CN104947600A - Incremental launching construction platform - Google Patents

Incremental launching construction platform Download PDF

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Publication number
CN104947600A
CN104947600A CN201510209806.6A CN201510209806A CN104947600A CN 104947600 A CN104947600 A CN 104947600A CN 201510209806 A CN201510209806 A CN 201510209806A CN 104947600 A CN104947600 A CN 104947600A
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China
Prior art keywords
platform
incremental launching
launching construction
construction platform
height
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CN201510209806.6A
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CN104947600B (en
Inventor
肖向荣
高世强
马水英
刘怀刚
胡建峰
檀兴华
张铮
葛继平
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Road and Bridge International Co Ltd
Road and Bridge South China Engineering Co Ltd
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Road and Bridge International Co Ltd
Road and Bridge South China Engineering Co Ltd
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Abstract

The invention discloses an incremental launching construction platform disposed on preset piers. One end, close to bridge segments pushed out, of the incremental launching construction platform is defined as the front end. The incremental launching construction platform comprises a front-end platform and a tail-end platform which are disposed on two sides of the piers and connected end to end, wherein the front-end platform is close to the front end, and the tail-end platform is away from the front end; each of the front-end platform and the tail-end platform comprises a load-bearing system and a slideway system disposed above the load-bearing system; the height difference between the slideway system and the load-bearing system of the front-end platform decreases progressively from the positions of the piers to the front end, and the height difference between the slideway system and the load-bearing system of the tail-end platform increases progressively from the positions of the piers to the rear end. The incremental launching construction platform has the advantages that stress-free assembling of complex linear bridge girders can be achieved, incremental launching construction is guaranteed, construction efficiency is increased, and construction quality is increased.

Description

Incremental launching construction platform
Technical field
The present invention relates to a kind of road and bridge construction technology, particularly relate to the incremental launching construction platform that a kind of bridge incremental launching construction uses.
Background technology
The construction of the many application of push construction method and prestressed reinforced concrete uniform section continuous girder bridge and cable-stayed bridge.Be specially beam body at end of the bridge paragraph by paragraph pouring or assembled, with the longitudinal pushing tow of jack, make beam body by the interim sliding support face of each Dun Ding construction method in place.Incremental launching construction arranges construction plant at the rear of abutment, segmented casting beams body, and sections will be built with longitudinal prestressing muscle and completed beam body is linked to be entirety, before beam body, installation length is the steel nose girder of pushing tow across footpath designated ratio, then exerted a force by level jack, by beam body forwards pushing tow go out construction plant.Repeat these operations and can complete whole beam body construction.
By pushing process, described interim sliding support face again platform for lining provide, described platform for lining is at the unstressed line style platform for lining to the spelling stage being steel tank girder segment, and be the sliding platform of back end beam section in the pushing tow stage, the former requires that platform for lining possesses enough strength and stiffness, and have for the absolute altitude regulation measure to spelling, the latter requires platform for lining has girder steel sliding system and guiding device.
Summary of the invention
The object of the invention is, provide a kind of and realize the unstressed assembled of complicated linear bridge main beam, guarantee the incremental launching construction platform of incremental launching construction safety.
For reaching above technical purpose, the technical solution used in the present invention is as follows:
A kind of incremental launching construction platform, this incremental launching construction platform is arranged between default pier stud, wherein, the one end defining the close bridge fragment ejected in this incremental launching construction platform is front end, and described incremental launching construction platform comprises the front-end platform of close front end of head and the tail connection and the tail end platform away from front end that are arranged on described default pier stud both sides; Described front-end platform and tail end platform comprise load bearing system respectively and are arranged on the chute system above this load bearing system; Difference in height between the chute system of described front-end platform and load bearing system forward end from described pier stud position is successively decreased, and the difference in height between the chute system of described tail end platform and load bearing system caudad increases progressively from described pier stud position.
For realizing technical purpose of the present invention, the height that difference in height between the chute system of described front-end platform and load bearing system reduces unit ratio with unit length successively decreases, and the height that the difference in height between the chute system of described tail end platform and load bearing system increases unit ratio with unit length increases progressively.
Preferably, described unit length is 10m; Described unit ratio is 1%.
About described load bearing system: described load bearing system comprises lower end and is positioned the steel pipe pile of construction plant soil layer and is erected at the lower end spandrel girder of described steel pipe pile upper end, Bailey truss and upper end distribution beam successively.
About described chute system: described front-end platform and tail end platform chute system separately include the slideway extended at described incremental launching construction platform longitudinally be arranged on above corresponding load bearing system, multiple shift unit being limited motion track by described slideway, and for adjusting the adjusting device of described shift unit height and horizontal level.
Preferably, described adjusting device comprises the height adjuster be arranged on above each described shift unit and the horizontally tracting device being arranged on each described shift unit horizontal direction.
Preferably, described slideway comprises at least one main skid secondary slideway parallel with this main skid with at least one.
More preferably, the height of the body of described main skid is greater than the height of the body of described secondary slideway.
Compared with prior art, the present invention has following advantage:
(1) incremental launching construction platform provided by the invention, its front end is low, tail end is high, and form gentle slope between front end and tail end, when bridge fragment pushing tow is to the front end of this incremental launching construction platform, the chute system of described bridge fragment and incremental launching construction platform automatically disengages, facilitate the subsequent operation of workman, also improve efficiency of construction;
(2) incremental launching construction platform provided by the invention, its chute system preferably arranges a main skid for jacking and pushing bridge fragment and top secondary slideway a little less than main skid, this secondary slideway facilitates workman that shift unit guiding is turned back to platform tail end, achieve the free of discontinuities incremental launching construction of this incremental launching construction platform, improve efficiency of construction.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of incremental launching construction platform of the present invention, illustrates that bridge fragment is in the state on this incremental launching construction platform.
Fig. 2 is the sectional structure schematic diagram in the A-A direction of Fig. 1.
Fig. 3 is the close-up schematic view of part B in Fig. 2.
Fig. 4 is the working state schematic representation of the shift unit jacking and pushing bridge sections/fragment in incremental launching construction platform of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
With reference to figure 1, incremental launching construction platform 1 of the present invention is arranged between default bridge pier column 2.At this, the direction near the bridge fragment ejected is defined as front end (that is, the left side in Fig. 1), otherwise is tail end (that is, the right side in Fig. 1).In the present embodiment, this incremental launching construction platform 1, across at least two described pier studs 2, is respectively the pier stud 22 near front end and the pier stud 21 being positioned at described pier stud 22 tail end.Further, described incremental launching construction platform 1 comprises and is separately positioned on front-end platform 1a between pier stud 22 and pier stud 21 and is arranged on rear side of pier stud 21 (namely, right side in Fig. 1) tail end platform 1b, and this front-end platform 1a and tail end platform 1b head and the tail are connected.
Described front-end platform 1a and tail end platform 1b has the chute system 12 that identical structure includes load bearing system 11 and is arranged on above this load bearing system 11.To only be described the structure of tail end platform 1b below, the structure for front-end platform 1a then repeats no more.
With reference to figure 1 and Fig. 2, for described tail end platform 1b, described load bearing system 11 comprises steel pipe pile 111 from below to up successively, the lower end spandrel girder 112 be arranged on steel pipe pile 111, the upper end distribution beam 114 that is arranged on the Bailey truss 113 on lower end spandrel girder 112 and is positioned on Bailey truss 113.As the bottom load-carrying members of described incremental launching construction platform 1, the lower end of described steel pipe pile 111 needs the soil layer being positioned construction plant, and it is dark that the present embodiment arranges described steel pipe pile 111 5m that buries.Further, for ensureing the strength and stiffness of other structures of described load bearing system 11, described steel pipe pile 111, while ensureing certain embedded depth, also needs the verticality ensureing each described steel pipe pile 111.
Referring to figs. 2 and 3, described chute system 12 is arranged on the top of described load bearing system 11, specifically be arranged on the top of described upper end distribution beam 114, this chute system 12 is included in slideway 121 and multiple shift unit 122 being limited motion track by described slideway 121 that described incremental launching construction platform 1 longitudinally extends.Preferably, described chute system 12 arranges at least two described slideways 121, respectively as main skid 121a and secondary slideway 121b.
As shown in Figure 3, described main skid 121a comprises and is fixed on main skid spandrel girder 121a1 above described upper end distribution beam 114, is fixed on the main chute 121a2 above described main skid spandrel girder 121a1 and is positioned at the slideway inner panel 121a3 of this main chute 121a2.Preferably, described main skid spandrel girder 121a1 adopts 2I45a type track spandrel girder to make, and its both sides are fixed in described upper end distribution beam 114 by the support of " eight " word.Described slideway inner panel 121a3 preferably adopts the steel plate that 2cm is thick, and its end face scribbles the butter for reducing friction.
Similarly, described secondary slideway 121b comprises the secondary slideway spandrel girder 121b1 be fixed on above described upper end the distribution beam 114 and secondary chute 121b2 be fixed on above described secondary slideway spandrel girder 121b1.Compared with described main skid 121a, described secondary slideway 121b difference is structurally: one, and the secondary slideway spandrel girder 121b1 of this secondary slideway 121b is little relative to the height of upper end distribution beam 114 relative to the aspect ratio main skid spandrel girder 121a1 of upper end distribution beam 114; The strength ratio main skid spandrel girder 121a1's of the steel that its secondary slideway spandrel girder 121b1 of two, this secondary slideway 121b adopts is little; Its three, this secondary slideway 121b does not arrange slideway inner panel.
With reference to figure 3 and Fig. 4, described shift unit 122 is limited in described main chute 121a2 or secondary chute 121b2, and sliding friction can be relied under limiting to move along the longitudinally of this incremental launching construction platform 1 in the guiding of described main chute 121a2 or secondary chute 121b2.This shift unit 122 play supporting role to bridge fragment 3 in the splicing stage of bridge fragment, in pushing tow stage of bridge fragment 3 to bridge fragment 3 draws.For realizing described supporting role, the top of this shift unit 122 is provided with the height adjuster 1231 (Fig. 3) for adjusting bridge fragment 3 absolute altitude, specifically realizes by jack; For realizing described draw, this shift unit 122 is provided with the horizontally tracting device 1232 (Fig. 4) for drawing bridge fragment 3 movement in the horizontal direction, specifically also realizes by jack; Described height adjuster 1231 and horizontally tracting device 1232 constitute the adjusting device 123 of described shift unit 122.Those skilled in the art know, and the device that can realize the multi-faceted position adjustment of shift unit 123 all thinks the way of realization belonging to described adjusting device 123.
Difference in height is there is between the respective load bearing system 11 of described front-end platform 1a and tail end platform 1b and chute system 12, wherein for described front-end platform 1a, its difference in height is successively decreased towards front end from the position at described pier stud 21 place, and for described tail end platform 1b, then its difference in height increases progressively towards tail end from the position at described pier stud 21 place.Thus, relative to whole incremental launching construction platform 1, described two differences in height are successively decreased from its tail end to front end on the whole, are formed from the downward-sloping gentle slope of tail end forward end.Further, the height that the increasing or decreasing of described difference in height preferably reduces/increase unit ratio with unit length realizes, and the present embodiment height that preferably every 10m reduces/increase by 1% successively decreases/increases progressively.
Those skilled in the art should be appreciated that, according to the actual conditions of bridge, described incremental launching construction platform 1 is not necessarily one of them strong point with described pier stud 2, now, this incremental launching construction platform 1 forms continuous print structure, designs the gentle slope downward-sloping from tail end forward end of this incremental launching construction platform according to the condition of construction of reality
The structure of the course of work to this incremental launching construction platform below by way of this incremental launching construction platform is further described:
One, to the spelling stage
After described incremental launching construction platform 1 has been set up according to the structure of aforementioned setting, prefabricated bridge subsection (sign) is lifted on the shift unit 122 of described incremental launching construction platform 1, then by described horizontally tracting device 1232, each described bridge subsection is moved forward to position to be assembled.According to the controling parameters such as beam section plan-position, front and back end absolute altitude that monitored instruction provides, plan-position and the absolute altitude of the described bridge subsection of adjustment is coordinated by described adjusting device 123 (comprising height adjuster 1231 and horizontally tracting device 1232) and/or other adjusting devices, after indices all meets the demands, each described bridge subsection adjusted is located with horse plate temporarily, then according to correct welding procedure, the girth welding of bridge subsection is carried out.After girth welding completes, according to design and regulation and stipulation, carry out weld seam nondestructive testing, detect qualified after namely complete the assembled work of described bridge subsection, obtain the bridge fragment that comprises multiple described bridge subsection 3.
Two, the pushing tow stage
Described bridge fragment 3 is displaced downwardly to next operating position in the traction of the horizontally tracting device 1232 of described shift unit 122, regulate the plan-position of described bridge fragment 3 and vertical camber, after making its line style meet the requirement of unstressed line style, carry out connecing welding with the bridge fragment ejected.After completing spelling welding sequence, the bridge fragment can spliced this carries out pushing tow.Under the multi-faceted corrective action of described adjusting device 123, described shift unit 122 carries described bridge fragment and moves forward along described main skid 121a, when described shift unit 122 walks to the front end of described incremental launching construction platform 1, the gentle slope that this shift unit 122 can be formed because of above-mentioned difference in height automatically disengages described bridge fragment, by artificial, shift unit 122 is gone to parallel secondary slideway 121b afterwards, then described shift unit 122 returns the tail end of this incremental launching construction platform 1 along this secondary slideway 121b, again the transfer of this shift unit 122 is got back to the incremental launching construction process that described main skid 121a is used for next one.
In sum, incremental launching construction platform of the present invention can realize the unstressed assembled of complicated linear bridge main beam, guarantees incremental launching construction safety, improves efficiency of construction, improves construction quality.
Above-described embodiment is the present invention's preferably embodiment; but be not merely restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be all included within protection scope of the present invention.

Claims (9)

1. an incremental launching construction platform, this incremental launching construction platform is arranged between default pier stud, it is characterized in that: the one end defining the close bridge fragment ejected in this incremental launching construction platform is front end, described incremental launching construction platform comprises the front-end platform of close front end of head and the tail connection and the tail end platform away from front end that are arranged on described default pier stud both sides; Described front-end platform and tail end platform comprise load bearing system respectively and are arranged on the chute system above this load bearing system; Difference in height between the chute system of described front-end platform and load bearing system forward end from described pier stud position is successively decreased, and the difference in height between the chute system of described tail end platform and load bearing system caudad increases progressively from described pier stud position.
2. incremental launching construction platform as claimed in claim 1, it is characterized in that: the height that the difference in height between the chute system of described front-end platform and load bearing system reduces unit ratio with unit length successively decreases, the height that the difference in height between the chute system of described tail end platform and load bearing system increases unit ratio with unit length increases progressively.
3. incremental launching construction platform as claimed in claim 2, is characterized in that: described unit length is 10m.
4. incremental launching construction platform as claimed in claim 2, is characterized in that: described unit ratio is 1%.
5. incremental launching construction platform as claimed in claim 1, is characterized in that: described load bearing system comprises lower end and is positioned the steel pipe pile of construction plant soil layer and is erected at the lower end spandrel girder of described steel pipe pile upper end, Bailey truss and upper end distribution beam successively.
6. incremental launching construction platform as claimed in claim 1, it is characterized in that: described front-end platform and tail end platform chute system separately include the slideway, the multiple shift unit being limited motion track by described slideway that extend at described incremental launching construction platform longitudinally that are arranged on above corresponding load bearing system, and for adjusting the adjusting device of described shift unit height and horizontal level.
7. incremental launching construction platform as claimed in claim 6, is characterized in that: described adjusting device comprises the height adjuster be arranged on above each described shift unit and the horizontally tracting device being arranged on each described shift unit horizontal direction.
8. incremental launching construction platform as claimed in claim 6, is characterized in that: described slideway comprises at least one main skid secondary slideway parallel with this main skid with at least one.
9. incremental launching construction platform as claimed in claim 8, is characterized in that: the height of the body of described main skid is greater than the height of the body of described secondary slideway.
CN201510209806.6A 2015-04-27 2015-04-27 Incremental launching construction platform Active CN104947600B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105507160A (en) * 2015-11-25 2016-04-20 杭州江润科技有限公司 Method of operation platform for movable-type bailey beams for construction of cast-in-place box beams
CN109706849A (en) * 2019-01-18 2019-05-03 中交第一航务工程局有限公司 A kind of construction technology of specific line style bridge incremental launching platform
CN112647418A (en) * 2020-12-18 2021-04-13 中建八局第三建设有限公司 Variable cross-section continuous beam bridge pushing construction device

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CN103510474A (en) * 2013-09-26 2014-01-15 中铁建设集团有限公司 Elastic bearing sliding device for incremental launching construction
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105507160A (en) * 2015-11-25 2016-04-20 杭州江润科技有限公司 Method of operation platform for movable-type bailey beams for construction of cast-in-place box beams
CN105507160B (en) * 2015-11-25 2017-04-26 杭州江润科技有限公司 Method of operation platform for movable-type bailey beams for construction of cast-in-place box beams
CN109706849A (en) * 2019-01-18 2019-05-03 中交第一航务工程局有限公司 A kind of construction technology of specific line style bridge incremental launching platform
CN112647418A (en) * 2020-12-18 2021-04-13 中建八局第三建设有限公司 Variable cross-section continuous beam bridge pushing construction device

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