CN210315235U - Three-working-face bridge girder erection machine capable of realizing longitudinal and transverse assembly - Google Patents
Three-working-face bridge girder erection machine capable of realizing longitudinal and transverse assembly Download PDFInfo
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- CN210315235U CN210315235U CN201920813214.9U CN201920813214U CN210315235U CN 210315235 U CN210315235 U CN 210315235U CN 201920813214 U CN201920813214 U CN 201920813214U CN 210315235 U CN210315235 U CN 210315235U
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Abstract
The utility model discloses a can realize indulging three working face bridging machines and bent cap non-access section of saying that transversely assemble and assemble worker's method, when the two working faces that realize pier stand and superstructure girder erect, newly increased a prefabricated bent cap section and transversely assembled the working face, this working face does the non-access section of saying that realizes the bent cap and assembles, the bent cap section is assembled the in-process promptly and need not to set up the structural stability and the location accuracy nature that can guarantee the bent cap section such as temporary access or bracket. The utility model discloses can realize vertical the erectting of prefabricated pier stand, transversely assemble and vertically erect of prefabricated girder of prefabricated bent cap festival section, to transversely assembling of bent cap festival section, need not interim pavement or bracket etc. and relapse dismouting facility.
Description
Technical Field
The utility model belongs to the technical field of bridge engineering, concretely relates to can realize indulging three working face bridging machines and bent cap no way festival section assembly worker's method of transversely assembling.
Background
The fully-prefabricated assembly process of land bridges is gradually popularized and applied in China, and the erection modes of prefabricated pier columns, capping beams and main beams mainly comprise crawler cranes or truck cranes and the erection of the existing novel integrated bridge girder erection machines. The integrated bridge girder erection machine is applied to the main channel project of the Ningbo Zhoushan harbor for the first time, the erected bridge span is taken as a channel for supporting and transporting prefabricated parts, the bridge girder erection machine advances along the route direction and gradually assembles the rest bridge span, the temporary land acquisition 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 pier capping beam is prefabricated and erected in a whole section, as shown in figure 1, the prefabricated capping beam 7 is transported in place through on-bridge conveying equipment, and after erection of the pier upright post 8 is completed, the prefabricated capping beam 7 is hoisted to the pier upright post 8 through a crane 5 on a main truss 1, is positioned and laid, and is grouted to be strong. Likewise, the superstructure main girders 6 are hoisted and erected to the pier caps 7 by the deck transportation and the bridge girder erection machine.
As shown in fig. 1, the bridge girder erection machine mainly relates to two working surfaces, wherein the first working surface is used for hoisting the prefabricated pier column 8 and the capping beam 7, and the second working surface is used for hoisting the superstructure 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: the method comprises the following steps of 1-main truss of a bridge girder erection machine, 2-front auxiliary supporting leg of the bridge girder erection machine, 3-front bearing supporting leg of the bridge girder erection machine, 4-rear bearing supporting leg of the bridge girder erection machine, 5-crane of the bridge girder erection machine, 6-prefabricated main beam of an upper structure, 7-prefabricated pier capping beam, 8-prefabricated pier stand column and 9-pier bearing platform (bottom tie beam).
To the circumstances such as bridge width increase (8 lanes even 10 lanes) or have space utilization under the bridge, the pier bent cap size is great, the cantilever scope increases, and the weight of whole pier bent cap is very big this moment, if adopt whole section prefabrication, adopt above-mentioned double-working-face bridge girder erection machine will produce a great deal of problems: on one hand, when the weight of the prefabricated components of the prefabricated main beam, the capping beam and the pier upright column is close to and within a certain range, the effect of the bridge girder erection machine is most remarkable, and if the weight of the prefabricated capping beam is too large, the prefabricated capping beam is difficult to hoist, or the economic benefit is reduced; on the other hand, as the capping beam is a transverse bridge-direction component and has larger width, when the capping beam is hoisted by adopting the bridge girder erection machine, the capping beam is generally placed along a longitudinal bridge direction, is hoisted and then is subjected to plane rotation in the air, and is positioned and placed with the pier upright post, so that when the capping beam has large size and weight, the difficulty of plane rotation operation is increased, and certain risk exists; on the other hand, when the weight of the prefabricated capping beam is large, the stress of the main beam can be increased in the transportation process of the bridge deck, and the safety of the main beam in the construction process is unfavorable.
As described above, it is necessary to perform segmental prefabrication of the capping beam, reduce the size and hoisting weight of the individual components, and erect the capping beam in place by means of transverse erection, thus requiring an additional working surface for the bridge erecting machine. In addition, when the prefabricated capping beam is assembled by sections, certain measures need to be taken to ensure the structural stability and the positioning accuracy of the capping beam sections in the assembling 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 utility model provides a can realize indulging three working face bridging machine and bent cap non-access way segment construction method of assembling of transversely assembling, when the two working faces that realize pier stand and superstructure girder erect, newly increased a prefabricated bent cap segment and transversely assembled the working face, this working face does not need to set up the non-access way segment of bent cap and assembles, and the bent cap segment is assembled the in-process promptly and need not to set up the structural stability and the location accuracy nature that can guarantee the bent cap segment such as temporary access way or bracket.
A bridge girder erection machine with three working faces and capable of realizing longitudinal and transverse splicing comprises a main truss; the front end of the main truss is supported on a bearing platform of the (n + 3) th span through an auxiliary supporting leg, and a pier column is installed on the bearing platform of the span without establishing a cover beam; a crossbeam is transversely erected at the position, corresponding to the n +3 th span bearing platform, of the bottom of the main truss, and is connected with the main truss through a stiffening support rod or a stiffening cable so as to enable the crossbeam to become a working surface for realizing transverse assembly of the prefabricated cover beam segments, wherein n is a natural number greater than 0;
the main truss is provided with a movable crane for assisting in transporting and installing the prefabricated pier stud, the capping beam segment and the beam slab.
Furthermore, the rear part of the main truss is supported at the end part of the beam slab between the nth span and the (n + 1) th span through a rear bearing leg, the nth span and the (n + 1) th span are provided with piers and capping beams on respective bearing platforms, and the beam slab is erected on the capping beams of the two spans.
Furthermore, the middle part of the main truss is supported on the pier stud capping beam of the (n + 2) th span through the front bearing support leg, and a beam plate is not erected between the span and the (n + 3) th span.
Further, after the assembling work of the capping beam sections is completed on the bearing platform of the (n + 3) th span, the front bearing leg on the capping beam of the (n + 2) th span pier column is transferred to the capping beam of the (n + 3) th span pier column, and the rear bearing leg is transferred to the end part of the beam plate between the (n + 1) th span and the (n + 2) th span.
Furthermore, the main truss realizes a span moving process through the moving combination of the front bearing supporting leg and the rear bearing supporting leg, so that the assembling operation of the whole bridge span is completed.
Furthermore, guide rails are arranged at the tops of two sides of the main truss and used for enabling the crane to move longitudinally on the guide rails.
Furthermore, 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 stud, the bent cap segment and the beam slab, 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.
The construction method for splicing the sections without access roads of the bent cap of the bridge girder erection machine with the three working faces comprises the following steps:
(1) after the erection of the pier column with the N +3 th span is finished, the prefabricated cover beam segment N is transported through the bridge floor1And hoisting and longitudinally fixing the segment N by a crane1Conveying to a cross beam; the prefabricated capping beam is segmented according to design optimization such that it is made up of a plurality of segments N1、N2、....、Ni、Ni+1Assembled;
(2) segment N with mechanical adapter1Transferred to a beam byTrack on beam to segment N1Is moved transversely to a predetermined position and the crane is retracted and lifts the next segment N2；
(3) Segment to be segmented N1After accurate positioning, the column is placed to the N +3 th span of the top surface of one of the pier studs and grouting is carried out to ensure that the segment N1Combining with the pier stud; likewise, segment N2Hoisting in place, placing the pier column on the top surface of another pier column and grouting to ensure that the segment N is2Combined with the pier stud to prepare segment N3Switching and transverse moving positioning;
(4) segment to be segmented N1And N2After being concreted with the respective pier stud, the segment N between the pier studs is arranged3And then to segment N3And N1And N3And N2Gluing the splicing seams between the two plates; in the process, the subsequent capping beam segment N is synchronously connected4And N5Hoisting in place;
(5) section N of the beam to be covered4And N5After the positioning is accurate, the steel pipe is synchronously placed, glue is coated at the joint seams of the sections, and then the steel pipe is fixed by stretching prestress;
(6) hoisting the rest sections of the bent cap cantilever in place, installing symmetrical sections by adopting a balanced construction method, and gluing and tensioning prestress at the spliced seam;
(7) and after the last two symmetrical sections are accurately positioned, synchronously lowering and splicing the two sections with the adjacent sections, gluing the spliced seam, and tensioning the final prestress to finish the final construction of the cover beam.
As another technical scheme, the construction method for splicing the sections without access ways of the bent caps of the three-working-surface bridge girder erection machine adopts a full-rubber splicing method, uses the sling as a temporary support, and finally tensions the prestress of the whole bent caps at one time, and specifically comprises the following steps:
(1) after the erection of the pier column with the N +3 th span is finished, the prefabricated cover beam segment N is transported through the bridge floor1And hoisting and longitudinally fixing the segment N by a crane1Conveying to a cross beam; the prefabricated capping beam is segmented according to design optimization such that it is made up of a plurality of segments Ni、Ni-1、....、N1、M1、M2、....、MiAssembled;
(2) segment N with mechanical adapter1Transferring to a beam, and transferring the segment N through a track on the beam1Is moved transversely to a predetermined position and the crane is retracted and lifts the next segment N2；
(3) Segment to be segmented N1After accurate positioning, the column is placed to the N +3 th span of the top surface of one of the pier studs and grouting is carried out to ensure that the segment N1Combining with the pier stud;
(4) segment to be segmented N1After being fixedly connected with the pier stud, the segment N on the cantilever side of the bent cap2、N3……NiSequentially hoisting in place, sequentially lowering and gluing and splicing the previous segment, and connecting each segment with the cross beam by using a sling as a temporary support;
(5) segment M of the other side1And M2Hoisting in place in sequence, and putting down in sequence to glue and splice the previous segment; segment M2Another pier top segment spanning n +3, thus at the installation segment M2At the time, not only the segment M is required1Accurate splicing, accurate butt joint with reserved steel bars on the pier top, grouting after butt joint, and preparing the next section M3Splicing;
(6) sequentially connecting the subsequent segments M3、....、MiHoisting in place, sequentially lowering the sections to be glued and spliced with the previous section, and simultaneously ensuring that each section still takes the sling as a temporary support;
(7) after all the sections of the bent cap are hoisted in place, all the prestressed bent cap are stretched in one step, and after the stretching process is completed, slings of all the sections are cancelled, so that the installation of the bent cap is completed.
The utility model discloses an improvement to current two working face integration bridging machine, added the third working face-the working face is transversely assembled to prefabricated bent cap segment, realized that the segment section of bent cap is prefabricated and is assembled to give and used this three working face bridging machine to carry out the construction method that the bent cap has no way segment to assemble, realized that the prefabricated simple quick, automation and the mechanization of assembling of big size, big cantilever bent cap segment. Compared with the prior art, the utility model discloses following beneficial technological effect has:
(1) the bent cap segment is prefabricated, the hoisting weight is reduced, aerial plane rotation operation is not needed, and risks are reduced.
(2) The transverse movement of the capping beam segment on the third working surface, the lifting and the longitudinal transportation of the subsequent segments can realize synchronous operation, and the efficiency is high.
(3) The segment assembly of the bent cap does not need to arrange facilities such as temporary walkways or brackets on the pier upright posts, and the erection process has the advantages of automation and mechanization.
(4) The utility model discloses three working face bridge erectors can adapt to the bent cap segment section assembly process of different grade type, strong adaptability, benefit height.
Drawings
Fig. 1 is a structure of an existing double-working-face integrated bridge girder erection machine and a construction schematic diagram thereof.
Fig. 2 is the utility model discloses can realize the three working faces bridging machine structural schematic that indulge transversely assemble.
Fig. 3 is the structure schematic diagram of the working face is transversely assembled to the precast bent cap segment.
Fig. 4 is the schematic view of the working face of the prefabricated bent cap section for replacing the cable.
Fig. 5(a) -5 (g) are schematic diagrams of a capping beam segment assembling construction method of the three-working-face bridge girder erection machine of the present invention in sequence.
Fig. 6(a) -6 (f) are schematic diagrams of another capping beam segment assembling construction method of the three-working-face bridge girder erection machine of the present invention in sequence.
In fig. 2 to 3: 1-main truss, 2-auxiliary supporting leg, 3-front supporting leg, 4-rear supporting leg, 5-crane, 5(a) -transverse moving crane, 5(b) -longitudinal running mechanism, 6-erected beam slab, 7-capping beam, 7(a) -7 (c) -prefabricated capping beam segment, 8-pier column, 9-pier bearing platform (bottom tie beam), 10-prefabricated capping beam segment transverse assembling working face, 10(a) -cross beam, 10(b) -stiffening support rod or stiffening cable.
Detailed Description
To describe the present invention more specifically, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and the detailed description.
The utility model discloses can realize indulging three working face bridging machines of transversely assembling as shown in fig. 2, wherein, prefabricated bent cap festival section transversely assembles working face 10 and mainly realizes through "transversely erectting the crossbeam", as shown in fig. 3, transversely erects the crossbeam and includes crossbeam 10(a) and stiffening support pole or stiffening cable 10 (b).
The precast capping beam 7 is segmented according to design optimization, during construction, all sections (N1, N2, … … and Ni) of the capping beam are sequentially hoisted to the transverse assembling working face 10 of the precast capping beam sections, the capping beam sections are transferred to the cross beam 10(a) in a mechanical switching mode, and the pre-determined positions are accurately reached through transverse movement on the cross beam 10(a), and temporary sidewalks or brackets and the like do not need to be arranged on the pier stud 8 in the positioning and placing processes.
The mechanical conversion mode can be realized by a simpler cable conversion mode, as shown in fig. 4, when the bridge girder erection crane 5 conveys the component N1 to a position, the spare suspension cables on the transverse erection cross beam are anchored on the component N1 and gradually suspended, and after the total weight of the component N1 is converted onto the cross beam 10(a), the suspension cables of the bridge girder erection crane 5 are released, so that the conversion is completed. Of course, "mechanical conversion" is not limited to this method of changing cables.
Example 1:
the construction method for assembling the sections without access roads of the bent cap by applying the three-working-surface bridge girder erection machine is described by one case, and comprises the following specific steps:
step 1: after the erection of the prefabricated pier stud 8 is completed, the prefabricated capping beam segment N1 is transported through the bridge floor, and is lifted by the bridge girder erection crane 5 and longitudinally transported to the transverse splicing work surface of the prefabricated capping beam segment, as shown in fig. 5 (a).
Step 2: as shown in fig. 5(b), the mechanical switching device for transversely erecting the beam is used for transferring the capping beam segment N1 to the beam 10(a), the segment N1 is transversely moved to a preset position through the rail of the beam 10(a), and the bridge girder erection crane overhead crane 5 retreats and lifts the next segment N2, so that the processes can be synchronously performed, and the erection efficiency is improved.
And step 3: after the segment N1 is precisely positioned, it is placed on the top surface of the pier stud and grouted to combine the segment N1 with the pier stud, as shown in fig. 5(c), the step 2 is repeated to hoist the capping segment N2 of another pier stud top in place and prepare for the transfer and lateral movement positioning of the capping segment N3.
And 4, step 4: as shown in fig. 5(d), after the capping beam segment at the top of the pier of the upright column is grouted with equal strength, the capping beam segment N3 between the upright columns is placed, and the splice joints of the segments N3, N1 and N2 need to be glued; according to different prefabrication and erection accuracy, a wet joint of about 10cm can be arranged at the position with the minimum bending moment of the finished bridge bent cap beam 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.
And 5: as shown in fig. 5(e), similar to the cantilever assembling construction of the main beam, the sections N4 and N5 of the capping beam are positioned accurately and then are synchronously lowered, glue is applied to the joint seams of the sections, and then the sections are fixed by tensioning prestress.
Step 6: and (f) as shown in fig. 5, repeating the steps 1, 2 and 5, 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.
And 7: as shown in fig. 5(g), after the two symmetrical sections are accurately positioned, the two symmetrical sections are synchronously placed and spliced with the adjacent sections, glue is applied to the spliced joints, and final prestress is tensioned, so that the final construction of the cover beam is completed.
Example 2:
the utility model discloses three working face bridge erectors can adapt to the bent cap segment assembly process of different grade type, as shown in fig. 6(a) -6 (f), this embodiment is different with the horizontal assembly worker's method of aforementioned balanced cantilever type, and this kind of worker's method adopts the full glue to assemble to the hoist cable is as interim support, and the whole bent cap prestressing force of final stretch-draw, this worker's method is prefabricated to the segment and construction accuracy requires highly, and concrete step is as follows:
step 1: after the erection of the prefabricated pier stud 8 is completed, the prefabricated capping beam segment N1 is transported through the bridge floor, and is hoisted and longitudinally transported to the transverse splicing work surface of the prefabricated capping beam segment by the bridge girder erection crane 5, as shown in fig. 6 (a).
Step 2: as shown in fig. 6(b), the mechanical switching device for transversely erecting the beam is used for transferring the capping beam segment N1 to the beam 10(a), the segment N1 is transversely moved to a preset position through the rail of the beam 10(a), and the bridge girder erection crane overhead crane 5 retreats and lifts the next segment N2, so that the processes can be synchronously carried out, and the erection efficiency is improved.
And step 3: as shown in fig. 6(c), after the segment N1 is accurately positioned, the segment N1 is placed on the top surface of the pier column, grouting is performed to combine the segment N1 with the pier column, the step 2 is repeated, the capping beam cantilever side segments N2 and N3 … … Ni are sequentially hoisted in place and sequentially lowered to be glued and spliced with the previous segment, and at the moment, the sling is still used as a temporary support.
And 4, step 4: as shown in fig. 6(d), repeating step 2, sequentially hoisting the segment M1 and the segment M2 on the other side of the segment N1 in place, 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 spliced accurately, but also the reserved steel bars on the pier top need to be butted accurately, grouting is performed after the butting, and the next segment M3 is prepared for splicing.
And 5: and (e) as shown in fig. 6, repeating the step 2, sequentially hoisting the subsequent sections M3 … … Mi in place, and sequentially lowering the sections M3 … … Mi to perform gluing and splicing with the previous section.
Step 6: as shown in fig. 6(f), after all the sections of the bent cap are hoisted in place, all the bent cap prestress is tensioned at one time, and after the tensioning process is completed, slings of all the sections can be cancelled, so that the bent cap is installed.
The embodiments described above are intended to facilitate one of ordinary skill in the art in understanding and using the present invention. It will be readily apparent to those skilled in the art that various modifications to the above-described embodiments may be made, and the generic principles defined herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications to the present invention according to the disclosure of the present invention within the protection scope of the present invention.
Claims (7)
1. A bridge girder erection machine with three working faces and capable of realizing longitudinal and transverse splicing comprises a main truss; the method is characterized in that: the front end of the main truss is supported on a bearing platform of the (n + 3) th span through an auxiliary supporting leg, and a pier column is installed on the bearing platform of the span without establishing a cover beam; a crossbeam is transversely erected at the position, corresponding to the n +3 th span bearing platform, of the bottom of the main truss, and is connected with the main truss through a stiffening support rod or a stiffening cable so as to enable the crossbeam to become a working surface for realizing transverse assembly of the prefabricated cover beam segments, wherein n is a natural number greater than 0;
the main truss is provided with a movable crane for assisting in transporting and installing the prefabricated pier stud, the capping beam segment and the beam slab.
2. A three-face bridge girder erection machine according to claim 1, wherein: the rear part of the main truss is supported at the end part of the beam slab between the nth span and the (n + 1) th span through a rear bearing support leg, the nth span and the (n + 1) th span are provided with piers and capping beams on respective bearing platforms, and the beam slab is erected on the capping beams of the two spans.
3. A three-face bridge girder erection machine according to claim 2, wherein: the middle part of the main truss is supported on the pier stud capping beam of the (n + 2) th span through the front bearing support leg, and a beam slab is not erected between the span and the (n + 3) th span.
4. A three worksurface bridge girder according to claim 3, wherein: and after the assembling work of the capping beam segments is completed on the bearing platform of the (n + 3) th span, transferring the front bearing leg on the capping beam of the (n + 2) th span pier column to the capping beam of the (n + 3) th span pier column, and simultaneously transferring the rear bearing leg to the end part of the beam plate between the (n + 1) th span and the (n + 2) th span.
5. A three-face bridge girder erection machine according to claim 4, wherein: the main truss realizes a span moving process through the moving combination of the front bearing supporting leg and the rear bearing supporting leg, so that the assembling operation of the whole bridge span is completed.
6. A three-face bridge girder erection machine according to claim 1, wherein: and 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.
7. A three-face bridge girder erection machine according to claim 6, wherein: 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 stud, the bent cap section and the beam slab, 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.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110093862A (en) * | 2019-05-31 | 2019-08-06 | 浙江省交通规划设计研究院有限公司 | Vertically and horizontally assembled three working face Bridge Erectors and bent cap can be achieved without sidewalk section assembling engineering method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110093862A (en) * | 2019-05-31 | 2019-08-06 | 浙江省交通规划设计研究院有限公司 | Vertically and horizontally assembled three working face Bridge Erectors and bent cap can be achieved without sidewalk section assembling engineering method |
| CN110093862B (en) * | 2019-05-31 | 2024-04-05 | 浙江数智交院科技股份有限公司 | Three-working-face bridge girder erection machine capable of realizing longitudinal and transverse assembly and bent cap non-channel segment assembly construction method |
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Address after: No.928 yuhangtang Road, Xihu District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang shuzhijiaoyuan Technology Co.,Ltd. Address before: 310006 No. 89 West Ring Road, Zhejiang, Hangzhou Patentee before: ZHEJIANG PROVINCIAL INSTITUTE OF COMMUNICATIONS PLANNING DESIGN & RESEARCH Co.,Ltd. |