CN110093862B - Three-working-face bridge girder erection machine capable of realizing longitudinal and transverse assembly and bent cap non-channel segment assembly construction method - Google Patents
Three-working-face bridge girder erection machine capable of realizing longitudinal and transverse assembly and bent cap non-channel segment assembly construction method Download PDFInfo
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- CN110093862B CN110093862B CN201910469861.7A CN201910469861A CN110093862B CN 110093862 B CN110093862 B CN 110093862B CN 201910469861 A CN201910469861 A CN 201910469861A CN 110093862 B CN110093862 B CN 110093862B
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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
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Abstract
The invention discloses a three-working-face bridge girder erection machine capable of realizing longitudinal and transverse assembly and a bent cap non-channel segment assembly construction method. The invention can realize the vertical erection of the prefabricated pier upright post, the transverse assembly of the prefabricated bent cap section and the longitudinal erection of the prefabricated main girder, and does not need repeated disassembly and assembly facilities such as temporary channels or brackets and the like for the transverse assembly of the bent cap section.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a three-working-face bridge girder erection machine capable of realizing longitudinal and transverse assembly and a bent cap non-channel segment assembly construction method.
Background
The full prefabrication assembly process of land bridges is gradually popularized and applied in China, and the prefabrication bridge pier upright posts, cover beams and main beams are erected in a crawler crane or an automobile crane mainly, and the existing novel integrated bridge girder erection machine is erected. The integrated bridge girder erection machine is applied to the main channel project of the Ningbo Zhoshan harbor for the first time, the bridge girder erection machine takes the erected bridge span as a channel for supporting and transporting prefabricated components, and the bridge span is forwards and gradually assembled along the route direction, so that temporary land sign under the bridge and the influence on the surrounding environment and traffic are reduced, and the automatic and mechanical installation is realized.
At present, the prefabricated bridge pier bent cap adopts whole section prefabrication and erects, and as shown in fig. 1, prefabricated bent cap 7 is transported in place through the equipment of transporting on the bridge, and after the completion of erecting along with pier stand 8, hoist and mount prefabricated bent cap 7 to pier stand 8 through crane 5 on main truss 1, location and lay to accomplish strong such as grout. Likewise, the upper structural girder 6 is erected to the pier cap beam 7 by bridge deck transportation and a bridge girder erection machine hoisting.
As shown in fig. 1, the bridge girder erection machine mainly involves two working surfaces, wherein the first working surface is used for hoisting the prefabricated pier upright post 8 and the capping beam 7, and the second working surface is used for hoisting the upper structure girder 6, so that the bridge girder erection machine can be called as a double-working-surface integrated bridge girder erection machine. In fig. 1: 1-a main truss of a bridge girder erection machine, 2-an auxiliary supporting leg in front of the bridge girder erection machine, 3-a front bearing supporting leg of the bridge girder erection machine, 4-a rear bearing supporting leg of the bridge girder erection machine, 5-a crane of the bridge girder erection machine, 6-a prefabricated girder of an upper structure, 7-a cap beam of a prefabricated pier, 8-a stand column of the prefabricated pier and 9-a pier bearing platform (a bottom tie beam).
For the conditions of bridge width increase (8 lanes and even 10 lanes) or the utilization of space under the bridge, the size of the bridge pier bent cap is larger, the cantilever range is enlarged, the weight of the whole bridge pier bent cap is very large, and if the whole bridge pier bent cap is prefabricated, a plurality of problems are generated by adopting the double-working-surface bridge girder erection machine: on the one hand, when the weights of prefabricated members of the prefabricated main beam, the cover beam and the pier upright post are close to each other and are in a certain range, the effect of the bridge girder erection machine is most remarkable, and if the weight of the prefabricated cover beam is too large, the prefabricated cover beam is difficult to hoist, or the economic benefit is reduced; on the other hand, because the bent cap is a transverse bridge directional component and has larger width, when the bridge girder erection machine is adopted to hoist the bent cap, the bent cap is generally placed along the longitudinal bridge direction, plane rotation is carried out in the air after hoisting, and then the bent cap and the pier upright post are positioned and placed, so that when the size and the weight of the bent cap are large, the difficulty of plane rotation operation is increased, and a certain risk exists; on the other hand, when the weight of the prefabricated cover beam is large, the stress of the girder can be increased in the transportation process of the bridge deck, and the safety of the girder is disadvantageous in the construction process.
As described above, it is necessary to perform segment prefabrication of the bent cap, reduce the size and the hoisting weight of individual members, and erect the bent cap in place by means of transverse splicing, thus requiring the bridge girder erection machine to add a working surface. In addition, when the prefabricated bent cap adopts segment assembly, certain measures are required to be taken to ensure the structural stability and positioning accuracy of the bent cap segments in the assembly process, and the existing double-working-surface integrated bridge girder erection machine is difficult to realize.
Disclosure of Invention
In view of the above, the invention provides a three-working-face bridge girder erection machine capable of realizing longitudinal and transverse assembly and a bent cap non-channel segment assembly method, wherein a prefabricated bent cap segment transverse assembly working face is additionally arranged while the double working faces of a bridge pier upright post and an upper structure girder are erected, and the working face can also realize the non-channel segment assembly of the bent cap, namely, the structural stability and the positioning accuracy of the bent cap segment can be ensured without arranging temporary channels or brackets and the like in the bent cap segment assembly process.
A three-working-face bridge girder erection machine capable of realizing longitudinal and transverse assembly comprises a main truss; the front end of the main truss is supported on a bearing platform of an n+3 span through auxiliary supporting legs, and the span is provided with pier columns on the bearing platform but no capping beam is established; a cross beam is transversely erected at the bottom of the main truss corresponding to the n+3 th cross bearing platform, and is connected with the main truss through a stiffening support rod or a stiffening cable, so that the cross beam becomes a working surface for realizing transverse assembly of the prefabricated bent cap sections, and n is a natural number larger than 0;
the main truss is provided with a movable crane for assisting in transporting and installing prefabricated pier columns, capping beam sections and beam plates.
Further, the rear part of the main truss is supported at the end part of the beam plate between the nth span and the n+1th span through rear bearing legs, the nth span and the n+1th span are respectively provided with an pier column and a capping beam on respective bearing platforms, and the beam plate is erected on the capping beams of the two spans.
Further, the middle part of the main truss is supported on the pier stud capping beam of the n+2th span through a front bearing leg, and the span is not yet erected with the beam plate between the n+3th span.
Further, after the assembly work of the capping beam section is completed on the bearing platform of the n+3th span, the front bearing support leg on the n+2th span pier column capping beam is transferred to the n+3th span pier column capping beam, and the rear bearing support leg is transferred to the end part of the beam slab between the n+1th span and the n+2th span.
Further, the main truss is combined through the movement of the front bearing support leg and the rear bearing support leg to realize a span moving procedure, so that the assembly operation of the whole bridge span is completed.
Further, guide rails are arranged at the tops of two sides of the main truss and used for enabling the crane to longitudinally move on the guide rails.
Further, the crane comprises a longitudinal running mechanism, a transverse running mechanism and a crane, wherein the crane is arranged on the transverse running mechanism and used for hoisting the prefabricated pier column, the capping beam section and the beam plate, the transverse running mechanism is used for transversely moving on the longitudinal running mechanism, and the longitudinal running mechanism is used for longitudinally moving on the guide rail.
The bent cap non-channel segment assembling construction method adopting the three-working-face bridge girder erection machine comprises the following steps:
(1) After the erection of the pier column of the n+3th span is completed, transporting the prefabricated capping beam section N through the bridge deck 1 And lifting and longitudinally bringing the segment N by means of a crane 1 Conveying to a beam; the prefabricated capping beam is segmented according to design optimization so that it is composed of a plurality of segments N 1 、N 2 、....、N i 、N i+1 Assembling;
(2) Using mechanical switching means to connect the segments N 1 Transferred to the beam, the segment N is moved by a track on the beam 1 Transversely moving to a preset position, and the crane retreats and lifts the next section N 2 ；
(3) Waiting segment N 1 After accurate positioning, it is placed on the top of one of the n+3 th cross pierFacing and grouting to make the segment N 1 Is combined with the pier column; similarly, segment N 2 Hoisting in place, placing it on top of another pier column, grouting to make segment N 2 To be combined with pier column to prepare segment N 3 Is used for transferring and transversely moving to position;
(4) Waiting segment N 1 And N 2 After consolidation with the respective pier stud, the section N between the pier studs is placed 3 And then to segment N 3 And N 1 N 3 And N 2 Gluing the splicing seams; in this process, the following capping beam segment N is synchronized 4 And N 5 Hoisting in place;
(5) Section N of the capping beam 4 And N 5 Synchronously lowering after accurate positioning, gluing at the joint of the sections, and then tensioning and pre-stressing for fixing;
(6) Hoisting the rest sections of the bent cap cantilever in place, installing symmetrical sections by adopting a balanced construction method, and performing gluing and tensioning prestress on the splicing seams;
(7) And after the two symmetrical segments are accurately positioned, synchronously lowering and splicing the two symmetrical segments with the adjacent segments, gluing the splicing seams, and tensioning the final prestress to finish the final construction of the bent cap.
As another technical scheme, the bent cap non-channel segment assembling method of the three-working-face bridge girder erection machine adopts a full-glue splicing method for assembling, uses slings as temporary supports, and finally stretches all the bent cap prestressing force once, and specifically comprises the following steps:
(1) After the erection of the pier column of the n+3th span is completed, transporting the prefabricated capping beam section N through the bridge deck 1 And lifting and longitudinally bringing the segment N by means of a crane 1 Conveying to a beam; the prefabricated capping beam is segmented according to design optimization so that it is composed of a plurality of segments N i 、N i-1 、....、N 1 、M 1 、M 2 、....、M i Assembling;
(2) Using mechanical switching means to connect the segments N 1 Transferred to the beam, the segment N is moved by a track on the beam 1 Is moved laterally to a predetermined position and,the crane retreats and lifts the next section N 2 ；
(3) Waiting segment N 1 After accurate positioning, it is placed to the n+3 th cross-pier top surface and grouting is performed to make segment N 1 Is combined with the pier column;
(4) Waiting segment N 1 After the pier column is solidified, the section N of the cantilever side of the capping beam is 2 、N 3 ……N i Sequentially hoisting in place, sequentially lowering the segments to perform gluing and splicing with the previous segment, and connecting each segment with the cross beam through a sling as a temporary support at the moment;
(5) Segment M on the other side 1 And M 2 Sequentially hoisting in place, and sequentially lowering to carry out gluing and splicing with the previous segment; segment M 2 Another pier top segment which is the n+3th span, thus being the mounting segment M 2 When not only needs to be connected with the segment M 1 Accurate splicing, accurate butt joint with reserved steel bars at the pier top is also required, grouting is carried out for equal strength after butt joint, and the next section M is prepared 3 Is spliced by the steps of (1);
(6) Sequentially joining subsequent segments M 3 、....、M i Hoisting in place, sequentially lowering the segments to perform gluing and splicing with the previous segment, and simultaneously ensuring that each segment still uses a sling as a temporary support;
(7) After all the bent cap sections are hoisted in place, tensioning all the bent cap prestressing force at one time, and after the tensioning procedure is completed, eliminating slings of all the sections to complete the installation of the bent cap.
The invention improves the existing double-working-face integrated bridge girder erection machine, adds a third working face, namely a prefabricated bent cap section transverse assembling working face, realizes the section prefabrication and assembly of the bent cap, and provides a construction method for the bent cap non-channel section assembly by using the three-working-face bridge girder erection machine, thereby realizing the simplicity, rapidness, automation and mechanization of prefabrication and assembly of large-cantilever bent cap sections. Compared with the prior art, the invention has the following beneficial technical effects:
(1) The capping beam sections are prefabricated, so that the hoisting weight is reduced, aerial plane rotation operation is not needed, and the risk is reduced.
(2) The transverse movement of the bent cap section on the third working surface and the lifting and longitudinal transportation of the subsequent section can realize synchronous operation, and the efficiency is high.
(3) The segment assembly of the bent cap does not need to be provided with facilities such as temporary channels or brackets on the pier upright posts, and the erection process has the advantages of automation and mechanization.
(4) The three-working-face bridge girder erection machine can be suitable for different types of bent cap segment assembling processes, and has strong adaptability and high benefit.
Drawings
FIG. 1 is a schematic construction diagram of a conventional double-working-face integrated bridge girder erection machine.
Fig. 2 is a schematic structural view of a three-working-face bridge girder erection machine capable of realizing longitudinal and transverse assembly.
Fig. 3 is a schematic structural view of a transverse assembly working surface of a precast bent cap segment according to the present invention.
Fig. 4 is a schematic diagram of cable replacement working conditions of a transverse assembly working face of a prefabricated bent cap segment.
Fig. 5 (a) to 5 (g) are schematic flow diagrams of a bent cap segment assembling method of the three-working-face bridge girder erection machine.
Fig. 6 (a) to 6 (f) are schematic flow diagrams of another assembling method of a bent cap segment of the three-working-face bridge girder erection machine of the invention.
Fig. 2 to 3: 1-main truss, 2-auxiliary leg, 3-front bearing leg, 4-rear bearing leg, 5-crane, 5 (a) -transverse moving crane, 5 (b) -longitudinal travelling mechanism, 6-erected beam plate, 7-bent cap, 7 (a) -7 (c) -prefabricated bent cap section, 8-pier column, 9-pier cap (bottom tie beam), 10-prefabricated bent cap section transverse assembling working face, 10 (a) -cross beam, 10 (b) -stiffening support bar or stiffening cable.
Detailed Description
In order to more particularly describe the present invention, the following detailed description of the technical scheme of the present invention is provided with reference to the accompanying drawings and the specific embodiments.
The three-working-surface bridge girder erection machine capable of realizing longitudinal and transverse assembly is shown in fig. 2, wherein the transverse assembly working surface 10 of the prefabricated bent cap sections is mainly realized by a transverse erection beam, and the transverse erection beam comprises a beam 10 (a) and a stiffening support rod or a stiffening cable 10 (b) as shown in fig. 3.
The prefabricated bent cap 7 is segmented according to design optimization, during construction, all sections (N1, N2, … … and Ni) of the bent cap are sequentially lifted to the transverse assembling working face 10 of the prefabricated bent cap section, the bent cap section is transferred to the cross beam 10 (a) in a mechanical switching mode, the bent cap section accurately reaches a preset position through transverse movement on the cross beam 10 (a), and temporary channels or brackets and the like are not required to be arranged on the pier column 8 in the positioning and placing process.
The above-mentioned "mechanical conversion mode" may be implemented by using a simpler cable replacement mode, as shown in fig. 4, after the bridge girder erection crane 5 conveys the component N1 in place, the "transverse erection beam" is anchored to the component N1 by the preparation slings, and the slings are gradually suspended, and after the total weight of the component N1 is converted to the beam 10 (a), the slings of the bridge girder erection crane 5 are released to complete the conversion. Of course, the "mechanical conversion means" is not limited to this method of changing the cable.
Example 1:
the following describes a bent cap non-channel segment assembling construction method by using the three-working-face bridge girder erection machine by using a case, and the concrete steps are as follows:
step 1: after the erection of the prefabricated pier column 8 is completed, as shown in fig. 5 (a), the prefabricated coping section N1 is transported through the bridge deck, and lifted by the bridge girder erection machine crane 5 and transported longitudinally to the transverse assembling working face of the prefabricated coping section.
Step 2: as shown in fig. 5 (b), the capping beam segment N1 is transferred to the cross beam 10 (a) by a mechanical transfer device for transversely erecting the cross beam, the segment N1 is transversely moved to a predetermined position by a rail of the cross beam 10 (a), and the bridge girder erection machine crown block 5 retreats and lifts the next segment N2, so that the above processes can be synchronously performed, and the erection efficiency is improved.
Step 3: as shown in fig. 5 (c), after the segment N1 is precisely positioned, it is placed on the top surface of the pier column, grouting is performed to combine the segment N1 with the pier column, step 2 is repeated, the capping beam segment N2 on the top of the other pier column is hoisted in place, and the capping beam segment N3 is prepared for transfer and lateral movement positioning.
Step 4: as shown in fig. 5 (d), after grouting and the like are performed on the capping beam sections at the tops of the upright posts, the capping beam sections N3 between the upright posts are placed, and the splicing seams of the sections N3, N1 and N2 are required to be glued; according to the difference of prefabrication and erection precision, a wet joint of about 10cm can be arranged at the position with the minimum bending moment of the bridge cover beam so as to adapt to construction errors; in the process, the steps 1-2 are repeated, and the subsequent bent cap sections N4 and N5 are hoisted in place.
Step 5: as shown in fig. 5 (e), similar to the girder cantilever assembling construction, after the capping beam segments N4 and N5 are positioned accurately, the capping beam segments are synchronously lowered, gluing is performed at the segment joint, and then tensioning prestressing force is performed for fixing.
Step 6: and (2) repeating the steps 1, 2 and 5, hoisting the rest sections of the cantilever of the bent cap in place, installing symmetrical sections by adopting a balanced construction method, and performing gluing and tensioning prestress on the joint.
Step 7: as shown in fig. 5 (g), after the two symmetrical segments are precisely positioned, the two symmetrical segments are synchronously lowered and spliced with the adjacent segments, the splice joint is glued, and the final prestress is tensioned, so that the final construction of the bent cap is completed.
Example 2:
the three-working-face bridge girder erection machine can adapt to different types of bent cap segment assembling processes, as shown in fig. 6 (a) to 6 (f), the method is different from the balanced cantilever type transverse assembling method, adopts a full-glue splicing method for assembling, uses slings as temporary supports, and finally stretches all the bent cap segments for prestressing at one time, and has higher requirements on segment prefabrication and construction precision, and the method comprises the following specific steps:
step 1: after the erection of the prefabricated pier column 8 is completed, as shown in fig. 6 (a), the prefabricated coping section N1 is transported through the bridge deck, and lifted by the bridge girder erection machine crane 5 and transported longitudinally to the transverse assembling working face of the prefabricated coping section.
Step 2: as shown in fig. 6 (b), the capping beam segment N1 is transferred to the cross beam 10 (a) by a mechanical transfer device for transversely erecting the cross beam, the segment N1 is transversely moved to a predetermined position by the rails of the cross beam 10 (a), and the bridge girder erection machine crown block 5 retreats and lifts the next segment N2, which can be synchronously performed, thereby improving the erection efficiency.
Step 3: as shown in fig. 6 (c), after the segment N1 is precisely positioned, it is placed on the top surface of the pier column, grouting is performed to combine the segment N1 with the pier column, step 2 is repeated, the segments N2 and N3 … … Ni on the cantilever side of the capping beam are sequentially hoisted in place, and sequentially lowered to be glued and spliced with the previous segment, and at this time, the sling is still used as a temporary support.
Step 4: as shown in fig. 6 (d), repeating the step 2, hoisting the segments M1 and M2 on the other side of the segment N1 in place in sequence, and sequentially lowering the segments to perform gluing and splicing with the previous segment; in this case, the M2 segment is another pier top segment, so when the M2 segment is installed, not only the M1 segment needs to be accurately spliced, but also the reserved steel bar of the pier top needs to be accurately butted, grouting is performed for equal strength after the butting, and splicing of the next segment M3 is prepared.
Step 5: as shown in fig. 6 (e), step 2 is repeated, and the subsequent segments M3 and … … Mi are sequentially hoisted in place and sequentially lowered to perform gluing and splicing with the previous segment.
Step 6: as shown in fig. 6 (f), after all the bent cap sections are hoisted in place, all the bent cap is tensioned at one time to be prestressed, and after the tensioning process is completed, slings of all the sections can be omitted, so that the installation of the bent cap is completed.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those having ordinary skill in the art that various modifications to the above-described embodiments may be readily made and the generic principles described herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications within the scope of the present invention.
Claims (3)
1. A three-working-face bridge girder erection machine capable of realizing longitudinal and transverse assembly comprises a main truss; the method is characterized in that: the front end of the main truss is supported on a bearing platform of an n+3 span through auxiliary supporting legs, and the span is provided with pier columns on the bearing platform but no capping beam is established; a cross beam is transversely erected at the bottom of the main truss corresponding to the n+3 th cross bearing platform, and is connected with the main truss through a stiffening support rod or a stiffening cable, so that the cross beam becomes a working surface for realizing transverse assembly of the prefabricated bent cap sections, and n is a natural number larger than 0; the main truss is provided with a movable crane for assisting in transporting and installing prefabricated pier columns, capping beam sections and beam plates;
the rear part of the main truss is supported at the end part of the beam plate between the nth span and the n+1th span through rear bearing legs, the nth span and the n+1th span are respectively provided with pier columns and cover beams on respective bearing platforms, and the beam plates are supported on the cover beams of the two spans; the middle part of the main truss is supported on a pier stud capping beam of an n+2th span through a front bearing supporting leg, and a beam plate is not erected between the n+3th span and the span;
after the assembly work of the capping beam section is completed on the bearing platform of the n+3th span, transferring the front bearing support leg on the n+2th span pier stud capping beam to the n+3th span pier stud capping beam, and simultaneously transferring the rear bearing support leg to the end part of the beam slab between the n+1th span and the n+2th span;
the main truss realizes a span moving process through the moving combination of the front bearing support leg and the rear bearing support leg, so that the assembly operation of the whole bridge span is completed; the tops of two sides of the main truss are provided with guide rails for the crane to longitudinally move on; the crane comprises a longitudinal travelling mechanism, a transverse travelling mechanism and a crane, wherein the crane is arranged on the transverse travelling mechanism and used for hoisting the prefabricated pier column, the capping beam section and the beam plate, the transverse travelling mechanism is used for transversely moving on the longitudinal travelling mechanism, and the longitudinal travelling mechanism is used for longitudinally moving on the guide rail.
2. A bent cap non-channel segment assembling construction method adopting the three-working-face bridge girder erection machine according to claim 1, comprising the following steps:
(1) After the erection of the pier column of the n+3th span is completed, transporting the prefabricated capping beam section N through the bridge deck 1 And lifting and longitudinally bringing the segment N by means of a crane 1 Conveying to a beam; the prefabricated capping beam is segmented according to design optimization so that it is composed of a plurality of segments N 1 、N 2 、....、N i 、N i+1 Assembling;
(2) By means of machinesThe switching device connects the segment N 1 Transferred to the beam, the segment N is moved by a track on the beam 1 Transversely moving to a preset position, and the crane retreats and lifts the next section N 2 ；
(3) Waiting segment N 1 After accurate positioning, it is placed to the n+3 th cross-pier top surface and grouting is performed to make segment N 1 Is combined with the pier column; similarly, segment N 2 Hoisting in place, placing it on top of another pier column, grouting to make segment N 2 To be combined with pier column to prepare segment N 3 Is used for transferring and transversely moving to position;
(4) Waiting segment N 1 And N 2 After consolidation with the respective pier stud, the section N between the pier studs is placed 3 And then to segment N 3 And N 1 N 3 And N 2 Gluing the splicing seams; in this process, the following capping beam segment N is synchronized 4 And N 5 Hoisting in place;
(5) Section N of the capping beam 4 And N 5 Synchronously lowering after accurate positioning, gluing at the joint of the sections, and then tensioning and pre-stressing for fixing;
(6) Hoisting the rest sections of the bent cap cantilever in place, installing symmetrical sections by adopting a balanced construction method, and performing gluing and tensioning prestress on the splicing seams;
(7) And after the two symmetrical segments are accurately positioned, synchronously lowering and splicing the two symmetrical segments with the adjacent segments, gluing the splicing seams, and tensioning the final prestress to finish the final construction of the bent cap.
3. A bent cap non-channel segment assembling construction method adopting the three-working-face bridge girder erection machine according to claim 1, comprising the following steps:
(1) After the erection of the pier column of the n+3th span is completed, transporting the prefabricated capping beam section N through the bridge deck 1 And lifting and longitudinally bringing the segment N by means of a crane 1 Conveying to a beam; the prefabricated capping beam is segmented according to design optimization so that it is composed of a plurality of segments N i 、N i-1 、....、N 1 、M 1 、M 2 、....、M i Assembling;
(2) Using mechanical switching means to connect the segments N 1 Transferred to the beam, the segment N is moved by a track on the beam 1 Transversely moving to a preset position, and the crane retreats and lifts the next section N 2 ；
(3) Waiting segment N 1 After accurate positioning, it is placed to the n+3 th cross-pier top surface and grouting is performed to make segment N 1 Is combined with the pier column;
(4) Waiting segment N 1 After the pier column is solidified, the section N of the cantilever side of the capping beam is 2 、N 3 ……N i Sequentially hoisting in place, sequentially lowering the segments to perform gluing and splicing with the previous segment, and connecting each segment with the cross beam through a sling as a temporary support at the moment;
(5) Segment M on the other side 1 And M 2 Sequentially hoisting in place, and sequentially lowering to carry out gluing and splicing with the previous segment; segment M 2 Another pier top segment which is the n+3th span, thus being the mounting segment M 2 When not only needs to be connected with the segment M 1 Accurate splicing, accurate butt joint with reserved steel bars at the pier top is also required, grouting is carried out for equal strength after butt joint, and the next section M is prepared 3 Is spliced by the steps of (1);
(6) Sequentially joining subsequent segments M 3 、....、M i Hoisting in place, sequentially lowering the segments to perform gluing and splicing with the previous segment, and simultaneously ensuring that each segment still uses a sling as a temporary support;
(7) After all the bent cap sections are hoisted in place, tensioning all the bent cap prestressing force at one time, and after the tensioning procedure is completed, eliminating slings of all the sections to complete the installation of the bent cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910469861.7A CN110093862B (en) | 2019-05-31 | 2019-05-31 | Three-working-face bridge girder erection machine capable of realizing longitudinal and transverse assembly and bent cap non-channel segment assembly construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910469861.7A CN110093862B (en) | 2019-05-31 | 2019-05-31 | Three-working-face bridge girder erection machine capable of realizing longitudinal and transverse assembly and bent cap non-channel segment assembly construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110093862A CN110093862A (en) | 2019-08-06 |
| CN110093862B true CN110093862B (en) | 2024-04-05 |
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| CN111254837B (en) * | 2020-03-04 | 2021-06-22 | 成都天府轨谷科技有限公司 | Construction method for building bridge by bridge crane fishing method |
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