CN102979041A - Soft overhead reinforcing jacking method for construction of span box bridge of jacking block of underpass turnout group of railway - Google Patents
Soft overhead reinforcing jacking method for construction of span box bridge of jacking block of underpass turnout group of railway Download PDFInfo
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- CN102979041A CN102979041A CN2012105737458A CN201210573745A CN102979041A CN 102979041 A CN102979041 A CN 102979041A CN 2012105737458 A CN2012105737458 A CN 2012105737458A CN 201210573745 A CN201210573745 A CN 201210573745A CN 102979041 A CN102979041 A CN 102979041A
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Abstract
The invention discloses a soft overhead reinforcing jacking method for construction of a span box bridge of a jacking block of an underpass turnout group of a railway. The method comprises the steps of: arranging fulcrum piles symmetrically at both ends of an overhead line; splicing a cross beam and preparing a vertical beam; establishing a soft overhead system of the line in a slow travelling period of a train, and installing a sliding fulcrum assembly of a section of track; jacking a prefabricated box bridge in position by means of an interval when the train passes at a limited velocity; and finally disassembling the cross beam and the vertical beam. The method has the advantage that the cross beam and the dead load of a line device on a hole digging part under the line are mainly burdened by the vertical beam, and the force is transferred to a main fulcrum; when the train passes at the limited velocity, the cross beam on the hole digging part under the line, the dead load of the line device and the dynamic load of the train are mainly borne by the cross beam, and the force is respectively transferred to a box bridge top plate and a roadbed at both ends of the cross beam; and meanwhile, the soft overhead system can be used for large span overhead lines with multiple station tracks in a plane, turnout group in a station yard, curve and oblique crossing and the like.
Description
Technical field
The present invention relates to down wear existing railway case bridge jacking construction method, especially relate to a kind of soft built on stilts reinforcing jacking of lower rail wear track switch group jacking wide-span case bridge construction.
Background technology
Last century 70 and the eighties, the lower built on stilts material of wearing in the existing railway case bridge jacking construction method adopt " low-alloy steel assembled truss beam " more, and (figure number: the part rod member special bridge-0119) and the laggard line of accessory assembly unit road are built on stilts to be reinforced.Because the method used accessory when spelling is many especially, accessory is lost especially severe in the work progress, has caused very large waste.By optimal design, the junction plate of losing easily directly is welded on design attitude afterwards, formed the horizontal beam column spare of lifting, the quantity of greatly having reduced accessory.To the nineties in last century, owing on the existing railway Business Line, increase in a large number and build overpass bridge, overpass bridge not only aperture is large, hole count is many, circuit becomes the oblique state with case bridge center line and build again busy main line in or a multiply road, station, under track switch group or the curve, railway interests also requires must not be lower than 45km/h at the basic up train speed limit of guaranteeing traffic safety simultaneously, use the horizontal beam column spare of lifting of former usefulness according to traditional construction experience, the horizontal case bay of lifting must be reduced in the 400mm, changing the concrete of existing railway pillow into sleeper simultaneously could construct, increased work difficulty, and the built on stilts reinforcing aspect of track switch group circuit does not relate to almost.
Summary of the invention
The object of the present invention is to provide a kind of soft built on stilts reinforcing jacking of safe and reliable lower rail wear track switch group jacking wide-span case bridge construction.
For achieving the above object, the present invention can take following technical proposals:
The soft built on stilts reinforcing jacking of lower rail wear track switch group jacking wide-span case bridge construction of the present invention, it comprises following construction sequence:
The first step, the fulcrum stake is laid
The symmetrical two main fulcrum hole digging pile of row and the secondary fulcrum hole digging piles of laying at the two ends of overhead wire, between main fulcrum hole digging pile, lay the interim fulcrum hole digging pile of two row or multi-row, be provided with anti-back stake corresponding to the overhead wire opposite side for the treatment of the jacking prefabricated case beam, top in anti-back stake offers groove, is placed with the location i iron in the groove;
Second step, the horizontal beam of lifting of assembly unit
Assembly jig is set up in front end and both sides at prefabricated case beam, the horizontal beam of lifting of assembly unit on the top of assembly jig and prefabricated case beam, and the horizontal beam length of lifting that is assembled into satisfies the built on stilts cross section width of circuit;
In the 3rd step, make longeron
I iron is connected into longeron by supramarginal plate, inframarginal and web;
In the 4th step, set up the soft built on stilts system of circuit
During train is gone slowly, longeron is seated in successively on main fulcrum hole digging pile, secondary fulcrum hole digging pile and the interim fulcrum hole digging pile of laying along the circuit direction by one group of twice; Ballast tub under the excavation sleeper passes the horizontal beam of lifting successively the horizontal Cheng Heng in rear interval and lifts beam row from longeron bottom, and horizontal lift beam with hardwood plate supporting rail at the bottom of or at the bottom of the sleeper; Then longeron and the horizontal beam of lifting are connected as a single entity by U bolt, it is fixing that the wood support is set between the track outside and longeron i iron, and horizontal beam, longeron and the circuit lifted is connected as a single entity; The horizontal beam row left side of lifting corresponding to precast box bridge position extends to the front top of precast box bridge, and right-hand member extends on the location i iron of anti-back stake upper end, locks onto on the i iron of location by the U-shaped hang spring;
The 5th step; Section of track sliding fulcrum assembly is installed
Lay two lower sections of track at precast box bridge top board, horizontal lift below the beam with precast box bridge top board on the fixed installation of interval, corresponding section, lower section of track position on the section of track, track contact surface between the upper section of track and the lower section of track is shiny surface, and at the track upper surface coating butter of the lower section of track;
The 6th step, the jacking of precast box bridge
Behind the soft built on stilts Establishing of circuit, the gap after utilizing train speed limit to pass through uses conventional method that the jacking of precast box bridge is in place, successively interim fulcrum hole digging pile is removed in the jack-in process; Prefabricated case beam after in place forms it across overhead wire and supports;
In the 7th step, remove horizontal beam and the longeron lifted
Successively the horizontal beam of lifting is extracted out, disintegrated by root, and timely backfill ballast aggregate, the circuit level adjusted; Remove longeron and disintegration.
The horizontal Liang Paishang of lifting between two longerons is provided with the pressure beam, and described pressure beam is connected mutually by U bolt and the described horizontal beam of lifting.
The invention has the advantages that when carrying out the jacking of case bridge in the gap that train speed limit 45km/h passes through that horizontal under the circuit on the borehole part lifted beam, line facility dead load is mainly undertaken by the longeron i iron, its power passes to main fulcrum stake; Train speed limit by the time, the case bridge stops jacking, horizontal beam, built-in unit dead load and the Train induced load lifted under the circuit on the borehole part be mainly by the horizontal joist support load of lifting, its power passes to respectively on the horizontal case bridge top board and roadbed of lifting the beam two ends; This soft built on stilts system can satisfy multiply road in the isoplanar simultaneously, the large span circuit of the states such as a track switch group, curve and oblique of standing is built on stilts, also is convenient to the fixing of equipment such as semaphore, contact net bar in the track switch group.
Description of drawings
Fig. 1 is the built on stilts model schematic cross-sectional view of reinforcing of track switch group circuit of the present invention.
Fig. 2 is the plan structure schematic diagram of Fig. 1.
The specific embodiment
As shown in Figure 1, 2, the soft built on stilts reinforcing jacking of lower rail wear track switch group jacking wide-span case bridge construction of the present invention, it comprises following construction sequence:
The first step, the fulcrum stake is laid
The symmetrical two main fulcrum hole digging pile 1 of row and the secondary fulcrum hole digging piles 2 of laying at the two ends of overhead wire, between main fulcrum hole digging pile 1, lay the interim fulcrum hole digging pile 3 of two row or multi-row, be provided with anti-back stake 5 corresponding to the overhead wire opposite side for the treatment of jacking prefabricated case beam 4, top in anti-back stake 5 offers groove, is placed with location i iron 6 in the groove;
Second step, the horizontal beam of lifting of assembly unit
Assembly jig is set up in front end and both sides at prefabricated case beam, the horizontal beam 7 of lifting of assembly unit on the top of assembly jig and prefabricated case beam, horizontally lift the back-to-back assembly unit of [3703] rod member that beam 7 is selected the dimensions such as 12 meters, 6 meters, 4 meters, 2 meters, and connecting into design length by high-strength bolt, horizontal beam 7 length of lifting that are assembled into satisfy the built on stilts cross section width of circuit;
In the 3rd step, make longeron
Select 16 meters, 8 meters I100 i iron that supramarginal plate, inframarginal and web are connected into longeron 8 with high-strength bolt;
In the 4th step, set up the soft built on stilts system of circuit
During train is gone slowly, longeron 8 is seated in successively on main fulcrum hole digging pile 1, secondary fulcrum hole digging pile 2 and the interim fulcrum hole digging pile 3 of laying along the circuit direction by one group of twice; Ballast tub under the excavation sleeper passes the horizontal beam 7 of lifting successively the horizontal Cheng Heng in rear interval and lifts beam row from longeron 8 bottoms, and horizontal lift beam with hardwood plate supporting rail at the bottom of or at the bottom of the sleeper; Then longeron 8 and the horizontal beam 7 lifted are connected as a single entity by U bolt, bolt all is with two caps; It is fixing that the wood support is set between the track outside and longeron i iron, and horizontal beam, longeron and the circuit lifted is connected as a single entity; Horizontal beam row (being the again joist row) left side of lifting corresponding to precast box bridge 4 positions extends to precast box bridge 4 front tops, right-hand member extends on the location i iron 6 of anti-back stake 5 upper ends, lock onto on the i iron of location by the U-shaped hang spring, drive circuit when preventing 4 jacking of precast box bridge and move; Horizontal lift beam 7 and longeron 8 and install after, press beam 11 to needing between the line that longeron is not set to install; Press two groups of beam 11 operated by rotary motion, two groups of misconnection are installed, and press beam 11 to be fixed together by U bolt and the horizontal beam 7 of lifting; Semaphore, contact net bar column are temporarily fixed at horizontal lifting on the beam 7;
The 5th step; Section of track sliding fulcrum assembly is installed
Lay two lower sections of track 9 at precast box bridge 4 top boards, horizontal lift below the beam 7 with precast box bridge top board on the fixed installation of interval, corresponding section, the lower section of track 9 position on the section of track 10, track contact surface between the upper section of track 10 and the lower section of track 9 is shiny surface, and at the track upper surface coating butter of the lower section of track 9; The upper and lower section of track is formed by P12 light rail and Plate Welding, the rail level of the upper section of track 10 down, be fixed on U bolt and angle bar and horizontally lift beam 7 times, in precast box bridge 4 jack-in process, the upper section of track 10 is motionless, the lower section of track 9 moves forward with the upper section of track 10 with precast box bridge 4 relative sliding occurs, and load passes to the upper section of track 10 and then passes to the lower section of track 9 by the horizontal beam 7 of lifting;
The 6th step, the jacking of precast box bridge
Behind the soft built on stilts Establishing of circuit, the gap after utilizing train speed limit to pass through uses conventional method that 4 jackings of precast box bridge are in place, successively interim fulcrum hole digging pile 3 is removed in the jack-in process; Prefabricated case beam 4 after in place forms it across overhead wire and supports;
In the 7th step, remove horizontal beam and the longeron lifted
Successively the horizontal beam 7 of lifting is extracted out, disintegrated by root with 16-25t crane, 5t hoist engine and movable pulley, take out a horizontal timely backfill ballast aggregate of beam of lifting, adjust the circuit level, be transitioned on the frame bridge being temporarily fixed at the horizontal contact net bar column of lifting on the beam 7, semaphore moves on to original position; Remove longeron 8 and disintegration; The maintenance circuit is to recovering the train constant speed.
Claims (2)
1. the soft built on stilts reinforcing jacking of a lower rail wear track switch group jacking wide-span case bridge construction, it is characterized in that: it comprises following construction sequence:
The first step, the fulcrum stake is laid
Symmetrical two row's main fulcrum hole digging pile (1) and the secondary fulcrum hole digging piles (2) of laying at the two ends of overhead wire, between main fulcrum hole digging pile (1), lay the interim fulcrum hole digging piles of two row or multi-row (3), be provided with anti-back stake (5) corresponding to the overhead wire opposite side for the treatment of jacking prefabricated case beam (4), top in anti-back stake (5) offers groove, is placed with location i iron (6) in the groove;
Second step, the horizontal beam of lifting of assembly unit
Assembly jig is set up in front end and both sides at prefabricated case beam, the horizontal beam (7) of lifting of assembly unit on the top of assembly jig and prefabricated case beam, and horizontal beam (7) length of lifting that is assembled into satisfies the built on stilts cross section width of circuit;
In the 3rd step, make longeron
I iron is connected into longeron (8) by supramarginal plate, inframarginal and web;
In the 4th step, set up the soft built on stilts system of circuit
During train is gone slowly, longeron (8) is seated in the main fulcrum hole digging pile (1) laid along the circuit direction, secondary fulcrum hole digging pile (2) successively and temporarily on the fulcrum hole digging pile (3) by one group of twice; Ballast tub under the excavation sleeper passes the horizontal beam (7) of lifting successively the horizontal Cheng Heng in rear interval and lifts beam row from longeron (8) bottom, and horizontal lift beam with hardwood plate supporting rail at the bottom of or at the bottom of the sleeper; Then longeron (8) and the horizontal beam (7) of lifting are connected as a single entity by U bolt, it is fixing that the wood support is set between the track outside and longeron i iron, and horizontal beam, longeron and the circuit lifted is connected as a single entity; The horizontal beam row left side of lifting corresponding to precast box bridge (4) position extends to the front top of precast box bridge (4), and right-hand member extends on the location i iron (6) of anti-back stake (5) upper end, locks onto on the i iron of location by the U-shaped hang spring;
The 5th step; Section of track sliding fulcrum assembly is installed
Lay two lower sections of track (9) at precast box bridge (4) top board, at the horizontal upper section of track (10) of interval, the lower section of track (9) corresponding section, position fixed installation of lifting on beam (7) below and the precast box bridge top board, track contact surface between the upper section of track (10) and the lower section of track (9) is shiny surface, and at the track upper surface coating butter of the lower section of track (9);
The 6th step, the jacking of precast box bridge
Behind the soft built on stilts Establishing of circuit, the gap after utilizing train speed limit to pass through uses conventional method that precast box bridge (4) jacking is in place, successively interim fulcrum hole digging pile (3) is removed in the jack-in process; Prefabricated case beam after in place (4) forms it across overhead wire and supports;
In the 7th step, remove horizontal beam and the longeron lifted
Successively the horizontal beam (7) of lifting is extracted out, disintegrated by root, and timely backfill ballast aggregate, the circuit level adjusted; Remove longeron (8) and disintegration.
2. the soft built on stilts reinforcing jacking of lower rail wear track switch group jacking wide-span case bridge construction according to claim 1, it is characterized in that: the horizontal Liang Paishang of lifting between described two longerons (8) is provided with and presses beam (11), and described pressure beam (11) is connected mutually by U bolt and the described horizontal beam (7) of lifting.
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| CN201210573745.8A CN102979041B (en) | 2012-12-26 | 2012-12-26 | Soft overhead reinforcing jacking method for construction of span box bridge of jacking block of underpass turnout group of railway |
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| CN201210573745.8A CN102979041B (en) | 2012-12-26 | 2012-12-26 | Soft overhead reinforcing jacking method for construction of span box bridge of jacking block of underpass turnout group of railway |
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| CN103343511A (en) * | 2013-07-22 | 2013-10-09 | 中铁十六局集团第二工程有限公司 | Method for overhead construction of bridge transverse overhead span line |
| CN103410096A (en) * | 2013-08-15 | 2013-11-27 | 中铁六局集团天津铁路建设有限公司 | Box jacking method for performing correction on deflection end by virtue of jack in oblique crossing jacking process |
| CN104099872A (en) * | 2014-06-30 | 2014-10-15 | 中铁四局集团第四工程有限公司 | Railway-underneath-passed long-span box culvert longitudinal-picking transverse-lifting jacking construction method |
| CN105113423A (en) * | 2015-09-22 | 2015-12-02 | 中铁六局集团有限公司 | Replacement constructing method for bridge sleepers of railway jacked-in frame bridge |
| CN106274556A (en) * | 2016-08-05 | 2017-01-04 | 中铁六局集团天津铁路建设有限公司 | A kind of contact net bar changes shifting method |
| CN106337373A (en) * | 2015-07-13 | 2017-01-18 | 中铁第六勘察设计院集团有限公司 | Construction method for oblique through existing line overhead jacking box culvert and pipe joint structure applying the same |
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| CN108708290A (en) * | 2018-06-27 | 2018-10-26 | 中铁十五局集团第四工程有限公司 | The case crane span structure hollow structure and cast-in-situ construction method of minor radius railway curve unit |
| CN109944123A (en) * | 2019-03-19 | 2019-06-28 | 中建一局集团建设发展有限公司 | A kind of Long Span Railway composite aerial system and its under wear frame jacking method |
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| CN110965486A (en) * | 2019-12-18 | 2020-04-07 | 中铁七局集团郑州工程有限公司 | Method for constructing frame culvert in existing railway hard overhead |
| CN111576111A (en) * | 2020-05-29 | 2020-08-25 | 中铁六局集团有限公司 | Frame bridge jacking railway turnout reinforcement construction method |
| CN112878216A (en) * | 2020-11-30 | 2021-06-01 | 中国十七冶集团有限公司 | Suspension type railway underpass box culvert jacking track reinforcing method |
| CN113699895A (en) * | 2021-09-29 | 2021-11-26 | 西安建筑科技大学 | Construction method for overhead jacking of frame-structured bridge into existing line of multiple tracks |
| CN113718784A (en) * | 2021-09-29 | 2021-11-30 | 西安建筑科技大学 | High-water-level loess stratum multi-track railway composite overhead system and construction method thereof |
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| CN103343511A (en) * | 2013-07-22 | 2013-10-09 | 中铁十六局集团第二工程有限公司 | Method for overhead construction of bridge transverse overhead span line |
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| CN110512474A (en) * | 2019-09-12 | 2019-11-29 | 中铁二局第二工程有限公司 | A kind of railroad track makes somebody a mere figurehead ruggedized construction and method |
| CN110965486A (en) * | 2019-12-18 | 2020-04-07 | 中铁七局集团郑州工程有限公司 | Method for constructing frame culvert in existing railway hard overhead |
| CN111576111A (en) * | 2020-05-29 | 2020-08-25 | 中铁六局集团有限公司 | Frame bridge jacking railway turnout reinforcement construction method |
| CN112878216A (en) * | 2020-11-30 | 2021-06-01 | 中国十七冶集团有限公司 | Suspension type railway underpass box culvert jacking track reinforcing method |
| CN113699895A (en) * | 2021-09-29 | 2021-11-26 | 西安建筑科技大学 | Construction method for overhead jacking of frame-structured bridge into existing line of multiple tracks |
| CN113718784A (en) * | 2021-09-29 | 2021-11-30 | 西安建筑科技大学 | High-water-level loess stratum multi-track railway composite overhead system and construction method thereof |
| CN113699895B (en) * | 2021-09-29 | 2022-07-01 | 西安建筑科技大学 | Construction method for overhead jacking of frame-structured bridge into existing line of multiple tracks |
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