CN202500372U - High strength annular portion prestressed concrete electric pole - Google Patents
High strength annular portion prestressed concrete electric pole Download PDFInfo
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- CN202500372U CN202500372U CN2011205577939U CN201120557793U CN202500372U CN 202500372 U CN202500372 U CN 202500372U CN 2011205577939 U CN2011205577939 U CN 2011205577939U CN 201120557793 U CN201120557793 U CN 201120557793U CN 202500372 U CN202500372 U CN 202500372U
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Abstract
The utility model relates to a high strength annular portion prestressed concrete electric pole. The overall length of the electric pole length is 10m, 13m or 15m. A space between eject rings (1) is between 30cm to 60cm with a deviation of 20mm more or 20mm less. A space between spiral ribs (5) is between 40cm to 70cm with a deviation of 10mm more or 10mm less. A net distance between a prestressed steel bar (2) and a non prestressed steel bar (3) is larger than or equal to 30 mm with a deviation of 5mm more or 5mm less. The high strength annular portion prestressed concrete electric pole of the utility model has high crack resistance and high tensile strength, and is convenient in manufacturing and transportation.
Description
Technical field
The utility model relates to a kind of electric pole, particularly, relates to a kind of high strength annular partially prestressed concrete electric pole, is applicable to that mainly overhead distribution is with 10m, 13m, 15m high strength annular partially prestressed concrete electric pole.Said partially prestressed concrete electric pole is for the fully prestressed concrete electric pole, and partially prestressed concrete electric pole allows electric pole to produce tensile stress or allows member conditional fine cracks to occur.
Background technology
In recent years, along with the fast development of China's power industry, the town and country industrial and agricultural development is also increasingly high to the requirement of electric line, because improving constantly of electric pressure and flux proposed new higher technical requirements to the concurrent product.Selection to the bar type in built on stilts electric line design generally is divided into three kinds: iron tower, steel pipe pole and concurrent.Yet because the corrosion resistance of iron tower and steel pipe pole is relatively poor, cost is high, application life is short, floor space is big, installation procedure is loaded down with trivial details, the construction period is long, causes similar steel work electric pole progressively to be eliminated by market, concurrent progressively receives user's favor.
In recent years, along with the carrying out of China's upgrade of rural power grids and mobile communication construction, the production of annular concrete electric pole and application had obtained swift and violent development, and many electric poles manufacturing enterprise has all been newly set up in various places.Yet in these manufacturing enterprises, most production scales are less, be simply equipped, and the technology imperfection, the existing quality problems of the concurrent of producing are often visible.
In order to promote the technological progress of concrete and cement products industry, encourage technological innovation, China has issued " concrete and the cement products technical progress of industry guide (2009) " formulated by Chinese concrete and cement products association.Wherein stress market-oriented; Give priority to the cement products of high (high-strength, senior engineer presses, high-durability), big (heavy caliber, big specification, big moment of flexure), new (building material and goods), special (specific function, specific use, special requirement); Like prestressed high-strength concrete pile, high strength annular partially prestressed concrete electric pole for example.
Partially prestressed concrete electric pole is for the fully prestressed concrete electric pole.The fully prestressed concrete electric pole applies prestressed degree, be with structure under proof load, tensile stress does not appear in edge, electric pole tensile region; Partially prestressed concrete electric pole then allows electric pole to produce tensile stress or allows member conditional fine cracks to occur.
Wherein, a major criterion of check prestressed concrete electric pole intensity is a cracking moment.Said cracking check moment of flexure is claimed the crack moment of flexure again, promptly works as member and under state of decompression, continues to load, and the section lower edge tensile stress occurs and concrete does not ftracture, and this state is the partially prestressed concrete class A of geometric unit.Then, make the concrete stress tensile strength that reaches capacity in tensile region make and stress state be the cracking resistance ultimate limit state that the load moment of flexure of this moment just becomes cracking (crack) moment of flexure.To sum up, after state of decompression occurs, pull concrete stress state; Just the same as ordinary reinforced concrete; But because the cracking moment of prestressed concrete, however same cross section, with the big press-bending square that disappears of cracking moment of the ordinary reinforced concrete of material, this has explained the superiority of prestressed concrete electric pole; Be under the outer load effect, can postpone the appearance in concurrent crack greatly.Wherein, class A of geometric unit, the concurrent that promptly tensile stress of member control interface tight side edge is limited.Therefore, the cracking of concurrent check moment of flexure is high more, shows that the intensity of concurrent is high more, and the probability that the crack occurs is more little.
In addition, calculate through correlation theory, select the electric pole of same tapering and concrete strength for use, its tip directly doubles, and then the bending resistance square load of electric pole will increase 4.8 times.So after having confirmed bar segment standard moment of flexure data; Need original electric pole tip is directly changed accordingly, but tip footpath can not too much increase when design, because electric pole is except satisfying function and structural strength; Also need be manufactured, the restriction of each side condition such as transportation; Need centrifugal forming like electric pole, the excessive tip directly needs the punching block of more powerful centrifuge and big specification, needs lifting appliance of adjustment transportation usefulness or the like.Therefore, be to want many-sided factors such as compages are stressed, the manufacturing, transportation to consider, and carry out repeated calculation, thereby confirm the preferred plan of high strength annular partially prestressed concrete structure and length producing prestressed concrete electric pole.
For drawing above-mentioned preferred plan, the following technical literature of domestic existence:
Application number: 200710027089.0, title: prestressed concrete electric pole and production technology thereof mainly are applicable to the electric pole of following size: Φ 190 * 18m; Φ 230 * 18m, Φ 310 * 18m, Φ 350 * 18m; Φ 230 * 15m, Φ 190 * 12m, Φ 190 * 15m; Φ 350 * 12m makes the highest moment of flexure value of said electric pole improve a lot than national standard.Yet it is in the electric pole of the following length of 15m, and tip footpath maximum value is merely Φ 350mm, and mainly is applicable to the concurrent that 12～18m is long.Though its electric pole that provides has higher moment of flexure value, but can not meet the requirement of mechanical properties such as high intensity pole pair cracking resistance, crack width, bearing capacity check moment of flexure and amount of deflection check.
The utility model content
For solving the problem of above-mentioned existence, the purpose of the utility model is to provide a kind of high strength annular partially prestressed concrete electric pole, and said electric pole has high cracking resistance and high-tensile, and manufacturing, convenient transport.
For achieving the above object, the utility model adopts following technical scheme:
A kind of high strength annular partially prestressed concrete electric pole; Said electric pole entire length is 10m, 13m or 15m, and the inside concrete of said electric pole is provided with the longitudinal stress reinforcing bar, and said longitudinal stress reinforcing bar comprises prestressed reinforcement and nonprestressed reinforcement; Said prestressed reinforcement and nonprestressed reinforcement be arranged alternate at interval; Said longitudinal stress reinforcing bar inboard is provided with the upright circle of frame, and said longitudinal stress reinforcing bar arranged outside has spiral bar, it is characterized in that:
Spacing is between 30～60cm between said the upright circle, and the deviation between said upright circle spacing is in that (20mm is 20mm) in the scope; Spacing is between 40～70cm between the said spiral bar; Between the said spiral bar spacing deviation (10mm, 10mm) in the scope, the clear distance between said prestressed reinforcement and the nonprestressed reinforcement is greater than or equal to 30mm; The deviation of the clear distance between said prestressed reinforcement and the nonprestressed reinforcement is in that (5mm is 5mm) in the scope.
According to a kind of high strength annular partially prestressed concrete electric pole that the utility model provided, employing be, the diameter of said longitudinal stress reinforcing bar is less than or equal to 2/5 of wall thickness, the radical of said nonprestressed reinforcement is more than 6.
According to a kind of high strength annular partially prestressed concrete electric pole that the utility model provided; What adopt is; Said electric pole integral body is tapered rod, and tapering is 1: 75, and said electric pole adopts the segmentation manufacturing; Connect through steel plate ring between every section electric pole, said steel plate ring is connected with the nonprestressed reinforcement end through arc welding.
According to a kind of high strength annular partially prestressed concrete electric pole that the utility model provided, employing be, said longitudinal stress reinforcing bar has clean topping, the thickness of said clean topping is greater than or equal to 15mm.
According to a kind of high strength annular partially prestressed concrete electric pole that the utility model provided, employing be that said prestressed reinforcement is a steel wires for prestressed concrete.
According to a kind of high strength annular partially prestressed concrete electric pole that the utility model provided, employing be that said nonprestressed reinforcement is hot rolled ribbed steel bar or hot calendering round bar.
According to a kind of high strength annular partially prestressed concrete electric pole that the utility model provided, employing be, said upright circle is hot calendering round bar or cold-drawn low-carbon wire, the vertical missing degree of said upright circle is less than or equal to 1/40 of the upright loop diameter of frame.
According to a kind of high strength annular partially prestressed concrete electric pole that the utility model provided; What adopt is; The diameter of said spiral bar is 4～6mm, and said spiral bar is a cold-drawn low-carbon wire, and said spiral bar closely twines 3～5 circles respectively in position, electric pole both ends.
According to a kind of high strength annular partially prestressed concrete electric pole that the utility model provided, employing be that said length is that the tip of electric pole of 10m is directly for Φ 265～275mm; Said length is that the tip of the electric pole of 13m directly is Φ 225～235mm; Said length is that the tip of the electric pole of 15m directly is Φ 300～305mm or Φ 400～405mm.
The beneficial effect of a kind of high strength annular partially prestressed concrete electric pole that the utility model provided is:
A, the hybrid reinforcement through prestressed reinforcement and nonprestressed reinforcement; Prestressed reinforcement is a steel wires for prestressed concrete; Nonprestressed reinforcement is hot rolled ribbed steel bar or hot calendering round bar; And, make said electric pole have good crack resistance and toughness to the accurate control of deviation between the restriction of clear distance between prestressed reinforcement and nonprestressed reinforcement and clear distance, reach the purpose of saving material, reducing production costs simultaneously;
B, through adopting the segmentation manufacturing; Connect through steel plate ring between every section electric pole; Said steel plate ring is connected with the nonprestressed reinforcement end through arc welding; Prestressed reinforcement exposes the outer end position of every section electric pole to carry out heading and handles, and the position after heading handled carries out preservative treatment, makes that said concurrent is easy to make, assembling splicing and transportation;
C, be the concrete of C70, improved effective compressive stress of said electric pole through adopting intensity, the bond stress of reinforcement ratio and prestressed reinforcement, thus the cracking defect of solution electric pole improves its corrosion-resistant, impact resistance;
D, twine the longitudinal stress reinforcing bar through adopting spiral bar, and space deviations between the spiral bar is controlled, make said electric pole internal construction compact, firm more, material is saved more, reduces production costs.
Description of drawings
Fig. 1 is the structural representation of a kind of high strength annular partially prestressed concrete electric pole that the utility model provided.
Among the figure, 1, the upright circle of frame 2, prestressed reinforcement 3, nonprestressed reinforcement 4, concrete 5, spiral bar.
The specific embodiment
Below in conjunction with accompanying drawing to further explaining for a kind of high strength annular partially prestressed concrete electric pole that the utility model provided.
The production procedure of said high strength annular partially prestressed concrete electric pole is following:
(1), with after said prestressed reinforcement 2 and the nonprestressed reinforcement 3 straightening fixed length; Get into the skeleton forming operation: with said prestressed reinforcement 2 and nonprestressed reinforcement 3 at interval, circularize layout; Frame stands and is connected to said prestressed reinforcement 2 and nonprestressed reinforcement 3 inboards in the circle 1, and per in the vertical 30～60cm is provided with a upright circle 1, and said prestressed reinforcement 2 and nonprestressed reinforcement 3 outer felt are around spiral bar 5; Per in the vertical 40～70cm is provided with a spiral bar 5, and netting becomes cage;
Wherein, The diameter of said longitudinal stress reinforcing bar (comprising prestressed reinforcement 2 and nonprestressed reinforcement 3) is less than or equal to 2/5 of wall thickness; The longitudinal stress reinforcing bar has clean topping, and the thickness of said clean topping is greater than or equal to 15mm, and the radical of said nonprestressed reinforcement 3 is more than 6; After prestressed reinforcement 2 blankings, its cutting length relative error should be not more than 1.5/10000 of blanking reinforcing bar length; Said prestressed reinforcement 2 must not have joint; Clear distance should be greater than or equal to 30mm between prestressed reinforcement 2 and the nonprestressed reinforcement 3; Said spiral bar 5 diameters are 4～6mm, and said spiral bar 5 closely twines 3～5 circles respectively in position, electric pole both ends.
Said prestressed reinforcement 2 is a steel wires for prestressed concrete; Said nonprestressed reinforcement 3 is hot rolled ribbed steel bar or hot calendering round bar; Said upright circle 1 is hot calendering round bar or cold-drawn low-carbon wire; Said spiral bar 5 is a cold-drawn low-carbon wire.
And after treating skeleton forming, each scantling should meet following requirement:
A), the deviation of the clear distance between said prestressed reinforcement (2) and the nonprestressed reinforcement (3) is in that (5mm is 5mm) in the scope;
B), between said upright circle 1 space deviations in that (20mm is 20mm) in the scope;
C), between the said spiral bar 5 space deviations in that (10mm, 10mm) in the scope, the vertical missing degree of said upright circle 1 is less than or equal to 1/40 of the upright circle of frame 1 diameter.
(2), concrete stirring preface: sandstone should screen cleaning by process stipulation, and high-strength cement carries out projection electronic weighing, and on request the volume of cement consumption and high efficiency water reducing agent is got into the concrete stirring preface.
Wherein, said cement should adopt portland cement, the Portland cement greater than 52.5MPa, must not use Portland pozzolana cement; Mix the concrete water of system and should use drinking water; The strength grade of concrete 4 is C70, and concrete 4 demoulding strengths are not less than 70% of design label.
(3), the skeleton of moulding is packed in the punching block, then penetration concrete 4, and through centrifugal forming, said high strength annular partially prestressed concrete electric pole is processed in stream curing then.
When electric pole adopts segmentation to make; (not shown between every section electric pole through steel plate ring; Together following) connect, said steel plate ring is through arc welding and the welding of nonprestressed reinforcement 3 ends, and prestressed reinforcement 2 exposes the outer end position of every section electric pole and carries out the heading processing; The load-carrying surface of heading should be in same plane, and the longitudinal stress reinforcing bar heading that exposes should take effective anti-corrosion measure to handle.
Wherein, heading is about to end reinforced jumping-up, as the prestressed reinforcement or the machinery of the anchorage head of reinforcing bar when cold drawn.Usually adopt button head machine to accomplish above-mentioned work.Button head machine has machinery and two kinds of hydraulic pressure.The operating principle of hydraulic pressure button head machine is: when the cylinder pushes anchor clamps clamped reinforcing bar, its heading pressing mold moved forward, and steel bar end is pushed jumping-up, and rear spring pushes back pressing mold, loosens anchor clamps, promptly accomplished heading one time.
The mechanical property of a kind of high strength annular partially prestressed concrete electric pole that the utility model provided is following:
Cracking resistance, crack width, bearing capacity check moment of flexure and amount of deflection check meet the following requirements:
A, partially prestressed concrete electric pole loading to cracking are checked 80% o'clock of moment of flexure, the crack must not occur; When the check of loading to cracking was acted in a play, crack width was less than 0.10mm.When electric pole length was less than or equal to 10m, 13m or 15m, the masthead amount of deflection was less than (L1+L3)/35;
B, electric pole following situation do not occur when loading to bearing capacity check moment of flexure:
A), the tensile region crack width reaches 1.5mm, or tensile reinforcement is broken;
B), pressure zone concrete destruction;
C), amount of deflection is more than or equal to (L1+L3)/10.
Wherein, above-mentioned L1 is a loading point height; L3 is that distance is put in top end to loading.
Wherein, said 10m, 13m or 15m high strength annular partially prestressed concrete electric pole cracking check moment of flexure and cracking check load are as shown in the table:
Said 10m, 13m or 15m high strength annular partially prestressed concrete electric pole presentation quality require shown in the following table:
Said protective layer thickness allowable variation is as shown in the table: (unit is mm in the table)
The specific embodiment of the utility model has more than been described; But it should be understood that; Aforementioned concrete description should not be construed as the qualification to the essence and the scope of the utility model; The various modifications that the one of ordinary skilled in the art makes the foregoing description after reading this manual all belong to the scope that the utility model is protected.
Claims (9)
1. high strength annular partially prestressed concrete electric pole; Said electric pole entire length is 10m, 13m or 15m, and the concrete of said electric pole (4) set inside has the longitudinal stress reinforcing bar, and said longitudinal stress reinforcing bar comprises prestressed reinforcement (2) and nonprestressed reinforcement (3); Said prestressed reinforcement (2) and nonprestressed reinforcement (3) be arranged alternate at interval; Said longitudinal stress reinforcing bar inboard is provided with the upright circle of frame (1), and said longitudinal stress reinforcing bar arranged outside has spiral bar (5), it is characterized in that:
Spacing is between 30～60cm between said the upright circle (1), and the deviation between said upright circle (1) spacing is in that (20mm is 20mm) in the scope; Spacing is between 40～70cm between the said spiral bar (5); Between said spiral bar (5) spacing deviation (10mm, 10mm) in the scope, the clear distance between said prestressed reinforcement (2) and the nonprestressed reinforcement (3) is greater than or equal to 30mm; The deviation of the clear distance between said prestressed reinforcement (2) and the nonprestressed reinforcement (3) is in that (5mm is 5mm) in the scope.
2. a kind of high strength annular partially prestressed concrete electric pole according to claim 1, it is characterized in that: the diameter of said longitudinal stress reinforcing bar is less than or equal to 2/5 of wall thickness, and the radical of said nonprestressed reinforcement (3) is more than 6.
3. a kind of high strength annular partially prestressed concrete electric pole according to claim 1; It is characterized in that: said electric pole is whole to be tapered rod; Tapering is 1: 75; Said electric pole adopts the segmentation manufacturing, connects through steel plate ring between every section electric pole, and said steel plate ring is connected with nonprestressed reinforcement (3) end through arc welding.
4. a kind of high strength annular partially prestressed concrete electric pole according to claim 1 is characterized in that: said longitudinal stress reinforcing bar has clean topping, and the thickness of said clean topping is greater than or equal to 15mm.
5. a kind of high strength annular partially prestressed concrete electric pole according to claim 1 is characterized in that: said prestressed reinforcement (2) is a steel wires for prestressed concrete.
6. a kind of high strength annular partially prestressed concrete electric pole according to claim 1 is characterized in that: said nonprestressed reinforcement (3) is hot rolled ribbed steel bar or hot calendering round bar.
7. a kind of high strength annular partially prestressed concrete electric pole according to claim 1; It is characterized in that: said upright circle (1) is hot calendering round bar or cold-drawn low-carbon wire, and the vertical missing degree of said upright circle (1) is less than or equal to 1/40 of the upright circle of frame (1) diameter.
8. a kind of high strength annular partially prestressed concrete electric pole according to claim 1; It is characterized in that: the diameter of said spiral bar (5) is 4～6mm; Said spiral bar (5) is a cold-drawn low-carbon wire, and said spiral bar (5) closely twines 3～5 circles respectively in position, electric pole both ends.
9. a kind of high strength annular partially prestressed concrete electric pole according to claim 1 is characterized in that: said length is that the tip of the electric pole of 10m directly is Φ 265～275mm; Said length is that the tip of the electric pole of 13m directly is Φ 225～235mm; Said length is that the tip of the electric pole of 15m directly is Φ 300～305mm or Φ 400～405mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205577939U CN202500372U (en) | 2011-12-27 | 2011-12-27 | High strength annular portion prestressed concrete electric pole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205577939U CN202500372U (en) | 2011-12-27 | 2011-12-27 | High strength annular portion prestressed concrete electric pole |
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| Publication Number | Publication Date |
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| CN202500372U true CN202500372U (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011205577939U Expired - Fee Related CN202500372U (en) | 2011-12-27 | 2011-12-27 | High strength annular portion prestressed concrete electric pole |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102528924A (en) * | 2011-12-27 | 2012-07-04 | 上海电力器材有限公司 | High-strength annular partially prestressed concrete pole and production method thereof |
| CN103541577A (en) * | 2013-10-18 | 2014-01-29 | 六安明诚水泥制品有限责任公司 | Method for fixing electric pole ends without releasing partial prestress |
-
2011
- 2011-12-27 CN CN2011205577939U patent/CN202500372U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102528924A (en) * | 2011-12-27 | 2012-07-04 | 上海电力器材有限公司 | High-strength annular partially prestressed concrete pole and production method thereof |
| CN103541577A (en) * | 2013-10-18 | 2014-01-29 | 六安明诚水泥制品有限责任公司 | Method for fixing electric pole ends without releasing partial prestress |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121024 Termination date: 20191227 |