A large-span steel-concrete composite beam bridge erecting machine installation method suitable for limited space

Abstract

This invention provides a method for installing a large-span steel-concrete composite beam bridge erecting machine in a limited space. By optimizing the steps of bridge erecting machine assembly, movement, crossing of spans, and tail dismantling, it solves the technical problem that the bridge erecting machine cannot complete assembly due to clearance limitations in tunnels, as well as the technical problem that the long tail structure of the bridge erecting machine is blocked in the tunnel under bridge-tunnel connection conditions, affecting the lateral movement of the bridge erecting machine.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to an installation method for a large-span steel-concrete composite beam bridge erection machine suitable for use in confined spaces. Background Technology

[0002] In existing technologies, there are situations where it is necessary to erect a bridge at the tunnel entrance, resulting in a connection between the tunnel entrance and the bridge. In such cases, due to the limited clearance of the tunnel and the narrow space at the exit, the traditional bridge erecting machine installation method requires a large working space, which cannot meet the construction requirements. Specifically, the bridge erecting machine is restricted by the clearance inside the tunnel and cannot complete the assembly; the tail structure of the bridge erecting machine is relatively long, and in the case of bridge-tunnel connection, the tail of the bridge erecting machine is blocked inside the tunnel, restricting the lateral movement of the bridge erecting machine.

[0003] In addition, for the installation of bridge erecting machines for steel-concrete composite beams with large spans, the thin, tall and long shape of each individual steel beam makes it easy for the individual steel beams to become laterally unstable or twisted during transportation and installation, resulting in overturning. Summary of the Invention

[0004] The present invention aims to provide an installation method for a large-span steel-concrete composite beam bridge erection machine suitable for limited spaces, and to solve the technical problem that the bridge erection machine cannot be assembled due to clearance limitations in tunnels, as well as the technical problem that the tail structure of the bridge erection machine is too long, and the tail of the bridge erection machine is blocked in the tunnel under the condition of bridge-tunnel connection, which affects the lateral movement of the bridge erection machine.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A method for installing a large-span steel-concrete composite beam bridge erecting machine suitable for confined spaces is disclosed for installation in situations where a tunnel connects to a bridge. The tunnel comprises two parallel tunnels, each corresponding to the left and right spans of the bridge beam. The bridge erecting machine includes longitudinal beams, a crossbeam, and a trolley. There are two longitudinal beams, arranged parallel and spaced apart. Each longitudinal beam comprises several sequentially connected segments. The longitudinal beam is equipped with a front guide beam at its front end, a rear support leg at its rear end, a central support assembly between the front guide beam and the rear support leg, and a front support leg between the central support assembly and the front guide beam. The crossbeam slidably connects the two longitudinal beams, and the trolley is slidably mounted on the crossbeam. The method for installing a large-span steel-concrete composite beam bridge erecting machine suitable for confined spaces includes the following steps:

[0007] S1, a transverse track is laid on the cap beam of the bridge, and the cap beams arranged in sequence along the direction away from the tunnel exit are numbered 0#, 1#, ... n# respectively;

[0008] S2, the longitudinal beam, front guide beam, front support leg, middle support assembly and rear support leg of the bridge erecting machine are spliced ​​at the roadbed position outside the tunnel entrance;

[0009] S3, without installing the bridge erecting machine crossbeam and overhead crane, drive the bridge erecting machine spliced ​​in step S2, so that the bridge erecting machine spliced ​​in step S2 enters the tunnel from the entrance of one of the tunnels, until it travels to the exit of the tunnel, so that the longitudinal beam passes through the exit of the tunnel.

[0010] S4, a counterweight is set on the segment at the tail of the longitudinal beam to make the counterweight pass through the hole, so that the front support leg is located on the transverse track of the No. 1 cap beam, and the middle support assembly is slidably set on the transverse track of the No. 0 cap beam. After the hole is completed, the bridge erecting machine crossbeam and the gantry crane are installed on the longitudinal beam outside the exit of another tunnel using a lifting device.

[0011] S5, remove the tail section of the longitudinal beam located in the tunnel, and move the rear support leg forward to the second to last section of the longitudinal beam to avoid the movement of the bridge erecting machine along the transverse track being blocked by the tunnel;

[0012] S6, through the coordinated movement of the bridge erecting machine along the transverse track, the movement of the bridge erecting machine crossbeam along the longitudinal beam, and the movement of the gantry crane along the bridge erecting machine crossbeam, the erection of the left and right spans of the first span of the bridge located between the 0# cap beam and the 1# cap beam is completed.

[0013] S7. After the erection of the left and right beams of the first span is completed, the tail segment of the longitudinal beam is reinstalled, and a counterweight is set on the tail segment of the longitudinal beam for the next span through the hole.

[0014] Furthermore, both the left and right spans of the bridge consist of several steel beam segments. During the erection of the beams in steps S6-S7, the steel beam segments are temporarily connected in pairs and then erected together.

[0015] Furthermore, each of the steel beam segments of the left and right beams includes an inner side beam, a middle beam, and an outer side beam. The erection of each span of the left and right beams includes the following steps:

[0016] The inner side beams of the left and right spans of the bridge are temporarily connected by connectors to form a first assembly, and the middle beam and the corresponding outer side beams are temporarily connected to form a second assembly. During the erection, the first assembly is erected first, and then the second assembly of the left and right spans of the bridge is erected by moving the bridge erecting machine along the transverse track.

[0017] Furthermore, the method for erecting the first assembly is as follows: First, the first assembly is transported to the vicinity of the preset installation position by a beam transport vehicle, and then the first assembly is connected to the overhead crane. Subsequently, the first assembly is lowered to the preset installation position by the movement of the crossbeam of the bridge erecting machine along the longitudinal beam, the movement of the overhead crane along the crossbeam of the bridge erecting machine, and the lifting action of the overhead crane, so that the two inner side beams of the first assembly fall on the cap beams of the left and right beams respectively.

[0018] Furthermore, the method for erecting the second assembly is as follows:

[0019] (1) After transporting the second assembly to the vicinity of the preset installation position of the middle beam by a beam transport vehicle, the second assembly is connected to the overhead crane;

[0020] (2) The second assembly is lowered to the preset installation position of the middle beam by the movement of the crossbeam of the bridge erecting machine along the longitudinal beam, the movement of the gantry crane along the crossbeam of the bridge erecting machine, and the lifting action of the gantry crane.

[0021] (3) Disconnect the middle beam from the gantry crane, keep the outer side beam connected to the gantry crane, and transport the beam body crossbeam connecting the middle beam and the corresponding inner side beam to the location using a beam transport vehicle and hoisting device for installation;

[0022] (4) Release the temporary connection between the outer side beam and the middle beam, and lift the outer side beam to the designed beam placement position by moving the gantry crane along the crossbeam of the bridge erecting machine and by lifting the gantry crane.

[0023] (5) After the outer side beam reaches the designed beam placement position, continue to maintain the connection between the outer side beam and the overhead crane, and install the beam crossbeam connecting the outer side beam and the corresponding middle beam through the beam transport vehicle and hoisting device;

[0024] (6) Disconnect the outer side beam from the overhead crane and complete the installation of the second assembly of one of the beams;

[0025] (7) Drive the bridge erecting machine to move along the transverse track to the installation position of another beam, repeat steps (1)-(6) to complete the installation of the second assembly of the other beam.

[0026] Furthermore, both the first assembly and the second assembly are connected to the overhead crane via a lifting device.

[0027] Furthermore, the middle beam and the outer side beam of the second assembly are both connected to the lifting device by steel wire ropes.

[0028] Furthermore, after disconnecting the middle beam from the overhead crane in step (3), 1-2 temporary lifting points are additionally set on the outer side beam, and the temporary lifting points are connected to the lifting device by steel wire rope.

[0029] By adopting the above technical solution, the present invention has the following beneficial effects:

[0030] The above-mentioned method for installing a large-span steel-concrete composite beam bridge erecting machine in a confined space solves the technical problem that the bridge erecting machine cannot complete assembly due to clearance limitations in tunnels, and the technical problem that the long tail structure of the bridge erecting machine obstructs its lateral movement in tunnels when bridges and tunnels are connected, by optimizing the steps of the bridge erecting machine assembly, movement, crossing of holes and tail dismantling. Attached Figure Description

[0031] Figure 1 This is a structural schematic diagram of a preferred embodiment of the present invention, showing the installation method of a large-span steel-concrete composite beam bridge erection machine suitable for confined spaces during the span-crossing process.

[0032] Figure 2 This is a schematic diagram of the structure when completing the crossing of the span in the installation method of the large-span steel-concrete composite beam bridge erection machine applicable to a confined space according to the present invention.

[0033] Figure 3 This is a structural diagram illustrating the installation of the overhead crane in the method for installing a large-span steel-concrete composite beam bridge erection machine applicable to confined spaces, as described in this invention.

[0034] Figure 4 for Figure 3 A schematic diagram of the right-side structure.

[0035] Figure 5 This is a schematic diagram of the structure of the first assembly according to a preferred embodiment of the present invention.

[0036] Figure 6 This is a schematic diagram of the structure of the second assembly according to a preferred embodiment of the present invention.

[0037] Figures 7-13 This is a schematic diagram illustrating the installation process of each span of a large-span steel-concrete composite beam bridge erection machine, which is a preferred embodiment of the present invention and is applicable to a confined space.

[0038] Explanation of main component symbols

[0039] 100. Bridge erecting machine; 10. Longitudinal beam; 11. Segment; 20. Bridge erecting machine crossbeam; 30. Overhead crane; 40. Front guide beam; 50. Middle support assembly; 60. Front outrigger; 70. Rear outrigger; 80. Rear support assembly; 90. Counterweight; 200. Tunnel; 300. Transverse track; 410. Inner side beam; 420. Middle beam; 430. Outer side beam; 440. First assembly; 450. Second assembly; 460. Connector; 470. Connecting bolt; 480. Beam crossbeam; 500. Lifting device; 600. Cap beam; 700. Wire rope. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] Please also see Figures 1 to 4 A preferred embodiment of the present invention provides an installation method for a large-span steel-concrete composite beam bridge erection machine suitable for use in confined spaces, for installation in the case where a tunnel 200 is connected to a bridge (not shown).

[0044] In this embodiment, the installation method for a large-span steel-concrete composite beam bridge erection machine applicable to confined spaces is used in the case where a tunnel 200 connects to a bridge. The tunnel 200 is a continuous arch tunnel consisting of two tunnels 200 arranged side by side. The two tunnels 200 correspond to the left and right spans of the bridge beams, respectively. The bridge erection machine 100 includes longitudinal beams 10, a bridge erection machine crossbeam 20, and a gantry crane 30. There are two longitudinal beams 10, which are arranged in parallel and spaced apart. Each longitudinal beam 10 includes several segments 11 connected in sequence. The longitudinal beam 10 is equipped with a front guide beam 40 at the front end of the longitudinal beam 10, a rear support leg 70 at the rear end of the longitudinal beam 10, a middle support assembly 50 between the front guide beam 40 and the rear support leg 70, and a front support leg 60 between the middle support assembly 50 and the front guide beam 40. In the bridge erecting machine 100's span-crossing operation, the front guide beam 40 and the front support leg 60 serve as support points, assisting the main beam to smoothly pass through the piers or abutments, reducing deformation and stress on the main beam during span-crossing, and ensuring smooth span-crossing operations. The front support leg 60 and the longitudinal beam 10 are connected by a sliding engagement and are equipped with longitudinal movement components, such as a suspended traveling mechanism and roller devices, allowing the front support leg 60 to move longitudinally along the longitudinal beam 10. In addition to longitudinal movement, the front support leg 60 is also equipped with lateral movement components, such as lateral traveling wheel boxes, which drive the front support leg 60 to move laterally relative to the bridge. The front support leg 60 is also equipped with telescopic columns and lifting cylinders for adjusting its height. Through longitudinal and lateral movement and height adjustment, the front support leg 60 enables the bridge erecting machine 100 to adapt to different construction environments and bridge types, enhancing its versatility and flexibility. The middle support assembly 50 supports the middle section of the longitudinal beam 10, sharing the weight of the main beam and the hoisted object with the front support leg 60 and the rear support leg 70, thus maintaining the stability of the longitudinal beam 10 during hoisting. The middle support assembly 50 also includes a longitudinal beam longitudinal movement drive mechanism and a lateral travel mechanism, which can drive the longitudinal beam 10 to move along the longitudinal and transverse directions of the bridge, enabling the bridge erecting machine 100 to pass through spans and connect beams. The rear support leg 70 provides additional support when the bridge erecting machine 100 is operating through spans, reducing the deformation and stress of the rear cantilever of the main beam of the bridge erecting machine 100 and improving backward tilting stability. The bridge erecting machine crossbeam 20 slidably connects the two longitudinal beams 10, and the overhead crane 30 is slidably mounted on the bridge erecting machine crossbeam 20. The bridge erecting machine crossbeam 20 can move along the length direction of the longitudinal beam 10 (i.e., the longitudinal direction of the bridge), and the overhead crane 30 can move along the length direction of the bridge erecting machine crossbeam 20 (i.e., the transverse direction of the bridge). The structure of the bridge erecting machine 100 is existing technology, and will not be described in detail here to save space.

[0045] Please see also Figures 5 to 13 The installation method of a large-span steel-concrete composite beam bridge erection machine applicable to confined spaces according to embodiments of the present invention includes the following steps:

[0046] S1, a transverse track 300 is laid on the bridge cap beam 600. In this embodiment, the cap beams 600 arranged sequentially in the direction away from the tunnel exit 200 are numbered 0#, 1#, ... n#. The transverse track 300 extends in the transverse direction of the bridge, and the length of the transverse track 300 is greater than the total width of the two tunnels 200.

[0047] S2, at the roadbed location outside the entrance of tunnel 200, the longitudinal beam 10, front guide beam 40, front support leg 60, middle support assembly 50, and rear support leg 70 of the bridge erecting machine 100 are spliced, thus connecting the front guide beam 40, front support leg 60, middle support assembly 50, and rear support leg 70 to the longitudinal beam 10. The connection method between the front guide beam 40, front support leg 60, middle support assembly 50, and rear support leg 70 and the longitudinal beam 10 is existing technology and will not be described in detail here for brevity.

[0048] S3, without installing the bridge erecting machine crossbeam 20 and the overhead crane 30, drive the bridge erecting machine 100 spliced ​​in step S2, so that the bridge erecting machine 100 spliced ​​in step S2 enters one of the tunnels 200 from the entrance of the tunnel 200, until it travels to the exit of the tunnel 200, so that the longitudinal beam 10 passes through the exit of the tunnel 200.

[0049] Because the exit of tunnel 200 connects to the bridge, the space at the exit is narrow. Furthermore, due to the limited clearance of tunnel 200, and the requirement for a large working space for the bridge erecting machine 100 installation method, the location of the tunnel 200 exit cannot meet the installation requirements of the bridge erecting machine 100. In this embodiment, the bridge erecting machine 100 is spliced ​​at the roadbed location outside the tunnel 200 entrance, away from the tunnel 200 entrance. This provides sufficient working space for the installation of the bridge erecting machine 100. After the bridge erecting machine 100 completes the splicing outside the tunnel 200 entrance, it is then driven to enter tunnel 200 from the entrance and move along tunnel 200 to the exit. Meanwhile, considering the limited clearance of tunnel 200, in order to ensure that the bridge erecting machine 100 can pass smoothly through tunnel 200, this embodiment does not install the bridge erecting machine crossbeam 20 and the overhead crane 30 initially. Without installing the crossbeam and overhead crane 30, the bridge erecting machine 100 is driven into tunnel 200 from the entrance. After tunnel 200 has moved to the exit and completed the passage, the bridge erecting machine crossbeam 20 and overhead crane 30 are then installed. This method avoids the bridge erecting machine 100 becoming too tall to pass through tunnel 200 due to the installation of the crossbeam 20 and overhead crane 30. The longitudinal movement of the bridge erecting machine 100 along tunnel 200 mainly relies on the coordinated work of components such as the front support leg 60, rear support leg 70, and middle support assembly 50, which are existing technologies and will not be described in detail here for brevity.

[0050] S4, a counterweight 90 is set on the segment 11 at the tail of the longitudinal beam 10 for counterweight passage, so that the front support leg 60 is located on the transverse track 300 of the No. 1 cap beam 600, and the middle support assembly 50 is slidably set on the transverse track 300 of the No. 0 cap beam 600. After the passage is completed, a lifting device, such as a truck crane, is used to install the bridge erecting machine crossbeam 20 and the overhead crane 30 on the longitudinal beam 10 outside the exit of another tunnel 200.

[0051] The method for the bridge erecting machine 100 to pass through the pier is existing technology and will not be described in detail here for brevity. Before construction, the bridge erecting machine's crossbeam 20 and overhead crane 30 are moved to the exit of another tunnel 200 for storage to facilitate subsequent installation. After passing through the pier, the counterweight 90 is removed from the bridge erecting machine 100.

[0052] In addition, the bridge erecting machine 100 is equipped with tilt sensors and stress sensors to monitor the equipment status in real time. The control center dynamically adjusts the position of the counterweight 90 based on the signals fed back from the tilt sensors and stress sensors to ensure the stability of the bridge erecting machine 100 in the narrow space of the tunnel 200.

[0053] S5, remove the tail segment 11 of the longitudinal beam 10 located in the tunnel 200, and move the rear support leg 70 forward to the second to last segment 11 of the longitudinal beam 10 to avoid the movement of the bridge erecting machine 100 along the transverse track 300 being blocked by the tunnel 200.

[0054] During step S5, the middle support assembly 50, rear outrigger 70, and front outrigger 60 of the bridge erecting machine 100 are simultaneously grounded to maintain the stability of the bridge erecting machine 100. The penultimate segment 11 of the longitudinal beam 10 is the segment 11 closest to the tail segment 11. The dismantled tail segment 11 is supported by the rear support assembly 80 and retained within the tunnel 200 for easy reconnection later.

[0055] S6, through the coordinated movement of the bridge erecting machine 100 along the transverse track 300, the movement of the bridge erecting machine crossbeam 20 along the longitudinal beam 10, and the movement of the overhead crane 30 along the bridge erecting machine crossbeam 20, the erection of the left and right spans of the first span of the bridge located between the 0# cap beam and the 1# cap beam is completed.

[0056] S7. After the erection of the left and right beams of the first span is completed, the tail segment 11 of the longitudinal beam 10 is reinstalled. A counterweight 90 is set on the tail segment 11 of the longitudinal beam 10 to pass through the hole in the next span. After passing through the hole, the erection of the left and right beams of the next span is completed by the bridge erecting machine 100.

[0057] The left and right spans of the bridge each consist of several steel beam segments spaced apart along the transverse direction. During the beam erection in steps S6-S7, these steel beam segments are temporarily connected in pairs before being erected together. Specifically, each steel beam segment of the left and right spans includes an inner side beam 410, a middle beam 420, and an outer side beam 430. The erection of each span of the left and right spans includes the following steps:

[0058] The inner side beams 410 of the left and right spans of the bridge are temporarily connected by connectors 460 to form a first assembly 440, and the middle beam 420 and the corresponding outer side beams 430 are temporarily connected to form a second assembly 450. During erection, the first assembly 440 is erected first, and then the second assembly 450 of the left and right spans of the bridge is erected separately by coordinating the movement of the bridge erecting machine 100 along the transverse track 300.

[0059] In this embodiment, the inner side beams 410 of the left and right spans of the bridge are temporarily connected by connectors 460. The connectors 460 are made of angle steel, which is used to temporarily fix the inner side beams 410 of the left and right spans by welding or other methods. The middle beam 420 is connected to the corresponding outer side beam 430 by connecting bolts 470. Specifically, the connecting bolts 470 can be passed through the steel beam bolt holes (not shown) at the web of the middle beam 420 and the outer side beam 430 for connection.

[0060] During erection, the first assembly 440 is erected first. Specifically, the first assembly 440 is transported to the vicinity of the preset installation position by a beam transport vehicle (not shown in the figure), and then the first assembly 440 is connected to the overhead crane 30. Specifically, the first assembly 440 is connected to the overhead crane 30 by a lifting device 500. Subsequently, the first assembly 440 is lowered to the preset installation position by the movement of the bridge erecting machine crossbeam 20 along the longitudinal beam 10, the movement of the overhead crane 30 along the bridge erecting machine crossbeam 20, and the lifting action of the overhead crane 30, so that the two inner side beams 410 of the first assembly 440 fall on the corresponding cap beams 600 of the left and right tunnels 200 respectively.

[0061] Then, the second assembly 450 of the left and right spans of the bridge is erected respectively. The second assembly 450 of the left and right spans of the bridge is located on opposite sides of the first assembly 440. The erection method of the second assembly 450 is as follows:

[0062] (1) After transporting the second assembly 450 to the vicinity of the preset installation position of the middle beam 420 by the beam transport vehicle, the second assembly 450 is connected to the overhead crane 30.

[0063] Specifically, the second assembly 450 is connected to the overhead crane 30 via a lifting device 500. During connection, the middle beam 420 and the outer side beam 430 of the second assembly 450 are both connected to the lifting device 500 via steel wire ropes 700, and the lifting device 500 is then connected to the overhead crane 30 via steel wire ropes 700.

[0064] (2) By moving the crossbeam 20 of the bridge erecting machine along the longitudinal beam 10, moving the gantry crane 30 along the crossbeam, and lifting the gantry crane 30, the second assembly 450 is lowered to the preset installation position of the middle beam 420.

[0065] (3) Disconnect the connection between the middle beam 420 and the overhead crane 30. Specifically, disconnect the wire rope 700 connecting the lifting device 500 and the middle beam 420. Keep the connection between the outer side beam 430 and the overhead crane 30. After the beam body crossbeam 480 connecting the middle beam 420 and the corresponding inner side beam 410 is transported to the position by the beam transport vehicle and lifting device, such as the tower crane, it is installed.

[0066] In this embodiment, after disconnecting the connection between the middle beam 420 and the overhead crane 30 in step (3), 1-2 temporary lifting points (not marked) are additionally set on the outer side beam 430. The temporary lifting points are connected to the lifting device 500 through the wire rope 700 to improve the stability of the lifting of the outer side beam 430.

[0067] (4) Release the temporary connection between the outer side beam 430 and the middle beam 420, that is, remove the connecting bolt 470; by moving the gantry crane 30 along the crossbeam 20 of the bridge erecting machine and by lifting the gantry crane 30, lift the outer side beam 430 to the designed beam placement position.

[0068] (5) After the outer side beam 430 reaches the designed beam placement position, keep the connection between the outer side beam 430 and the overhead crane 30, and install the beam crossbeam 480 connecting the outer side beam 430 and the corresponding middle beam 420 by means of a beam transport vehicle and hoisting device, such as a tower crane.

[0069] (6) Disconnect the outer side beam 430 from the crane 30, that is, disconnect the wire rope 700 connecting the lifting device 500 and the outer side beam 430, and complete the installation of the second assembly 450 of one of the beams.

[0070] (7) Drive the bridge erecting machine 100 to move along the transverse track 300 to the installation position of the other beam, and repeat steps (1)-(6) to complete the installation of the second assembly 450 of the other beam. After both the left and right beams are installed, the temporary connection between the two inner side beams is released by cutting or other means.

[0071] Since the overhead crane 30 can only move on the crossbeam 20 of the bridge erecting machine between the two longitudinal beams 10, when erecting the left and right beams, it is necessary to first complete the erection of the left beam in one of the tunnels 200, then withdraw the bridge erecting machine 100 along the tunnel 200 to the entrance, and then enter from the entrance of the other tunnel 200 and move to the exit of the tunnel 200 to erect the right beam of the other tunnel 200. This process requires repeated disassembly and assembly of the crossbeam, overhead crane 30, and the tail segment 11 of the longitudinal beam 10, resulting in a prolonged construction period. In this embodiment of the invention, by laying an extended transverse track 300 on the cap beam 600, the bridge erecting machine 100 can be moved laterally to the positions of the left and right beams, thereby enabling the erection of the left and right beams together, avoiding repeated disassembly and assembly of the bridge erecting machine 100, and improving construction efficiency.

[0072] Because the longitudinal beam 10 of the bridge erecting machine 100 is relatively long, in bridge-tunnel connection conditions, the tail of the longitudinal beam of the bridge erecting machine 100 is located inside the tunnel 200, hindering the movement of the bridge erecting machine 100 along the transverse track 300. In this embodiment, by removing the tail segment 11 of the longitudinal beam 10 of the bridge erecting machine 100 located inside the tunnel 200, the smooth movement of the bridge erecting machine 100 along the transverse track 300 is ensured.

[0073] Furthermore, in this embodiment, to ensure the stability of the steel beam segments during transportation and installation, the steel beam segments are fed and erected in pairs, with temporary connection measures between the two segments. Specifically, the inner side beams 410 of the left and right beams are combined to form a first assembly 440, making the first assembly 440 structurally symmetrical and improving stability during transportation and installation. The middle beam 420 is combined with the corresponding outer side beam 430 to form a second assembly 450, which helps maintain the stability of the structural center of gravity during transportation and installation. When installing the outer side beam 430 alone, since the outer side beam 430 is an eccentric structure, maintaining the connection between the outer side beam 430 and the overhead crane 30 during installation can prevent the outer side beam 430 from accidentally overturning due to instability during installation.

[0074] The above description is a detailed description of the preferred embodiments of the present invention. However, the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications made under the technical spirit of the present invention should fall within the patent scope covered by the present invention.

Claims

1. A method for installing a large-span steel-concrete composite beam bridge erecting machine suitable for confined spaces, used for installation in the case of tunnel-bridge connection, wherein the tunnel comprises two parallel tunnels, each corresponding to the left and right spans of the bridge beam; the bridge erecting machine comprises longitudinal beams, a crossbeam, and a trolley; the longitudinal beams are two in number, arranged parallel and spaced apart; each longitudinal beam comprises several segments connected sequentially; the longitudinal beam is equipped with a front guide beam at the front end, a rear support leg at the rear end, a middle support assembly between the front guide beam and the rear support leg, and a front support leg between the middle support assembly and the front guide beam; the crossbeam slidably connects the two longitudinal beams; and the trolley is slidably mounted on the crossbeam; characterized in that... The installation method for a large-span steel-concrete composite beam bridge erection machine suitable for confined spaces includes the following steps: S1, a transverse track is laid on the cap beam of the bridge, and the cap beams arranged in sequence along the direction away from the tunnel exit are numbered 0#, 1#, ... n# respectively; S2, the longitudinal beam, front guide beam, front support leg, middle support assembly and rear support leg of the bridge erecting machine are spliced ​​at the roadbed position outside the tunnel entrance; S3, without installing the bridge erecting machine crossbeam and overhead crane, drive the bridge erecting machine spliced ​​in step S2, so that the bridge erecting machine spliced ​​in step S2 enters the tunnel from the entrance of one of the tunnels, until it travels to the exit of the tunnel, so that the longitudinal beam passes through the exit of the tunnel. S4, a counterweight is set on the segment at the tail of the longitudinal beam to make the counterweight pass through the hole, so that the front support leg is located on the transverse track of the No. 1 cap beam, and the middle support assembly is slidably set on the transverse track of the No. 0 cap beam. After the hole is completed, the bridge erecting machine crossbeam and the gantry crane are installed on the longitudinal beam outside the exit of another tunnel using a lifting device. S5, remove the tail section of the longitudinal beam located in the tunnel, and move the rear support leg forward to the second to last section of the longitudinal beam to avoid the movement of the bridge erecting machine along the transverse track being blocked by the tunnel; S6, through the coordinated movement of the bridge erecting machine along the transverse track, the movement of the bridge erecting machine crossbeam along the longitudinal beam, and the movement of the gantry crane along the bridge erecting machine crossbeam, the erection of the left and right spans of the first span of the bridge located between the 0# cap beam and the 1# cap beam is completed. S7. After the erection of the left and right beams of the first span is completed, the tail segment of the longitudinal beam is reinstalled, and a counterweight is set on the tail segment of the longitudinal beam for the next span through the hole. Each of the steel beam segments of the left and right beams includes an inner side beam, a middle beam, and an outer side beam. When erecting the beams in steps S6-S7, the erection of each span of the left and right beams includes the following steps: The inner side beams of the left and right spans of the bridge are temporarily connected by connectors to form a first assembly, and the middle beam and the corresponding outer side beams are temporarily connected to form a second assembly. During the erection, the first assembly is erected first, and then the second assembly of the left and right spans of the bridge is erected by moving the bridge erecting machine along the transverse track.

2. The installation method of the large-span steel-concrete composite beam bridge erection machine applicable to confined spaces as described in claim 1, characterized in that, The method for erecting the first assembly is as follows: First, the first assembly is transported to the vicinity of the preset installation position by a beam transport vehicle, and then the first assembly is connected to the overhead crane. Subsequently, the first assembly is lowered to the preset installation position by the movement of the bridge erecting machine's crossbeam along the longitudinal beam, the movement of the overhead crane along the bridge erecting machine's crossbeam, and the lifting action of the overhead crane, so that the two inner side beams of the first assembly fall on the cap beams of the left and right spans of the beam respectively.

3. The installation method of the large-span steel-concrete composite beam bridge erection machine applicable to confined spaces as described in claim 2, characterized in that, The method for installing the second assembly is as follows: (1) After transporting the second assembly to the vicinity of the preset installation position of the middle beam by a beam transport vehicle, the second assembly is connected to the overhead crane; (2) The second assembly is lowered to the preset installation position of the middle beam by the movement of the crossbeam of the bridge erecting machine along the longitudinal beam, the movement of the gantry crane along the crossbeam of the bridge erecting machine, and the lifting action of the gantry crane. (3) Disconnect the middle beam from the gantry crane, keep the outer side beam connected to the gantry crane, and transport the beam body crossbeam connecting the middle beam and the corresponding inner side beam to the location using a beam transport vehicle and hoisting device for installation; (4) Release the temporary connection between the outer side beam and the middle beam, and lift the outer side beam to the designed beam placement position by moving the gantry crane along the crossbeam of the bridge erecting machine and by lifting the gantry crane. (5) After the outer side beam reaches the designed beam placement position, continue to maintain the connection between the outer side beam and the overhead crane, and install the beam crossbeam connecting the outer side beam and the corresponding middle beam through the beam transport vehicle and hoisting device; (6) Disconnect the outer side beam from the overhead crane and complete the installation of the second assembly of one of the beams; (7) Drive the bridge erecting machine to move along the transverse track to the installation position of another beam, repeat steps (1)-(6) to complete the installation of the second assembly of the other beam.

4. The installation method of the large-span steel-concrete composite beam bridge erection machine applicable to confined spaces as described in claim 3, characterized in that, Both the first assembly and the second assembly are connected to the overhead crane via a lifting device.

5. The installation method of the large-span steel-concrete composite beam bridge erection machine applicable to confined spaces as described in claim 4, characterized in that, The middle beam and the outer side beam of the second assembly are both connected to the lifting device by steel wire ropes.

6. The installation method of the large-span steel-concrete composite beam bridge erection machine applicable to confined spaces as described in claim 4, characterized in that, After disconnecting the middle beam from the overhead crane in step (3), 1-2 temporary lifting points are set on the outer side beam. The temporary lifting points are connected to the lifting device by steel wire rope.

Images