CN215906582U - Piling type bridge girder erection machine - Google Patents

Abstract

The embodiment of the application provides a formula of piling bridge crane includes: bridge girder erection machine body, pile driver and luffing mechanism. The pile driver comprises a pile driving frame, and the amplitude variation mechanism comprises an amplitude variation support rod and an amplitude variation driving mechanism. The pile driving frame is rotationally connected to the bridge girder erection machine body, and the rotational connection position of the pile driving frame divides the pile driving frame into a first section and a second section along the axial direction of the pile driving frame. The first end of the amplitude-variable support rod is rotatably connected with the bridge girder erection machine body, the second end of the amplitude-variable support rod is rotatably connected with the first section of the pile driving frame, the rotating plane of the amplitude-variable support rod is parallel to the rotating plane of the pile driving frame, and the amplitude-variable driving mechanism drives the second end of the amplitude-variable support rod to move in the first section along the axial direction of the pile driving frame so as to realize the conversion of the rotating angle of the pile driving frame. When the amplitude variation driving mechanism drives the second end of the amplitude variation supporting rod to move towards the direction close to/away from the second section of the pile driving frame, the pile driving frame can be converted from the horizontal state/the vertical state into the vertical state/the horizontal state under the supporting effect of the amplitude variation supporting rod.

Description

Piling type bridge girder erection machine

Technical Field

The embodiment of the application relates to the technical field of road and bridge construction, in particular to a piling type bridge girder erection machine.

Background

The construction of the traffic tracks is the key point of the infrastructure construction of all countries at present, new road construction generally plans to pass through rivers and lakes or offshore areas, and the adoption of bridge construction is the key direction of the construction of the traffic tracks. Since it is inconvenient to cast the pier foundation in situ in rivers, lakes or offshore areas, the pile driver is generally used to directly drive the pipe piles into the ground to form the pier.

In order to facilitate the pile driver to work high above the ground, the pile driver is fixed on the bridge girder erection machine in the prior art, for example, chinese utility model patent with application number 201920636409.0 has just adopted this kind of structure, and in this patent, the pile driver is connected through the front end of free bearing and bridge girder erection machine, and pneumatic cylinder one end is supported at the bridge girder erection machine, and the other end is supported on the pile driver, through the flexible of pneumatic cylinder, realizes the change of pile driver from horizontal state to vertical state to realize the installation of precast tubular pile on the pile driver and the pile driving of pile driver.

The scheme can be realized by a hydraulic cylinder with the stroke of 10 meters or even 15 meters, and the conventional hydraulic cylinder is difficult to reach the stroke. Moreover, since the precast tubular pile has a large weight, if the state change of the pile driver is realized by using the expansion and support functions of the hydraulic cylinder, in order to reduce the load of the hydraulic cylinder, the hinged support needs to be connected to the middle upper part of the pile driving frame of the pile driver according to the lever principle, so that the length of the pile driving frame below the main beam of the bridge erecting machine is long in the process that the pile driver is turned to the vertical state, and the lower end of the pile driving frame easily interferes with the ground below, which results in that the pile driving scheme cannot be implemented.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, embodiments of the present application provide a pile-driving bridge girder erection machine, which overcomes or at least partially solves the problem that the pile driving scheme cannot be implemented due to the fact that the pile driving frame is located below the main girder of the bridge girder erection machine and has a long length, and the lower end of the pile driving frame easily interferes with the ground below.

According to this application embodiment provides a formula of piling bridging machine includes: the bridge girder erection machine comprises a bridge girder erection machine body, a pile driver and a luffing mechanism;

the pile driver comprises a pile driving frame;

the amplitude variation mechanism comprises an amplitude variation support rod and an amplitude variation driving mechanism;

the pile driving frame is rotationally connected with the bridge girder erection machine body, and the rotational connection position of the pile driving frame divides the pile driving frame into a first section and a second section along the axial direction of the pile driving frame; the first end of the amplitude-variable support rod is rotatably connected with the bridge girder erection machine body, the second end of the amplitude-variable support rod is rotatably connected with the first section of the pile driving frame, the rotating plane of the amplitude-variable support rod is parallel to the rotating plane of the pile driving frame, and the amplitude-variable driving mechanism drives the second end of the amplitude-variable support rod to move in the first section along the axial direction of the pile driving frame so as to realize the conversion of the rotating angle of the pile driving frame.

In an optional mode, when the amplitude variation driving mechanism drives the second end of the amplitude variation stay bar to move towards the direction close to the second section of the pile driving frame, the pile driving frame is converted from the horizontal state to the vertical state under the supporting action of the amplitude variation stay bar, and the second section is positioned below the bridge girder erection machine body; when the amplitude-variable driving mechanism drives the second end of the amplitude-variable support rod to move in the direction away from the second section of the pile driving frame, the pile driving frame is converted into a horizontal state from a vertical state.

In an alternative mode, the pile driving frame is provided with a slide way along the axial direction of the pile driving frame, the second end of the amplitude-variable stay rod is rotatably connected with a slide block, and the amplitude-variable stay rod slides in the slide way through the slide block so as to realize the axial movement of the second end of the amplitude-variable stay rod along the pile driving frame.

In an alternative mode, the amplitude-variable driving mechanism comprises a fixed pulley, a movable pulley, a traction rope and an amplitude-variable hoisting mechanism;

the variable-amplitude hoisting mechanism and the fixed pulley are both arranged on the bridge girder erection machine body, the movable pulley is arranged at the second end of the variable-amplitude support rod, the traction rope is wound between the fixed pulley and the movable pulley, one end of the traction rope is connected to the fixed pulley, and the other end of the traction rope is connected to the variable-amplitude hoisting mechanism;

the variable-amplitude winding mechanism adjusts the distance between the movable pulley and the fixed pulley by winding and unwinding the traction rope so as to drive the second end of the variable-amplitude support rod to move along the axial direction of the pile driving frame.

In an optional mode, the rotary connection part of the first end of the amplitude-variable stay rod and the bridge girder erection machine body, the rotary connection part of the second end of the amplitude-variable stay rod and the pile driving frame and the rotary connection part of the pile driving frame and the bridge girder erection machine body are in a triangular structure, and the triangular structure is used for controlling the stability of the pile driver.

In an optional mode, the rotary connection part of the first end of the amplitude-variable stay bar and the bridge girder erection machine body is lower than the rotary connection part of the pile driving frame and the bridge girder erection machine body, so that the amplitude-variable stay bar can still support the pile driving frame when the pile driving frame is in a horizontal state.

In an alternative mode, the bridge girder erection machine body comprises a main girder, a first supporting leg and a second supporting leg;

the length direction of the main beam is arranged along the extension direction of the bridge, the first support leg is positioned at the front end of the main beam, and the second support leg is positioned at the rear end of the main beam; the bridge extending direction is taken as the front of the main beam when the bridge girder erection machine is used for construction, and the reverse direction of the bridge extending direction is taken as the back of the main beam when the bridge girder erection machine is used for construction;

the pile driving frame is rotatably connected to the part of the main beam in front of the first support leg, and the amplitude-variable winding mechanism is arranged on the part of the main beam in back of the first support leg so as to reduce the downwarping of the front end of the main beam.

In an optional mode, the bridge girder erection machine body further comprises a supporting platform;

the supporting platform is positioned below the main beam and connected with the bottom of the main beam;

the first end of the amplitude-variable support rod is rotationally connected with the support platform and rotationally connected with the bridge girder erection machine body;

the pile driving frame is rotationally connected to the main beam and rotationally connected with the bridge girder erection machine body;

when the pile driving frame is in a vertical state, the amplitude-variable support rod and the support platform are both arranged on one side of the pile driving frame far away from the front end of the main beam, so that the downwarping of the front end of the main beam is reduced.

In an alternative form, the support platform is in a parallelogram configuration when viewed from the side of the main beam, the support platform including a strut connecting any two opposite corners of the parallelogram configuration.

In an optional mode, the bridge girder erection machine body further comprises a construction platform;

the construction platform is suspended below the main beam and used for bearing personnel and objects, so that the personnel can conveniently connect and cut the tubular pile.

The utility model provides a pair of pile formula bridging machine is through setting up the width of cloth vaulting pole and become width of cloth actuating mechanism to rotate the pile driver frame of pile driver and connect on the bridging machine body, rotate the first end that becomes the width of cloth vaulting pole and bridging machine body and be connected, the second end rotation that becomes the width of cloth vaulting pole connects in the first section of pile driver frame, becomes width of cloth actuating mechanism and can drive the second end that becomes the width of cloth vaulting pole and remove at the first section along the axial of pile driver frame, thereby realizes the transform of pile driver frame rotation angle. The pile driver is converted from a horizontal state to a vertical state under the supporting action of the amplitude-variable support rods, so that the pile driving work of the bridge girder erection machine is realized; and when the pile driving frame is converted from the vertical state to the horizontal state, the bridge erecting machine prepares for the next pile driving.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and the embodiments of the present application can be implemented according to the content of the description in order to make the technical means of the embodiments of the present application more clearly understood, and the detailed description of the present application is provided below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present application more clearly understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of a piling type bridge erecting machine provided by an embodiment of the application and having two legs.

Fig. 2 is a schematic structural diagram of a piling type bridge erecting machine provided by an embodiment of the application when a piling mast is in a vertical state.

Fig. 3 is a schematic structural diagram of a pile driving type bridge erecting machine provided by an embodiment of the present application when a pile driving frame is in a horizontal state.

Fig. 4 is an enlarged schematic structural diagram at C in fig. 1 according to an embodiment of the present application.

Fig. 5 is a simplified structural schematic diagram of a luffing driving mechanism according to an embodiment of the present disclosure.

Fig. 6 is a simplified structural schematic diagram of another luffing drive mechanism provided in accordance with an embodiment of the present disclosure.

Fig. 7 is a schematic view of the overall structure of a piling type bridge girder erection machine provided by the embodiment of the application when the piling type bridge girder erection machine has four legs.

Fig. 8 is a schematic working diagram of a construction platform according to an embodiment of the present application.

Fig. 9 is an operation schematic diagram of a second suspension mechanism lifting a cover beam according to an embodiment of the present application.

Fig. 10 is a schematic view of an installation structure of a pipe pile, a capping beam and a concrete beam provided in an embodiment of the present application, as viewed from a side of a bridge.

Fig. 11 is a schematic view of an installation structure of a pipe pile, a cover beam and a concrete beam provided in the embodiment of the present application, as seen from the front of a bridge.

Fig. 12 is a schematic view of a pile driving type bridge erecting machine dismantling pile driving machine provided by the embodiment of the application.

Reference numerals: the device comprises a bridge girder erection machine body 01, a pile driver 02, a pile driving frame 03, a variable amplitude support rod 04, a variable amplitude driving mechanism 05, a fixed pulley 051, a movable pulley 052, a traction rope 053, a variable amplitude hoisting mechanism 054, a fixed pulley block 51, a movable pulley block 52, a first section 06, a second section 07, a first end 08, a second end 09, a first hinged support 10, a tubular pile 11, a main beam 12, a first support leg 13, a second support leg 14, a cover beam 15, a concrete beam 16, a first middle support leg 17, a second middle support leg 18, a support platform 19, a second hinged support 20, a support column 21, a power assembly mechanism 22, a construction platform 23, a track beam 24, a first suspension mechanism 25, a telescopic mechanism 26, a second suspension mechanism 27, a third suspension mechanism 28 and a special auxiliary support leg 29.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, 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 application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The terms "comprising" and "having," and any variations thereof, in the description and claims of this application and the description of the drawings are intended to cover, but not to exclude, other elements. The word "a" or "an" does not exclude a plurality.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The following description is given with the directional terms as they are used in the drawings and is not intended to limit the specific structure of a pile driving bridge girder erection machine of the present application. For example, in the description of the present application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawings for the convenience of description and simplicity of description only, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present application.

Further, the expressions of the directions indicated such as the X direction, the Y direction, and the Z direction, which are used to explain the operation and construction of the components of a pile-driving bridge girder erection machine of the present embodiment, are not absolute but relative, and although these indications are appropriate when the components of the bridge girder erection machine are in the positions shown in the drawings, when the positions are changed, the directions should be interpreted differently to correspond to the changes.

Furthermore, the terms "first," "second," and the like in the description and claims of the present application or in the above-described drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential order, and may explicitly or implicitly include one or more of the features.

In the description of the present application, unless otherwise specified, "plurality" means two or more (including two), and similarly, "plural groups" means two or more (including two).

In the description of the present application, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., "connected" or "connected" of a mechanical structure may refer to a physical connection, e.g., a physical connection may be a fixed connection, e.g., a fixed connection by a fastener, such as a screw, bolt, or other fastener; the physical connection can also be a detachable connection, such as a mutual clamping or clamping connection; the physical connection may also be an integral connection, for example, a connection made by welding, gluing or integrally forming the connection. "connected" or "connected" of circuit structures may mean not only physically connected but also electrically connected or signal-connected, for example, directly connected, i.e., physically connected, or indirectly connected through at least one intervening component, as long as the circuits are in communication, or communication between the interiors of two components; signal connection may refer to signal connection through a medium, such as radio waves, in addition to signal connection through circuitry. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The embodiment of the present application provides a piling type bridge girder erection machine, and fig. 1 shows an overall structure schematic diagram of the piling type bridge girder erection machine provided by the embodiment of the present application when the piling type bridge girder erection machine has two legs, and as shown in fig. 1, the embodiment of the present application provides a piling type bridge girder erection machine comprising: the bridge girder erection machine comprises a bridge girder erection machine body 01, a pile driver 02 and an amplitude variation mechanism, wherein the pile driver 02 comprises a pile driving frame 03, and the amplitude variation mechanism comprises an amplitude variation support rod 04 and an amplitude variation driving mechanism 05.

The pile driving frame 03 is rotatably connected to the bridge girder erection machine body 01, and the pile driving frame 03 is divided into a first section 06 and a second section 07 along the axial direction by the rotary connection position of the pile driving frame 03; the first end 08 of the variable amplitude support rod 04 is rotatably connected with the bridge girder erection machine body 01, the second end 09 of the variable amplitude support rod 04 is rotatably connected with the first section 06 of the pile driving frame 03, the rotating plane of the variable amplitude support rod 04 is parallel to or coincident with the rotating plane of the pile driving frame 03, and the variable amplitude driving mechanism 05 drives the second end 09 of the variable amplitude support rod 04 to move in the first section 06 of the pile driving frame 03 along the axial direction of the pile driving frame 03 so as to realize the change of the rotating angle of the pile driving frame 03.

Wherein, the above rotary connection modes can be connected through hinged supports.

Illustratively, as shown in fig. 2, the pile driving frame 03 and the bridge girder erection machine body 01 are rotatably connected through the first hinge base 10, one movable end of the first hinge base 10 is connected with the side wall of the pile driving frame 03, and the other movable end of the first hinge base 10 is connected with the bridge girder erection machine body 01, so that the connection between the bridge girder erection machine body 01 and the side wall of the pile driving frame 03 through the first hinge base 10 can be realized.

In the embodiment of the application, the rotational connection manner between the first end 08 of the variable amplitude strut 04 and the bridge girder erection machine body 01 can refer to the rotational connection manner between the pile driving frame 03 and the bridge girder erection machine body 01, and details are not described here.

It should be noted that, since the second end 09 of the luffing strut 04 can change the rotation angle of the pile driving frame 03 when moving in the first section 06 of the pile driving frame 03 along the axial direction of the pile driving frame 03, it can be seen that the rotation angle of the luffing strut 04 is different from the rotation angle of the pile driving frame 03, and therefore, if it is defined that the pile driving frame 03 is rotatably connected to the bridge girder erection body 01 at a first position and the first end 08 of the luffing strut 04 is rotatably connected to the bridge girder erection body 01 at a second position, the first position is different from the second position. The first position is used as a rotation center of the pile driving frame 03 during rotation.

It should be noted that, since the rotation plane of the variable amplitude stay 04 and the rotation plane of the pile driving frame 03 are parallel, when the variable amplitude stay 04 and the pile driving frame 03 rotate, the rotation connection can be prevented from being blocked due to rotation interference, so that the rotation of the pile driving frame 03 cannot be realized; in addition, the rotation plane of the amplitude-variable stay 04 is parallel to the rotation plane of the pile driving frame 03, so that when the pile driving frame 03 rotates, the amplitude-variable stay 04 provides no component force in other directions for the supporting force of the pile driving frame 03, and all the component force acts on the pile driving frame 03, so that the amplitude-variable stay 04 can conveniently push the pile driving frame 03 to rotate.

In the embodiment of the application, the second end 09 of the luffing strut 04 is rotatably connected with the first section 06 of the pile driving frame 03, and the second end 09 can move in the axial direction of the pile driving frame 03 in the first section 06 of the pile driving frame 03 under the driving action of the luffing driving mechanism 05. Because the first end 08 of the luffing strut 04 is rotatably connected with the bridge girder erection machine body 01 at the second position and the pile driving frame 03 is rotatably connected with the bridge girder erection machine body 01 at the first position, when the second end 09 of the luffing strut 04 moves in the first section 06 of the pile driving frame 03 in the axial direction of the pile driving frame 03 towards the second section 07 close to the pile driving frame 03, the length of the luffing strut 04 is unchanged, so that the pile driving frame 03 can rotate in the direction away from the first end 08 of the luffing strut 04 under the supporting action of the luffing strut 04; similarly, when the second end 09 of the luffing strut 04 moves in the first section 06 of the pile driving stand 03 in the axial direction of the pile driving stand 03 in the direction away from the second section 07 of the pile driving stand 03, the first section 06 can rotate in the direction close to the first end 08 of the luffing strut 04 under the action of the self gravity and the supporting action of the luffing strut 04. Thereby, the rotation angle of the pile frame 03 is changed. Compared with the prior art, the variable amplitude support rod 04 is arranged to support the pile driving frame 03 in the embodiment of the application, the second end 09 of the variable amplitude support rod 04 is driven by the variable amplitude driving mechanism 05 to move in the first section 06 along the axial direction of the pile driving frame 03, so that the rotation angle of the pile driving frame 03 is changed, the pile driving frame 03 is not supported by a hydraulic cylinder, the problem that the hydraulic cylinder with a large stroke is needed in the prior art is solved, and the problem that the lower end of the pile driving frame 03 is easily interfered with the lower land surface is avoided.

In some embodiments, as shown in fig. 1, 2 and 3, when the luffing driving mechanism 05 drives the second end 09 of the luffing strut 04 to move in a direction close to the second section 07 of the pile driving frame 03, the pile driving frame 03 is converted from a horizontal state to a vertical state under the supporting action of the luffing strut 04, and the second section 07 is located below the bridge girder erection body 01 and is used for driving a pile; when the amplitude variation driving mechanism 05 drives the second end 09 of the amplitude variation support rod 04 to move in the direction away from the second section 07 of the pile driving frame 03, the pile driving frame 03 is converted from the vertical state to the horizontal state for preparing for the next pile driving.

It should be noted that, because the tubular pile 11 is generally horizontal when being lifted by the bridge girder erection machine body 01, and the tubular pile 11 needs to be kept stable on the pile driving frame 03 before being installed on the pile driving frame 03 and fixed, so as to prevent the tubular pile 11 from slipping off, the pile driving frame 03 should be able to stay in the horizontal state during rotation, so as to install the tubular pile 11, as shown in fig. 3; secondly, the pipe pile 11 should be driven into the ground in a vertical state, and accordingly, the pile driving frame 03 should be able to stay in the vertical state during the rotation process to perform pile driving, as shown in fig. 2. Therefore, the length of the first section 06 of the pile driving frame 03 is not less than a first threshold value, where the first threshold value is the length of the second end 09 of the luffing strut 04 moving on the first section 06 of the pile driving frame 03 in the axial direction of the pile driving frame 03 when the pile driving frame 03 can be switched from the vertical state to the horizontal state or from the horizontal state to the vertical state, so that the pile driving frame 03 can reach both the horizontal state and the vertical state.

In the embodiment of the application, the pile driving frame 03 is provided with a slide way in the axial direction, the second end 09 of the luffing strut 04 is rotatably connected with a slide block, and the luffing strut 04 slides in the slide way through the slide block, so that the second end 09 of the luffing strut 04 moves in the axial direction of the pile driving frame 03.

It should be noted that the slide is arranged in the first section 06 of the pile driving frame 03 and has a length smaller than the length of the first section 06 of the pile driving frame 03, it being understood that the length of the slide is greater than or equal to the first threshold value. In one embodiment, the sliding block and the sliding way are made of metal, and the surface of the sliding way, which is in contact with the sliding block, has smaller roughness so as to reduce the friction resistance between the sliding block and the sliding way.

For example, the slide way is provided with a T-shaped groove along the axial direction thereof, the slide block is a T-shaped block, the slide block moves along the T-shaped groove in the slide way, and the luffing strut 04 is hinged with the part of the slide block extending out of the T-shaped groove through a pin shaft, so that the second end 09 of the luffing strut 04 moves and rotates relative to the pile driving frame 03.

The second end 09 of the variable amplitude strut 04 slides in the slide way through the slide block, so that the second end 09 of the variable amplitude strut 04 moves along the axial direction of the pile driving frame 03, the resistance of the second end 09 of the variable amplitude strut 04 moving in the first section 06 along the axial direction of the pile driving frame 03 is reduced, and the change of the rotating angle of the pile driving frame 03 is facilitated.

It should be noted that, in order to reduce the resistance of the second end 09 of the variable-amplitude stay 04 to move in the first section 06 along the axial direction of the pile driving frame 03, a guide rail may be further disposed along the axial direction of the pile driving frame 03, the second end 09 of the variable-amplitude stay 04 is rotatably connected with a roller, and the variable-amplitude stay 04 moves along the guide rail through the roller, so as to implement the axial movement of the second end 09 of the variable-amplitude stay 04 along the pile driving frame 03.

In some embodiments, as shown in fig. 1, 4 and 5, the luffing drive 05 comprises a crown block 051, a travelling block 052, a pull line 053 and a luffing winch 054.

The variable-amplitude winding mechanism 054 and the fixed pulley 051 are both arranged on the bridge girder erection machine body 01, the movable pulley 052 is arranged at the second end 09 of the variable-amplitude support rod 04, the traction rope 053 is wound between the fixed pulley 051 and the movable pulley 052, one end of the traction rope 053 is connected to the fixed pulley 051, and the other end of the traction rope 053 is connected to the variable-amplitude winding mechanism 054. The variable-amplitude winding mechanism 054 adjusts the distance between the movable pulley 052 and the fixed pulley 051 by winding and unwinding the traction rope 053 so as to drive the second end 09 of the variable-amplitude support rod 04 to move along the axial direction of the pile driving frame 03.

It should be noted that the fixed pulleys 051 and the movable pulleys 052 may be one or more groups, for example, as shown in fig. 6, in an embodiment, when the luffing strut 04 is wider, a fixed pulley group 51 and a movable pulley group 52 may be provided, wherein the fixed pulley group 51 includes a plurality of fixed pulleys 051, the movable pulley group 52 includes a plurality of movable pulleys 052, two luffing mechanisms 054 are provided, one end of the hauling rope 053 is connected to one of the luffing mechanisms 054, the other end is wound between the plurality of fixed pulleys 051 and the movable pulleys 052, and is finally fixed to one of the movable pulleys 052 or to the other luffing mechanism 054, only one of the winding manners of the hauling rope 053 is shown in fig. 6, and in actual use, the hauling rope 053 may have more winding manners, which is not limited in this embodiment of the present invention. The arrangement of the fixed pulley block 51 and the movable pulley block 52 can make the second end 09 of the luffing strut 04 more labor-saving when moving along the axial direction of the pile driving frame 03. In the embodiment of the application, both the luffing winch 054 and the fixed pulley 051 are fixedly installed on the bridge girder erection machine body 01, because the hauling rope 053 is wound between the fixed pulley 051 and the movable pulley 052, and one end of the hauling rope 053 is connected to the fixed pulley 051, and the other end is connected to the luffing winch 054, the luffing winch 054 can move the movable pulley 052 towards the direction close to the fixed pulley 051 by tightening the hauling rope 053, so as to drive the second end 09 of the luffing strut 04 to move towards the second section 07 in the first section 06 along the axial direction of the pile driving frame 03, under the supporting action of the luffing strut 04, the first section 06 of the pile driving frame 03 rotates towards the direction far from the first end 08 of the strut 04, so that the pile driving frame 03 reaches the vertical state from the horizontal state, and when the vertical state, the luffing mechanism 054 stops tightening the hauling rope 053, so that the movable pulley 052 stops moving towards the second section 07, at the moment, the variable amplitude strut 04 tightly abuts against the pile driving frame 03 from one side, so that the pile driving frame 03 is stressed and balanced under the support of the second end 09 of the variable amplitude strut 04 and the bridge girder erection machine body 01, and is stably kept in a vertical state for the pile driving operation of the pile driver 02; when the variable-amplitude hoisting mechanism 054 loosens the traction rope 053, the pulling force of the traction rope 053 on the movable pulley 052 is instantaneously reduced, the movable pulley 052 has a tendency of sliding towards the direction of the second section 07 far away from the pile driving frame 03, the supporting force of the variable-amplitude stay rod 04 on the pile driving frame 03 is reduced, the stress of the pile driving frame 03 is not balanced any more, so that the pile driving frame 03 can rotate towards the direction close to the variable-amplitude stay rod 04 under the action of the gravity of the first section 06, and meanwhile, the movable pulley 052 slides towards the direction far away from the fixed pulley 051 along the axial direction of the pile driving frame 03. The luffing winch 054 controls the speed of rotation of the pile driving frame 03 by controlling the speed of releasing the hauling rope 053, and at the same time, the luffing winch 054 controls the angle of rotation of the pile driving frame 03 by controlling the degree to which the hauling rope 053 is released, for example, rotating the pile driving frame 03 to a horizontal position to facilitate installation of the tubular pile 11.

It should be noted that, in the embodiment of the present application, the winding manner of the hauling rope 053 is not limited, and the variable-amplitude hoisting mechanism 054 can adjust the distance between the movable pulley 052 and the fixed pulley 051 by winding and unwinding the hauling rope 053. For example, the hauling cable 053 may also be wound between the fixed pulley 051 and the movable pulley 052, and both ends of the hauling cable 053 are connected to the luffing winch 054, wherein the luffing winch 054 may be the same or two different luffing mechanisms.

In some embodiments, the luffing drive 05 can also comprise a rack, a gear, and a drive motor.

Driving motor installs at bridge girder erection machine body 01, and it is connected with the gear to rotate on the second end 09 of width of cloth vaulting pole 04, and the first section 06 of pile driving frame 03 is provided with the rack along its axial, and the gear meshes with the rack, and driving motor is used for drive gear to rotate, and the gear drives the second end 09 that becomes width of cloth vaulting pole 04 and removes along the rack to realize that the second end 09 that becomes width of cloth vaulting pole 04 follows the axial displacement of pile driving frame 03, and then drive pile driving frame 03 and rotate.

In some embodiments, the luffing drive 05 can also comprise a hydraulic cylinder.

The hydraulic cylinder is arranged on the pile driving frame 03 along the axial direction of the pile driving frame 03, the cylinder body of the hydraulic cylinder is connected with the pile driving frame 03, the piston rod of the hydraulic cylinder is connected with the second end 09 of the amplitude-variable supporting rod 04, the piston rod of the hydraulic cylinder stretches and retracts to drive the second end 09 of the amplitude-variable supporting rod 04 to move along the first section 06 of the pile driving frame 03, when the piston rod of the hydraulic cylinder stretches, the second end 09 of the amplitude-variable supporting rod 04 is driven to move in the first section 06 in the axial direction of the pile driving frame 03 in the direction far away from the second section 07, and the first section 06 of the pile driving frame 03 rotates in the direction close to the first end 08 of the amplitude-variable supporting rod 04; when a piston rod of the hydraulic cylinder is shortened, the second end 09 of the luffing strut 04 is driven to move in the first section 06 in the axial direction of the pile driving frame 03 in the direction close to the second section 07, and the first section 06 of the pile driving frame 03 rotates in the direction far away from the first end 08 of the luffing strut 04.

As shown in fig. 2 and 3, in the pile-driving bridge girder erection machine provided by the embodiment of the present application, a rotational connection portion between the first end 08 of the variable-amplitude stay 04 and the bridge girder erection machine body 01, a rotational connection portion between the second end 09 of the variable-amplitude stay 04 and the pile driving frame 03, and a rotational connection portion between the pile driving frame 03 and the bridge girder erection machine body 01 are both triangular structures at any position in the rotation process of the pile driving frame 03, and the triangular structures are used for controlling the stability of the pile driver 02.

Since the pile driving frame 03 needs to be placed on the pile driving frame 03 in a horizontal state, at this time, the weight of the pile driving frame 03 and the weight of the pile pipe 11 are large, therefore, the luffing brace 04 needs to provide support for the pile driving frame 03 in this state to ensure the stability of the pile driving frame 03 in the horizontal state, and therefore, in one embodiment of the application, the rotary joint of the first end 08 of the amplitude strut 04 and the bridge girder erection machine body 01 is lower than the rotary joint of the pile driving frame 03 and the bridge girder erection machine body 01, so that when the pile driving frame 03 is in a horizontal state, the amplitude-variable stay 04 is obliquely positioned below the pile driving frame 03 in the horizontal state, the higher end of the amplitude-variable stay 04 is abutted against the pile driving frame 03, the lower end of the amplitude-variable stay 04 is connected to the bridge girder erection machine body 01, therefore, the amplitude-variable support rod 04 can still support the pile driving frame 03, and the pile driving frame 03 has better stability in a horizontal state.

For example, as shown in fig. 1, in a pile-driving bridge girder erection machine provided by the embodiment of the present application, a bridge girder erection machine body 01 includes a main girder 12, a first leg 13 and a second leg 14.

Two main beams 12 are arranged in parallel, the length direction of the main beams 12 is arranged along the extension direction of the bridge, the first supporting legs 13 are positioned at the front ends of the main beams 12, and the second supporting legs 14 are positioned at the rear ends of the main beams 12; the extending direction of the bridge during construction of the bridge girder erection machine is the front direction (such as the direction L in fig. 1) of the main girder 12, and the opposite direction of the extending direction of the bridge during construction of the bridge girder erection machine is the rear direction of the main girder 12.

Bridge girder erection machine during construction, the first leg 13 is supported on the already constructed cap beam 15, the second leg 14 is supported on the already constructed concrete beam 16, and the part of the main girder 12 at the front end of the first leg 13 is used for connecting the pile driver frame 03 for driving the pile in the foremost part of the extension direction of the bridge, for example, the pile driver 02 is connected to one of the main girders 12 or between the two main girders 12. After the pile driver 03 finishes driving the pile, the bridge girder erection machine can install the cap beam 15 and the concrete beam 16 on the top of the tubular pile 11.

It should be noted that, in the bridge girder erection machine of the pile-driving type provided by the embodiment of the present application, the number of the legs included in the bridge girder erection machine body 01 may also be more than two.

Illustratively, as shown in fig. 7, the bridge girder erection machine body 01 comprises 4 legs: a first leg 13, a second leg 14, a first center leg 17, and a second center leg 18. First leg 13 is located at the front end of main beam 12, second leg 14 is located at the rear end of main beam 12, and first center leg 17 and second center leg 18 are also located on main beam 12, between first leg 13 and second leg 14. Wherein, landing leg 17 is close to first landing leg 13 and sets up in the first, and landing leg 18 is close to second landing leg 14 and sets up in the second, and all landing legs are all hung on the track of girder 12 bottom through the change gear structure, and all landing legs are all from taking driving motor, can remove along girder 12 to make girder 12 can be according to bridge construction process adjustment position, and each landing leg can be in girder 12 different states under bracing girder 12, make bridging machine body 01 be in balanced state always.

For example, when the bridge girder erection machine is in operation, two of the legs are in a suspended state, and the other two legs are used for supporting the main girder 12, for example, the second leg 14 and the first middle leg 17 are used for supporting the main girder 12, and the first leg 13 and the second middle leg 18 are in a suspended state, when the main girder 12 needs to move along with the construction process of the bridge, the first leg 13 and the second middle leg 18 are firstly moved along the main girder 12 to a target position, and after the main girder is moved to the target position, the first leg 13 and the second middle leg 18 are changed to support the main girder 12, the first middle leg 17 and the second leg 14 are in a suspended state, the main girder 12 moves to the target position under the support of the first leg 13 and the second middle leg 18, and the first middle leg 17 and the second leg 14 move together with the main girder 12 to the target position and are in a suspended state until the next movement of the main girder 12.

In the embodiment of the present application, the main beam 12 can move transversely and longitudinally under the support of the first leg 13, the second leg 14, the first middle leg 17 and the second middle leg 18, for example, the transverse movement and the longitudinal movement can be controlled by hydraulic cylinders. Here, the movement of the main beam 12 in the bridge extending direction is referred to as lateral movement, and the movement of the main beam 12 in the bridge width direction is referred to as longitudinal movement.

When the bridge girder erection machine works, the pile driving frame 03 can be driven to transversely move by the transverse movement of the main beam 12, and the pile driving frame 03 can be driven to longitudinally move by the longitudinal movement of the main beam 12, so that the positioning of the space coordinate of the pile driver 02 before piling is realized.

As shown in fig. 7, in an embodiment of the present application, the bridge girder erection machine body 01 further includes a supporting platform 19, and when the bridge girder erection machine body 01 provided in the embodiment of the present application includes the supporting platform 19, the fixed pulley 051 may be further disposed on the supporting platform 19.

In one embodiment of the present application, a support platform 19 is located below the main beams 12 and is attached to the bottom of the main beams 12. The first end 08 of the luffing strut 04 is rotatably connected to the bridge girder erection machine body 01 by being rotatably connected to the support platform 19. The pile driving frame 03 is rotatably connected to the main beam 12 and is rotatably connected to the bridge girder erection machine body 01.

It should be noted that in this embodiment, since the supporting platform 19 is located below the main beam 12, the rotational joint of the first end 08 of the luffing strut 04 and the bridge girder erection machine body 01 is still lower than the rotational joint of the pile driving frame 03 and the bridge girder erection machine body 01, so that when the pile driving frame 03 is located in a horizontal state, the luffing strut 04 can still support the pile driving frame 03, and when the pile driving frame 03 is located in a horizontal state, the pile driving frame 03 is still stable.

It should be noted that the supporting platform 19 may be connected to the bottom of the main beam 12 through a hinge, the first end 08 of the variable-amplitude strut 04 may be rotatably connected to the supporting platform 19 through a hinge, and the pile driving frame 03 may be rotatably connected to the main beam 12 through a hinge.

Illustratively, as shown in fig. 3, the support platform 19 may be connected to the bottom of the main beam 12 by a second hinge 20 and the pile driving stand 03 may be pivotally connected to the main beam 12 by the first hinge 10.

In some embodiments, as shown in fig. 3, the support platform 19 is in a parallelogram configuration when viewed from the side of the main beam 12, and the support platform 19 includes a strut 21, and the strut 21 connects any two opposite corners of the parallelogram configuration.

Illustratively, as shown in fig. 2 and 3, the support platform 19 is located below the main beam 12 and is connected to the bottom of the main beam 12 in a vertical direction at the upper portion of the parallelogram structure by two second hinge mounts 20, it being understood that the support platform 19 may also be connected to the bottom of the main beam 12 by more hinge mounts. The first end 08 of the amplitude-variable stay 04 is rotatably connected with an included angle which is far away from the pile driving frame 03 in two lower included angles in the parallelogram structure of the supporting platform 19, and two ends of the strut 21 are respectively connected with two obtuse angles of the parallelogram structure. The arrangement mode enables the supporting platform 19 to be stable in structure and not easy to deform, so that more reliable supporting force is provided for the amplitude-variable supporting rod 04, and the amplitude-variable supporting rod 04 can also better provide supporting force for the pile driving frame 03.

In the embodiments provided herein, as shown in fig. 1 and 4, the pile driver 02 may further include a powertrain mechanism 22, the powertrain mechanism 22 powering the pile driving operation of the pile driver 02.

Since the pile driver should pile first when bridging, the pile driver frame 03 needs to be rotatably connected to the part of the main beam 12 located in front of the first leg 13, and the main beam 12 of this part is prone to be deflected after being stressed, for example, when the weight of the pile driver 02 itself is large, and in the case that the pile driver frame 03 carries the pile 11, the main beam 12 is prone to be deflected due to the excessive bearing weight at the front end.

In order to solve the problem of the main beam 12 causing the downwarp due to the overlarge front end bearing weight, the luffing mechanism 054 and the powertrain mechanism 22 can be arranged at the part of the main beam 12 behind the first leg 13, so that the downwarp of the main beam 12 due to the overlarge front end bearing weight can be reduced.

In addition, the amplitude-variable stay 04 and the support platform 19 can be arranged on one side of the pile driving frame 03 far away from the front end of the main beam 12. Compared with the method that the amplitude-variable stay rod 04 and the support platform 19 are both arranged on one side of the pile driving frame 03 close to the front end of the main beam 12, the load bearing of the front end of the main beam 12 can be slightly moved backwards, and therefore the downwarping of the front end of the main beam 12 is reduced. As shown in fig. 8, in the actual construction process, after the tubular pile 11 is driven, the length of the tubular pile 11 is not necessarily accurate and needs to be connected or cut to the tubular pile 11 so that the tubular pile 11 has the proper length. In order to facilitate pile extension or pile cutting of the tubular pile 11, in an embodiment, the bridge girder erection machine body 01 further includes a construction platform 23, and the construction platform 23 is suspended below the main beam 12 and used for bearing personnel and objects, so that the personnel can conveniently carry out pile extension and pile cutting on the tubular pile 11.

Fig. 8 shows a working schematic of the construction platform 23. As shown in fig. 8, the bridge girder erection machine body 01 further includes a rail beam 24, a first suspension mechanism 25, and a telescopic mechanism 26. Track roof beam 24 is along bridge crane construction time bridge extending direction, the setting is on bridge crane body 01, first suspend mechanism 25 in midair and can remove along track roof beam 24, first suspend mechanism 25 in midair and pass through telescopic machanism 26 and construction platform 23 connection, it removes the horizontal direction that realizes construction platform 23 along track roof beam 24 to suspend mechanism 25 in midair through first, the flexible function through telescopic machanism 26 realizes construction platform 23 at the ascending removal of vertical side, the horizontal direction through construction platform 23 removes and vertical direction removes so that construction platform 23 bears personnel and article remove suitable construction position, and then make things convenient for personnel to connect the stake and cut the stake to tubular pile 11.

In addition to lifting the tubular pile 11, the pile-driving type bridge girder erection machine provided by the embodiment of the present invention is also used for lifting the cap beam 15 and the concrete beam 16, and in order to facilitate lifting the tubular pile 11, the cap beam 15 and the concrete beam 16, as shown in fig. 1, in some embodiments, the bridge girder erection machine body 01 may further include a second suspension mechanism 27 and a third suspension mechanism 28.

The second suspension mechanism 27 and the third suspension mechanism 28 are both mounted on the main beam 12, wherein the second suspension mechanism 27 is mounted at the front end of the main beam 12, and the third suspension mechanism 28 is mounted at the rear end of the main beam 12.

Fig. 9 shows an operation diagram of the second suspension mechanism 27 for lifting the capping beam 15 in the extending direction of the bridge, and fig. 10 and 11 show installation diagrams of the pipe pile 11, the capping beam 15 and the concrete beam 16 according to the embodiment of the present application.

When the pile-driving type bridge girder erection machine is used for construction, for example, when the capping beam 15 is lifted, the capping beam 15 needs to be rotated from a direction parallel to the extension direction of the bridge to a direction substantially consistent with the width direction of the bridge, at this time, in order to ensure that the capping beam 15 is rotated to a proper position, the second suspension mechanism 27 needs to independently complete the lifting of the capping beam 15, and rotate the capping beam 15 to a proper angle, so that the capping beam 15 can accurately fall on the pipe pile 11, or the lifting and moving work of the capping beam 15 in a narrow space area is completed, and when the capping beam 15 is lifted to a wide area, the capping beam 15 is rotated to a proper angle, so that the erection work of the capping beam 15 is completed. The second suspension means 27 can adjust the capping beam 15 in the horizontal direction when lifting the capping beam 15 and also adjust the capping beam 15 in the vertical direction, and the positioning operation of the capping beam 15 is realized by adjusting the capping beam 15 in both the horizontal and vertical directions.

When the pile driving type bridge erecting machine is used for construction without rotating the lifted object, for example, the pipe pile 11 and the concrete beam 16, the second suspension mechanism 27 and the third suspension mechanism 28 may cooperate to complete the lifting operation of the pipe pile 11 and the concrete beam 16, for example, as shown in fig. 1 and 7, the pipe pile 11 or the concrete beam 16 is lifted and hoisted in place together in such a way that the second suspension mechanism 27 is located at the front and the third suspension mechanism 28 is located at the rear.

The once hole passing completion of the piling type bridge girder erection machine comprises the following working process.

The second suspension mechanism 27 and the third suspension mechanism 28 lift and hang the tubular pile 11 from the rear of the bridge girder erection machine to the front of the bridge girder erection machine until the tubular pile 11 reaches the pile driving frame 03, at this time, the pile driving frame 03 is in a horizontal state, the amplitude-variable brace 04 and the support platform 19 both provide support force for the pile driving frame 03, so that the pile driving frame 03 can sufficiently bear the weight of the tubular pile 11, the second suspension mechanism 27 and the third suspension mechanism 28 place the tubular pile 11 on the pile driving frame 03 in the horizontal state, and the tubular pile 11 is fixed by the pile gripper on the pile driving frame 03. Then, when the amplitude-varying driving mechanism 05 drives the second end 09 of the amplitude-varying support rod 04 to move towards the direction close to the second section 07 of the pile driving frame 03, the pile driving frame 03 takes the first hinge base 10 as a rotation center during rotation under the supporting action of the amplitude-varying support rod 04 to carry the pipe pile 11 together, the pipe pile 11 is converted into a vertical state from a horizontal state, and then the transverse movement and the longitudinal movement of the main beam 12 are realized through the matching action of the first middle support leg 17 and the second middle support leg 18. And the transverse movement of the main beam 12 can drive the pile driving frame 03 and the tubular pile 11 to transversely move, and the longitudinal movement of the main beam 12 can drive the pile driving frame 03 and the tubular pile 11 to longitudinally move, so that the spatial coordinate of the tubular pile 11 before pile driving is positioned. After the position of the pipe pile 11 is determined, the pile driver 02 starts driving the pipe pile 11 vertically into the ground and into a predetermined depth.

After the pile driving is finished, the amplitude variation driving mechanism 05 controls the pile driving frame 03 to rotate to the horizontal state to prepare for installing the next tubular pile 11.

After the tubular pile 11 of a through hole of the bridge is drilled, the cover beam 15 is placed behind the bridge girder erection machine, the second suspension mechanism 27 starts to lift and hang the cover beam 15, the cover beam 15 is placed at a specific position above the tubular pile 11 along a specific direction through the rotation and positioning functions, finally the concrete beam 16 is placed behind the bridge girder erection machine, and the second suspension mechanism 27 and the third suspension mechanism 28 are matched with each other to lift and hang the concrete beam 16 until the concrete beam 16 is placed above the cover beam 15. And repeating the steps until the bridge construction is finished.

After the second suspension mechanism 27 and the third suspension mechanism 28 place the tubular pile 11 on the pile driver frame 03 in a horizontal state, the second suspension mechanism 27 and the third suspension mechanism 28 can move to the rear end of the main beam 12, so that the rear end of the main beam 12 can be weighted to balance with the pile driver frame 03 erected at the front end of the main beam 12, and the whole structure of the bridge girder erection machine is more stable.

The pile-driving bridge girder erection machine provided by the embodiment of the application needs to be constructed in environments such as lakes and marshes and hard ground environments such as mountainous areas and cities, for example, fig. 1 shows the pile-driving bridge girder erection machine provided by the embodiment of the application in environments such as lakes and marshes (position a in the figure) and fig. 12 shows a schematic diagram of the pile-driving bridge girder erection machine provided by the embodiment of the application in detaching the pile driver. Since the pile driving frame 03 is required to be installed in a lake or the like for pile driving work, and the pile driving frame 03 is not required to be installed in a mountain urban area, the pile driver 02 and the bridge girder erection body 01 are detachably and rotatably connected to each other in order to adapt to the above two environments.

It should be noted that the detachable rotation connection may be a detachable connection between the first hinge support 10 and the bridge erecting machine body 01, for example, a bolt is used to connect the first hinge support 10 and the bridge erecting machine body 01. It is also possible that there is a detachable connection between the first hinge base 10 and the pile driver 02, for example, by bolting the first hinge base 10 and the pile driver 02.

As shown in fig. 12, when the pipe pile 11 and the cap beam 15 are installed in a mountain area, a city, or the like, the pile driver 02 may be removed as a whole, and the pile driver may be replaced with a dedicated auxiliary leg 29 to be supported on the ground, thereby completing the lifting of the pipe pile 11 and the installation of the cap beam 15 and the concrete beam 16.

In summary, the pile driver is fixed on the bridge girder erection machine by the pile driving type bridge girder erection machine, so that the problem of difficult construction of a pier foundation caused by difficult installation of the pile driver on the ground of a river, a lake or an offshore area is solved. And the amplitude-variable winding mechanism and the power assembly mechanism are arranged at the rear end of the main beam, so that the downwarp of the front end of the main beam is reduced. The positioning of the spatial coordinates of the pile driver before pile driving can be realized through the cooperation of the first middle supporting leg and the second middle supporting leg. Can be through setting up construction platform so that personnel carry out pile extension and cut a stake to the tubular pile. The lifting of the cover beam and the rotary positioning erection operation of the cover beam can be completed through the second suspension mechanism, and the lifting work of the tubular pile and the concrete beam can be completed through the cooperation of the second suspension mechanism and the third suspension mechanism.

Those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than others, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. A piling type bridge girder erection machine, comprising: the bridge girder erection machine comprises a bridge girder erection machine body (01), a pile driver (02) and a luffing mechanism;

the pile driver (02) comprises a pile driving frame (03);

the amplitude variation mechanism comprises an amplitude variation support rod (04) and an amplitude variation driving mechanism (05);

the pile driving frame (03) is rotatably connected to the bridge girder erection machine body (01), and the rotary connection position of the pile driving frame (03) divides the pile driving frame (03) into a first section (06) and a second section (07) along the axial direction of the pile driving frame; the first end (08) of the amplitude-variable support rod (04) is rotatably connected with the bridge girder erection machine body (01), the second end (09) of the amplitude-variable support rod (04) is rotatably connected with the first section (06) of the pile driving frame (03), the rotating plane of the amplitude-variable support rod (04) is parallel to the rotating plane of the pile driving frame (03), and the amplitude-variable driving mechanism (05) drives the second end (09) of the amplitude-variable support rod (04) to move in the first section (06) along the axial direction of the pile driving frame (03) so as to realize the conversion of the rotating angle of the pile driving frame (03).

2. The pile-driving bridge girder erection machine according to claim 1, wherein when the amplitude-varying driving mechanism (05) drives the second end (09) of the amplitude-varying support rod (04) to move towards the direction close to the second section (07) of the pile driving frame (03), the pile driving frame (03) is converted from the horizontal state to the vertical state under the supporting action of the amplitude-varying support rod (04), and the second section (07) is positioned below the bridge girder erection machine body (01); when the amplitude variation driving mechanism (05) drives the second end (09) of the amplitude variation support rod (04) to move in the direction away from the second section (07) of the pile driving frame (03), the pile driving frame (03) is converted into the horizontal state from the vertical state.

3. The piling bridge girder erection machine according to claim 1, wherein the piling boom (03) is provided with a slide way along the axial direction thereof, the second end (09) of the luffing strut (04) is rotatably connected with a slide block, and the luffing strut (04) slides in the slide way through the slide block to realize the axial movement of the second end (09) of the luffing strut (04) along the piling boom (03).

4. The piling bridge girder erection machine of claim 2, wherein the luffing drive mechanism (05) comprises a fixed pulley (051), a movable pulley (052), a hauling cable (053) and a luffing winch mechanism (054);

the variable-amplitude hoisting mechanism (054) and the fixed pulley (051) are both arranged on the bridge girder erection machine body (01), the movable pulley (052) is arranged at the second end (09) of the variable-amplitude support rod (04), the hauling rope (053) is wound between the fixed pulley (051) and the movable pulley (052), one end of the hauling rope (053) is connected to the fixed pulley (051), and the other end of the hauling rope (053) is connected to the variable-amplitude hoisting mechanism (054);

the variable-amplitude winding mechanism (054) adjusts the distance between the movable pulley (052) and the fixed pulley (051) by winding and unwinding the traction rope (053) so as to drive the second end (09) of the variable-amplitude support rod (04) to move along the axial direction of the pile driving frame (03).

5. The pile-driving bridge girder erection machine according to claim 1, wherein a connecting line between a first end (08) of the amplitude-variable stay (04) and a rotary joint of the bridge girder erection machine body (01), a second end (09) of the amplitude-variable stay (04) and the pile driving frame (03) and a rotary joint of the pile driving frame (03) and the bridge girder erection machine body (01) is in a triangular structure at any position of the pile driving frame (03) in the rotating process, and the triangular structure is used for controlling the stability of the pile driver (02).

6. The piling bridge girder erection machine according to claim 2, wherein the rotational connection of the first end (08) of the luffing strut (04) with the bridge girder erection body (01) is lower than the rotational connection of the piling mast (03) with the bridge girder erection body (01), so that the luffing strut (04) can still support the piling mast (03) when the piling mast (03) is in a horizontal state.

7. Pile-driving bridge girder erection machine according to claim 4, wherein the bridge girder erection machine body (01) comprises a main girder (12), a first leg (13) and a second leg (14);

the length direction of the main beam (12) is arranged along the extension direction of the bridge, the first supporting leg (13) is positioned at the front end of the main beam (12), and the second supporting leg (14) is positioned at the rear end of the main beam (12); the extending direction of the bridge during the construction of the bridge girder erection machine is taken as the front of the main girder (12), and the opposite direction of the extending direction of the bridge during the construction of the bridge girder erection machine is taken as the back of the main girder (12);

the pile driving frame (03) is rotatably connected to the part, located in front of the first supporting leg (13), of the main beam (12), and the amplitude variation hoisting mechanism (054) is arranged on the part, located behind the first supporting leg (13), of the main beam (12) so as to reduce downwarping of the front end of the main beam (12).

8. Pile-driving bridge girder erection machine according to claim 7, wherein the bridge girder erection machine body (01) further comprises a support platform (19);

the supporting platform (19) is positioned below the main beam (12) and is connected with the bottom of the main beam (12);

the first end (08) of the amplitude-variable support rod (04) is rotatably connected with the supporting platform (19) and is rotatably connected with the bridge girder erection machine body (01);

the pile driving frame (03) is rotatably connected to the main beam (12) and is rotatably connected with the bridge girder erection machine body (01);

when the pile driving frame (03) is in a vertical state, the amplitude-variable support rod (04) and the support platform (19) are arranged on one side of the pile driving frame (03) far away from the front end of the main beam (12) so as to reduce downwarping of the front end of the main beam (12).

9. A pile-driving bridge girder erection machine according to claim 8, wherein the support platform (19) is of parallelogram structure as seen from the side of the girder (12), the support platform (19) comprising a pillar (21), the pillar (21) connecting any two opposite corners of the parallelogram structure.

10. Pile-driving bridge girder erection machine according to claim 7, wherein the bridge girder erection machine body (01) further comprises a construction platform (23);

construction platform (23) suspend in midair in girder (12) below for bear weight of personnel and article, so that personnel carry out pile extension and pile cutting to tubular pile (11).

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