Prefabricated inverted arch bridge erector and its using method

Abstract

A precast inverted arch bridge erection machine includes a first support mechanism, a precast inverted arch hoisting trolley, a hoisting support, and a bridge body arranged longitudinally. The bridge body is liftably arranged on the first support mechanism. The hoisting support is provided with longitudinal guide rails on both longitudinal sides of the first support mechanism, and at least one side of the longitudinal guide rails can reciprocate. The precast inverted arch hoisting trolley is arranged on the longitudinal guide rails. Its usage method: S1. Before the precast inverted arch constructed in the previous process fails to bear weight, the bridge body is used as a vehicle passage; S2. The bridge body rises along the first support mechanism, passes through the gap between the two longitudinal guide rails on both sides, and then reaches above the hoisting support, and the longitudinal guide rails on both sides are butted; S3. The precast inverted arch hoisting trolley hoists each precast inverted arch to be hoisted to the corresponding installation position; S4. The longitudinal guide rails on both sides are separated, and the bridge body descends and is used as a vehicle passage. The structure of the present invention is simple, multiple precast inverted arches can be installed at one time, and vehicles can pass in time, which is beneficial to improving the construction efficiency.

Description

Technical Field

[0001] The present invention relates to tunnel construction equipment and its usage method, and particularly to a precast invert bridge erector and its usage method. Background Art

[0002] At present, for the precast invert assembly scheme in tunnels, cantilever lifting equipment is mainly used. The defects of this type of equipment are as follows: it cannot install multiple blocks at one time, and after the precast invert is assembled, due to the need for grouting and other construction below, vehicles cannot pass through in time. In tunnel excavation construction, if timely passage can be achieved, the construction efficiency can be greatly improved. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a precast invert bridge erector with a simple structure, which can install multiple precast inverts at one time, allows vehicles to pass through in time, and is beneficial to improving construction efficiency.

[0004] The present invention further provides a usage method for the above-mentioned precast invert bridge erector.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A precast invert bridge erector includes a first support mechanism, a precast invert hoisting trolley, a hoisting bracket provided on the first support mechanism, and a bridge body arranged longitudinally. The bridge body is arranged on the first support mechanism in a liftable manner. The hoisting bracket is provided with longitudinal guide rails on both longitudinal sides of the first support mechanism, and at least one side of the longitudinal guide rails can reciprocate. The precast invert hoisting trolley is arranged on the longitudinal guide rails.

[0007] As a further improvement of the above technical solution: The first support mechanism includes lifting guide columns arranged on both transverse sides of the bridge body. The hoisting bracket is connected to the outside of the lifting guide columns, and the longitudinal guide rails are located inside the lifting guide columns.

[0008] As a further improvement of the above technical solution: A second support mechanism is provided at the rear end of the hoisting bracket, and a counterweight component is provided on the second support mechanism.

[0009] As a further improvement of the above technical solution: Both the first support mechanism and the second support mechanism are provided with traveling mechanisms.

[0010] As a further improvement of the above technical solution: The precast invert hoisting trolley includes a longitudinal movement mechanism arranged on the longitudinal guide rails, a transverse guide rail arranged on the longitudinal movement mechanism, a transverse movement mechanism arranged on the transverse guide rail, and a hoisting component arranged on the transverse movement mechanism.

[0011] As a further improvement of the above technical solution: The hoisting component is rotatably connected to the transverse movement mechanism.

[0012] As a further improvement of the above technical solution: The bridge body includes a main bridge and transition bridges provided at both ends of the main bridge and inclined downward. The main bridge is liftably provided on the first support mechanism.

[0013] As a further improvement of the above technical solution: The transition bridge is hinged to the main bridge, and a swing driving member for driving the transition bridge to swing up and down is provided on the main bridge.

[0014] As a further improvement of the above technical solution: The longitudinal guide rail on one side of the first support mechanism can reciprocate longitudinally, can telescopically extend or retract longitudinally, or can swing up and down.

[0015] A method for using the above precast invert bridge erector includes the following steps:

[0016] S1. Before the precast invert constructed in the previous process can bear weight, the bridge body is used as a vehicle passage.

[0017] S2. The bridge body rises along the first support mechanism and passes through the gap between the longitudinal guide rails on both sides, then reaches above the hoisting bracket, and then at least one side of the longitudinal guide rail moves to dock with the longitudinal guide rail on the other side.

[0018] S3. The precast invert hoisting trolley moves along the longitudinal guide rail to hoist each precast invert to be hoisted to the corresponding installation position.

[0019] S4. At least one side of the longitudinal guide rail moves to separate from the longitudinal guide rail on the other side. The bridge body descends along the first support mechanism, passes through the gap between the longitudinal guide rails on both sides, and then resets. The bridge body is used as a vehicle passage.

[0020] Compared with the prior art, the advantages of the present invention are as follows: For the precast invert bridge erector disclosed in the present invention, the bridge body and the hoisting bracket are supported by the first support mechanism, and the bridge body can be lifted along the first support mechanism. Longitudinal guide rails are respectively arranged on the longitudinal two sides of the first support mechanism for the hoisting bracket, and at least one side of the longitudinal guide rail can reciprocate, so that the longitudinal guide rails on both sides can be docked or separated. When the longitudinal guide rails on both sides are in a separated state, the bridge body can pass through the gap between the longitudinal guide rails and rise above the hoisting bracket, avoiding affecting the subsequent hoisting of the precast invert by the precast invert hoisting trolley. Then the guide rails on both sides are docked, and the precast invert hoisting trolley can reciprocate along the longitudinal guide rail for hoisting. After the hoisting of the precast invert in the current process is completed, the longitudinal guide rails on both sides return to the separated state again for the bridge body to pass through. The bridge body descends along the first support mechanism and resets. At this time, vehicles can pass on the bridge body. The structure is simple, and it can meet the timely passage needs of vehicles, thus greatly improving the construction efficiency.

[0021] The usage method of the precast inverted arch bridge erecting machine disclosed by the present invention is as follows: after the bridge body rises along the first support mechanism, the longitudinal guide rails on both sides are butted, and the precast inverted arch hoisting trolley can hoist all the precast inverted arches of the current process from the transport vehicle to the position to be installed, and then the subsequent installation is completed by the construction personnel; before the lower precast inverted arch can bear weight, the longitudinal guide rails on both sides are separated, and the bridge body descends and resets along the first support mechanism, so that the rear end is erected on the precast inverted arch that can bear weight. In this state, vehicles can pass through the bridge body. The operation is simple and can meet the timely passage needs of vehicles, thus greatly improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the front view structural schematic diagram of the precast inverted arch bridge erecting machine of the present invention.

[0023] Figure 2 is the side view structural schematic diagram of the precast inverted arch bridge erecting machine of the present invention.

[0024] Figure 3 is the top view structural view of the precast inverted arch bridge erecting machine of the present invention.

[0025] Figure 4 is the process schematic diagram of the usage method of the precast inverted arch bridge erecting machine of the present invention.

[0026] Each reference numeral in the figure represents: 1. Bridge body; 11. Main bridge; 12. Transition bridge; 13. Swing driving member; 2. Precast inverted arch hoisting trolley; 21. Longitudinal moving mechanism; 22. Transverse guide rail; 23. Transverse moving mechanism; 24. Hoisting component; 3. First support mechanism; 31. Lifting guide column; 4. Precast inverted arch; 5. Hoisting bracket; 51. Longitudinal guide rail; 6. Second support mechanism; 61. Counterweight component; 7. Traveling mechanism. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] As shown in this part and the claims, unless the context clearly indicates an exceptional situation, words such as "a", "an", "one" and / or "the" are not specifically singular and may also include plural. The words "first", "second" and similar words used in this part do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "comprising" or "including" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connection" or "coupling" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0028] The following further describes the present invention in detail with reference to the accompanying drawings of the specification and specific embodiments.

[0029] Embodiment 1

[0030] As shown Figures 1 to 3 in the figure, the precast inverted arch bridge erecting machine of this embodiment includes a first support mechanism 3, a precast inverted arch hoisting trolley 2, a hoisting bracket 5 provided on the first support mechanism 3, and a bridge body 1 arranged longitudinally. The bridge body 1 is arranged on the first support mechanism 3 in a liftable manner. The hoisting bracket 5 is provided with longitudinal guide rails 51 on both longitudinal sides of the first support mechanism 3, and the front longitudinal guide rail 51 can move longitudinally (of course, in other embodiments, it can also be the rear longitudinal guide rail 51 that can move longitudinally; the longitudinal guide rails 51 can also have other reciprocating motion modes, such as longitudinal telescopic type or up-and-down swing type, which can all achieve the docking or separation between the two longitudinal guide rails 51). The precast inverted arch hoisting trolley 2 is arranged on the longitudinal guide rails 51. It should be noted that the longitudinal direction is the length direction of the tunnel. Correspondingly, the transverse direction is the width direction of the tunnel. One end of the bridge body 1 close to the excavation area is the front end. Correspondingly, one end of the bridge body 1 close to the precast inverted arch 4 that has been installed is the rear end. There are various ways for the bridge body 1 to lift along the first support mechanism 3, such as the telescopic movement of a hydraulic cylinder in the vertical direction, the walking of an electric motor in the vertical direction, the reciprocating movement of a gear along a rack, or the reciprocating operation of a chain mechanism, etc., which will not be elaborated here; the method of the precast inverted arch hoisting trolley 2 hoisting the precast inverted arch 4 is the same as the existing hoisting method, such as a hook cooperating with a sling, a steel cable, etc., which will not be elaborated here.

[0031] For the precast inverted arch bridge erecting machine of this embodiment, the bridge body 1 and the hoisting bracket 5 are supported by the first support mechanism 3, and the bridge body 1 can lift along the first support mechanism 3. The hoisting bracket 5 is respectively provided with longitudinal guide rails 51 on both longitudinal sides of the first support mechanism 3, and at least one side of the longitudinal guide rails 51 can move longitudinally. When the two longitudinal guide rails 51 are in a separated state, the bridge body 1 can pass through the gap between the longitudinal guide rails 51 and rise above the hoisting bracket 5 to avoid affecting the subsequent hoisting of the precast inverted arch 4 by the precast inverted arch hoisting trolley 2. Then, the two longitudinal guide rails 51 are docked, and the precast inverted arch hoisting trolley 2 can move reciprocally along the longitudinal guide rails 51 for hoisting; after the hoisting of the precast inverted arch 4 in the current process is completed, the two longitudinal guide rails 51 are separated again for the bridge body 1 to pass through. The bridge body 1 descends and resets along the first support mechanism 3, so that the rear end is placed on the load-bearing precast inverted arch 4. At this time, vehicles can pass through the bridge body 1. The structure is simple and can meet the timely passing needs of vehicles, thus greatly improving the construction efficiency.

[0032] Furthermore, in this embodiment, the first support mechanism 3 includes lifting guide columns 31 provided on the transverse sides of the bridge body 1. The hoisting bracket 5 is connected to the outside of the lifting guide columns 31, and the longitudinal guide rail 51 is located inside the lifting guide columns 31. The lifting guide columns 31 can provide guiding for the lifting movement of the bridge body 1, ensuring a smooth movement process and high movement accuracy. The hoisting bracket 5 located outside the lifting guide columns 31 and the longitudinally movable longitudinal guide rail 51 will not interfere with the lifting movement of the bridge body 1. The structure is simple, has good symmetry, and good static and dynamic force balance.

[0033] Furthermore, in this embodiment, a second support mechanism 6 is provided at the rear end of the hoisting bracket 5, and a counterweight member 61 (such as a common counterweight block, etc.) is provided on the second support mechanism 6. The first support mechanism 3 and the second support mechanism 6 can provide effective support for the hoisting bracket 5, etc. Especially when the precast inverted arch hoisting trolley 2 hoists the precast inverted arch 4 and moves it to the front end of the hoisting bracket 5, the counterweight member 61 is beneficial to ensure the safe and stable operation of the equipment.

[0034] As a preferred embodiment, the first support mechanism 3 and the second support mechanism 6 are both provided with traveling mechanisms 7 (such as rubber wheels, wheel boxes or track mechanisms, etc., which will not be elaborated). After the construction at the current position is completed, the traveling mechanism 7 can drive the whole equipment to move to the next construction position, making it more convenient to use.

[0035] Furthermore, in this embodiment, the precast inverted arch hoisting trolley 2 includes a longitudinal movement mechanism 21 provided on the longitudinal guide rail 51, a transverse guide rail 22 provided on the longitudinal movement mechanism 21, a transverse movement mechanism 23 provided on the transverse guide rail 22, and a hoisting component 24 provided on the transverse movement mechanism 23. When the transverse movement mechanism 23 moves along the transverse guide rail 22, it can drive the hoisting component 24 and the precast inverted arch 4 it hoists to move horizontally to adjust the position. Correspondingly, when the longitudinal movement mechanism 21 moves along the longitudinal guide rail 51, it can drive the transverse guide rail 22, the transverse movement mechanism 23, the hoisting component 24 and the precast inverted arch 4 it hoists to move longitudinally to adjust the position, so as to accurately hoist the precast inverted arch 4 from the transport vehicle to the corresponding installation position. The structure is simple and reliable, and the hoisting is convenient.

[0036] Even further, in this embodiment, the hoisting component 24 is rotatably connected to the transverse movement mechanism 23. Specifically, it can be that the construction personnel manually rotate the hoisting component 24 or the precast inverted arch 4 being hoisted, or the driving component (such as a rotary oil cylinder, motor) actively drives the hoisting component 24 to rotate. When the placement direction of the precast inverted arch 4 on the transport vehicle is perpendicular to the installation direction, it can be rotated after being lifted, which is convenient for subsequent installation. The structure is simple and reasonable.

[0037] Further, in this embodiment, the bridge body 1 includes a main bridge 11 and transition bridges 12 disposed at both ends of the main bridge 11 and inclined downward. The main bridge 11 is liftably disposed on the first support mechanism 3. The transition bridges 12 can eliminate the height difference at both ends of the main bridge 11, facilitating the smooth movement of vehicles onto and off the main bridge 11, with a simple and reliable structure.

[0038] Furthermore, in this embodiment, the transition bridges 12 are hinged to the main bridge 11, and a swing driving member 13 (such as an oil cylinder, a cylinder, or an electric push rod, etc., which will not be elaborated further) for driving the transition bridges 12 to swing up and down is provided on the main bridge 11. On the one hand, it is convenient to adjust the inclination angle of the transition bridges 12 to improve adaptability. On the other hand, when the bridge body 1 needs to move forward to the next process, the transition bridges 12 can be lifted upward to avoid interference, with a simple and reasonable structure.

[0039] Embodiment Two

[0040] Figure 4 An embodiment showing a usage method of the precast invert bridging machine of the present invention is presented. The usage method of the precast invert bridging machine in this embodiment includes the following steps:

[0041] S1. Before the precast invert 4 constructed in the previous process can bear weight, the bridge body 1 is used as a vehicle passage. Specifically, refer to Figure 4 a in the figure. The front end of the bridge body 1 is erected on the front excavation area, and the rear end is erected on the precast invert 4 that has completed curing and can bear weight;

[0042] S2. The bridge body 1 rises along the first support mechanism 3 and passes through the gap between the two side longitudinal guide rails 51 to reach above the lifting support 5. At this time, the transport vehicle can transport the precast invert 4 to be lifted to the lower part behind the lifting support 5, and then the front longitudinal guide rail 51 moves longitudinally to dock with the rear longitudinal guide rail 51. Specifically, refer to Figure 4 b in the figure;

[0043] S3. The precast invert lifting trolley 2 moves along the longitudinal guide rail 51 to lift each precast invert 4 to the corresponding installation position. Refer to Figure 4 c in the figure to Figure 4 f in the figure. Specifically, it includes the precast invert 4 rising, rotating 90° to the installation angle, then moving longitudinally and transversely to fine-tune the position, and finally descending to the required installation position. After that, the construction personnel complete the installation of the precast invert 4, and the precast invert lifting trolley 2 resets. In this way, the installation of all precast inverts 4 in the current process is completed in a cycle;

[0044] S4. The front longitudinal guide rail 51 moves longitudinally to separate from the rear longitudinal guide rail 51. The bridge body 1 descends along the first support mechanism 3 and passes through the gap between the two side longitudinal guide rails 51 and then resets. Specifically, the rear end is erected on the precast invert 4 that can bear weight, and the bridge body 1 is used as a vehicle passage, as shown in Figure 4as shown in g.

[0045] By performing cyclic construction according to the above steps, the installation of the entire precast inverted arch 4 of the tunnel can be completed efficiently.

[0046] For the usage method of the precast inverted arch bridge erector in this embodiment, after the bridge body 1 rises along the first support mechanism 3, the longitudinal guide rails 51 on both sides are butted. The precast inverted arch hoisting trolley 2 can hoist all the precast inverted arches 4 of the current process from the transport vehicle to the position to be installed, and then the subsequent installation is completed by the construction personnel; before the precast inverted arch 4 under the bridge body 1 can bear weight, the longitudinal guide rails 51 on both sides are separated, and the bridge body 1 descends and resets along the first support mechanism 3, so that the rear end is placed on the precast inverted arch 4 that can bear weight. In this state, vehicles can pass through the bridge body 1. The operation is simple and can meet the timely passing needs of vehicles, thus greatly improving the construction efficiency.

[0047] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the above-disclosed technical content, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A precast inverted arch bridge erector, characterized in that: It includes a first support mechanism (3), a precast inverted arch hoisting trolley (2), a hoisting bracket (5) provided on the first support mechanism (3), and a bridge body (1) arranged longitudinally. The bridge body (1) is arranged on the first support mechanism (3) in a liftable manner. The hoisting bracket (5) is provided with longitudinal guide rails (51) on both longitudinal sides of the first support mechanism (3), and at least one side of the longitudinal guide rails (51) can reciprocate, and the precast inverted arch hoisting trolley (2) is arranged on the longitudinal guide rails (51).

2. The precast inverted arch bridge erecting machine according to claim 1, wherein: The first support mechanism (3) includes lift guide columns (31) provided on both transverse sides of the bridge body (1). The hoisting bracket (5) is connected to the outside of the lift guide columns (31), and the longitudinal guide rails (51) are located inside the lift guide columns (31).

3. The precast inverted arch bridge erecting machine according to claim 1, wherein: A second support mechanism (6) is provided at the rear end of the hoisting bracket (5), and a counterweight component (61) is provided on the second support mechanism (6).

4. The precast inverted arch bridge erecting machine according to claim 3, characterized in that: Both the first support mechanism (3) and the second support mechanism (6) are provided with traveling mechanisms (7).

5. The precast inverted arch bridge erecting machine according to claim 1, characterized in that: The precast inverted arch hoisting trolley (2) includes a longitudinal movement mechanism (21) arranged on the longitudinal guide rails (51), a transverse guide rail (22) arranged on the longitudinal movement mechanism (21), a transverse movement mechanism (23) arranged on the transverse guide rail (22), and a hoisting component (24) arranged on the transverse movement mechanism (23).

6. The precast inverted arch bridge erecting machine according to claim 5, characterized in that: The hoisting component (24) is rotatably connected to the transverse movement mechanism (23).

7. The precast inverted arch bridge erecting machine according to any one of claims 1 to 6, characterized in that: The bridge body (1) includes a main bridge (11) and transition bridges (12) provided at both ends of the main bridge (11) and inclined downward. The main bridge (11) is arranged on the first support mechanism (3) in a liftable manner.

8. The precast inverted arch bridge erecting machine according to claim 7, characterized in that: The transition bridge (12) is hinged to the main bridge (11), and a swing driving member (13) for driving the transition bridge (12) to swing up and down is provided on the main bridge (11).

9. The precast inverted arch bridge erecting machine according to any one of claims 1 to 6, characterized in that: The longitudinal guide rail (51) on one side of the first support mechanism (3) can reciprocate longitudinally, or can be telescopic longitudinally, or can swing up and down.

10. A method for using a precast inverted arch bridge erector according to any one of claims 1 to 9, characterized in that: It includes the following steps: S1. Before the precast inverted arch (4) constructed in the previous process fails to bear weight, the bridge body (1) is used as a vehicle passage. S2. The bridge body (1) rises along the first support mechanism (3), passes through the gap between the longitudinal guide rails (51) on both sides, and reaches above the hoisting bracket (5). Then, at least one side of the longitudinal guide rail (51) moves to dock with the longitudinal guide rail (51) on the other side. S3. The precast inverted arch hoisting trolley (2) moves along the longitudinal guide rail (51) to hoist each precast inverted arch (4) to be hoisted to the corresponding installation position. S4. At least one side of the longitudinal guide rail (51) moves to separate from the longitudinal guide rail (51) on the other side. The bridge body (1) descends along the first support mechanism (3), passes through the gap between the longitudinal guide rails (51) on both sides, and then resets. The bridge body (1) is used as a vehicle passage.

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