CN202644842U - Inner tension prestressed concrete single-layer T-shaped frame box structure - Google Patents
Inner tension prestressed concrete single-layer T-shaped frame box structure Download PDFInfo
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- CN202644842U CN202644842U CN 201220098372 CN201220098372U CN202644842U CN 202644842 U CN202644842 U CN 202644842U CN 201220098372 CN201220098372 CN 201220098372 CN 201220098372 U CN201220098372 U CN 201220098372U CN 202644842 U CN202644842 U CN 202644842U
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Abstract
The utility model relates to an inner tension prestressed concrete single-layer T-shaped frame box structure of a building. A frame structure is arranged parallel to a section direction to form a box-shaped section. The span range of a frame beam is 7-36 m. A prestressed rib is arranged in a frame. A tension slot is reserved in the side surface of the frame in the structure. After the concrete reaches the ruled strength, a same prestressed rib bundle is sequentially connected for sections in an end-to-end manner and is also tensioned at the tension slot through a middle anchorage device, and then the tension slot is blocked. The inner tension prestressed concrete single-layer T-shaped frame box structure is characterized in that the tension slot is reserved at a small-stress position convenient for construction on the side surface of the frame in the structure, and is connected with and tensions the prestressed rib through the middle anchorage device. The structure has the advantages that prestressed tension connection can be realized when the end part of a structure component does not have a tension anchorage condition; relatively good comfortableness, usage performance and structure performance can be provided; and the structure is especially suitable for an underground heavy-duty large-span single-layer frame box structure.
Description
Affiliated technical field
The utility model relates to a kind of T-shaped framework box structure of post-tensioned prestressed concrete individual layer of building, especially when not possessing tension of prestressed tendon, anchoring condition in frame ends, connect the also T-shaped framework box structure of post-tensioned prestressed concrete individual layer of tensioned prestressing bar in the concrete frame side of inside configuration.
Background technology
At present, the T-shaped framework box structure of known post-tensioned prestressed concrete individual layer is sleeve pipe, distributing bar and the part of settling first post-tensioned prestressing muscle pore-forming, then installation form and concreting.Presstressed reinforcing steel can also can be worn later on by first threading.After reaching intensity Deng concrete, with jack with tension of prestressed tendon to the stress that requires and anchor in the two ends of beam, compressive pre-stress is passed to concrete members by the two ends ground tackle.In order to protect presstressed reinforcing steel not corroded and to recover adhesion stress between presstressed reinforcing steel and the concrete, the space between presstressed reinforcing steel and the sleeve pipe must fill with real with cement paste.Cement paste also is conducive to recover the adhesion stress between presstressed reinforcing steel and the concrete except playing antisepsis.For convenient construction, sometimes also can adopt presstressed reinforcing steel external coating anti-corrosion material and with plastic bushing or oilpaper parcel without bonded post tensioning prestressing force.But, at the two ends of underground structure member, usually need to reserve the stretch-draw groove because of stretch-draw prestressing force, cause increasing construction costs, prolong the construction period, concerning some engineerings, it is unacceptable prolonging the construction period.The 11st page of " Guangdong building and building " o. 11th of publishing in November, 2002 disclosed one undergroundly stride greatly, heavy structure, this article compares prestressing force and ordinary concrete structure two schemes, and point out: prestressed structure can further reduce the steel concrete consumption of subway station, reduce beam/plate height, so that the station buried depth is less; Station top board span centre maximum distortion is less, and crack resistance is also better; But consider the employing prestressed Construction Technology, construction technology is comparatively complicated, and difficulty of construction is larger, therefore present Ying Shenyong in the construction of underground station.This design final choice ordinary concrete structural concept.Compare with prestressed structure, this ordinary concrete malformation is large, cracking resistance is relatively poor, endurance quality is bad, economy is general, limited stride greatly, the further application of heavy structure.
The utility model content
Require to reserve the deficiency of stretch-draw anchor condition in its end in order to overcome the existing T-shaped framework box structure of post-tensioned prestressed concrete individual layer, the utility model provides a kind of inner stretch-draw prestressing force concrete individual layer T-shaped framework box structure, the T-shaped framework box structure of this individual layer no longer requires must reserve the stretch-draw anchor condition in its end, but can reserve the stretch-draw groove at the frame facet of inside configuration, in the stretch-draw groove, finish the connection of presstressed reinforcing steel by middle ground tackle, stretch-draw, the T-shaped framework box-shaped of this individual layer construction pre-stress stretching technique is comparatively simple, difficulty of construction is less, duration is relatively short, and cost is relatively low.
The technical solution of the utility model is:
A kind of T-shaped framework box structure of inner stretch-draw prestressing force concrete individual layer of building, in parallel its section direction frame construction is set, form box section, Vierendeel girder span-depth radio scope is at 7～36 meters, presstressed reinforcing steel is set in framework, it is stressed less that the stretch-draw groove is reserved in inside configuration, the frame facet of easy construction, when placing of concrete and after reaching prescribed strength, be linked in sequence by each section head and the tail of middle ground tackle with same Prestress tendon at stretch-draw groove place, then the end in the close inside configuration of middle ground tackle carries out stretch-draw, after stretch-draw is complete on request shutoff stretch-draw groove get final product, it is characterized in that: the stretch-draw groove is reserved in the side of structural inner frame, the position of stressed less and easy construction connects and tensioned prestressing bar by middle ground tackle.
Feature of the present utility model also is: the structure cross section is the individual layer box-formed shape, and the Vierendeel girder span L is not less than 7 meters, and Vierendeel girder is T-shaped cross section, and frame spacing is not more than L/3.
Feature of the present utility model also is: presstressed reinforcing steel is similar to traditional prestressed frame beam arrangement of reinforcement in the Vierendeel girder, be positive and negative parabolic distribution, the inflection point position is generally 0.08L～0.12L, the presstressed reinforcing steel that is arranged in frame column and the Vierendeel girder forms a loop curve, the prestressing tendon profile is as far as possible consistent with bending moment diagram, as far as possible near the tension edge placement.
Feature of the present utility model also is: the bundle shape of presstressed reinforcing steel can be closed curve, also can be non-closed curve; If closed curve, without anchored end; If be non-closed curve, its end is anchored end.
Feature of the present utility model also is: in same Pin prestressed frame, and the radical of every bundle presstressed reinforcing steel and prestressing tendon number, according to the setting of design needs, presstressed reinforcing steel is arranged about the vertical axis of symmetry of framework symmetrical.
Feature of the present utility model also is: the stretch-draw groove is reserved in Vierendeel girder apart from a near side of the natural axis quartile of end; The spacing of same prestressing tendon preformed groove and middle ground tackle, according to the setting of design needs, its scope is 15～50 meters.
Feature of the present utility model also is: if possess the stretch-draw space, carry out stretch-draw at middle ground tackle near inside configuration or an outside end.
Feature of the present utility model also is: if possess the stretch-draw anchor condition, the stretch-draw groove is reserved in inside configuration or outside frame ends and side.
The beneficial effects of the utility model are, when the T-shaped framework box structure of individual layer end does not possess the stretch-draw anchor condition, can realize prestressed stretch-draw, anchoring, be specially adapted to underground heavy duty, stride the T-shaped framework box structure of concrete individual layer greatly, preferably comfort level and functional performance can be provided, can reduce floor space, shorten the construction period, and simple in structure, easy construction.Compare with the T-shaped framework box structure of traditional prestressing force individual layer, construction costs can maintain an equal level or slightly reduce.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is structural plan of the present utility model arrangement diagram.
Fig. 2 is of the present utility model 1
#, 2
#Loop curve prestressing tendon section arrangement diagram.
Fig. 3 is of the present utility model 3
#, 4
#Loop curve prestressing tendon section arrangement diagram.
Fig. 4 is the 1-1 sectional drawing of Fig. 2.
Fig. 5 is the 1-1 sectional drawing of Fig. 3.
Among the figure 1.1
#The loop curve prestressing tendon, 2.2
#The loop curve prestressing tendon, 3.3
#The loop curve prestressing tendon, 4.4
#The loop curve prestressing tendon, 5.1
#, 3
#The reservation stretch-draw groove of loop curve prestressing tendon, 6.2
#, 4
#The reservation stretch-draw groove of loop curve prestressing tendon, 7. inside configuration space, 8. structural outer, 9. framework back timber/bottom girder, 10. in the middle of the ground tackle end that deviates from inside configuration, an end of ground tackle direction structure inside in the middle of 11., 12. middle ground tackle (title encircles anchor again, anchor moves about), 13. frame columns.
The specific embodiment
In Fig. 1,2,4,1
#Loop curve prestressing tendon (1) is a plane closed curve, is made of lay 18 prestress wires
#Loop curve prestressing tendon (1) is with 1
#The stretch-draw groove (5) of loop curve prestressing tendon (1) is reserved in framework back timber/bottom girder (9) apart from a near side of the natural axis quartile of end, when placing of concrete and after reaching prescribed strength, pass through middle ground tackle (12) with 1 at stretch-draw groove place (5)
#Each section head and the tail of loop curve prestressing tendon (1) are linked in sequence, and then carry out stretch-draw at middle ground tackle near the end (11) of inside configuration, after stretch-draw is complete on request shutoff stretch-draw groove (5) get final product.2
#The embodiment of loop curve prestressing tendon (2) is with 1
#Loop curve prestressing tendon (1).
In Fig. 1,3,5,3
#Loop curve prestressing tendon (3) is a plane closed curve, is made of lay 38 prestress wires
#Loop curve prestressing tendon (3) is with 3
#The stretch-draw groove (6) of loop curve prestressing tendon (3) is reserved in framework back timber/bottom girder (9) apart from a near side of the natural axis quartile of end, 1
#, 3
#The stretch-draw groove (5) and 2 of loop curve prestressing tendon
#, 4
#The stretch-draw groove (6) of loop curve prestressing tendon is arranged about the vertical plane of symmetry antisymmetry of framework, when placing of concrete and after reaching prescribed strength, passes through middle ground tackle (12) with 1 at stretch-draw groove place (5)
#Each section head and the tail of loop curve prestressing tendon (3) are linked in sequence, and then carry out stretch-draw at middle ground tackle near the end (11) of inside configuration, after stretch-draw is complete on request shutoff stretch-draw groove (6) get final product 3
#Loop curve prestressing tendon (3) is a plane closed curve.4
#The embodiment of loop curve prestressing tendon (4) is with 3
#Loop curve prestressing tendon (3).
Claims (6)
1. the T-shaped framework box structure of inner stretch-draw prestressing force concrete individual layer of a building, in parallel its section direction frame construction is set, form box section, Vierendeel girder span-depth radio scope is at 7～36 meters, presstressed reinforcing steel is set in framework, the stretch-draw groove is reserved in the stressed less frame facet of inside configuration, when placing of concrete and after reaching intensity, be linked in sequence by each section head and the tail of middle ground tackle with same Prestress tendon at stretch-draw groove place, then the end in the close inside configuration of middle ground tackle carries out stretch-draw, the complete rear shutoff stretch-draw groove of stretch-draw gets final product, it is characterized in that: the stretch-draw groove is reserved in the side of structural inner frame, stressed less position connects and tensioned prestressing bar by middle ground tackle.
2. the T-shaped framework box structure of inner stretch-draw prestressing force concrete individual layer according to claim 1, it is characterized in that: the structure cross section is the individual layer box-formed shape, and the Vierendeel girder span L is not less than 7 meters, and Vierendeel girder is T-shaped cross section, and frame spacing is not more than L/3.
3. the T-shaped framework box structure of inner stretch-draw prestressing force concrete individual layer according to claim 1, it is characterized in that: presstressed reinforcing steel is positive and negative parabolic distribution in the Vierendeel girder, the inflection point position is generally 0.08L～0.12L, the presstressed reinforcing steel that is arranged in frame column and the Vierendeel girder forms a loop curve, the prestressing tendon profile is consistent with bending moment diagram, near the tension edge placement.
4. the T-shaped framework box structure of inner stretch-draw prestressing force concrete individual layer according to claim 1, it is characterized in that: the bundle shape of presstressed reinforcing steel can be closed curve, also can be non-closed curve; If closed curve, without anchored end; If be non-closed curve, its end is anchored end.
5. the T-shaped framework box structure of inner stretch-draw prestressing force concrete individual layer according to claim 1 is characterized in that: in same Pin prestressed frame, the radical of every bundle presstressed reinforcing steel and prestressing tendon number, presstressed reinforcing steel are arranged about the vertical axis of symmetry of framework symmetrical.
6. the T-shaped framework box structure of inner stretch-draw prestressing force concrete individual layer according to claim 1, it is characterized in that: the stretch-draw groove is reserved in the stressed less side of Vierendeel girder; The spacing of same prestressing tendon preformed groove and middle ground tackle, its scope are 15～50 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220098372 CN202644842U (en) | 2012-03-15 | 2012-03-15 | Inner tension prestressed concrete single-layer T-shaped frame box structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220098372 CN202644842U (en) | 2012-03-15 | 2012-03-15 | Inner tension prestressed concrete single-layer T-shaped frame box structure |
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| Publication Number | Publication Date |
|---|---|
| CN202644842U true CN202644842U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220098372 Expired - Fee Related CN202644842U (en) | 2012-03-15 | 2012-03-15 | Inner tension prestressed concrete single-layer T-shaped frame box structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102653955A (en) * | 2012-03-15 | 2012-09-05 | 北京市轨道交通建设管理有限公司 | Inner tension prestressed concrete single-layer T-shaped frame box structure |
| CN105297612A (en) * | 2015-09-16 | 2016-02-03 | 浙江大学 | Method for improving integrality and durability of hollow slab frame bridge by adopting prestressing force |
-
2012
- 2012-03-15 CN CN 201220098372 patent/CN202644842U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102653955A (en) * | 2012-03-15 | 2012-09-05 | 北京市轨道交通建设管理有限公司 | Inner tension prestressed concrete single-layer T-shaped frame box structure |
| CN102653955B (en) * | 2012-03-15 | 2013-11-20 | 北京市轨道交通建设管理有限公司 | Inner tension prestressed concrete single-layer T-shaped frame box structure |
| CN105297612A (en) * | 2015-09-16 | 2016-02-03 | 浙江大学 | Method for improving integrality and durability of hollow slab frame bridge by adopting prestressing force |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20140315 |