A precast inverted arch bridge erector and its usage method

Abstract

A prefabricated inverted arch bridge erection machine includes a hoisting support, a prefabricated inverted arch hoisting trolley movable on the hoisting support, and a bridge body arranged in the front-rear direction. The front end of the bridge body is hinged to the front end of the hoisting support, and a swing driving member for driving the bridge body to swing up and down is provided on the hoisting support. Its usage method includes the following steps: S1. Before the prefabricated inverted arch constructed in the previous process fails to bear weight, the bridge body is used as a vehicle passing channel; S2. The transport vehicle transports the prefabricated inverted arch to be hoisted to the lower part of the rear end of the hoisting support, and the swing driving member drives the bridge body to swing upward to make way for the construction position of the next process; S3. The prefabricated inverted arch hoisting trolley hoists each prefabricated inverted arch to be hoisted to the corresponding installation position; S4. The swing driving member drives the bridge body to swing downward until the rear end is erected on the prefabricated inverted arch that can bear weight, and the bridge body is used as a vehicle passing channel. The structure of the present invention is simple, multiple prefabricated inverted arches can be installed at one time, and vehicles can pass in time, improving the construction efficiency.

Description

Technical Field

[0001] The present invention relates to tunnel construction equipment and its usage method, and in particular to a precast invert bridging machine and its usage method. Background Art

[0002] Currently, for the precast invert assembly scheme in tunnels, mainly cantilever lifting equipment is used. The defects of this type of equipment are: 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 in time. In tunnel excavation construction, if timely passage can be satisfied, 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 bridging machine with a simple structure, which can install multiple precast inverts at one time, allows vehicles to pass in time, and is beneficial to improving the construction efficiency.

[0004] The present invention further provides a usage method of the above precast invert bridging machine.

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

[0006] A precast invert bridging machine includes a hoisting support, a precast invert hoisting trolley movable on the hoisting support, and a bridge body arranged in the front-rear direction. The front end of the bridge body is hinged to the front end of the hoisting support, and a swing driving member for driving the bridge body to swing up and down is provided on the hoisting support.

[0007] As a further improvement of the above technical solution: a telescopic support leg is provided at the front end of the hoisting support, and the front end of the bridge body is hinged to the lower part of the telescopic support leg.

[0008] As a further improvement of the above technical solution: traveling mechanisms are provided at both ends of the hoisting support.

[0009] As a further improvement of the above technical solution: a longitudinal guide rail is provided on the hoisting support. The precast invert hoisting trolley includes a longitudinal movement mechanism arranged on the longitudinal guide rail, 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.

[0010] As a further improvement of the above technical solution: the hoisting component is rotatably connected to the transverse movement mechanism.

[0011] As a further improvement of the above technical solution: a downwardly inclined transition bridge is further provided at the front end of the hoisting support, and the rear end of the transition bridge is docked with the front end of the bridge body.

[0012] As a further improvement of the above technical solution: the transition bridge is hinged to the hoisting bracket.

[0013] As a further improvement of the above technical solution: the bridge body includes at least two segments, and adjacent segments are hinged and provided with folding driving members.

[0014] As a further improvement of the above technical solution: the bridge body includes at least two segments, and adjacent segments are slidably butted and provided with folding driving members.

[0015] A method for using the above precast invert bridging machine 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 transport vehicle transports the precast invert to be hoisted to the lower part of the rear end of the hoisting bracket, and the swing driving member drives the bridge body to swing upward to make way for the construction position of the next process.

[0018] S3. The precast invert hoisting trolley hoists each precast invert to be hoisted to the corresponding installation position.

[0019] S4. The swing driving member drives the bridge body to swing downward until the rear end is placed on the precast invert that can bear weight, and 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 bridging machine disclosed by the present invention, a precast invert hoisting trolley is provided on the hoisting bracket, and the front end of the hoisting bracket is hinged to the front end of the bridge body, and the bridge body is driven to swing up and down by a swing driving member. When the bridge body swings upward to make way for the construction position of the next process, the precast invert hoisting trolley can hoist all the precast inverts of the current process from the transport vehicle to the position to be installed, and then the construction personnel complete the installation. Before the precast invert can bear weight, the bridge body swings downward and the rear end is lapped on the precast invert that can bear weight. In this state, vehicles can pass through the bridge body. The structure is simple and can meet the timely passage needs of vehicles, thus greatly improving the construction efficiency.

[0021] For the method for using the precast invert bridging machine disclosed by the present invention, after the bridge body swings upward to make way for the construction position of the next process, all the precast inverts of the current process can be hoisted from the transport vehicle to the position to be installed, and then the construction personnel complete the installation. Before the precast invert can bear weight, the bridge body swings downward and the rear end is lapped on the precast invert 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. Description of the Drawings

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

[0023] Figure 2 It is a schematic structural view of the end face of the precast inverted arch bridge erecting machine of the present invention.

[0024] Figure 3 It is a schematic flow chart of the usage method of the precast inverted arch bridge erecting machine of the present invention.

[0025] In the figure, each label indicates: 1. Bridge body; 11. Segments; 12. Transition bridge; 13. Folding driving member; 2. Precast inverted arch hoisting trolley; 21. Longitudinal moving mechanism; 22. Transverse guide rail; 23. Transverse moving mechanism; 24. Hoisting component; 3. Hoisting support; 31. Telescopic support leg; 32. Traveling mechanism; 33. Longitudinal guide rail; 4. Precast inverted arch; 5. Swing driving member. Specific embodiments

[0026] As shown in this section and the claims, unless the context clearly indicates otherwise, words such as "a", "an", "one" and / or "the" are not specifically singular and may also include plural. The terms "first", "second" and similar terms used in this section do not denote 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 "connected" and similar terms are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0027] The present invention will be further described in detail below in conjunction with the specification drawings and specific embodiments.

[0028] Embodiment 1

[0029] As Figure 1 and Figure 2As shown in the figure, the precast inverted arch bridge erector of this embodiment includes a hoisting support 3, a precast inverted arch hoisting trolley 2 that can move on the hoisting support 3, and a bridge body 1 arranged in the front-rear direction. The front end of the bridge body 1 is hinged to the lower part of the front end of the hoisting support 3, and a swing drive member 5 for driving the bridge body 1 to swing up and down is provided on the hoisting support 3. It should be noted that the longitudinal direction and the front-rear direction are the length direction of the tunnel. Correspondingly, the transverse direction and the left-right direction are the width direction of the tunnel. The end of the bridge body 1 close to the excavation area is the front end. Correspondingly, the end of the bridge body 1 close to the precast inverted arch 4 that has been installed is the rear end. 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. The swing drive member 5 can be of various types, such as an oil cylinder, an electric push rod, or a steel cable, etc., as long as it can drive the bridge body 1 to swing up and down, which will not be elaborated here.

[0030] In the precast inverted arch bridge erector of this embodiment, a precast inverted arch hoisting trolley 2 is provided on the hoisting support 3, and the lower part of the front end is hinged to the front end of the bridge body 1. The bridge body 1 is driven to swing up and down by the swing drive member 5. When the bridge body 1 swings upward to vacate the construction position for the next process, at this time, 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 installation position to be installed, and then the construction personnel complete the installation; before the precast inverted arch 4 can bear the load, the bridge body 1 swings downward and the rear end is lapped on the precast inverted arch 4 that can bear the load. In this state, vehicles can pass through the bridge body 1. The structure is simple and can meet the timely passage needs of vehicles, thus greatly improving the construction efficiency.

[0031] Furthermore, in this embodiment, a telescopic support leg 31 is provided at the front end of the hoisting support 3, and the front end of the bridge body 1 is hinged to the lower part of the telescopic support leg 31. The use of the telescopic support leg 31 at the front end can adapt to situations such as uneven ground, overexcavation, or under excavation. The structure is simple and reasonable. There are various ways of telescoping the telescopic support leg 31, such as including multiple sections of sleeves, slide rails, etc. The adjacent two sections are sleeved and slidably docked, and are driven to telescope by an oil cylinder, an electric push rod, etc., which will not be elaborated here.

[0032] Furthermore, in this embodiment, traveling mechanisms 32 are provided at both ends of the hoisting support 3. After the construction of the current process is completed, the traveling mechanisms 32 can independently drive the hoisting support 3 to move forward, making it more convenient to use. Among them, the traveling mechanisms 32 can be, for example, rubber wheels, wheel boxes, and / or crawler mechanisms, etc., which will not be elaborated here.

[0033] Furthermore, in this embodiment, a longitudinal guide rail 33 is provided on the lifting bracket 3, and the prefabricated inverted arch lifting trolley 2 comprises a longitudinal movement mechanism 21 provided on the longitudinal guide rail 33, 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 lifting 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 lifting component 24 and the prefabricated inverted arch 4 lifted by it to move in the transverse direction to adjust the position. Correspondingly, when the longitudinal movement mechanism 21 moves along the longitudinal guide rail 33, it can drive the transverse guide rail 22, the transverse movement mechanism 23, the lifting component 24 and the prefabricated inverted arch 4 lifted by it to move in the longitudinal direction to adjust the position, so that the prefabricated inverted arch 4 can be accurately lifted from the transport vehicle to the corresponding installation position, and the structure is simple, reliable, and the lifting is convenient.

[0034] Furthermore, in this embodiment, the hoisting component 24 is rotatably connected to the lateral movement mechanism 23. Specifically, the construction personnel can manually rotate the hoisting component 24 or the hoisted prefabricated inverted arch 4, or the driving component (such as a rotary cylinder, a motor, etc.) can actively drive the hoisting component 24 to rotate. When the placement direction of the prefabricated inverted arch 4 on the transport vehicle is perpendicular to the installation direction, it can be rotated after hoisting, which is convenient for subsequent installation, and the structure is simple and reasonable.

[0035] Furthermore, in this embodiment, a downwardly inclined transition bridge 12 is also provided at the front end of the lifting bracket 3, and the rear end of the transition bridge 12 is connected to the front end of the bridge body 1. The transition bridge 12 can eliminate the height difference between the bridge body 1 and the front excavation area, making it convenient for vehicles to smoothly get on and off the bridge body 1, and the structure is simple and reliable.

[0036] Furthermore, in the present embodiment, the transition bridge 12 is hinged to the lifting bracket 3. On the one hand, it is convenient to adjust the inclination angle of the transition bridge 12 to improve adaptability. On the other hand, when the equipment needs to move forward to the next process, the transition bridge 12 can be lifted upward to avoid interference. The structure is simple and reasonable, and it is more convenient to use.

[0037] Furthermore, in this embodiment, the bridge body 1 includes at least two sections 11, and adjacent sections 11 are hinged and equipped with folding driving members 13 (such as oil cylinders, air cylinders or electric push rods, etc.). Since the height of the tunnel is limited, in order to meet the length requirements of the construction section, the length of the bridge body 1 may be greater than the height of the tunnel. In this case, the bridge body 1 cannot swing upward to a vertical state, which may affect the lifting of the prefabricated invert 4. For this reason, the bridge body 1 of this embodiment can be folded by rotation under the action of the folding driving member 13 to achieve the purpose of swinging to a vertical state, and the structure is simple and effective.

[0038] Of course, in other embodiments, the segments 11 of the bridge body 1 can also be slidably butted, and under the action of the folding driving member 13, it can be folded by sliding, and it can also achieve the purpose of swinging to the vertical state, with a simple and effective structure.

[0039] Embodiment 2

[0040] Figure 3 An embodiment showing the use method of the precast inverted arch bridge erector of the present invention is presented. The use method of the precast inverted arch bridge erector in this embodiment includes the following steps:

[0041] S1. Before the precast inverted arch 4 constructed in the previous process can bear weight, the bridge body 1 is used as a vehicle passage. Specifically, refer to Figure 3 a. At this time, the front end of the transition bridge 12 is erected on the front excavation area, and the rear end of the bridge body 1 is erected on the precast inverted arch 4 that can bear weight;

[0042] S2. The transport vehicle transports the precast inverted arch 4 to be hoisted to below the rear end of the hoisting support 3, and the bridge body 1 swings upward and folds up to make way for the construction position of the next process. Specifically, refer to Figure 3 b;

[0043] S3. The precast inverted arch hoisting trolley 2 hoists each precast inverted arch 4 to be hoisted to the corresponding installation position. Specifically, refer to Figure 3 c to Figure 3 e. The hoisting process specifically includes the precast inverted arch 4 rising, rotating 90° to the installation angle, then finely adjusting the position by moving longitudinally and transversely, and finally descending to the required installation position. After that, the construction personnel complete the installation of the precast inverted arch 4, and the precast inverted arch hoisting trolley 2 resets. In this way, the installation of all the precast inverted arches 4 in the current process is completed in a cycle;

[0044] S4. The bridge body 1 swings downward and unfolds until the rear end is erected on the precast inverted arch 4 that can bear weight, and the bridge body 1 is used as a vehicle passage. Specifically, refer to Figure 3 f. At this time, the rear end of the bridge body 1 is erected on the precast inverted arch 4 that can bear weight at the frontmost.

[0045] By constructing in a cycle according to the above steps, the installation of the entire tunnel precast inverted arch 4 can be completed efficiently.

[0046] In the use method of the precast inverted arch bridge erector in this embodiment, after the bridge body 1 swings upward to make way for the construction position of the next process, all the precast inverted arches 4 in the current process can be hoisted from the transport vehicle to the position to be installed, and the subsequent installation is completed by the construction personnel; before the precast inverted arch 4 can bear weight, the bridge body 1 swings downward and the rear end is lapped 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 passage needs of vehicles, thus greatly improving the construction efficiency.

[0047] Although the present invention has been disclosed above in 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, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of 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 hoisting support (3), a precast inverted arch hoisting trolley (2) that can move on the hoisting support (3), and a bridge body (1) arranged in the front-back direction. The front end of the bridge body (1) is hinged to the front end of the hoisting support (3), and a swing driving member (5) for driving the bridge body (1) to swing up and down is provided on the hoisting support (3).

2. The precast inverted arch bridge erecting machine according to claim 1, wherein: The front end of the hoisting support (3) is provided with a telescopic support leg (31), and the front end of the bridge body (1) is hinged to the lower part of the telescopic support leg (31).

3. The precast inverted arch bridge erecting machine according to claim 1, wherein: Traveling mechanisms (32) are provided at both ends of the hoisting support (3).

4. The precast inverted arch bridge erector according to claim 1, characterized in that: A longitudinal guide rail (33) is provided on the hoisting support (3). The precast inverted arch hoisting trolley (2) includes a longitudinal movement mechanism (21) arranged on the longitudinal guide rail (33), 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).

5. The precast inverted arch bridge erector according to claim 4, characterized in that: The hoisting component (24) is rotatably connected to the transverse movement mechanism (23).

6. The precast inverted arch bridge erecting machine according to any one of claims 1 to 5, characterized in that: A downwardly inclined transition bridge (12) is further provided at the front end of the hoisting support (3), and the rear end of the transition bridge (12) is butted against the front end of the bridge body (1).

7. The precast inverted arch bridge erector according to claim 6, characterized in that: The transition bridge (12) is hinged to the hoisting support (3).

8. The precast inverted arch bridge erecting machine according to any one of claims 1 to 5, characterized in that: The bridge body (1) includes at least two segments (11), and adjacent segments (11) are hinged to each other and are provided with a folding driving member (13).

9. The precast inverted arch bridge erecting machine according to any one of claims 1 to 5, characterized in that: The bridge body (1) includes at least two segments (11), and adjacent segments (11) are slidably butted against each other and are provided with a folding driving member (13).

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 can bear weight, the bridge body (1) is used as a vehicle passage; S2. The transport vehicle transports the precast inverted arch (4) to be hoisted to below the rear end of the hoisting support (3), and the swing driving member (5) drives the bridge body (1) to swing upward to vacate the construction position for the next process; S3. The precast inverted arch hoisting trolley (2) hoists each precast inverted arch (4) to be hoisted to the corresponding installation position; S4. The swing driving member (5) drives the bridge body (1) to swing downward until the rear end is placed on the precast inverted arch (4) that can bear weight, and the bridge body (1) is used as a vehicle passage.

Images