CN204001418U - Variable cross-section prestressing force cant beam - Google Patents
Variable cross-section prestressing force cant beam Download PDFInfo
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- CN204001418U CN204001418U CN201420481185.8U CN201420481185U CN204001418U CN 204001418 U CN204001418 U CN 204001418U CN 201420481185 U CN201420481185 U CN 201420481185U CN 204001418 U CN204001418 U CN 204001418U
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Abstract
The utility model relates to a kind of variable cross-section prestressing force cant beam.Variable cross-section prestressing force cant beam, is characterized in that: it mainly comprises cant beam body, and the lower end of cant beam body is built and is connected with one deck column upper end, and middle part and the upper end of cant beam body are built and are connected with Y shape pillar; Described cant beam body both sides and cant beam body have been built simultaneously and have been chosen ear, described in choose ear and exceed cant beam body upper surface; The built-in I-shaped stiffness reinforcing bar of described cant beam body and prestressing force bellows, described stiffness reinforcing bar is positioned at cant beam body center, described prestressing force bellows has four, lays respectively at four angles of stiffness reinforcing bar, and the lashing of described each prestressing force bellows has presstressed reinforcing steel.What this cant beam ensured upper strata spectators in the situation that of can be certain at angle of inclination watches sight line effect, can increase the intensity of cant beam body.
Description
Technical field
The utility model belongs to variable cross-section prestressing force cant beam technical field, is specifically related to a kind of variable cross-section prestressing force cant beam.
Background technology
15000 main venue engineerings of Wuhan optical valley international networks ball center are " bowl-shape " stadiums that support Stand Inclined Beams composition with 32 Y shape pillars.Engineering structures is relatively complicated, and grandstand is owing to being stepped form, and its underpart supporting construction form is more, and this Engineering Network arena grandstand supporting construction is the declined beam of encorbelmenting on Y shape pillar, and grandstand is high apart from ground, the span of encorbelmenting is large, and cant beam Cross section Design size is large.Cant beam is originally as dip member, under the factor such as weight and the working load effect of inclined member because of itself that space is overweight, can produce larger horizontal thrust, and the horizontal thrust that cant beam produces here can increase along with the increase at angle of inclination, stressed unfavorable especially to scaffold (i.e. full hall frame) system.If by too small cant beam angle of inclination will affect be positioned at top bleacherite watch sight line effect.
When tradition pre-stress construction, the disposable lashing of bellows, in work progress, easily causes bellows breakage, obstruction, causes later stage presstressed reinforcing steel lashing difficulty, or cannot lashing.And presstressed reinforcing steel lashing step be bellows install after, lashing presstressed reinforcing steel, concreting, but cant beam is longer in this engineering, and be variable cross-section, presstressed reinforcing steel curve is inconsistent, after one section, wear presstressed reinforcing steel if constructed, cause presstressed reinforcing steel reserved longer, rear one section of bellows cannot lashing, and easily causes the problems such as presstressed reinforcing steel pollutes, bends, fractures.
When the construction of tradition cant beam, choose ear and generally construct as secondary structure: 1. the globality that is unfavorable for choosing ear structure; 2. be unfavorable for the duration.And cant beam is regarded the mode of beam as and is carried out template installation: be unfavorable for concreting 1.; 2. pair support for shuttering is had relatively high expectations, and is unfavorable for the overall bearing load of support for shuttering; 3. cant beam upper surface concrete easily produces laitance, and workmanship has been caused to certain influence.
Summary of the invention
For above-mentioned technical problem, the purpose of this utility model is to provide a kind of variable cross-section prestressing force cant beam, and what this cant beam ensured upper strata spectators in the situation that of can be certain at angle of inclination watches sight line effect, can increase the intensity of cant beam body.
For achieving the above object, technical solution adopted in the utility model is:
Variable cross-section prestressing force cant beam, is characterized in that: it mainly comprises cant beam body, and the lower end of cant beam body is built and is connected with one deck column upper end, and middle part and the upper end of cant beam body are built and are connected with Y shape pillar; Described cant beam body both sides and cant beam body have been built simultaneously and have been chosen ear, described in choose ear and exceed cant beam body upper surface; The built-in I-shaped stiffness reinforcing bar of described cant beam body and prestressing force bellows, described stiffness reinforcing bar is positioned at cant beam body center, described prestressing force bellows has four, lays respectively at four angles of stiffness reinforcing bar, and the lashing of described each prestressing force bellows has presstressed reinforcing steel.
Described stiffness reinforcing bar is divided into multistage and is welded, and the hop count that concrete hop count and soldering angle are built according to cant beam body and the angle of cant beam body are determined; Described prestressing force bellows is divided into multistage and is formed by connecting, and the several hop counts of building according to cant beam body of physical segment are determined.
The described ear of choosing exceeds cant beam body upper surface certain distance.
On described cant beam body more up choose ear, the distance that exceeds cant beam body upper surface is larger.
Described cant beam body is built and is formed by multistage.
The cross section of described cant beam body changes, cant beam body and one deck column junction, three layers locate, the width of four layers of place, middle part and Y shape pillar junction and upper end is consistent, thickness is determined according to the angle of cant beam body, every layer of size of choosing number, one deck column and the Y shape pillar of ear.
The angle of described cant beam body changes, and the concrete angle of cant beam body and every layer of ring beam junction is determined according to the size of the number of plies and ring beam.
The beneficial effects of the utility model are:
(1) the utility model ensures that by choosing ear design upper strata spectators' watches sight line effect can be certain at angle of inclination on the top (exceeding cant beam certain distance) of cant beam in the situation that.
Ensure the lashing quality of convenience and the presstressed reinforcing steel of bellows lashing: prestressing force bellows is carried out to segmentation installation, and install internal lining pipe (lined pipe additional, be mainly to prevent in the time that cant beam variable cross-section, slope genetic method change, adopt internal lining pipe to fill and prevent that prestressing force bellows from stopping up prestressing force bellows; Also can prevent from building time, cement paste enters in prestressing force bellows simultaneously), be conducive to the convenience that bellows is installed, ensure bellows installation quality, avoid the situations such as bellows breakage; After presstressed reinforcing steel is treated cant beam construction, disposable lashing, has ensured presstressed reinforcing steel lashing quality, has avoided presstressed reinforcing steel lashing difficulty or cannot lashing, the prestressing force of also avoiding first lashing presstressed reinforcing steel the to cause situation such as pollute, bend, fracture;
(2) the built-in stiffness reinforcing bar of cant beam body and prestressing force bellows in the utility model, can increase the intensity of cant beam body;
(3) in the utility model, stiffness reinforcing bar and prestressing force bellows are segmental structure, can make its installation simple and convenient, better disposable lashing and protection presstressed reinforcing steel;
(4) on the body of cant beam described in the utility model more up choose ear, the distance that exceeds cant beam body upper surface is larger, can make spectators' visual effect more excellent;
(5) in the utility model, the angle of cant beam body and cross section all change, the adaptation requirement of engineering that can more go back, engineering demands;
(6) the utility model by cant beam with choose ear and build simultaneously, has reduced working procedure; And installed cant beam top template additional, and solve cant beam concrete and built the difficult point that bottom meeting generation concrete is piled up, and avoided cant beam top due to the generation laitance that vibrates, improve overall look and feel and the structural safety of concrete; Concrete closely knit for ensureing, adopt and catch up with slurry method to vibrate, and observe concrete material full level by the hole of vibrating; When part is chosen ear concrete material and cannot be full of, can utilize the hole of vibrating to increase concrete material;
(7) the utility model will be chosen ear and cant beam synchronous construction, reduce working procedure; The method is carried out segmentation concrete to cant beam and is built, and efficiently solves the excessive problem of cant beam horizontal thrust; And oblique beam template is totally-enclosed, only the reserved hole of vibrating, has shortened the time that cant beam concrete is built, and has solved cant beam concrete and has built the difficult point that bottom meeting generation concrete is piled up, and avoided cant beam surface to produce laitance, has ensured oblique beam structure quality, has improved the overall look and feel of concrete.
Brief description of the drawings
Fig. 1 is the overall structure schematic diagram of the utility model variable cross-section prestressing force cant beam.
Fig. 2 is the schematic cross-section of cant beam body.
Fig. 3 is the elevational schematic view of cant beam body in the closed template construction technique of variable cross-section prestressing force cant beam.
Fig. 4 is the schematic cross-section of cant beam body in the closed template construction technique of variable cross-section prestressing force cant beam.
Fig. 5 is the schematic top plan view of cant beam body in the closed template construction technique of variable cross-section prestressing force cant beam.
In figure: 1-cant beam body, 2-chooses ear, 3-one deck column, 4-Y type post, 5-ring beam, 6-stiffness reinforcing bar, 7-prestressing force bellows, the full hall of 8-frame, 9-cant beam soffit formwork, 10-cant beam top template, 11-cant beam side template, 12-chooses eardrum template, 13-chooses ear side template, 14-chooses ear top template, the 15-cant beam hole of vibrating, and 16-chooses the ear hole of vibrating.
Detailed description of the invention
In order to understand better the utility model, further illustrate content of the present utility model below in conjunction with 15000 main venue engineering construction examples of Wuhan optical valley international networks ball center, but content of the present utility model is not only confined to the following examples.
Variable cross-section prestressing force cant beam, it mainly comprises cant beam body 1 (length 29.5m), and the lower end of cant beam body 1 is built and is connected with one deck column 3 upper ends, and the middle part of cant beam body 1 and upper end are built and are connected with Y shape pillar 4; Described cant beam body 1 both sides (along its length) have been built simultaneously and have been chosen ear 2 (being arranged with some ears of choosing) with cant beam body; The described ear 2 (bight, upper right) of choosing exceeds cant beam body 1 upper surface certain distance (as 1-130mm);
The built-in I-shaped stiffness reinforcing bar 6 of described cant beam body 1 and prestressing force bellows 7, described stiffness reinforcing bar 6 is positioned at cant beam body 1 center, described prestressing force bellows 7 has four, lay respectively at four angles of stiffness reinforcing bar 6, described each prestressing force bellows 7 lashings have presstressed reinforcing steel (9 of the every bundle steel strand of described presstressed reinforcing steel, steel strand specification 15.20mm);
The cross section of described cant beam body 1 changes, cant beam body 1 and one deck column 3 junctions (1000mm × 1000mm), three layers locate (1000mm × 1200mm), four layers of width of locating (1000mm × 1400mm) [until N layer place], middle part and Y shape pillar 4 junctions (1000mm × 1800mm) and upper end (1000mm × 2400mm) are consistent, thickness is chosen the size of number, one deck column 3 and Y shape pillar 4 of ear 2 according to the angle of cant beam body 1, every layer definite.
Described stiffness reinforcing bar 6 is divided into multistage and is welded, the hop count that concrete hop count and soldering angle are built according to cant beam body 1 and the angle of cant beam body 1 determine that (described stiffness reinforcing bar 6 is I-shaped reinforcing bar, the wide 600mm of reinforcing bar, the wide 300mm of frange plate, the thick 25mm of steel plate, entire length 29.5m);
Described prestressing force bellows 7 is divided into multistage and is formed by connecting, and the several hop counts of building according to cant beam body 1 of physical segment are determined.
On described cant beam body 1 more up choose ear 2, the distance that exceeds cant beam body 1 upper surface larger (choose distance that ear 2 exceeds cant beam body 1 upper surface generally at 1-130mm).
The angle of described cant beam body 1 is that (the variation here refers to that the angle of cant beam body 1 own changes in variation, be exactly concretely: what when cant beam body 1 runs into every layer of ring beam 5, angle first became is mild, cross with the junction of ring beam 5 and returned to original angle or steeper afterwards, the angle of more up recovering is steeper), cant beam body 1 is determined according to the size of the number of plies and ring beam 5 with the concrete angle of every layer of ring beam 5 junction.
The construction technology of variable cross-section prestressing force cant beam, comprises the following steps:
The first step, build front preparation: first according to the segmentation to variable cross-section prestressing force cant beam in advance, be ready to corresponding template (cant beam soffit formwork 9, cant beam top template 10, cant beam side template 11, choose eardrum template 12, choose ear side template 13 and choose ear top template 14), the good stiffness reinforcing bar 6 of segmentation and prestressing force bellows 7 be (by good to stiffness reinforcing bar 6 and prestressing force bellows 7 segmental machining, and bind nameplate, on nameplate, indicate the marks such as numbering, position), and internal lining pipe and presstressed reinforcing steel; On the grandstand two-layer platform of sports palace, set up again full hall frame 8[variable cross-section prestressing force cant beam is carried out to equitable subsection: first paragraph is that the two-layer structure section of encorbelmenting (9.420m) is to three layer construction plate face (11.510m); Second segment is that three layer construction plate face is to four-layer structure plate face (15.990m); The 3rd section is that four-layer structure plate face is to cant beam middle part and Y shape pillar intersection bottom surface (21.047m); The 4th section is that 21.047m is to prestressed ring beam (600mm × 1100mm) beam face (22.548m); The 5th section is 22.548m to five layer of ring beam (500mm × 900mm) soffit (24.500m); The 6th section is that 24.500m is to five-layer structure plate face (25.400m)];
Second step, concrete is built variable cross-section prestressing force cant beam first paragraph (bottom a section):
1. on full hall frame 8, set up oblique beam template;
First paragraph stiffness reinforcing bar 6 (first paragraph stiffness reinforcing bar 6 lower ends are fixedly connected on one deck column 3) is 2. installed, and colligation cant beam reinforcing bar and choose ear reinforcing bar;
Location first paragraph prestressing force bellows 7 (after installation, it being carried out to pre-buried position, absolute altitude, fixed mass, joint quality, tube wall checks) is 3. installed, and is inserted internal lining pipe therein;
4. to concreting in oblique beam template;
5. after concrete reaches some strength, (after the intensity of energy form removal) removes oblique beam template, completes and builds;
The 3rd step, repeat second step concrete and build next section of variable cross-section prestressing force cant beam (when connecting and the stiffness reinforcing bar 6 of next section and prestressing force bellows 7 being installed, first clean the about 50mm of prestressing force bellows 7 pipe end long, then on both adhesive surfaces, coat uniformly layer of adhesive with hairbrush, again prestressing force bellows 7 is inserted to the birdsmouth of connecting tube, knock gently, make prestressing force bellows 7 all insert birdsmouth, after approximately two minutes, must not rotate again or take apart tubing);
The 4th step, concrete is built variable cross-section prestressing force cant beam final stage:
1. on full hall frame 8, set up oblique beam template;
2. final stage stiffness reinforcing bar 6 is installed, and colligation cant beam reinforcing bar and choose ear reinforcing bar;
3. location final stage prestressing force bellows 7 is installed, and is inserted internal lining pipe therein;
4. extract all internal lining pipes out, whole section of variable cross-section prestressing force cant beam is carried out to lashing presstressed reinforcing steel;
5. to concreting in oblique beam template;
6. after concrete reaches some strength, remove oblique beam template, complete and build (until concrete strength reach design strength 1000% time, enter stretching construction operation, grouting behind shaft or drift lining sealing off and covering anchorage).At these cant beam two ends and span centre steam vent (steam vent operated by rotary motion is on horn mouth backing plate) is set, part is double to be done grout hole (grout hole is for to pipeline cement grouting, aperture is generally not less than 16mm, steam vent is in order to ensure in duct that air-flow is with smooth), and before presstressed reinforcing steel does not penetrate prestressing force bellows 7, stack is communicated with and is connected with prestressing force bellows 7 by steam vent, and prestressing force bellows 7 wraps with marine glue paper bag with stack junction.When lashing, will regulate the presstressed reinforcing steel length at these cant beam two ends, in the presstressed reinforcing steel Transducers Embedded in Concrete at two ends, length is generally 400～600mm, and stretching end active length is generally 800～1000mm, can not be too short in order to avoid affect prestressed stretch-draw.Presstressed reinforcing steel front puts bullet-headed shell cap or with plastic adhesive tape parcel, conveniently penetrates from prestressing force bellows 7; After the lashing of every bundle presstressed reinforcing steel completes, at prestressing force pull end, spiral bar and anchor plate are installed in time.Presstressed reinforcing steel lashing adopts artificial lashing mode: sub warhead shaped steel cap or wrap up with plastic adhesive tape on online headgear while manually wearing presstressed reinforcing steel, conveniently penetrate from prestressing force bellows 7, capable of reducing friction resistance also avoids presstressed reinforcing steel to expose prestressing force bellows 7, makes lashing work more smooth.Single presstressed reinforcing steel or bunchy are penetrated in prestressing force bellows 7, and stretching end exposes 1.0m, and mouth of pipe cement bag paper jam-pack prevents that cement paste and curing water from flowing into, and the presstressed reinforcing steel of exposed parts wraps with gummed paper, prevents from corroding presstressed reinforcing steel.Presstressed reinforcing steel lashing adopts whole bundle traction, first presstressed reinforcing steel end is tightened, and puts hinging device for cable-stayed bridge, and the lead-in wire of hinging device for cable-stayed bridge, through duct, is pulled at front end, and rear end is sent in duct, until Len req (60cm) is exposed at two ends.The presstressed reinforcing steel of putting on should be straight, middle without kink phenomenon, in case affect the accuracy of prestressing.After Prestress tendon is put on, should penetrate in ground tackle by the symmetrical inspection of the numbering of the every steel strand in two ends, symmetry.
The lower end (lower end of cant beam body 1) of first paragraph is built and is connected with one deck column 3 upper ends, and the upper end of the 3rd section or the 4th section (middle part of cant beam body 1) and the 6th section is built and is connected with Y shape pillar 4 respectively.
1. step in described second step and the 4th step includes following steps:
A. first, on full hall frame 8, set up cant beam soffit formwork 9 and choose soffit that eardrum template 12[chooses ear top template 14 this section of upper surface that exceeds the cant beam body that builds up type to be poured, described in making, choose ear 2 and exceed cant beam body 1 upper surface certain distance (as 1-130mm)];
B. secondly, cant beam side template 11 be installed and chosen ear side template 13;
C. again, choosing ear 2 every one installs one additional and chooses ear top template (14), each lower end of choosing ear top template (14) be provided with a bar shaped choose ear vibrate hole 16 (vibrate hole 15 and choose the ear double venthole that does in hole 16 that vibrates of described cant beam, be of a size of 200mm wide × deck-siding);
D. last, cant beam top template 10 is installed, on cant beam top template 10 with choose ear 16 corresponding positions, hole of vibrating and be provided with the cant beam hole 15 of vibrating.
In described second step step 4. or/and in the 4th step step be 5. specially: pour into concrete by oblique beam template upper port, first adopt and catch up with slurry method to vibrate along the cant beam hole 15 of vibrating, and observe concrete whether build putting in place by the cant beam hole 15 of vibrating, then vibrate to choosing ear 2 by choosing the ear hole 16 of vibrating.
Claims (4)
1. variable cross-section prestressing force cant beam, it is characterized in that: it mainly comprises cant beam body (1), the lower end of cant beam body (1) is built and is connected with one deck column (3) upper end, and the middle part of cant beam body (1) and upper end are built and are connected with Y shape pillar (4); Described cant beam body (1) both sides and cant beam body have been built simultaneously and have been chosen ear (2), described in choose ear (2) and exceed cant beam body (1) upper surface; The built-in I-shaped stiffness reinforcing bar of described cant beam body (1) (6) and prestressing force bellows (7), described stiffness reinforcing bar is positioned at cant beam body (1) center, described prestressing force bellows (7) has four, lay respectively at four angles of stiffness reinforcing bar (6), described each prestressing force bellows (7) lashing has presstressed reinforcing steel.
2. variable cross-section prestressing force cant beam according to claim 1, it is characterized in that: described stiffness reinforcing bar (6) is divided into multistage and is welded, the hop count that concrete hop count and soldering angle are built according to cant beam body (1) and the angle of cant beam body (1) are determined; Described prestressing force bellows (7) is divided into multistage and is formed by connecting, and the several hop counts of building according to cant beam body (1) of physical segment are determined.
3. variable cross-section prestressing force cant beam according to claim 1, is characterized in that: described cant beam body (1) upper more up choose ear (2), the distance that exceeds cant beam body (1) upper surface is larger.
4. variable cross-section prestressing force cant beam according to claim 1, is characterized in that: described cant beam body (1) is built and formed by multistage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420481185.8U CN204001418U (en) | 2014-08-25 | 2014-08-25 | Variable cross-section prestressing force cant beam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420481185.8U CN204001418U (en) | 2014-08-25 | 2014-08-25 | Variable cross-section prestressing force cant beam |
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| CN204001418U true CN204001418U (en) | 2014-12-10 |
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| CN201420481185.8U Expired - Fee Related CN204001418U (en) | 2014-08-25 | 2014-08-25 | Variable cross-section prestressing force cant beam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295001A (en) * | 2014-08-25 | 2015-01-21 | 浙江省一建建设集团有限公司 | Variable cross-section pre-stress cant beam and construction process thereof |
| CN110295771A (en) * | 2018-03-23 | 2019-10-01 | 上海展冀膜结构有限公司 | A kind of mounting process for stadiums grandstand |
-
2014
- 2014-08-25 CN CN201420481185.8U patent/CN204001418U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295001A (en) * | 2014-08-25 | 2015-01-21 | 浙江省一建建设集团有限公司 | Variable cross-section pre-stress cant beam and construction process thereof |
| CN104295001B (en) * | 2014-08-25 | 2016-04-27 | 浙江省一建建设集团有限公司 | The construction technology of variable cross-section prestressing force cant beam |
| CN110295771A (en) * | 2018-03-23 | 2019-10-01 | 上海展冀膜结构有限公司 | A kind of mounting process for stadiums grandstand |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20160825 |
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| CF01 | Termination of patent right due to non-payment of annual fee |