CN104295001A - Variable cross-section pre-stress cant beam and construction process thereof - Google Patents
Variable cross-section pre-stress cant beam and construction process thereof Download PDFInfo
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Abstract
The invention relates to a variable cross-section pre-stress cant beam and a construction process thereof. The variable cross-section pre-stress cant beam is characterized by comprising a cant beam body, a lower end of the cant beam body is poured and connected to the upper end of a first layer of layer, the central part and the upper end of the cant beam body are poured and connected to a Y-shaped column; an I-shaped stiff steel rib and a pre-stress bellows are arranged in the cant beam body, the stiff steel rib is positioned at the center of the cant beam body, the number of the pre-stress bellows is four and the pre-stress bellows are respectively positioned at four angels of the stiff steel rib, the stiff steel rib is pulled by each pre-stress bellow; the cross section of the cant beam body is varied, width of the connection part of the cant beam body and the first layer of the column, the connection part of the connection part of the cant beam body and a third layer of the column, the connection part of the connection part of the cant beam body and a fourth layer of the column, the connection part of the center part and the cant beam body, the connection part of the cant beam body and the Y-shaped column, and the connection part of the cant beam body and the upper end part keeps consistency, and the thickness is determined according to the angle of the cant beam body, number of picking ear in each layer, tand he first layer of column and the Y-shaped column. The construction process guarantees the convenience of the pulling of the bellows and the pulling quality of pre-stress rib.
Description
Technical field
The invention belongs to variable cross-section prestressing force cant beam prestressed Construction Technology field, be specifically related to a kind of variable cross-section prestressing force cant beam and construction technology thereof.
Background technology
Wuhan optical valley international networks ball center 15000 main venue engineerings are " bowl-shape " stadiums supporting 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 declined beam that Y shape pillar is encorbelmented, and grandstand distance ground is high, span of encorbelmenting large, and cant beam Cross section Design size is large.Cant beam is originally as dip member, under the factor effect such as weight and working load of inclined member because of itself that space is overweight, larger horizontal thrust can be produced, and the horizontal thrust that cant beam produces here can increase along with the increase at angle of inclination, stressed unfavorable especially to scaffold (namely expiring hall frame) system.If will affect too small for cant beam angle of inclination the viewing sight line effect being positioned at top bleacherite.
During tradition pre-stress construction, the disposable lashing of bellows, in work progress, easily causes bellows breakage, blocking, causes later stage presstressed reinforcing steel lashing difficulty, or cannot lashing.And presstressed reinforcing steel lashing step is after bellows installation, lashing presstressed reinforcing steel, concreting, but cant beam is longer in this engineering, and be variable cross-section, presstressed reinforcing steel curve is inconsistent, namely presstressed reinforcing steel is worn after one section if constructed, cause presstressed reinforcing steel reserved longer, rear one section of bellows cannot lashing, and easily cause presstressed reinforcing steel to pollute, bend, the problem such as fracture.
During the construction of tradition cant beam, choose ear and generally construct as secondary structure: 1. the globality being unfavorable for choosing ear structure; 2. be unfavorable for the duration.And cant beam regards that the mode of beam carries out model sheetinstallat as: be 1. unfavorable for concreting; 2. pair support for shuttering requires higher, is unfavorable for the overall bearing load of support for shuttering; 3. cant beam upper surface concrete easily produces laitance, causes certain influence to workmanship.
Summary of the invention
For above-mentioned technical problem, the object of the present invention is to provide a kind of variable cross-section prestressing force cant beam and construction technology thereof, this cant beam can ensure the viewing sight line effect of upper strata spectators when angle of inclination is certain, can increase the intensity of cant beam body, and this construction technology ensure that the convenience of bellows lashing and the lashing quality of presstressed reinforcing steel.
For achieving the above object, the technical solution used in the present invention 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 with one deck column upper end and is connected, and the middle part of cant beam body and upper end are built with Y shape pillar and be connected; Described cant beam body both sides and cant beam body have been built simultaneously and have been chosen ear (be arranged with some choose 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 central, described prestressing force bellows has four, and lay respectively at four angles of stiffness reinforcing bar, the lashing of described each prestressing force bellows has presstressed reinforcing steel.
Described stiffness reinforcing bar is divided into multistage to be welded, and the angle of the hop count that concrete hop count and soldering angle are built according to cant beam body and cant beam body is determined; Described prestressing force bellows is divided into multistage to be formed by connecting, and the several hop count of building according to cant beam body of physical segment is determined.
On described cant beam body more up choose ear, the distance exceeding cant beam body upper surface is larger.
Described cant beam body is built by multistage and is formed.
The cross section of described cant beam body is change, cant beam body and one deck column junction, three layers are located, four layers are located, the width of middle part and Y shape pillar junction and upper end is consistent, and thickness is determined according to the size of the angle of cant beam body, every layer of number of choosing ear, one deck column and Y shape pillar.
The angle of described cant beam body is change, 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 construction technology of above-mentioned variable cross-section prestressing force cant beam, is characterized in that comprising the following steps:
The first step, builds front preparation: first according in advance to the segmentation of variable cross-section prestressing force cant beam, gets out the good stiffness reinforcing bar of corresponding template, segmentation and prestressing force bellows, and internal lining pipe and presstressed reinforcing steel; Full hall frame is set up again on the grandstand two-layer platform of sports palace;
Second step, concrete placings variable cross-section prestressing force cant beam first paragraph:
1. on full hall frame, oblique beam template is set up;
2. first paragraph stiffness reinforcing bar is installed, and colligation cant beam reinforcing bar and choose ear reinforcing bar;
3. Positioning first segment prestressing force bellows is installed, and inserts internal lining pipe therein;
4. to concreting in oblique beam template;
5. reach after some strength until concrete and remove oblique beam template, complete and build;
3rd step, repeats next section of second step concrete placings variable cross-section prestressing force cant beam;
4th step, concrete placings variable cross-section prestressing force cant beam final stage:
1. on full hall frame, oblique beam template is set up;
2. final stage stiffness reinforcing bar is installed, and colligation cant beam reinforcing bar and choose ear reinforcing bar;
3. location final stage prestressing force bellows is installed, and inserts internal lining pipe therein;
4. extract all internal lining pipes out, lashing presstressed reinforcing steel is carried out to whole section of variable cross-section prestressing force cant beam;
5. to concreting in oblique beam template;
6. reach after some strength until concrete and remove oblique beam template, complete and build.
1. step in described second step and the 4th step includes following steps:
A. first, full hall frame set up cant beam soffit formwork and choose eardrum template;
B. secondly, cant beam side template is installed and chooses ear side template;
C. again, choose ear install one additional and choose ear top template every one, the ear of choosing that each lower end of choosing ear top template is provided with a bar shaped vibrates hole;
D. last, cant beam top template is installed, on cant beam top template with choose ear corresponding position, hole of vibrating and be provided with cant beam and vibrate hole.
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 processes to vibrate along cant beam hole of vibrating, and whether build put in place by the cant beam hole observation concrete that vibrates, then vibrate to choosing ear by choosing ear hole of vibrating.
The invention has the beneficial effects as follows:
(1) the present invention designs the viewing sight line effect that can ensure upper strata spectators on the top (exceeding cant beam certain distance) of cant beam when angle of inclination is certain by choosing ear.And this construction technology ensure that the convenience of bellows lashing and the lashing quality of presstressed reinforcing steel: the method carries out segmentation installation to prestressing force bellows, and install internal lining pipe (lined pipe additional, mainly prevent from, when cant beam variable cross-section, the change of slope genetic method, adopting internal lining pipe to carry out filling to prestressing force bellows and preventing prestressing force bellows from blocking; When also can prevent from building, cement paste enters in prestressing force bellows simultaneously), be conducive to the convenience that bellows is installed, ensure that bellows installation quality, avoid the situations such as bellows breakage; After presstressed reinforcing steel treats cant beam construction, disposable lashing, ensure that presstressed reinforcing steel lashing quality, situations such as avoiding presstressed reinforcing steel lashing difficulty or cannot lashing, the prestressing force also avoiding first lashing presstressed reinforcing steel to cause pollutes, bend, fracture;
(2) the built-in stiffness reinforcing bar of cant beam body and prestressing force bellows in the present invention, can increase the intensity of cant beam body;
(3) in the present invention, stiffness reinforcing bar and prestressing force bellows are segmental structure, it can be made to install simple and convenient, better disposable lashing and protection presstressed reinforcing steel;
(4) on the body of cant beam described in the present invention more up choose ear, the distance exceeding cant beam body upper surface is larger, and the visual effect of spectators can be made more excellent;
(5) in the present invention, the angle of cant beam body and cross section are all changes, can adaptation requirement of engineering more also, engineering demands;
(6) in construction technology of the present invention by cant beam with choose ear and build simultaneously, decrease working procedure; And installed cant beam top template additional, solve the difficult point that can produce concrete accumulation bottom cant beam concrete placings, and avoid 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 processes to vibrate, and observe concrete material full level by hole of vibrating; Part chooses ear concrete material when cannot be full of, and hole of vibrating can be utilized to increase concrete material;
(7) construction technology of the present invention will choose ear and cant beam synchronous construction, decrease working procedure; The method carries out segmentation concrete placings to cant beam, efficiently solves the problem that cant beam horizontal thrust is excessive; And oblique beam template is totally-enclosed, only reserved hole of vibrating, shortens the time of cant beam concrete placings, solves the difficult point that can produce concrete accumulation bottom cant beam concrete placings, and avoids cant beam surface generation laitance, ensure that oblique beam structure quality, improves the overall look and feel of concrete.
Accompanying drawing explanation
Fig. 1 is variable cross-section prestressing force cant beam overall structure schematic diagram.
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 frame of 8-, 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, and 15-cant beam vibrates hole, and 16-chooses ear and to vibrate hole.
Detailed description of the invention
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with Wuhan optical valley international networks ball center 15000 main venue engineering construction examples, but content of the present invention is not only confined to the following examples.
As Figure 1-5, 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 with one deck column 3 upper end and is connected, and the middle part of cant beam body 1 and upper end are built with Y shape pillar 4 and be connected; Described cant beam body 1 both sides (along its length) and cant beam body have been built simultaneously and have been chosen ear (be arranged with some choose ear) 2; Described ear 2 (upper right corner) 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, the lashing of described each prestressing force bellows 7 has presstressed reinforcing steel (described presstressed reinforcing steel often restraints steel strand 9, steel strand specification 15.20mm);
The cross section of described cant beam body 1 is change, cant beam body 1 and one deck column 3 junction (1000mm × 1000mm), three layers are located (1000mm × 1200mm), four layers are located (1000mm × 1400mm) [until N layer place], the width of middle part and Y shape pillar 4 junction (1000mm × 1800mm) and upper end (1000mm × 2400mm) is consistent, and thickness is determined according to the size of the angle of cant beam body 1, every layer of number of choosing ear 2, one deck column 3 and Y shape pillar 4.
Described stiffness reinforcing bar 6 is divided into multistage to be welded, the angle of the hop count that concrete hop count and soldering angle are built according to cant beam body 1 and cant beam body 1 determines 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 to be formed by connecting, and the several hop count of building according to cant beam body 1 of physical segment is determined.
On described cant beam body 1 more up choose ear 2, exceed the distance larger (choose ear 2 and exceed the distance of cant beam body 1 upper surface generally at 0-130mm) of cant beam body 1 upper surface.
The angle of described cant beam body 1 is that (change here refers to the angle change of cant beam body 1 itself in change, be exactly concretely: when cant beam body 1 runs into every layer of ring beam 5 angle first become mild, crossed with the junction of ring beam 5 after return to original angle or steeper, the angle more up recovered 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 above-mentioned variable cross-section prestressing force cant beam, comprises the following steps:
The first step, build front preparation: first according in advance to the segmentation of variable cross-section prestressing force cant beam, get out 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 (by stiffness reinforcing bar 6 and prestressing force bellows 7 segmental machining good, and bind nameplate, nameplate is indicated 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 full hall frame 8[again equitable subsection is carried out to variable cross-section prestressing force cant beam: 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); 3rd section be in the middle part of four-layer structure plate face to cant beam with Y shape pillar intersection bottom surface (21.047m); 4th section is that 21.047m is to prestressed ring beam (600mm × 1100mm) beam face (22.548m); 5th section is 22.548m to five layer of ring beam (500mm × 900mm) soffit (24.500m); 6th section is that 24.500m is to five-layer structure plate face (25.400m)];
Second step, concrete placings variable cross-section prestressing force cant beam first paragraph (namely bottom a section):
1. on full hall frame 8, oblique beam template is set up;
2. first paragraph stiffness reinforcing bar 6 (first paragraph stiffness reinforcing bar 6 lower end is fixedly connected on one deck column 3) is installed, and colligation cant beam reinforcing bar and choose ear reinforcing bar;
Positioning first segment prestressing force bellows 7 (carry out pre-buried position to it after installation, absolute altitude, fixed mass, joint quality, tube wall check) is 3. installed, and inserts internal lining pipe therein;
4. to concreting in oblique beam template;
5. reach (after the intensity of energy form removal) after some strength until concrete and remove oblique beam template, complete and build;
3rd step, repeat next section of second step concrete placings variable cross-section prestressing force cant beam (when connecting and stiffness reinforcing bar 6 and the prestressing force bellows 7 of next section is installed, first clean prestressing force bellows 7 pipe end and be about 50mm length, then on both adhesive surfaces, layer of adhesive is coated uniformly with hairbrush, again prestressing force bellows 7 is inserted the birdsmouth of connecting tube, knock gently, make prestressing force bellows 7 all insert birdsmouth, must not rotate again or take tubing apart after about two minutes);
4th step, concrete placings variable cross-section prestressing force cant beam final stage:
1. on full hall frame 8, oblique beam template is set up;
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 inserts internal lining pipe therein;
4. extract all internal lining pipes out, lashing presstressed reinforcing steel is carried out to whole section of variable cross-section prestressing force cant beam;
5. to concreting in oblique beam template;
6. to reach after some strength (can the intensity of form removal after) until concrete and remove oblique beam template, complete and build (when concrete strength reaches 1000% of design strength, enter stretching construction operation, grouting behind shaft or drift lining sealing off and covering anchorage).Steam vent (steam vent is generally arranged on horn mouth backing plate) is set at these cant beam two ends and span centre, part is double to be done grout hole (grout hole is used for cement grouting in pipeline, aperture is generally not less than 16mm, steam vent is to ensure that in duct, air-flow is with smooth), and before presstressed reinforcing steel does not penetrate prestressing force bellows 7, to be communicated with prestressing force bellows 7 by steam vent by stack and to be connected, prestressing force bellows 7 and stack junction marine glue paper bag wrap.Will regulate the presstressed reinforcing steel length at these cant beam two ends during lashing, 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 often the lashing of 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 when manually wearing presstressed reinforcing steel, conveniently penetrate from prestressing force bellows 7, reducing friction resistance also avoids presstressed reinforcing steel to expose prestressing force bellows 7, makes lashing work more smooth.By presstressed reinforcing steel, single or bunchy penetrates in prestressing force bellows 7, and stretching end exposes 1.0m, mouth of pipe cement bag paper jam-pack, and prevent cement paste and curing water from flowing into, the presstressed reinforcing steel gummed paper of exposed parts wraps, and prevents from corroding presstressed reinforcing steel.Presstressed reinforcing steel lashing adopts the traction of whole bundle, and first tightened presstressed reinforcing steel end, put hinging device for cable-stayed bridge, by the lead-in wire of hinging device for cable-stayed bridge through duct, pull in front end, rear end is sent in duct, till Len req (60cm) is exposed at two ends.The presstressed reinforcing steel put 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 numbering symmetry inspection of the every root steel strand in two ends, symmetry;
The lower end (lower end of cant beam body 1) of first paragraph is built with one deck column 3 upper end and is connected, 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 with Y shape pillar 4 respectively and is connected.
1. step in described second step and the 4th step includes following steps:
A. first, full hall frame 8 is set up cant beam soffit formwork 9 and chooses eardrum template 12 [soffit choosing ear top template 14 exceeds this section of upper surface building up the cant beam body of type to be poured, chooses ear 2 and exceed cant beam body 1 upper surface certain distance (as 1-130mm) described in making];
B. secondly, cant beam side template 11 is installed and chooses ear side template 13;
C. again, choose ear 2 every one to install one additional and choose ear top template (14), each lower end of choosing ear top template (14) be provided with a bar shaped choose ear vibrate hole 16 (described cant beam vibrates hole 15 and choose ear and vibrate that hole 16 is double does venthole, 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 corresponding position, hole 16 of vibrating and be provided with cant beam and vibrate hole 15.
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 processes to vibrate along cant beam hole 15 of vibrating, and observe concrete whether build putting in place by cant beam hole 15 of vibrating, then vibrate to choosing ear 2 by choosing ear hole 16 of vibrating.
Claims (9)
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 with one deck column (3) upper end and is connected, and the middle part of cant beam body (1) and upper end are built with Y shape pillar (4) and be connected; 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 (6) of described cant beam body (1) 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), the lashing of described each prestressing force bellows (7) 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 to be welded, the angle of the hop count that concrete hop count and soldering angle are built according to cant beam body (1) and cant beam body (1) is determined; Described prestressing force bellows (7) is divided into multistage to be formed by connecting, and the several hop count of building according to cant beam body (1) of physical segment is 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 exceeding 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 by multistage and formed.
5. variable cross-section prestressing force cant beam according to claim 1, it is characterized in that: the cross section of described cant beam body is change, cant beam body and one deck column junction, three layers are located, four layers are located, the width of middle part and Y shape pillar junction and upper end is consistent, and thickness is determined according to the size of the angle of cant beam body, every layer of number of choosing ear, one deck column and Y shape pillar.
6. variable cross-section prestressing force cant beam according to claim 1, it is characterized in that: the angle of described cant beam body (1) is change, and 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.
7. the construction technology of variable cross-section prestressing force cant beam as claimed in claim 1, is characterized in that comprising the following steps:
The first step, builds front preparation: first according in advance to the segmentation of variable cross-section prestressing force cant beam, gets out the good stiffness reinforcing bar (6) of corresponding template, segmentation and prestressing force bellows (7), and internal lining pipe and presstressed reinforcing steel; Full hall frame (8) is set up again on the grandstand two-layer platform of sports palace;
Second step, concrete placings variable cross-section prestressing force cant beam first paragraph:
1. on full hall frame (8), oblique beam template is set up;
2. first paragraph stiffness reinforcing bar (6) is installed, and colligation cant beam reinforcing bar and choose ear reinforcing bar;
3. Positioning first segment prestressing force bellows (7) is installed, and inserts internal lining pipe in the inside of prestressing force bellows;
4. to concreting in oblique beam template;
5. reach after some strength until concrete and remove oblique beam template, complete and build;
3rd step, repeats next section of second step concrete placings variable cross-section prestressing force cant beam;
4th step, concrete placings variable cross-section prestressing force cant beam final stage:
1. on full hall frame (8), oblique beam template is set up;
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 inserts internal lining pipe therein;
4. extract all internal lining pipes out, lashing presstressed reinforcing steel is carried out to whole section of variable cross-section prestressing force cant beam;
5. to concreting in oblique beam template;
6. reach after some strength until concrete and remove oblique beam template, complete and build.
8. the construction technology of variable cross-section prestressing force cant beam according to claim 7, is characterized in that: 1. the step in second step and the 4th step includes following steps:
A. first, full hall frame (8) set up cant beam soffit formwork (9) and choose eardrum template (12);
B. secondly, cant beam side template (11) is installed and chooses ear side template (13);
C. again, choose ear (2) install one additional and choose ear top template (14) every one, the ear of choosing that each lower end of choosing ear top template (14) is provided with a bar shaped vibrates hole (16);
D. last, cant beam top template (10) is installed, cant beam top template (10) upper with choose ear hole (16) corresponding position of vibrating and be provided with cant beam and vibrate hole (15).
9. the construction technology of variable cross-section prestressing force cant beam according to claim 8, it is characterized in that: in 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 processes to vibrate along cant beam hole (15) of vibrating, and whether build put in place by cant beam hole (15) the observation concrete that vibrates, then vibrate to choosing ear (2) by choosing ear hole (16) of vibrating.
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| CN105298126A (en) * | 2015-10-23 | 2016-02-03 | 中冶东北建设（沈阳）工程技术有限公司 | Method for high-formwork construction of large-diameter oval oblique-cone structure |
| CN106245770A (en) * | 2016-08-31 | 2016-12-21 | 中国建筑第八工程局有限公司 | Expanded letter variable cross-section annular stiff beam construction method |
| 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 |
| CN111236656A (en) * | 2020-01-14 | 2020-06-05 | 中国建筑第八工程局有限公司 | Reinforcing steel bar binding method for intersection node of stand beam column |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105298126A (en) * | 2015-10-23 | 2016-02-03 | 中冶东北建设（沈阳）工程技术有限公司 | Method for high-formwork construction of large-diameter oval oblique-cone structure |
| CN106245770A (en) * | 2016-08-31 | 2016-12-21 | 中国建筑第八工程局有限公司 | Expanded letter variable cross-section annular stiff beam construction method |
| CN106245770B (en) * | 2016-08-31 | 2018-09-04 | 中国建筑第八工程局有限公司 | Expanded letter variable cross-section annular stiffness beam construction method |
| 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 |
| CN111236656A (en) * | 2020-01-14 | 2020-06-05 | 中国建筑第八工程局有限公司 | Reinforcing steel bar binding method for intersection node of stand beam column |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104295001B (en) | 2016-04-27 |
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