CN102747691B - Integral pushing erection method for truss girders - Google Patents
Integral pushing erection method for truss girders Download PDFInfo
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- CN102747691B CN102747691B CN201210272947.9A CN201210272947A CN102747691B CN 102747691 B CN102747691 B CN 102747691B CN 201210272947 A CN201210272947 A CN 201210272947A CN 102747691 B CN102747691 B CN 102747691B
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Abstract
The invention relates to an integral pushing erection method for truss girders. The method comprises the following steps: splicing the truss girders, and enabling the two spliced truss girders (a left girder and a right girder) to be connected through a horizontal connecting steel pipe so that the integrated truss girders are formed; installing continuous-action jacks, installing a working platform between the two truss girders, and enabling two sides of the working platform to be respectively provided with one continuous-action jack; installing steel strands, enabling at least one steel strand to penetrate through the inside of the continuous-action jack of each side, enabling one ends of the steel strands to be anchored on bridge piers in front of the truss girders, and enabling the other ends of the steel strands to droop naturally; pushing and horizontally moving the truss girders, enabling the truss girders to pass across the bridge piers; and enabling horizontal jacks to be further installed at the tops of the bridge piers so that horizontal movement of the truss girders can be achieved. By the integral pushing erection method for the truss girders, the inverted triangular truss girders can be integrally pulled in place, the assembly difficulty is reduced, safety and efficiency are improved, the horizontal movement alignment is accurate, and butt joint quality of the truss girders is guaranteed.
Description
Technical field
The present invention relates to method for bridge construction, particularly a kind of girder truss integral pushing erection method.
Background technology
In current method for bridge construction, jack-in erection used is mainly the method for girder truss single width list jacking row jack-in erection, a jack is installed on each truss girder, after each run pushing tow, need to pull down jack and then reinstall jack just can carry out in another position of girder truss on pushing tow once, integral pushing, traversing when such single width monolithic jack-in erection method can not realize the successively incremeantal launching method of girder truss and two truss girders, especially can not meet the jack-in erection of the poor inverted triangle form girder of self stability.
Summary of the invention
The object of the invention is to overcome and existingly in prior art can not meet inverted triangular truss beam double width girder dilatory jack-in erection, traversing simultaneously, provide can overall time dilatory and put in place, transverse shifting aims at accurate girder truss integral pushing erection method.
In order to realize foregoing invention object, the invention provides following technical scheme:
Girder truss integral pushing erection method, comprises the following steps:
The first step, assembled truss girder, be linked to be overall girder truss by assembled two truss girders that complete (left width girder, right width girder);
Second step, installation continuous action jack, installation work platform on the horizontal-associate steel pipe between two truss girders, described working platform both sides are respectively equipped with continuous action jack, and hydraulic oil pump and the electromagnetic valve of controlling both sides continuous action jack jacking force are also installed on described working platform;
The 3rd step, installation steel strand, inner through there being at least one steel strand at described continuous action jack, described steel strand one end through co-continuous effect jack front end is anchored on the bridge pier in girder truss front, the described steel strand other end through continuous action jack tail end naturally droops, and has debugged the prestressing force of steel strand before pushing tow;
The 4th step, girder truss pushing tow, master station sends pushing tow instruction, the continuous action jack that is arranged on working platform both sides is realized the successively incremeantal launching method to girder truss, another jack oil return while being jack tension steel strand in continuous action jack, thereby reach the alternately continuity of pushing tow girder truss, if any stopping extremely at any time and carry out stressed detection;
The 5th step, girder truss are crossed pier, under the effect of continuous action jack, girder truss pushing tow is crossed pier, and before bridge pier is being crossed in the position at continuous action jack place, change in advance the steel strand anchoring point on bridge pier, steel strand anchoring point on bridge pier, is prepared for again taking turns pushing tow all the time before the girder truss of pushing tow.
Girder truss single width list top relatively, the continuous action jack that the present invention selects can be realized the function that is similar to two jack that are cascaded, i.e. another oil return while carrying out pushing tow, another pushing tow again while carrying out oil return, so just can realize the continuous pushing tow of girder truss; Because each truss girder is separately installed with a continuous action jack, by hydraulic oil pump and electromagnetic valve, can realize the integrated moving of two truss girders in addition.
Preferably, two described truss girders are connected into entirety by the horizontal even steel pipe of lower edge, the horizontal steel pipe connecting that connects that winds up.
Preferably, described continuous action jack is connected with three steel strand, and described steel strand are anchored at respectively on three bridge piers in girder truss front.
Three steel strand are anchored at respectively on three bridge piers in girder truss front, continuous action jack is in the time of pushing tow like this, the steel strand under tension simultaneously that is anchored at three bridge piers in front, has passed to first three pier stud by dilatory force, has reduced the impact of pushing tow pulling force on pier stud.
Preferably, described continuous action jack is connected with reaction frame, and described reaction frame is arranged on the horizontal even steel pipe of lower edge steel pipe.
Continuous action jack is bolted on reaction frame, reaction frame connects on the horizontal even steel pipe of lower edge steel pipe, continuous action jack passes to girder truss by reaction frame jacking force, the stressed meeting of girder truss more evenly, advance more steadily, avoided that directly continuous action jack is arranged on to the stress of discontinuity while drawing on girder truss and concentrated the girder truss local buckling causing.
Preferably, described reaction frame is provided with the connecting hole that can pass steel hinge line.
Preferably, described reaction frame is by bolt two fastening anchor ears mutually, described two anchor ears form with lower edge is horizontal and connect the circular hole that steel pipe radius equates, and anchor ear is provided with and the orthogonal connecting hole of circular hole, are provided with the steel plate that can connect continuous action jack outside described connecting hole.
Reaction frame is made up of two anchor ears, the circle hole radius forming by bolton anchor ear and lower edge be horizontal, and to connect steel pipe the same, reaction frame just can be arranged on the horizontal even steel pipe of lower edge like this, again continuous action jack is connected on anchor ear, in the time of pushing tow truss girder, than directly reaction frame being welded on truss girder, truss girder distortion is less like this, stressed more even, moving also can be more stable.
Preferably, the described stressed detection method of girder truss pushing tow is in the time that the every sections of girder truss starts pushing tow, can adopt and first advance a bit of distance (as 5cm), stop immediately, continuous action jack pine tar is pressed, then advances a bit of distance (as 5cm), stop again, whether continuous action jack again pine tar is pressed, for this reason repeatedly twice or thrice, all stressed to check girder truss.
Preferably, described continuous action jack is synchronously step by step when afterburning pushing tow girder truss, when girder truss is during in critical condition, keep the jack oil pressure of a certain size power (as 600KN) to stablize motionless, to prevent that truss from the uniform velocity not advancing, then order is afterburning: first adjust all directions synchronously stressed, more synchronous reinforcing step by step.
Preferably, described pier stud is provided with the horizontal jack that can make girder truss transverse shifting, on described horizontal jack, Hydraulic Station is also installed, and is used for controlling the solenoid operated directional valve of oil pressure in permissible range.
In the time that girder truss carries out pushing tow on small radius circular curve, because continuous action jack girder truss when the pushing tow is to move along a straight line, at this moment on girder truss before pier, if girder truss is not aimed at bridge pier, need to carry out transverse shifting, now be arranged on the horizontal jack on pier stud, can realize and adjust girder truss lateral displacement; Often, in actual mechanical process, reaction frame is fixed in the middle of the spacing steel pin of both sides, slideway front and back, jack, by directly contacting with dilatory tugboat side, is adjusted girder position by traversing tugboat position, thereby realizes the transverse shift of girder.Continuous action jack pushing tow girder truss vertically moves and the horizontal common coordination energy of the traversing girder truss of jack is realized girder truss pushing tow operation on small radius circular curve.
Preferably, described continuous action jack 1 shift motion of simultaneously having worked, whether synchronously vertically move according to the left width girder of girder truss, right width girder, judge whether to start left width girder continuous action jack respectively or simultaneously, right width girder continuous action jack is adjusted, beam body is pushed ahead evenly, realize each pier synchronous push.
compared with prior art, beneficial effect of the present invention:
Girder truss integral pushing erection method of the present invention, continuously dragging when adopting continuous action jack to realize left and right width girder truss.Girder truss can realize that overall time is dilatory to put in place after completing assembled place is assembled like this, reduces the aerial assembly difficulty of horizontal-associate between left width and right width, and work high above the ground has been become to Ground Operation, assembly difficulty reduction, and assembly quality is guaranteed.Simultaneously left and right width truss girder while pushing tow after assembled completing simultaneously has greatly increased self stability concerning the girder truss of inverted triangle form, reduces the security risk of single width pushing tow.Compare general girder truss dilatory, it is fast that girder truss integral pushing method also has speed, safe, can ensure the aerial exactitude position of girder truss; Especially utilize horizontal jack pair girder truss to carry out transverse shifting, add vertically moving of continuous action jack pushing tow girder truss, can realize the movement of girder truss on small radius circular curve, ensured the joint quality of girder truss.
Brief description of the drawings:
Fig. 1 is the scheme of installation of jack of the present invention and girder truss;
Fig. 2 is the partial structurtes schematic diagram of Fig. 1;
Fig. 3 is the A-A sectional drawing of Fig. 2;
Fig. 4 is the B-B sectional drawing of Fig. 2;
Fig. 5 is the structural representation of reaction frame in Fig. 2;
Fig. 6 is the left view of Fig. 5.
Fig. 7 is the another kind of structural representation of reaction frame.
Mark in figure:
1, working platform, 2, continuous action jack, 3, the horizontal steel pipe that connects of lower edge, 4, lower edge steel pipe, 5, reaction frame, 6, connecting hole, 7, bridge pier, 8, guardrail, 9, the horizontal steel pipe that connects that winds up, 10, anchor ear, 11, circular hole, 12, bolt, 13, steel plate.
Detailed description of the invention
Below in conjunction with test example and detailed description of the invention, the present invention is described in further detail.But this should be interpreted as to the scope of the above-mentioned theme of the present invention only limits to following embodiment, all technology realizing based on content of the present invention all belong to scope of the present invention.
As shown in Fig. 1-7, girder truss integral pushing erection method, comprises the following steps:
The first step, assembled truss girder, connect into entirety by assembled two truss girders that complete (being left width girder, right width girder) by the horizontal even steel pipe 3 of lower edge, the horizontal steel pipe 9 that connects that winds up;
Second step, installation continuous action jack 2, installation work platform 1 on the assembled girder truss horizontal-associate steel pipe completing, working platform 1 both sides are respectively equipped with continuous action jack 2, and hydraulic oil pump and the electromagnetic valve of controlling both sides continuous action jack 2 jacking force are also installed on working platform 1; Continuous action jack 2 can be realized the function that is similar to two jack that are cascaded, i.e. another oil return while carrying out pushing tow, and another pushing tow again while carrying out oil return, so just can realize the continuous pushing tow of girder truss; Continuous action jack 2 is also connected with reaction frame 5, reaction frame 5 is arranged on the horizontal even steel pipe 3 of lower edge, by reaction frame 5, jacking force is passed to girder truss, the stressed meeting of girder truss more evenly, advance more steadily, avoided that directly continuous action jack 2 is arranged on while drawing on girder truss to girder truss discontinuity or stress is concentrated the girder truss local buckling causing;
The 3rd step, installation steel strand, the every side continuous action of working platform 1 jack 2 is inner through there being three steel strand, steel strand one end through continuous action jack 2 front ends is anchored on three bridge piers in girder truss front, the steel strand other end through continuous action jack 2 tail ends naturally droops, and steel strand steel hinge line in passing continuous action jack 2 passes the connecting hole 6 being located on reaction frame 5; Debug afterwards the prestressing force of steel strand; Three steel strand are anchored at respectively on three bridge piers in girder truss front, jacking force are distributed on three piers like this, have reduced the impact of jacking force on pier stud;
The 4th step, girder truss pushing tow, master station sends pushing tow order, the continuous action jack 2 that is arranged on working platform both sides is realized the successively incremeantal launching method to girder truss, another oil return while being a drawing steel stranded wire in continuous action jack 2, thereby reach the continuity of alternately dilatory pushing tow girder truss, if any stopping extremely at any time and carry out stressed detection;
The 5th step, girder truss are crossed pier, under 2 effects of continuous action jack, girder truss pushing tow is crossed pier, and before bridge pier is being crossed in the position at continuous action jack 2 places, change in advance the steel strand anchoring point on bridge pier, make steel strand anchoring point all the time before the girder truss of pushing tow on bridge pier, for pushing tow is again prepared.
Shown in Fig. 5,6, reaction frame can be selected to be made up of two anchor ears 10, two anchor ears 10 are mutually fastening by bolt 12, circular hole 11 radiuses that form and lower edge be horizontal, and to connect steel pipe 3 the same, reaction frame 5 just can be arranged on the horizontal even steel pipe 3 of lower edge like this, connecting hole 6 is located on anchor ear 10 and is mutually vertical with circular hole 11, and connecting hole 6 outsides are welded with steel plate 13, and connection continuous action jack 2 is bolted on steel plate 13.Continuous action jack 2 is in the time of pushing tow truss girder like this, and than directly reaction frame 5 being welded on to (as shown in Figure 7) on truss girder, the distortion that truss girder produces is less, stressed more even, and moving also can be more stable.
Especially, because continuous action jack 2 girder truss when the pushing tow is to move along a straight line, in the time that girder truss carries out pushing tow on small radius circular curve, at this moment on girder truss, before pier, do not aim at bridge pier 7, need to carry out transverse shifting, now be arranged on the horizontal jack on pier stud, can realize and adjust girder truss lateral displacement; Often, in actual mechanical process, reaction frame 5 is fixed in the middle of the spacing steel pin of both sides, slideway front and back, laterally jack, by directly contacting with the tugboat side of pushing tow, is adjusted girder position by traversing tugboat position, thereby is realized the transverse shift of girder.Continuous action jack 2 pushing tow girder trusses vertically move and laterally the traversing girder truss of jack jointly can realize girder truss and move on small radius circular curve.
The stressed detection method of girder truss pushing tow is in the time that the every sections of girder truss starts pushing tow, can adopt and first advance a bit of distance (as 5cm), stop immediately, continuous action jack 2 pine tars are pressed, advance a bit of distance (as 5cm) again, then stop, continuous action jack 2 again pine tar is pressed, for this reason repeatedly twice or thrice, whether all stressed to check girder truss.Continuous action jack 2 is synchronously step by step when afterburning pushing tow girder truss, when girder truss is during in critical condition, keep the jack oil pressure of a certain size power (as 600KN) to stablize motionless, to prevent that truss from the uniform velocity not advancing, then order is afterburning: first adjust all directions synchronously stressed, more synchronous reinforcing step by step.Continuous action jack 2 shift motion of simultaneously having worked, whether synchronously vertically move according to the left width girder of girder truss, right width girder, judge whether to start left width girder continuous action jack 2 respectively or simultaneously, right width girder continuous action jack 2 is adjusted, girder truss body is pushed ahead evenly, realize the synchronous push of each pier.
In above-mentioned girder truss pushing tow process, also need to measure governing factor and mainly comprise girder truss center line and each pier top off normal.Along with the propelling of girder truss, its center line off normal of lateral Displacement control, in effective range, is strictly controlled each jack synchronous push, and the off normal of each Dun Ding is all within designing requirement scope.When truss jacking, the off normal of the each pier of survey crew tracking and monitoring and girder truss position of center line, in the time of girder truss disalignment, utilize lateral Displacement adjustment in time, is then locked; The position of lateral Displacement needs Walk Simulation on computers, and the path of locking girder truss walking, to determine lateral Displacement.Particularly important to the observation of pier top moment off normal in pushing tow process, pier top off normal exceedes design load need stop vertical shift immediately, adjusts girder truss position, meets design requirement with the off normal that ensures each pier.For ensureing the safety of survey crew, guardrail 8 is also installed on working platform.
Above-described embodiment is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a girder truss integral pushing erection method, is characterized in that, comprises the following steps:
The first step, assembled truss girder are that left width girder, right width girder are linked to be overall girder truss by horizontal-associate steel pipe by assembled two truss girders that complete;
Second step, installation continuous action jack (2), installation work platform (1) on the horizontal-associate steel pipe of described girder truss, described working platform (1) both sides are respectively equipped with continuous action jack (2), described in two described continuous action jack (2) difference pushing tow, left width girder, right width girder, be also provided with hydraulic oil pump and the electromagnetic valve of controlling both sides continuous action jack (2) jacking force on described working platform (1);
The 3rd step, installation steel strand, inner through there being at least one steel strand at described continuous action jack (2), described steel strand one end through continuous action jack (2) front end is anchored on the bridge pier in girder truss front, the described steel strand other end through continuous action jack (2) tail end naturally droops, and has debugged the prestressing force of steel strand before pushing tow;
The 4th step, girder truss pushing tow, master station sends pushing tow instruction, the continuous action jack (2) that is arranged on working platform (1) both sides is realized the successively incremeantal launching method to girder truss, another jack oil return while being a jack drawing steel stranded wire in continuous action jack (2), thereby reach the alternately continuity of pushing tow girder truss, if any stopping extremely at any time and carry out stressed detection;
The 5th step, girder truss are crossed pier, under continuous action jack (2) effect, pushing tow girder truss is crossed pier, and the position at continuous action jack (2) place is before crossing bridge pier, change in advance the steel strand anchoring point on bridge pier, make steel strand anchoring point all the time before the girder truss of pushing tow on bridge pier, for pushing tow is again prepared.
2. a kind of girder truss integral pushing erection method according to claim 1, is characterized in that: two described truss girders connect into entirety by the horizontal even steel pipe (3) of lower edge, the horizontal steel pipe (9) that connects that winds up.
3. a kind of girder truss integral pushing erection method according to claim 1, is characterized in that: described continuous action jack (2) is connected with three steel strand, described steel strand are anchored at respectively on three bridge piers in girder truss front.
4. a kind of girder truss integral pushing erection method according to claim 2, it is characterized in that: described continuous action jack (2) is connected with reaction frame (5), described reaction frame (5) is arranged on the horizontal even steel pipe (3) of lower edge.
5. a kind of girder truss integral pushing erection method according to claim 4, is characterized in that: described reaction frame (5) is provided with can be through the connecting hole (6) of steel hinge line.
6. a kind of girder truss integral pushing erection method according to claim 5, it is characterized in that: described reaction frame (5) is for passing through bolt (12) fastening two anchor ears (10) mutually, described two anchor ears (10) form and the horizontal circular hole (11) that even steel pipe (3) radius equates of lower edge, and anchor ear (10) is provided with and the orthogonal connecting hole of circular hole (11) (6), described connecting hole (6) outside is provided with the steel plate (13) that can connect continuous action jack (2).
7. a kind of girder truss integral pushing erection method according to claim 1, is characterized in that: described continuous action jack (2), synchronously step by step when afterburning pushing tow girder truss, is first adjusted all directions synchronously stressed, more synchronous afterburning step by step.
8. according to the arbitrary described a kind of girder truss integral pushing erection method of claim 1-7, it is characterized in that: the pier stud that supports described girder truss is provided with the horizontal jack that can make girder truss transverse shifting, on described horizontal jack, Hydraulic Station is also installed, and is used for controlling the solenoid operated directional valve of oil pressure in permissible range.
9. a kind of girder truss integral pushing erection method according to claim 1, it is characterized in that: described continuous action jack (2) shift motion of simultaneously having worked, whether synchronously vertically move according to the left width girder of girder truss, right width girder, judge whether to start left width girder continuous action jack (2) respectively or simultaneously, right width girder continuous action jack (2) is adjusted, beam body is pushed ahead evenly, realize each pier synchronous push.
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| CN201210272947.9A CN102747691B (en) | 2012-08-02 | 2012-08-02 | Integral pushing erection method for truss girders |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103803450B (en) * | 2012-11-15 | 2016-03-30 | 五冶集团上海有限公司 | The quick method for supporting of a kind of hydraulic lifting |
| CN103696374B (en) * | 2013-12-25 | 2015-10-28 | 中铁大桥勘测设计院集团有限公司 | Horizontal curve section is greatly across freely-supported steel trussed beam cantilever erection method |
| CN104863307B (en) * | 2015-04-28 | 2017-01-11 | 东莞市泰丰钢结构有限公司 | Truss structure |
| CN105672143B (en) * | 2016-01-22 | 2017-03-08 | 广东辰誉电力设计咨询有限公司 | A kind of construction method updating pipeline portal structure |
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Inventor after: Tian Baohua Inventor after: Ju Jianji Inventor after: Xu Renhua Inventor after: Yang Suzhong Inventor after: Zhang Xiaofei Inventor after: Dong Fengjie Inventor after: Zhou Chuanling Inventor after: Jiang Ziqiang Inventor after: Wu Xingyin Inventor after: Fan Jianguo Inventor after: Li Zhiqiang Inventor after: Peng Jian Inventor after: Chen Youlin Inventor after: Yang Yi Inventor after: Liu Yanlong Inventor after: Wang Cen Inventor after: Shen Ruilan Inventor after: Zhou Jianxin Inventor before: Tian Baohua Inventor before: Ju Jianji Inventor before: Xu Renhua Inventor before: Yang Suzhong Inventor before: Zhang Xiaofei Inventor before: Dong Fengjie Inventor before: Zhou Chuanling Inventor before: Fan Jianguo Inventor before: Li Zhiqiang Inventor before: Peng Jian Inventor before: Chen Youlin Inventor before: Yang Yi Inventor before: Liu Yanlong Inventor before: Wang Cen Inventor before: Shen Ruilan Inventor before: Zhou Jianxin |
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Free format text: CORRECT: INVENTOR; FROM: TIAN BAOHUA LI ZHIQIANG PENG JIAN CHEN YOULIN YANG YI LIU YANLONG WANG CENSHEN RUILAN ZHOU JIANXIN JU QIANJI XU RENHUA YANG SUZHONG ZHANG XIAOFEI DONG FENGJIE ZHOU CHUANLING FAN JIANGUO TO: TIAN BAOHUA LI ZHIQIANG PENG JIAN CHEN YOULIN YANG YI LIU YANLONG WANG CEN SHEN RUILAN ZHOU JIANXIN JU QIANJI XU RENHUA YANG SUZHONG ZHANG XIAOFEI DONG FENGJIE ZHOU CHUANLING JIANG ZIQIANG WU XINGYIN FAN JIANGUO |
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