CN105275251A - Railway existing line overhead line system hard crossbeam erection method - Google Patents
Railway existing line overhead line system hard crossbeam erection method Download PDFInfo
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- CN105275251A CN105275251A CN201410839862.3A CN201410839862A CN105275251A CN 105275251 A CN105275251 A CN 105275251A CN 201410839862 A CN201410839862 A CN 201410839862A CN 105275251 A CN105275251 A CN 105275251A
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Abstract
The invention discloses a railway existing line overhead line system hard crossbeam erection method, and relates to the railway construction equipment field; the method comprises the following steps: 1, cleaning a basic surface; 2, preparing a steel column assembly; 3, adjusting steel column mounting positions; 4, assembling crossbeam; 5, analyzing hoisting crossbeam conditions; 6, hoisting crossbeam; 7, rectifying; 8, cleaning field. The railway existing line overhead line system hard crossbeam erection method is simple, convenient and practical, can satisfy present track transport construction needs, is suitable for fast developing railway netting twine erection, thus accelerating railway erection speed; people can more conveniently travel, and transport is more convenient.
Description
Technical field
The present invention relates to railway construction apparatus field, particularly a kind of hard beam erection method of Existing Railway Line contact net.
Background technology
Contact net is in electric railway, sets up, get the high voltage transmission line of stream for pantograph along rail overhead "the" shape.Contact net is the main truss of railway electrification project, is the transmission line of electricity of the special shape of powering to electric locomotive of downline overhead erection.It is made up of a few part in contact suspension, supportive device, positioner, pillar and basis.Contact net mainly comprises following several contents: 1. basic component, as cement pillar, steel column and the basis supporting these works; 2. basic mounting structure, the effect of this content mainly connects contact line conducting wire and basic component; 3. contact line conducting wire, this part effect is exactly that transmission current is to electric locomotive; 4. other auxiliary parts, comprise return wire, additional suspension etc.Contact net, rail and the earth, return wire are referred to as Traction networks.
Contact net is the transmission line of electricity of the special shape of powering to electric locomotive of downline overhead erection.It is made up of a few part in contact suspension, supportive device, positioner, pillar and basis.
Contact suspension comprises contact wire, dropper, carrier cable and union piece and insulator.Contact suspension is erected on pillar by supportive device, and its function is that the electric energy obtained from traction substation is flowed to electric locomotive.
Its load in order to support contact suspension, and is passed to pillar or other building by supportive device.According between contact net location, stand field and building and different.Supportive device comprises bracket, girt, suspension insulator string, the special support equipment of rod insulator and other building.Positioner comprises positioning pipe and locator, and its function is the position of fixing contact wire, makes contact wire within the scope of pantograph pan running orbit, ensures that contact wire and pantograph do not depart from, and the level load of contact wire is passed to pillar.
Pillar and basis in order to bear whole loads of contact suspension, support and positioner, and on position contact suspension being fixed on regulation and height.Adopt prestressed reinforced concrete pillar and steel column in China's contact net, basis is for steel strut, and namely steel strut is fixed on the basis that steel concrete below makes, and bears whole loads that pillar passes to, and ensure the stability of pillar by basis.An entirety is made on prestressed reinforced concrete pillar and basis, and underground is directly imbedded in lower end.
Hard crossbeam is the basic component of electric railway station field suspension strut contact net.Often organize hard crossbeam to be made up of two steel columns and one group of crossbeam.Be only applicable to the construction of some special field, electrification station in the past.In the lifting of railway speed increase and safety requirements in recent years, the electrification construction of the field, station, all stations that range of application expands gradually.Hard crossbeam single hole span maximum at present can reach 52 meters, connects that span is maximum reaches 72 meters.The basic component of electric railway station field suspension strut contact net.Often organize hard crossbeam to be made up of two steel columns and one group of crossbeam.Be only applicable to the construction of some special field, electrification station in the past.In the lifting of railway speed increase and safety requirements in recent years, the electrification construction of the field, station, all stations that range of application expands gradually.Hard crossbeam single hole span maximum at present can reach 52 meters, connects that span is maximum reaches 72 meters.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency existing in prior art, provide a kind of Existing Railway Line contact net hard beam erection method.
In order to realize foregoing invention object, the invention provides following technical scheme: a kind of hard beam erection method of Existing Railway Line contact net, comprises the following steps:
The first step: cleaning base surface:
The steel-column foundation face preparing to install is cleaned out; Foundation bolt screw thread coating butter, gets all the nut, pad ready;
Second step: prepare steel column assembly:
(1), in the point of skylight: with installation train, steel column is transported to scene, steel column winches to by stanchion base by second hand rail road crane or mobile crane from peace row flat car; Utilize installation train that steel column is transported to scene in the point of skylight, pillar is winched to stanchion base side by second hand rail road crane or mobile crane from peace row flat car.Wherein the Guilin outer hard crossbeam steel column of platform that stands for a moment must utilize installation train that ten of one platform steel columns are transported to 3 roads in the point of skylight, pillar winches on a platform by second hand rail road crane from peace row flat car, then manually utilizes gun carriage steel column to be transported to corresponding stanchion base side.
(2), outside the point of skylight: carry out group with a 25T mobile crane outside a platform the North awning and stand, carry out group with a 25T mobile crane in road frame bridge Xia Fu road and stand; Wherein Guilin stand for a moment platform hard crossbeam pillar 61# prop up major gene landform restriction, can only utilize a 25T mobile crane outside a platform the North awning, carry out group to stand, station, Guilin 65#, 69#, 73#, 77#, 81#, 85#, 89#, 93# steel column utilizes a 8T mobile crane on a platform, carry out group and stands.(platform is established protection personnel 2, in job area, draws warning rope to protect).Wherein station, Guilin 97# pillar utilizes a 25T mobile crane to carry out group vertical (protection personnel one is respectively established at two ends, auxiliary road, draws warning rope to protect in job area) in upper sea route frame bridge Xia Fu road.
(3), by vertical rod crane drive infield into, contraposition, come to a complete stop, beat supporting leg;
3rd step: steel column installation site adjusts:
(1), after steel column slings, coordinated by vertical rod personnel and hold up, push away, steel column is tilted, then by the bolt on steel column base apertures bit alignment base surface;
(2), all enter behind steel column base apertures position until foundation bolt, steel column lifting is vertically placed on base surface;
(3), at every root bolt a pad and nut are all installed, after by nut screwing clamping;
(4), vertical rod crane is withdrawn scene;
4th step: crossbeam is assembled:
(1), by each for crossbeam fragmented transport to on-the-spot; Because whole group of crossbeam length is long, can not whole spelling install rear transport (cannot sharp radius curve be passed through) can only by crossbeam fragmented transport to assembled after on-the-spot.
(2), it is fixed on bolt by nut by the crossbeam end face of each segmentation down;
(3), turning beam to end face upward;
(4), at crossbeam two ends crossbeam paves by chock, makes in the middle of crossbeam unsettled;
(5), reserved amount of deflection is measured with level gauge, invar tape;
(6), reserved amount of deflection is not when meeting designing requirement, adjusts with pad;
(7), connection residue bolt is installed;
(8), in crossbeam both ends of the surface, hard crossbeam group number is indicated;
5th step: lifting cross beam performance analysis:
Our maximum Lifting Capacity of gantry crane is 18 tons, three joint arms, the most long-armed exhibition is 18.6 meters, minimum operating angle >=30 ° of arm, when gantry crane enter job site in place after, existing two kinds of operating modes when being 30 meters of crossbeams (crossbeam weight is 2.75 tons) to lifting length are analyzed: (each alphabetical implication: H is the height of arm end to cross rail top, and L is the spread length of arm, L1 is the distance of arm to awning edge, and a is the angle of arm)
(1), when H=3.5 rice, L=13.7 rice, L1=2.8 rice, a=52 °;
(2), when H=5.5 rice, L=15.3 rice, L1=3.4 rice, a=57 °;
Analyze through above, our gantry crane lifting cross beam can meet construction needs;
6th step: lifting cross beam:
(1), at the two ends of crossbeam respectively bind two rolling ropes, install Special hoisting belt (steel wire cover), after guaranteeing crossbeam lifting, keep balance;
(2), install train I road come to a complete stop in place after, the supporting leg of a platform side gantry crane is all stretched out, firmly props up and stand on reliable ground, topple when preventing crane from carrying.Then gantry crane starts to carry out lifting operation, first from peace row flat car, hard crossbeam is winched to I road and 3 line-to-line ground, road with gantry crane and assembles; Assemble the rear hard crossbeam utilizing the 18T gantry crane on peace row to assemble, sling slowly in fair line road, when height is to 8.8 meters, one platform end is held and is shaken 4 people of rope and utilize staircase to climb up a platform awning ceiling to hold with 2 platform ends and shake 4 people restricted and coordinate, the personnel holding rolling rope control turning to of crossbeam by slowly pulling rolling rope, make hard crossbeam transfer horizontal path to by fair line road, and about preventing crossbeam, swing up and down excessive; Hoistman now slowly swings arm toward a platform direction, and make beam vertical in circuit and the just state in overhead between two steel columns, the rise that hangs of crossbeam is that crossbeam lower chord exceedes capital 200 ~ 300mm;
(3), every root pillar arranges 2 people to utilize climbers to climb on pillar correct position;
(4), contraposition: crossbeam declines slowly, draw rolling rope personnel to coordinate and pull rolling rope, the flange of crossbeam one end and pillar flange disk center is first made to align, on bar, rolling rope is penetrated bolt and after installing nut additional by operating personnel, and the drawing of the other end is shaken rope personnel and coordinated the flange of the crossbeam other end and pillar flange disk center are aligned, and on bar, operating personnel penetrates bolt and after installing nut additional, two ends pillar operating personnel fastening bolt, until bolt all fastening reach moment values after, crane Zhai Hook, reset;
7th step: just whole:
(1), slope measurement instrument is installed on the side of steel column cross line;
(2), according to the inclination of line pendant; Loose nut, increases or reduces each spiral shell angle pad, be adjusted to steel column cross line direction upright;
(3), gradient qualified after, by nut screwing clamping;
(4), slope measurement instrument is placed in steel column along on the side of line direction;
(5), by the method for step 2 steel column gradient is adjusted, to reaching standard, then clamp nut.
(6), site clearing, carry out civilized construction.Fill in construction note;
The whole positive technical standard of 7th step:
1) quality examination should be carried out according to acceptance criteria after reaching the spot;
2) steel column and beam surface paint or zinc coat should intact non-corrodings, and weld does not have crack;
3) steel column stressed after oblique standard count from base surface; Cross line direction should be upright; Along line direction except anchor post Wai Ying center is upright; Allowable variation 0.3 ﹪;
4) adjust the steel plate washer that the gradient application thin and thick of steel column is different, every sheet pad area is not less than 50 × 100mm, and under each angle, pad quantity must not more than 2, and pad should be placed on below leading role's steel; Answer diagonal angle to circulate during clamp nut to carry out, make uniform force;
5) often organizing the hard crossbeam pillar line of centres should perpendicular to station main track, and deflection should not be greater than 2;
6) according to crossbeam numbering, crossbeam is assembled into entirety by smooth ground.Standard torque spanner should be adopted during crossbeam assembling.The installation Tightening moment of M20 connecting bolt is 280N.M.
7) crossbeam is after the assembling of ground, pads with chock or falsework, the chord member of crossbeam should do not made to bear the gravity of crossbeam below crossbeam;
8) each section of beam should be closely connected after connecting, and adjusting pad thick is 3 ~ 5mm, and area is identical with crossbeam angle steel;
9) crossbeam has certain reserved amount of deflection after having assembled, and reserved amount of deflection is for being less than or equal to 1/200;
10) when lifting cross beam, as according to wire rope, then the outside of wire rope should put protection tube, in case the crossbeam zinc coat that frays, lifting should adopt two, forbids single lifting; Hanging belt (wire rope) position should be installed rationally, is the level of state when ensureing that crossbeam is sling;
8th step: site clearing.
Compared with prior art, the beneficial effect of a kind of Existing Railway Line of the present invention contact net hard beam erection method: the method is simple, convenient and practical, meet the construction of track traffic now demand, the railway network coil holder being applicable to develop rapidly is established, accelerate the speed of railway erection, make the trip of people more convenient and swift, make traffic more convenient.
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 that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment, all technology realized based on content of the present invention all belong to scope of the present invention.
Embodiment 1
A kind of hard beam erection method of Existing Railway Line contact net, comprises the following steps: the first step: cleaning base surface: cleaned out in the steel-column foundation face preparing to install, foundation bolt screw thread coating butter, gets all the nut, pad ready, second step: prepare steel column assembly: in (1), skylight point: steel column is transported to scene with installation train, steel column winches to by stanchion base by second hand rail road crane or mobile crane from peace row flat car, (2), outside the point of skylight: carry out group with a 25T mobile crane outside a platform the North awning and stand, carry out group with a 25T mobile crane in road frame bridge Xia Fu road and stand, (3), by vertical rod crane drive infield into, contraposition, come to a complete stop, beat supporting leg, 3rd step: steel column installation site adjusts: after slinging in (1), steel column, is held up by vertical rod personnel cooperation, is pushed away, steel column is tilted, then by the bolt on steel column base apertures bit alignment base surface, (2), all enter behind steel column base apertures position until foundation bolt, steel column lifting is vertically placed on base surface, (3), at every root bolt a pad and nut are all installed, after by nut screwing clamping, (4), vertical rod crane is withdrawn scene, 4th step: crossbeam assemble: (1), by each for crossbeam fragmented transport to scene, (2), it is fixed on bolt by nut by the crossbeam end face of each segmentation down, (3), turning beam to end face upward, (4), at crossbeam two ends crossbeam paves by chock, makes in the middle of crossbeam unsettled, (5), reserved amount of deflection is measured with level gauge, invar tape, (6), reserved amount of deflection is not when meeting designing requirement, adjusts with pad, (7), connection residue bolt is installed, (8), in crossbeam both ends of the surface, hard crossbeam group number is indicated, 5th step: lifting cross beam performance analysis: our maximum Lifting Capacity of gantry crane is 18 tons, three joint arms, the most long-armed exhibition is 18.6 meters, minimum operating angle >=30 ° of arm, when gantry crane enter job site in place after, two kinds of operating modes when being now 30 meters of crossbeams (crossbeam weight is 2.75 tons) to lifting length are analyzed: (each alphabetical implication: H is the height of arm end to cross rail top, L is the spread length of arm, L1 is the distance of arm to awning edge, a is the angle of arm) (1), when H=3.5 rice, L=13.7 rice, L1=2.8 rice, a=52 °, (2), when H=5.5 rice, L=15.3 rice, L1=3.4 rice, a=57 °, 6th step: lifting cross beam: (1), respectively to bind two shake rope at the two ends of crossbeam, installs Special hoisting belt (steel wire cover), keeps balance after guaranteeing crossbeam lifting, (2), install train I road come to a complete stop in place after, the supporting leg of a platform side gantry crane is all stretched out, firmly props up and stand on reliable ground, topple when preventing crane from carrying.Then gantry crane starts to carry out lifting operation, first from peace row flat car, hard crossbeam is winched to I road and 3 line-to-line ground, road with gantry crane and assembles; Assemble the rear hard crossbeam utilizing the 18T gantry crane on peace row to assemble, sling slowly in fair line road, when height is to 8.8 meters, one platform end is held and is shaken 4 people of rope and utilize staircase to climb up a platform awning ceiling to hold with 2 platform ends and shake 4 people restricted and coordinate, the personnel holding rolling rope control turning to of crossbeam by slowly pulling rolling rope, make hard crossbeam transfer horizontal path to by fair line road, and about preventing crossbeam, swing up and down excessive; Hoistman now slowly swings arm toward a platform direction, and make beam vertical in circuit and the just state in overhead between two steel columns, the rise that hangs of crossbeam is that crossbeam lower chord exceedes capital 200 ~ 300mm; (3), every root pillar arranges 2 people to utilize climbers to climb on pillar correct position; (4), contraposition: crossbeam declines slowly, draw rolling rope personnel to coordinate and pull rolling rope, the flange of crossbeam one end and pillar flange disk center is first made to align, on bar, rolling rope is penetrated bolt and after installing nut additional by operating personnel, and the drawing of the other end is shaken rope personnel and coordinated the flange of the crossbeam other end and pillar flange disk center are aligned, and on bar, operating personnel penetrates bolt and after installing nut additional, two ends pillar operating personnel fastening bolt, until bolt all fastening reach moment values after, crane Zhai Hook, reset; 7th step: just whole: (1), slope measurement instrument is installed on the side of steel column cross line; (2), according to the inclination of line pendant; Loose nut, increases or reduces each spiral shell angle pad, be adjusted to steel column cross line direction upright; (3), gradient qualified after, by nut screwing clamping; (4), slope measurement instrument is placed in steel column along on the side of line direction; (5), by the method for step 2 steel column gradient is adjusted, to reaching standard, then clamp nut; (6), site clearing, carry out civilized construction.Fill in construction note; 8th step: site clearing.
Embodiment 2
A kind of hard beam erection method of Existing Railway Line contact net, comprises the following steps: the first step: cleaning base surface: cleaned out in the steel-column foundation face preparing to install, foundation bolt screw thread coating butter, gets all the nut, pad ready, second step: prepare steel column assembly: in (1), skylight point: steel column is transported to scene with installation train, steel column winches to by stanchion base by second hand rail road crane or mobile crane from peace row flat car, (2), outside the point of skylight: carry out group with a 25T mobile crane outside a platform the North awning and stand, carry out group with a 25T mobile crane in road frame bridge Xia Fu road and stand, (3), by vertical rod crane drive infield into, contraposition, come to a complete stop, beat supporting leg, 3rd step: steel column installation site adjusts: after slinging in (1), steel column, is held up by vertical rod personnel cooperation, is pushed away, steel column is tilted, then by the bolt on steel column base apertures bit alignment base surface, (2), all enter behind steel column base apertures position until foundation bolt, steel column lifting is vertically placed on base surface, (3), at every root bolt a pad and nut are all installed, after by nut screwing clamping, (4), vertical rod crane is withdrawn scene, 4th step: crossbeam assemble: (1), by each for crossbeam fragmented transport to scene, (2), it is fixed on bolt by nut by the crossbeam end face of each segmentation down, (3), turning beam to end face upward, (4), at crossbeam two ends crossbeam paves by chock, makes in the middle of crossbeam unsettled, (5), reserved amount of deflection is measured with level gauge, invar tape, (6), reserved amount of deflection is not when meeting designing requirement, adjusts with pad, (7), connection residue bolt is installed, (8), in crossbeam both ends of the surface, hard crossbeam group number is indicated, 5th step: lifting cross beam performance analysis: our maximum Lifting Capacity of gantry crane is 18 tons, three joint arms, the most long-armed exhibition is 18.6 meters, minimum operating angle >=30 ° of arm, when gantry crane enter job site in place after, two kinds of operating modes when being now 30 meters of crossbeams (crossbeam weight is 2.75 tons) to lifting length are analyzed: (each alphabetical implication: H is the height of arm end to cross rail top, L is the spread length of arm, L1 is the distance of arm to awning edge, a is the angle of arm) (1), when H=3.5 rice, L=13.7 rice, L1=2.8 rice, a=52 °, (2), when H=5.5 rice, L=15.3 rice, L1=3.4 rice, a=57 °, 6th step: lifting cross beam: (1), respectively to bind two shake rope at the two ends of crossbeam, installs Special hoisting belt (steel wire cover), keeps balance after guaranteeing crossbeam lifting, (2), install train I road come to a complete stop in place after, the supporting leg of a platform side gantry crane is all stretched out, firmly props up and stand on reliable ground, topple when preventing crane from carrying.Then gantry crane starts to carry out lifting operation, first from peace row flat car, hard crossbeam is winched to I road and 3 line-to-line ground, road with gantry crane and assembles; Assemble the rear hard crossbeam utilizing the 18T gantry crane on peace row to assemble, sling slowly in fair line road, when height is to 8.8 meters, one platform end is held and is shaken 4 people of rope and utilize staircase to climb up a platform awning ceiling to hold with 2 platform ends and shake 4 people restricted and coordinate, the personnel holding rolling rope control turning to of crossbeam by slowly pulling rolling rope, make hard crossbeam transfer horizontal path to by fair line road, and about preventing crossbeam, swing up and down excessive; Hoistman now slowly swings arm toward a platform direction, and make beam vertical in circuit and the just state in overhead between two steel columns, the rise that hangs of crossbeam is that crossbeam lower chord exceedes capital 200 ~ 300mm; (3), every root pillar arranges 2 people to utilize climbers to climb on pillar correct position; (4), contraposition: crossbeam declines slowly, draw rolling rope personnel to coordinate and pull rolling rope, the flange of crossbeam one end and pillar flange disk center is first made to align, on bar, rolling rope is penetrated bolt and after installing nut additional by operating personnel, and the drawing of the other end is shaken rope personnel and coordinated the flange of the crossbeam other end and pillar flange disk center are aligned, and on bar, operating personnel penetrates bolt and after installing nut additional, two ends pillar operating personnel fastening bolt, until bolt all fastening reach moment values after, crane Zhai Hook, reset; 7th step: just whole: (1), slope measurement instrument is installed on the side of steel column cross line; (2), according to the inclination of line pendant; Loose nut, increases or reduces each spiral shell angle pad, be adjusted to steel column cross line direction upright; (3), gradient qualified after, by nut screwing clamping; (4), slope measurement instrument is placed in steel column along on the side of line direction; (5), by the method for step 2 steel column gradient is adjusted, to reaching standard, then clamp nut; (6), site clearing, carry out civilized construction.Fill in construction note; 8th step: site clearing.The whole positive technical standard of described 7th step: quality examination should be carried out according to acceptance criteria after 1) reaching the spot; 2) steel column and beam surface paint or zinc coat should intact non-corrodings, and weld does not have crack; 3) steel column stressed after oblique standard count from base surface; Cross line direction should be upright; Along line direction except anchor post Wai Ying center is upright; Allowable variation 0.3 ﹪; 4) adjust the steel plate washer that the gradient application thin and thick of steel column is different, every sheet pad area is not less than 50 × 100mm, and under each angle, pad quantity must not more than 2, and pad should be placed on below leading role's steel; Answer diagonal angle to circulate during clamp nut to carry out, make uniform force; 5) often organizing the hard crossbeam pillar line of centres should perpendicular to station main track, and deflection should not be greater than 2; 6) according to crossbeam numbering, crossbeam is assembled into entirety by smooth ground.Standard torque spanner should be adopted during crossbeam assembling.The installation Tightening moment of M20 connecting bolt is 280N.M; 7) crossbeam is after the assembling of ground, pads with chock or falsework, the chord member of crossbeam should do not made to bear the gravity of crossbeam below crossbeam; 8) each section of beam should be closely connected after connecting, and adjusting pad thick is 3 ~ 5mm, and area is identical with crossbeam angle steel; 9) crossbeam has certain reserved amount of deflection after having assembled, and reserved amount of deflection is for being less than or equal to 1/200; 10) when lifting cross beam, as according to wire rope, then the outside of wire rope should put protection tube, in case the crossbeam zinc coat that frays, lifting should adopt two, forbids single lifting.Hanging belt (wire rope) position should be installed rationally, is the level of state when ensureing that crossbeam is sling.
The beneficial effect of a kind of Existing Railway Line of the present invention contact net hard beam erection method is: the method is simple, convenient and practical, meet the construction of track traffic now demand, the railway network coil holder being applicable to develop rapidly is established, accelerate the speed of railway erection, make the trip of people more convenient and swift, make traffic more convenient.
The safety event that method of the present invention should be noted that when using:
1, steel column should install enough nut pads after installing in time, prevents pillar from toppling over.
2, the whole timing nut of steel column can only loosen, and can not unload, and adjusts side, and the nut of loose side, can not all loosen.
3, steel column and crossbeam should be checked the number installation.
The ground of 4, assembling crossbeam must be smooth, is placed in the middle of flat car top rail and must installs chock additional.
5, work high above the ground should perform relevant security regulations, steps on bar operating personnel and forbids to stand on below crossbeam.
6, before hard crossbeam installation operation, operating personnel should formulate detailed constructure scheme and measure for field condition, and construction person in charge must carry out construction safety to all personnel and confide a technological secret, and cadre scene must be had to stare at hilllock in crossbeam installation exercise process.
7, before construction operation, hoistman reply arrangement for crane machinery security performance and operating system check, are determining, in its mechanical performance situation in good condition, just can carry out lifting installation operation.
8, before lifting operation construction, hoistman and construction person in charge, will carry out safety inspection to the wire rope that lifting uses, hanging belt (wire rope) must not have broken lot, fracture (stock) phenomenon; The front requirement of lifting is first carried out examination and is hung, strict implement ' ten do not hang ' system in lifting process.
9, hard beam erection construction operation is carried out at interval or station, all liaison man in station must be set AT STATION, building site protection personnel is set at operation field, and janitor's room carries out construction registration AT STATION, job content, activity duration, influence basin are described to station, actively coordinate to obtain station.
10, before beam erection, the power line that reply is installed in radius is investigated, and hoistman, operating personnel are carried out to special safe construction and tell somebody what one's real intentions are.
11, crossbeam is installed front construction person in charge and first must be checked that whether steel column nut is complete, to prevent pillar obliquity effects train.
12, have the pillar of bracket before installation crossbeam, the bracket that construction person in charge tackles on pillar carries out safety inspection, and bracket must be fastening firm, and after preventing crossbeam from installing, bracket glides affects train, should reinforce steel column adjustment in time after beam erection.
During the isometrical pillar of 13, mounting flange disc type crossbeam, working vehicle or special ladder be adopted to assist, ladder and aid, rope must not fouling of clearance gauge.
14, both wired hard crossbeam is installed and must be lifted by crane in blocking time, and require during operation to guard adjacent lines, during lifting operation, scene will arrange special messenger to command, and forbids the phenomenon of the many people commanders of appearance crane.
15, during crossbeam lifting, crossbeam two controls to rock with auxiliary rope respectively, particularly face circuit do not block in situation, must when slinging beam height exceedes train height 2 ~ 3 meters, could slowly rotating beam, and notice that auxiliary rope must not fouling of clearance gauge; During lifting in the two ends of beam and radius, under arm, forbid the people that stands, in case lifting moment crossbeam swing is hurted sb.'s feelings.
16, in lifting process, forbid vehicle operating, forbid when car does not come to a complete stop to carry out lifting operation.Adjacent train by time, forbid to carry out that arm moves, lifting operation.
17, require in transportation to carry out necessary reinforcing to the crossbeam on flat car, operating personnel forbids to stand in squeeze when to avoid cross beam movement between two crossbeams and hinders trick.
18, night closing construction, must coordinate sufficient lighting apparatus reliably.
19, thick fog, heavy rain is met.The bad weathers such as typhoon, forbid to carry out beam erection operation.
20, during crane lifting pillar, crane must not overburden operation, and it is firm that protection supporting leg supports, and maximum lift heavy is selected according to its working curve, forbids across station track lifting pillar.
21, during lifting, forbid there is people under arm, prevent junk from hurting sb.'s feelings.
When 22, carrying out crane operation on level crossing and road, need special messenger be established to carry out security protection at two ends simultaneously.
23, in hoisting process, assumed unified command of by person in charge.
24, during pillar lifting, auxiliary anchor ear should be installed, prevent the slippage of lifting nylon rope.
25, checking that whether the overcoat of nylon sling is intact, prohibitting the use as damaged.
26, pillar, crossbeam are in transportation, and operating personnel should prevent from squeezing and hinder trick.
27, in lifting process, security official should note the safety of crane the moment, timely notification operator of pinpointing the problems.
28, other unaccomplished matter please refer to the execution of associated safety regulation.
Claims (2)
1. the hard beam erection method of Existing Railway Line contact net, is characterized in that: comprise the following steps:
The first step: cleaning base surface:
The steel-column foundation face preparing to install is cleaned out; Foundation bolt screw thread coating butter, gets all the nut, pad ready;
Second step: prepare steel column assembly:
(1), in the point of skylight: with installation train, steel column is transported to scene, steel column winches to by stanchion base by second hand rail road crane or mobile crane from peace row flat car;
(2), outside the point of skylight: carry out group with a 25T mobile crane outside a platform the North awning and stand, carry out group with a 25T mobile crane in road frame bridge Xia Fu road and stand;
(3), by vertical rod crane drive infield into, contraposition, come to a complete stop, beat supporting leg;
3rd step: steel column installation site adjusts:
(1), after steel column slings, coordinated by vertical rod personnel and hold up, push away, steel column is tilted, then by the bolt on steel column base apertures bit alignment base surface;
(2), all enter behind steel column base apertures position until foundation bolt, steel column lifting is vertically placed on base surface;
(3), at every root bolt a pad and nut are all installed, after by nut screwing clamping;
(4), vertical rod crane is withdrawn scene;
4th step: crossbeam is assembled:
(1), by each for crossbeam fragmented transport to on-the-spot;
(2), it is fixed on bolt by nut by the crossbeam end face of each segmentation down;
(3), turning beam to end face upward;
(4), at crossbeam two ends crossbeam paves by chock, makes in the middle of crossbeam unsettled;
(5), reserved amount of deflection is measured with level gauge, invar tape;
(6), reserved amount of deflection is not when meeting designing requirement, adjusts with pad;
(7), connection residue bolt is installed;
(8), in crossbeam both ends of the surface, hard crossbeam group number is indicated;
5th step: lifting cross beam performance analysis:
Our maximum Lifting Capacity of gantry crane is 18 tons, three joint arms, the most long-armed exhibition is 18.6 meters, minimum operating angle >=30 ° of arm, when gantry crane enter job site in place after, existing two kinds of operating modes when being 30 meters of crossbeams (crossbeam weight is 2.75 tons) to lifting length are analyzed: (each alphabetical implication: H is the height of arm end to cross rail top, and L is the spread length of arm, L1 is the distance of arm to awning edge, and a is the angle of arm)
(1), when H=3.5 rice, L=13.7 rice, L1=2.8 rice, a=52 °;
(2), when H=5.5 rice, L=15.3 rice, L1=3.4 rice, a=57 °;
6th step: lifting cross beam:
(1), at the two ends of crossbeam respectively bind two rolling ropes, install Special hoisting belt (steel wire cover), after guaranteeing crossbeam lifting, keep balance;
(2), install train I road come to a complete stop in place after, the supporting leg of a platform side gantry crane is all stretched out, firmly props up and stand on reliable ground, topple when preventing crane from carrying; Then gantry crane starts to carry out lifting operation, first from peace row flat car, hard crossbeam is winched to I road and 3 line-to-line ground, road with gantry crane and assembles; Assemble the rear hard crossbeam utilizing the 18T gantry crane on peace row to assemble, sling slowly in fair line road, when height is to 8.8 meters, one platform end is held and is shaken 4 people of rope and utilize staircase to climb up a platform awning ceiling to hold with 2 platform ends and shake 4 people restricted and coordinate, the personnel holding rolling rope control turning to of crossbeam by slowly pulling rolling rope, make hard crossbeam transfer horizontal path to by fair line road, and about preventing crossbeam, swing up and down excessive; Hoistman now slowly swings arm toward a platform direction, and make beam vertical in circuit and the just state in overhead between two steel columns, the rise that hangs of crossbeam is that crossbeam lower chord exceedes capital 200 ~ 300mm;
(3), every root pillar arranges 2 people to utilize climbers to climb on pillar correct position;
(4), contraposition: crossbeam declines slowly, draw rolling rope personnel to coordinate and pull rolling rope, the flange of crossbeam one end and pillar flange disk center is first made to align, on bar, rolling rope is penetrated bolt and after installing nut additional by operating personnel, and the drawing of the other end is shaken rope personnel and coordinated the flange of the crossbeam other end and pillar flange disk center are aligned, and on bar, operating personnel penetrates bolt and after installing nut additional, two ends pillar operating personnel fastening bolt, until bolt all fastening reach moment values after, crane Zhai Hook, reset;
7th step: just whole:
(1), slope measurement instrument is installed on the side of steel column cross line;
(2), according to the inclination of line pendant; Loose nut, increases or reduces each spiral shell angle pad, be adjusted to steel column cross line direction upright;
(3), gradient qualified after, by nut screwing clamping;
(4), slope measurement instrument is placed in steel column along on the side of line direction;
(5), by the method for step 2 steel column gradient is adjusted, to reaching standard, then clamp nut;
(6), site clearing, carry out civilized construction; Fill in construction note;
8th step: site clearing.
2. the hard beam erection method of a kind of Existing Railway Line contact net according to claim 1, is characterized in that: the whole positive technical standard of described 7th step:
1) quality examination should be carried out according to acceptance criteria after reaching the spot;
2) steel column and beam surface paint or zinc coat should intact non-corrodings, and weld does not have crack;
3) steel column stressed after oblique standard count from base surface; Cross line direction should be upright; Along line direction except anchor post Wai Ying center is upright; Allowable variation 0.3 ﹪;
4) adjust the steel plate washer that the gradient application thin and thick of steel column is different, every sheet pad area is not less than 50 × 100mm, and under each angle, pad quantity must not more than 2, and pad should be placed on below leading role's steel; Answer diagonal angle to circulate during clamp nut to carry out, make uniform force;
5) often organizing the hard crossbeam pillar line of centres should perpendicular to station main track, and deflection should not be greater than 2;
6) according to crossbeam numbering, crossbeam is assembled into entirety by smooth ground;
Standard torque spanner should be adopted during crossbeam assembling;
The installation Tightening moment of M20 connecting bolt is 280N.M;
7) crossbeam is after the assembling of ground, pads with chock or falsework, the chord member of crossbeam should do not made to bear the gravity of crossbeam below crossbeam;
8) each section of beam should be closely connected after connecting, and adjusting pad thick is 3 ~ 5mm, and area is identical with crossbeam angle steel;
9) crossbeam has certain reserved amount of deflection after having assembled, and reserved amount of deflection is for being less than or equal to 1/200;
10) when lifting cross beam, as according to wire rope, then the outside of wire rope should put protection tube, in case the crossbeam zinc coat that frays, lifting should adopt two, forbids single lifting; Hanging belt (wire rope) position should be installed rationally, is the level of state when ensureing that crossbeam is sling.
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| WO2020259469A1 (en) * | 2019-06-25 | 2020-12-30 | 中铁八局集团电务工程有限公司 | Welded overhead line system hard cross beam and construction method therefor |
| CN113602155A (en) * | 2021-07-01 | 2021-11-05 | 中铁十二局集团电气化工程有限公司 | Contact net hardware fitting installation and pillar assembling synchronous construction method |
| CN114674198A (en) * | 2022-02-24 | 2022-06-28 | 中铁建电气化局集团第三工程有限公司 | Hard beam foundation torsion angle measuring device and measuring system |
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| CN114674198A (en) * | 2022-02-24 | 2022-06-28 | 中铁建电气化局集团第三工程有限公司 | Hard beam foundation torsion angle measuring device and measuring system |
| CN114674198B (en) * | 2022-02-24 | 2024-03-12 | 中铁建电气化局集团第三工程有限公司 | Device and system for measuring torsion angle of hard beam foundation |
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Application publication date: 20160127 |