CN114319111A - Bridge girder erection machine, front supporting leg reversing method and hole passing method of bridge girder erection machine - Google Patents
Bridge girder erection machine, front supporting leg reversing method and hole passing method of bridge girder erection machine Download PDFInfo
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- CN114319111A CN114319111A CN202111484795.4A CN202111484795A CN114319111A CN 114319111 A CN114319111 A CN 114319111A CN 202111484795 A CN202111484795 A CN 202111484795A CN 114319111 A CN114319111 A CN 114319111A
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Abstract
The invention provides a bridge girder erection machine, a front supporting leg and leg reversing method of the bridge girder erection machine and a hole passing method. The bridge girder erection machine comprises a machine body frame and a supporting leg assembly for supporting the machine body frame, wherein the supporting leg assembly comprises a front supporting leg and an auxiliary supporting leg which are arranged on the machine body frame in a longitudinally moving mode; the front supporting legs comprise a first cross beam, at least two first supporting legs and at least two transverse supporting legs, wherein the at least two first supporting legs and the at least two transverse supporting legs are positioned below the first cross beam and connected with the first cross beam, and the first supporting legs and the transverse supporting legs are telescopic supporting legs; the auxiliary supporting legs comprise second cross beams and at least two second supporting legs which are located below the second cross beams and connected with the second cross beams, the second supporting legs are telescopic supporting legs, the positions of the second supporting legs correspond to the positions of one transverse moving supporting leg respectively, and stepping structures which are arranged along the longitudinal direction and close to one side of the transverse moving supporting leg in an extending mode are arranged at the lower ends of the second supporting legs. The front support leg of the bridge girder erection machine can be switched rapidly and keep structural stability.
Description
Technical Field
The invention relates to the technical field of bridge erection, in particular to a bridge girder erection machine, a front supporting leg inverting method and a hole passing method of the bridge girder erection machine.
Background
The bridge girder erection machine is equipment for placing prefabricated beam pieces on a prefabricated bridge pier. Its main function is to lift the beam and then put it down after being transported into position. The bridge girder erection machine needs to walk along the extending direction of a bridge (such as a highway bridge) in the construction process, or is called longitudinal movement. During the longitudinal movement, the legs need to be reversed, particularly the forward reversal of the front legs needs to be realized, and during the reversal of the front legs, additional legs such as auxiliary legs need to be used for realizing the support of the frame of the bridge girder erection machine.
In the related art, the front supporting leg and the auxiliary supporting leg are supported on different tubular piles, so that the requirement on the stress stability of a frame of a bridge girder erection machine is high, particularly, under the conditions that the functions of the bridge girder erection machine are more and more, and the bridge girder erection machine is more and more heavy, a new challenge is provided for the leg reversing structure of the front supporting leg, and the leg reversing is relatively troublesome.
Disclosure of Invention
The present invention is directed to solving at least one aspect of the above problems to some extent.
In order to solve at least one of the above problems, in a first aspect, the present invention provides a bridge girder erection machine, which includes a body frame and a leg assembly for supporting the body frame, wherein the leg assembly includes a front leg and an auxiliary leg movably disposed on the body frame in a longitudinal direction;
the front supporting legs comprise a first cross beam, at least two first supporting legs and at least two transverse supporting legs, wherein the at least two first supporting legs and the at least two transverse supporting legs are positioned below the first cross beam and connected with the first cross beam, and the first supporting legs and the transverse supporting legs are telescopic supporting legs;
the auxiliary supporting legs comprise second cross beams and at least two second supporting legs which are located below the second cross beams and connected with the second cross beams, the second supporting legs are telescopic supporting legs, the positions of the second supporting legs correspond to the positions of one transverse moving supporting leg respectively, and stepping structures which are arranged along the longitudinal direction and close to one side of the transverse moving supporting leg in an extending mode are arranged at the lower ends of the second supporting legs.
Optionally, the traverse support legs are arranged adjacently, and the first support legs are respectively arranged at the two transverse ends of the traverse support legs;
the auxiliary supporting leg further comprises a second connecting beam structure, and the second connecting beam structure is connected with the telescopic end of the second supporting leg respectively.
Optionally, the front support leg further comprises an upper support leg, the upper end of the upper support leg is connected with the body frame through a suspension wheel assembly, and the lower end of the upper support leg is arranged on the first cross beam in a transverse moving mode.
Optionally, the auxiliary leg is located forward or rearward of the front leg; the landing leg assembly further comprises a rear landing leg and a middle landing leg, the rear landing leg and the middle landing leg are arranged on the machine body frame in a longitudinally moving mode, the rear landing leg is suitable for standing on the erected longitudinal beam, and the middle landing leg is suitable for standing on the erected cover beam.
Optionally, the bridge girder erection machine further comprises a pile driving device movably arranged on the machine body frame and positioned in front of the leg assembly.
According to the bridge girder erection machine, the first cross beam of the front supporting leg longitudinally moves relative to the machine body frame to realize the longitudinal integral movement of the first supporting leg and the transverse supporting leg, the second cross beam of the auxiliary supporting leg longitudinally moves relative to the machine body frame to realize the longitudinal integral movement of each second supporting leg, the first supporting leg and the transverse supporting leg are both provided with telescopic supporting legs, and the first supporting leg and the transverse supporting leg can adapt to the height difference of different tubular piles through the respective telescopic action of the first supporting leg and the transverse supporting leg, so that the front supporting leg can be supported on the same tubular pile group which is transversely arranged, and stable support can be obtained; the second landing leg is flexible landing leg, and the position of second landing leg and sideslip landing leg is corresponding, and the lower extreme of second landing leg is provided with along vertical to extending the bit architecture of stepping on that sets up to being close to sideslip landing leg one side, and first landing leg and second landing leg can step on the different tubular piles that are supported in transversal arrangement's same tubular pile group to the landing leg switching of landing leg and supplementary landing leg before being convenient for, and still can keep the structural stability of bridging machine when the landing leg switches, the reliability is high.
In a second aspect, the present invention further provides a front leg inverting method for a bridge girder erection machine, which is used for the bridge girder erection machine of any one of the first aspect, wherein a front leg of the bridge girder erection machine is located behind an auxiliary leg of the bridge girder erection machine, and the front leg inverting method for the bridge girder erection machine comprises:
step S110, a front supporting leg of the bridge girder erection machine keeps supporting, and an auxiliary supporting leg of the bridge girder erection machine moves forwards in the longitudinal direction to be supported;
step S120, the front supporting leg moves forwards along the longitudinal direction, the transverse supporting leg of the front supporting leg moves transversely to avoid a position, and the first supporting leg and the auxiliary supporting leg of the front supporting leg are respectively supported on different tubular piles of the same tubular pile group which is transversely arranged;
step S130, the auxiliary supporting legs move forwards along the longitudinal direction, and the transverse moving supporting legs move transversely to support in place;
or the front supporting leg of the bridge girder erection machine is positioned in front of the auxiliary supporting leg of the bridge girder erection machine, and the front supporting leg inverting method of the bridge girder erection machine comprises the following steps:
step S210, a first support leg of a front support leg of the bridge girder erection machine is supported, a transverse support leg of the front support leg moves transversely to avoid a position, an auxiliary support leg of the bridge girder erection machine moves forwards to a position along the longitudinal direction, and the first support leg and the auxiliary support leg are respectively supported on different tubular piles of the same tubular pile group which is arranged transversely;
step S220, the front supporting leg moves forwards along the longitudinal direction, and the first supporting leg and the transverse moving supporting leg of the front supporting leg are supported in place;
and step S230, the auxiliary supporting leg is longitudinally moved backwards to the front of the pipe pile positioned at the rear.
The front supporting leg and auxiliary supporting leg reversing method of the bridge girder erection machine can realize the switching of the supporting positions of the front supporting legs by the matching use of the front supporting legs and the auxiliary supporting legs, can still maintain the reliable support of the front end of a frame of a machine body in the switching process, has high structural stability and reliability, and avoids the structural instability of the bridge girder erection machine possibly caused by the longitudinal forward movement of the front supporting legs to a certain extent.
In a third aspect, the present invention further provides a via-passing method for a bridge girder erection machine, which is used for the bridge girder erection machine in any one of the first aspect; the front supporting leg of the bridge girder erection machine is positioned in front of the auxiliary supporting leg of the bridge girder erection machine, and the hole passing method of the bridge girder erection machine comprises the following steps:
step S310, supporting a front supporting leg and a rear supporting leg of the bridge girder erection machine in place, and emptying an auxiliary supporting leg and a middle supporting leg of the bridge girder erection machine;
step S320, longitudinally moving a frame of the bridge girder erection machine forward;
step S330, transversely moving the transversely moving support legs of the front support legs to avoid positions, longitudinally and forwardly moving the auxiliary support legs to positions, and respectively supporting the auxiliary support legs and the first support legs of the front support legs on different tubular piles of the same tubular pile group which is transversely arranged;
step S340, the front supporting leg moves forwards along the longitudinal direction, the first supporting leg and the transverse moving supporting leg are supported in place, and the auxiliary supporting leg is emptied;
step S350, longitudinally moving the middle supporting leg to a support;
or the front supporting leg of the bridge girder erection machine is positioned behind the auxiliary supporting leg of the bridge girder erection machine, and the via hole method of the bridge girder erection machine comprises the following steps:
s410, supporting a front supporting leg and a rear supporting leg of the bridge girder erection machine in place, and emptying an auxiliary supporting leg and a middle supporting leg of the bridge girder erection machine;
step S420, the frame of the bridge girder erection machine is longitudinally moved forward to a position, and the auxiliary supporting legs are supported in the position;
step S430, the front supporting leg moves forwards to a position along the longitudinal direction, the transverse moving supporting leg of the front supporting leg moves transversely to avoid the position, and the first supporting leg and the auxiliary supporting leg of the front supporting leg are respectively supported on different tubular piles of the same tubular pile group which is transversely arranged;
step S440, the auxiliary supporting legs move forwards longitudinally to avoid positions, and the transverse moving supporting legs move transversely to support in positions;
and S450, longitudinally moving the middle supporting leg to the supporting position.
Optionally, after the step S340, before the step S350; alternatively, after the step S440, before the step S450; the via hole method of the bridge girder erection machine further comprises the following steps:
the front supporting leg and the rear supporting leg are supported, and the machine body frame transversely moves to the left end or the right end of the first cross beam relative to the first cross beam of the front supporting leg;
the longitudinal forward movement of the fuselage frame brings the piling device of the bridge girder erection machine into position.
Optionally, after the step S310, before the step S320; alternatively, after the step S410, before the step S420; the via hole method of the bridge girder erection machine further comprises the following steps:
the front leg and the rear leg remain supported and the fuselage frame traverses relative to the first cross member of the front leg to an intermediate position of the first cross member.
Optionally, the via hole method of the bridge girder erection machine further includes:
before the fuselage frame is transversely moved, the hoisting device of the bridge girder erection machine longitudinally moves forwards, and/or the piling device of the bridge girder erection machine longitudinally moves backwards;
after the fuselage frame is traversed, the lifting device is moved longitudinally backwards, and/or the piling device is moved longitudinally forwards.
The hole passing method of the bridge girder erection machine can realize the rapid hole passing operation of the bridge girder erection machine, can rapidly realize the switching of the supporting position of the front supporting leg in the hole passing process, can still maintain the reliable support of the front end of the frame of the machine body in the switching process, has high structural stability and reliability, and avoids the structural instability of the bridge girder erection machine possibly caused by the longitudinal forward movement of the front supporting leg to a certain extent; when the auxiliary supporting legs are positioned behind the front supporting legs, the cantilever stress at the front end of the frame of the bridge erecting machine can be reduced to a certain extent, and the supporting stability of the frame of the bridge erecting machine can be ensured even if the frame of the bridge erecting machine is longer and longer.
Drawings
FIG. 1 is a schematic structural diagram of a bridge girder erection machine according to an embodiment of the invention;
fig. 2 is a schematic structural view illustrating a front leg supported by a tube pile group according to an embodiment of the present invention;
FIG. 3 is another schematic structural view of a front leg according to an embodiment of the present invention;
fig. 4 is a schematic structural view illustrating the auxiliary leg supported by the tube pile group according to an embodiment of the present invention;
FIG. 5 is another schematic structural view of an auxiliary leg according to an embodiment of the present invention;
fig. 6 is a schematic structural view illustrating that the first leg and the second leg are respectively supported by different tube piles of the same tube pile group according to the embodiment of the present invention;
FIG. 7 is a schematic structural view of a front bridge girder erection machine with rear legs in place and a body frame moving laterally in accordance with an embodiment of the present invention;
FIG. 8 is a schematic structural view of the bridge girder erection machine after the body frame is laterally moved and the hoisting device is longitudinally moved backward in the embodiment of the present invention;
fig. 9 is a schematic structural view of a tubular pile rear bridge girder erection machine in which a machine body frame longitudinally moves forward to a position out of front of a front supporting leg in the embodiment of the invention;
FIG. 10 is a schematic structural view of a bridge girder erection machine in which a front leg and an auxiliary leg are supported on the same tubular pile group according to an embodiment of the present invention;
FIG. 11 is a schematic structural view of a bridge girder erection machine with a front leg supported on a next tubular pile group in a forward movement manner according to an embodiment of the present invention;
FIG. 12 is a schematic view of the upper leg of the front leg moving to the left end of the first cross member in an embodiment of the present invention;
FIG. 13 is a schematic structural view of the bridge girder erection machine after the longitudinal advance of the fuselage frame and the pile driving device in place in an embodiment of the present invention;
FIG. 14 is a schematic structural view of a rear bridge girder erection machine with middle support legs in place according to an embodiment of the present invention;
FIG. 15 is a schematic view of an auxiliary leg of a bridge girder erection machine in front of a front leg according to another embodiment of the present invention;
FIG. 16 is a flowchart illustrating a method for inverting a front leg and a rear leg of a bridge girder erection machine according to an embodiment of the present invention;
FIG. 17 is a flowchart illustrating a method for inverting a front leg of a bridge girder erection machine according to another embodiment of the present invention;
FIG. 18 is a flow chart of a via method of a bridge girder erection machine in an embodiment of the invention;
FIG. 19 is a flow chart of a via method of a bridge girder erection machine according to another embodiment of the invention.
Description of reference numerals:
1-fuselage frame, 11-main beam, 2-front leg, 21-first cross beam, 22-first leg, 23-transverse leg, 24-first transverse driving device, 25-upper leg, 26-second transverse driving device, 27-riding wheel assembly, 271-riding wheel assembly, 272-riding wheel assembly, 3-auxiliary leg, 31-second cross beam, 32-second leg, 321-stepping structure, 322-second outer guide sleeve, 323-second inner guide column, 324-second lifting driving device, 33-second connecting beam structure, 4-middle leg, 5-rear leg, 6-pile driving device, 7-hoisting device, 71-big crown block, 72-small crown block, 81-pipe pile, 82-crown block cover beam, 83-longitudinal beam.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the description of the present invention, it should be noted that terms such as "upper", "lower", "front", "rear", and the like in the embodiments indicate orientation words, which are used for simplifying the description of positional relationships based on the drawings of the specification, and do not represent that elements, devices, and the like which are referred to must operate according to specific orientations and defined operations and methods, configurations in the specification, and such orientation terms do not constitute limitations of the present invention.
Herein, a coordinate system XYZ is provided, wherein a forward direction of the X-axis represents a right direction, a reverse direction of the X-axis represents a left direction, a forward direction of the Y-axis represents a front direction, a reverse direction of the Y-axis represents a rear direction, a forward direction of the Z-axis represents an upper direction, and a reverse direction of the Z-axis represents a lower direction, a longitudinal direction, i.e. a Y-axis direction, and a lateral direction, i.e. an X-axis direction.
As shown in fig. 1, an embodiment of the present invention provides a bridge girder erection machine including a fuselage frame 1 and a leg assembly for supporting the fuselage frame 1; the leg assembly includes a front leg 2 and an auxiliary leg 3 provided to the body frame 1 to be movable in a longitudinal direction.
As shown in fig. 2 and 6, the front leg 2 includes a first cross member 21, at least two first legs 22 and at least two traverse legs 23 connected to the first cross member 21 and located below the first cross member 21, and the first legs 22 and the traverse legs 23 are telescopic legs.
As shown in fig. 4 and 6, the auxiliary leg 3 includes a second beam 31 and at least two second legs 32 located below the second beam 31 and connected to the second beam 31, the second legs 32 are telescopic legs, each second leg 32 corresponds to one of the lateral moving legs 23, and a stepping structure 321 is provided at a lower end of the second leg 32 and extends to a side close to the lateral moving leg 23 along the longitudinal direction.
In the present specification, the names of the components such as the "first beam" and the "second beam" do not limit the specific structure thereof, and for example, the "first beam" may be a beam structure formed by assembling and welding structural members, and may have a structure required to perform a corresponding function, and is not limited to a single beam.
As shown in fig. 2 and 6, the traverse leg 23 is connected to the first beam 21 and can move laterally relative to the first beam 21, and illustratively, the traverse leg 23 is slidably connected to the first beam 21, the front leg 2 further includes a first traverse driving device 24, the first traverse driving device 24 is respectively connected to the first beam 21 and the traverse leg 23, the first traverse driving device 24 is used for driving the traverse leg 23 to traverse relative to the first beam 21, and the first traverse driving device 24 may be an oil cylinder. The first leg 22 and the traversing leg 23 are similar in structure and each may include one or more lifting devices such as cylinders to perform their lifting function.
As shown in fig. 4 and 5, the second leg 32 may include a second outer guide sleeve 322, a second inner guide column 323, and a second lifting driving device 324, the second outer guide sleeve 322 is connected to the second cross beam 31, the second inner guide column 323 is slidably connected to the second outer guide sleeve 322, one end of the second lifting driving device 324 is connected to the second inner guide column 323, the other end of the second lifting driving device 324 is connected to the second cross beam 31 or the second outer guide sleeve 322, the second lifting driving device 324 is configured to drive the second inner guide column 323 to lift relative to the second outer guide sleeve 322, and the stepping structure 321 is connected to a lower end of the second inner guide column 323 and forms an L-shaped structure together.
As shown in fig. 2 and 6, the content of the present invention is described by taking an example in which the number of the first legs 22 is two, the number of the traverse legs 23 is two, the traverse legs 23 are adjacently disposed, and the two traverse legs 23 are located between the two first legs 22 in the transverse direction.
As shown in fig. 2, in one of the states, two first legs 22 and two traverse legs 23 are respectively supported on different tube piles 81 of the same tube pile group arranged in the transverse direction, wherein the two first legs 22 are respectively supported on the tube piles 81 located at both ends in the transverse direction, and the two traverse legs 23 are respectively supported on the tube piles 81 located at the middle in the transverse direction. At this time, the contact area between the front support leg 2 and the same tubular pile group arranged transversely is the largest, and the supporting effect on the fuselage frame 1 is relatively good.
In another state, as shown in fig. 6, the cross-sliding leg 23 is emptied by its lifting device, the first leg 22 is kept supported on the tube piles 81 located laterally at both ends, the auxiliary leg 3 is moved relative to the front leg 2, and the two second legs 32 of the auxiliary leg 3 are respectively supported on the two tube piles 81 located laterally in the middle, the two tube piles 81 from which the two cross-sliding legs 23 are emptied. At this time, the front leg 2 and the auxiliary leg 3 stand and are supported on different tube piles 81 of the same tube pile group arranged in the transverse direction, respectively.
In the bridge girder erection machine, the first beam 21 of the front support leg 2 longitudinally moves relative to the machine body frame 1 to realize the longitudinal integral movement of the first support leg 22 and the transverse support leg 23, the second beam 31 of the auxiliary support leg 3 longitudinally moves relative to the machine body frame 1 to realize the longitudinal integral movement of each second support leg 32, the first support leg 22 and the transverse support leg 23 are both provided with telescopic support legs, and the first support leg 22 and the transverse support leg 23 can adapt to the height difference of different tubular piles 81 through the respective telescopic action of the first support leg 22 and the transverse support leg 23, so that the front support leg 2 can be supported on the same tubular pile group which is transversely arranged, thereby obtaining stable support; the second landing leg 32 is a telescopic landing leg, the positions of the second landing leg 32 and the transverse moving landing leg 23 are corresponding, the lower end of the second landing leg 32 is provided with a stepping structure 321 which is longitudinally extended to one side close to the transverse moving landing leg 23, and the first landing leg 22 and the second landing leg 32 can be stepped on different tubular piles 81 which are supported on the same tubular pile group which is transversely arranged, so that the landing legs of the front landing leg 2 and the auxiliary landing leg 3 can be conveniently switched, the structural stability of the bridge girder erection machine can be still kept when the landing legs are switched, and the reliability is high.
As shown in fig. 2, 4 and 6, in an alternative embodiment of the bridge girder erection machine, the traverse legs 23 are adjacently arranged and the first legs 22 are respectively arranged at both lateral ends of the traverse legs 23;
the auxiliary leg 3 further comprises a second connecting beam structure 33, the second connecting beam structure 33 being connected with the telescopic ends of the second leg 32, respectively.
Specifically, both ends of the second connecting beam structure 33 are connected to the lower ends of the second inner guide pillars 323 of the second support legs 32, respectively, the second support legs 32, the second cross beams 31, and the second connecting beam structure 33 form a gantry structure, and the second support legs 32 of the auxiliary support legs 3 are supported on the middle tubular piles 81 in the same tubular pile group arranged in the transverse direction.
Therefore, the first supporting leg 22 can be supported on the pipe piles 81 at two sides in the same pipe pile group which is transversely arranged, the front support of the machine body frame 1 can be realized only through the first supporting leg 22 of the front supporting leg 2, the second supporting leg 32 of the auxiliary supporting leg 3 is supported on the pipe pile 81 in the middle in the same pipe pile group which is transversely arranged, the structure of the auxiliary supporting leg 3 is compact, the front support of the machine body frame 1 can be realized, and the stability of the front support of the machine body frame 1 is high.
In an alternative embodiment of the bridge girder erection machine, as shown in fig. 2, 3 and 6, the front leg 2 further comprises an upper leg 25, the upper end of the upper leg 25 is connected to the body frame 1 by a suspension and hanger assembly 27, and the lower end of the upper leg 25 is movably disposed in the lateral direction on the first cross member 21.
Illustratively, the fuselage frame 1 includes two longitudinally extending main beams 11 and a plurality of transversely extending main beam connecting beams, and the main beams 11 may be in a triangular truss structure, and the main beam connecting beams are respectively connected with the main beams 11 to form the fuselage frame 1.
As shown in fig. 2 and 3, the upper support leg 25 may be configured as an inverted triangle structure, the upper end of the upper support leg is provided with the idler assembly 27, the idler assembly 27 includes an idler assembly 271 and a hanging wheel assembly 272, the height of the hanging wheel assembly 272 is higher than that of the hanging wheel assembly 272, the hanging wheel assembly 272 is used for longitudinally walking on the main beam 11 when the front support leg 2 is empty so as to switch the supporting position of the front support leg 2, the idler assembly 271 is mainly used for supporting the front portion of the main beam 11, and can transmit load to the first cross beam 21 during the erecting operation of the pile driver, the cover beam 82 and the longitudinal beam 83, and can provide driving force for the longitudinal movement of the fuselage frame 1 during the hole passing operation of the bridge erecting machine.
As shown in FIG. 2, the front leg 2 further comprises a second traverse driving device 26, the upper end of the first beam 21 may be provided with a slide rail for sliding the upper leg 25, the second traverse driving device 26 is connected to the upper leg 25 and the first beam 21, respectively, and the second traverse driving device 26 is used for driving the upper leg 25 to traverse relative to the first beam 21. The second traverse driving means 26 may be an oil cylinder, which may be of the related art and will not be described in detail herein.
In this way, the front support leg 2 can support the fuselage frame 1 by the suspension wheel assembly 27, and can realize the longitudinal movement of the front support leg 2 on the fuselage frame 1; and when the front support leg 2 is supported on the same tubular pile group in transverse arrangement (through the first support leg 22 and the traverse support leg 23), the upper support leg 25 can move transversely relative to the first cross beam 21 so as to drive the fuselage frame 1 above the upper support leg 25 to move transversely, and the corresponding operation requirements are met.
In an alternative embodiment of the bridge girder erection machine, as shown in fig. 1 and 15, the auxiliary leg 3 is located in front of or behind the front leg 2; the leg assembly further comprises a rear leg 5 and a center leg 4, the rear leg 5 and the center leg 4 being longitudinally movably arranged to the fuselage frame 1, the rear leg 5 being adapted to stand on the erected stringers 83, and the center leg 4 being adapted to stand on the erected capping beams 82.
Illustratively, the tubular piles 81 along the construction advancing direction of the bridge girder erection machine are referred to as Pn-1 tubular pile group, Pn +1 tubular pile group, and Pn +2 tubular pile group … …, wherein the tubular piles 81 below the foremost erected longitudinal beam 83 are Pn-1 tubular pile group and Pn tubular pile group, respectively, and when the rear support leg 5 is supported on the erected longitudinal beam 83, the middle support leg 4 is supported on the erected cover beam 82 on the Pn +1 tubular pile group, and the front support leg 2 is supported on the Pn +3 tubular pile 81, the bridge girder erection machine can erect the cover beam 82 on the Pn +2 tubular pile group, and can erect the longitudinal beam 83 between the cover beam 82 on the Pn tubular pile group and the cover beam 82 on the Pn +1 tubular pile group, and so on.
Specifically, when the auxiliary leg 3 is located in front of the front leg 2, the stepping structure 321 extends to the rear side, and when the auxiliary leg 3 is located behind the front leg 2, the stepping structure extends to the front side.
The rear leg 5 and the middle leg 4 may be of the related art, for example, the middle leg 4 and the rear leg 5 may be of a similar structure to the front leg 2, and will not be described in detail.
Thus, in the optional embodiment, the bridge girder erection machine is provided with the front support leg 2, the auxiliary support leg 3, the middle support leg 4 and the rear support leg 5, the bridge girder erection machine can have a large span, the erection operation of the cover beam 82 and the longitudinal beam 83 can be realized, the operation range is wide, the reliability is high, and the practicability is high; and, when the auxiliary leg 3 is located the rear of preceding landing leg 2, preceding landing leg 2 is located the place ahead of auxiliary leg 3 all the time, has avoided the auxiliary leg 3 to the pressure that the cantilever structure of fuselage frame 1 caused when being located preceding landing leg 2 the place ahead, has improved the structural stability of bridging machine.
In other embodiments, the middle leg 4 may be omitted and the function of the middle leg 4 may be performed by the auxiliary leg 3, in which case the auxiliary leg 3 would be located between the front leg 2 and the rear leg 5.
In an embodiment of the invention, the bridge girder erection machine may further comprise a pile driving device 6, and the pile driving device 6 may be movably disposed at the fuselage frame 1 in front of the leg assembly.
The piling device 6 may have longitudinal, transverse and vertical movement functions, which may be related to the prior art and will not be described in detail here.
Therefore, the bridge girder erection machine has the piling function, can realize integrated piling and bridging operation, does not need to additionally arrange piling equipment for piling, has high efficiency, and particularly has higher applicability in sedimentary terrains such as lakes, sand lands, swamps and the like; in addition, when the auxiliary outrigger 3 is positioned behind the front outrigger 2, the cantilever stress at the front end of the body frame 1 of the bridge girder erection machine can be reduced to some extent, and in some cases, even if the body frame 1 is not provided with a temporary outrigger in front of the pile driving device 6, the structural stability thereof can be ensured, or the performance requirement for the temporary outrigger can be reduced.
Still another embodiment of the present invention provides a front leg inverting method of a bridge girder erection machine, which is applied to the bridge girder erection machine described in any one of the above embodiments, and the switching of the bridge girder erection machine between the tube piles 81 of the front leg 2 distributed in the longitudinal direction is realized through the front leg inverting method of the bridge girder erection machine.
As shown in fig. 16, when the front leg 2 of the bridge girder erection machine is located behind the auxiliary leg 3 of the bridge girder erection machine, the front leg inverting method of the bridge girder erection machine comprises the following steps:
and step S110, the front supporting leg 2 of the bridge girder erection machine is kept supported, and the auxiliary supporting leg 3 of the bridge girder erection machine is longitudinally moved forward to be supported.
Illustratively, the front leg 2 remains supported on the Pn +2 tube pile set and the auxiliary leg 3 is longitudinally advanced into position, supported on the Pn +3 tube pile set.
Step S120, the front supporting leg 2 moves forwards along the longitudinal direction, the transverse moving supporting leg 23 of the front supporting leg 2 moves forwards to avoid the position, and the first supporting leg 22 of the front supporting leg 2 and the auxiliary supporting leg 3 are respectively supported on different tubular piles 81 of the same tubular pile group which are transversely arranged.
Illustratively, the first leg 22 and the auxiliary leg 3 are supported on different tube piles 81 of the Pn +3 tube pile group, respectively.
In step S130, the auxiliary leg 3 is moved forward in the longitudinal direction, and the traverse leg 23 is moved to the position for supporting.
Illustratively, the auxiliary leg 3 is moved forward in the longitudinal direction to be separated from the tube pile 81 of the Pn +3 tube pile group, the traverse leg 23 is moved in the transverse direction, and the traverse leg 23 and the first leg 22 are respectively supported on different tube piles 81 of the Pn +3 tube pile group (see fig. 15).
Therefore, the supporting position switching of the front supporting leg 2 (switching from the Pn +2 pipe pile group to the Pn +3 pipe pile group) can be realized by matching the front supporting leg 2 and the auxiliary supporting leg 3, in addition, the reliable support of the front end of the machine body frame 1 can still be kept in the switching process, the structural stability and the reliability are high, and the structural instability of the bridge girder erection machine possibly caused when the front supporting leg 2 longitudinally moves forwards is avoided to a certain extent.
As shown in fig. 17, when the front leg 2 of the bridge girder erection machine is positioned in front of the auxiliary leg 3 of the bridge girder erection machine, the front leg inverting method of the bridge girder erection machine comprises:
step S210, a first leg 22 of a front leg 2 of the bridge girder erection machine is kept supported (such as being supported on a Pn +2 tubular pile group), a transverse moving leg 23 of the front leg 2 is transversely moved to avoid a position, an auxiliary leg 3 of the bridge girder erection machine is longitudinally and forwardly moved to a position, and the first leg 22 and the auxiliary leg 3 are respectively supported on different tubular piles 81 of the same tubular pile group which is transversely arranged (such as being supported on different tubular piles 81 of the Pn +2 tubular pile group);
step S220, the front leg 2 moves forwards along the longitudinal direction, and the first leg 22 and the traverse leg 23 of the front leg 2 are supported in place (for example, supported on different tubular piles 81 of a Pn +3 tubular pile group);
in step S230, the auxiliary leg 3 is moved back to the front of the rear pipe pile 81 (e.g. to the front of the Pn +2 pipe pile group) along the longitudinal direction.
At this time, the support position switching of the front support leg 2 can be realized, and in any state, the auxiliary support leg 3 is located behind the front support leg 2 and in front of the front support leg 2 relative to the auxiliary support leg 3, so that the cantilever stress at the front end of the body frame 1 of the bridge girder erection machine can be reduced to a certain extent.
As shown in fig. 18, a further embodiment of the present invention provides a via method, which is applied to the bridge girder erection machine described in any one of the above embodiments, and the via method of the front leg 2 of the bridge girder erection machine is used for implementing the via operation of the bridge girder erection machine.
Specifically, when the front leg 2 of the bridge girder erection machine is positioned in front of the auxiliary leg 3 of the bridge girder erection machine, the via hole method of the bridge girder erection machine comprises the following steps:
and S310, supporting the front supporting leg 2 and the rear supporting leg 5 of the bridge girder erection machine in place, and emptying the auxiliary supporting leg 3 and the middle supporting leg 4 of the bridge girder erection machine.
As shown in fig. 7 (the state of the middle leg 4 is not shown in fig. 7), when the front leg 2 and the rear leg 5 are in place, the front leg 2 may be supported on a Pn +2 tube pile group, the rear leg 5 may be supported on a longitudinal beam 83 above the Pn tube pile group, the rear leg 5 is positioned on the longitudinal beam 83 near the Pn tube pile group, the auxiliary leg 3 and the middle leg 4 are both in an empty state, the auxiliary leg 3 may be positioned in front of the Pn +1 tube pile group, and the middle leg 4 may be positioned above the Pn tube pile group.
Step S320, the body frame 1 of the bridge girder erection machine is longitudinally moved forward to a position.
The supporting state of the front leg 2 and the rear leg 5 is maintained, the machine body frame 1 can be driven to move forwards longitudinally through the riding wheel assemblies 271 of the riding wheel assemblies 27 on the front leg 2 and/or the rear leg 5, and the position of the Pn +3 pipe pile group is made to be the space for the next standing position of the front leg 2 (as shown in fig. 9, the state of the leg 4 in fig. 9 is not shown).
In this process, the auxiliary leg 3 may be moved back longitudinally with respect to the fuselage frame 1 in order to avoid the auxiliary leg 3 colliding with the front leg 2. Illustratively, the middle leg 4 and the auxiliary leg 3 are synchronously moved back in the longitudinal direction, so that the respective positions relative to the front leg 2 are kept unchanged. In this way, the positions of the middle leg 4 and the auxiliary leg 3 can be kept unchanged during the longitudinal movement of the fuselage frame 1, and the instability of the center of gravity of the bridge girder erection machine and the collision with other components, such as the front leg 2, which can be caused by the forward movement of the middle leg 4 and the auxiliary leg 3 along with the fuselage frame 1 can be avoided.
Step S330, the transverse moving support leg 23 of the front support leg 2 moves to avoid the position, the auxiliary support leg 3 moves forwards to the position along the longitudinal direction, and the auxiliary support leg 3 and the first support leg 22 of the front support leg 2 are respectively supported on different tubular piles 81 of the same tubular pile group which are transversely arranged.
The traversing leg 23 is free to traverse and disengage from the tube stake 81 of the Pn +2 tube stake set, the auxiliary leg 3 is advanced longitudinally and supports the tube stake 81 of the Pn +2 tube stake set with which the corresponding traversing leg 23 is disengaged, at which time the auxiliary leg 3 and the first leg 22 are supported on different tube stakes 81 of the Pn +2 tube stake set, respectively (as shown in fig. 2, 4, 6 and 10, the state of the leg 4 in fig. 10 is not shown).
Step S340, the front leg 2 moves forwards along the longitudinal direction, the first leg 22 and the traverse leg 23 are supported in place, and the auxiliary leg 3 is emptied.
After the first leg 22 of the front leg 2 is emptied, the front leg 2 is integrally moved forward to the position of the Pn +3 tubular pile group along the longitudinal direction, the first leg 22 and the traverse leg 23 are respectively supported on different tubular piles 81 of the Pn +3 tubular pile group, the auxiliary leg 3 is emptied to be separated from the tubular pile 81 of the Pn +2 tubular pile group, and the auxiliary leg 3 can be moved backward to the front of the rear tubular pile group (the front of the Pn +1 tubular pile group) along the longitudinal direction to realize avoiding (as shown in fig. 11, the state of the middle leg 4 is not shown in fig. 11).
Step S350, the middle leg 4 is longitudinally moved to the support.
Specifically, the middle leg 4 is longitudinally moved to the upper side of the Pn +1 tube pile group and is supported by the tube pile 81 of the Pn +1 tube pile group. If the middle leg 4 moves backwards synchronously along the longitudinal direction in step S320 and the position of the middle leg 4 is kept at the Pn pipe pile 81, then the middle leg 4 moves forwards along the longitudinal direction to the position above the Pn +1 pipe pile group and is supported by the Pn +1 pipe pile 81 (see fig. 14) in step S350.
As shown in fig. 19, similar to the via method of the bridge girder erection machine, when the front leg 2 of the bridge girder erection machine is located behind the auxiliary leg 3 of the bridge girder erection machine, the via method of the bridge girder erection machine comprises the following steps:
and S410, supporting the front supporting leg 2 and the rear supporting leg 5 of the bridge girder erection machine in place, and emptying the auxiliary supporting leg 3 and the middle supporting leg 4 of the bridge girder erection machine. In this step, the stepping conditions of the front leg 2 and the rear leg 5 are the same as those in step S310.
Step S420, the body frame 1 of the bridge girder erection machine longitudinally moves forward to a position, and the auxiliary supporting legs 3 are supported in place.
The supporting state of the front supporting leg 2 and the rear supporting leg 5 is kept, the machine body frame 1 can be driven to move forwards longitudinally through the supporting wheel assembly 271 of the supporting and hanging wheel assembly 27 on the front supporting leg 2 and/or the rear supporting leg 5, and the position of the Pn +3 pipe pile group is given out, namely the next standing space of the auxiliary supporting leg 3 is given out. The auxiliary leg 3 is longitudinally moved forward to the tube pile 81 supported on the Pn +3 tube pile group.
Step S430, the front support leg 2 moves forwards along the longitudinal direction, the transverse moving support leg 23 of the front support leg 2 moves forwards to avoid the position, and the first support leg 22 of the front support leg 2 and the auxiliary support leg 3 are respectively supported on different tubular piles 81 of the same tubular pile group which are transversely arranged.
The front support leg 2 is emptied and separated from the tubular pile 81 of the Pn +2 tubular pile group, the front support leg 2 is longitudinally moved forwards to the position above the Pn +3 tubular pile group, and in the process, the transverse moving support leg 23 is transversely moved to avoid the position; the first leg 22 of the front leg 2 then stands to support the tube stake 81 of the Pn +3 tube stake set except for the tube stake 81 of the auxiliary leg 3 standing.
Step S440, the auxiliary supporting legs 3 move forwards longitudinally to avoid positions, and the transverse moving supporting legs 23 move transversely to support positions.
The auxiliary supporting leg 3 is lifted off the tubular pile 81 of the Pn +3 tubular pile group and longitudinally moves forwards to avoid the position, and the transverse supporting leg 23 of the front supporting leg 2 transversely moves to the tubular pile 81 of the Pn +3 tubular pile group separated from the auxiliary supporting leg 3 and is supported on the tubular pile 81.
Step S450, the middle supporting leg 4 longitudinally moves to the supporting position.
Specifically, the middle leg 4 is longitudinally moved to the upper side of the Pn +1 tube pile group and is supported by the tube pile 81 of the Pn +1 tube pile group. If the middle leg 4 moves backward synchronously along the longitudinal direction in step S420 and the position of the middle leg 4 is maintained at the Pn pipe pile 81, the middle leg 4 moves forward along the longitudinal direction to the pipe pile 81 supported by the Pn +1 pipe pile group in step S450.
After the hole passing operation is completed, under the support of the front support leg 2, the middle support leg 4 and the rear support leg 5, the bridge girder erection machine can erect the cover beam 82 at the position of the Pn +2 pipe pile group and can erect the longitudinal beams 83 corresponding to the Pn +1 pipe pile group and the Pn +2 pipe pile group. After the operation is finished, the rear supporting leg 5 longitudinally moves forward to a position close to the middle supporting leg 4, at the moment, the original Pn +1 is changed into Pn, and the rest is done in the same way, and the next hole passing operation is continued.
The via hole method of the bridge girder erection machine can realize the rapid via hole operation of the bridge girder erection machine, can rapidly realize the switching of the supporting position of the front supporting leg 2 (from the Pn +2 pipe pile group to the Pn +3 pipe pile group) in the via hole process, can still maintain the reliable support of the front end of the frame 1 of the machine body in the switching process, has high structural stability and reliability, and avoids the structural instability of the bridge girder erection machine possibly caused by the longitudinal forward movement of the front supporting leg 2 to a certain extent; when the auxiliary supporting leg 3 is positioned behind the front supporting leg 2, the cantilever stress at the front end of the body frame 1 of the bridge girder erection machine can be reduced to a certain extent, and the supporting stability of the body frame 1 of the bridge girder erection machine can be ensured even if the body frame is longer and longer.
In an alternative embodiment of the via method of the bridge girder erection machine, after the step S340, before the step S350; alternatively, after the step S440, before the step S450; the via hole method of the bridge girder erection machine further comprises the following steps:
the front leg 2 and the rear leg 5 are supported, and the fuselage frame 1 is transversely moved relative to the first cross beam 21 of the front leg 2 to the left end or the right end of the first cross beam 21;
the longitudinal forward movement of the fuselage frame 1 brings the pile driving device 6 of the bridge girder erection machine into position.
Illustratively, the rear leg 5 is similar in structure to the front leg 2, except that the rear leg 5 is supported on the erected stringers 83, and in the case of the front leg 2, the upper leg 25 of the front leg 2 is driven to traverse to the left end with respect to the first cross member 21 by the second traverse driving device 26 (see fig. 12), and the driving of the rear leg 5 and the front leg 2 effects the traverse of the body frame 1. When the fuselage frame 1 moves to the left end of the first beam 21, the fuselage frame 1 is positioned on the left side of the bridge, which facilitates subsequent bridge erection from left to right.
The pile driving device 6 is in place, which means that it reaches the Pn +4 tube pile group, and the pile driving operation of the tube piles 81 of the Pn +4 tube pile group can be performed, during which the bridge girder erection machine can perform the operation of the cap beam 82 and the frame longitudinal beam 83 (see fig. 13).
Therefore, the subsequent piling, the operation of the frame cover beam 82 and the frame longitudinal beam 83 which may need to be carried out are fully considered in the hole passing process of the bridge girder erection machine, and the method is simple, high in efficiency and strong in practicability.
In an alternative embodiment of the via method of the bridge girder erection machine, after the step S310, the step S320 is performed; alternatively, after the step S410, before the step S420; the via hole method of the bridge girder erection machine further comprises the following steps:
the front leg 2 and the rear leg 5 remain supported and the fuselage frame 1 is traversed with respect to the first cross member 21 of the front leg 2 to an intermediate position of the first cross member 21 (fig. 2).
As for the front leg 2, the upper leg 25 of the front leg 2 is driven to traverse to an intermediate position with respect to the first cross member 21 by the second traverse driving device 26, and the driving of the rear leg 5 and the front leg 2 effects the traverse of the body frame 1.
Therefore, when the front supporting legs 2, the front auxiliary supporting legs 3 and the piling device 6 move forwards subsequently, the machine body frame 1 is located at the middle position, so that the phenomenon that the machine body frame 1 turns over due to uneven transverse stress is avoided to a certain extent, and the reliability and the stability are high.
The via hole method of the bridge girder erection machine can further comprise the following steps:
before the fuselage frame 1 is transversely moved, the hoisting device 7 of the bridge girder erection machine longitudinally moves forwards, and/or the piling device 6 of the bridge girder erection machine longitudinally moves backwards;
after the transverse displacement of the fuselage frame 1, the lifting device 7 is moved longitudinally backwards and/or the piling device 6 of the bridge girder erection machine is moved longitudinally forwards.
Illustratively, the hoisting device 7 comprises a large crown block 71 and two small crown blocks 72 for realizing various hoisting requirements, after the step S310, before the step S320 and before the transverse movement of the body frame 1, the hoisting device 7 moves to above the middle leg 4 (as shown in fig. 7), at this time, the pile driving device 6 can longitudinally move backwards to be close to the front one of the front leg 2 and the auxiliary leg 3, so that instability caused by over-bearing of the cantilever structure part at two ends of the body frame 1 when the body frame 1 moves transversely can be avoided to a certain extent. After the fuselage frame 1 is transversely moved, the hoisting device 7 is longitudinally moved backwards to the rear end of the fuselage frame 1 (as shown in fig. 8), then the piling device 6 is longitudinally moved forwards, interference on the switching of the subsequent front supporting legs 2 is avoided, and when the fuselage frame 1 is longitudinally moved, the hoisting device 7 can play a role in balancing the piling device 6 to a certain extent.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. A bridge girder erection machine, which comprises a machine body frame (1) and a leg assembly for supporting the machine body frame (1), wherein the leg assembly comprises a front leg (2) and an auxiliary leg (3) which are arranged on the machine body frame (1) in a longitudinal movement manner;
the front support leg (2) comprises a first cross beam (21), at least two first support legs (22) and at least two transverse support legs (23), wherein the at least two first support legs (22) and the at least two transverse support legs (23) are positioned below the first cross beam (21) and connected with the first cross beam (21), and the first support legs (22) and the transverse support legs (23) are telescopic support legs;
the auxiliary supporting legs (3) comprise second cross beams (31) and at least two second supporting legs (32) which are located below the second cross beams (31) and connected with the second cross beams (31), the second supporting legs (32) are telescopic supporting legs, the positions of the second supporting legs (32) correspond to the positions of the transverse moving supporting legs (23), and stepping structures (321) which are arranged on one sides of the transverse moving supporting legs (23) in a longitudinal direction in an extending mode are arranged at the lower ends of the second supporting legs (32).
2. A bridge girder erection machine according to claim 1, wherein the traverse legs (23) are arranged adjacently and the first legs (22) are respectively arranged at both lateral ends of the traverse legs (23);
the auxiliary supporting leg (3) further comprises a second connecting beam structure (33), and the second connecting beam structure (33) is connected with the telescopic end of the second supporting leg (32) respectively.
3. A bridge girder according to claim 1, wherein the front leg (2) further comprises an upper leg (25), the upper end of the upper leg (25) being connected to the fuselage frame (1) by means of a suspension-and-suspension wheel assembly (27), and the lower end of the upper leg (25) being arranged to the first beam (21) in a laterally displaceable manner.
4. A bridge girder according to claim 1, wherein the auxiliary leg (3) is located in front of or behind the front leg (2); the landing leg assembly further comprises a rear landing leg (5) and a middle landing leg (4), wherein the rear landing leg (5) and the middle landing leg (4) are arranged on the fuselage frame (1) in a longitudinally moving mode, the rear landing leg (5) is suitable for standing on an erected longitudinal beam (83), and the middle landing leg (4) is suitable for standing on an erected cover beam (82).
5. A bridge girder erection machine according to any one of claims 1 to 4, further comprising a pile driving device (6), wherein the pile driving device (6) is movably arranged at the fuselage frame (1) in front of the leg assembly.
6. A front leg inverting method of a bridge girder erection machine, which is used for the bridge girder erection machine of any one of claims 1 to 5, wherein the front leg (2) of the bridge girder erection machine is located behind the auxiliary leg (3) of the bridge girder erection machine, the front leg inverting method of the bridge girder erection machine comprises the following steps:
step S110, a front supporting leg (2) of the bridge girder erection machine keeps supporting, and an auxiliary supporting leg (3) of the bridge girder erection machine longitudinally moves forwards to a displacement support;
step S120, the front supporting leg (2) moves forwards along the longitudinal direction, the transverse moving supporting leg (23) of the front supporting leg (2) moves transversely to avoid a position, and the first supporting leg (22) and the auxiliary supporting leg (3) of the front supporting leg (2) are respectively supported on different tubular piles (81) of the same tubular pile group which are transversely arranged;
step S130, the auxiliary supporting leg (3) moves forwards along the longitudinal direction, and the transverse moving supporting leg (23) moves in place to support;
or the front supporting leg (2) of the bridge girder erection machine is positioned in front of the auxiliary supporting leg (3) of the bridge girder erection machine, and the front supporting leg inverting method of the bridge girder erection machine comprises the following steps:
step S210, a first support leg (22) of a front support leg (2) of the bridge girder erection machine keeps supporting, a transverse support leg (23) of the front support leg (2) transversely moves to avoid a position, an auxiliary support leg (3) of the bridge girder erection machine longitudinally moves forwards to a position, and the first support leg (22) and the auxiliary support leg (3) are respectively supported on different tubular piles (81) of the same tubular pile group which is transversely arranged;
step S220, the front leg (2) moves forwards along the longitudinal direction, and the first leg (22) and the traverse leg (23) of the front leg (2) are supported in place;
and step S230, the auxiliary supporting leg (3) is longitudinally moved backwards to the front of the tubular pile (81) positioned at the rear.
7. A via-hole method of a bridge girder erection machine, which is used for the bridge girder erection machine of any one of claims 1 to 5; the front supporting leg (2) of the bridge girder erection machine is positioned in front of the auxiliary supporting leg (3) of the bridge girder erection machine, and the hole passing method of the bridge girder erection machine comprises the following steps:
step S310, a front supporting leg (2) and a rear supporting leg (5) of the bridge girder erection machine are supported in place, and an auxiliary supporting leg (3) and a middle supporting leg (4) of the bridge girder erection machine are emptied;
step S320, longitudinally moving a machine body frame (1) of the bridge girder erection machine forward;
s330, transversely moving a transversely moving support leg (23) of the front support leg (2) to avoid a position, longitudinally and forwardly moving an auxiliary support leg (3) to a position, and respectively supporting the auxiliary support leg (3) and a first support leg (22) of the front support leg (2) on different tubular piles (81) of the same tubular pile group which are transversely arranged;
step S340, the front supporting leg (2) moves forwards along the longitudinal direction, the first supporting leg (22) and the traverse supporting leg (23) are supported in place, and the auxiliary supporting leg (3) is emptied;
step S350, the middle supporting leg (4) longitudinally moves to a position for supporting;
or the front supporting leg (2) of the bridge girder erection machine is positioned behind the auxiliary supporting leg (3) of the bridge girder erection machine, and the via hole method of the bridge girder erection machine comprises the following steps:
s410, supporting a front supporting leg (2) and a rear supporting leg (5) of the bridge girder erection machine in place, and emptying an auxiliary supporting leg (3) and a middle supporting leg (4) of the bridge girder erection machine;
step S420, longitudinally moving a machine body frame (1) of the bridge girder erection machine forward to a position, and supporting the auxiliary supporting legs (3) in place;
step S430, the front supporting leg (2) moves forwards to a position along the longitudinal direction, the transverse moving supporting leg (23) of the front supporting leg (2) moves transversely to avoid the position, and the first supporting leg (22) and the auxiliary supporting leg (3) of the front supporting leg (2) are respectively supported on different tubular piles (81) of the same tubular pile group which are transversely arranged;
step S440, the auxiliary supporting legs (3) move forwards longitudinally to avoid positions, and the transverse moving supporting legs (23) move transversely to support in positions;
and S450, longitudinally moving the middle supporting leg (4) to a supporting position.
8. The via method for bridge erecting machine according to claim 7, wherein after said step S340, said step S350 is performed; alternatively, after the step S440, before the step S450; the via hole method of the bridge girder erection machine further comprises the following steps:
the front leg (2) and the rear leg (5) are kept supported, and the machine body frame (1) is transversely moved to the left end or the right end of a first cross beam (21) of the front leg (2) relative to the first cross beam (21);
the longitudinal forward movement of the fuselage frame (1) brings the pile driving device (6) of the bridge girder erection machine into position.
9. The via method for bridge girder erection machine according to claim 7, wherein after said step S310, said step S320 is preceded; alternatively, after the step S410, before the step S420; the via hole method of the bridge girder erection machine further comprises the following steps:
the front leg (2) and the rear leg (5) are supported, and the fuselage frame (1) is laterally displaced relative to a first cross member (21) of the front leg (2) to an intermediate position of the first cross member (21).
10. The via method of the bridge girder erection machine according to claim 8 or 9, further comprising:
before the fuselage frame (1) is transversely moved, a hoisting device (7) of the bridge girder erection machine longitudinally moves forwards, and/or a piling device (6) of the bridge girder erection machine longitudinally moves backwards;
after the fuselage frame (1) is laterally displaced, the lifting device (7) is longitudinally displaced backwards and/or the piling device (6) is longitudinally displaced forwards.
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