Construction method for erecting double-track beam in small-section tunnel

Abstract

The invention relates to a double-track beam erection construction method in a small-section tunnel, and belongs to the technical field of beam erection construction.The method comprises the steps that when the last section of track beam of an uplink and a downlink of a tunnel exit is to be erected, a bridge girder erection machine enters the tunnel and stands at the position of the tunnel exit; a beam transporting vehicle transports the last section of track beam of the uplink into the tunnel from the downlink, and the last section of track beam is taken down through front and rear transporters and then placed at the exit of the tunnel of the downlink; the bridge girder erection machine transversely moves from the uplink to the exit of the downlink tunnel to take the girder and transversely moves to the uplink to complete erection of the last section of track girder of the uplink at the exit of the tunnel; and then the beam transporting vehicle and the transporter are used for erecting the remaining track beams of the downlines in the tunnel. According to the construction method, the girder transporting vehicle, the transporter and the bridge girder erection machine are matched together to achieve girder erection in the small-section tunnel, the bridge girder erection machine can pass through the double-track tunnel without disassembly and can be matched with the girder transporting vehicle and the transporter, and the effect of girder erection under the extreme height limiting environment working conditions such as a tunnel entrance and a tunnel entrance is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of beam erection construction, and in particular to a method for erecting double-track beams in a small-section tunnel. Background Art

[0002] The current construction method generally used for straddle-type rail transit is the split single-line transport and erection method. The beam transport vehicle transports beams on a single line, and the bridge erection machine erects beams on a single line. The beam transport vehicle can carry the bridge erection machine through the tunnel, but due to the height limitation of the small-section tunnel, the bridge erection machine cannot take beams from the beam transport vehicle in the tunnel, so it is impossible to erect track beams in the tunnel.

[0003] In the related technologies, the use of bridge erection machines to erect rail beams in tunnels is realized, and there is an integrated erection method inside and outside the tunnel. This equipment integrates beam transportation and beam erection, and has certain applications in high-speed railway bridge erection, especially when there are many tunnels. The integrated transport and erection vehicle is relatively long and heavy, with a deadweight of no less than 130 tons. Although the tunnel height clearance can meet the requirements for erecting rail beams, the construction prerequisites are harsh and are limited by the load-bearing capacity of the rail beams, making implementation difficult.

[0004] In view of this, it is necessary to design a construction method for erecting double-track rail beams in small-section tunnels to solve the problem of erecting beams in small-section tunnels in straddle-type rail transit. Summary of the invention

[0005] The embodiment of the present application provides a construction method for erecting double-track rail beams in a small-section tunnel to solve the problem of erecting beams in small-section tunnels in straddle-type rail transit.

[0006] The embodiment of the present application provides a method for erecting a double-track rail beam in a small-section tunnel, comprising:

[0007] Step S1, two front and rear transporters are arranged in the tunnel, the beam transporter transports the first section of rail beam to the tunnel entrance, and the front and rear transporters take the first section of rail beam from the beam transporter and lay it in the tunnel;

[0008] Step S2, the beam transport vehicle transports the remaining rail beams into the tunnel through the first rail beam, and cooperates with the front and rear transporters to take, transport and drop beams to erect the remaining rail beams in the tunnel;

[0009] Step S3: When the last track beam of the up-line and down-line of the tunnel exit is to be erected, the bridge erecting machine enters the tunnel and stands at the tunnel exit;

[0010] Step S4: The beam transport vehicle transports the last rail beam of the up line from the down line into the tunnel, and removes it through the front and rear transporters and places it at the exit of the down line tunnel;

[0011] Step S5, the bridge erecting machine moves horizontally from the up line to the tunnel exit of the down line to take the beam and moves horizontally to the up line to complete the erection of the last track beam of the up line at the tunnel exit;

[0012] Step S6: Use the beam transport vehicle and the transport machine to complete the installation of the remaining track beams on the down line in the tunnel.

[0013] In some embodiments, the step S1 includes:

[0014] Step S11: After the bridge erecting machine has erected the track beams entering the tunnel entrance, it stops on the up line, and the beam transport vehicle carries the transport machine from the down line into the tunnel;

[0015] Step S12: The front and rear transporters enter the tunnel successively, and the beam transporter returns to the beam yard to transport the first section of the downline rail beam to the tunnel entrance;

[0016] Step S13, the rear transporter drags the first section of the downline rail beam on the beam transport vehicle forward into the tunnel, and the front end of the first section of the downline rail beam is temporarily supported;

[0017] Step S14, the front and rear transporters retreat and simultaneously lift the first section of the downline track beam, and after the front and rear transporters advance to their positions, they lower the first section of the downline track beam into the tunnel.

[0018] In some embodiments, step S2 includes:

[0019] Step S21, the beam transport vehicle transports the track beam to be laid on the upline into the tunnel through the first track beam of the downline, the front and rear transporters take the beams at the same time, and the beam transport vehicle exits;

[0020] Step S22, the front and rear transporters move forward and transversely to one side of the upward line, then move longitudinally backward and align and install the track beam to be laid on the upward line;

[0021] Step S23, repeat the above steps S21 and S22, and lay other track beams of the up line in sequence.

[0022] In some embodiments, in step S2, the bridge-erecting machine stops at the entrance of the up-line tunnel, and the beam transport vehicle transports the track beams into the tunnel via the down-line. When laying the first section of track beams on the up-line, the front legs of the bridge-erecting machine are retracted and suspended to make room for the track beam installation.

[0023] In some embodiments, in step S3, the bridge erection machine is transported to the tunnel exit position by a beam transport vehicle equipped with a frame, and a rotating device for adjusting the position of the frame is provided at the bottom of the frame.

[0024] In some embodiments, step S3 includes:

[0025] Step S31, when the last track beam of the upward line at the tunnel exit is to be erected, the bridge erection machine is carried into the tunnel by a beam transport vehicle equipped with a carrying frame;

[0026] Step S32, after the bridge erecting machine is carried to the position, the front legs are moved forward along the machine arm and then extended to provide support, and the middle legs are moved forward along the machine arm and then extended to provide support;

[0027] Step S33, the frame and the arm are unlocked, and after the beam transport vehicle retreats to a predetermined position, the rear frame and the arm are locked, the front frame is retracted, the middle leg is suspended, the arm is supported by the front leg and the rear frame, and the arm is driven forward along the upward line by the middle leg. After the front end of the arm extends out of the tunnel exit, the front leg is extended for support;

[0028] Step S34, the front and rear trolleys on the arm move to the front end of the arm, the rear carrier is unlocked and retracted, the beam transport vehicle withdraws, and the bridge erection machine station is located at the tunnel exit.

[0029] In some embodiments, step S31 includes:

[0030] Step S311, when the last rail beam of the upward line at the tunnel exit is to be erected, the beam transport vehicle is equipped with a load frame and enters the bridge erection machine, the bridge erection machine is supported by the front and middle legs, the front and rear trolleys on the machine arm retreat to the end, and the whole machine falls onto the front load frame;

[0031] Step S312, the beam transport vehicle moves forward along the upward line, and after the front pack frame slides on the machine arm for a preset distance, the rear pack frame supports the machine arm, the front pack frame retracts, and the beam transport vehicle continues to move forward. After the rear pack frame slides on the machine arm to the carrying position, the front pack frame rises and supports the machine arm together with the rear pack frame, and the pack frame and the machine arm are locked;

[0032] Step S313: the front and middle legs of the bridge erecting machine are retracted and retreated to the vicinity of the beam transport vehicle, and the beam transport vehicle moves forward and carries the bridge erecting machine into the tunnel.

[0033] In some embodiments, in step S33, the front legs of the bridge erecting machine are supported on the first pillar outside the tunnel exit, and the middle legs are supported on the track beam of the up line.

[0034] In some embodiments, step S5 includes:

[0035] Step S51, the bottoms of the front legs and the middle legs of the bridge erecting machine are respectively installed with transverse tracks spanning the up line and the down line;

[0036] Step S52, the front legs and the middle legs move horizontally along the horizontal moving track to the down line, driving the machine arm to move horizontally from the up line to the exit of the down line tunnel;

[0037] Step S53, the front and rear trolleys on the machine arm synchronously lift the last track beam of the upward line, and the bridge erecting machine moves horizontally back to the upward line and then lowers and lays the last track beam of the upward line.

[0038] In some embodiments, step S6 includes:

[0039] Step S61: The bridge erecting machine moves forward by itself, and uses a beam transporter and a handling machine to transport the beam to the exit of the down-line tunnel. After the bridge erecting machine moves horizontally to take the beam, it moves it back to the up-line and lowers it. After completion, the first section of the track beam of the up-line outside the tunnel exit is erected;

[0040] Step S62, using a beam transporter and a handling machine to transport the beam to the exit of the down-line tunnel, cooperating with the bridge erecting machine to take the beam and then move it forward and lower it, and after completion, the first section of the down-line track beam outside the tunnel exit is erected;

[0041] Step S63: the bridge erecting machine moves forward on its own and moves out of the tunnel as a whole. The height of the bridge erecting machine is raised, and the beam transport vehicle transports beams from the upward line to cooperate with the bridge erecting machine to continue to erect other track beams outside the tunnel.

[0042] Step S63: while the bridge erecting machine continues to erect other track beams outside the tunnel, a beam transport vehicle is used to transport beams from the down line, and the front and rear transport machines are cooperated to take, transport and drop beams to complete the laying of the remaining track beams on the down line in the tunnel.

[0043] The beneficial effects of the technical solution provided by this application include:

[0044] An embodiment of the present application provides a construction method for erecting double-track rail beams in a small-section tunnel, which uses a beam transport vehicle, a handling machine and a bridge-erecting machine to cooperate with each other to achieve beam erection in a small-section tunnel. The bridge-erecting machine can pass through the double-track tunnel without disassembling, and cooperate with the beam transport vehicle and the handling machine to achieve the effect of beam erection under extreme height-restricted environment conditions such as tunnel entrances and exits. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 This is a schematic diagram of a beam transport vehicle carrying a transport machine to a tunnel entrance according to an embodiment of the present application;

[0047] Figure 2 This is a schematic diagram of the front and rear transporters simultaneously taking the beams after the first section of the downline track beam in the tunnel of the embodiment of the present application is temporarily supported;

[0048] Figure 3 This is a schematic diagram of the alignment installation of the first track beam section of the up line in the tunnel according to an embodiment of the present application;

[0049] Figure 4 This is a schematic diagram of a bridge erecting machine according to an embodiment of the present application located at a tunnel exit;

[0050] Figure 5 It is a schematic diagram of the bridge erecting machine of the embodiment of the present application moving horizontally to the down line to take the beam when laying the last track beam of the up line at the tunnel exit;

[0051] Figure 6 This is a schematic diagram of the bridge-building machine of an embodiment of the present application moving horizontally to the downline to pick up the beam when laying the first section of track beam of the downline outside the tunnel exit.

[0052] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0053] 100. Bridge erecting machine; 200. Beam transport vehicle; 300. Transport machine. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0055] The embodiment of the present application provides a construction method for erecting double-track rail beams in a small-section tunnel to solve the problem of erecting beams in small-section tunnels in straddle-type rail transit.

[0056] See also Figures 1 to 5 As shown, the embodiment of the present application provides a construction method for erecting double-track rail beams in a small-section tunnel. The construction method includes:

[0057] Step S1, two front and rear transporters are arranged in the tunnel, the beam transporter transports the first section of rail beam to the tunnel entrance, and the front and rear transporters take the first section of rail beam from the beam transporter and lay it in the tunnel;

[0058] Step S2, the beam transport vehicle transports the remaining rail beams into the tunnel through the first rail beam, and cooperates with the front and rear transporters to take, transport and drop beams to erect the remaining rail beams in the tunnel;

[0059] Step S3: When the last track beam of the up-line and down-line of the tunnel exit is to be erected, the bridge erecting machine enters the tunnel and stands at the tunnel exit;

[0060] Step S4: The beam transport vehicle transports the last rail beam of the up line from the down line into the tunnel, and removes it through the front and rear transporters and places it at the exit of the down line tunnel;

[0061] Step S5, the bridge erecting machine moves horizontally from the up line to the tunnel exit of the down line to take the beam and moves horizontally to the up line to complete the erection of the last track beam of the up line at the tunnel exit;

[0062] Step S6: Use the beam transport vehicle and the transport machine to complete the installation of the remaining track beams on the down line in the tunnel.

[0063] The construction method for erecting double-track rail beams in a small-section tunnel in an embodiment of the present application adopts a beam transport vehicle 200, a handling machine 300 and a bridge-building machine 100 to cooperate with each other to realize beam erection in a small-section tunnel. The bridge-building machine 100 can pass through the double-track tunnel without disassembling, and cooperate with the beam transport vehicle 200 and the handling machine 300 to realize the effect of beam erection under extreme height-restricted environment conditions such as tunnel exits and tunnel entrances.

[0064] Specifically, the two transporters 300 can be carried to the tunnel entrance by the beam transport vehicle 200, and then drive into the tunnel front and rear. The track beams to be laid in the tunnel are laid by the beam transport vehicle 200 and the front and rear transporters 300. After the last section of the track beam is laid at the tunnel entrance, the beam transport vehicle 200 cannot move sideways to the other side of the line. Therefore, the last section of the track beam on the up and down lines at the tunnel exit is laid by the bridge erecting machine 100 in cooperation with the transporter 300 and the beam transport vehicle 200.

[0065] When the last track beam of the up line is reached, the bridge erecting machine 100 enters the tunnel from the low position of the up line and moves to the tunnel exit. At this time, the bridge erecting machine 100 is limited by the tunnel height. In order to facilitate the bridge erecting machine 100 to take the beam and erect the last track beam of the up line, the beam transport vehicle 200 is used to transport the beam from the down line to the tunnel, and the front and rear transporters 300 take the beam and lower it to the down line tunnel exit to make up for the problem of insufficient height of the bridge erecting machine 100 to take the beam.

[0066] Then, the bridge erecting machine 100 is used to move horizontally to lift the last track beam of the upward line from the tunnel ground, and then the last track beam is driven to move horizontally back to the bottom of the upward line to lay the last track beam of the upward line. Similarly, the first track beam of the upward line and the downward line outside the tunnel exit can also be laid after taking the beam from the tunnel ground. The remaining track beams of the downward line in the tunnel are laid by the beam transport vehicle 200 and the front and rear transporters 300.

[0067] In some alternative embodiments: See Figures 1 to 5 As shown, the embodiment of the present application provides a method for erecting a double-track rail beam in a small-section tunnel. The step S1 of the method for erecting a double-track rail beam in a small-section tunnel includes:

[0068] Step S11: After the bridge erecting machine has erected the track beams entering the tunnel entrance, it stops on the up line, and the beam transport vehicle carries the transport machine from the down line into the tunnel;

[0069] Step S12: The front and rear transporters enter the tunnel successively, and the beam transporter returns to the beam yard to transport the first section of the downline rail beam to the tunnel entrance;

[0070] Step S13, the rear transporter drags the first section of the downline rail beam on the beam transport vehicle forward into the tunnel, and the front end of the first section of the downline rail beam is temporarily supported;

[0071] Step S14, the front and rear transporters retreat and simultaneously lift the first section of the downline track beam, and after the front and rear transporters advance to their positions, they lower the first section of the downline track beam into the tunnel.

[0072] After the bridge erection machine 100 of the embodiment of the present application has erected the track beam entering the tunnel entrance, it stops on the up line, and the beam transport vehicle 200 carries the transport machine 300 from the down line into the tunnel. The front and rear transport machines 300 enter the tunnel one after another, and the beam transport vehicle 200 returns to the beam yard to transport the beam. Since one end of the track beam at the tunnel entrance is erected on a support and the other end is erected in the tunnel, the beam transport vehicle 200 cannot transport the entire track beam into the tunnel. Instead, it adopts a method of first dragging the beam, then temporarily supporting it, and finally transporting the beam by the front and rear transport machines 300 at the same time.

[0073] Specifically, the beam transport vehicle 200 carries the transporter 300 from the downline into the tunnel, the front and rear transporters 300 drive into the tunnel one after another, the beam transport vehicle 200 returns to the beam yard to transport the first section of track beam of the downline to the tunnel entrance, the rear transporter 300 lifts the front end of the first section of track beam of the downline, and then drags it forward into the tunnel along the beam transport vehicle 200. After the first section of track beam of the downline enters the tunnel as a whole, a temporary support is installed in the tunnel to support the front end of the first section of track beam of the downline, the front and rear transporters 300 retreat synchronously and take the beam, and then remove the temporary support. After the front and rear transporters 300 move forward to their positions, they lower the first section of track beam of the downline into the tunnel.

[0074] In some alternative embodiments: See Figures 1 to 5 As shown, the embodiment of the present application provides a method for erecting a double-track rail beam in a small-section tunnel. The step S2 of the method for erecting a double-track rail beam in a small-section tunnel includes:

[0075] Step S21, the beam transport vehicle transports the track beam to be laid on the upline into the tunnel through the first track beam of the downline, the front and rear transporters take the beams at the same time, and the beam transport vehicle exits;

[0076] Step S22, the front and rear transporters move forward and transversely to one side of the upward line, then move longitudinally backward and align and install the track beam to be laid on the upward line;

[0077] Step S23, repeat the above steps S21 and S22, and lay other track beams of the up line in sequence.

[0078] The beam transport vehicle 200 of the embodiment of the present application can transport the remaining track beams to be laid into the branch tunnel through the first section of track beams of the downline that have been laid in the tunnel, making it convenient for the front and rear transporters 300 to directly and synchronously take the beams. The transporter 300 can drive the track beams to move longitudinally and transversely, so that track beams at other locations in the tunnel can be laid.

[0079] In some alternative embodiments: See Figures 1 to 5 As shown, an embodiment of the present application provides a method for erecting double-track track beams in a small-section tunnel. In step S2 of the method for erecting double-track track beams in a small-section tunnel, a bridge-erecting machine stops at the entrance of the up-line tunnel, and a beam transport vehicle transports the track beams into the tunnel via the down-line. When laying the first section of the track beam of the up-line, the front legs of the bridge-erecting machine are retracted and suspended in the air to make room for the installation of the track beams.

[0080] The bridge-building machine 100 of the embodiment of the present application stops at the entrance of the up-line tunnel, and the beam transport vehicle 200 transports the track beams into the tunnel via the down-line. When the beam transport vehicle 200 cooperates with the front and rear transporters 300 to lay the first section of track on the up-line, the front legs of the bridge-building machine 100 retract and hang in the air to make room for the installation of the track beams, making it convenient for the front and rear transporters 300 to align and lay the first section of track beams on the up-line.

[0081] In some alternative embodiments: See Figures 1 to 5 As shown, an embodiment of the present application provides a method for erecting double-track rail beams in a small-section tunnel. In step S3 of the method for erecting double-track rail beams in a small-section tunnel, a bridge-erecting machine is carried to the tunnel exit position by a beam transport vehicle equipped with a load frame, and a rotating device for adjusting the position of the load frame is provided at the bottom of the load frame.

[0082] The bridge erecting machine 100 of the embodiment of the present application is carried by a beam transport vehicle 200 equipped with a carrying frame, so that the bridge erecting machine 100 can quickly reach the tunnel exit position. Further, a rotating device is installed at the bottom of the carrying frame, and the rotating device can adjust the position of the carrying frame to facilitate the carrying frame to support the machine arm. Exemplarily, the rotating device can be a rotating platform.

[0083] In some alternative embodiments: See Figures 1 to 5 As shown, the embodiment of the present application provides a method for erecting a double-track rail beam in a small-section tunnel. The step S3 of the method for erecting a double-track rail beam in a small-section tunnel includes:

[0084] Step S31, when the last track beam of the upward line at the tunnel exit is to be erected, the bridge erection machine is carried into the tunnel by a beam transport vehicle equipped with a carrying frame;

[0085] Step S32, after the bridge erecting machine is carried to the position, the front legs are moved forward along the machine arm and then extended to provide support, and the middle legs are moved forward along the machine arm and then extended to provide support;

[0086] Step S33, the frame and the arm are unlocked, and after the beam transport vehicle retreats to a predetermined position, the rear frame and the arm are locked, the front frame is retracted, the middle leg is suspended, the arm is supported by the front leg and the rear frame, and the arm is driven forward along the upward line by the middle leg. After the front end of the arm extends out of the tunnel exit, the front leg is extended for support;

[0087] Step S34, the front and rear trolleys on the arm move to the front end of the arm, the rear carrier is unlocked and retracted, the beam transport vehicle withdraws, and the bridge erection machine station is located at the tunnel exit.

[0088] The last track beam at the tunnel exit of the embodiment of the present application is erected by the bridge erecting machine 100 in cooperation with the handling machine 300 and the beam transport vehicle 200. Since both ends of the tunnel are suspended and a double-track track is erected, the front and rear handling machines 300 cannot move out of the tunnel. If the front and rear handling machines 300 take beams from the beam transport vehicle 200 and lay them all the way to the last track beam of the up line at the tunnel exit, the front and rear handling machines 300 will have no lateral movement space and cannot move horizontally to the down line to lay the last track beam of the down line. Therefore, the last track beam of the up line is delivered by the handling machine 300, and the bridge erecting machine 100 is erected by taking and placing the beam.

[0089] Specifically, when the last section of rail beam of the ascending line at the tunnel exit is to be erected, the bridge erecting machine 100 is carried to the position where the last section of rail beam is to be laid in the tunnel by the beam transport vehicle 200 equipped with a backpack, the front support leg moves forward along the machine arm and is extended to provide support, the middle support leg moves forward along the machine arm and is extended to provide support, the machine arm is supported by the front support legs and the rear backpack, the machine arm is driven forward along the ascending line by the middle support leg, after the front end of the machine arm is extended out of the tunnel exit, the front support leg is extended to provide support, finally the front and rear trolleys on the machine arm move to the front end of the machine arm, the rear backpack is unlocked and retracted, the beam transport vehicle 200 withdraws, and the bridge erecting machine 100 stands at the tunnel exit, which is convenient for subsequent horizontal movement to take the beams.

[0090] In some alternative embodiments: See Figures 1 to 5 As shown, the embodiment of the present application provides a method for erecting a double-track rail beam in a small-section tunnel. The step S31 of the method for erecting a double-track rail beam in a small-section tunnel includes:

[0091] Step S311, when the last rail beam of the upward line at the tunnel exit is to be erected, the beam transport vehicle is equipped with a load frame and enters the bridge erection machine, the bridge erection machine is supported by the front and middle legs, the front and rear trolleys on the machine arm retreat to the end, and the whole machine falls onto the front load frame;

[0092] Step S312, the beam transport vehicle moves forward along the upward line, and after the front pack frame slides on the machine arm for a preset distance, the rear pack frame supports the machine arm, the front pack frame retracts, and the beam transport vehicle continues to move forward. After the rear pack frame slides on the machine arm to the carrying position, the front pack frame rises and supports the machine arm together with the rear pack frame, and the pack frame and the machine arm are locked;

[0093] Step S313: the front and middle legs of the bridge erecting machine are retracted and retreated to the vicinity of the beam transport vehicle, and the beam transport vehicle moves forward and carries the bridge erecting machine into the tunnel.

[0094] In the embodiment of the present application, in order to facilitate the rapid movement of the bridge-building machine 100 into the tunnel, the bridge-building machine 100 is transported by a beam transport vehicle 200 equipped with a saddle frame. The rear legs of the bridge-building machine 100 are flipped upward, and the beam transport vehicle 200 enters under the machine arm. After the front and rear saddle frames are in place, they support the machine arm and are locked with the machine arm. The front and middle legs of the bridge-building machine 100 are retracted and retreated close to the beam transport vehicle 200, so that the beam transport vehicle 200 can drive the entire vehicle quickly and stably to the position where the last section of track beam is to be laid in the tunnel.

[0095] In some alternative embodiments: See Figures 1 to 5 As shown, an embodiment of the present application provides a method for erecting a double-track rail beam in a small-section tunnel. In step S33 of the method for erecting a double-track rail beam in a small-section tunnel, the front legs of the bridge-building machine are supported on the first pillar outside the tunnel exit, and the middle legs are supported on the rail beam of the up line.

[0096] The front legs of the bridge-building machine 100 of the embodiment of the present application are supported on the first pillar outside the tunnel exit, and the middle legs are supported on the track beam of the ascending line. The bridge-building machine 100 is in a low position, and the entire machine is basically located in the tunnel, preparing for laying the last section of the track beam of the ascending line at the tunnel exit.

[0097] In some alternative embodiments: See Figures 1 to 5 As shown, the embodiment of the present application provides a method for erecting a double-track rail beam in a small-section tunnel. The step S5 of the method for erecting a double-track rail beam in a small-section tunnel includes:

[0098] Step S51, the bottoms of the front legs and the middle legs of the bridge erecting machine are respectively installed with transverse tracks spanning the up line and the down line;

[0099] Step S52, the front legs and the middle legs move horizontally along the horizontal moving track to the down line, driving the machine arm to move horizontally from the up line to the exit of the down line tunnel;

[0100] Step S53, the front and rear trolleys on the machine arm synchronously lift the last track beam of the upward line, and the bridge erecting machine moves horizontally back to the upward line and then lowers and lays the last track beam of the upward line.

[0101] The bottom of the front legs and the middle legs of the bridge erecting machine 100 of the embodiment of the present application are respectively installed with transverse tracks that cross the up line and the down line. When the beam transport vehicle 200 transports the last track beam of the up line from the down line into the tunnel, and after it is taken down by the front and rear transporters 300 and placed at the exit of the tunnel of the down line, the front legs and the middle legs are transversely moved to the down line along the transverse tracks, driving the machine arm to transversely move from the up line to the exit of the tunnel of the down line, and the front and rear trolleys on the machine arm are used to synchronously lift the last track beam of the up line on the tunnel ground, and after transversely moving to the up line, they are lowered for laying, thereby completing the laying of the last track beam of the up line.

[0102] In some alternative embodiments: See Figures 1 to 5 As shown, the embodiment of the present application provides a method for erecting a double-track beam in a small-section tunnel. The step S6 of the method for erecting a double-track beam in a small-section tunnel includes:

[0103] Step S61: The bridge erecting machine moves forward by itself, and uses a beam transporter and a handling machine to transport the beam to the exit of the down-line tunnel. After the bridge erecting machine moves horizontally to take the beam, it moves it back to the up-line and lowers it. After completion, the first section of the track beam of the up-line outside the tunnel exit is erected;

[0104] Step S62, using a beam transporter and a handling machine to transport the beam to the exit of the down-line tunnel, cooperating with the bridge erecting machine to take the beam and then move it forward and lower it, and after completion, the first section of the down-line track beam outside the tunnel exit is erected;

[0105] Step S63: the bridge erecting machine moves forward on its own and moves out of the tunnel as a whole. The height of the bridge erecting machine is raised, and the beam transport vehicle transports beams from the upward line to cooperate with the bridge erecting machine to continue to erect other track beams outside the tunnel.

[0106] Step S63: while the bridge erecting machine continues to erect other track beams outside the tunnel, a beam transport vehicle is used to transport beams from the down line, and the front and rear transport machines are cooperated to take, transport and drop beams to complete the laying of the remaining track beams on the down line in the tunnel.

[0107] In the embodiment of the present application, when the first track beam outside the tunnel exit is erected, half of the bridge erecting machine 100 is still located in the tunnel, and the beam cannot be fed by the beam transporter 200. Therefore, the first track beam outside the tunnel exit can be moved to the tunnel exit position by the transporter 300 to facilitate the bridge erecting machine 100 to take the beam. In addition, while the bridge erecting machine 100 continues to erect other track beams outside the tunnel, the beam transporter 200 is used to transport beams from the downline, and the front and rear transporters 300 are used to take, transport and drop beams to complete the laying of the remaining track beams on the downline in the tunnel.

[0108] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0109] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0110] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A construction method for erecting double-track rail beams in a small-section tunnel, characterized in that: Construction methods include: Step S1, two front and rear transporters are arranged in the tunnel, the beam transporter transports the first section of rail beam to the tunnel entrance, and the front and rear transporters take the first section of rail beam from the beam transporter and lay it in the tunnel; Step S2, the beam transport vehicle transports the remaining rail beams into the tunnel through the first rail beam, and cooperates with the front and rear transporters to take, transport and drop beams to erect the remaining rail beams in the tunnel; Step S3: When the last track beam of the up-line and down-line of the tunnel exit is to be erected, the bridge erecting machine enters the tunnel and stands at the tunnel exit; Step S4: The beam transport vehicle transports the last rail beam of the up line from the down line into the tunnel, and removes it through the front and rear transporters and places it at the exit of the down line tunnel; Step S5, the bridge erecting machine moves horizontally from the up line to the tunnel exit of the down line to take the beam and moves horizontally to the up line to complete the erection of the last track beam of the up line at the tunnel exit; Step S6: Use the beam transport vehicle and the transport machine to complete the installation of the remaining track beams on the down line in the tunnel.

2. The method for erecting double-track rail beams in a small-section tunnel according to claim 1, characterized in that: The step S1 comprises: Step S11: After the bridge erecting machine has erected the track beams for entering the tunnel entrance, it stops on the up line, and the beam transport vehicle carries the transport machine from the down line into the tunnel; Step S12: The front and rear transporters enter the tunnel successively, and the beam transporter returns to the beam yard to transport the first section of the downline rail beam to the tunnel entrance; Step S13, the rear transporter drags the first section of the downline rail beam on the beam transport vehicle forward into the tunnel, and the front end of the first section of the downline rail beam is temporarily supported; Step S14, the front and rear transporters retreat and simultaneously lift the first section of the downline track beam, and after the front and rear transporters advance to their positions, they lower the first section of the downline track beam into the tunnel.

3. The method for erecting double-track rail beams in a small-section tunnel according to claim 1, characterized in that: The step S2 comprises: Step S21, the beam transport vehicle transports the track beam to be laid on the upline into the tunnel through the first track beam of the downline, the front and rear transporters take the beams at the same time, and the beam transport vehicle exits; Step S22, the front and rear transporters move forward and transversely to one side of the upward line, then move longitudinally backward and align and install the track beam to be laid on the upward line; Step S23, repeat the above steps S21 and S22, and lay other track beams of the up line in sequence.

4. The method for erecting double-track rail beams in a small-section tunnel according to claim 1, characterized in that: In step S2, the bridge erecting machine stops at the entrance of the up-line tunnel, and the beam transport vehicle transports the track beams into the tunnel via the down-line. When laying the first section of track beams on the up-line, the front legs of the bridge erecting machine are retracted and suspended to make room for the track beam installation.

5. The method for erecting double-track rail beams in a small-section tunnel according to claim 1, characterized in that: In step S3, the bridge erecting machine is carried to the tunnel exit position by a beam transport vehicle equipped with a carrying frame, and a rotating device for adjusting the position of the carrying frame is provided at the bottom of the carrying frame.

6. The method for erecting double-track rail beams in a small-section tunnel according to claim 1, characterized in that: The step S3 comprises: Step S31, when the last track beam of the upward line at the tunnel exit is to be erected, the bridge erection machine is carried into the tunnel by a beam transport vehicle equipped with a carrying frame; Step S32, after the bridge erecting machine is carried to the position, the front legs are moved forward along the machine arm and then extended to provide support, and the middle legs are moved forward along the machine arm and then extended to provide support; Step S33, the frame and the arm are unlocked, and after the beam transport vehicle retreats to a predetermined position, the rear frame and the arm are locked, the front frame is retracted, the middle leg is suspended, the arm is supported by the front leg and the rear frame, and the arm is driven forward along the upward line by the middle leg. After the front end of the arm extends out of the tunnel exit, the front leg is extended for support; Step S34, the front and rear trolleys on the arm move to the front end of the arm, the rear carrier is unlocked and retracted, the beam transport vehicle withdraws, and the bridge erection machine station is located at the tunnel exit.

7. The method for erecting double-track rail beams in a small-section tunnel according to claim 6, characterized in that: The step S31 comprises: Step S311, when the last rail beam of the upward line at the tunnel exit is to be erected, the beam transport vehicle is equipped with a load frame and enters the bridge erection machine, the bridge erection machine is supported by the front and middle legs, the front and rear trolleys on the machine arm retreat to the end, and the whole machine falls onto the front load frame; Step S312, the beam transport vehicle moves forward along the upward line, and after the front pack frame slides on the machine arm for a preset distance, the rear pack frame supports the machine arm, the front pack frame retracts, and the beam transport vehicle continues to move forward. After the rear pack frame slides on the machine arm to the carrying position, the front pack frame rises and supports the machine arm together with the rear pack frame, and the pack frame and the machine arm are locked; Step S313: the front and middle legs of the bridge erecting machine are retracted and retreated to the vicinity of the beam transport vehicle, and the beam transport vehicle moves forward and carries the bridge erecting machine into the tunnel.

8. The method for erecting double-track rail beams in a small-section tunnel according to claim 7, characterized in that: In step S33, the front legs of the bridge erecting machine are supported on the first pillar outside the tunnel exit, and the middle legs are supported on the track beam of the upward line.

9. The method for erecting double-track rail beams in a small-section tunnel according to claim 7, characterized in that: The step S5 comprises: Step S51, the bottoms of the front legs and the middle legs of the bridge erecting machine are respectively installed with transverse tracks spanning the up line and the down line; Step S52, the front legs and the middle legs move horizontally along the horizontal movement track to the downline, driving the arm to move horizontally from the upline to the exit of the downline tunnel; Step S53: The front and rear trolleys on the machine arm synchronously lift the last track beam of the upward line, and the bridge erecting machine moves horizontally back to the upward line and then lowers and lays the last track beam of the upward line.

10. The method for erecting double-track rail beams in a small-section tunnel according to claim 1, characterized in that: The step S6 comprises: Step S61: The bridge erecting machine moves forward by itself, and uses a beam transporter and a handling machine to transport the beam to the exit of the down-line tunnel. After the bridge erecting machine moves horizontally to take the beam, it moves it back to the up-line and lowers it. After completion, the first section of the track beam of the up-line outside the tunnel exit is erected; Step S62, using a beam transporter and a handling machine to transport the beam to the exit of the down-line tunnel, cooperating with the bridge erecting machine to take the beam and then move it forward and lower it, and after completion, the first section of the down-line track beam outside the tunnel exit is erected; Step S63: the bridge erecting machine moves forward on its own and moves out of the tunnel as a whole. The height of the bridge erecting machine is raised, and the beam transport vehicle transports beams from the upward line to cooperate with the bridge erecting machine to continue to erect other track beams outside the tunnel. Step S63: while the bridge erecting machine continues to erect other track beams outside the tunnel, a beam transport vehicle is used to transport beams from the down line, and the front and rear transport machines are cooperated to take, transport and drop beams to complete the laying of the remaining track beams on the down line in the tunnel.

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