CN107237264B - Prefabricated T-beam secondary-stage prestress steel strand tensioning support and method - Google Patents
Prefabricated T-beam secondary-stage prestress steel strand tensioning support and method Download PDFInfo
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- CN107237264B CN107237264B CN201710452210.8A CN201710452210A CN107237264B CN 107237264 B CN107237264 B CN 107237264B CN 201710452210 A CN201710452210 A CN 201710452210A CN 107237264 B CN107237264 B CN 107237264B
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- tensioning
- steel strand
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- stand
- crossbeam
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention relates to a prefabricated T-shaped beam secondary prestress steel strand tensioning support and a method, which belong to the technical field of bridge construction. The invention has the advantages that the movable support capable of walking on the beam top and suspending the tensioning equipment is designed, the separation of personnel and the equipment is realized, the support and the tensioning equipment are not on the same support, the support and the tensioning equipment can be quickly moved, the labor intensity is reduced, the potential safety hazard is eliminated to the maximum extent, the construction efficiency is improved, the construction period is shortened, the construction cost is reduced, and the economic benefit is improved.
Description
Technical Field
The invention relates to a prefabricated T-beam secondary prestress steel strand tensioning support and a method, belongs to the technical field of bridge construction, and is particularly suitable for constructing a continuous beam bridge by adopting a construction process of a simply supported beam.
Background
In the process of constructing the superstructure of the bridge, a simply-supported-continuous structural system is simple and feasible, the construction quality is reliable, the industrialization, the standardization and the assembly of the bridge construction can be realized, the characteristic of constructing the continuous bridge by adopting the construction process of simply-supported beams can be achieved, and the bridge becomes an important bridge type in modern traffic engineering. The second-stage prestressed steel strand tensioning is a key process of simply supported continuous construction, and directly influences the durability of the bridge. The second-stage prestress tensioning position of the bridge type at the early stage is designed on a bridge floor, a single steel strand tensioning construction process is adopted, the prestress value is difficult to control, the whole-bundle tensioning is slowly optimized and improved below the wing plate, the prestress construction quality is effectively controlled through the process change, and the construction difficulty is increased. At present, the whole bundle of tensioning below a wing plate is adopted, and most of the method is to manufacture a support to be placed below the wing plate, and personnel and tensioning equipment are placed on the support to operate. However, this method has the following drawbacks: firstly, the support is suspended, and people and equipment are placed on the support, so that great potential safety hazards exist; secondly, the support and the equipment are difficult to move and operate, the working efficiency is low, the subsequent processes are influenced, and the construction cost is increased; and thirdly, the working procedure prolongs the construction time and is not beneficial to the control of the construction period. The defects in the prior art are overcome.
Disclosure of Invention
In order to solve the technical defects, the invention provides a prefabricated T-beam secondary prestressed steel strand tensioning support and a method, and designs a movable support capable of walking on a beam top and suspending tensioning equipment, so that personnel and the equipment are separated and are not on the same support, the support and the tensioning equipment can be quickly moved, the labor intensity is reduced, the potential safety hazard is eliminated to the maximum extent, the construction efficiency is improved, the construction period is shortened, the construction cost is reduced, and the economic benefit is improved.
The technical scheme of the invention is as follows: the utility model provides a prefabricated T roof beam secondary prestressing force steel strand stretching support, is including removing support and stretch-draw system, remove the support and include the stand, the lower extreme of stand is connected with the removal wheel, and the upper end of stand is connected with the carriage that supports stretch-draw system, stretch-draw system includes chain block, and chain block's end-to-end connection has crossbeam II, and the one end of crossbeam II is connected with the jack-draw, and the other end of crossbeam II is connected with the balancing weight.
The technical scheme of the invention also comprises: the two sides of the supporting frame are connected with a connecting seat I, and the connecting seat I is connected with an anti-overturning zipper.
The technical scheme of the invention also comprises: and clamping rings are connected to two sides of the top end of the supporting frame.
The technical scheme of the invention also comprises: and reinforcing rods are arranged at the corner positions where the upright columns are connected with the supporting frame.
The technical scheme of the invention also comprises: the quantity of stand is four, and the bottom of every stand all is connected with removes the wheel, and the stand that is located the front side passes through the horizontal pole with the bottom that is located the stand of rear side and is connected.
The technical scheme of the invention also comprises: the tensioning system comprises a beam I, a track is arranged on the beam I, a top wheel is installed in the track, and the top wheel is connected with a chain block through a connecting seat II.
The invention also provides a tensioning method of the prefabricated T-shaped beam secondary prestress steel strand, which mainly comprises the following steps:
moving a movable support above the T-shaped beams to a tensioning position, and adjusting a cross beam II to be aligned with a wet joint in the middle of the adjacent T-shaped beams or aligned with the outer sides of the edges of the T-shaped beams;
step two, lowering the cross beam II to be positioned below the T beam wing plate by using a chain block, and rotating the cross beam II to enable the tensioning jack to align and tension the steel strand to be tensioned;
and step three, after tensioning is finished, separating the tensioning jack from the tensioning steel strand, rotating the beam II, lifting the beam II to be positioned above the T-shaped beam wing plate by using the chain block, and moving the movable support to the next tensioning position.
The technical scheme of the invention also comprises: in the first step, after the movable support is moved to the tensioning position, the edge of the T-shaped beam is hooked by using the overturn-preventing zipper.
The invention has the beneficial effects that: through the movable support and the tensioning system of design components of a whole that can function independently, and remove the wheel at the bottom installation of movable support, can place movable support on the T roof beam pterygoid lamina, thereby can remove movable support above the T roof beam pterygoid lamina, and simultaneously, can drive the tensioning system and remove, and, personnel still carry out the stretch-draw operation below the pterygoid lamina, can realize that operation personnel and stretch-draw equipment separate from this, not on same support, the difficulty that the great dead weight of stretch-draw equipment that need overcome when having avoided stretch-draw equipment to hang below the pterygoid lamina removes, can realize the quick travel of stretch-draw equipment, can reduce intensity of labour, improve the efficiency of construction, shorten construction period, reduce construction cost, improve economic benefits, and, can furthest's elimination potential safety hazard.
Drawings
Fig. 1 is a schematic front view of the present invention.
Fig. 2 is a side view schematic of the present invention.
Fig. 3 is a front view of the mobile carriage of the present invention.
Fig. 4 is a side view of the mobile carriage of the present invention.
FIG. 5 is a schematic front view of a tensioning system of the present invention.
FIG. 6 is a side view schematic of a tensioning system of the present invention.
Fig. 7 is a schematic view of the use of the beam of the present invention.
Figure 8 is a schematic view of the use of the present invention in an edge beam.
1. The anti-overturning device comprises a movable support, 11, a support frame, 12, a clamping ring, 13, a stand column, 14, movable wheels, 15, a reinforcing rod, 16, a cross rod, 17, connecting seats I and 18, an anti-overturning zipper, 2, a tensioning system, 21, cross beams I and 22, connecting seats II and 23, a chain block, 24, cross beams II and 25, tensioning jacks, 26, top wheels, 27, balancing weights, 3 and T beams.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings.
As shown in fig. 1 to 6, the prefabricated T-beam secondary prestressed steel strand tensioning support comprises a movable support 1 and a tensioning system 2, wherein the movable support 1 comprises an upright column 13, and a movable wheel 14 is connected to the lower end of the upright column 13, so that the movable support 1 can move above a wing plate of the T-beam 3, equipment for tensioning operation can be separated from personnel and is not on the same support, the difficulty that the tensioning equipment needs to overcome the heavy dead weight of the tensioning equipment to move when the tensioning equipment is suspended below the wing plate is avoided, and the rapid movement of the tensioning equipment can be realized.
As shown in fig. 3 and 4, the moving frame 1 is designed as a frame structure, specifically, the moving frame 1 is composed of four vertical columns 13, a supporting frame 11 for supporting the tensioning system 2 is connected to the upper ends of the vertical columns 13, and the supporting frame 11 is formed by welding four rectangular steels or angle steels. The clamping rings 12 are connected above two sides of the supporting frame 11 and used for installing a cross beam I21 of the tensioning system 2, the connecting seats I17 are connected below two sides of the supporting frame 11 and used for installing the overturn-preventing zipper 18, and when tensioning is carried out, the overturn-preventing zipper 18 can be hooked with the edge of the T-shaped beam 3 to be fixedly supported.
Reinforcing bars 15 are provided at the corner positions where the uprights 13 are connected to the support frame 11 to reinforce the strength of the entire moving rack 1, and a cross bar 16 is provided at the connecting bottom of the front and rear uprights 13, 16.
As shown in fig. 5 and 6, the tensioning system 2 comprises a cross beam I21 and a cross beam II 24, wherein the cross beam I21 is installed in the clamping ring 12 to support the whole tensioning system 2, a track is designed on the cross beam I21, a top wheel 26 is installed in the track, the top wheel 26 is connected with a chain block 23 through a connecting seat II 22, the position of the chain block 23 can be changed by moving the top wheel 26 at the position of the cross beam I21, and therefore the tensioning system is conveniently suitable for middle beam tensioning and side beam tensioning.
The tail end of the chain block 23 is connected with the beam II 24, and the beam II 24 can be driven to lift or lower by operating the chain block 23. One end of the cross beam II 24 is connected with a tensioning jack 25 which can tension the steel strand, and the other end of the cross beam II 24 is connected with a balancing weight 27 to ensure that tensioning operation is smoothly carried out.
As shown in fig. 7, the method for tensioning the center sill according to the present invention comprises: firstly, moving a movable support 1 to a tensioning position above a wing plate of a T-shaped beam 3, and then adjusting a cross beam II 24 to align a tensioning system 2 to a wet joint in the middle of the T-shaped beam; then, pulling a guide chain of the chain block 23 to place a cross beam II 24 of the tensioning system 2 below a wing plate of the T-shaped beam 3 along a wet joint, rotating the cross beam II 24 to enable a tensioning jack 25 to be aligned with a tensioning steel strand, penetrating the steel strand into the jack, installing a tool anchor and a clamping piece, and starting an oil pump to perform tensioning; and finally, after tensioning is finished, the jack is taken down, the cross beam II 24 is rotated to pull the guide chain of the chain block 23, the cross beam II 24 is lifted to the bridge floor, and the next working surface is moved.
As shown in fig. 8, the method for tension-working the side sill according to the present invention comprises: firstly, the chain block 23 and the crossbeam II need to be moved to proper positions by the moving top wheel 26, then the moving support 1 is moved to a tensioning position above a wing plate of the T-shaped beam 3, the crossbeam II 24 is adjusted to place the tensioning system 2 below the wing plate of the T-shaped beam 3 from the outer side of the side beam, the crossbeam II 24 is rotated to enable the tensioning jack 25 to be aligned with a tensioning steel strand, the steel strand is penetrated into the jack, a tool anchor and a clamping piece are installed, an oil pump is started for tensioning, after tensioning is completed, the jack is taken down, the crossbeam II 24 is rotated to pull a guide chain of the chain block 23, the crossbeam II 24 is lifted to a bridge floor, and the next working surface is moved.
The above description is only exemplary of the present invention and should not be taken as limiting the invention in any way, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The utility model provides a prefabricated T roof beam secondary prestressing steel strand stretching support which characterized in that: including moving movable support (1) and tensioning system (2), moving movable support (1) including stand (13), the lower extreme of stand (13) is connected with removes wheel (14), and the upper end of stand (13) is connected with carriage (11) that support tensioning system (2), moving movable support (1) moves in T roof beam aerofoil top, tensioning system (2) include chain block (23), and the end-to-end connection of chain block (23) has crossbeam II (24), and the one end of crossbeam II (24) is connected with tensioning jack (25), and the other end of crossbeam II (24) is connected with balancing weight (27).
2. The pre-fabricated T-beam secondary prestressed steel strand tensioning bracket as set forth in claim 1, wherein: two sides of the supporting frame (11) are connected with a connecting seat I (17), and the connecting seat I (17) is connected with an overturn-preventing zipper (18).
3. The pre-fabricated T-beam secondary prestressed steel strand tensioning bracket as set forth in claim 2, wherein: and clamping rings (12) are connected to two sides of the top end of the supporting frame (11).
4. The pre-fabricated T-beam secondary prestressed steel strand tensioning bracket as set forth in claim 1, wherein: and reinforcing rods (15) are arranged at corner positions where the upright columns (13) are connected with the supporting frame (11).
5. The pre-fabricated T-beam secondary prestressed steel strand tensioning bracket as set forth in claim 4, wherein: the quantity of stand (13) is four, and the bottom of every stand (13) all is connected with and removes wheel (14), and the bottom that is located stand (13) of front side and stand (13) that is located the rear side passes through horizontal pole (16) to be connected.
6. A prefabricated T-beam secondary prestressed steel strand tensioning support as claimed in any one of claims 1 to 5, wherein: tensioning system (2) are including crossbeam I (21), the top both sides of carriage (11) are connected with snap ring (12), install in snap ring (12) crossbeam I (21), be provided with the track on crossbeam I (21), install in the track crown wheel (26), crown wheel (26) are connected with chain block (23) through connecting seat II (22).
7. A tensioning method for a prefabricated T-shaped beam secondary prestress steel strand by using the tensioning bracket as claimed in any one of claims 1 to 6 mainly comprises the following steps:
moving the movable support (1) to a tensioning position above the T-shaped beam (3), and adjusting a cross beam II (24) to be aligned with a wet joint in the middle of the adjacent T-shaped beam (3) or aligned with the outer side of the edge part of the T-shaped beam (3);
secondly, lowering the cross beam II (24) to be positioned below a wing plate of the T beam (3) by using a chain block (23), and rotating the cross beam II (24) to enable a tensioning jack (25) to be aligned to the steel strand to be tensioned and tensioning;
and step three, after tensioning is finished, separating the tensioning jack (25) from the tensioning steel strand, rotating the beam II (24), lifting the beam II (24) to be positioned above the wing plate of the T beam (3) by using the chain block (23), and moving the movable support (1) to the next tensioning position.
8. The method for tensioning the pre-fabricated T-beam secondary prestressed steel strand as claimed in claim 7, wherein: in the first step, after the movable support (1) is moved to a tensioning position, the edge of the T-shaped beam (3) is hooked by using an anti-overturning zipper (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710452210.8A CN107237264B (en) | 2017-06-15 | 2017-06-15 | Prefabricated T-beam secondary-stage prestress steel strand tensioning support and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710452210.8A CN107237264B (en) | 2017-06-15 | 2017-06-15 | Prefabricated T-beam secondary-stage prestress steel strand tensioning support and method |
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| Publication Number | Publication Date |
|---|---|
| CN107237264A CN107237264A (en) | 2017-10-10 |
| CN107237264B true CN107237264B (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710452210.8A Active CN107237264B (en) | 2017-06-15 | 2017-06-15 | Prefabricated T-beam secondary-stage prestress steel strand tensioning support and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112412080B (en) * | 2020-11-09 | 2022-01-04 | 厦门安科科技有限公司 | Anti-falling device for building entrance to a cave |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001088063A (en) * | 1999-09-20 | 2001-04-03 | Fuji Bolt Seisakusho:Kk | Reinforcement joint crimping device |
| CN201411911Y (en) * | 2009-05-31 | 2010-02-24 | 中国第一冶金建设有限责任公司 | Suspension attachment for pre-stressing tensioning jack |
| CN203188122U (en) * | 2013-03-01 | 2013-09-11 | 浙江省交通工程建设集团有限公司 | Movable type prestress tension platform |
| CN203593962U (en) * | 2013-10-11 | 2014-05-14 | 中铁十九局集团第六工程有限公司 | Movable transversally-tensioning device of T-shaped beam bridge floor system |
| CN203755163U (en) * | 2013-12-27 | 2014-08-06 | 中铁十五局集团有限公司 | Steel strand tension tool of united span cast-in-situ simply-supported box girder |
| CN105463994A (en) * | 2015-12-23 | 2016-04-06 | 中国三冶集团有限公司 | Prestress tensioning jack movement device and prestress box girder structure tensioning method |
-
2017
- 2017-06-15 CN CN201710452210.8A patent/CN107237264B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001088063A (en) * | 1999-09-20 | 2001-04-03 | Fuji Bolt Seisakusho:Kk | Reinforcement joint crimping device |
| CN201411911Y (en) * | 2009-05-31 | 2010-02-24 | 中国第一冶金建设有限责任公司 | Suspension attachment for pre-stressing tensioning jack |
| CN203188122U (en) * | 2013-03-01 | 2013-09-11 | 浙江省交通工程建设集团有限公司 | Movable type prestress tension platform |
| CN203593962U (en) * | 2013-10-11 | 2014-05-14 | 中铁十九局集团第六工程有限公司 | Movable transversally-tensioning device of T-shaped beam bridge floor system |
| CN203755163U (en) * | 2013-12-27 | 2014-08-06 | 中铁十五局集团有限公司 | Steel strand tension tool of united span cast-in-situ simply-supported box girder |
| CN105463994A (en) * | 2015-12-23 | 2016-04-06 | 中国三冶集团有限公司 | Prestress tensioning jack movement device and prestress box girder structure tensioning method |
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| CN107237264A (en) | 2017-10-10 |
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Effective date of registration: 20200417 Address after: Lixia District, Shandong city of Ji'nan province 250101 Olympic road No. 2666, building A, railway construction Patentee after: CHINA RAILWAY 14TH CONSTRUCTION BUREAU GROUP BUILDING ENGINEERING Co.,Ltd. Address before: 250101 No. 2666 Olympic Sports West Road, Lixia District, Shandong, Ji'nan Patentee before: CHINA RAILWAY SHISIJU GROUP Corp. |