CN101442194A - Spanning method for ultra, extra high voltage line construction without crossover frame - Google Patents
Spanning method for ultra, extra high voltage line construction without crossover frame Download PDFInfo
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- CN101442194A CN101442194A CNA2008100793879A CN200810079387A CN101442194A CN 101442194 A CN101442194 A CN 101442194A CN A2008100793879 A CNA2008100793879 A CN A2008100793879A CN 200810079387 A CN200810079387 A CN 200810079387A CN 101442194 A CN101442194 A CN 101442194A
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Abstract
The invention provides a method for spanning without spanning frames in super/ultra-high voltage line construction. The method comprises the steps of adopting a newly-built line steel tower (1) as a terminal spanning frame body, installing an auxiliary beam (2) on the newly-built line spanning-crosspiece steel tower (1) as a terminal connecting facility of a network closing device (7) and a connecting device of a carrying rope (6), installing the network closing device (7) within a safe distance above a spanned object (11) and erecting a power line on the network closing device (7) so as to perform spanning construction. The method is applicable to not only the live spanning power-line construction of super/ultra-high voltage lines, but also the construction of spanning communication lines, railways, highways, freeways, viaducts, rivers and other projects, thereby well solving the technical problems of power transmission line spanning construction. The method is substituted for the prior method of setting up spanning frames for spanning construction, achieves the aim of not affecting the operation of the spanned object, improves construction efficiency, and particularly improves construction safety, thereby having remarkable economic and social benefit.
Description
Technical field
The present invention relates to a kind of transmission line and cross over construction method, particularly a kind of super, extra high voltage line construction does not have the crossing frame crossing method.
Background technology
The power grid construction speed of China over nearly 20 years develops very fast, and now having formed with 500kV is the supergrid system of key north and south in length and breadth, connection thing.Along with the 1000kV UHV transmission line implement in full and ± construction of 800kV direct current UHV transmission line, the electrical network dilatation is quite rapid.Increasing scissors crossing problem mutually when carrying out power line construction, occurred, formed large tracts of land multiple spot leap order wire, railway, highway, highway, overpass and crossed over the supertension line phenomenon that has put into operation.And, might occur with a plurality of different thing or more than the many times grade of situations that the direct current extra high voltage network is backcrossed in continuous leap more of being crossed over of the interior leap of shelves in order to utilize limited crossover point to greatest extent.Thereby the leap problem, particularly crossed over the normal operation of thing and be the leap problem of prerequisite not influencing, in the transmission line erection construction, seemed quite outstanding and important.
It is various that the current power transmission industry is crossed over construction plan, sets up crossing frame construct as the mode that the terminal of block device connects facility in crossing over shelves but all adopt substantially.Promptly adopt steel pipe, cedar or two kinds of combinations of materials of bamboo bar to set up crossing frame or employing almag or steel structure formula crossing frame, utilize then to be crossed over the of short duration time that stops to run of thing or do not stop operation fully and carry out block; Row is opened up the method for putting multistage guiding rope, pull rope and lead wire and earth wire optical cable again.Said method not only manpower, material and Work tool input is bigger, and sets up support body and need the workmen to carry out work high above the ground, and hazards such as personal safety and the injury of getting an electric shock strengthen, and the personal safety problem under the complicated construction state is just outstanding more more to cross over thing.Moreover, because the possessory power of produce has been strengthened in the promulgation of " law of property ", this makes the relevant co-ordination of crossing over construction become difficult more, the difficulty that stops to run is increasing, especially crosses over the extra-high voltage line of force, the leap operation of can not implementing again to have a power failure.
Summary of the invention
Task of the present invention provides a kind of super, extra high voltage line construction does not have the crossing frame crossing method.This method adopts newly-built line steel tower as the terminal cross support body, is aided with the terminal connection facility of gate beam as the block device, makes full use of newly-built line steel tower and realizes crossing in the shelves purpose of constructing.This method is not only applicable to ultra high voltage, the construction of supertension line live across power line, also is applicable to engineering constructions such as crossing over order wire, railway, highway, highway, overpass, river, has solved transmission line well and has crossed over the technical barrier of construction.
The technical scheme of finishing task of the present invention is: adopt newly-built line steel tower as the terminal cross support body, cross at newly-built circuit gate beam connects facility and ropeway carrying-rope as the terminal of block device jockey is installed on the shelves iron tower; Cross at quilt again the block device is installed in the safe distance above the thing; The leap construction that the way of erecting power lines carries out being crossed over thing above the block device then.Concrete steps are:
(1) according to crossing over shelves and the design parameter of iron tower and the configured length that the site contour condition is determined ropeway carrying-rope, block device, gate beam pattern, length and ropeway carrying-rope.
(2) carry out simulation modeling, by calculating lead impact coefficient and the lead parameters such as unbalance factor of being caught, determine ropeway carrying-rope sag and specification in the state of accident under the corresponding span condition, and calculate the sag of ropeway carrying-rope under zero load and unwrapping wire state and carry out Construction control, and definite ropeway carrying-rope and the safe distance of being crossed over thing.
(3) determine that gate beam is provided with the position.
(4) complete unit is installed, is comprised gate beam, ropeway carrying-rope, block device, carry out circuit and cross over construction.
Use super, extra high voltage line construction provided by the present invention not have the crossing frame crossing method, from current energy-conserving and environment-protective, improve efficiency of construction, guarantee that iron tower structure and accident condition crossed over the security standpoint of power circuit down, not only realized not influencing the purpose of being crossed over the thing operation, and the hazards of setting up support body in the past and being produced have been eliminated, the working security height, drop into for a short time, economic benefit and social benefit are very remarkable.
Description of drawings
Fig. 1 is newly-built line steel tower and gate beam scheme of installation
Fig. 2 is the method for the invention construction schematic diagram.
Among the figure: the newly-built line steel tower of 1-; The 2-gate beam; The 3-suspension cable; 4,5-pulley; 6-ropeway carrying-rope 7-block device; The 8-net-supporting rod that insulate; The 9-adjusting device; 10,14-anchor point; 11-is crossed over thing (being striden power line); 12,13-backguy;
Embodiment
Fig. 1, shown in Figure 2 as the terminal cross support body, installs gate beam 2 connects facility and ropeway carrying-rope 6 as the terminal of block device 7 jockey with newly-built line steel tower 1 on newly-built circuit leap shelves iron tower 1.Gate beam 2 is divided into elongated or two types of phase-splitting segmenteds, determines according to tower.Cross at quilt again block device 7 is installed in the safe distance above the thing 11.Erecting power lines is crossed over construction above block device 7 then.
Concrete steps are as follows:
(1) determines ropeway carrying-rope 6, block device 7, the length of gate beam 2 patterns, length and ropeway carrying-rope 6 according to the design parameter and the site contour condition of crossing over shelves and newly-built line steel tower 1.
Ropeway carrying-rope 6 connects, support block device 7, and by being anchored in ground anchor point 10 after pulley 4,5 tensions.
(2) carry out simulation modeling.By calculating lead impact coefficient and the lead parameters such as unbalance factor of being caught, determine ropeway carrying-rope 6 sag and specification in the state of accident under the corresponding span condition, and calculate the sag of ropeway carrying-rope 6 under zero load and unwrapping wire state and carry out Construction control, to guarantee ropeway carrying-rope 6 and the safe distance of being crossed over thing 11.
Ropeway carrying-rope 6 with crossed over thing 11 safe distances definite method be: the state equation of joining rack ceases to be busy rope, by finding the solution simple cubic equation, calculate the sag of ropeway carrying-rope 6 under various states, control the home of ropeway carrying-rope 6 simultaneously with ropeway carrying-rope 6 sags with to the setting numerical value that the clear distance of object being spanned 11 requires, this is an important way of guaranteeing ropeway carrying-rope 6 safety under each state of payingoff construction process.
Drawing ropeway carrying-rope 6 according to formula is 7.5-15 rice with the safe distance of being crossed over thing 11.
Impact coefficient calculates:
The equivalent average distance m of lead and ropeway carrying-rope block device during Δ f-----unwrapping wire operating mode;
The impact coefficient that lead is caught is generally got (k
d)
Max=1.67.
The calculating of unbalance factor:
Ropeway carrying-rope 6 is connected with block device 7 and can equivalence carries out force analysis for simply supported beam.Equal lead line of fall point and (along line direction) selvage along the peaked 2 times of ratios with the net width of distance according to the formula unbalance factor.Ropeway carrying-rope 6 stressed unbalance factors generally get 1.2.
(3) determine that gate beam 2 is provided with the position.
Analysis-by-synthesis ropeway carrying-rope 6 is suspended from the lead design attitude with gate beam 2 and selects 4-6 rice, below in the clearance requirement of installing additional under block device 7 backs and the lead unwrapping wire state.
(4) complete unit is installed, is comprised terminal jockey, ropeway carrying-rope, block device, carry out circuit and cross over construction.
A, gate beam 2 are installed
B ropeway carrying-rope 6 and the exhibition of danish seine rope are put
1. making preliminary leading rope with the small dimension high-strength insulation rope of configuration on helicopter or the light showing and placing of the tension ropeway carrying-rope 6 of propeller-parachuting uses.
2. utilizing the middle size high-tensile insulation rope that disposes on the preliminary leading rope traction ropeway carrying-rope 6 to make endless rope uses.
3. utilize endless rope that a ropeway carrying-rope 6 is drawn to opposite side ropeway carrying-rope ground anchor point 14 and is tightened up anchoring by a side ropeway carrying-rope ground anchor point 10.Apply tail tension force for ropeway carrying-rope 6 with braking system during traction, avoid ropeway carrying-rope 6 to drop on and crossed on the ground wire of thing 11.
The ropeway carrying-rope 6 of every phase and danish seine Rope Shop establish finish after, at newly-built line steel tower block device 7 assembling places are set for 1 time.After ground assembles block device 7, by the ground staff block device 7 has been divided into groups to winch to the below of gate beam 2, block device 7 is installed on the ropeway carrying-rope 6.Be connected with block device 7 head ends with the danish seine rope, progressively connect progressively traction.Simultaneously the danish seine rope of block device 7 afterbodys should be suitably tension force in addition.On the ground of crossing over another newly-built line steel tower of shelves end, start pull rope, block device 7 is launched above being crossed over thing 11.When block device 7 evenly covered by leap thing 11 tops, manpower tightened up two ends danish seine rope, and it is anchored at ground anchor point 10,14 places.Can carry out follow-up line construction then.
The present invention has substituted the method that crossing frame is crossed over construction of in the past setting up, and has solved transmission line well and has crossed over the technical barrier of construction.Not only improved efficiency of construction, the more important thing is and improved safety of construction.Economic and social benefit is very remarkable.
Claims (6)
1. super a, extra high voltage line construction does not have the crossing frame crossing method, it is characterized in that: adopt newly-built line steel tower (1) as the terminal cross support body, cross over shelves iron towers (1) at newly-built circuit and go up installation gate beam (2) connects facility and ropeway carrying-rope (6) as the terminal of block device (7) jockey; In being crossed over thing (11) top safe distance, block device (7) is installed again; Cross over construction in block device (7) top erecting power lines then;
Concrete steps are:
(1) according to crossing over shelves and the design parameter of newly-built line steel tower (1) and the configured length that the site contour condition is determined pattern, length and the ropeway carrying-rope (6) of ropeway carrying-rope (6), block device (7), gate beam (2);
(2) carry out simulation modeling, calculate ropeway carrying-rope (6) sag and specification and the sag of ropeway carrying-rope (6) under zero load and unwrapping wire state in the state of accident under the corresponding span condition, determine ropeway carrying-rope (6) and the safe distance of being crossed over thing (11);
(3) determine the position that is provided with of gate beam (2);
(4) complete unit is installed, is comprised gate beam (2), ropeway carrying-rope (6), block device (7), carry out circuit and cross over construction.
2. super, extra high voltage line construction according to claim 1 does not have the crossing frame crossing method, it is characterized in that: in step (1), and ropeway carrying-rope (6) support block device (7), and be anchored in ground anchor point (10,14) after straining by pulley (4,5).
3. super, extra high voltage line construction according to claim 1 does not have the crossing frame crossing method, it is characterized in that: in step (2), ropeway carrying-rope (6) with crossed over thing (11) safe distance definite method be: the state equation of joining rack ceases to be busy rope, find the solution simple cubic equation, calculate the sag of ropeway carrying-rope (6) under various states, determine ropeway carrying-rope (6) and the safe distance of being crossed over thing (11) with ropeway carrying-rope (6) sag with to the setting numerical value that the clear distance of being crossed over thing (11) requires.
4. super, extra high voltage line construction according to claim 1 does not have the crossing frame crossing method, it is characterized in that: in step (3), gate beam (2) be suspended from the lead design attitude select below 4-6 rice.
5. super, extra high voltage line construction according to claim 1 does not have the crossing frame crossing method, and it is characterized in that: in step (4), gate beam (2) is hung on iron tower (1) by suspension cable (3), goes up installation pulley (4,5) at gate beam (2).
6. super, extra high voltage line construction according to claim 1 does not have the crossing frame crossing method, it is characterized in that: in step (4), the below of block device (7) having been divided into groups to winch to gate beam (2), be installed on the ropeway carrying-rope (6), start the danish seine rope, block device (7) is launched being crossed over thing (11) top, tighten up two ends danish seine rope, and it is anchored at ground anchor point (10,14) locates.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100793879A CN101442194A (en) | 2008-09-11 | 2008-09-11 | Spanning method for ultra, extra high voltage line construction without crossover frame |
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| CNA2008100793879A CN101442194A (en) | 2008-09-11 | 2008-09-11 | Spanning method for ultra, extra high voltage line construction without crossover frame |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101697403B (en) * | 2009-10-23 | 2011-07-20 | 江苏省电力公司句容市供电公司 | Construction method for spreading lead wire and earth wire in transmission line |
| CN102412527A (en) * | 2011-12-02 | 2012-04-11 | 河南省电力公司南阳供电公司 | Controllable lifting live crossover device and construction method thereof |
| CN101728801B (en) * | 2009-12-15 | 2012-06-27 | 湖北省输变电工程公司 | Lead unfolding process |
| CN102611057A (en) * | 2012-03-16 | 2012-07-25 | 山东电力集团公司枣庄供电公司 | Crossing mesh |
| CN102738732A (en) * | 2011-04-08 | 2012-10-17 | 上海市电力公司 | Construction method for 500kV line to span highly intensive high-voltage live lines |
| CN102738729A (en) * | 2011-04-08 | 2012-10-17 | 上海市电力公司 | Application method for spanning frame to simultaneously span highly intensive high-voltage transmission lines |
| CN103944105A (en) * | 2014-05-06 | 2014-07-23 | 国网上海市电力公司 | Pulley hanging point spanning frame with four circuits on same tower |
| CN104393524A (en) * | 2014-09-16 | 2015-03-04 | 国家电网公司 | Construction method for preventing erection of crossing frame by using overhead ground wire to perform pulley block hanging operation |
| CN104909312A (en) * | 2015-06-02 | 2015-09-16 | 三一汽车起重机械有限公司 | Electric operating vehicle |
| CN105790156A (en) * | 2016-04-11 | 2016-07-20 | 天津送变电工程公司 | Transmission line construction new net-blocking construction method |
| CN102412527B (en) * | 2011-12-02 | 2016-11-30 | 国网河南省电力公司南阳供电公司 | Controllable lifting live crossover device and construction method thereof |
| CN108736377A (en) * | 2018-08-16 | 2018-11-02 | 国网湖南省电力有限公司 | A kind of payingoff construction spanning the transmission line road lives across system and its application process |
| CN109145488A (en) * | 2018-09-07 | 2019-01-04 | 四川电力设计咨询有限责任公司 | Carrying Suo Shouli and sag computing method for line level crossing construction |
| CN109494621A (en) * | 2018-12-29 | 2019-03-19 | 国家电网有限公司 | Transmission line of electricity block device |
| CN111145349A (en) * | 2019-12-23 | 2020-05-12 | 国网陕西省电力公司建设分公司 | Power transmission line crossing construction scheme checking and visualization method based on three-dimensional GIS |
| CN111682479A (en) * | 2020-07-02 | 2020-09-18 | 国核电力规划设计研究院有限公司 | Single-loop power transmission line iron tower and power transmission line tower system |
| CN111682483A (en) * | 2020-07-02 | 2020-09-18 | 国核电力规划设计研究院有限公司 | Transmission line drilling tower and transmission line tower system |
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| CN113594966A (en) * | 2021-07-19 | 2021-11-02 | 广东电网能源发展有限公司 | Overhead transmission line tightening construction design method and device, terminal and storage medium |
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|---|---|---|---|---|
| CN101697403B (en) * | 2009-10-23 | 2011-07-20 | 江苏省电力公司句容市供电公司 | Construction method for spreading lead wire and earth wire in transmission line |
| CN101728801B (en) * | 2009-12-15 | 2012-06-27 | 湖北省输变电工程公司 | Lead unfolding process |
| CN102738732A (en) * | 2011-04-08 | 2012-10-17 | 上海市电力公司 | Construction method for 500kV line to span highly intensive high-voltage live lines |
| CN102738729A (en) * | 2011-04-08 | 2012-10-17 | 上海市电力公司 | Application method for spanning frame to simultaneously span highly intensive high-voltage transmission lines |
| CN102412527A (en) * | 2011-12-02 | 2012-04-11 | 河南省电力公司南阳供电公司 | Controllable lifting live crossover device and construction method thereof |
| CN102412527B (en) * | 2011-12-02 | 2016-11-30 | 国网河南省电力公司南阳供电公司 | Controllable lifting live crossover device and construction method thereof |
| CN102611057A (en) * | 2012-03-16 | 2012-07-25 | 山东电力集团公司枣庄供电公司 | Crossing mesh |
| CN103944105A (en) * | 2014-05-06 | 2014-07-23 | 国网上海市电力公司 | Pulley hanging point spanning frame with four circuits on same tower |
| CN104393524A (en) * | 2014-09-16 | 2015-03-04 | 国家电网公司 | Construction method for preventing erection of crossing frame by using overhead ground wire to perform pulley block hanging operation |
| CN104393524B (en) * | 2014-09-16 | 2017-03-15 | 国家电网公司 | Avoid setting up using aerial earth wire extension pulley group job and cross over frame construction method |
| CN104909312A (en) * | 2015-06-02 | 2015-09-16 | 三一汽车起重机械有限公司 | Electric operating vehicle |
| CN105790156A (en) * | 2016-04-11 | 2016-07-20 | 天津送变电工程公司 | Transmission line construction new net-blocking construction method |
| CN108736377A (en) * | 2018-08-16 | 2018-11-02 | 国网湖南省电力有限公司 | A kind of payingoff construction spanning the transmission line road lives across system and its application process |
| CN109145488A (en) * | 2018-09-07 | 2019-01-04 | 四川电力设计咨询有限责任公司 | Carrying Suo Shouli and sag computing method for line level crossing construction |
| CN109145488B (en) * | 2018-09-07 | 2022-07-15 | 四川电力设计咨询有限责任公司 | Bearing cable stress and sag calculation method for crossing stringing construction |
| CN109494621A (en) * | 2018-12-29 | 2019-03-19 | 国家电网有限公司 | Transmission line of electricity block device |
| CN109494621B (en) * | 2018-12-29 | 2020-05-15 | 国家电网有限公司 | Power transmission line blocking device |
| CN111145349A (en) * | 2019-12-23 | 2020-05-12 | 国网陕西省电力公司建设分公司 | Power transmission line crossing construction scheme checking and visualization method based on three-dimensional GIS |
| CN111145349B (en) * | 2019-12-23 | 2023-03-24 | 国网陕西省电力公司建设分公司 | Power transmission line crossing construction scheme checking and visualization method based on three-dimensional GIS |
| CN111682479A (en) * | 2020-07-02 | 2020-09-18 | 国核电力规划设计研究院有限公司 | Single-loop power transmission line iron tower and power transmission line tower system |
| CN111682483A (en) * | 2020-07-02 | 2020-09-18 | 国核电力规划设计研究院有限公司 | Transmission line drilling tower and transmission line tower system |
| CN113131402A (en) * | 2021-05-26 | 2021-07-16 | 内蒙古送变电有限责任公司 | No-crossing-frame uninterrupted stringing construction method |
| CN113131402B (en) * | 2021-05-26 | 2022-04-08 | 内蒙古送变电有限责任公司 | No-crossing-frame uninterrupted stringing construction method |
| CN113594966A (en) * | 2021-07-19 | 2021-11-02 | 广东电网能源发展有限公司 | Overhead transmission line tightening construction design method and device, terminal and storage medium |
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Open date: 20090527 |