CN103469965A - Concrete beam and production method thereof - Google Patents
Concrete beam and production method thereof Download PDFInfo
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- CN103469965A CN103469965A CN2013104194054A CN201310419405A CN103469965A CN 103469965 A CN103469965 A CN 103469965A CN 2013104194054 A CN2013104194054 A CN 2013104194054A CN 201310419405 A CN201310419405 A CN 201310419405A CN 103469965 A CN103469965 A CN 103469965A
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Abstract
The invention relates to a concrete beam and a production method of the concrete beam. According to different load-carrying positions, the concrete beam comprises reinforcing cages, prestressed concrete bars and concrete packaging the peripheries of the reinforcing cages and the prestressed concrete bars, wherein the reinforcing cages comprise upper steel bar layers and lower steel bar layers, and the prestressed concrete bars are located on the upper parts and lower parts of the upper steel bar layers or are parallel with the upper steel bar layers and are continuously or discontinuously placed. The production method comprises the steps of (1) distributing prestressed steel bars on a stretch-draw operation table according to the required standards and number, and applying a prestressing force equal to 70% of the tensile strength to the prestressed steel bars; (2) putting a mold on the prestressed steel bars, and injecting C60 (or above) high-strength and high-performance concrete into the mold for carrying out casting forming; (3) releasing the prestressing force applied in the step (1) after reaching a curing period of the concrete, and carrying out length cutting according to the required dimensions. The concrete beam and the production method of the concrete beam have the advantages that the crack developing is prevented, the strength is high, the reinforced concrete resources are saved, the cost is low, the construction is simple and convenient, and the like.
Description
Technical field
The present invention relates to a kind of concrete component, specifically a kind of concrete beam and preparation method thereof.
Background technology
At present, prestressed concrete member is applied in the building structure of bridge and large span mostly, be applied in common building construction less, Chang Yiwu bonding prestress form application, the stretch-draw anchor point that main cause is prestressed reinforcement can't arrange, difficulty of construction is large; Apply in addition the restriction that high strength cast iron often is subject to the crack width of existing regulation and stipulation in common building construction, can't large-area application and popularization, force area, concrete beam bearing top particularly, need solve the crack developing problem by the consumption that increases plain bars when design, cause increasing considerably of concrete and amount of reinforcement, the shortcomings such as construction casting difficulty.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, and a kind of concrete beam and preparation method thereof is provided, have the crack developing of prevention, intensity high, save the advantages such as reinforced concrete soil resource, cost are low, easy construction.
The technical scheme that the present invention solves above technical problem is:
A kind of concrete beam, comprise reinforcing cage, prestressed concrete rod and the concrete that is wrapped in prestressed concrete rod and reinforcing cage surrounding; Reinforcing cage comprises steel bar layer and lower steel bar layer, and the prestressed concrete rod is positioned at top, the bottom or parallel with upper steel bar layer of steel bar layer, and elongated or interruption placement.
The preparation method of concrete beam of the present invention, carry out according to the following steps:
(i) prestressed reinforcement is arranged on the tension operation platform by required specification and quantity, and prestressed reinforcement is applied to the prestressing force of tensile strength 70%;
(ii) mould is placed on prestressed reinforcement, injects the above high-strength high-performance concrete casting of C60 and build up concrete rod in mould;
(iii) reach release steps after concrete curing time (i) in the stretching force of tension operation platform, obtain the prestressed concrete rod, and according to needed size cutting prestressed concrete rod length;
(iv) by step (iii) the rod of the prestressed concrete of well cutting put elongated or be interrupted top, the bottom or parallel with upper steel bar layer be placed on steel bar layer on reinforcing cage, then with concrete casting, build up beam, get final product after reaching concrete curing time.
The technical scheme that the present invention further limits is:
Aforesaid concrete beam, the external surface of prestressed concrete rod is provided with outwardly concrete rib, and concrete rib is the continuous uniform strip of helical form or unconnected interval.Can improve prestressed concrete rod and peripheral concrete bond stress by concrete rib is set, increase the intensity of integrated prestress concrete beam.
Aforesaid prestressed concrete beam, concrete rib becomes 45-86 degree angle with the horizon of prestressed concrete rod length direction.By 45 degree being set to 86 degree angles, the unexpected discovery of applicant can effectively stop crack developing, compare other angle, 45 degree stop crack developing can reach (other angle is generally in 80% left and right) more than 99% to 86 degree angles, have obtained beyond thought technique effect.
Aforesaid concrete beam, reinforcing cage forms with the stirrup that is positioned at following lower steel bar layer and the vertical hoop of upper and lower steel bar layer is connected by being positioned at top upper steel bar layer, upper steel bar layer is comprised of at least two top reinforcementes, each top reinforcement distributes along the member length direction, and the spacing between adjacent top reinforcement is identical; Lower steel bar layer is comprised of at least two lower floor's reinforcing bars, and each lower floor's reinforcing bar distributes along the member length direction, and the spacing between adjacent lower floor reinforcing bar is identical; Stirrup is comprised of at least two reinforcing bars through crooked thin diameter; Top reinforcement and lower floor's reinforcing bar are 600MPa level or the above high-strength building reinforcing bar of 600MPa level, and diameter is 22mm; On composition between each top reinforcement of steel bar layer spacing be 2 times of spacing between each lower floor's reinforcing bar that forms lower steel bar layer.Compared to existing technology, can meet the technical condition of steel bar stress in Code for design of concrete structures or distributing bar by the cloth muscle form of structure that changes reinforcing bar, the results showed, can reduce the consumption 20.13% of reinforcing bar, its bearing capacity is high, crack plain bars member more for building is little, more is conducive to concrete building with shake and smashes, and meets the structure requirement of the minimum steel ratio of the Concrete Structure Design.
Aforesaid concrete beam, the prestressed concrete rod is positioned at the top of reinforcing cage top reinforcement, and is positioned at the position of the span of concrete beam bearing both sides 1/4 beam.Like this, concrete beam intensity is higher, more can stop carrying out of crack.
Aforesaid concrete beam, the prestressed concrete rod is positioned at the parallel position of reinforcing cage top reinforcement, and is positioned at the position of the span of concrete beam bearing both sides 1/4 beam.Like this, concrete beam intensity is higher, more can stop carrying out of crack.
Aforesaid concrete beam, the prestressed concrete rod is positioned at the bottom of reinforcing cage top reinforcement, and is positioned at the position of the span of concrete beam bearing both sides 1/4 beam.Like this, concrete beam intensity is higher, more can stop carrying out of crack.
Advantage of the present invention is: the concrete rod that (1) adopts prestressed reinforcement to make, its size, length, shape can be regulated by mould arbitrarily, this prestressed concrete rod external surface is convenient to and the bonding interlock of ordinary concrete with helical form, has that cementability is strong, operation is made simple, easy to operate, easy construction advantage; (2) prestressed concrete above high-strength high-performance concreting of C60 for rod, concrete crushing strength is high, plays the compressing concrete after prestressed reinforcement stretch-draw, is conducive to crack preventing and carries out and extension, has advantages of that flexing resistance is strong; (3) utilize the prestressed concrete rod as the normal concrete beams prepressing components, can effectively stop the concrete crack developing of continuous beam carrying stress surface, reduce the consumption of concrete and reinforcing bar, material-saving, more than 40%, has material-saving, stops the advantages such as crack developing, easy construction.
The accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1 concrete beam.
Fig. 2 is the structural representation of prestressed concrete rod of the present invention.
Fig. 3 is the lateral view of Fig. 2.
Fig. 4 is the structural representation of the embodiment of the present invention 2 concrete beam.
The structural representation of Fig. 5 embodiment of the present invention 3 concrete beam.
The specific embodiment
The present embodiment is a kind of concrete beam, as Figure 1-3, comprises reinforcing cage 4, prestressed concrete rod and the concrete 2 that is wrapped in prestressed concrete rod and reinforcing cage surrounding; Reinforcing cage 4 comprises steel bar layer and lower steel bar layer, and the prestressed concrete rod is positioned at top and the elongated or interruption placement of steel bar layer.The present embodiment prestressed concrete rod is positioned at the top of reinforcing cage top reinforcement, and is positioned at the position of the span of concrete beam bearing both sides 1/4 beam, and concrete beam intensity is higher, more can stop carrying out of crack.
The prestressed concrete rod comprises at least one prestressed reinforcement 1 and is wrapped in the above high-strength high-performance concrete of C60 of prestressed reinforcement surrounding.Wherein the external surface of prestressed concrete rod is provided with outwardly concrete rib 3, concrete rib is the continuous uniform strip of helical form or unconnected interval, can improve prestressed concrete rod and peripheral concrete bond stress by concrete rib is set, increase the intensity of monolithic concrete beam.Wherein concrete rib becomes 45-86 degree angle with the horizon of prestressed concrete rod length direction, by 45 degree being set to 86 degree angles, can effectively stop crack developing, compare other angle, this angle stops crack developing can reach (other angle is generally in 80% left and right) more than 99%.
Reinforcing cage 4 forms with the stirrup that is positioned at following lower steel bar layer and the vertical hoop of upper and lower steel bar layer is connected by being positioned at top upper steel bar layer, upper steel bar layer is comprised of at least two top reinforcementes, each top reinforcement distributes along the member length direction, and the spacing between adjacent top reinforcement is identical; Lower steel bar layer is comprised of at least two lower floor's reinforcing bars, and each lower floor's reinforcing bar distributes along the member length direction, and the spacing between adjacent lower floor reinforcing bar is identical; Stirrup is comprised of at least two reinforcing bars through crooked thin diameter; Top reinforcement and lower floor's reinforcing bar are 600MPa level or the above high-strength building reinforcing bar of 600MPa level, and diameter is 22mm; On composition between each top reinforcement of steel bar layer spacing be 2 times of spacing between each lower floor's reinforcing bar that forms lower steel bar layer.Like this, use Φ 22mm600MPa level and above high-strength building steel, and between each top reinforcement of the upper steel bar layer of setting composition, spacing is 2 times of spacing between each lower floor's reinforcing bar of steel bar layer under forming, compared to existing technology, can meet the technical condition of steel bar stress in Code for design of concrete structures or distributing bar by the cloth muscle form of structure that changes reinforcing bar, the results showed, can reduce the consumption 20.13% of reinforcing bar, its bearing capacity is high, crack plain bars member more for building is little, more being conducive to concrete building with shake smashes, meet the structure requirement of the minimum steel ratio of the Concrete Structure Design.
The preparation method of the present embodiment concrete beam, carry out according to the following steps:
(i) prestressed reinforcement 1 is arranged on the tension operation platform by required specification and quantity, and prestressed reinforcement is applied to the prestressing force of tensile strength 70%;
(ii) mould is placed on prestressed reinforcement, in mould, the above high-strength high-performance concrete 3 of injection C60 waters and builds up concrete rod;
(iii) reach release steps after concrete curing time (i) in the stretching force of tension operation platform, obtain the prestressed concrete rod, and according to needed size cutting prestressed concrete rod length;
(iv) by step (iii) the rod of the prestressed concrete of well cutting be placed on the top of reinforcing cage top reinforcement, and be positioned at the position of the span of concrete beam bearing both sides 1/4 beam, then with concrete 2, water and build up beam, reach concrete curing time to get final product.
The present embodiment is a kind of concrete beam, structure as shown in Figure 4, the present embodiment is with the difference of implementing 1, the present embodiment prestressed concrete rod is parallel with the top reinforcement of reinforcing cage 4, and be positioned at the position of the span of concrete beam bearing both sides 1/4 beam, concrete beam intensity is higher, more can stop carrying out of crack.
The preparation method of the present embodiment concrete beam, carry out according to the following steps:
(i) prestressed reinforcement 1 is arranged on the tension operation platform by required specification and quantity, and prestressed reinforcement is applied to the prestressing force of tensile strength 70%;
(ii) mould is placed on prestressed reinforcement, injects the above high-strength high-performance concrete casting of C60 and build up concrete rod in mould;
(iii) reach release steps after concrete curing time (i) in the stretching force of tension operation platform, obtain the prestressed concrete rod, and according to needed size cutting prestressed concrete rod length;
(iv) by step (iii) the rod of the prestressed concrete of well cutting be placed on the position parallel with the top reinforcement of reinforcing cage 4, and be positioned at the position of the span of concrete beam bearing both sides 1/4 beam, then with concrete 2, water and build up beam, reach concrete curing time to get final product.
The present embodiment is a kind of concrete beam, structure as shown in Figure 5, the present embodiment is with the difference of implementing 1, the present embodiment prestressed concrete rod is positioned at the bottom of reinforcing cage top reinforcement, and be positioned at the position of the span of concrete beam bearing both sides 1/4 beam, concrete beam intensity is higher, more can stop carrying out of crack.
The preparation method of the present embodiment concrete beam, carry out according to the following steps:
(i) prestressed reinforcement 1 is arranged on the tension operation platform by required specification and quantity, and prestressed reinforcement is applied to the prestressing force of tensile strength 70%;
(ii) mould is placed on prestressed reinforcement, in mould, the above high-strength high-performance concrete 3 of injection C60 waters and builds up concrete rod;
(iii) reach release steps after concrete curing time (i) in the stretching force of tension operation platform, obtain the prestressed concrete rod, and according to needed size cutting prestressed concrete rod length;
(iv) by step (iii) the rod of the prestressed concrete of well cutting be placed on the bottom of reinforcing cage top reinforcement, and be positioned at the position of the span of concrete beam bearing both sides 1/4 beam, then with concrete 2, water and build up beam, reach concrete curing time to get final product.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (8)
1. a concrete beam, is characterized in that: comprise reinforcing cage, prestressed concrete rod and the concrete that is wrapped in prestressed concrete rod and reinforcing cage surrounding; Described reinforcing cage comprises steel bar layer and lower steel bar layer, and described prestressed concrete rod is positioned at top, the bottom or parallel with upper steel bar layer of described upper steel bar layer, and elongated or interruption placement.
2. concrete beam as claimed in claim 1, it is characterized in that: the external surface of described prestressed concrete rod is provided with outwardly concrete rib, and described concrete rib is the continuous uniform strip of helical form or unconnected interval.
3. prestressed concrete beam as claimed in claim 2 is characterized in that: described concrete rib becomes 45-86 degree angle with the horizon of prestressed concrete rod length direction.
4. concrete beam as claimed in claim 1, it is characterized in that: described reinforcing cage forms with the stirrup that is positioned at following lower steel bar layer and the vertical hoop of upper and lower steel bar layer is connected by being positioned at top upper steel bar layer, described upper steel bar layer is comprised of at least two top reinforcementes, each top reinforcement distributes along the member length direction, and the spacing between adjacent top reinforcement is identical; Described lower steel bar layer is comprised of at least two lower floor's reinforcing bars, and each lower floor's reinforcing bar distributes along the member length direction, and the spacing between adjacent lower floor reinforcing bar is identical; Described stirrup is comprised of at least two reinforcing bars through crooked thin diameter; Described top reinforcement and lower floor's reinforcing bar are 600MPa level or the above high-strength building reinforcing bar of 600MPa level, and diameter is 22mm; On composition between each top reinforcement of steel bar layer spacing be 2 times of spacing between each lower floor's reinforcing bar that forms lower steel bar layer.
5. concrete beam as claimed in claim 1 or 2 or 3 or 4, it is characterized in that: described prestressed concrete rod is positioned at the top of reinforcing cage top reinforcement, and is positioned at the position of the span of concrete beam bearing both sides 1/4 beam.
6. concrete beam as claimed in claim 1 or 2 or 3 or 4, it is characterized in that: described prestressed concrete rod is positioned at the parallel position of reinforcing cage top reinforcement, and is positioned at the position of the span of concrete beam bearing both sides 1/4 beam.
7. concrete beam as claimed in claim 1 or 2 or 3 or 4, it is characterized in that: described prestressed concrete rod is positioned at the bottom of reinforcing cage top reinforcement, and is positioned at the position of the span of concrete beam bearing both sides 1/4 beam.
8. as the preparation method of the described concrete beam of arbitrary claim in claim 1-7, it is characterized in that: carry out according to the following steps:
(i) prestressed reinforcement is arranged on the tension operation platform by required specification and quantity, and prestressed reinforcement is applied to the prestressing force of tensile strength 70%;
(ii) mould is placed on prestressed reinforcement, injects the above high-strength high-performance concrete casting of C60 and build up concrete rod in mould;
(iii) reach release steps after concrete curing time (i) in the stretching force of tension operation platform, obtain the prestressed concrete rod, and according to needed size cutting prestressed concrete rod length;
(iv) by step (iii) the rod of the prestressed concrete of well cutting put elongated or be interrupted top, the bottom or parallel with upper steel bar layer be placed on steel bar layer on reinforcing cage, then with concrete casting, build up beam, get final product after reaching concrete curing time.
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| CN2013104194054A CN103469965A (en) | 2013-09-16 | 2013-09-16 | Concrete beam and production method thereof |
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| CN2013104194054A CN103469965A (en) | 2013-09-16 | 2013-09-16 | Concrete beam and production method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067470A (en) * | 1992-06-09 | 1992-12-30 | 陈武华 | The production method of corrugated, prestressed, reinforced concrete structural member |
| JP2000192661A (en) * | 1998-12-25 | 2000-07-11 | Ohbayashi Corp | Prestress concrete structure |
| CN1696444A (en) * | 2004-05-10 | 2005-11-16 | 邱则有 | Tendon of wrapping mortar on it in advance and bonded in later |
| CN2742063Y (en) * | 2004-08-12 | 2005-11-23 | 吴方伯 | Steel reinforced concrete anti-cracking plate |
| CN2911057Y (en) * | 2006-03-16 | 2007-06-13 | 同济大学 | Concrete beam having partially bond prestressed FRP bars |
| CN201339271Y (en) * | 2008-12-26 | 2009-11-04 | 天津市银龙预应力钢材集团有限公司 | High-strength pre-stress heat-treatment steel bar for high-speed railway track system |
| CN102287029A (en) * | 2011-06-20 | 2011-12-21 | 北京工业大学 | High-strength reinforcement built-in ultra high performance concrete (UHPC) beam member |
-
2013
- 2013-09-16 CN CN2013104194054A patent/CN103469965A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067470A (en) * | 1992-06-09 | 1992-12-30 | 陈武华 | The production method of corrugated, prestressed, reinforced concrete structural member |
| JP2000192661A (en) * | 1998-12-25 | 2000-07-11 | Ohbayashi Corp | Prestress concrete structure |
| CN1696444A (en) * | 2004-05-10 | 2005-11-16 | 邱则有 | Tendon of wrapping mortar on it in advance and bonded in later |
| CN2742063Y (en) * | 2004-08-12 | 2005-11-23 | 吴方伯 | Steel reinforced concrete anti-cracking plate |
| CN2911057Y (en) * | 2006-03-16 | 2007-06-13 | 同济大学 | Concrete beam having partially bond prestressed FRP bars |
| CN201339271Y (en) * | 2008-12-26 | 2009-11-04 | 天津市银龙预应力钢材集团有限公司 | High-strength pre-stress heat-treatment steel bar for high-speed railway track system |
| CN102287029A (en) * | 2011-06-20 | 2011-12-21 | 北京工业大学 | High-strength reinforcement built-in ultra high performance concrete (UHPC) beam member |
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Application publication date: 20131225 |
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