CN101082197A - Construction method for embedded railway traffic engineering guided way - Google Patents
Construction method for embedded railway traffic engineering guided way Download PDFInfo
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- CN101082197A CN101082197A CN 200710057563 CN200710057563A CN101082197A CN 101082197 A CN101082197 A CN 101082197A CN 200710057563 CN200710057563 CN 200710057563 CN 200710057563 A CN200710057563 A CN 200710057563A CN 101082197 A CN101082197 A CN 101082197A
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Abstract
The invention discloses a construction method of the embedded orbit guide rail in the traffic engineering. It aims at providing a method suitable for the Chinese situation, which has simple and practicable construction technology, low cost and high efficiency. It has the following steps: after derusting, the guide rail takes U90 primer treatment on its bottom surface and side. The welding of the guide rail: implement gas pressure welding on the whole line long track and curved track whose curvature radius>200m. Adopt narrow clearance manual arc welding on the points zone and curved track with small curvature radius. Spray and bond primer P21 and pour epoxy resin on both sides of the rail ditch and the guide rail separately. The construction method reduces the difficulty in operation and cost and improves the construction efficiency. It ensures the construction quality and resolves the rail slot welding problem in the points zone effectively by establishing the effective and feasible welding process.
Description
Technical field
The present invention relates to a kind of construction technology of embedded railway traffic engineering.
Background technology
Embedded railway traffic engineering is a kind of brand-new city track traffic engineering, this novel traffic engineering still belongs to the first in China, engineering adopts the guided way and the special turning type track switch of TRANSLOHR system, at present, the embedded railway traffic construction technology is quoted is the construction technology of French LOHRE company and the resin material of international EDILON company.Above-mentioned construction technology is not suitable for the national conditions of China owing to require to possess the construction team and the special-purpose construction equipment of specialty, and domestic construction is restricted, and mainly has following problem:
1. the seamless solder technology of guided way:
At the guided way and the track switch of TRANSLOHR system, the designing requirement long rail string adopts the aluminothermy welding scheme, yet, aluminothermy welding cost height, efficient is low, and the narrow gap welding that is unsuitable for the rail gap of switch area connects.In addition, according to the composition that guided way manufacturer provides, its carbon content is between 0.4-0.6, and manganese content is about 1.2, comprehensive other compositions, and its carbon equivalent is higher, and solderability is relatively poor.Owing to the limitation of welding point form, it is improper that welding procedure is grasped, and very easily produces defectives such as pore, crackle and slag inclusion simultaneously.
2.EDILON the construction technology of Edilon Primer U90WB (U90) has limitation in the series of products:
In the construction of Edilon Primer U90WB, the U90 prime treatment of guided way, requirement is finished in sandblast, transport to and construct before going into groove behind the scene, because after the guided way sandblast, open-air placement still is easy to get rusty, rust cleaning work brings very big difficulty to construction, need sizable manpower of input and material resources to eliminate rust, efficiency of construction is low.
3. the casting mold that provides of method side is very soft, is not easy the demoulding, and difficulty of construction is big.
Summary of the invention
The present invention is in order to overcome weak point of the prior art, a kind of suitable China's actual conditions to be provided, can reduce difficulty of construction, and construction technology is simple, and construction cost is low, the job practices of the embedded railway traffic engineering guided way that efficiency of construction is high.
The present invention is achieved through the following technical solutions:
A kind of job practices of embedded railway traffic engineering guided way is characterized in that, comprises the steps:
(1) the guided way surface is carried out the processing of rust removing of sandblast or ball blast, make the guided way surface roughness reach the Sa2.5 level; And adopt high-pressure blast to carry out dedusting and dry the processing, make the guided way surface reach the requirement of U90 construction; Immediately the U90 prime treatment is carried out in the bottom surface and the side of guided way, the guided way two ends is reserved 20-30cm length and is not brushed U90;
(2) carry out solidifying in 24 hours the scene of transporting at least at U90, arrange rail according to plan, carry out the welding of guided way, wherein all fronts long rail string and radius of curvature being adopted the gas pressure welding connection technology greater than the curved rail of 200m, is that the curved rail of the small curvature radius of 10.5-200m adopts narrow-gap manual electric arc to switch area and radius of curvature; After the welding, normalized treatment is carried out in butt joint place; Afterwards to the guided way coating U90 priming paint of postwelding;
(3) handling and brush the rail support groove bottom pouring epoxy resin of U90 priming paint well, bottom land is carried out levelling, and form insulating layer; Afterwards, put the base plate of insulating pad every the 1-2 meter ampere, making the relative rigid pavement of the end face absolute altitude absolute altitude of guided way is 3 ± 3mm, will weld good guided way afterwards and put into rail support groove, adjusts smooth-going degree, straightness accuracy meets design requirement; And at the biside plate of the corresponding position of sound production insulating pad of the base plate of guided way both sides and insulating pad;
(4) guided way is gone into after the groove adjustment finishes, and is fixed on filling block on two shoulders of the guided way flange of rail with glue;
(5) carry out dedusting and dry the processing on rail support groove and guided way surface, make the surface of rail support groove and guided way meet the construction requirement of P21, spraying and adhesive bonding priming paint P21 respectively in the both sides of rail support groove and guided way;
(6) release agent is sprayed on pouring mould and the plug mould, after dry 60 minutes, mould is installed on the rail head, and the plug mould is installed in two ends, afterwards from the outside injection ring epoxy resins of guided way, treat that epoxy resin flows out from opposite side after, pour into a mould from opposite side again, rail support groove is filled up epoxy resin, treat that epoxy resin cure will water mould after the certain degree of hardness and the plug mould removes, treat to finish after epoxy resin hardens fully the construction of guided way.
Described pouring mould and plug mould adopt chloroprene rubber material.
After the air pressure welding, after welding point cooled to below 500 ℃, normalized treatment was carried out in butt joint place, and air pressure welding back butt joint place normalized treatment technology is: joint is reheated to more than 850 ℃, continue 1-2min, slow then cool to room temperature.
Described narrow-gap manual electric arc comprises the steps:
(1) surfacing: to being carried out surfacing, eliminate defective, reach the quality requirement of welding by weldering guided way end;
(2) preheating before the welding: adopt heater that the flange of rail, the web of the rail and the rail head at guided way two ends are heated, heated perimeter is in distance rail end 100mm-150mm scope, and heating-up temperature is 450 ℃-500 ℃;
(3) after preheating reaches temperature, use guided way welding welding rod special for special that guided way is carried out narrow-gap manual electric arc, welding rod is before use 350-400 ℃ of oven dry 1-2 hour, and be placed on and take on-the-spot the use in the drying box, welding sequence is divided into three phases: the phase I is the bottoming welding, second stage is flange of rail welding, and the phase III is the web of the rail and tread welding, and the phase III is flange of rail cover welding and tread cosmetic welding; Concrete welding procedure is: the striking block is placed on both sides, flange of rail end, carry out the welding of phase I, the electric current of backing welding is 140-160A, at first connects along a face down bonding, and after scarfing cinder, weld opposite side, after backing welding is finished, adopt electric hammer or hand hammer to remove the gred, carry out the flange of rail welding of second stage then, weld from the second layer, welding current is 160-180A, after each road weld seam has welded, welding slag is removed clean; After the flange of rail has welded, immediately web of the rail mould is stuck in the guided way waist, carries out the web of the rail welding of phase III then, welding current is controlled at 220-230A, and welding is carried out continuously, does not carry out scarfing cinder; After having welded web of the rail part, weld tread while hot, tread also adopts the continuous welding method, does not remove the gred in the welding process; After the tread welding finishes, at once weld mold is removed, and adopted the method for continuous welding to carry out the cover welding of the flange of rail and rail head upper surface, welding current is 300-500A, after welding is finished, with the Flame-cutter tool striking stopper portions is cut away at once;
(4) after all welding was finished, normalized treatment was carried out in butt joint, and described normalized treatment is: joint area evenly is heated to 800 ℃, insulation 1-2min, slow then cool to room temperature;
(5) with abrasive machine that the part sanding of flat of rail head weld flush is suitable, vertically polishing along guided way then makes the glacing flatness of welding point reach requirement;
(6) carry out defect detecting test after the guided way narrow gap arc welding joint welding, promptly finish whole welding after qualified; As when finding that there is excessive defect flange of rail commissure, should eliminate defective, weld again.
Described filling block is the triangle foam.
The core diameter that bottoming, the flange of rail, flange of rail capping and tread cover welding are used is 4mm, and the core diameter of the web of the rail, rail head is 5mm.
The present invention has following technique effect:
1. the guided way of job practices all fronts long rail string of the present invention and larger radius of curvature adopts the gas pressure welding connection technology, curved rail district to switch area and part small curvature radius adopts narrow-gap manual electric arc, and by formulating rational narrow-gap manual electric arc welding procedure, reduced operation easier, reduce construction cost, improved efficiency of construction.By formulating effective and feasible welding procedure, guaranteed construction quality, solved the rail gap Welding Problems of switch area effectively.Simultaneously, owing to use the welding rod of different-diameter, under the condition of quality assurance, improved welding efficiency.
2. by to the improvement of U90 sequence of construction, both saved the workload of on-the-spot brushing U90, reduced the probability that guided way gets rusty again, prevented that the guided way large tracts of land from getting rusty, reduced the labour intensity of rust cleaning, and construction quality had been easy to be guaranteed.
3. pouring mould and plug mould adopt chloroprene rubber material, make mould have certain rigidity, ensure carrying out smoothly of the demoulding, have reduced difficulty of construction.
Description of drawings
Fig. 1 is the construction schematic diagram of invention embedded railway traffic engineering guided way.
Among the figure:
1. the epoxy resin that solidifies of guided way 2. insulation spacer base plates 3. filling blocks 4..
The specific embodiment
Below in conjunction with the drawings and specific embodiments to the detailed description of the invention.
The resin material that uses in the job practices of embedded railway traffic engineering guided way of the present invention is the series plastics product of Edilon company, mainly is divided into three parts and forms: Edilon PrimerU90WB, be called for short U90; Edilon Primer21 is called for short P21; Edilon Corkelast To is called for short epoxy resin.Construction process according to embedded railway traffic engineering is applied in three kinds of products on guided way, the rail support groove successively, finally with resin with guided way be locked in concrete road bed on.
The construction schematic diagram of embedded railway traffic engineering guided way of the present invention as shown in Figure 1, this method comprises the steps:
1. the guided way surface is carried out the processing of rust removing of sandblast or ball blast, make the guided way surface roughness reach the Sa2.5 level; And adopt high-pressure blast to carry out dedusting and dry the processing, make the guided way surface reach the requirement of U90 construction; Immediately the U90 prime treatment is carried out in the end face and the side of guided way,, reserve 20-30cm length in the guided way two ends and do not brush U90 for the needs that weld.According to the instructions for use of U90, steel surface best applications temperature 〉=20 ℃, steel surface humidity is less than 8%.When steel surface humidity greater than 8% the time, carry out drying and handle.Construction sequence is as follows:
(1) composition 1 (black) is all poured in the bucket of composition 2;
(2) bucket is clipped between the both feet, connects spiral agitator with power auger then and mix two kinds of compositions, thoroughly stirred one minute;
(3) with spatula scraping bucket wall, unmixing product is scraped off from the bucket wall;
(4) stir one minute once more;
(5) the longest application time of U90 is 1 hour, even it still keeps fluid state, two components mix the U90 of back above 1 hour and will be cancelled.Before the next process construction, allow U90 carry out at least solidifying in 24 hours;
(6) guided way one is sidelong down, brushing flange of rail U90 priming paint is vertically placed guided way then, and what use long handle paint brush was thin as far as possible coats U90 priming paint in guided way web of the rail both sides.
2. carry out solidifying in 24 hours the scene of transporting at least at U90, arrange rail according to plan, carry out the welding of guided way, wherein using the HGJ-pressurize to push away the projection welding trailer to all fronts long rail string and radius of curvature greater than the curved rail of 200m and carry out the air pressure welding, is that the curved rail of the small curvature radius of 10.5-200m adopts narrow-gap manual electric arc to switch area and radius of curvature.After the welding, normalized treatment is carried out in butt joint place.Afterwards to the guided way of postwelding coating U90 priming paint according to the method described above.
Because the inhomogeneous cooling of weld can be in the very big thermal stresses of the inner formation of guided way.Use normalized treatment,, can significantly improve the tensile strength of welding point to eliminate thermal stresses and thinning microstructure.After the air pressure welding, when welding point cools to below 500 ℃, normalized treatment is carried out in butt joint place, and air pressure welding back butt joint place normalized treatment technology is: adopt C
2H
2Flow is 3.01m
3/ h and O
2Flow is 2.7m
3The heater of/h reheats joint to more than 850 ℃, and when 30 ℃ of temperature, this process continues 1-2min approximately.Slow then cool to room temperature.
In order to ensure the quality of welding, described narrow-gap manual electric arc comprises the steps:
(1) surfacing: to being carried out surfacing, eliminate defective, reach the quality requirement of welding by weldering guided way end;
(2) preheating before the welding: adopt heater that the flange of rail, the web of the rail and the rail head at guided way two ends are heated, heated perimeter is in distance rail end 100mm-150mm scope, and heating-up temperature is 450 ℃-500 ℃;
(3) after preheating reaches temperature, heater cuts out, use guided way welding welding rod special for special such as TYD380 guided way welding rod special for special, or the J707 welding rod carries out narrow-gap manual electric arc to guided way, welding rod is divided into the flange of rail welding rod of diameter 4mm and the web of the rail, the rail head welding rod of diameter 5mm.Adopt 5mm diameter welding rod in the continuous welding of the phase III web of the rail, rail head, can improve welding efficiency greatly.These two kinds of welding rods are wanted strict the differentiation in welding process, can not arbitrarily use.Welding rod is before use 350-400 ℃ of oven dry 1-2 hour, and is placed on and takes on-the-spot the use in the drying box.In welding process, welding rod was shelved more than 4 hours, needed oven dry again, preferably put in the baking oven ready access upon use.The striking block is placed on both sides, flange of rail end, guarantees the moulding of the flange of rail end during welding.The striking block is of a size of 10 * 10 * 20, and material adopts mild steel, low-alloy steel all can.Each guided way welding point needs 4 striking link stoppers.Internal combustion arc generator or electric welding machine require to be dc source that the maximum weld electric current is not less than 300A.Arcing time factor is not less than 80% under the 250A.Electrode holders should be prepared two, change another at once when a soldering turret is overheated.The insulated part of electrode holders should be intact, must not be short-circuited with guided way or other non-welding positions during use, and suitable clamping diameter 4mm and 5mm welding rod.The arc welding mould is divided into rail head mould, web of the rail mould and flange of rail mould.The mould of the rail head and the web of the rail can be for one.Mold materials is a red copper, and web of the rail mould is not installed during the welding flange of rail, installation mold when the welding web of the rail.The mould jig is used for fixing web of the rail mould, will assurance during installation and the gap of the web of the rail and rail head.The electrode jig is used for fixing welding ground, electrode is fixed on apart from the rail head position on the about 1m of rail end both sides respectively.Electrode is fixed on and produces the arc blow phenomenon when rail end both sides can effectively prevent to weld the flange of rail.
Welding sequence is divided into three phases: the phase I is the bottoming welding, and second stage is flange of rail welding, and the phase III is the web of the rail and tread welding, and the phase III is flange of rail cover welding and tread cosmetic welding; Concrete welding procedure is: the striking block is placed on both sides, flange of rail end, carry out the welding of phase I, the electric current of backing welding is 140-160A, at first connects along a face down bonding, and after scarfing cinder, weld opposite side, after backing welding is finished, adopt electric hammer or hand hammer to remove the gred, carry out the flange of rail welding of second stage then, weld from the second layer, welding current is 160-180A, after each road weld seam has welded, welding slag is removed clean; After the flange of rail has welded, immediately web of the rail mould is stuck in the guided way waist, carries out the web of the rail welding of phase III then, welding current is controlled at 220-230A, and welding is carried out continuously, does not carry out scarfing cinder; After having welded web of the rail part, weld tread while hot, tread also adopts the continuous welding method, does not remove the gred in the welding process; After the tread welding finishes, at once weld mold is removed, and adopted the method for continuous welding to carry out the cover welding of the flange of rail and rail head upper surface, welding current is 300-500A, after welding is finished, with the Flame-cutter tool striking stopper portions is cut away at once.
(4) after all welding was finished, normalized treatment was carried out in butt joint, and described normalized treatment is: joint area evenly is heated to 800 ℃, insulation 1-2min, slow then cool to room temperature.
(5) with abrasive machine that the part sanding of flat of rail head weld flush is suitable, vertically polishing along guided way then makes the glacing flatness of welding point reach requirement.
(6) carry out defect detecting test after the guided way narrow gap arc welding joint welding, promptly finish whole welding after qualified; As when finding that there is excessive defect flange of rail commissure, should eliminate defective, weld again.
3. the construction of rail support groove can be adopted pre-buried job practices.Afterwards, rail support groove interior finish roller in two sides of groove and the bottom surface thin as far as possible brush U90 priming paint, guarantee not have puddle or thick-layer to form.At the very thin one deck epoxy resin of the rail support groove bottom pouring of handling and brushing U90 priming paint well, be generally 2-3mm afterwards, bottom land is carried out levelling, and form insulating layer.Afterwards, put the base plate of insulating pad every the 1-2 meter ampere, making the relative rigid pavement of the end face absolute altitude absolute altitude of guided way is 3 ± 3mm, to weld good guided way afterwards and put into rail support groove, adjust smooth-going degree, straightness accuracy meets design requirement, and at the biside plate of the corresponding position of sound production insulating pad of the base plate of guided way both sides and insulating pad.
The construction of rail support groove U90 priming paint is according to method side EN206 standard, concrete surface strength is not less than C20/C25 before the construction of U90 priming paint, the newly placed concrete cast is no less than 7 days, adhesion strength＞the 0.9Mpa of concrete surface, in order to obtain the adhesion strength that concrete surface is optimized, concrete surface must guarantee that surface quality is good through handling, mixture, no interleaving agent, pollution-free (as: oil, dust, the grease) of cement-free emulsion layer, nothing sulfuration.Concrete surface U90 serviceability temperature condition is between+10 ℃ to+35 ℃, prevents from directly to contact rainwater.Construction sequence is identical with the construction sequence on guided way surface.
4. guided way is gone into after the groove adjustment finishes, and filling block is fixed on two shoulders of the guided way flange of rail with glue.Filling block is generally the triangle foams, and main effect is the elasticity that increases resin, reduces noise, reduces resin demand.
5. use high-pressure steam engine, dust catcher etc. to carry out dedusting and dry the processing on the rail support groove surface, make the surface use high-pressure blast to carry out dedusting and dry the processing at guided way, make the surface of rail support groove and guided way meet the construction requirement of P21, spraying and adhesive bonding priming paint P21 respectively in the both sides of rail support groove and guided way.The P21 construction requirement is removed loose components, dust and dirt, rail bits and other dirt on guided way surface.The air humidity maximum is no more than 75%, must construct on dry surface (maximal humidity is no more than 4%) under the weather condition of drying, and construction temperature is between+5 ℃ to+35 ℃.
After P21 priming paint construction finishes, a time window is arranged carrying out next process (Edilon Corkelast to cast) construction, determine time interval of two procedures according to the difference of surface temperature, as following table:
| Surface temperature (℃) | Minimum time is poor | Maximum time difference |
| 5～20 | 1 |
3 hours |
| 20～25 | 1/2 |
3 hours |
| 25～35 | 1/2 |
2 hours |
The concrete construction sequence of P21 priming paint is as follows:
(1) barreled P21 is fully shaken before using, the attention operative employee always wears your gloves and safety goggles, breath mask etc.
(2) use the Edilon sprayer out of doors, spray P21, guarantee that the groove top edge is fully covered in the both sides of rail and groove.
6. release agent is sprayed on pouring mould and the plug mould, after dry 60 minutes, mould is installed on the rail head, and the plug mould is installed in two ends, afterwards from the outside injection ring epoxy resins of guided way, treat that epoxy resin flows out from opposite side after, pour into a mould from opposite side again, rail support groove is filled up epoxy resin, and the cast direction is referring among Fig. 1 shown in the arrow.Treat that epoxy resin cure will water mould after the certain degree of hardness and the plug mould removes, treat to finish after epoxy resin hardens fully the construction of guided way.Employed pouring mould and plug mould adopt chloroprene rubber material when pouring epoxy resin, because this material softer hardness is suitable, and the demoulding easily.
Dynamic load can be absorbed owing to have good resiliency characteristics after epoxy resin (Edilon Corkelast To) solidifies,, still these resiliency characteristics can be kept even bear long-time load.
Edilon Corkelast To provides elasticity support and fixing for the embedded tracks system, easy construction, and reached the good result of noise reduction damping.
The service condition of epoxy resin:
(1) be unsuitable for the construction in narrower space, minimum rational Application space width should be greater than 25mm
(2) storage temperature suits more than+20 ℃
(3) before the cast Edilon Corkelast To product, must remove loose parts, dust dirt, oil, foreign material and pollutant.
(4) perfusion temperature be in+5 ℃ to+35 ℃ between, suggestion is more than+20 ℃, the surface requirements of constructing drying avoids directly touching water.
(5) after Edilon Corkelast To carries out the cooperation of two components, there is one to construct effective time (promptly using the life-span) according to mixing temperature, as following table
| Mixing temperature (℃) | Effective storage life (life-span) |
| 5 | 15 minutes |
| 10 | 13 minutes |
| 20 | 10 minutes |
| 35 | 6 minutes |
By above time window oral thermometer as can be seen, in the Edilon Corkelast To work progress, when temperature is high more, Edilon Corkelast To solidifies fast more, need efficiency of operation will be high, speed wants fast, when temperature is low, the cure cycle of resin will prolong.
Concrete construction sequence is as follows:
(1) at first the particle that swims in top layer in the composition 1 is broken, stirred one minute with mixer.
(2) will be in advance the composition 2 of proportioning pour in the packing of composition 1, continue to topple over up to composition 2 and begin following, allow it following 30 seconds, moved two kinds of compositions of mixer mixing one minute with Edilon ediMix 10 types, up to even mixing.
(3) carefully in the rail groove, inject materials mixed.Must inject from the outside of guided way, treat that resin after the opposite side outflow, from the opposite side cast, fills up resin with the rail groove again.
In the work progress of U90, P21 and Edilon Corkelast To, must carry out in strict accordance with the using method of manual.
Claims (6)
1, a kind of job practices of embedded railway traffic engineering guided way is characterized in that, comprises the steps:
(1) the guided way surface is carried out the processing of rust removing of sandblast or ball blast, make the guided way surface roughness reach the Sa2.5 level; And adopt high-pressure blast to carry out dedusting and dry the processing, make the guided way surface reach the requirement of U90 construction; Immediately the U90 prime treatment is carried out in the bottom surface and the side of guided way, the guided way two ends is reserved 20-30cm length and is not brushed U90;
(2) carry out solidifying in 24 hours the scene of transporting at least at U90, arrange rail according to plan, carry out the welding of guided way, wherein all fronts long rail string and radius of curvature being adopted the gas pressure welding connection technology greater than the curved rail of 200m, is that the curved rail of the small curvature radius of 10.5-200m adopts narrow-gap manual electric arc to switch area and radius of curvature; After the welding, normalized treatment is carried out in butt joint place; Afterwards to the guided way coating U90 priming paint of postwelding;
(3) handling and brush the rail support groove bottom pouring epoxy resin of U90 priming paint well, bottom land is carried out levelling, and form insulating layer; Afterwards, put the base plate of insulating pad every the 1-2 meter ampere, making the relative rigid pavement of the end face absolute altitude absolute altitude of guided way is 3 ± 3mm, will weld good guided way afterwards and put into rail support groove, adjusts smooth-going degree, straightness accuracy meets design requirement; And at the biside plate of the corresponding position of sound production insulating pad of the base plate of guided way both sides and insulating pad;
(4) guided way is gone into after the groove adjustment finishes, and is fixed on filling block on two shoulders of the guided way flange of rail with glue;
(5) carry out dedusting and dry the processing on rail support groove and guided way surface, make the surface of rail support groove and guided way meet the construction requirement of P21, spraying and adhesive bonding priming paint P21 respectively in the both sides of rail support groove and guided way;
(6) release agent is sprayed on pouring mould and the plug mould, after dry 60 minutes, mould is installed on the rail head, and the plug mould is installed in two ends, afterwards from the outside injection ring epoxy resins of guided way, treat that epoxy resin flows out from opposite side after, pour into a mould from opposite side again, rail support groove is filled up epoxy resin, treat that epoxy resin cure will water mould after the certain degree of hardness and the plug mould removes, treat to finish after epoxy resin hardens fully the construction of guided way.
2, the job practices of embedded railway traffic engineering guided way according to claim 1 is characterized in that, described pouring mould and plug mould adopt chloroprene rubber material.
3, the job practices of embedded railway traffic engineering guided way according to claim 1, it is characterized in that, after the air pressure welding, after welding point cools to below 500 ℃, normalized treatment is carried out in butt joint place, air pressure welding back butt joint place normalized treatment technology is: joint is reheated to more than 850 ℃, continue 1-2min, slow then cool to room temperature.
4, the job practices of embedded railway traffic engineering guided way according to claim 1 is characterized in that, described narrow-gap manual electric arc comprises the steps:
(1) surfacing: to being carried out surfacing, eliminate defective, reach the quality requirement of welding by weldering guided way end;
(2) preheating before the welding: adopt heater that the flange of rail, the web of the rail and the rail head at guided way two ends are heated, heated perimeter is in distance rail end 100mm-150mm scope, and heating-up temperature is 450 ℃-500 ℃;
(3) after preheating reaches temperature, use guided way welding welding rod special for special that guided way is carried out narrow-gap manual electric arc, welding rod is before use 350-400 ℃ of oven dry 1-2 hour, and be placed on and take on-the-spot the use in the drying box, welding sequence is divided into three phases: the phase I is the bottoming welding, second stage is flange of rail welding, and the phase III is the web of the rail and tread welding, and the phase III is flange of rail cover welding and tread cosmetic welding; Concrete welding procedure is: the striking block is placed on both sides, flange of rail end, carry out the welding of phase I, the electric current of backing welding is 140-160A, at first connects along a face down bonding, and after scarfing cinder, weld opposite side, after backing welding is finished, adopt electric hammer or hand hammer to remove the gred, carry out the flange of rail welding of second stage then, weld from the second layer, welding current is 160-180A, after each road weld seam has welded, welding slag is removed clean; After the flange of rail has welded, immediately web of the rail mould is stuck in the guided way waist, carries out the web of the rail welding of phase III then, welding current is controlled at 220-230A, and welding is carried out continuously, does not carry out scarfing cinder; After having welded web of the rail part, weld tread while hot, tread also adopts the continuous welding method, does not remove the gred in the welding process; After the tread welding finishes, at once weld mold is removed, and adopted the method for continuous welding to carry out the cover welding of the flange of rail and rail head upper surface, welding current is 300-500A, after welding is finished, with the Flame-cutter tool striking stopper portions is cut away at once;
(4) after all welding was finished, normalized treatment was carried out in butt joint, and described normalized treatment is: joint area evenly is heated to 800 ℃, insulation 1-2min, slow then cool to room temperature;
(5) with abrasive machine that the part sanding of flat of rail head weld flush is suitable, vertically polishing along guided way then makes the glacing flatness of welding point reach requirement;
(6) carry out defect detecting test after the guided way narrow gap arc welding joint welding, promptly finish whole welding after qualified; As when finding that there is excessive defect flange of rail commissure, should eliminate defective, weld again.
5, the job practices of embedded railway traffic engineering guided way according to claim 1 is characterized in that, described filling block is the triangle foam.
6, the job practices of embedded railway traffic engineering guided way according to claim 1 is characterized in that, the core diameter that bottoming, the flange of rail, flange of rail capping and tread cover welding are used is 4mm, and the core diameter of the web of the rail, rail head is 5mm.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864732A (en) * | 2010-05-26 | 2010-10-20 | 中铁大桥局集团第一工程有限公司 | High-precision surface evening method for large-sized high-bearing capability steel structure slideways |
| CN103352401A (en) * | 2013-07-24 | 2013-10-16 | 成都市新筑路桥机械股份有限公司 | Embedded type track |
| CN103362036A (en) * | 2013-07-24 | 2013-10-23 | 成都市新筑路桥机械股份有限公司 | Quick construction method of embedded rail system |
| CN104532690A (en) * | 2014-12-18 | 2015-04-22 | 成都市新筑路桥机械股份有限公司 | Method for prefabricating and constructing separated rail structure |
| CN106320106A (en) * | 2016-08-24 | 2017-01-11 | 成都市新筑路桥机械股份有限公司 | Seamless track locking construction method of embedded type continuous supporting ballastless track system |
| CN107190594A (en) * | 2017-07-19 | 2017-09-22 | 中铁四局集团有限公司 | Construction method of rubber wheel rail guide rail |
| CN108049260A (en) * | 2017-12-15 | 2018-05-18 | 上海工程技术大学 | A kind of fill-type adjusts backing plate |
| CN108221517A (en) * | 2016-12-22 | 2018-06-29 | 上海工程技术大学 | For the profiling positioning device of fixed intermediate frequency sensing heating normalizing transformer |
| WO2019115826A1 (en) * | 2017-12-15 | 2019-06-20 | Embedded Rail Technology Limited | Rail junction assembly |
| RU2710581C1 (en) * | 2019-04-30 | 2019-12-27 | Закрытое акционерное общество "КПМ-СЕРВИС" | Rail crossing plate device |
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2007
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864732A (en) * | 2010-05-26 | 2010-10-20 | 中铁大桥局集团第一工程有限公司 | High-precision surface evening method for large-sized high-bearing capability steel structure slideways |
| CN103352401A (en) * | 2013-07-24 | 2013-10-16 | 成都市新筑路桥机械股份有限公司 | Embedded type track |
| CN103362036A (en) * | 2013-07-24 | 2013-10-23 | 成都市新筑路桥机械股份有限公司 | Quick construction method of embedded rail system |
| CN103362036B (en) * | 2013-07-24 | 2014-10-22 | 成都市新筑路桥机械股份有限公司 | Quick construction method of embedded rail system |
| CN103352401B (en) * | 2013-07-24 | 2015-01-07 | 成都市新筑路桥机械股份有限公司 | Embedded type track |
| CN104532690A (en) * | 2014-12-18 | 2015-04-22 | 成都市新筑路桥机械股份有限公司 | Method for prefabricating and constructing separated rail structure |
| CN104532690B (en) * | 2014-12-18 | 2016-06-29 | 成都市新筑路桥机械股份有限公司 | Separate type track structure is prefabricated and construction method |
| CN106320106A (en) * | 2016-08-24 | 2017-01-11 | 成都市新筑路桥机械股份有限公司 | Seamless track locking construction method of embedded type continuous supporting ballastless track system |
| CN108221517A (en) * | 2016-12-22 | 2018-06-29 | 上海工程技术大学 | For the profiling positioning device of fixed intermediate frequency sensing heating normalizing transformer |
| CN108221517B (en) * | 2016-12-22 | 2023-10-20 | 上海工程技术大学 | Profiling positioning device for fixing medium-frequency induction heating normalizing transformer |
| CN107190594A (en) * | 2017-07-19 | 2017-09-22 | 中铁四局集团有限公司 | Construction method of rubber wheel rail guide rail |
| CN107190594B (en) * | 2017-07-19 | 2019-02-15 | 中铁四局集团有限公司 | Construction method of rubber wheel rail guide rail |
| WO2019115826A1 (en) * | 2017-12-15 | 2019-06-20 | Embedded Rail Technology Limited | Rail junction assembly |
| CN108049260A (en) * | 2017-12-15 | 2018-05-18 | 上海工程技术大学 | A kind of fill-type adjusts backing plate |
| CN108049260B (en) * | 2017-12-15 | 2024-04-26 | 上海工程技术大学 | Filling type adjusting base plate |
| RU2710581C1 (en) * | 2019-04-30 | 2019-12-27 | Закрытое акционерное общество "КПМ-СЕРВИС" | Rail crossing plate device |
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