CN103311844A - Method for erecting mountainous-terrain cross charged high-voltage lines - Google Patents
Method for erecting mountainous-terrain cross charged high-voltage lines Download PDFInfo
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Abstract
The invention relates to a method for erecting high-voltage lines, in particular to a method for erecting mountainous-terrain cross charged high-voltage lines, which solves the problem that the current method for erecting the cross high-voltage lines cannot realize crossing under the condition of mountainous terrain. The method for erecting the mountainous-terrain cross charged high-voltage lines comprises the following steps: (1) setting up timber scaffolds and hanging pulleys: setting up a first timber scaffold of which the height is not lower than the height of a second new tower close to the second new tower, and hanging a first pulley at the cross arm of the second new tower; and setting up a second timber scaffold of which the height is at least 2 m higher than the height of a crossed tower near the crossed tower closest to a crossed charged high-voltage line, and hanging a second pulley at the top of the crossed tower. The bottom of the second pulley and the crossed charged high-voltage line on the crossed tower meet the safety distance 2.5m. The method has the advantages of reasonable design, low crossing project construction cost and high construction speed, meets the construction schedule requirement, and has a construction environment with higher safety.
Description
Technical field
The present invention relates to the erection method of high-tension line, be specially the stringing method that alpine terrain is crossed over charged high-tension line.
Background technology
The design addressing in domestic many ultra-high-tension power transmission lines path is avoided people's productive life district as much as possible often all in the hilly country, mountain area.Though ultra-high-tension power transmission line construction in mountain area has effectively utilized the soil, reduce engineering construction and take up an area of, strengthened the engineering construction difficulty simultaneously.In addition in ultra-high-tension power transmission line construction engineering, inevitably can run into the great leap construction problem of circuit, especially stride the construction of line of original high-tension line, can not cut off under the prerequisite of being crossed over the high-tension line power supply, how safety set up new line above it, need vast electricity power engineering builder emphasis to consider.
At present, setting up full hall scaffold method is leap technology commonly used in the high-tension line erection process.Yet under the alpine terrain condition, in the leap process, crossover point often is positioned at the col place, crosses over setting up apart from ground level of lead and often surpasses the carrying scope that material is built in the scaffold bottom, sets up full hall scaffold method and can not satisfy the leap construction requirement.For example, as shown in Figure 1, crossing over when being crossed over high-tension line 400 at the high-tension line 500 that newly sets up between the first newly-built tower 100 and the second newly-built tower 200, crossover point is positioned at the col place, crosses over highly to have surpassed 50m, can't set up full hall scaffold and realize crossing over.
Therefore, cross over original high-voltage line at alpine terrain and set up new electrical network, overhead distance is excessive usually to run into crossover point, adopts the bigger problem of full hall scaffold difficulty of construction.
Summary of the invention
The present invention is in order to solve under the alpine terrain condition, and the erection method of existing leap high-tension line can't be realized the problem of crossing over providing a kind of alpine terrain to cross over the stringing method of charged high-tension line.
The present invention adopts following technical scheme to realize:
A kind of alpine terrain is crossed over the stringing method of charged high-tension line, comprises the steps:
(1), set up timber scaffolding and hang pulley: set up one one on the second newly-built tower next door and highly be not less than the first high timber scaffolding of the second newly-built Tata, the cross-arm place on the second newly-built tower hangs first pulley; Crossed over the most contiguous being set up one one by the crossover tower next door and be higher than highly at least by second timber scaffolding of crossover tower tower height 2m of charged high-tension line, by top-hung second pulley of crossover tower, the bottom of described second pulley with satisfied safe distance 2.5m by the charged high-tension line of being crossed on the crossover tower;
(2), first lightning conducter put in exhibition: the bobbin of first lightning conducter is placed under the second newly-built tower, earlier first lightning conducter exhibition put to by on other second timber scaffolding of crossover tower, walk around second pulley, exhibition is put to the first newly-built tower again, first lightning conducter connects permanent fixation with gold utensil on the first newly-built tower, then first lightning conducter broken away from second pulley, do temporary transient fixing at second timber scaffolding;
(3) three thoroughly do away with the setting of edge ropes: the exhibition earlier of an end of the first insulation rope be put on second timber scaffolding and stride across first lightning conducter after be fixed on by dead astern Artificial Control, the other end of crossover tower on the ground; The end that the second insulation rope and the 3rd insulation are restricted is fixed on by the crossover tower cat head, strides across behind first lightning conducter the other end by by Artificial Control under the crossover tower; A pair of ingot card is respectively established in the place that strides across the second insulation rope and the 3rd insulation rope at first lightning conducter, guarantee that the second insulation rope and the 3rd insulation rope can not move left and right on first lightning conducter (i.e. second insulation restrict and the 3rd insulate restrict and can not move along first lightning conducter);
Setting up of (4) first lightning conducters: operating personnel are delivered to the second newly-built column overhead cross-arm with first lightning conducter end, with the fixing-line device temporary card on the second newly-built tower, the end is connected with connector with the steel wire rope of strand mill, steel wire rope is walked around first pulley, unclamp fixing-line device, grind tight first lightning conducter with strand under the second newly-built tower, simultaneously, in the stringing speed of the personnel that restricted by control first insulation at crossover tower place along with first lightning conducter, slowly loosen the first insulation rope, put in place until first lightning conducter stringing, at the second newly-built top of tower, with fixing-line device first lightning conducter snapped on the second newly-built tower, after first lightning conducter breaks away from first pulley, connect gold utensil then and be permanently affixed on the second newly-built tower; Simultaneously, the second insulation rope and the 3rd insulation rope play in the air with first lightning conducter, on first lightning conducter the distance of two pairs of ingot cards should guarantee this moment second the insulation rope and the 3rd insulation rope between width crossed over the width of charged high-tension line greater than the below, then the second insulation rope and the 3rd insulation rope tension back land used are anchored on the ground, make that being in is restricted by the second insulation rope between crossover tower top and first lightning conducter and the 3rd insulation to be higher than by the charged high-tension line of leap; Remove the first insulation rope;
(5), setting up of follow-up another root lightning conducter and six conductors:
Another root lightning conducter is put in a, exhibition: the bobbin of another root lightning conducter is placed under the second newly-built tower, earlier another root lightning conducter exhibition is put to by on other second timber scaffolding of crossover tower, walk around second pulley, exhibition is put to the first newly-built tower again, another root lightning conducter connects the gold utensil permanent fixation at the first newly-built tower, then another root lightning conducter is broken away from second pulley, do temporary transient fixing at second timber scaffolding; Another root lightning conducter exhibition places when putting on the second insulation rope and the 3rd insulation rope;
The setting of b, the first insulation rope: the exhibition earlier of an end of the first insulation rope be put on second timber scaffolding and stride across another root lightning conducter after be fixed on by dead astern Artificial Control, the other end of crossover tower on the ground;
C, setting up of another root lightning conducter: operating personnel are delivered to the second newly-built column overhead cross-arm with another root lightning conducter end, with the fixing-line device temporary card on the second newly-built tower, the end is connected with connector with the steel wire rope of strand mill, steel wire rope is walked around first pulley, unclamp fixing-line device, grind tight another root lightning conducter with strand under the second newly-built tower, simultaneously, in the stringing speed of the personnel that restricted by control first insulation at crossover tower place along with another root lightning conducter, slowly loosen the first insulation rope, put in place until another root lightning conducter stringing, at the second newly-built top of tower, with fixing-line device another root lightning conducter is snapped on the second newly-built tower, after another root lightning conducter breaks away from first pulley, connect gold utensil then and be permanently affixed on the second newly-built tower; Remove the first insulation rope;
D, repeat above-mentioned a, b, the c step is finished setting up of follow-up six conductors;
(6), after all constructions of line finish, remove the second insulation rope and the 3rd insulation and restrict.
It is a kind of novel crossing method that small size double-pole scaffold method is set up in the insulation rope cooperation that grows up on the basis of setting up full hall scaffold method, newly-built tower and crossed line the most contiguous by crossover tower two places, small size double-pole scaffold (for example setting up with cedar) is set, and adopting the insulation rope auxiliary, the realization alpine terrain is crossed over charged high-tension line stringing construction.
The characteristics of the inventive method are as follows:
1, use insulation rope, cedar for setting up main construction material, materials handling is convenient, installs and removes simple and easyly, sets up flexibly, sets up the efficient height, saving of work and time, and the support body of setting up is non-conductive, workmen's operational environment safety.
2, by newly-built tower and crossed line the most contiguous respectively taken a scaffold body by the crossover tower next door, exceeded by more than the leap tower height 2m by the other scaffold height degree of crossover tower, the scaffold body can protect the side of staying by the high-voltage line on the crossover tower, can ensure the safe distance of workmen's construction environment and high-voltage line simultaneously.
3, thoroughly do away with the edge rope by rationally arranging three, wherein become splay angle to hang two dicyclo insulation ropes on the steel strand wire (first lightning conducter), work to protect frame in the strand mill stringing process under the second newly-built tower, the first insulation rope has guiding and stabilization.
4, mechanized construction degree height cooperates manual adjustment simultaneously, not only can accelerate construction of line speed, and is crossed over high-voltage line below can guaranteeing not influence in the work progress and normally use.
5, steel strand wire are tightened to the position after, first timber scaffolding on the second newly-built tower side is as workmen's operating platform, carry out follow-up works such as picture seal, broken string, hanging wire (when drawing seal, broken string lightning conducter, lead secondary being landed), execution conditions improve, the efficiency of construction height.
The beneficial effect of the inventive method is as follows:
1, technical benefits: adopt the insulation rope to cooperate double-pole scaffold to set up the power network line of crossing over original high-voltage line, simultaneously in circuit stretch-draw erection construction process, mechanized construction is main, manual adjustment is auxilliary, not only can accelerate construction of line efficient height, and erection process safety, also can utilize and build support body and finish operations such as next step circuit connection, technical benefits is remarkable.
2, economic benefit: do boundary belt electric line support body with cedar; reduced the area of setting up of crossing frame; alleviated working strength of workers; compare with adopting traditional full hall scaffold, set up in the process at support body, save the built material and drop into about 50%; save the labour and drop into 30%; save man-hour 25%, can save comprehensive cost more than 10%, shorten man-hour about 15%.
3, social benefit: utilize the cooperation of many eradication edge ropes to set up the small size double-pole scaffold and carry out charged high-tension line leap, effectively utilize the insulation rope to cooperate the cedar scaffold, using material all is reliable insulating material, and by setting up support body, make the workmen as far as possible away from the high-tension bus-bar scope, can ensure workmen's safety as far as possible, have preferably and social benefit.
4, environmental benefit: adopt insulation rope and cedar, be convenient to transport at alpine terrain, but material repeated multiple times utilization, the use material environment friendly is pollution-free, the construction site is away from resident's productive life district, and the control construction noise, to forbidding the scene to burn construction dead meals such as rubber, have environmental benefit preferably.
The beneficial effect of application example is as follows:
(1), certain 35KV track remodelling engineering
This project is transformed horizontal linear apart from 6.387Km, and relative relief 190m newly installs iron tower 16 bases, utilizes iron tower 9 bases, wiring on the same tower LGJ-240/40 steel reinforced aluminium conductor and GJ-50 lightning conducter.The circuit general direction from east to west, wherein circuit is crossed over 10 completely, 6KV circuit 4 places, is crossed over 307 national highways, 1 place.Begin circuit from the 11# tower and cross over the zanjon mountain valley, basis, tower position is in the hillside, and wherein high tower position is 965 meters of height above sea level, avoids the unstable location of new tomography during foundation excavation.Adopt " alpine terrain is crossed over charged high-tension line stringing construction ", have advanced person, suitable and assurance project quality and characteristics such as safety, raising efficiency of construction, reduction engineering cost, reduction of erection time is more than 10%, save cost about 13%, about 650,000 yuan, remarkable economical, environmental protection and social benefit have been obtained.
(2), certain step-down station to line tower potential safety hazard is administered engineering
This project is transformed horizontal linear apart from 2.84km, and relative relief 115m newly installs iron tower 7 bases, adopts the double loop iron tower to set up wiring on the same tower LGJ-150/35 steel reinforced aluminium conductor and GJ-50 lightning conducter.Transformation is set up a full medium of ADSS-PE-16B1 and is called oneself formula optical cable 3.9km in stringing.The circuit general direction from south to north, institute is the mountain region through the location, basis, tower position is in the hillside, wherein high tower position is 1080 meters of height above sea level.Wherein 6#-7# tower circuit is crossed over country road one place, crosses over 35KV circuit one place and telephone communication circuit 2 places.Adopt " alpine terrain is crossed over charged high-tension line stringing construction " construction, compare with traditional construction and to have that speed of application is fast, quality is convenient to control, is comprehensively saved the cost ratio than advantages such as height, reached the effect of expected design, remarkable economical, environmental protection and social benefit have been obtained, save cost about 12%, about 600,000 yuan relatively.
(3), built on stilts, the communication line engineering of certain subregion 35KV
This project horizontal linear is apart from 5.98km, and relative relief 220m sets up LGJ-240/40 steel reinforced aluminium conductor and GJ-50 lightning conducter, and iron tower 20 bases are newly installed in the installation of supporting gold utensil.Set up the full medium of ADSS-PE-16B1 and call oneself formula optical cable 8.4km * 2, one as electric power conduct and communication, and another root is as mine communication.The line route general direction is by north orientation southwest, and institute is mountain region and river, Nanchuan through the location, and basis, tower position is positioned at arable land, hillside, and wherein high tower position is 1045 meters of height above sea level.Adopt " alpine terrain is crossed over charged high-tension line stringing construction " construction, be that object, technology are core with the engineering, use the principle of system engineering, advanced technology and scientific management are combined, when satisfying engineering design stability, construction quality and construction period, compare with conventional method, from saving material, manually reaching aspect analysis-by-synthesis such as machine cost, save cost more than 13%, about about 650,000 yuan.
The inventive method is reasonable in design, and the overhead crossing engineering cost is low, artificial cooperative mechanical construction in the construction, and speed of application is fast, satisfies the construction schedule requirement, has the higher construction environment of fail safe.Efficiently solve under the alpine terrain condition, the erection method of existing leap high-tension line can't be realized the problem of crossing over.
Description of drawings
Fig. 1 newly sets up high-tension line to cross over the schematic diagram of being crossed over high-tension line.
Fig. 2 is the schematic diagram that sets up of first lightning conducter.
Among the figure, the 100-first newly-built tower, the 200-second newly-built tower, 300-is by crossover tower, 400-is crossed over charged high-tension line, and 500-newly sets up high-tension line, 10-ingot card, 20-first timber scaffolding, 30-second timber scaffolding, the 40-first insulation rope, the 50-second insulation rope, 60-the 3rd insulation rope, first lightning conducter of 90-.
Embodiment
Below in conjunction with accompanying drawing specific embodiments of the invention are elaborated.
As shown in Figure 1, 2, a kind of alpine terrain is crossed over the stringing method of charged high-tension line, comprises the steps:
(1), sets up timber scaffolding and hang pulley: set up a cross-arm place on first timber scaffolding, 20, the second newly-built towers 200 that highly are not less than second newly-built tower 200 tower heights on the second newly-built tower, 200 next doors and hang first pulley; By cross over charged high-tension line 400 the most contiguous set up by crossover tower 300 next doors one one be higher than highly at least by the second timber scaffolding 30(of crossover tower 300 tower height 2m protect the side of staying by the charged high-tension line 400 of leap), by top-hung second pulley of crossover tower 300, the bottom of described second pulley with satisfied safe distance 2.5m by the charged high-tension line 400 of being crossed on the crossover tower 300.
(2), first lightning conducter put in exhibition: the bobbin of first lightning conducter 90 is placed into the second newly-built tower 200 times, earlier 90 exhibitions of first lightning conducter are put to by on other second timber scaffolding 30 of crossover tower 300, walk around second pulley, exhibition is put to the first newly-built tower 100 again, first lightning conducter 90 connects permanent fixation with gold utensil on the first newly-built tower 100, then first lightning conducter 90 broken away from second pulley, do temporary transient fixing at second timber scaffolding 30.
(3) three thoroughly do away with the setting of edge ropes: the exhibition earlier of an end of the first insulation rope 40 is put on second timber scaffolding 30 and strides across that first lightning conducter is after 90s to be fixed on the ground by the dead astern Artificial Control of crossover tower 300 (at stringing time control slightly), the other end; One end of the second insulation rope the 50 and the 3rd insulation rope 60 is fixed on by crossover tower 300 cats head, strides across first lightning conducter other end after 90s by by 300 times Artificial Control of crossover tower; A pair of ingot card 10 is respectively established in the place that strides across the second insulation rope the 50 and the 3rd insulation rope 60 at first lightning conducter 90, guarantees that the second insulation rope the 50 and the 3rd insulation rope 60 can not move left and right on first lightning conducter 90.
Setting up of (4) first lightning conducters: operating personnel are delivered to the second newly-built tower 200 cat head cross-arms with first lightning conducter 90 end, with the fixing-line device temporary card on the second newly-built tower 200, the end is connected with connector with the steel wire rope of strand mill, steel wire rope is walked around first pulley, unclamp fixing-line device, the second newly-built tower 200 times is with tight first lightning conducter 90 of strand mill, simultaneously, by the stringing speed of the personnel of the control first at crossover tower 300 places insulation rope 40 along with first lightning conducter 90, slowly loosen the first insulation rope 40(in order to avoid stringing speed is fast, cause first lightning conducter 90 rocking tendency big, pendulum is to being crossed on the charged high-tension line 400), put in place until first lightning conducter 90 stringing, at the second newly-built tower, 200 tops, with fixing-line device first lightning conducter 90 snapped on the second newly-built tower 200, after first lightning conducter 90 breaks away from first pulley, connect gold utensil then and be permanently affixed on the second newly-built tower 200; Simultaneously, the second insulation rope the 50 and the 3rd insulation rope 60 plays in the air with first lightning conducter 90, the distance of two pairs of ingot cards 10 should guarantee that the width between the second insulation rope the 50 and the 3rd insulation rope 60 this moment crossed over the width of charged high-tension line 400 greater than the below on first lightning conducter 90, to fasten after 60 tensions of the second insulation rope the 50 and the 3rd insulation rope by the shank of crossover tower 300 then, make to be in to be higher than by the second insulation rope the 50 and the 3rd insulation rope 60 between crossover tower 300 tops and first lightning conducter 90 and crossed over charged high-tension line 400(because the deadweight effect, crossed over charged high-tension line 400 from by crossover tower 300 more away from, sagging more obvious, so necessarily can be formed one and be higher than the guide plane of being crossed over charged high-tension line 400 to having hung over the second insulation rope the 50 and the 3rd insulation rope 60 that is Eight characters shape on first lightning conducter 90 by crossover tower 300 top, when continuing tight lead and lightning conducter, stringing above this, frame is worked to protect in the plane, is crossed over charged high-tension line 400 in order to avoid lead and lightning conducter are run into the below); Remove the first insulation rope 40.
(5), setting up of follow-up another root lightning conducter and six conductors:
Another root lightning conducter is put in a, exhibition: the bobbin of another root lightning conducter is placed into the second newly-built tower 200 times, earlier another root lightning conducter exhibition is put to by on other second timber scaffolding 30 of crossover tower 300, walk around second pulley, exhibition is put to the first newly-built tower 100 again, another root lightning conducter connects the gold utensil permanent fixation at the first newly-built tower 100, then another root lightning conducter is broken away from second pulley, do temporary transient fixing at second timber scaffolding 30; Another root lightning conducter exhibition places when putting on the second insulation rope the 50 and the 3rd insulation rope 60;
The setting of b, the first insulation rope: the exhibition earlier of an end of the first insulation rope 40 be put on second timber scaffolding 30 and stride across another root lightning conducter after be fixed on by dead astern Artificial Control, the other end of crossover tower 300 on the ground;
C, setting up of another root lightning conducter: operating personnel are delivered to the second newly-built tower 200 cat head cross-arms with another root lightning conducter end, with the fixing-line device temporary card on the second newly-built tower 200, the end is connected with connector with the steel wire rope of strand mill, steel wire rope is walked around first pulley, unclamp fixing-line device, the second newly-built tower 200 times is with tight another root lightning conducter of strand mill, simultaneously, by the stringing speed of the personnel of the control first at crossover tower 300 places insulation rope 40 along with another root lightning conducter, slowly loosen the first insulation rope 40, put in place until another root lightning conducter stringing, at the second newly-built tower, 200 tops, with fixing-line device another root lightning conducter is snapped on the second newly-built tower 200, after another root lightning conducter breaks away from first pulley, connect gold utensil then and be permanently affixed on the second newly-built tower 200; Remove the first insulation rope 40;
D, repeat above-mentioned a, b, the c step is finished setting up of follow-up six conductors.
(6), after all constructions of line finish, remove the second insulation rope the 50 and the 3rd insulation rope 60.
During concrete enforcement, the selection of first and second timber scaffolding body position: at first installation place weather and surrounding environment are investigated the feasibility that the assessment construction plan is implemented.
The scaffold job location is selected to follow following principle: 1, guarantee the smooth compacting of double-pole scaffold substrate, enough bearing capacitys are arranged; 2, the qualified back of substrate snap the line, vertical rod location.
The scaffold body construction: setting up or remove under good weather of scaffold carried out, and sets up with solid and dry cedar.When support body is set up when high from span line 2m, upright two row's vertical rods respectively at each 2m place, circuit both sides of being crossed over earlier are higher than the minimum 2m of circuit, and temporary fixed with the coir rope backguy, with control lever to charged side not; Arrange and bind to horizon bar in length and breadth, transmit rod from the outside of an edge-on bar, tie down the rod opposite side with the insulation rope, will restrict and pass through the circuit throwing to the other end, with rope hack lever is taken in the opposite side vertical rod.
The scaffold body is removed: the dismounting of crossing frame must be noted that to take tears order open, and built gets on, get off, and tears frame open and goes up afterwards earlier, take afterwards earlier and tear open, after take the principle of tearing open earlier, tear bridging, diagonal brace earlier open, after tear little cross bar, leger, vertical rod etc. open; And by one the step one clear principle carry out successively.
Lime light in the use of insulation rope is as follows:
When 1, the first insulation rope is for the control stringing, in order to avoid stringing speed is fast, cause lightning conducter and lead rocking tendency big, pendulum is needed artificial control payingoff speed to crossing on the charged high-tension line, firmly drags tight; Every lead and lightning conducter are all removed after tightly rising.
2, the second insulation rope and the 3rd position of insulation rope on first lightning conducter, leave certain distance, become splayed, be wider than the below and crossed over the width of high-tension line, for guaranteeing not (laterally) movement about on first lightning conducter of two dicyclos insulation rope, on first lightning conducter, two positions two pairs of ingot cards are installed respectively, are left the slit in the middle of every pair of ingot card, just in time block second and third insulation rope respectively.
3, after first lightning conducter tightly rises, the position of the assurance second insulation rope and the 3rd insulation rope is higher than by leap high-tension line the top lead.
4, second, third insulation rope is removed behind constructed all lightning conducters and lead again.
The wire erection lime light is as follows:
1, the bobbin placement location is selected: the bobbin placement location should be setting up near the lead first newly-built tower, so that transportation; Smooth compacting is wanted on the preceding ground of constructing, and prevents from causing danger etc. because ground relief rolls bobbin.
2, carry out the preparation of workmen and construction equipment before the construction, and send the special messenger to verify strand mill and each parts model of fixing-line device, whether quantity intact, and damage and undesired banning use of are arranged.
3, unwrapping wire, when removing the work of line and stringing, should establish the special messenger commander.
4, instrument, material transfer must use specific purpose tool or rope to transmit up and down, forbid to toss up and down, and prevent under the iron tower that personnel from staying.
5, tight, when putting lead, all ropes, lead must not be entangled on one's body the operating personnel, during stringing, the staff must not or stand in lead interior angle side across lead, prevents accident.
Main material is as follows:
1, steel strand wire (do lightning conducter use): adopt the GJ-50 steel strand wire, twisted wire surface do not have macroscopic defective such as tangible impression, cut etc. twist in the process processed, single or many galvanized steel wires any joint that all do not have.
2, steel reinforced aluminium conductor (making lead uses): adopt the LGJ-240/40 steel reinforced aluminium conductor, aluminum steel should meet " electrician's circle aluminum steel " (GB/T 3955-2009) standard respectively, centered by galvanized steel wire, evenly, closely stranded, the direction that every layer line strand is twisted with the fingers should be opposite, the direction that outermost one deck strand is twisted with the fingers should be right-laid to (Z-is stranded), steel core after being twisted into should be arranged nature, after steel core cuts off, steel wire should be still in position or be easy to return near the original position, this requirement is equally applicable to each layer aluminum steel.
3, cedar: cedar entire body diameter should be controlled between 80mm～180mm, and is wooden hard, do not have obvious slight crack, volume drying; When setting up support body, when rod length is not enough, tie up into chevron shaped strut on side frames top, inwardly prop up the top, the more horizontal thereon rod of tying up.
4, insulation rope: the insulation rope is selected to meet " live line working insulation ropes " (GB/T 13035-2008) requirement.Insulation rope length is not less than 200m, and the soma of guaranteeing during use to restrict is dry.
Scaffold and insulation rope quality assurance measure are as follows:
1, scaffold building quality control:
1.1, the support body size determines according to the height of tower.
1.2, vertical rod sets up: vertical pole ' s span 2m * 2m.The lap joint of the adjacent vertical rod step frame that should stagger, vertical rod must be vertical and spacing is even.
1.3, vertically, transverse bar: step pitch press the 1.5m setting.The vertical equity bar is arranged on the vertical rod inboard, and during colligation first step vertical equity bar, vertical rod must be vertical.
1.4, the bar setting of sweeping the floor: the 200 mm places overhead in vertical rod bottom, the bar of sweeping the floor is set, to arranging simultaneously, the vertical rod basis must be striden the bar of vertically sweeping the floor of eminence with vertical rod to lower prolongation two and fix not on sustained height in length and breadth, difference of height is not more than 1m.
1.5, stretch-draw fixedly installs: around the outside of support body and inner horizontal 6m-9m at interval, vertical 4m-6m at interval arranges backguy, and the support body top arranges the goat's horn bar all around.
1.6, the bridging setting: around the support body outside and inside arranges continuously vertical bridging to every 6m by the end to top in length and breadth, in the support body bottom, top and vertical being no more than 6m arranges the continuous horizontal bridging respectively at interval.Horizontal cross brace arranges at vertical bridging brace intersecting plane, and the bridging width is 6m.
1.7, the minimum safe distance between crossing frame and the electrified body should meet table 1.
Table 1 circuit crossing frame is crossed over charged high-tension line minimum safe distance with quilt
2, insulation rope setting, service quality control:
2.1, an end land used of the first insulation rope is anchored on the ground, the other end manually draws in the iron tower dead astern and puts, put rope speed according to lightning conducter apart from below high-voltage line distance, suitably slow down.
2.2, second and third rope that insulate, an end is fixed on by the crossover tower top, the other end is tightened behind first lightning conducter strand mill tight rope, be fixed on by on the column foot of crossover tower, and in work progress, the emphasis monitoring, if relaxation is arranged, stop construction at once, tighten the insulation rope again.
2.3, the first insulation rope after pulling down at every turn, need carry out the entire body inspection, guarantee no serious damage, land and do not get wet in the removal process.
Claims (2)
1. an alpine terrain is crossed over the stringing method of charged high-tension line, it is characterized in that: comprise the steps:
(1), set up timber scaffolding and hang pulley: set up first timber scaffolding (20) that highly is not less than second newly-built tower (200) tower height on the second newly-built tower (200) next door, the cross-arm place on the second newly-built tower (200) hangs first pulley; Crossed over the most contiguous being set up one one by crossover tower (300) next door and be higher than highly at least by second timber scaffolding (30) of crossover tower (300) tower height 2m of charged high-tension line (400), by top-hung second pulley of crossover tower (300), the bottom of described second pulley with satisfied safe distance 2.5m by the charged high-tension line (400) of being crossed on the crossover tower (300);
(2), first lightning conducter put in exhibition: the bobbin of first lightning conducter (90) is placed under the second newly-built tower (200), earlier with first lightning conducter (90) Zhan Fangzhi by on other second timber scaffolding (30) of crossover tower (300), walk around second pulley, exhibition is put to the first newly-built tower (100) again, first lightning conducter (90) gone up at the first newly-built tower (100) and connected permanent fixation with gold utensil, then first lightning conducter (90) broken away from second pulley, do temporary transient fixing at second timber scaffolding (30);
(3) three thoroughly do away with the setting of edge rope: first end exhibition earlier of insulating rope (40) is put into and is being fixed on by dead astern Artificial Control, the other end of crossover tower (300) on the ground after first lightning conducter (90) gone up and striden across to second timber scaffolding (30); One end of the second insulation rope (50) and the 3rd insulation rope (60) is fixed on by crossover tower (300) cat head, strides across first lightning conducter (90) back other end by by Artificial Control under the crossover tower (300); A pair of ingot card (10) is respectively established in the place that strides across the second insulation rope (50) and the 3rd insulation rope (60) at first lightning conducter (90), guarantee the second insulation rope (50) and the 3rd insulate restrict (60) can not move left and right on first lightning conducter (90);
Setting up of (4) first lightning conducters: operating personnel are delivered to second newly-built tower (200) the cat head cross-arm with first lightning conducter (90) end, with the fixing-line device temporary card on the second newly-built tower (200), the end is connected with connector with the steel wire rope of strand mill, steel wire rope is walked around first pulley, unclamp fixing-line device, the second newly-built tower (200) is down with strand mill tight first lightning conducter (90), simultaneously, in the personnel of the control located by crossover tower (300) the first insulation rope (40) the stringing speed along with first lightning conducter (90), slowly loosen the first insulation rope (40), put in place until first lightning conducter (90) stringing, at second newly-built tower (200) top, with fixing-line device first lightning conducter (90) snapped on the second newly-built tower (200), first lightning conducter (90) connects gold utensil then and is permanently affixed on the second newly-built tower (200) after breaking away from first pulley; Simultaneously, the second insulation rope (50) and the 3rd insulation rope (60) play in the air with first lightning conducter (90), the distance of the last two pairs of ingot cards of first lightning conducter (90) (10) should guarantee this moment second insulation rope (50) and restrict width between (60) of the 3rd insulation crossed over the width of charged high-tension line (400) greater than the below, then with fasten after the second insulation rope (50) and the 3rd insulation rope (60) tension by the shank of crossover tower (300), make be in by the insulation rope of second between crossover tower (300) top and first lightning conducter (90) (50) and the 3rd insulation restrict (60) be higher than by leap charged high-tension line (400); Remove the first insulation rope (40);
(5), setting up of follow-up another root lightning conducter and six conductors:
Another root lightning conducter is put in a, exhibition: the bobbin of another root lightning conducter is placed under the second newly-built tower (200), earlier another root lightning conducter exhibition is put to by on other second timber scaffolding (30) of crossover tower (300), walk around second pulley, exhibition is put to the first newly-built tower (100) again, another root lightning conducter connects the gold utensil permanent fixation at the first newly-built tower (100), then another root lightning conducter is broken away from second pulley, do temporary transient fixing at second timber scaffolding (30); Another root lightning conducter exhibition places when putting on the second insulation rope (50) and the 3rd insulation rope (60);
The setting of b, the first insulation rope: the exhibition earlier of an end of the first insulation rope (40) is put into and is being fixed on by dead astern Artificial Control, the other end of crossover tower (300) on the ground after another root lightning conducter is gone up and striden across to second timber scaffolding (30);
C, setting up of another root lightning conducter: operating personnel are delivered to second newly-built tower (200) the cat head cross-arm with another root lightning conducter end, with the fixing-line device temporary card on the second newly-built tower (200), the end is connected with connector with the steel wire rope of strand mill, steel wire rope is walked around first pulley, unclamp fixing-line device, the second newly-built tower (200) is down with tight another root lightning conducter of strand mill, simultaneously, in the personnel of the control located by crossover tower (300) the first insulation rope (40) the stringing speed along with another root lightning conducter, slowly loosen the first insulation rope (40), put in place until another root lightning conducter stringing, at second newly-built tower (200) top, with fixing-line device another root lightning conducter is snapped on the second newly-built tower (200), after another root lightning conducter breaks away from first pulley, connect gold utensil then and be permanently affixed on the second newly-built tower (200); Remove the first insulation rope (40);
D, repeat above-mentioned a, b, the c step is finished setting up of follow-up six conductors;
(6), after all constructions of line finish, remove the second insulation rope (50) and the 3rd insulation restrict (60).
2. alpine terrain according to claim 1 is crossed over the stringing method of charged high-tension line, it is characterized in that: described first and second timber scaffolding (20,30) adopts cedar to set up, and described cedar diameter is between 80mm～180mm.
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