A bridge girder erection machine and a method of construction thereof

Abstract

The application relates to the technical field of bridge erecting machine construction, in particular to a bridge erecting machine and a construction method thereof. The bridge erecting machine comprises a main beam, the longitudinal ends of the main beam are respectively provided with a front guide beam and a rear guide beam, the front guide beam and / or the rear guide beam comprises a plurality of jointed assembling units, and any two adjacent jointed assembling units are detachably connected; a main crane is movably arranged on at least one of the main beam, the front guide beam and the rear guide beam; a plurality of groups of hanging devices are movably connected to the main crane and are selectively hung on the main beam, the other ends of the hanging devices are fixedly connected with segment beams, and any group of the hanging devices is adapted to be cross-layer hung with adjacent hanging devices so that the segment beams are arranged in a staggered mode along the height direction; and the main crane is adapted to drive the hanging devices to move longitudinally, transversely, vertically or rotate. The bridge erecting machine can be used to successfully complete the erection of a bridge in a narrow construction site with obstacles at the bridge head.

Description

Technical Field

[0001] This invention relates to the field of bridge erection machine construction technology, specifically to a bridge erection machine and its construction method. Background Technology

[0002] A bridge erecting machine is a device that places prefabricated bridge beams onto prefabricated bridge piers.

[0003] Existing bridge erecting machines, such as the one disclosed in publication number CN203383148U, present an intra-span beam lifting device for precast small box girders. This device includes a main beam for the bridge erecting machine, with a front auxiliary support leg, a front support leg, and a middle support leg connected sequentially below the main beam. The main beam is positioned on the bridge abutment via these support legs. Two hoisting trolleys are connected above the main beam. The bridge erecting machine is mounted on the main beam. The span distance between the front outrigger and the middle outrigger of the bridge erecting machine is greater than the length of the span to be erected. The length of the span to be erected is the distance between the front cap beam and the rear cap beam. The construction method of prefabricated small box girder in the span only requires three steps: transportation of prefabricated small box girder → lifting and erection of small box girder. Compared with the traditional construction method, it reduces the steps of lifting to the bridge deck, transportation on the bridge deck, and feeding the girder. It does not require foundation treatment at the abutment or the installation of a lifting station in the span to be erected.

[0004] However, in situations where the bridge construction site is small and obstacles at the bridgehead affect the operation of the bridge erecting machine, the existing bridge erecting machine cannot extend forward to cross the span when erecting beams, making beam erection difficult. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings of existing bridge erecting machines in the prior art, which are unable to extend across the span and are difficult to erect beams when the bridge construction site is small and there are obstacles at the bridgehead. Thus, the present invention provides a bridge erecting machine and its construction method that can meet the requirements of bridge construction sites with small space and obstacles at the bridgehead.

[0006] To solve the above-mentioned technical problems, the present invention provides a bridge erecting machine, comprising:

[0007] The main beam has a front guide beam and a rear guide beam at its longitudinal ends, and the front guide beam and / or the rear guide beam includes several assembly units, and any two adjacent assembly units can be detachably connected.

[0008] The main crane is movably mounted on at least one of the main beam, the front guide beam, and the rear guide beam;

[0009] Several sets of suspensions, one end of which is suspended and moved via the main crane and is adapted to be selectively suspended on the main beam, and the other end of which is fixedly connected to the segment beam. Any set of suspensions is adapted to be suspended at staggered levels with adjacent suspensions so that the segment beams are staggered with each other in the height direction.

[0010] The main crane is adapted to drive the suspension to move longitudinally, laterally, vertically, or rotate.

[0011] Optionally, the bridge erecting machine further includes:

[0012] The first leg is fixedly mounted on the front guide beam, and the first leg is connected to the pier through the first dummy beam;

[0013] The second leg is set longitudinally on the main beam close to the leading beam, and the second leg is connected to the pier through the second dummy beam;

[0014] The third leg is disposed longitudinally on the main beam near the rear guide beam, and the third leg is adapted to be connected to the abutment;

[0015] The fourth leg is fixedly mounted on the rear guide beam and is adapted to be supported on the ground or bridge deck.

[0016] Optionally, the rear guide beam includes:

[0017] The first fixing part is disposed at one end of the rear guide beam along the longitudinal direction near the main beam;

[0018] The second fixing part is disposed at one end of the rear guide beam that is longitudinally away from the main beam;

[0019] Either the first fixing part or the second fixing part is adapted to be fixedly connected to the fourth leg.

[0020] Optionally, the fourth leg is provided with a roller mechanism, and the fourth leg is rotatably connected to the ground track through the roller mechanism; the fourth leg is also provided with a lifting mechanism, which allows the roller mechanism to switch between a suspended state and a grounded state by extending and retracting.

[0021] Optionally, a longitudinal movement mechanism is provided between the second leg and / or the third leg and the main beam, and the second leg and / or the third leg pushes the main beam to move longitudinally through the longitudinal movement mechanism;

[0022] A lateral movement mechanism is provided between the second leg and / or the third leg and the main beam, and the second leg and / or the third leg pushes the main beam to move laterally through the lateral movement mechanism.

[0023] Optionally, the suspension includes a suspension rod and a nut, the suspension rod passing through the suspension hole of the box girder and being fixed by the nut; a hard rubber pad and a pad are provided between the nut and the outer inclined wall of the box girder to prevent the suspension rod from sliding laterally relative to the box girder.

[0024] The construction method of the bridge erecting machine provided by the present invention includes:

[0025] The bridge erecting machine is positioned at the bridgehead, so that the main beam is above the Nth span of the bridge. The main gantry crane lifts the segmental beam from below the guide beam and erects the Nth span box girder.

[0026] The bridge erecting machine crosses the N+1 span of the bridge, so that the main beam is above the N+2 span. During the crossing process, the front guide beam is dismantled section by section when it encounters obstacles. The main crane lifts the segment beam from below the rear guide beam and erects the box girder of the N+2 span. The fourth leg is fixedly connected to the second fixed part of the rear guide beam.

[0027] The bridge erecting machine retracts one span, so that the main beam is above the N+1 span of the bridge. During the retraction process, the leading beam is installed section by section. The main crane lifts the segment beams from below the main beam and erects the N+1 span box girder.

[0028] Optionally, the bridge abutment passage of the bridge erecting machine includes the following steps:

[0029] The bridge erecting machine is positioned at the bridgehead, ready for the empty piers to pass through the span. The first and second dummy beams are pre-installed on abutment P. o and bridge pier P m And anchor;

[0030] The fourth leg is supported on the ground track. The main crane hoisted the third leg forward and into position. The third leg supports the main beam. The third leg is connected to the abutment P. o Anchoring;

[0031] The main crane hoisted the second leg forward and placed it in position. The second leg was supported on the first false beam and anchored to the first false beam. The first leg was then retracted and suspended in the air.

[0032] The main crane and auxiliary crane retract to above the third leg, and the third leg pushes the main beam forward through the hole into place via the longitudinal movement mechanism;

[0033] The auxiliary crane hoisted the second dummy beam across the pier to pier P. m+1 Above, the second false beam and pier P m+1 Anchoring.

[0034] Optionally, the process of erecting box girders includes:

[0035] The main crane hoisted the segmental beams one by one, and temporarily placed each segmental beam at different levels to reserve rotation space for the last segmental beam;

[0036] After the segmental beams are hoisted into place, the main crane precisely adjusts the position of each segmental beam and performs symmetrical wet joint construction one by one.

[0037] Tensioning of the entire box girder;

[0038] After the box girder is cured, the hangers are removed, and the girder erection is complete. The entire machine is ready to pass through the hole again.

[0039] Optionally, after the bridgehead of the bridge erecting machine is in place, the beam transport vehicle feeds the beam from the rear of the bridge erecting machine, and the main gantry crane lifts the box girder forward from the rear guide beam, wherein the fourth leg is fixedly connected to the first fixed part of the rear guide beam.

[0040] Optionally, the construction method of the bridge erecting machine further includes beam erection on the beam, which includes:

[0041] The bridge erecting machine spans two completed three-line beams and positions itself on the beam surface;

[0042] The beam transport vehicle transports the platform beam to the bridge site along the beam surface passage;

[0043] The main overhead crane lifted and moved the platform beam into place.

[0044] The technical solution of this invention has the following advantages:

[0045] 1. The bridge erecting machine provided by this invention comprises a main beam and its longitudinally extending front and rear guide beams forming a large cantilever structure for feeding beams in the front and rear spans. The front and / or rear guide beams are detachably connected from several assembly units. During the bridge erection process, when faced with a narrow bridge construction site and obstacles at the bridge ends, the machine can first cross a span by passing through an empty pier. During the crossing process, the assembly units of the large cantilever structure near the obstacle end are dismantled section by section, allowing the bridge erecting machine to extend forward to the span adjacent to the obstacle. During the erection process, each set of the hoisting is lifted by a crane and temporarily suspended at staggered levels on the main beam. After each segment of the beam is hoisted into place, the hoisting is readjusted by the crane to determine the position of each segment, thereby adapting to the narrow bridge erection space. After the span adjacent to the obstacle is erected, the machine retreats to the next span, and during the retreat, the assembly units are installed section by section, thus enabling smooth beam erection.

[0046] 2. The bridge erecting machine provided by the present invention has a fourth leg that is connected to the ground track by a roller mechanism, which facilitates the longitudinal and / or lateral movement of the bridge erecting machine and helps to shorten the movement time of the bridge erecting machine. When the bridge erecting machine moves, the lifting mechanism retracts and suspends the machine while the roller mechanism switches to the ground state, so that the roller mechanism can roll along the ground track, which facilitates the fourth leg to support the movement of the bridge erecting machine. After the bridge erecting machine moves to the designated position, the lifting mechanism extends and touches the ground while the roller mechanism switches to the suspended state. After the lifting mechanism touches the ground, it is anchored to the ground or the bridge deck, so that the bridge erecting machine can operate stably.

[0047] 3. The construction method of the bridge erecting machine provided by this invention, when constructing segmental box girder under conditions of obstacles at the bridgehead, involves positioning the bridge erecting machine at the bridgehead through the span, so that the main girder is above the Nth span of the bridge. The main gantry crane lifts the segmental beams from below the front guide beam and erects the Nth span box girder. The bridge erecting machine crosses the span of the N+1 span of the bridge, so that the main girder is above the N+2 span of the bridge. During the crossing process, the front guide beam is dismantled section by section when encountering obstacles ahead. The main gantry crane lifts the segmental beams from below the rear guide beam and erects the N+2 span box girder. The bridge erecting machine retracts one span, so that the main girder is above the N+1 span of the bridge. During the retraction process, the front guide beam is installed section by section. The main gantry crane lifts the segmental beams from below the main girder and erects the N+1 span box girder. This allows the bridge erecting machine to extend forward through the span in narrow construction sites with obstacles at the bridgehead, successfully completing the girder erection. Attached Figure Description

[0048] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the overall structure of the bridge erecting machine of the present invention;

[0050] Figure 2 This is a schematic diagram of the assembly unit connection of the front guide beam and / or rear guide beam of the bridge erecting machine of the present invention;

[0051] Figure 3 This is a schematic diagram of the overall structure of the fourth leg of the bridge erecting machine of the present invention;

[0052] Figure 4 This is a schematic diagram showing the connection between the second or third leg of the bridge erecting machine of the present invention and the main beam via a longitudinal movement mechanism.

[0053] Figure 5This is a schematic diagram showing the connection between the second or third leg of the bridge erecting machine of the present invention and the main beam via a transverse movement mechanism.

[0054] Figure 6 This is a schematic diagram showing the connection between the lifting device and the suspension of the bridge erecting machine of the present invention;

[0055] Figure 7 This is a schematic diagram showing the connection between the suspension system and the segmental beam of the bridge erecting machine of the present invention;

[0056] Figure 8 for Figure 7 Enlarged view of point A in the middle;

[0057] Figure 9 This is a schematic diagram of the structure of the main gantry crane of the bridge erecting machine of the present invention, which moves laterally via a lateral drive mechanism;

[0058] Figure 10 This is a schematic diagram illustrating the working principle of erecting the Nth box girder in the construction method of the bridge erecting machine of the present invention;

[0059] Figure 11 This is a schematic diagram illustrating the working principle of erecting the N+2th box girder in the construction method of the bridge erecting machine of the present invention;

[0060] Figure 12 This is a schematic diagram illustrating the working principle of erecting the N+1th box girder in the construction method of the bridge erecting machine of the present invention.

[0061] Figure 13 This is a schematic diagram illustrating the working principle of step one of the bridgehead crossing process in the construction method of the bridge erecting machine of the present invention.

[0062] Figure 14 This is a schematic diagram illustrating the working principle of step two of the bridgehead crossing in the construction method of the bridge erecting machine of the present invention;

[0063] Figure 15 This is a schematic diagram illustrating the working principle of step three, the bridgehead crossing step, in the construction method of the bridge erecting machine of the present invention.

[0064] Figure 16 This is a schematic diagram illustrating the working principle of step four, the bridgehead crossing step, in the construction method of the bridge erecting machine of the present invention.

[0065] Figure 17 This is a schematic diagram illustrating the working principle of step five, the bridgehead crossing step, in the construction method of the bridge erecting machine of the present invention.

[0066] Figure 18 This is a schematic diagram illustrating the working principle of the bridge erecting machine construction method of the present invention, in which a beam transport vehicle feeds beams from the rear of the bridge erecting machine;

[0067] Figure 19 This is a schematic diagram illustrating the working principle of the main overhead crane hoisting and temporarily placing each segment of the beam in a staggered manner in the construction method of the bridge erecting machine of the present invention;

[0068] Figure 20 This is a schematic diagram illustrating the working principle of the main gantry crane after precisely adjusting the position of each beam segment in the construction method of the bridge erecting machine of the present invention;

[0069] Figure 21 This is a schematic diagram illustrating the working principle of symmetrical wet joint construction of each beam segment in the construction method of the bridge erecting machine of the present invention.

[0070] Figure 22 This is a schematic diagram illustrating the working principle of beam erection in the construction method of the bridge erecting machine of the present invention.

[0071] Explanation of reference numerals in the attached figures:

[0072] 10. Main beam; 101. Longitudinal movement mechanism; 102. Lateral movement mechanism; 11. Front guide beam; 12. Rear guide beam; 121. First fixing part; 122. Second fixing part; 130. Assembly unit;

[0073] 20. Hanger; 201. Hanger rod; 202. Nut; 203. Hard rubber pad; 204. Pad plate;

[0074] 31. First leg; 32. Second leg; 33. Third leg; 34. Fourth leg; 341. Roller mechanism; 342. Lifting mechanism;

[0075] 41. First false beam; 42. Second false beam;

[0076] 51. Main crane; 511. Lifting device; 512. Horizontal movement drive mechanism; 52. Auxiliary crane. Detailed Implementation

[0077] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0078] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0079] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0080] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0081] Example 1

[0082] Combination Figures 1-22 As shown, the bridge erecting machine provided in this embodiment includes:

[0083] The main beam 10 has a front guide beam 11 and a rear guide beam 12 at its longitudinal ends, respectively. The front guide beam 11 and / or the rear guide beam 12 include several assembly units 130, and any two adjacent assembly units 130 can be detachably connected.

[0084] The main overhead crane 51 is movably mounted on at least one of the main beam 10, the front guide beam 11, and the rear guide beam 12;

[0085] Several sets of suspensions 20, one end of which is suspended and moved via the main crane 51 and is adapted to be selectively suspended on the main beam 10, and the other end of which is fixedly connected to the segment beam. Any set of suspensions 20 is adapted to be suspended at staggered levels with adjacent suspensions 20 so that the segment beams are staggered with each other in the height direction.

[0086] The main crane 51 is adapted to drive the suspension 20 to move longitudinally, laterally, vertically, or rotate.

[0087] It should be noted that, please refer to Figure 1 As shown, in this embodiment, the main beam 10 and its longitudinal ends, the front guide beam 11 and the rear guide beam 12, together form a large cantilever structure. This structure allows for the feeding of beams in the front and rear spans using a precast box girder construction method with empty piers and spans. This provides an alternative beam feeding method in case of obstacles in one or both directions or when the beam transport vehicle cannot pass due to site limitations. For better explanation and understanding, the guide beam located at the front end of the main beam along the construction direction is defined as the front guide beam, and the guide beam located at the rear end of the main beam along the construction direction is defined as the rear guide beam. Please refer to [link to relevant documentation]. Figure 2As shown, the front guide beam 11 and / or the rear guide beam 12 include several assembly units 130. Any two adjacent assembly units 130 can be detachably connected by bolts. During the bridge erection process, when faced with a narrow bridge construction site and obstacles at the bridge end, the bridge can pass through a span by using an empty pier. During the span crossing, the assembly units 130 of the large cantilever structure near the obstacle end are dismantled section by section so that the bridge erection machine can extend forward to the span adjacent to the obstacle. After erecting the span adjacent to the obstacle, it can retreat to the next span and install the assembly units 130 section by section during the retreat, thus enabling the bridge erection to proceed smoothly.

[0088] Optionally, the front guide beam 11 and the rear guide beam 12 are symmetrically arranged at both ends of the longitudinal direction of the main beam 10.

[0089] It should be noted that the bridge erecting machine of this invention adopts a symmetrical cantilever structure based on the large cantilever structure. Each set of hanging devices 20 and each segment beam can be detachably and fixedly connected via hangers and nuts. Please refer to [link to relevant documentation]. Figure 19 As shown, the suspension 20 is hoisted by a crane to symmetrically suspend and assemble each segment beam. Each set of suspension 20 is hoisted by the crane and temporarily suspended at staggered levels on the main beam 10 to reserve rotation space for the last segment beam in the middle. After each segment beam is hoisted into place, the suspension 20 is readjusted by the crane to accurately adjust the position of each segment beam, thus successfully solving the problem of limited space when erecting precast box girders.

[0090] In this embodiment, the main beam 10 and its longitudinal ends, the front guide beam 11 and the rear guide beam 12, together form a large cantilever structure for front and rear span beam feeding construction. The front guide beam 11 and / or the rear guide beam 12 are detachably connected from several assembly units 130. During the bridge erection process, when faced with a narrow bridge construction site and obstacles at the bridge ends, the large cantilever structure can be moved closer to the assembly unit 130 at the obstacle end during the span crossing process. The 30 sections are dismantled one by one to allow the bridge erecting machine to extend forward to the section adjacent to the obstacle. During the erection process, each set of the hanging 20 is hoisted by a crane and temporarily suspended at staggered levels on the main beam 10. After each section of the beam is hoisted into place, the hanging 20 is readjusted by the crane to determine the position of each section of the beam, thereby adapting to the narrow bridge erection space. After the section adjacent to the obstacle is erected, the machine retreats to the next section and installs the assembly unit 130 section by section during the retreat, so that the beam erection can be carried out smoothly.

[0091] Specifically, the bridge erecting machine also includes:

[0092] The first leg 31 is fixedly mounted on the front guide beam 11, and the first leg 31 is connected to the pier through the first false beam 41.

[0093] The second leg 32 is arranged longitudinally on the main beam 10 near the front guide beam 11, and the second leg 32 is connected to the pier through the second false beam 42.

[0094] The third leg 33 is arranged longitudinally on the main beam 10 near the rear guide beam 12, and the third leg 33 is adapted to be connected to the abutment;

[0095] The fourth leg 34 is fixedly mounted on the rear guide beam 12, and the fourth leg 34 is adapted to be supported on the ground or bridge deck.

[0096] It should be noted that, please refer to Figure 1 As shown, in this embodiment, the first support leg 31 can be fixedly connected to the front guide beam 11 by bolts. During the process of the empty pier passing through the hole, the first dummy beam 41 can be anchored to the front pier first, and then the first support leg 31 can be anchored to the first dummy beam 41. The second support leg 32 is movably disposed on the main beam 10. During the process of the empty pier passing through the hole, the second dummy beam 42 can be anchored to the abutment first, and then the second support leg 32 can be anchored to the second dummy beam 42. The third support leg 33 is movably disposed on the main beam 10. During the process of the empty pier passing through the hole, the third support leg 33 can be anchored to the abutment. The fourth support leg 34 can be bolted to the rear guide beam 12.

[0097] Specifically, the rear guide beam 12 includes:

[0098] The first fixing part 121 is disposed at one end of the rear guide beam 12 along the longitudinal direction near the main beam 10;

[0099] The second fixing part 122 is disposed at one end of the rear guide beam 12 that is longitudinally away from the main beam 10;

[0100] Either the first fixing part 121 or the second fixing part 122 is adapted to be fixedly connected to the fourth leg 34.

[0101] It should be noted that, please refer to Figure 1 As shown, the rear guide beam 12 has a first fixing part 121 and a second fixing part 122 at both ends in the longitudinal direction. The first fixing part 121 is disposed longitudinally close to the main beam 10, and the second fixing part 122 is disposed longitudinally away from the main beam 10. Please refer to [link to previous text]. Figures 10-12 As shown, when there are obstacles in front of the bridge construction, the fourth leg 34 can be fixedly connected to the second fixing part 122 of the rear guide beam 12, thereby providing support for the feeding beam under the bridge; please refer to Figures 13-20 As shown, when the bridge erecting machine is in normal operation, the fourth leg 34 can be fixedly connected to the first fixing part 121 of the rear guide beam 12.

[0102] Specifically, the fourth leg 34 is provided with a roller mechanism 341, and the fourth leg 34 is connected to the ground track by rolling through the roller mechanism 341; the fourth leg 34 is also provided with a lifting mechanism 342, and the lifting mechanism 342 switches the roller mechanism 341 between a suspended state and a grounded state by extending and retracting.

[0103] It should be noted that, please refer to Figure 3 As shown, in this embodiment, the fourth support leg 34 is connected to the ground track by a roller mechanism 341, which facilitates the longitudinal and / or lateral movement of the bridge erecting machine and helps to shorten the movement time of the bridge erecting machine. When the bridge erecting machine moves, the lifting mechanism 342 retracts and suspends the machine, while the roller mechanism 341 switches to the ground state, allowing the roller mechanism 341 to roll along the ground track, which facilitates the fourth support leg 34 to support the movement of the bridge erecting machine. After the bridge erecting machine moves to the designated position, the lifting mechanism 342 extends and touches the ground, while the roller mechanism 341 switches to the suspended state. After the lifting mechanism 342 touches the ground, it is anchored to the ground or the bridge deck, so that the bridge erecting machine can operate stably. The lifting mechanism 342 can be configured as a hydraulic cylinder drive or a hydraulic jack drive, which can be adjusted according to the actual situation, and will not be described in detail here.

[0104] Specifically, a longitudinal movement mechanism 101 is provided between the second leg 32 and / or the third leg 33 and the main beam 10, and the second leg 32 and / or the third leg 33 push the main beam 10 to move longitudinally through the longitudinal movement mechanism 101;

[0105] A lateral movement mechanism 102 is provided between the second leg 32 and / or the third leg 33 and the main beam 10, and the second leg 32 and / or the third leg 33 push the main beam 10 to move laterally through the lateral movement mechanism 102.

[0106] It should be noted that, please refer to Figure 4 As shown, longitudinal movement mechanisms 101 are provided between the second leg 32 and the main beam 10, and between the third leg 33 and the main beam 10. After the second leg 32 and / or the third leg 33 are anchored to the abutment and / or pier, the main beam 10 is pushed to move longitudinally by controlling the extension and retraction of the longitudinal movement mechanism 101; see also Figure 5As shown, a transverse movement mechanism 102 is provided between the second leg 32 and the main beam 10, and between the third leg 33 and the main beam 10. After the second leg 32 and / or the third leg 33 are anchored to the abutment and / or pier, the main beam 10 is pushed to move laterally by controlling the extension and retraction of the transverse movement mechanism 102. The longitudinal movement mechanism 101 and the transverse movement mechanism 102 can be configured to be driven by hydraulic cylinders, which will not be described in detail here.

[0107] Specifically, the suspension 20 includes a suspension rod 201 and a nut 202. The suspension rod 201 passes through the suspension hole of the box girder and is fixed by the nut 202. A hard rubber pad 203 and a pad plate 204 are provided between the nut 202 and the outer inclined wall of the box girder to prevent the suspension rod 201 from sliding laterally relative to the box girder.

[0108] It should be noted that, please refer to Figure 6 and Figure 7 As shown, during the symmetrical suspension assembly process, the overhead crane is fixedly connected to the suspension 20 via the lifting device 511, wherein, as... Figure 6 As shown, when the upper part of the box girder box chamber is a flat structural surface, it can be directly hoisted by fixing it with hanger 201 and nut 202. However, if... Figure 7 As shown, if the upper part of the box girder box chamber is an uneven structural surface, direct hoisting will cause lateral sliding and instability during hoisting; please refer to [link to relevant documentation]. Figure 8 As shown, the suspension 20 passes through the lifting hole of the box girder via the lifting rod 201 and is fixed by the nut 202. The inclined surface at the lifting hole is fitted with a pad 204, and a hard rubber pad 203 is provided on the contact surface for anti-slip, thereby avoiding lateral sliding and effectively preventing lifting instability.

[0109] Example 2

[0110] Combination Figures 10-17 As shown, this embodiment provides a construction method for a bridge erecting machine to address the need for segmental box girder erection under bridge approach obstacle conditions. The construction method includes:

[0111] S10, the bridge erecting machine is positioned at the bridgehead, so that the main beam 10 is above the Nth span of the bridge. The main gantry crane 51 lifts the segmental beam from below the guide beam 11 and erects the Nth span box girder.

[0112] S20. The bridge erecting machine crosses the N+1 span of the bridge, so that the main beam 10 is above the N+2 span of the bridge. During the crossing process, the front guide beam 11 is dismantled section by section when it encounters obstacles in front. The main crane 51 hoists the segment beam from below the rear guide beam 12 and erects the box girder of the N+2 span. The fourth leg 34 is fixedly connected to the second fixed part 122 of the rear guide beam 12.

[0113] S30, the bridge erecting machine retracts one span, so that the main beam 10 is above the N+1 span of the bridge. During the retraction process, the guide beam 11 is installed section by section. The main crane 51 lifts the segment beams from below the main beam 10 and erects the N+1 span box girder.

[0114] Specifically, the bridge abutment passage of the bridge erecting machine includes the following steps:

[0115] S101. The bridge erecting machine is positioned at the bridgehead, ready for the empty pier to pass through the span. The first dummy beam 41 and the second dummy beam 42 are pre-installed on the bridge abutment P. o and bridge pier P m And anchor.

[0116] S102, the fourth support leg 34 is supported on the ground track. The main overhead crane 51 hoists the third support leg 33 forward and into position. The third support leg 33 supports the main beam 10. The third support leg 33 and the abutment P o Anchoring.

[0117] S103, the main crane 51 hoists the second leg 32 forward and into position, the second leg 32 is supported on the first false beam 41 and anchored to the first false beam 41, and the first leg 31 is retracted and suspended in the air.

[0118] S104, the main crane 51 and the auxiliary crane 52 retract to above the third leg 33, and the third leg 33 pushes the main beam 10 forward through the hole into place via the longitudinal movement mechanism 101.

[0119] S105, auxiliary crane 52 spans pier to hoist the second false beam 42 to pier P. m+1 Above, the second false beam 42 and pier P m+1 Anchoring.

[0120] Specifically, the process of erecting box girders includes:

[0121] The main overhead crane 51 hoisted the segmental beams one by one, and temporarily placed each segmental beam at different levels to reserve rotation space for the last segmental beam;

[0122] After the segmental beams are hoisted into place, the main overhead crane 51 precisely adjusts the position of each segmental beam and carries out symmetrical wet joint construction one by one.

[0123] Tensioning of the entire box girder;

[0124] After the box girder is cured, the hanger 201 is removed, and the girder erection is completed. The whole machine is ready to pass through the hole again.

[0125] It should be noted that, please refer to Figure 21 As shown, the main overhead crane 51 hoists the segmental beams segment by segment, and the specific hoisting sequence is "front 1", "rear 1", "front 2", "rear 2", "front 3", "rear 3", "front 4", "rear 4", as follows. Figure 19As shown, during the hoisting process, the various segment beams were temporarily placed on the main beam in a staggered manner to allow for rotation space for the last segment beam, "Middle 5"; see also Figure 21 As shown, after the segmental beams are hoisted into place, the main overhead crane 51 precisely adjusts the position of each segmental beam and performs symmetrical wet joint construction one by one. The specific sequence of the "symmetrical wet joint construction one by one" is between "front 1" and "front 2", between "rear 1" and "rear 2", between "front 2" and "front 3" and between "rear 2" and "rear 3", between "front 3" and "front 4" and between "rear 3" and "rear 4", between "front 4" and "middle 5" and between "rear 4" and "middle 5", which facilitates the subsequent tensioning of the entire box girder. The wet joint construction includes hoisting the construction platform, tying the reinforcing bars, setting up the formwork, and pouring concrete, which will not be described in detail here.

[0126] The construction method of the bridge erecting machine of the present invention, when constructing segmental box girder under the condition of obstacles at the bridgehead, involves positioning the bridge erecting machine at the bridgehead through the span, so that the main beam 10 is above the Nth span of the bridge. The main gantry crane 51 hoists the segmental beams from below the front guide beam 11 and erects the Nth span box girder. The bridge erecting machine crosses the span to the N+1th span of the bridge, so that the main beam 10 is above the N+2th span of the bridge. During the crossing process, the front guide beam 11 is dismantled section by section when encountering obstacles ahead. The main gantry crane 51 hoists the segmental beams from below the rear guide beam 12 and erects the N+2th span box girder. The bridge erecting machine retreats one span, so that the main beam 10 is above the N+1th span of the bridge. During the retreat, the front guide beam 11 is installed section by section. The main gantry crane 51 hoists the segmental beams from below the main beam 10 and erects the N+1th span box girder. This allows the bridge erecting machine to extend forward through the span in narrow construction sites with obstacles at the bridgehead, successfully completing the girder erection.

[0127] Example 3

[0128] Combination Figures 13-20 As shown, this embodiment provides a construction method for a bridge erecting machine, which is used to meet the construction requirements for segmental box girder erection under normal construction conditions.

[0129] Specifically, after the bridgehead of the bridge erecting machine is in place, the beam transport vehicle feeds the beam from the rear of the bridge erecting machine, and the main overhead crane 51 lifts the box girder forward from the rear guide beam 12. The fourth support leg 34 is fixedly connected to the first fixing part 121 of the rear guide beam 12.

[0130] The construction method of the bridge erecting machine in this embodiment is described in detail below:

[0131] Step S1: The bridge erecting machine is positioned at the bridgehead, preparing for the empty pier to pass through the span. The first dummy beam 41 and the second dummy beam 42 are pre-installed on the bridge abutment P. o and bridge pier P m And anchor.

[0132] Step S2: The fourth support leg 34 is supported on the ground track. The main crane 51 hoists the third support leg 33 forward and into position. The third support leg 33 supports the main beam 10. The third support leg 33 and the abutment P are connected. o Anchoring.

[0133] Step S3: The main crane 51 hoists the second leg 32 forward and into position. The second leg 32 is supported on the first dummy beam 41 and anchored to the first dummy beam 41. The first leg 31 is retracted and suspended in the air.

[0134] In step S4, the main crane 51 and the auxiliary crane 52 retract to above the third support leg 33, and the third support leg 33 pushes the main beam 10 forward through the hole into place via the longitudinal movement mechanism 101.

[0135] Step S5: The auxiliary crane 52 lifts the second dummy beam 42 from pier P to pier P. m+1 Above, the second false beam 42 and pier P m+1 Anchoring.

[0136] Step S6: The beam transport vehicle feeds the beam from the rear of the bridge erecting machine, and the main overhead crane 51 lifts the box girder forward from the rear guide beam 12. The fourth support leg 34 is fixedly connected to the first fixed part 121 of the rear guide beam 12.

[0137] Step S7: The main crane 51 hoists the segmental beams one by one and temporarily places each segmental beam at different levels to reserve rotation space for the last segmental beam.

[0138] Step S8: After the main crane 51 precisely adjusts the position of each beam segment, wet joint construction and subsequent tensioning of the entire box girder are carried out; after the box girder is cured, the hanger 201 is released, and the girder erection is completed. The whole machine is ready to pass through the hole again.

[0139] Example 4

[0140] Combination Figures 10-22 As shown in the figure, this embodiment provides a construction method for a bridge erecting machine to meet the requirements of beam erection construction.

[0141] It should be noted that beam-on-beam erection involves using precast beams that have already been erected to continue erecting precast beams on top of them. Specifically, the bridge structure has three-line beams on both sides and a platform beam in the middle. Since the platform beam is higher than the three-line beams, the beam-on-beam erection method must be used for construction. The erection of the three-line beams is similar to the specific principles and steps in Embodiments 2 and 3, and will not be repeated here.

[0142] Specifically, the construction method of the bridge erecting machine also includes beam erection on the beam, which includes:

[0143] The bridge erecting machine spans two completed three-line beams and positions itself on the beam surface;

[0144] The beam transport vehicle transports the platform beam to the bridge site along the beam surface passage;

[0145] The main overhead crane 51 hoisted and moved the platform beam into place.

[0146] Optionally, the main crane 51 is driven by a lateral movement drive mechanism 512 to lift the platform beam into position.

[0147] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A bridge erecting machine, characterized in that, include: The main beam (10) has a front guide beam (11) and a rear guide beam (12) respectively at its longitudinal ends. The front guide beam (11) and / or the rear guide beam (12) include several assembly units (130), and any two adjacent assembly units (130) can be detachably connected. The main crane (51) is movably mounted on at least one of the main beam (10), the front guide beam (11), and the rear guide beam (12); Several sets of suspensions (20), one end of which is suspended and moved via the main crane (51) and is adapted to be selectively suspended on the main beam (10), and the other end of which is fixedly connected to the segment beam. Any set of suspensions (20) is adapted to be suspended in a staggered manner with the adjacent suspensions (20) so that the segment beams are staggered with each other in the height direction; The main crane (51) is adapted to drive the suspension (20) to move longitudinally, laterally, vertically, or rotate. The main beam (10) and the front guide beam (11) and the rear guide beam (12) at its longitudinal ends together form a large cantilever structure. During the bridge erection process, when the bridge construction site is narrow and there are obstacles at the bridge end, the bridge can be crossed by passing through a hole with an empty pier. During the crossing process, the assembly unit (130) of the large cantilever structure near the obstacle end is dismantled section by section so that the bridge erection machine can extend forward to the hole adjacent to the obstacle. After the hole adjacent to the obstacle is erected, the bridge can be retreated to the next hole. During the retreat process, the assembly unit (130) is installed section by section, so that the bridge erection can be carried out smoothly.

2. The bridge erecting machine according to claim 1, characterized in that, Also includes: The first leg (31) is fixedly mounted on the front guide beam (11), and the first leg (31) is connected to the pier through the first false beam (41); The second leg (32) is arranged longitudinally on the main beam (10) close to the leading beam (11), and the second leg (32) is connected to the pier through the second false beam (42); The third leg (33) is arranged longitudinally on the main beam (10) close to the rear guide beam (12), and the third leg (33) is adapted to be connected to the abutment; The fourth leg (34) is fixedly mounted on the rear guide beam (12) and is adapted to be supported on the ground or bridge deck.

3. The bridge erecting machine according to claim 2, characterized in that, The rear guide beam (12) includes: The first fixing part (121) is disposed at one end of the rear guide beam (12) along the longitudinal direction near the main beam (10); The second fixing part (122) is disposed at one end of the rear guide beam (12) that is longitudinally away from the main beam (10); Either the first fixing part (121) or the second fixing part (122) is adapted to be fixedly connected to the fourth leg (34).

4. The bridge erecting machine according to claim 2, characterized in that, The fourth leg (34) is provided with a roller mechanism (341), and the fourth leg (34) is connected to the ground track by the roller mechanism (341); the fourth leg (34) is also provided with a lifting mechanism (342), and the lifting mechanism (342) switches the roller mechanism (341) between a suspended state and a grounded state by extending and retracting.

5. The bridge erecting machine according to any one of claims 2-4, characterized in that, A longitudinal movement mechanism (101) is provided between the second leg (32) and / or the third leg (33) and the main beam (10), and the second leg (32) and / or the third leg (33) push the main beam (10) to move longitudinally through the longitudinal movement mechanism (101); A transverse mechanism (102) is provided between the second leg (32) and / or the third leg (33) and the main beam (10), and the second leg (32) and / or the third leg (33) push the main beam (10) to move laterally through the transverse mechanism (102).

6. The bridge erecting machine according to claim 1, characterized in that, The suspension (20) includes a suspension rod (201) and a nut (202). The suspension rod (201) passes through the suspension hole of the box girder and is fixed by the nut (202). A hard rubber pad (203) and a pad plate (204) are provided between the nut (202) and the outer inclined wall of the box girder to prevent the suspension rod (201) from sliding laterally relative to the box girder.

7. A construction method for a bridge erecting machine, characterized in that, include: The bridge erecting machine is positioned at the bridgehead, so that the main beam (10) is above the Nth span of the bridge. The main crane (51) lifts the segmental beam from below the guide beam (11) and erects the Nth span box girder. The bridge erecting machine crosses the N+1 span of the bridge, so that the main beam (10) is above the N+2 span of the bridge. During the crossing process, the front guide beam (11) is dismantled section by section when it encounters obstacles in front. The main crane (51) lifts the segment beam from below the rear guide beam (12) and erects the N+2 span box girder. The fourth leg (34) is fixedly connected to the second fixed part (122) of the rear guide beam (12). The bridge erecting machine retracts one span, so that the main beam (10) is above the N+1 span of the bridge. During the retraction process, the leading beam (11) is installed section by section. The main crane (51) lifts the segment beams from below the main beam (10) and erects the N+1 span box girder.

8. The construction method of the bridge erecting machine according to claim 7, characterized in that, The bridge abutment passage of the bridge erecting machine includes the following steps: The bridge erecting machine is positioned at the bridgehead, ready for the empty pier to pass through the span. The first dummy beam (41) and the second dummy beam (42) are pre-installed on the bridge abutment P. o and bridge pier P m And anchor; The fourth leg (34) is supported on the ground track. The main crane (51) hoists the third leg (33) forward and into position. The third leg (33) supports the main beam (10). The third leg (33) and the abutment P o Anchoring; The main crane (51) hoists the second leg (32) forward and into position. The second leg (32) is supported on the first false beam (41) and anchored to the first false beam (41). The first leg (31) is retracted and suspended in the air. The main crane (51) and the auxiliary crane (52) retract to above the third leg (33), and the third leg (33) pushes the main beam (10) forward through the hole to the position via the longitudinal movement mechanism (101); The auxiliary crane (52) hoisted the second dummy beam (42) across the pier to pier P. m+1 Above, the second false beam (42) and pier P m+1 Anchoring.

9. The construction method of the bridge erecting machine according to claim 7 or 8, characterized in that, The process of erecting box girders includes: The main crane (51) hoists the segment beams one by one and temporarily places each segment beams at different levels to reserve rotation space for the last segment beam; After the segmental beams are hoisted into place, the main crane (51) precisely adjusts the position of each segmental beam and carries out symmetrical wet joint construction one by one; Tensioning of the entire box girder; After the box girder is cured, the hanger rod (201) is removed, and the girder erection is completed. The whole machine is ready to pass through the hole again.

10. The construction method of the bridge erecting machine according to claim 9, characterized in that, After the bridgehead of the bridge erecting machine is in place, the beam transport vehicle feeds the beam from the rear of the bridge erecting machine, and the main crane (51) lifts the box girder forward from the rear guide beam (12). The fourth leg (34) is fixedly connected to the first fixed part (121) of the rear guide beam (12).

11. The construction method of the bridge erecting machine according to claim 10, characterized in that, It also includes beam-on-beam support, which includes: The bridge erecting machine spans two completed three-line beams and positions itself on the beam surface; The beam transport vehicle transports the platform beam to the bridge site along the beam surface passage; The main crane (51) hoisted the platform beam and moved it into place.

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