CN114875810A - Bridge erecting method - Google Patents
Bridge erecting method Download PDFInfo
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- CN114875810A CN114875810A CN202210496923.5A CN202210496923A CN114875810A CN 114875810 A CN114875810 A CN 114875810A CN 202210496923 A CN202210496923 A CN 202210496923A CN 114875810 A CN114875810 A CN 114875810A
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- erecting
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
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- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a bridge erecting method, which relates to the technical field of bridges, and comprises the following steps: s1, erecting prefabricated piers according to bridge information, and installing an initial block on the prefabricated pier between the first prefabricated pier and the last prefabricated pier; s2, mounting the bridge girder erection machine, so that one leg of the bridge girder erection machine is supported on the first prefabricated bridge pier, and the other two legs of the bridge girder erection machine are respectively supported on the starting blocks beside the first prefabricated bridge pier; s3, simultaneously erecting section beams on two sides of the starting block with the support legs standing in the middle through the bridge erecting machine until the assembly of one cantilever beam is completed, and S4, adjusting the bridge erecting machine to enter a via hole preparation state; s5, controlling the bridge girder erection machine to carry out hole passing operation; 56. and repeating the steps S3 to S5 until all the cantilever beams are erected, and closing two adjacent cantilever beams. The invention effectively reduces the whole erection time of the bridge.
Description
Technical Field
The invention relates to the technical field of bridges, in particular to a bridge erecting method.
Background
In recent years, the construction of bridges is rapidly developed, and bridges can be erected on mountain stream or positions meeting traffic requirements instead of being erected on rivers, lakes and seas. At present, bridge construction mostly adopts the mode of bridge girder erection machine handling precast beam, and in the work progress, bridge girder erection machine erects in proper order on prefabricated pier along bridge erection direction handling precast beam, because precast beam need support on two adjacent piers, so precast beam's is bulky, weight is heavier, has increaseed the transportation degree of difficulty, the handling degree of difficulty and has erect the degree of difficulty, finally leads to the whole erection time of bridge long, and the efficiency of construction is slow.
Disclosure of Invention
In view of the above, the present invention provides a bridge erecting method that effectively solves at least one of the above problems.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method of erecting a bridge, comprising:
s1, erecting prefabricated piers according to bridge information, and installing an initial block on the prefabricated pier between the first prefabricated pier and the last prefabricated pier;
s2, mounting the bridge girder erection machine, so that one leg of the bridge girder erection machine is supported on the first prefabricated bridge pier, and the other two legs of the bridge girder erection machine are respectively supported on the starting blocks beside the first prefabricated bridge pier;
s3, erecting section beams on two sides of the starting block with the support legs standing in the middle simultaneously through the bridge erecting machine until the assembly of a cantilever beam is completed,
s4, adjusting the bridge girder erection machine to enter a via hole preparation state;
s5, controlling the bridge girder erection machine to carry out hole passing operation;
and S6, repeating the steps S3 to S5 until all the cantilever beams are erected, and closing two adjacent cantilever beams.
Optionally, after installing an initial block on the precast pier between the first precast pier and the last precast pier, the method further includes:
tensile ties are placed under both sides of the originating block to prevent the originating block from tipping over.
Optionally, the bridge girder erection machine includes a main girder, a first crown block, a second crown block, a first leg, a second leg and a third leg, the first leg, the second leg and the third leg support the main girder along a length direction of the main girder, the first crown block and the second crown block are slidably disposed on the main girder, and the main girder includes two main girder trusses and a parallel truss connecting ends of the two main girder trusses; the mounting frame bridge crane comprises:
hoisting the first support leg to a first prefabricated pier for fixing, and hoisting the second support leg and the third support leg to the starting block on a second prefabricated pier for fixing;
hoisting the two main girder trusses to the first support leg, the second support leg and the third support leg for fixing, and hoisting the parallel truss trusses to the ends of the two main girder trusses for fixing;
installing the first crown block and the second crown block on the two main beam trusses;
the first supporting leg, the second supporting leg, the third supporting leg, the main beam, the first crown block and the second crown block are respectively provided with corresponding hydraulic electric equipment and are debugged.
Optionally, the simultaneously erecting, by the bridge erecting machine, the segment girders on both sides of the starting block on which the outrigger stands in the middle until completing the assembling of one outrigger comprises:
s301, conveying the section beam to two sides of the starting block where the support leg stands in the middle through a first crown block and a second crown block of the bridge girder erection machine respectively;
s302, splicing two sections of the section beams on two sides of the starting block where the supporting legs stand in the middle;
s303, adjusting the positions of the bridge girder erection machine corresponding to the supporting legs to assemble the segmental girders next time;
s304, repeating the steps S301 to S303 until the assembly of one cantilever beam is completed.
Optionally, during the erection process of the bridge girder erection machine, the position of the center line of the bridge girder erection machine relative to the center line of the bridge is adjusted so that the traverse travel range of the first crown block and the second crown block meets a preset travel range.
Optionally, the adjusting the bridge girder erection machine to enter a via preparation state includes:
acquiring a maximum deviation value between a central line of a bridge girder erection machine and a central line of the bridge;
and when the maximum deviation value is larger than the preset deviation value, adjusting the position of the central line of the bridge girder erection machine relative to the central line of the bridge.
Optionally, the controlling the bridge girder erection machine to perform the via hole operation includes:
adjusting the bridge girder erection machine to enter a pushing preparation state;
and pushing the main beam of the bridge girder erection machine in multiple sections until the bridge girder erection machine completes the hole passing operation.
Optionally, the adjusting the bridge girder erection machine into a pushing preparation state comprises:
moving the second leg from the center of the first originating block toward the third leg by a first preset distance and then fixing the second leg;
moving the first crown block to a side of the second leg facing the first leg, and moving the second crown block to a side of the first leg facing the second leg;
moving the third leg to the end of the cantilever beam remote from the first leg and the second leg to a central position of a first one of the origination blocks;
moving a first crown block to the third leg and the first leg to a first one of the origination blocks,
moving the second crown block to a side of the second leg toward the third leg,
moving the second leg onto the section beam beside the third leg and moving the first crown block beside the second crown block.
Optionally, the pushing of the girder of the bridge girder erection machine by the multiple sections until the bridge girder erection machine completes the via hole operation includes:
after the main beam is pushed for a second preset distance, a temporary supporting leg is installed on the main beam, so that the temporary supporting leg is supported on a second starting block;
moving the third leg to a second one of the origination blocks, detaching the temporary support, and moving the first crown block and the second crown block to the side of the third leg;
continuously pushing the main beam until the first support leg is separated from the main beam, mounting the temporary support leg on the main beam, and mounting the first support leg on a third initial block or the last pier;
continuously pushing the main beam to enable the main beam to drive the temporary support leg to move until the main beam moves to the first support leg and is fixed, and adjusting the positions of the first crown block and the second crown block to prevent the main beam from overturning in the pushing process;
and adjusting the bridge girder erection machine to enter an erection preparation state so as to finish the hole passing operation.
Optionally, the adjusting the bridge girder erection machine into an erection ready state comprises:
moving the second crown block of the first crown block to the side of the first leg;
moving said second leg to a second of said origination blocks and removing said temporary leg;
and moving the third support leg to the central position of the second starting block, and pushing the main beam to be in place and leveled so as to promote the bridge girder erection machine to enter a erection preparation state.
Compared with the prior art, the invention has the beneficial effects that:
when the bridge is erected, erecting prefabricated bridge piers according to bridge information, and installing an initial block on the prefabricated bridge pier between a first prefabricated bridge pier and a last prefabricated bridge pier; installing a bridge girder erection machine so that one support leg of the bridge girder erection machine is supported on the first prefabricated bridge pier, and the other two support legs of the bridge girder erection machine are respectively supported on the starting blocks beside the first prefabricated bridge pier; then, erecting section beams on two sides of an initial block on which a middle support leg stands simultaneously by a bridge erecting machine until the assembly of a cantilever beam is completed, and adjusting the bridge erecting machine to enter a via hole preparation state; and then, after the bridge girder erection machine is controlled to carry out hole passing operation, the assembly of the next cantilever beam is continued until all the cantilever beams are erected, and the two adjacent cantilever beams are closed. Compared with the existing bridge erecting method that the bridge erecting machine hoists the prefabricated beams along the bridge erecting direction to be erected on the prefabricated bridge piers in sequence, the bridge erecting method provided by the invention has the advantages that the volume of the segmental beam is small, the weight is light, the transportation difficulty, the hoisting difficulty and the erecting difficulty are reduced, and the integral erecting time of the bridge is effectively shortened.
Drawings
FIG. 1 is a schematic flow chart illustrating one embodiment of a bridge erecting method according to the present invention;
FIG. 2 is a schematic view of the bridge girder erection machine of the present invention standing on a pier;
FIG. 3 is a schematic view of the bridge girder erection machine of the present invention;
FIG. 4 is a schematic view illustrating the first leg of the bridge girder erection machine of the present invention being disassembled during the process of via-passing operation;
fig. 5 is a schematic diagram of the bridge girder erection machine of the present invention in a state of via hole operation.
Description of reference numerals:
1. a main beam; 2. a first leg; 3. a second leg; 4. a third leg; 5. a first crown block; 6. a second crown block; 7. prefabricating a bridge pier; 8. a cantilever beam; 81. an originating block; 82. a segment beam; 9. pulling the bundle; 10. and (4) auxiliary supporting legs.
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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
As shown in fig. 1, a bridge erecting method according to an embodiment of the present invention includes:
s1, erecting the prefabricated piers 7 according to the bridge information, and installing starting blocks 81 on the prefabricated piers 7 between the first prefabricated pier 7 and the last prefabricated pier 7;
s2, mounting the bridge girder erection machine, so that one leg of the bridge girder erection machine is supported on the first prefabricated pier 7, and the other two legs of the bridge girder erection machine are respectively supported on the starting block 81 beside the first prefabricated pier 7;
s3, erecting the segment beams 82 on both sides of the starting block 81 on which the middle leg stands simultaneously by the bridge erecting machine until the assembling of one cantilever beam 8 is completed,
s4, adjusting the bridge girder erection machine to enter a via hole preparation state;
s5, controlling the bridge girder erection machine to carry out hole passing operation;
and S6, repeating the steps S3 to S5 until all the cantilever beams 8 are erected, and closing the two adjacent cantilever beams 8.
After the bridge erection method is adopted, when the bridge is erected, the prefabricated bridge piers 7 are erected according to bridge information, and the starting block 81 is installed on the prefabricated bridge pier 7 between the first prefabricated bridge pier 7 and the last prefabricated bridge pier 7; installing a bridge girder erection machine so that one support leg of the bridge girder erection machine is supported on the first prefabricated pier 7, and the other two support legs of the bridge girder erection machine are respectively supported on an initial block 81 beside the first prefabricated pier 7; then, erecting section beams 82 on two sides of a starting block 81 on which a middle support leg stands simultaneously by a bridge erecting machine until the assembly of one cantilever beam 8 is completed, and then adjusting the bridge erecting machine to enter a via hole preparation state; and then, after the bridge girder erection machine is controlled to carry out hole passing operation, the assembly of the next cantilever beam 8 is continued until all the cantilever beams 8 are erected, and the two adjacent cantilever beams 8 are closed. The bridge erecting method provided by the invention adopts a cantilever assembling mode, not only can solve the problems of line crossing and obstacle crossing, and incapability of transporting to place for lifting and hoisting in a span, but also can carry out hole passing operation after the bridge erecting machine completes the erection of one cantilever beam, and does not need to disassemble the bridge erecting machine to the next construction point for installation, so that the construction period and the cost for installing and disassembling the bridge erecting machine again are saved. Compared with the existing bridge erecting method that the bridge erecting machine hoists the prefabricated beams along the bridge erecting direction to be sequentially erected on the prefabricated bridge piers 7, the segmental beam 82 is small in size and light in weight, reduces the transportation difficulty, the hoisting difficulty and the erecting difficulty, and effectively reduces the overall bridge erecting time.
Optionally, the bridge information includes drawing information of the bridge, and erecting prefabricated pier 7 according to the bridge information includes: and determining the position information of the prefabricated pier 7 according to the drawing information, and installing the prefabricated pier 7 according to the position information of the prefabricated pier 7.
In this embodiment, the prefabricated bridge pier 7 is prefabricated, and is prepared in advance in a beam field, and the erection of the bridge pier can be accelerated compared with a cast-in-place bridge pier.
It should be understood that, when the whole bridge is a straight line, that is, the bridge is a straight line bridge, the positions of the plurality of prefabricated piers 7 are maintained in the same straight line; when the whole bridge is curved, namely the bridge is a curved bridge, the prefabricated bridge sections are not positioned on the same straight line; when the bridge part is a straight line and the bridge part is a curve, part of the prefabricated piers 7 are located on the same straight line, and part of the prefabricated piers 7 are not located on the same straight line.
Optionally, after installing the starting block 81 on the prefabricated pier 7 between the first prefabricated pier 7 and the last prefabricated pier 7, the method further comprises:
In this embodiment, after the starting block 81 is erected on the prefabricated pier 7, the whole body is T-shaped, and since the two sides of the starting block 81 need to be assembled with the segmental beams 82, the cantilever becomes longer and longer in the erecting process, and the risk of overturning is slightly generated carelessly, so the tensile beams 9 are arranged below the two sides of the starting block 81 in this embodiment, and the tensile beams 9 are anchored on the ground, thereby preventing the starting block 81 from overturning.
Further, the origin block 81 is movable up and down around the pier within a certain range when installed on the pier, thereby adjusting the inclination angle of the cantilever 8. Therefore, one end of the tensile strand 9 anchored to the ground is wound around the hoist, and thus the angle of the starting block 81 with respect to the precast pier 7 can be realized by retracting the tensile strand 9 by the hoist.
Optionally, as shown in fig. 2 to 5, the bridge girder erection machine includes a main girder 1, a first crown block 5, a second crown block 6, a first leg 2, a second leg 3, and a third leg 4, the first leg 2, the second leg 3, and the third leg 4 support the main girder 1 along a length direction of the main girder 1, the first crown block 5 and the second crown block 6 are slidably disposed on the main girder 1, and the main girder 1 includes two main girders 1 and a parallel truss connecting girder ends of the two main girders 1; the mounting frame bridge crane includes:
hoisting the first support leg 2 to a first prefabricated pier 7 for fixing, hoisting the second support leg 3 and the third support leg 4 to an initial block 81 on a second prefabricated pier 7 for fixing;
hoisting and transporting the two main girder trusses to a first supporting leg, a second supporting leg and a third supporting leg for fixing, and hoisting and transporting the parallel truss to the end parts of the two main girder trusses for fixing;
mounting a first crown block 5 and a second crown block 6 on two main beam trusses;
corresponding hydraulic and electric equipment is respectively installed on the first supporting leg 2, the second supporting leg 3, the third supporting leg 4, the main beam 1, the first crown block 5 and the second crown block 6, and debugging is carried out.
In this embodiment, the bridge girder erection machine is in a disassembled state in advance, so that the transportation is convenient, and the risk brought by the hoisting of the whole bridge girder erection machine can be avoided. The installation bridging machine of this embodiment is realized through the portal crane, specifically, three landing legs through the portal crane first handling bridging machine to the assigned position, be about to first landing leg 2 hoist to fix on first prefabricated pier 7, hoist second landing leg 3 and third landing leg 4 to fix on the piece 81 of initiating on the second prefabricated pier 7, wherein, second landing leg 3 is fixed in the central point of the piece 81 of initiating, the rethread portal crane realizes the installation of first overhead traveling crane 5 and second overhead traveling crane 6 on girder 1 and girder 1, install corresponding hydraulic electric equipment again at last.
Alternatively, simultaneously erecting the section beams 82 on both sides of the starting block 81 on which the middle leg stands by the bridge girder erection machine until the completion of the erection of one cantilever beam 8 comprises:
s301, respectively conveying the section beams 82 to two sides of an originating block 81 where a middle supporting leg stands through a first crown block 5 and a second crown block 6 of the bridge girder erection machine;
s302, splicing two sections of segmental beams 82 on two sides of an initial block 81 on which a middle supporting leg stands;
s303, adjusting the positions of the corresponding support legs of the bridge girder erection machine to assemble the segmental girder 82 at the next time;
and S304, repeating the steps S301 to S303 until the assembly of the cantilever beam 8 is completed.
It should be noted that, during erection, the section beam 82 is lifted from the side of the side span, because the width of the section beam 82 is greater than the passing space reserved by the supporting legs, and the length of the section beam 82 is less than the passing space reserved by the supporting legs, in the process that the first crown block 5 lifts the section beam 82 from one end of the main beam 1 close to the side span side to the other end, when the section beam needs to pass through the supporting legs of the bridge erecting machine, the section beam 82 can pass through the supporting legs by rotating the section beam 82, and after the first crown block 5 lifts the section beam 82 to a certain distance, the second crown block 6 lifts the section beam 82 to realize the stability of the bridge erection.
Meanwhile, the first support leg 2, the second support leg 3 and the third support leg 4 are all telescopic support legs, and when the gradient of the beam surface of the section beam 82 changes, the first support leg 2, the second support leg 3 and the third support leg 4 can be stably supported on the corresponding section beam 82 by changing the length of the first support leg 2, the second support leg 3 and the third support leg 4.
In this embodiment, in the erection process of the bridge girder erection machine, the position of the central line of the bridge girder erection machine relative to the central line of the bridge is adjusted so that the traverse travel range of the first crown block 5 and the second crown block 6 meets the preset travel range. The method is mainly suitable for erecting the curved bridge, and the linear type of the curved bridge is a curve, so that the position of the central line of the bridge erecting machine relative to the central line of the bridge needs to be adjusted in the process of erecting the bridge erecting machine so as to enable the transverse moving stroke range of the first crown block 5 and the second crown block 6 to meet the preset stroke range. Since the zero point positions of the first crown block 5 and the second crown block 6 are at the central line position of the main beam 1, the preset travel range is ± 500 mm.
In one embodiment, 10 segmental beams 82 are respectively assembled on two sides of the starting block 81, and along the erection direction, the 10 segmental beams 82 on one side of the starting block 81 are sequentially numbered as 1# segmental beam 82, 2# segmental beam 82 and 3# segmental beam 82 … … 10# segmental beam 82; the 10 segment beams 82 on the other side of the originating block 81 are numbered sequentially as 1 '# segment beam 82, 2' # segment beam 82, 3 '# segment beam 82 … … 10' # segment beam 82. When the bridge girder erection machine is erected, the first crown block 5 and the second crown block 6 respectively lift (the 1# section girder 82 and the 1 '# section girder 82), (the 2# section girder 82 and the 2' # section), (the 3# section girder 82 and the 3 '# section) and … … (the 10# section girder 82 and the 10' # section) for installation.
Optionally, the controlling the bridge girder erection machine to perform the via hole operation includes:
adjusting the bridge girder erection machine to enter a pushing preparation state;
and pushing the main beam 1 of the bridge girder erection machine in multiple sections until the bridge girder erection machine completes the hole passing operation.
Specifically, adjusting the bridge girder erection machine to enter the pushing preparation state comprises:
moving the second leg 3 from the center position of the first starting block 81 toward the third leg 4 by a first preset distance and then fixing;
moving the first crown block 5 to the side of the second leg 3 facing the first leg 2, and moving the second crown block 6 to the side of the first leg 2 facing the second leg 3;
moving the third leg 4 to the end of the cantilever beam 8 remote from the first leg 2 and the second leg 3 to the central position of the first origination block 81;
the first crown block 5 is moved to the third leg 4, and the first leg 2 is moved to the first starting block 81,
the second crown block 6 is moved to the side of the second leg 3 facing the third leg 4,
the second leg 3 is moved onto the section beam 82 beside the third leg 4 and the first crown block 5 is moved beside the second crown block 6.
Therefore, the first support leg 2, the second support leg 3, the third support leg 4, the first crown block 5 and the second crown block 6 of the bridge girder erection machine are deformed for multiple times, and finally the bridge girder erection machine is promoted to enter a pushing preparation state, so that the subsequent bridge girder erection machine is convenient to stabilize during pushing.
Specifically, the girder 1 of bridge girder erection machine is pushed in the multistage top, and the via hole operation includes until the bridge girder erection machine accomplishes:
after the main beam 1 is pushed by a second preset distance, a temporary supporting leg is installed on the main beam 1, so that the temporary supporting leg is supported on the second starting block 81;
moving the third leg 4 to the second starting block 81, detaching the temporary support, and moving the first crown block 5 and the second crown block 6 to the side of the third leg 4;
referring to fig. 4, the main beam 1 is pushed continuously until the first leg 2 is separated from the main beam 1, a temporary leg is installed on the main beam 1, and the first leg 2 is installed on the third starting block 81 or the last pier;
referring to fig. 5, the main beam 1 is pushed continuously, so that the main beam 1 drives the temporary support legs to move until the main beam 1 moves to the first support legs 2 and is fixed, and the positions of the first crown block 5 and the second crown block 6 are adjusted in the pushing process to prevent the main beam 1 from overturning;
and adjusting the bridge girder erection machine to enter an erection preparation state so as to complete the hole passing operation.
It is understood that the main beam 1 and the first, second and third legs 2, 3 and 4 are relatively displaced by the thrusters. After the bridge girder erection machine enters a pushing preparation state, the main girder 1, the first supporting leg 2, the second supporting leg 3 and the third supporting leg 4 alternately generate relative displacement, and the first crown block 5 and the second crown block 6 realize counterweight, and finally, after the bridge girder erection machine enters the erecting preparation state, the hole passing operation of the bridge girder erection machine is completed.
Like this, when the bridging machine carries out the via hole operation, girder 1 and first landing leg 2, second landing leg 3, third landing leg 4, first overhead traveling crane 5 and second overhead traveling crane 6 are in stable state all the time, can not cause the appearance of bridging machine phenomenon of toppling, have avoided the probability of incident to appear.
In one embodiment, adjusting the bridge girder erection machine into the erection ready state comprises:
moving a first crown block 5 and a second crown block 6 to the side of the first support leg 2;
moving the second leg 3 onto the second origination block 81 and removing the temporary leg;
the third leg 4 is moved to the center of the second starting block 81 and pushes the main beam 1 in place and leveled to bring the bridge erecting machine into a ready state for erection.
Like this, after the bridging machine via hole is accomplished, first overhead traveling crane 5 and the second overhead traveling crane 6 of bridging machine can directly handling section roof beam 82 and assemble to carry out assembling of next cantilever beam 8 fast.
Optionally, when the adjacent cantilever beams 8 are closed, the weights are installed at two ends of the adjacent cantilever beams 8, the closing sections are installed at the opposite ends of the adjacent cantilever beams 8 and temporarily locked, and then the two cantilever beams 8 are closed. After two adjacent cantilever beams 8 are closed, removing the ballast weights at the ends, deviating from each other, of the two adjacent cantilever beams 8, constructing a pavement and a rail bearing platform on the bridge floor outside the ballast weight range, removing part of the ballast weights, moving the rest of the ballast weights to the constructed sections of the pavement and the rail bearing platform, and constructing the pavement and the rail bearing platform on the rest of the bridge floor; and finally, removing all the weights after the installation of other accessory facilities is finished.
The reader should understand that in the description of this specification, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example" or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
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 erection method is characterized by comprising the following steps:
s1, erecting prefabricated piers according to bridge information, and installing an initial block on the prefabricated pier between the first prefabricated pier and the last prefabricated pier;
s2, mounting the bridge girder erection machine, so that one leg of the bridge girder erection machine is supported on the first prefabricated bridge pier, and the other two legs of the bridge girder erection machine are respectively supported on the starting blocks beside the first prefabricated bridge pier;
s3, erecting section beams at the two sides of the starting block with the support legs standing in the middle simultaneously through the bridge erecting machine until the assembly of one cantilever beam is completed;
s4, adjusting the bridge girder erection machine to enter a via hole preparation state;
s5, controlling the bridge girder erection machine to carry out hole passing operation;
and S6, repeating the steps S3 to S5 until all the cantilever beams are erected, and closing two adjacent cantilever beams.
2. The bridge erecting method according to claim 1, wherein after the installation of the initial block on the prefabricated bridge pier between the first prefabricated bridge pier and the last prefabricated bridge pier, the method further comprises the following steps:
tensile ties are placed under both sides of the originating block to prevent the originating block from tipping over.
3. The method for erecting a bridge according to claim 1, wherein the bridge girder erection machine comprises a main girder, a first crown block, a second crown block, a first leg, a second leg and a third leg, the first leg, the second leg and the third leg support the main girder along the length direction of the main girder, the first crown block and the second crown block are slidably arranged on the main girder, and the main girder comprises two main girder trusses and a parallel truss connecting the ends of the two main girder trusses; the mounting frame bridge crane comprises:
hoisting the first support leg to a first prefabricated pier for fixing, and hoisting the second support leg and the third support leg to the starting block on a second prefabricated pier for fixing;
hoisting the two main girder trusses to the first support leg, the second support leg and the third support leg for fixing, and hoisting the parallel truss trusses to the ends of the two main girder trusses for fixing;
installing the first crown block and the second crown block on the two main beam trusses;
the first supporting leg, the second supporting leg, the third supporting leg, the main beam, the first crown block and the second crown block are respectively provided with corresponding hydraulic electric equipment and are debugged.
4. The method for erecting a bridge according to claim 1, wherein said erecting section girders simultaneously on both sides of said starting block with said legs standing in the middle by said bridge erecting machine until completing erection of one cantilever beam comprises:
s301, respectively conveying the section beams to two sides of the starting block on which the support legs stand in the middle through a first crown block and a second crown block of the bridge girder erection machine;
s302, splicing two sections of the section beams on two sides of the starting block where the supporting legs stand in the middle;
s303, adjusting the positions of the bridge girder erection machine corresponding to the supporting legs to assemble the segmental girders next time;
and S304, repeating the steps S301 to S303 until the assembly of one cantilever beam is completed.
5. A bridge erection method according to claim 4, wherein during erection of the bridge erection machine, the position of the centre line of the bridge erection machine relative to the centre line of the bridge is adjusted so that the traverse stroke ranges of the first crown block and the second crown block meet a preset stroke range.
6. The bridge erecting method according to claim 1, wherein said adjusting said bridge erecting machine into a via preparation state comprises:
acquiring a maximum deviation value between a central line of a bridge girder erection machine and a central line of the bridge;
and when the maximum deviation value is larger than the preset deviation value, adjusting the position of the central line of the bridge girder erection machine relative to the central line of the bridge.
7. The bridge erecting method according to claim 3, wherein the controlling the bridge erecting machine to perform the via-hole operation comprises:
adjusting the bridge girder erection machine to enter a pushing preparation state;
and pushing the main beam of the bridge girder erection machine in multiple sections until the bridge girder erection machine completes the hole passing operation.
8. A bridge erecting method according to claim 7, wherein said adjusting said bridge erecting machine into a jack-up ready state comprises:
moving the second leg from the center position of the first originating block to the third leg by a first preset distance and then fixing the second leg;
moving the first crown block to a side of the second leg facing the first leg, and moving the second crown block to a side of the first leg facing the second leg;
moving the third leg to the end of the cantilever beam remote from the first leg and the second leg to a central position of a first one of the origination blocks;
moving a first crown block to the third leg and the first leg to a first one of the origination blocks,
moving the second crown block to a side of the second leg toward the third leg,
moving the second leg onto the section beam beside the third leg and moving the first crown block beside the second crown block.
9. The bridge erecting method according to claim 7, wherein the pushing the girder of the bridge erecting machine by the plurality of segments until the bridge erecting machine completes the hole passing operation comprises:
after the main beam is pushed for a second preset distance, a temporary supporting leg is installed on the main beam, so that the temporary supporting leg is supported on a second starting block;
moving the third leg to a second one of the origination blocks, detaching the temporary support, and moving the first crown block and the second crown block to the side of the third leg;
continuously pushing the main beam until the first support leg is separated from the main beam, mounting the temporary support leg on the main beam, and mounting the first support leg on a third initial block or the last pier;
continuously pushing the main beam to enable the main beam to drive the temporary support leg to move until the main beam moves to the first support leg and is fixed, and adjusting the positions of the first crown block and the second crown block to prevent the main beam from overturning in the pushing process;
and adjusting the bridge girder erection machine to enter an erection preparation state so as to finish the hole passing operation.
10. A method for erecting a bridge according to claim 9, wherein said adjusting said bridge erecting machine into a ready-to-erect state comprises:
moving the second crown block of the first crown block to the side of the first leg;
moving said second leg to a second of said origination blocks and removing said temporary leg;
and moving the third support leg to the central position of the second starting block, and pushing the main beam to be in place and leveled so as to promote the bridge girder erection machine to enter a erection preparation state.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210496923.5A CN114875810A (en) | 2022-05-09 | 2022-05-09 | Bridge erecting method |
| PCT/CN2022/095284 WO2023216325A1 (en) | 2022-05-09 | 2022-05-26 | Bridge erecting method |
| ZA2023/10909A ZA202310909B (en) | 2022-05-09 | 2023-11-27 | Girder-erecting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210496923.5A CN114875810A (en) | 2022-05-09 | 2022-05-09 | Bridge erecting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114875810A true CN114875810A (en) | 2022-08-09 |
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ID=82674053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210496923.5A Pending CN114875810A (en) | 2022-05-09 | 2022-05-09 | Bridge erecting method |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN114875810A (en) |
| WO (1) | WO2023216325A1 (en) |
| ZA (1) | ZA202310909B (en) |
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| JPH08144224A (en) * | 1994-11-18 | 1996-06-04 | Kajima Corp | Erection method of bridge |
| CN106758828A (en) * | 2016-12-02 | 2017-05-31 | 腾达建设集团股份有限公司 | The application process of fixed asymmetric bridge girder cantilever assembly equipment |
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| CN109778717A (en) * | 2019-01-18 | 2019-05-21 | 腾达建设集团股份有限公司 | A kind of passive method of adjustment of the mechanical state of cantilever beam |
| CN112962459A (en) * | 2021-02-05 | 2021-06-15 | 武汉通联路桥机械技术有限公司 | Integrated bridge girder erection machine for piling, pier mounting and girder erection and bridge construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6702835B2 (en) * | 2016-09-27 | 2020-06-03 | 三井住友建設株式会社 | Bridge girder erection method for multi span span bridge |
| CN109610346B (en) * | 2018-12-18 | 2020-10-16 | 腾达建设集团股份有限公司 | Cantilever beam adjusting method |
| CN110093865B (en) * | 2019-06-04 | 2021-07-13 | 秦皇岛天业通联重工科技有限公司 | Bridge erecting machine |
-
2022
- 2022-05-09 CN CN202210496923.5A patent/CN114875810A/en active Pending
- 2022-05-26 WO PCT/CN2022/095284 patent/WO2023216325A1/en unknown
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2023
- 2023-11-27 ZA ZA2023/10909A patent/ZA202310909B/en unknown
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| JPH08144224A (en) * | 1994-11-18 | 1996-06-04 | Kajima Corp | Erection method of bridge |
| CN106758828A (en) * | 2016-12-02 | 2017-05-31 | 腾达建设集团股份有限公司 | The application process of fixed asymmetric bridge girder cantilever assembly equipment |
| CN109252452A (en) * | 2018-11-23 | 2019-01-22 | 腾达建设集团股份有限公司 | A kind of Bridge Erector |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2023216325A1 (en) | 2023-11-16 |
| ZA202310909B (en) | 2024-06-26 |
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