CN102936873A - Contact net line protection system for continuous beam construction of overpass electrified railway - Google Patents
Contact net line protection system for continuous beam construction of overpass electrified railway Download PDFInfo
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- CN102936873A CN102936873A CN2012104759074A CN201210475907A CN102936873A CN 102936873 A CN102936873 A CN 102936873A CN 2012104759074 A CN2012104759074 A CN 2012104759074A CN 201210475907 A CN201210475907 A CN 201210475907A CN 102936873 A CN102936873 A CN 102936873A
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- continuous beam
- shed
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Abstract
The invention discloses a contact net line protection system for the continuous beam construction of an overpass electrified railway. The system is characterized in that a protective shed frame is arranged above the existing railway and composed of shed frame uprights at the two sides for supporting a top shed-frame longitudinal beam, wherein steel shims and square timbers are fully laid on the top shed-frame longitudinal beam to form a cast-in-situ portal; a continuous beam bottom die for the construction of the continuous beam is directly paved on the square timbers; and the joist steel of the shed-frame longitudinal beam is covered with a high-voltage anti-electricity insulating plate at the middle section of the shed-frame longitudinal beam, so that the anti-electricity insulation of the shed-frame longitudinal beam to the high-voltage conductor of the contact net is formed. The contact net line protection system has the following advantages that the protective shed frame is combined with the cast-in-situ portal so that the height occupied by the structure is effectively reduced, so that a good protection effect and a cast-in-situ supporting effect both are achieved.
Description
Technical field
The present invention relates to be applied on the support cast-in-place continuous beams such as newly built railway, speedway across guard system in existing electrified railway contact net construction of prevention work.
Background technology
Along with the railway network is more and more intensive, and majority is electric railway, newly built railway, highway etc. need upper increasing across electrified railway construction, the design continuous beams that adopt are crossed over more, but some is affected by the circuit longitudinal gradient, upper little across headroom, the overpass beam is nearer apart from existing railway 27KV electrical body OCS Messenger Wire, can not ensure effective safe distance.Construct this type of at present across the railway cast-in-place continuous beam, the conventional construction method is is setting up protecting canopy frame across the railway place, by works area and circuit isolation, and then set up across the railway cast-in-place door frame, but this method need take larger headroom, cause protecting canopy frame top longeron apart from OCS Messenger Wire apart from deficiency, apart from 27KV high-tension electricity insulation distance deficiency, if this insulation distance is less than the cast-in-place construction that 1m that railway power supply department requires will cause carrying out continuous beam.
Loop wire engineering Economic Development Zone, Hefei railway terminal south grand bridge is across closing the force downlink railway that detours in the DK470+344 place, and intersecting angle is 26
o, be designed to (32+48+32) m continuous beam, adopt the construction of support cast-in-place method.Closing the force downlink railway that detours is electric railway, current EMUs, and the design speed per hour is 160km/h, is provided with the OCS Messenger Wire of 27KV high pressure.Affected by the circuit longitudinal gradient, at the bottom of continuous beam, the distance high-voltage OCS Messenger Wire is only 1.15m, brought very big difficulty to Construction of continuous beam, also do not had a kind of well for the safety of existing railway high-voltage contact net equipment and the measure of construction operation personnel protection against electric shock in prior art.
Summary of the invention
The present invention is for avoiding the existing weak point of above-mentioned prior art, provide a kind of upper across electric railway Construction of continuous beam contact net lines guard system, for the safety of existing railway high-voltage contact net equipment and the requirement of construction operation personnel protection against electric shock, provide a kind of effective measure in limited space, eliminate the high pressure electrical shock safety hazard of bringing because of the headroom deficiency.
The present invention is that the technical solution problem adopts following technical scheme:
Design feature across electric railway Construction of continuous beam contact net lines guard system in the present invention is:
Protecting canopy frame is set above existing railway, described protecting canopy frame is, in the both sides of existing railway, concrete foundation is set, spaced frame column on the concrete foundation of both sides, the top of described frame column is provided with the frame crossbeam, shelving longeron between the frame crossbeam on the relative position of both sides; Top at the frame longeron completely spreads billet, lays the lumps of wood at the top of described billet and forms cast-in-place door frame, for the continuous beam bed die of constructing continuous beam, is laid immediately on the described lumps of wood;
Described frame longeron adopts i iron, in the stage casing of described frame longeron, be positioned on the base plate and web of i iron, form parcel with the anti-electrical insulating board of high pressure on the surface of i iron, to be coated with the anti-electrical insulating board of high pressure, form the anti-electric insulation of frame longeron to the contact net high-voltage conducting wires;
Be positioned at described protecting canopy frame place section, with insulation sleeve, on described contact net high-voltage conducting wires and OCS Messenger Wire, carry out insulation sleeve.
Design feature across electric railway Construction of continuous beam contact net lines guard system in the present invention also is:
On the frame longeron of described employing i iron, be positioned at spaced each elevator on the top board of i iron, the top of the anti-electrical insulating board of described high pressure is fixedly connected on each elevator by insulated bolt.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention merges protecting canopy frame and cast-in-place door frame, has effectively reduced the shared height of structure, has both played good protective action, has also played cast-in-place supporting role.
2, the present invention is wrapped up the frame longeron with the anti-electrical insulating board of high pressure, and OCS Messenger Wire is carried out to sheath, has effectively increased the insulation distance of protecting canopy frame and high-tension electricity, has ensured existing railway equipment and constructor's safety.
3, the present invention is simple in structure, easy to implement.
The accompanying drawing explanation
Fig. 1 is protecting canopy frame facade structures schematic diagram in the present invention;
Fig. 2 is protecting canopy frame plan structure schematic diagram in the present invention;
Fig. 3 is the protecting canopy frame two side shelf columns schematic diagram of arranging in the present invention;
Fig. 4 is the frame longeron schematic cross-sectional view of wrapping up with the anti-electric insulating slab of high pressure in the present invention;
Fig. 5 is the frame stringer sides TV structure schematic diagram wrapped up with the anti-electric insulating slab of high pressure in the present invention;
Number in the figure: 1 existing railway; 2 concrete foundations; 3 frame columns; 4 frame crossbeams; 5 frame longerons; The 5a billet; 6 high pressure are prevented electrical insulating board; 7 contact net high-voltage conducting wires; 8 OCS Messenger Wires; 9 elevators; 10 insulated bolts; 11 insulation sleeve.
The specific embodiment
Referring to Fig. 1, Fig. 2 and Fig. 3, in the present embodiment, the upper structure across electric railway Construction of continuous beam contact net lines guard system is set to:
Shown in Fig. 1, Fig. 2 and Fig. 3, above existing railway 1, protecting canopy frame is set, protecting canopy frame is, in the both sides of existing railway 1, concrete foundation 2 is set, spaced frame column 3 on both sides concrete foundation 2, the top of frame column 3 is provided with frame crossbeam 4, shelving longeron 5 between the frame crossbeam 4 on the relative position of both sides; Lay billet 5a at the top of frame longeron 5, lay the lumps of wood at the top of billet 5a and form cast-in-place door frame, for the continuous beam bed die of constructing continuous beam, be laid immediately on the lumps of wood;
Be positioned at protecting canopy frame place section, with insulation sleeve 11, on contact net high-voltage conducting wires 7 and OCS Messenger Wire 8, carry out insulation sleeve.
Shown in Fig. 4 and Fig. 5, frame longeron 5 adopts i iron, in the stage casing of frame longeron 5, be positioned on the base plate and web of i iron, form parcel with the anti-electrical insulating board 6 of high pressure on the surface of frame longeron i iron, form the anti-electric insulation of 5 pairs of contact net high-voltage conducting wires 7 of frame longeron to be coated with the anti-electrical insulating board 6 of high pressure; Adopting on the frame longeron 5 of i iron, be positioned at spaced each elevator 9 on the top board of i iron, the top of the anti-electrical insulating board 6 of high pressure is fixedly connected on each elevator 9 by insulated bolt 10.
Work progress:
1, installing insulating sleeve pipe;
Contact net equipment to railway interests's application leap place power supply unit has a power failure, and railway is blocked, and each the power failure blocks 2 hours.Have a power failure after blockade, adopt the anti-electric insulation sleeve of 30KV to carry out sheath the OCS Messenger Wire of leap place 50m scope 8, played certain insulating effect.
2, shelving;
Across the cast-in-place employing portal-framed structure in railway division, because headroom is less, cast-in-place door frame and protecting canopy frame are shared.Frame adopts and sets up along the railway quadrature, and concrete foundation adopts pile foundation 2a in conjunction with concrete fin ellbeam 2b, and every side adopts 20 Φ 1.0m hand excavated piles, hole digging pile degree of depth 9m, and the pile foundation spacing is 2.5m, as shown in Figure 1.
Concrete fin ellbeam 2b is wide is 1m, the high 0.5m of being; The bottom of concrete fin ellbeam 2b is every the PVC gutter of the pre-buried Φ 100mm of 1m, and for construction period curb draining, the top pre-embedded bolt of concrete fin ellbeam 2b, be connected for the bottom with frame column 3.
3, the anti-electrical insulating board of installation high-voltage;
Because the distance of the distance from bottom OCS Messenger Wire 8 of frame longeron 5 be only 0.6m, the insulation distance that can't meet the requirement of railway power supply department is not less than the requirement of 1m.Adopt the anti-6 pairs of 114 frame longerons 5 of electrical insulating board of 30KV high pressure to be wrapped up, for saving few material, can adopt the form of half parcel, the thickness of the anti-electrical insulating board 6 of high pressure is 1cm, and every width is 1m, and length is 2m.The anti-electrical insulating board 6 of high pressure will be positioned at OCS Messenger Wire 8 directly over base plate and the web parcel of frame longeron 5, top is fixedly connected with elevator 9, as shown in Figure 4 and Figure 5.
The anti-electrical insulating board 6 of high pressure is before installation, apart from OCS Messenger Wire 8, nearest electric conductor is that the frame longeron is 0.6m, and after the anti-electrical insulating board 6 of high pressure is installed, this distance increases to 1m, meet the requirement of railway power supply department, also greatly reduced constructor's risk of getting an electric shock.
Claims (2)
1. go up across electric railway Construction of continuous beam contact net lines guard system, it is characterized in that:
Top at existing railway (1) arranges protecting canopy frame, described protecting canopy frame is, in the both sides of existing railway (1), concrete foundation (2) is set, at the upper spaced frame column (3) of both sides concrete foundation (2), the top of described frame column (3) is provided with frame crossbeam (4), shelving longeron (5) between the frame crossbeam (4) on the relative position of both sides; Completely spread billet (5a) at the top of described frame longeron (5), lay the lumps of wood at the top of described billet (5a) and form cast-in-place door frame, for the continuous beam bed die of constructing continuous beam, be laid immediately on the described lumps of wood;
Described frame longeron (5) adopts i iron, in the stage casing of described frame longeron (5), be positioned on the base plate and web of frame longeron i iron, form parcel with the anti-electrical insulating board (6) of high pressure on the surface of i iron, to be coated with the anti-electrical insulating board (6) of high pressure, form the anti-electric insulation of frame longeron (5) to contact net high-voltage conducting wires (7);
Be positioned at described protecting canopy frame place section, with insulation sleeve (11), on described contact net high-voltage conducting wires (7) and OCS Messenger Wire (8), carry out insulation sleeve.
2. according to claim 1 upper across electric railway Construction of continuous beam contact net lines guard system, it is characterized in that:
On the frame longeron (5) of described employing i iron, be positioned at spaced each elevator (9) on the top board of frame longeron i iron, described high pressure prevents that the top of electrical insulating board (6) is fixedly connected on each elevator (9) by insulated bolt (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210475907.4A CN102936873B (en) | 2012-11-21 | 2012-11-21 | On across electric railway Construction of continuous beam contact net lines guard system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210475907.4A CN102936873B (en) | 2012-11-21 | 2012-11-21 | On across electric railway Construction of continuous beam contact net lines guard system |
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| CN102936873A true CN102936873A (en) | 2013-02-20 |
| CN102936873B CN102936873B (en) | 2015-10-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350446A (en) * | 2015-11-11 | 2016-02-24 | 中铁大桥局武汉桥梁特种技术有限公司 | Combined highway and railway bridge isolation shed frame and mounting method of wedge-shaped liners |
| CN106702905A (en) * | 2016-11-30 | 2017-05-24 | 中铁十六局集团第三工程有限公司 | Construction method for hanging type protective scaffolding |
| CN109594485A (en) * | 2019-01-21 | 2019-04-09 | 中铁四局集团第二工程有限公司 | A kind of anti-high slope falling rocks componentization protecting canopy frame structure of highway and its construction method |
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| FR2703703A1 (en) * | 1993-04-06 | 1994-10-14 | Sarl Leduc | Protective device for the construction of bridges over railway tracks electrified by means of catenaries |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350446A (en) * | 2015-11-11 | 2016-02-24 | 中铁大桥局武汉桥梁特种技术有限公司 | Combined highway and railway bridge isolation shed frame and mounting method of wedge-shaped liners |
| CN105350446B (en) * | 2015-11-11 | 2017-02-01 | 中铁大桥局武汉桥梁特种技术有限公司 | Combined highway and railway bridge isolation shed frame and mounting method of wedge-shaped liners |
| CN106702905A (en) * | 2016-11-30 | 2017-05-24 | 中铁十六局集团第三工程有限公司 | Construction method for hanging type protective scaffolding |
| CN109594485A (en) * | 2019-01-21 | 2019-04-09 | 中铁四局集团第二工程有限公司 | A kind of anti-high slope falling rocks componentization protecting canopy frame structure of highway and its construction method |
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| CN102936873B (en) | 2015-10-28 |
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