CN103541309A - Bending retractable cantilever system of lower guide girder crawler-type bridge erecting machine - Google Patents
Bending retractable cantilever system of lower guide girder crawler-type bridge erecting machine Download PDFInfo
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- CN103541309A CN103541309A CN201310535052.4A CN201310535052A CN103541309A CN 103541309 A CN103541309 A CN 103541309A CN 201310535052 A CN201310535052 A CN 201310535052A CN 103541309 A CN103541309 A CN 103541309A
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- 238000005452 bending Methods 0.000 title abstract 5
- 238000000034 method Methods 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 7
- 230000008602 contraction Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The invention discloses a bending retractable cantilever system of a lower guide girder crawler-type bridge erecting machine. The bending retractable cantilever system comprises a main girder, cantilevers, a cantilever beam, positioning pins, bridge erecting machine supports, a connecting rod, a connecting board and a walking driver. The main girder and the cantilevers are connected together through the connecting rod and the connecting board or a connecting sleeve; the positioning pins are arranged on the lower portion of the main girder, the cantilever beam is disposed on the cantilevers; the bridge erecting machine supports are arranged under the main girder and drivingly connected with the walking motor. According to the lower guide girder crawler-type bridge erecting machine with the bending retractable cantilever system, the retraction process of the cantilever beam does not require long-distance upward or outward bending of the cantilever beam and just needs to integrally retract backwards; during the retraction process of the cantilever beam, the auxiliary supports can support the cantilever beam to move towards the main girder, so that backward retraction of the cantilever beam during a large-cantilever process can be avoided and the security coefficient is relatively high.
Description
Technical field
The present invention relates to a kind of bridge support equipment, specifically turn back telescopic cantilever girder system system of a kind of lower nose girder walking bridging machine, is applicable to set up high-speed railway bridge etc.
Background technology
In recent ten years along with the develop rapidly of China railways Line for Passenger Transportation and high speed railway construction, there is the Bridge Erector of Multiple Type to come into operation, and the pattern of these Bridge Erectors overwhelming majority adopts lower nose girder walking structures, and with the lower nose girder walking bridging machine of semi girder, before setting up tunnel, there are some problems during last hole.
The railway network planning of formulating for 2008 according to China, area, Southwest Mountainous Areas is wanted Developing High-speed or speed rail net equally.According to statistics, these circuit bridge tunnel proportions account for 75%-80% completely, are that bridge tunnel is connected substantially.When setting up last then front hole, because the semi girder of Bridge Erector complete machine is too high, cannot extend in tunnel, often need with crane gear, the semi girder being fixedly installed to be removed, but the job site restriction due to place, tunnel face, crane gear even cannot use sometimes, allows to take crane gear to dismantle, and its construction period is also longer.
The shortcomings such as in order to overcome the problems referred to above, someone has worked out upper folding semi girder and the semi girder Bridge Erector of turning back, but these semi girders exist intensity too low, operation inconvenience.
Summary of the invention
For the deficiencies in the prior art, the technical problem that quasi-solution of the present invention is determined is: turn back telescopic cantilever girder system system of a kind of lower nose girder walking bridging machine is provided.This system is of value to railway and sets up setting up of last bridge before tunnel, makes the Bridge Erector semi girder that this system is housed can realize the contraction of turning back, and has reduced Bridge Erector size, reduces the requirement of Bridge Erector to construction environment of knowing clearly.
The technical scheme that the present invention solve the technical problem is: design the reflexibie telescopic cantilever girder system system of a kind of lower nose girder walking bridging machine, comprise girder, semi girder, semi girder crossbeam, alignment pin, the auxiliary supporting leg of Bridge Erector, connecting rod, junction plate, branch sleeve and movable motor, described girder and semi girder link together by connecting rod, junction plate or branch sleeve; Described alignment pin is positioned at the downside of girder, and semi girder crossbeam is positioned on semi girder; The auxiliary supporting leg of described Bridge Erector is positioned at girder below, and drives and be connected with movable motor; It is characterized in that:, by one section of pulley belt being comprised of roller, there is a turning cylinder in described girder outside at girder and semi girder connecting portion inner side, and described turning cylinder is welded on girder; There is slideway described semi girder inner side; Described semi girder inner track is a long i iron, i iron one end and the welding of Bridge Erector semi girder side; Described girder and semi girder link are inclined-plane;
Described semi girder crossbeam is three-stage structure, comprises left reflexibie section, right reflexibie section and interlude, and interlude is not reflexibie; Described semi girder crossbeam is provided with luffing hydraulic cylinder, inner side steel pin, outside steel pin, inner side otic placode, the prefabricated bolt hole of outside otic placode and semi girder crossbeam bottom, and all parts are symmetrical; On its left and right reflexibie section, all there are an outside steel pin and outside otic placode, for the two ends of connecting cantilever beam crossbeam and semi girder; All there are inner side steel pin and an inner side otic placode in the both sides of semi girder crossbeam interlude, for the interlude of connecting cantilever beam crossbeam and left and right reflexibie section;
Described branch sleeve is the rectangular shape that lacks upper and lower surface of hollow, and inner side is provided with is convenient to semi girder at the chute of branch sleeve inner slide, comprises turning cylinder and sleeve; Described turning cylinder is vertically welded on girder and semi girder link position; Described sleeve is welded on semi girder turning cylinder;
Described semi girder lower end is connected with girder by semi girder connecting rod,, under normal erected state, described semi girder and girder are fastenedly connected by junction plate; And when before setting up tunnel, semi girder need to be shunk in last hole, dismantle girder and semi girder junction plate, at this moment only depend on connecting rod to be connected with girder, connecting rod is driven in semi girder leading portion device for opening; Meanwhile, when semi girder is opened, the rotation anchor point of connecting rod is provided with alignment pin; Described alignment pin is welded in the bottom surface of girder, is positioned at the right side of connecting rod; Described connecting rod is connecting cantilever beam and girder in semi girder crossbeam is turned back opening procedure; Described connecting rod two ends are equipped with axis hole, are connected respectively with the turning cylinder on the turning cylinder of girder medial surface and the branch sleeve of semi girder side, at semi girder opening procedure middle girder downside alignment pin, limit position, guarantee that connecting rod arrives accurate location;
The auxiliary supporting leg of described Bridge Erector is when general erected state, and its upper end is connected by bolt flange and girder crossbeam; When before Bridge Erector is satisfied, set up in last hole, before lower nose girder, be advanced into behind tunnel, pull down the auxiliary supporting leg of Bridge Erector upper end bolt flange, under movable motor drives, auxiliary supporting leg proceeds to below reflexibie semi girder crossbeam, with bolt and semi girder crossbeam below prepared screw-bolt hole bolt, the auxiliary supporting leg of realization is connected with semi girder crossbeam.
Compared with prior art, the invention has the beneficial effects as follows:
1. easy to operate, improved efficiency of construction; Cantilever beam section on semi girder crossbeam, under luffing Hydraulic Cylinder, open become across, auxiliary supporting leg promotes semi girder and runs to girder direction under movable motor drives, this process does not need semi girder to remove and can satisfy front last hole erection, after setting up, can recover voluntarily by inverse process, easy to operate, greatly improved efficiency of construction;
2. reduced construction cost; Whole process need to not carried out auxiliary operation by large-scale extraneous auxiliary equipment such as cranes, has reduced construction cost.
3. safety factor is high; This process does not need length of cantilever distance upwards or turn back in outside, only need wholely to after-contraction, semi girder is in contraction process, and time is carved with auxiliary supporting leg and supports it and move to girder, avoided the semi girder under large cantilever position to carry out fallback action, safety factor is higher.
4. shortened the work period.Whole process does not need semi girder to remove, and need to not carry out auxiliary operation by extraneous main equipment, reduces people's participation, saves manpower and shortens the work period.
Accompanying drawing explanation
The nose girder walking bridging machine overall structure schematic diagram of unified kind of embodiment of telescopic cantilever girder system of turning back under Fig. 1 the present invention;
Fig. 2 is that the semi girder of a kind of embodiment of cantilever beam system of the present invention is opened to become and striden across journey structure principle chart, and wherein, Fig. 2 (A) opens change for semi girder and strides across journey schematic diagram, and Fig. 2 (B) is connecting rod branch sleeve position A-A broken section structural representation;
Fig. 3 is that the cantilever beam system of a kind of embodiment of cantilever beam system of the present invention shrinks the figure that is near completion;
Fig. 4 is the semi girder crossbeam full open position structural representation of a kind of embodiment of cantilever beam system of the present invention;
Fig. 5 is the semi girder crossbeam top view of a kind of embodiment of cantilever beam system of the present invention;
Fig. 6 is the semi girder contraction process figure of a kind of embodiment of cantilever beam system of the present invention, and Fig. 6 (A) is front preparation schematic diagram, and Fig. 6 (B) is schematic diagram in shrinking, and Fig. 6 (C) is final position schematic diagram;
Fig. 7 is that the Bridge Erector of a kind of embodiment of cantilever beam system of the present invention shrinks the view that semi girder sets up last hole, wherein, the view that Fig. 7 (A) sets up front Bridge Erector, Fig. 7 (B) is the view of Bridge Erector while setting up.
The specific embodiment
Below in conjunction with specific embodiment and accompanying drawing thereof, further narrate the present invention, specific embodiment only, for further describing the present invention, does not limit the protection domain of the claims in the present invention.
The reflexibie telescopic cantilever girder system system of lower nose girder walking bridging machine (abbreviation system, referring to Fig. 1-7) of the present invention's design comprises girder 1, semi girder 2, semi girder crossbeam 3, alignment pin 4, the auxiliary supporting leg 5 of Bridge Erector, connecting rod 6, junction plate 7, branch sleeve 8 and movable motor 9; Described girder 1 links together by connecting rod 6, junction plate 7 or branch sleeve 8 with semi girder 2; Described alignment pin 4 is positioned at the downside of girder, and semi girder crossbeam 3 is positioned on semi girder 2; The auxiliary supporting leg 5 of described Bridge Erector is positioned at girder 1 below, and drives and be connected with movable motor 9; It is characterized in that: there is roller 1.1 in described girder 1 outside having a turning cylinder 1.2 in girder 1 and semi girder connecting portion inner side, turning cylinder 1.2 is welded on girder 1; There is slideway 2.1 described semi girder 2 inner sides; Approximately 20 meters of a segment lengths' pulley belt is set up in described girder 1 beam body two outsides, and described pulley belt is comprised of roller 1.1, to realize semi girder inner track 2.1 in semi girder 2 shrinks or recovers opening procedure, along two side rollers, slides; Described semi girder inner track 2.1 is long (embodiment is 1 meter) i iron, the side welding of i iron one end and Bridge Erector semi girder 2; Described girder 1 and semi girder 2 link bevelings, so that semi girder 2 can be directly to master, 1 direction is turned back, and does not need first to turn back forward.
Described semi girder crossbeam 3 is three-stage structure, comprises reflexibie section 3.01, a left side, right reflexibie end 3.02 and interlude 3.03, and interlude 3.03 is not reflexibie; Described semi girder crossbeam 3 is provided with luffing hydraulic cylinder 3.04, inner side steel pin 3.05, outside steel pin 3.06, inner side otic placode 3.07, the prefabricated bolt hole 3.09 of outside otic placode 3.08 and semi girder crossbeam bottom, and all parts are symmetrical; On its left and right reflexibie section, all there are an outside steel pin 3.06 and outside otic placode 3.08, the two ends for connecting cantilever beam crossbeam 3 with semi girder 2; All there are inner side steel pin 3.05 and an inner side otic placode 3.07 in the both sides of semi girder crossbeam interlude 3.03, for the interlude of connecting cantilever beam crossbeam 3 and left and right reflexibie section.On left and right reflexibie section 3.01 of semi girder crossbeam, 3.02, be equipped with a luffing hydraulic cylinder 3.04 being connected with semi girder crossbeam interlude 3.03, realize the horizontal span that semi girder 2 opens and regain and change.
Described branch sleeve 8 is rectangular shapes that lack upper and lower surface of hollow, and inner side is provided with chute so that semi girder in sleeve inner slide, comprises turning cylinder 8.1 and sleeve 8.2; Described turning cylinder 8.1 is vertically welded on girder 1 and semi girder 2 link positions; Described sleeve 8.2 is welded on semi girder turning cylinder 8.1, to guarantee that semi girder 2 can girder slip relatively in sleeve.When Bridge Erector normal operation, semi girder is connected by junction plate 7 with the side of girder connecting portion, and branch sleeve 8 is not worked; In the flexible opening procedure of semi girder, need to unload lower connecting plate 7, now branch sleeve 8 work.
Described semi girder 2 lower ends are connected with girder 1 by semi girder connecting rod 6,, under normal erected state, described semi girder 2 is fastenedly connected by junction plate 7 with girder 1, avoids the connecting rod 6 that connects girder 1 and semi girder 2 to move in normal operation; And when before setting up tunnel, semi girder need to be shunk in last hole, dismantle girder and semi girder junction plate 7, at this moment only depend on connecting rod 6 to be connected with girder, connecting rod 6 is driven in semi girder leading portion device for opening, and the integral body of being convenient to semi girder is opened.Meanwhile, when semi girder 2 is opened, the rotation anchor point of connecting rod 6 is provided with alignment pin 4; Described alignment pin 4 is welded in the bottom surface of girder 1, is positioned at the right side of connecting rod 6; Described connecting rod 6 is connecting cantilever beam 2 and girder 1 in semi girder crossbeam 3 is turned back opening procedure; Described connection girder 1 is single bar linkage structures with the connecting rod 6 of semi girder 2, at connecting rod two ends, being equipped with axis hole is connected with the turning cylinder 8.1 on the turning cylinder 1.2 of girder 1 medial surface and the branch sleeve 8 of semi girder 2 sides respectively, at semi girder 2 opening procedure middle girder downside alignment pins 4, limit position, guarantee that connecting rod 6 arrives accurate location.
The auxiliary supporting leg 5 of described Bridge Erector is when general erected state, and its upper end is connected by bolt flange and girder crossbeam; When before Bridge Erector is satisfied, set up in last hole, before lower nose girder, be advanced into behind tunnel, pull down the auxiliary supporting leg 5 upper end bolt flanges of Bridge Erector, under movable motor 9 drives, auxiliary supporting leg 5 proceeds to below reflexibie semi girder crossbeam 3, with bolt and semi girder crossbeam 3 below prepared screw-bolt hole 3.10 bolts, the auxiliary supporting leg 5 of realization is connected with semi girder crossbeam 3.
It is as follows to the concrete grammar of girder 1 direction contraction that the present invention realizes semi girder 2:
The first step: the disassembling bolts first auxiliary supporting leg of Bridge Erector 5 tops being connected with girder front beam, start auxiliary supporting leg movable motor 9, under movable motor 9 drives, auxiliary supporting leg runs to semi girder crossbeam 3 belows, with bolt, the upper flanges of auxiliary supporting leg 5 is connected with semi girder crossbeam 3 bottom bolts holes 3.09, the auxiliary supporting leg 5 of realization is connected with semi girder crossbeam 3.
Second step: screw off the bolt on girder 1 and semi girder 2 junction plates, the junction plate 7 between dismounting girder 1 and semi girder 2 and the inner side otic placode 3.08 on semi girder crossbeam 3; Luffing hydraulic cylinder 3.04 promotes the semi girder left and right section of turning back and launches laterally, realizing turning back of semi girder crossbeam 3 opens, in opening procedure, semi girder 2 is upper left with semi girder, the camber line of the right folding section of turning moves expansion to girder 1 direction, is connected to connecting rod 6 on girder 1 along with the movement of semi girder 2 and semi girder crossbeam is upper left, right folding turns segment sync and opens.Now branch sleeve 8 keeps relative position constant with semi girder 2.When connecting rod 6 contact girder 1 downside alignment pins 4 and when just vertical with semi girder 2 opening procedure finish.Open afterwards with between the left and right section of turning back 3.01,3.02 of steel pin cantilever mounted beam crossbeam and interlude 3.03 two inner side otic placodes 3.07, realize semi girder 2 medial surface spacing and be greater than girder 1 outside spacing.
The 3rd step: the auxiliary supporting leg 5 of Bridge Erector drags semi girder 2 and slowly walks to girder 1 direction under the drive of movable motor 9, and sleeve 8.2 holding positions are constant in the process of walking, and the relative sleeve 8.2 of semi girder 2 slowly arrives the position meeting the demands.Outside semi girder walking process middle sleeve 8.2 and connecting rod 6 and girder, side wheel 1.1 plays the effect of support cantilever beam 2 front ends, and semi girder 2 other ends are by assisting supporting leg 5 to support.Cantilever mounted beam 2 behind in-position, completes the contraction process of semi girder 2.
It is the inverse process of above-mentioned contraction process that semi girder 2 of the present invention recovers cantilever position process, and method of operating is consistent with contraction process, does not repeat.
" left side " of using during contractile folding cantilever beam system description scheme of the present invention, " right side ", " inner side ", " outside " etc. are that to take the orientation of given accompanying drawing be foundation, it is convenient that they are only used to statement, be used for distinguishing the relative position of each parts or direction, do not represent orientation when contractile folding cantilever beam system of the present invention is used.
The present invention does not address part and is applicable to prior art.
Claims (2)
1. the lower nose girder walking bridging machine telescopic cantilever girder system system of turning back, comprise girder, semi girder, semi girder crossbeam, alignment pin, the auxiliary supporting leg of Bridge Erector, connecting rod, junction plate, branch sleeve and movable motor, described girder and semi girder link together by connecting rod, junction plate or branch sleeve; Described alignment pin is positioned at the downside of girder, and semi girder crossbeam is positioned on semi girder; The auxiliary supporting leg of described Bridge Erector is positioned at girder below, and drives and be connected with movable motor; It is characterized in that:, by one section of pulley belt being comprised of roller, there is a turning cylinder in described girder outside at girder and semi girder connecting portion inner side, and described turning cylinder is welded on girder; There is slideway described semi girder inner side; Described semi girder inner track is a long i iron, i iron one end and the welding of Bridge Erector semi girder side; Described girder and semi girder link are inclined-plane;
Described semi girder crossbeam is three-stage structure, comprises left reflexibie section, right reflexibie section and interlude, and interlude is not reflexibie; Described semi girder crossbeam is provided with luffing hydraulic cylinder, inner side steel pin, outside steel pin, inner side otic placode, the prefabricated bolt hole of outside otic placode and semi girder crossbeam bottom, and all parts are symmetrical; On its left and right reflexibie section, all there are an outside steel pin and outside otic placode, for the two ends of connecting cantilever beam crossbeam and semi girder; All there are inner side steel pin and an inner side otic placode in the both sides of semi girder crossbeam interlude, for the interlude of connecting cantilever beam crossbeam and left and right reflexibie section;
Described branch sleeve is the rectangular shape that lacks upper and lower surface of hollow, and inner side is provided with is convenient to semi girder at the chute of branch sleeve inner slide, comprises turning cylinder and sleeve; Described turning cylinder is vertically welded on girder and semi girder link position; Described sleeve is welded on semi girder turning cylinder;
Described semi girder lower end is connected with girder by semi girder connecting rod, and under normal erected state, described semi girder and girder are fastenedly connected by junction plate; And when before setting up tunnel, semi girder need to be shunk in last hole, dismantle girder and semi girder junction plate, at this moment only depend on connecting rod to be connected with girder, connecting rod is driven in semi girder leading portion device for opening; Meanwhile, when semi girder is opened, the rotation anchor point of connecting rod is provided with alignment pin; Described alignment pin is welded in the bottom surface of girder, is positioned at the right side of connecting rod; Described connecting rod is connecting cantilever beam and girder in semi girder crossbeam is turned back opening procedure; Described connecting rod two ends are equipped with axis hole, are connected respectively with the turning cylinder on the turning cylinder of girder medial surface and the branch sleeve of semi girder side, at semi girder opening procedure middle girder downside alignment pin, limit position, guarantee that connecting rod arrives accurate location;
The auxiliary supporting leg of described Bridge Erector is when general erected state, and its upper end is connected by bolt flange and girder crossbeam; When before Bridge Erector is satisfied, set up in last hole, before lower nose girder, be advanced into behind tunnel, pull down the auxiliary supporting leg of Bridge Erector upper end bolt flange, under movable motor drives, auxiliary supporting leg proceeds to below reflexibie semi girder crossbeam, with bolt and semi girder crossbeam below prepared screw-bolt hole bolt, the auxiliary supporting leg of realization is connected with semi girder crossbeam.
2. turn back telescopic cantilever girder system system of a kind of lower nose girder walking bridging machine according to claim 1, is characterized in that: the connecting rod of described connection girder and semi girder is single bar linkage structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310535052.4A CN103541309B (en) | 2013-10-31 | 2013-10-31 | A kind of lower nose girder walking bridging machine is turned back telescopic cantilever girder system system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310535052.4A CN103541309B (en) | 2013-10-31 | 2013-10-31 | A kind of lower nose girder walking bridging machine is turned back telescopic cantilever girder system system |
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| Publication Number | Publication Date |
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| CN103541309A true CN103541309A (en) | 2014-01-29 |
| CN103541309B CN103541309B (en) | 2015-09-30 |
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| CN201310535052.4A Expired - Fee Related CN103541309B (en) | 2013-10-31 | 2013-10-31 | A kind of lower nose girder walking bridging machine is turned back telescopic cantilever girder system system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105937206A (en) * | 2016-05-05 | 2016-09-14 | 武汉市创先专利技术服务有限公司 | Prefabricated assembly type viaduct bridge plate and installation device thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3985480A (en) * | 1972-08-18 | 1976-10-12 | Dyckerhoff & Widmann Ag | Apparatus for the sectional cantilever construction of bridge girder systems |
| CN201817776U (en) * | 2010-04-19 | 2011-05-04 | 郑州新大方重工科技有限公司 | Rearward rotary foldable cantilever beam system of main machine of lower guide beam walking-type railway bridge girder erection machine |
| CN202047375U (en) * | 2010-12-02 | 2011-11-23 | 秦皇岛天业通联重工股份有限公司 | Universal bridging machine for inside and outside high-speed railway tunnel |
| CN203080418U (en) * | 2012-12-28 | 2013-07-24 | 郑州市华中建机有限公司 | Segment assembly type bridge girder erection machine |
| CN203546622U (en) * | 2013-10-31 | 2014-04-16 | 河北工业大学 | Folding-turning retractable type cantilever beam system of lower guide beam walking type bridge girder erection machine |
-
2013
- 2013-10-31 CN CN201310535052.4A patent/CN103541309B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3985480A (en) * | 1972-08-18 | 1976-10-12 | Dyckerhoff & Widmann Ag | Apparatus for the sectional cantilever construction of bridge girder systems |
| CN201817776U (en) * | 2010-04-19 | 2011-05-04 | 郑州新大方重工科技有限公司 | Rearward rotary foldable cantilever beam system of main machine of lower guide beam walking-type railway bridge girder erection machine |
| CN202047375U (en) * | 2010-12-02 | 2011-11-23 | 秦皇岛天业通联重工股份有限公司 | Universal bridging machine for inside and outside high-speed railway tunnel |
| CN203080418U (en) * | 2012-12-28 | 2013-07-24 | 郑州市华中建机有限公司 | Segment assembly type bridge girder erection machine |
| CN203546622U (en) * | 2013-10-31 | 2014-04-16 | 河北工业大学 | Folding-turning retractable type cantilever beam system of lower guide beam walking type bridge girder erection machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105937206A (en) * | 2016-05-05 | 2016-09-14 | 武汉市创先专利技术服务有限公司 | Prefabricated assembly type viaduct bridge plate and installation device thereof |
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| CN103541309B (en) | 2015-09-30 |
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