 railway beam transport trolley is equal to the distance between the two beam transport positions on the bridge erecting machine. S104. Remove the transverse bolster beam of the front outrigger of the bridge erecting machine: retract the front outrigger and then remove the transverse bolster beam of the front outrigger. S105. The bridge erecting machine has the function of traveling on the track: the telescopic support frame and auxiliary legs on the No. 2 railway beam transport trolley work alternately until the bridge erecting machine is lowered onto the No. 1 railway beam transport trolley and locked. The No. 1 railway beam transport trolley and the No. 2 railway beam transport trolley are in the support state. Then the auxiliary legs are retracted. At this time, the bridge erecting machine has the function of traveling on the track. S2. Machine reversing: The entire machine reverses along the track into the transfer station, realizing the reversing and turning of the bridge erecting machine; S3, Machine passing through tunnel: The machine travels forward along the track and passes through the tunnel. When passing through the tunnel, the No. 1 railway beam transport trolley and the No. 2 railway beam transport trolley are used to adjust the tunnel boundary so that the machine can pass through the tunnel safely. S4. Lowering the bridge erecting machine onto the track, which includes the following sub-steps: S401. Install the front support leg bolster beam and erect the front support leg: Move the whole machine forward until the front support leg of the bridge erecting machine moves out of the track, install the transverse bolster beam, and erect the front support leg on the road surface outside the track. The telescopic support frame of the No. 1 railway beam transport trolley is lowered until the support state of the No. 1 railway beam transport trolley is released. S402, Erection of auxiliary outriggers of bridge erecting machine: The No. 2 railway beam transport trolley drives the bridge erecting machine to move forward, the auxiliary outriggers are erected and the front outriggers are retracted, and the No. 1 railway beam transport trolley is lifted by the overhead crane. S403. The bridge erecting machine resumes tire travel function: The No. 2 railway beam transport trolley continues to drive the bridge erecting machine forward until the rear outrigger moves out of the track. The front outrigger is erected and the auxiliary outrigger is retracted. Then the rear outrigger is erected until the tire travel mechanism of the rear outrigger contacts the road surface. The telescopic support frame of the No. 2 railway beam transport trolley is lowered until the support state of the No. 2 railway beam transport trolley is released. At this time, the bridge erecting machine resumes tire travel function. The No. 2 railway beam transport trolley exits the bridge erecting machine along the track and moves out of the No. 1 railway beam transport trolley at the same time.

2. The tunnel construction method for railway transfer according to claim 1, characterized in that, In step S102, after the rear outriggers of the bridge erecting machine have completed the tire-free travel function, the horizontality of the bridge erecting machine's boom is adjusted by the No. 2 railway beam transport trolley and auxiliary outriggers.

3. The tunnel construction method for railway transfer according to claim 2, characterized in that, The horizontality of the bridge erecting machine's boom does not exceed 7‰.

4. The tunnel construction method for railway transfer according to claim 1, characterized in that, The bridge erecting machine is equipped with a beam transport interface for transferring beams.

5. A tunnel construction method for railway transfer according to claim 1, characterized in that, The transfer station uses a double-track to four-track turnout.

6. The tunnel construction method for railway transfer according to claim 1, characterized in that, The telescopic support frame consists of a base, a support column, a support plate, and a drive cylinder assembly. The base is installed on a railway beam transport trolley, the support column is fixed on the base, and the support plate is slidably installed on the support column and driven to move on the support column by the drive cylinder assembly. The support plate supports the bridge erecting machine during transport.

7. A tunnel construction method for railway transfer according to claim 6, characterized in that, The drive cylinder assembly consists of cylinders symmetrically arranged on both sides of the support column.

8. A tunnel construction method for railway transfer according to claim 6, characterized in that, The height of the No. 1 and No. 2 railway beam transport trolleys, including their bases, is the same as the height of the highway beam transport vehicle matched with the bridge erecting machine.

9. A tunnel construction method for railway transfer according to claim 1, characterized in that, Both the No. 1 and No. 2 railway beam transport trolleys are wheel-rail type beam transport vehicles.

10. A tunnel construction method for railway transfer according to claim 7, characterized in that, In step S3, when passing through the curved section inside the tunnel, the attitude of the bridge erecting machine is adjusted by the drive cylinder group.

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