CN86203751U - Prestress concrete cable tower - Google Patents
Prestress concrete cable tower Download PDFInfo
- Publication number
- CN86203751U CN86203751U CN 86203751 CN86203751U CN86203751U CN 86203751 U CN86203751 U CN 86203751U CN 86203751 CN86203751 CN 86203751 CN 86203751 U CN86203751 U CN 86203751U CN 86203751 U CN86203751 U CN 86203751U
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- CN
- China
- Prior art keywords
- electric pole
- prestressed concrete
- steel
- concrete
- high voltage
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a prestressed concrete cable tower which is a high voltage or ultrahigh voltage power transmission tower formed by pre-stretching type prestressed concrete poles. A reinforcing cage shaped before hand is arranged in a steel mold, high-strength concrete is filled; a prestressed concrete pole is formed by stretching steel reinforcement through centrifugal shaping and steam curing stripping process. The prestressed concrete pole is used to make a high voltage or extra high voltage network cable tower; the steel is saved and the construction cost is decreased. The connection method of the poles are simple and reliable; the length and diameter of the poles are different.
Description
The utility model belongs to high pressure or extra high voltage network device.
Power industry 220KV(comprises 220KV at present) following power transmission sequence, adopt Circular reinforced concrete pole and Circular prestressed concrete pole usually.The 330KV circuit also once adopted Circular prestressed concrete pole.But because prestressed concrete electric pole easily produces longitudinal crack, concrete grade is low, and 400kg/cm is only arranged
2, influence making full use of of high tensile steel wire performance.Electric pole weight is big, and transportation inconvenience fails to apply.
The purpose of this utility model is intended to promote the solution of the problems referred to above, produces a kind of high-strength prestressed concurrent, is applicable to high pressure or extra high voltage network.
Task of the present utility model is finished as follows, the cage of reinforcement of moulding in advance is placed in the punching block, the concrete mixture that forms is stirred in cast by the high-strength concrete design mixture proportion, tension reinforcing steel bar applies prestressing force then, through the centrifuge centrifugal forming, after the stream curing demoulding, prestressed concrete electric pole has just been made.
The used high-strength concrete design mixture proportion (calculating by the absolute volume method) of the utility model is:
Cement 450～600kg/M
3
Sand coarse aggregate ratio 0.27～0.35
Water/binder ratio 0.28～0.36
Water reducing agent (accounting for cement consumption) 0.5～2.0%
For the technology that simplifies the operation, make things convenient for site operation, this match ratio can be mixed a kind of water reducing agent of powdery.Concrete crushing strength R according to above-mentioned design mixture proportion making
28=800kg/cm
2To 1000kg/cm
2
The utility model adopts the pre-tensioned prestressing method, utilizes the centrifuge centrifugal forming, and its centrifuge speed is 300～1000 rev/mins.Conservation system is divided into: a maintenance, its temperature are 60 ℃～80 ℃, and curing time is 5～9 hours; The secondary maintenance can be adopted steam curing at high pressure, and its curing temperature is 180 ℃～200 ℃, and the time is 5～8 hours, also can adopt curing in water, and temperature is 20 ℃～25 ℃, and the time is 12～16 days.Two kinds of methods can get a desired effect equally.According to the manufacture method of above-mentioned prestressed concrete electric pole, can produce the series of products of prestressed concrete electric pole, the diameter D of its electric pole is 300 millimeters to 1500 millimeters, length L is 6 meters to 14 meters, to be applicable to the needs of different engineerings.
Prestressed concrete electric pole provided by the utility model, the concrete grade height, the longitudinal crack of electric pole is resolved.Under the condition of identical stress, littler than current standard electric pole size, weight is light.Therefore, be not only applicable to the shaft tower of the following ultra-high-tension power transmission line of 330KV, be applicable to the shaft tower of 500KV, 750KV extra high voltage network simultaneously yet.According to the designing requirement of transmission tower, the electric pole that can produce different-diameter, different length constitutes the shaft tower of the form that requires.
Fig. 1 is the constructional drawing of prestressed concrete electric pole.(1) prestressed concrete electric pole among the figure; (2) tension reinforcing steel bar; (3) spiral stirrup; (4) anchor rod; (5) steel hoop; (6) anchor disc of steel hoop.
Fig. 2 (a) is that the joint construction figure of electric pole (1) and steel hoop (5): Fig. 2 (b) is the amplification constructional drawing of the reservation groove (7) of anchor disc for the joint construction figure of steel hoop (5) with anchor rod: Fig. 2 (c).
Fig. 3 is the transmission tower constructional drawing that constitutes with prestressed concrete electric pole.(8) shaft tower column among the figure; (9) lead cross-arm; (10) bridging; (11) steel strand traction.
Below in conjunction with accompanying drawing the utility model is described in further detail:
Prestressed concrete electric pole according to the utility model manufacturing, comprise that one group is cast in tension reinforcing steel bar in the concrete (2) and one group in order to fixing electric pole (1) anchor rod (4) with steel hoop (5), this anchor rod is evenly distributed on two terminations of electric pole (1), its length is 40 centimetres, diameter is 12 millimeters, it is welded together admittedly that the anchor disc (6) of it and steel hoop (4) is that electricity consumption welds, form an integral body, tension reinforcing steel bar (2) adopts the heading tension mode to fix with anchor disc (6).In order to make electric pole (1) end local cracks not take place bearing under the excessive shaft pressuring load situation, in electric pole (1) end along L
2In the length range, encrypt spiral stirrup (3), along with tension reinforcing steel bar (2) diameter overstriking, the also corresponding overstriking of the diameter of spiral stirrup (3).According to the prestressed concrete electric pole of the utility model manufacturing, can be suitable for the length of the required electric pole of different engineering specifications at the scene with the electric welding splicing.Electric pole and being connected of electric pole are to rely on the position of reservation groove (7) of anchor disc (6) to carry out electric welding, scolder fills up the reservation groove (7) of anchor disc (6), brush special-purpose inhibitor then, in case in the corrosion of ultra-hostile environment (UHE), weld strength is greater than the intensity of electric pole itself, and the practical experience proof is safe and reliable with this welding method.
In addition, the anti-impact force of the prestressed concrete electric pole of producing for the above-mentioned manufacture method of test basis and bear wind load is done following experiment in test room.With three diameter D=500mm, length L=8m, concrete design compressive strength 800kg/cm
2Prestressed concrete electric pole, do bending property test.Its result of the test and calculated value compare, and the cracking moment calculated value is according to the TJ10-74 modular formula:
M
f＝（σ
hⅡ＋γR
s L）W。
Calculate and get.The ultimate bending moment calculated value is according to the TJ10-74 modular formula:
M
p＝［R
WA (r
1+r
2)/2 +(R
S y+σ
1 ya)A
yr
y］ (sinα)/(π)
Calculate and get.Experiment value and theoretical value relatively list in table 1.(table vides infra)
This shows that the calculated value of ultimate bending moment and test value are very approaching.Because prestressed concrete electric pole mainly is used as the shaft tower of high pressure or extra high voltage network, the axial load carrying capacity of electric pole own is one of its important performance, manufacturing process for the check electric pole, in test room, utilize three diameter D=500mm equally, length L=3.5m, concrete design compressive strength is 800kg/cm
2, do the axial load carrying capacity test of electric pole.Its result of the test rupture load is 800 tons.The supporting capacity calculated value is according to the TJ10-74 modular formula:
N
P=φ (RaA+ σ ' yaAy ')=798.5 tons
As seen, supporting capacity calculated value and test value extremely are close.Because prestressed concrete electric pole intensity height provided by the utility model, lightweight characteristics, can be according to designing requirement, earlier with prestressed concrete electric pole on the ground electric welding be spliced into the column (8) of shaft tower, integral hoisting then, with the steel bolt lead cross-arm (9) is fixed on the top of shaft tower column (8), between two shaft tower columns (8), adds bridging (10) and use steel strand (11) traction again.
Table 2 is the design mixture proportion of three kinds of high-strength concretes.Table 3 is the concrete data and the size of tension reinforcing steel bar, spiral stirrup, steel hoop, anchor disc and the reservation groove of three kinds of pipe pole diameter.
Claims (1)
1, a kind of with centrifugal forming and steam-cured prestressed concrete electric pole and the electric pole tower that constitutes it is characterized in that:
(1) transmission tower column [8] is made of electric pole [1] electric welding splicing,
(2) diameter of electric pole [1] is 300 millimeters to 1500 millimeters, and length is 6 meters to 14 meters, its concrete crushing strength R
28=800kg/cm
2To 1000kg/cm
2,
(3) electric pole [1] comprises that one group is cast in tension reinforcing steel bar [2] in the concrete and one group in order to fixing electric pole [1] anchor rod [4] with steel hoop,
(4) anchor rod [4] is evenly distributed on two ends of electric pole [1],
(5) lead cross-arm [9] is by the top of steel bolton in column [8],
Add bridging [10] between (6) two columns [8] and draw with steel strand [11].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86203751 CN86203751U (en) | 1986-06-11 | 1986-06-11 | Prestress concrete cable tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86203751 CN86203751U (en) | 1986-06-11 | 1986-06-11 | Prestress concrete cable tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86203751U true CN86203751U (en) | 1987-12-12 |
Family
ID=4806977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86203751 Expired - Lifetime CN86203751U (en) | 1986-06-11 | 1986-06-11 | Prestress concrete cable tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86203751U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023001A (en) * | 2010-11-03 | 2011-04-20 | 河南省电力公司洛阳供电公司 | Method for checking height difference between joints of cross arms for cross arms of dual-column pole tower |
| CN103291110A (en) * | 2013-05-20 | 2013-09-11 | 同济大学 | Electricity transmitting pole with functions of swinging and self-resetting |
| WO2014012344A1 (en) * | 2012-07-19 | 2014-01-23 | 安徽华电工程咨询设计有限公司 | Power transmission tower with three-phase wires in triangle-shaped cross-arm-sharing arrangement |
| CN106272954A (en) * | 2016-08-22 | 2017-01-04 | 福建坚石水泥制品有限公司 | One parts a little draws reinforced concrete pole processing technology |
| CN106437275A (en) * | 2015-08-13 | 2017-02-22 | 中国电力科学研究院 | Electric transmission line iron tower cross arm additional prestress strengthening method |
| CN107762239A (en) * | 2017-11-07 | 2018-03-06 | 广东永基电力器材厂有限公司 | A kind of limit value prestressed concrete electric pole |
-
1986
- 1986-06-11 CN CN 86203751 patent/CN86203751U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023001A (en) * | 2010-11-03 | 2011-04-20 | 河南省电力公司洛阳供电公司 | Method for checking height difference between joints of cross arms for cross arms of dual-column pole tower |
| CN102023001B (en) * | 2010-11-03 | 2015-06-24 | 河南省电力公司洛阳供电公司 | Method for checking height difference between joints of cross arms for cross arms of dual-column pole tower |
| WO2014012344A1 (en) * | 2012-07-19 | 2014-01-23 | 安徽华电工程咨询设计有限公司 | Power transmission tower with three-phase wires in triangle-shaped cross-arm-sharing arrangement |
| CN103291110A (en) * | 2013-05-20 | 2013-09-11 | 同济大学 | Electricity transmitting pole with functions of swinging and self-resetting |
| CN103291110B (en) * | 2013-05-20 | 2015-12-23 | 同济大学 | A kind of have the power transmission rod waved with Self-resetting function |
| CN106437275A (en) * | 2015-08-13 | 2017-02-22 | 中国电力科学研究院 | Electric transmission line iron tower cross arm additional prestress strengthening method |
| CN106437275B (en) * | 2015-08-13 | 2019-03-05 | 中国电力科学研究院 | A kind of additional prestress strengthening method of iron tower of power transmission line cross-arm |
| CN106272954A (en) * | 2016-08-22 | 2017-01-04 | 福建坚石水泥制品有限公司 | One parts a little draws reinforced concrete pole processing technology |
| CN107762239A (en) * | 2017-11-07 | 2018-03-06 | 广东永基电力器材厂有限公司 | A kind of limit value prestressed concrete electric pole |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |