CN114474360B - Pretensioned precast beam self-anchored tensioning pedestal - Google Patents
Pretensioned precast beam self-anchored tensioning pedestal Download PDFInfo
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- CN114474360B CN114474360B CN202111672560.8A CN202111672560A CN114474360B CN 114474360 B CN114474360 B CN 114474360B CN 202111672560 A CN202111672560 A CN 202111672560A CN 114474360 B CN114474360 B CN 114474360B
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- precast beam
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- anchoring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
- B28B23/043—Wire anchoring or tensioning means for the reinforcements
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to the technical field of precast beam stretching pedestal, in particular to a pre-tensioning method precast beam self-anchored stretching pedestal, which comprises a precast beam forming module with a set length and two stretching anchoring modules which are separately arranged at two ends of the precast beam forming module and detachably connected with the precast beam forming module; the precast beam forming module supports two tensioning and anchoring modules, and each tensioning and anchoring module is provided with a tensioning mechanism for tensioning the prestressed steel bundles; according to the invention, through the modularized self-anchored tensioning pedestal structure, structures such as a pulling-resistant pile, a counter-force wall, an underground connecting beam and the like are not required to be arranged, and equipment transfer and turnover can be carried out according to construction requirements.
Description
Technical Field
The invention relates to the technical field of precast beam tensioning bases, in particular to a pre-tensioning precast beam self-anchored tensioning base.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The prestressed concrete simply supported beam generally adopts an assembly construction method, and the upper structure of the prestressed concrete simply supported beam generally adopts a T-shaped beam, a hollow slab beam, a small box beam or an I-shaped beam. From the economical point of view, the prefabricated structure is more suitable for industrial production.
The precast beam can be constructed by adopting a pretensioning method and a post-tensioning method, compared with the construction by adopting a post-tensioning method, the pretensioning method has simple construction, the precast beam is anchored by the binding force of the prestressed steel beam and the concrete, a special anchor is not required to be consumed, the temporary anchor can be reused, the quality of a finished product is stable, and the economy is remarkable during mass production.
But the pretensioning method construction production line needs to be provided with large-scale fixing equipment such as counter-force walls, anti-pulling anchor piles, underground connecting beams, tensioning tables and the like, and meanwhile, the prefabricated site needs to be deeply hardened, so that the one-time investment is large, the site is fixed and cannot be moved, the transportation distance is long, or when a large number of orders are not continuously ensured to be produced, the disadvantage that the equipment cannot be turned over can be displayed, and the economical efficiency is poor. In addition, bridges are built on highways or expressways, the route extends far, the conventional pretensioning method is adopted for prefabricating Liang An, construction sites are required to be laid at a plurality of places along the route according to the transportation distance, the repeated investment is large, most of equipment cannot be removed for turnover use, and after the engineering is finished, the construction sites are subjected to embarrassing situations of abandonment.
Disclosure of Invention
The invention aims to provide a self-anchored tensioning pedestal for a pretensioned precast beam, which aims to solve the problem that the tensioning pedestal for the pretensioned precast beam cannot be turned over in the prior art. In order to achieve the above object, the present invention solves the following problems by the following technical scheme:
the invention provides a pretensioned precast beam self-anchored tensioning pedestal, which comprises a precast beam forming module with a set length and two tensioning and anchoring modules which are separately arranged at two ends of the precast beam forming module and detachably connected with the precast beam forming module;
the precast beam forming module supports two tensioning and anchoring modules, each tensioning and anchoring module is provided with a tensioning mechanism for tensioning the prestressed steel bundles, and the tensioning mechanism is anchored on the tensioning and anchoring module.
Further, the counterweight, the prestress steel beam guide and the prestress steel beam bending machine are installed on the precast beam forming module, and the upward pulling force generated by the prestress steel beam steering at the position of the prestress steel beam bending machine is counteracted through the counterweight.
Further, the precast beam forming module is formed by splicing a plurality of standard sections with set lengths.
Further, each tensioning anchoring module comprises an anchoring section and a tensioning section, the tensioning section is provided with a tensioning trolley, the anchoring section is provided with a jack, and the jack is connected with the tensioning trolley through a steel pull rod.
Further, the bottom of the anchoring section is provided with an inclined strut, and the outer side of the inclined strut is higher than the inner side of the inclined strut.
Further, each standard section comprises a frame structure, the frame structure is in a shape of a Chinese character kou, and a steel bottom die and side dies arranged on the inner sides of two side parts are arranged on the inner side of the bottom of the frame structure.
Further, bottom corners and middle of the frame structure are provided with lower chords which are longitudinally arranged and are connected through a lower cross beam, top corners of the frame structure are provided with upper chords which are longitudinally arranged and are connected through an upper cross beam, the bottom corners are provided with the upper chords and the lower chords which are arranged at the top corners are supported through web members, and the upper cross beam is detachably connected with the upper chords.
Further, a first distribution beam is arranged between the steel bottom die and the inner side of the bottom of the frame structure.
Further, the standard sections are spliced through flanges, and the upper chord member is connected with the upper cross beam through flanges.
Further, triangular support structures are arranged on two lateral sides of the precast beam forming module.
The beneficial effects of the invention are as follows:
(1) The tensioning pedestal is assembled by the precast beam forming module and the tensioning anchoring module, the anchoring of the tensioning mechanism is realized through the tensioning anchoring module, meanwhile, the precast beam forming module is used for supporting the tensioning anchoring module, the pulling-resistant piles, the counter-force wall and the underground connecting beam are not required to be arranged, the tensioning requirement can be met only by simple hardening of the site, the defect that the tensioning pedestal cannot be turned over in the prior art is overcome, and equipment transfer and turning can be carried out along with construction requirements.
(2) The counterweight is arranged on the precast beam forming module, and the upward pulling force generated by the steering of the prestressed steel beam at the position of the prestressed steel beam bender is counteracted by the counterweight, so that the precast beam forming module is prevented from buckling upwards at the position of the prestressed steel beam bender.
(3) The preset length of the precast beam forming module can be adjusted according to actual requirements, and the precast beam forming module can be applied to manufacturing of single-piece beams with different lengths and simultaneous manufacturing of multiple pieces of beams, so that the application range of a tensioning pedestal is enlarged.
(4) The prefabricated beam forming module is formed by splicing a plurality of standard sections with set lengths, can be automatically lengthened according to a prefabricated site, is more beneficial to turnover of a tensioning pedestal, and can be better suitable for working conditions of manufacturing longer single-piece beams or multi-piece beams.
(5) The precast beam forming module is formed by splicing the standard sections with the set length, and the standard sections can be replaced when damaged, so that the partial replacement is realized, the defect that a certain part of the precast beam forming module is damaged to replace the whole precast beam forming module is overcome, and the waste of materials is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. It should also be understood that the drawings are for simplicity and clarity and have not necessarily been drawn to scale. The invention will now be described and explained with additional specificity and detail through the use of the accompanying drawings in which:
FIG. 1 shows a schematic diagram of the overall structure of a monolithic beam self-anchored tensioning bench of the present invention;
FIG. 2 shows a schematic diagram of the overall structure of the multi-beam self-anchored tensioning stand of the present invention;
FIG. 3 is an isometric view of the overall structure frame structure of the self-anchored tensioning stand of the present invention;
FIG. 4 is a front view of the overall structure frame structure of the self-anchored tensioning mount of the present invention;
FIG. 5 is an isometric view of a self-anchored tensioning mount precast beam forming module of the present invention;
FIG. 6 shows a transverse cross-sectional view of the self-anchored tensioning stand of the present invention;
FIG. 7 illustrates an isometric view of a self-anchored tensioning block of the present invention;
FIG. 8 shows a cross-sectional view of a tensioning segment of the self-anchored tensioning stand of the present invention;
fig. 9 shows a schematic view of the triangular support structure of the self-anchored tensioning stand of the present invention.
In the figure, a prefabricated beam forming module, a tensioning anchoring module, a first standard section, a second standard section, a third standard section, a 6 anchoring section, a 7 tensioning section, an 8 prefabricated beam, a 9 prestressed steel beam, a 10 prestressed steel beam guide, a 11 prestressed steel beam bending device, a 12 first distributing beam, a 13 steel bottom die, a 14 tensioning trolley, a 15 jack, a 16 steel pull rod, a 17 counterweight, a 18 second distributing beam, a 19 first splicing position, a 20 second splicing position, a 21 third splicing position, a 22 fourth splicing position, a 23 upper chord, a 24 lower chord, a 25 upper beam, a 26 lower beam, a 27 chord, a 28 upper anchoring box, a 29 lower anchoring box, a 30 diagonal bracing, a 31 diagonal chord, a 32 anchoring beam, a 33 end upper chord, a 34 end lower chord, a 35 bracing, a 36 end chord, a 37 walking platform, a 38 triangular support structure, a 39 transverse baffle, channel steel, 40, 41I-shaped steel.
Detailed Description
The technical solution of an exemplary embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention.
As shown in fig. 1 to 9, the present embodiment provides a pretensioned precast beam self-anchored tensioning stand. The device comprises a precast beam forming module 1 with a set length and two tensioning anchor modules 2 which are detachably connected with two ends of the precast beam forming module 1, wherein the two tensioning anchor modules are respectively arranged at the two ends of the precast beam forming module 1, as shown in fig. 1 and 3;
the precast beam forming module 1 supports two tensioning anchor modules 2, and each tensioning anchor module 2 is provided with a tensioning mechanism for tensioning the prestressed steel bundles 9.
The stretch-draw pedestal of this embodiment is assembled by precast beam forming module 1 and stretch-draw anchor module 2 to realize the anchor of stretch-draw mechanism through stretch-draw anchor module 2, precast beam forming module 1 is used for supporting stretch-draw anchor module 2 simultaneously, need not set up anti-pulling pile, counter-force wall and underground continuous beam, and the place only needs simple hardening can satisfy the stretch-draw requirement, has overcome the defect that stretch-draw pedestal can't the turnover among the prior art, can carry out equipment transfer and turnover along with the construction needs.
As shown in fig. 1, the precast beam forming module 1 is provided with a counterweight 17, a prestressed steel beam guide 10 and a prestressed steel beam bender 11, and the upward pulling force generated by the steering of the prestressed steel beam 9 at the position of the prestressed steel beam bender 11 is counteracted by the counterweight 17, so that the precast beam forming module 1 is prevented from buckling upwards at the position of the prestressed steel beam bender 11. Wherein the arrangement positions of the prestress steel beam guide 10 and the prestress steel beam bending machine 11 can be designed according to actual requirements. The counterweight 13 and the precast beam forming module 1 are provided with a second distribution beam 18 for equalizing the weight of the counterweight 13.
It can be understood that the length of the precast beam forming module 1 can be adjusted according to actual requirements, and the precast beam forming module can be applied to manufacturing of single-piece beams with different lengths and simultaneous manufacturing of multiple-piece beams, so that the application range of the tensioning pedestal is increased, and two-piece beams are manufactured simultaneously as shown in fig. 2.
Of course, in order to overcome such a defect, if the precast beam forming module 1 is of an integral structure, it is disadvantageous to turn around the tensioning stand when manufacturing a long or single-piece beam or multi-piece beam, the precast beam forming module 1 is formed by splicing a plurality of standard segments having a set length. It will be appreciated that the lengths of the standard segments may be the same or different or partially the same.
The precast beam forming module 1 is formed by splicing a plurality of standard sections with set lengths, and when a certain standard section is damaged, the section can be replaced, so that local replacement is realized, the defect that a certain part of the precast beam forming module 1 is damaged to replace the whole precast beam forming module is overcome, and the waste of materials is reduced.
It should be noted that, when the length of the precast beam is long or a plurality of beams are precast at the same time, triangular support structures 38 are provided on both lateral sides of the precast beam forming module in order to ensure the lateral compression stability of the tensioning stand, as shown in fig. 9. It will be appreciated that only a localized setting is required.
As shown in fig. 4, in this embodiment, the precast beam forming module 1 is formed by splicing a first standard segment 3, a second standard segment 4 and a third standard segment 5, where the lengths of the first standard segment 3 and the third standard segment 5 are the same, and the precast beam forming module is suitable for the working condition of a single beam. Additionally, in other embodiments, two sets of first standard segments 3, second standard segments 4, and third standard segments 5 may be provided to accommodate the two-piece beam condition.
As shown in fig. 5 and 6, each standard section comprises a frame structure, the frame structure is in a shape of a Chinese character kou, a steel bottom die 13 and side dies arranged on the inner sides of two side parts are arranged on the inner sides of the bottom of the frame structure, not shown in the drawings, the steel bottom die 13 and the side dies are used for forming precast beams, and the precast beams are selected according to actual needs.
The bottom corner and the middle of the frame structure are provided with lower chords 24 which are longitudinally arranged and are connected through a lower cross beam 26, the top corner of the frame structure is provided with an upper chord 23 which is longitudinally arranged and is connected through an upper cross beam 25, the upper chords 23 arranged at the bottom corner and the lower chords 24 arranged at the top corner are supported through web members 27, and the upper cross beam 25 is detachably connected with the upper chords 23.
The upper cross beam 25 is detachably connected with the upper chord 23 to facilitate hoisting of templates or other construction equipment.
The ends of the upper chord member 23 and the lower chord member 24 are provided with flanges, the standard sections are spliced through the flanges, and the joint of the upper chord member 23 and the upper cross beam 25 is provided with a flange and is connected through the flange.
As shown in fig. 6, the upper chord 23 and the lower chord 24 are welded by the i-steel 41 and the channel steel 40, and before welding, a diaphragm 39 is arranged between the i-steel 41 and the channel steel 40, and the diaphragm 39 corresponds to the vertical plate positions of the upper beam 25 and the lower beam 36, so that the outer steel plates of the upper chord 23 and the lower chord 24 are prevented from being partially buckled.
The channel steel 40 is perforated in advance at the corresponding position, the diaphragm plates 39 are welded on the I-steel 41, the diaphragm plates 39 extend out of the reserved holes of the channel steel 40, and the vertical plates of the upper beam 25 and the lower beam 36 are correspondingly shortened and welded with the extending diaphragm plates 39.
A first distribution beam 12 is arranged between the steel bottom die 23 and the inner side of the bottom of the frame structure, and the first distribution beam 12 is used for uniformly distributing the weight of the precast beam 8.
As shown in fig. 4, each tension anchor module 2 comprises an anchor section 6 and a tension section 7, the tension section 7 is provided with a tension trolley 14, the anchor section 6 is provided with a jack 15, and the jack 15 and the tension trolley 14 are connected through a steel pull rod 16. The tensioning trolley 14 is a prior art, and the specific structure thereof is not described herein.
In this embodiment, the anchor section 6 and the tensioning section 7 of the tensioning anchor module 2 likewise have a frame structure, the contour of which is identical to the contour of the frame structure of the standard section. As shown in fig. 7, the top corners of the frame structures of the anchor section 6 and the tension section 7 have end upper chords 33 and the bottom corners have end lower chords 34, the anchor section 6 and the tension section 7 share the end upper chords 33 and the end lower chords 34, and the end upper chords 33 and the end lower chords 34 are flanged together with the upper chords 23 and the bottom lower chords 24 provided at the bottom corners. The end upper chord 33 and the end lower chord 34 are supported by end web members 36, and the outer ends of the anchor segments 6 are provided with upper and lower anchor boxes 28, 29 for anchoring the jack 15.
In the present embodiment, the first standard segment 3 and the second standard segment 4 are spliced at the first splice point 19 by the first flange 39, and the third standard segment 5 and the second standard segment 4 are spliced at the second splice point 20 by the first flange 39. Similarly, the first standard section 3 and the tension section 7 are spliced together through a flange at a third splicing position 21, and the third standard section 5 and the tension section 7 at the other end are spliced together through a flange at a fourth splicing position 22.
The bottom of the anchoring section 6 is provided with a diagonal brace 30, and the outer side of the diagonal brace 30 is higher than the inner side. In this embodiment, the diagonal braces 30 are connected with the upper side in abutment with the lower anchor boxes 29 and with the lower side in abutment with the anchor beams 32. A compression brace 35 is arranged at the bottom of the tensioning section 7, and a walking platform 37 is arranged above the compression brace 35 for the tensioning trolley 14 to move back and forth thereon, as shown in fig. 8.
Although the present invention has been described with respect to the preferred embodiments, it is not intended to be limited thereto, and any person skilled in the art can make any possible variations and modifications to the technical solution of the present invention by using the methods and techniques disclosed herein without departing from the spirit and scope of the present invention.
Claims (6)
1. The self-anchored tensioning pedestal of the pretensioned precast beam is characterized by comprising a precast beam forming module with a set length and two tensioning and anchoring modules which are respectively arranged at two ends of the precast beam forming module and detachably connected with the precast beam forming module;
the precast beam forming module supports two tensioning and anchoring modules, each tensioning and anchoring module is provided with a tensioning mechanism for tensioning a prestressed steel beam, and the tensioning mechanism is anchored on the tensioning and anchoring module;
the precast beam forming module is formed by splicing a plurality of standard sections with set lengths;
the precast beam forming module is provided with a counterweight, a prestressed steel beam guider and a prestressed steel beam bending machine, and the counterweight counteracts the upward pulling force generated by the steering of the prestressed steel beam at the position of the prestressed steel beam bending machine;
each tensioning anchoring module comprises an anchoring section and a tensioning section, wherein the tensioning section is provided with a tensioning trolley, the anchoring section is provided with a jack, and the jack is connected with the tensioning trolley through a steel pull rod;
the bottom of the anchoring section is provided with an inclined strut, and the outer side of the inclined strut is higher than the inner side of the inclined strut;
the tensioning mechanism is anchored through the tensioning anchoring module, the anti-pulling pile, the counter-force wall and the underground connecting beam are not required to be arranged, and the field can meet the tensioning requirement only by simple hardening.
2. A pretensioned precast beam self-anchored tensioning stand according to claim 1, wherein each of the standard sections comprises a frame structure, the frame structure being "mouth" shaped, the frame structure being provided with a steel bottom die on the bottom inside and side dies on the side inside of both sides.
3. A pre-tensioned precast beam self-anchored tensioning mount as claimed in claim 2, wherein bottom corners and middle of the frame structure are provided with longitudinally arranged lower chords and are connected by lower beams, top corners of the frame structure are provided with longitudinally arranged upper chords and are connected by upper beams, the upper chords arranged at the bottom corners and the lower chords arranged at the top corners are supported by web members, and the upper beams are detachably connected with the upper chords.
4. A pretensioned precast beam self-anchored tensioning mount according to claim 3, wherein a first distribution beam is provided between the steel counter-form and the inside of the bottom of the frame structure.
5. A pretensioned precast beam self-anchored tensioning mount as in claim 4, in which said standard segments are spliced by flanges, said upper chord being flanged to said upper beam.
6. A pretensioned precast beam self-anchored tensioning stand according to any one of claims 1 to 5, wherein the precast beam forming modules are provided with triangular support structures on both lateral sides.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111672560.8A CN114474360B (en) | 2021-12-31 | 2021-12-31 | Pretensioned precast beam self-anchored tensioning pedestal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111672560.8A CN114474360B (en) | 2021-12-31 | 2021-12-31 | Pretensioned precast beam self-anchored tensioning pedestal |
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| CN114474360A CN114474360A (en) | 2022-05-13 |
| CN114474360B true CN114474360B (en) | 2023-08-29 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114800854B (en) * | 2022-06-07 | 2024-04-05 | 德州海天机电科技有限公司 | Self-holding load tensioning system for double-row tensioning steel beam |
| CN114953163A (en) * | 2022-06-16 | 2022-08-30 | 中交(临沂)建筑科技有限公司 | Movable pre-tensioning method prestress hollow slab production pedestal |
| CN116201035B (en) * | 2023-02-28 | 2024-01-16 | 山东四方路桥集团股份有限公司 | Prestress steel strand steering gear |
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| CN103195185A (en) * | 2013-04-11 | 2013-07-10 | 北京工业大学 | I-shaped single-plate assembling steel structure prestressed buckling preventing support |
| CN107724241A (en) * | 2017-09-28 | 2018-02-23 | 中铁四局集团有限公司 | A kind of construction method of counterweight construction Cable-stayed Bridges accessory structure |
| CN109676784A (en) * | 2019-01-23 | 2019-04-26 | 四川公路桥梁建设集团有限公司 | A kind of assembled steel-concrete combined structure pedestal and pre-tensioning system T beam construction |
| CN112518983A (en) * | 2020-12-11 | 2021-03-19 | 保利长大工程有限公司 | Pre-tensioning method precast beam slab tensioning pedestal structure |
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2021
- 2021-12-31 CN CN202111672560.8A patent/CN114474360B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195185A (en) * | 2013-04-11 | 2013-07-10 | 北京工业大学 | I-shaped single-plate assembling steel structure prestressed buckling preventing support |
| CN107724241A (en) * | 2017-09-28 | 2018-02-23 | 中铁四局集团有限公司 | A kind of construction method of counterweight construction Cable-stayed Bridges accessory structure |
| CN109676784A (en) * | 2019-01-23 | 2019-04-26 | 四川公路桥梁建设集团有限公司 | A kind of assembled steel-concrete combined structure pedestal and pre-tensioning system T beam construction |
| CN112518983A (en) * | 2020-12-11 | 2021-03-19 | 保利长大工程有限公司 | Pre-tensioning method precast beam slab tensioning pedestal structure |
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