CN102425114B - Construction method of support formwork and scaffold supporting structure for elevated framework pillar-continuous beam - Google Patents
Construction method of support formwork and scaffold supporting structure for elevated framework pillar-continuous beam Download PDFInfo
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- CN102425114B CN102425114B CN 201110410240 CN201110410240A CN102425114B CN 102425114 B CN102425114 B CN 102425114B CN 201110410240 CN201110410240 CN 201110410240 CN 201110410240 A CN201110410240 A CN 201110410240A CN 102425114 B CN102425114 B CN 102425114B
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Abstract
The invention discloses a support formwork and scaffold supporting structure for elevated framework pillar-continuous beam and a construction method thereof. The supporting structure is a suspension type supporting structure arranged below a cross beam of the framework pillar and comprises suspension rods, wherein the upper parts of the suspension rods are fixed on the cross beam of the frameworkpillar in a penetrating way and are distributed in a section, which is positioned just below the continuous beam, of the cross beam of the framework pillar, two rows of suspension rods are arranged at a large mileage and a small mileage of the cross beam of the framework pillar respectively, a suspension beam is commonly connected with the bottom of each row of the suspension rods in a penetrating way, and bailey beams are erected on the two suspension beams along the direction of the continuous beam. By adopting the supporting structure, the problem that existing lines are occupied during construction of small-angle and large-span overline continuous beams is solved, the construction of a beam body supporting frame completely depends on a newly-completed entity project and is free from unfavorable factors of a construction environment, influence on the existing lines is lower, the construction progress is accelerated, the construction cost is reduced, and the construction quality is improved.
Description
Technical field
The present invention relates to a kind of job practices of the braced structures for cast-in-situ continuous beam construction, specifically, relate to a kind of job practices of the formwork falsework braced structures for framework pier-continuous beam.
Background technology
In bridge construction, when newly-built line and existing line oblique angle is less and oblique section when longer, adopt continuous beam-framework pier constructure scheme more.Usually adopt floor stand construction method for the construction of continuous beam beam body this moment, namely adopts steel pipe scaffold or helix tube and i iron to form the post and beam support.When adopting above-mentioned rack construction continuous beam beam body, had relatively high expectations in the strutting system basis, be subjected to the restriction of practice of construction factors such as the pier shaft height is higher, basic condition is relatively poor simultaneously, strutting system takies more to existing line, construction is bigger to circuit driving influence on system operation, the cost height.
Summary of the invention
The present invention will solve is low-angle, take the technical problem of existing line when striding footpath cross-line Construction of continuous beam greatly, the job practices of a kind of overhead framework pier-continuous beam formwork falsework braced structures is provided, the entity project that can make the construction of beam body carriage place one's entire reliance upon and newly finish, and be not subjected to the restriction of construction environment unfavorable factor, less to the existing line influence, and accelerating construction progress, reduction construction cost, improve construction quality.
In order to solve the problems of the technologies described above, the present invention is achieved by following technical scheme:
The job practices of a kind of overhead framework pier-continuous beam formwork falsework braced structures, carry out according to following steps:
1. at the large and small mileage of framework pier crossbeam the pre-buried duct of one row's suspension centre is set respectively during pouring frame pier crossbeam concrete, the pre-buried duct of every row's suspension centre be arranged in this place corresponding continuous beam beam body under in the zone,
2. install suspension rod in the pre-buried duct, framework pier crossbeam end face adopts backing plate in the suspension rod position, uses the double nut fixed derrick on the backing plate;
3. with row's suspension rod lower end the suspention beam is being installed, the suspension rod at a two ends connects the suspention beam, will suspend stable the slinging of beam in midair and get final product;
4. divide assembly Bei Leiliang on ground;
5. respectively organize and lift after the assembly unit of shellfish thunder beam finishes, direction across bridge lifting during lifting shellfish thunder beam winches to the suspention beam and uses pull rope that Bei Leiliang is transferred to when above to indulge bridge to suspention, in rotary course Bei Leiliang is penetrated and is fixed on above the suspention beam between the suspension rod;
6. behind the rigging out remaining suspension rod penetrated the suspention beam and fix.
The invention has the beneficial effects as follows:
The present invention's works that newly-built line is built that places one's entire reliance upon supports from body, is not subjected to the restriction of job site geographical environment, and difficulty of construction is less, construction quality is high.Particularly at low-angle, stride footpath newly-built circuit and existing line greatly and intersect the long operating mode of section, to existing line influence less, progress is fast, cost is low; The used Bei Leiliang that constructs of the present invention simultaneously can shift to an earlier date assembling at the scene, and is simple, convenient, thus further accelerating construction progress.
Description of drawings
Fig. 1 is the cross-line layout schematic diagram of newly-built line and existing line;
Fig. 2 is the structural representation of suspension braced structures;
Fig. 3 pushes up down and the lateral view of setting up that suspends convolution braced structures and lower top type braced structures in midair;
Fig. 4 pushes up down and the lateral view of setting up that suspends convolution braced structures and suspension braced structures in midair;
Fig. 5 is the front view of setting up of lower top type braced structures;
Fig. 6 pushes up down and the front view of setting up that suspends the convolution braced structures in midair;
Fig. 7 is that pre-buried duct in the suspension braced structures is at the distribution schematic diagram of framework pier crossbeam;
Fig. 8 be down the pre-buried duct in top and the suspention convolution braced structures at the distribution schematic diagram of frame end crossbeam;
Fig. 9 is the fixed installation schematic diagram of suspension rod on framework pier crossbeam;
Figure 10 is the partial enlarged drawing of Fig. 9.
Among the figure: 1: existing line, 2: newly-built line, 3: pier between connection, 4: the framework pier, 5: framework pier crossbeam, 51: solid section, 52: hollow section, 6: scaffold, 7: framework pier pier stud, 8: suspension rod, 9: Bei Leiliang, 10: the suspention beam, 11: timber wedge, 12: to pull bar, 13: Bei Leizhu, 14: cushion cap, 15: i iron, 16: pre-buried duct, 17: distribution beam, 18: needle beam, 19: backing plate, 20: continuous beam beam body, 21: nut.
The specific embodiment
The present invention is described in further detail below in conjunction with drawings and Examples:
Simplified schematic as Fig. 1, when less and oblique section is longer when newly-built line 2 and existing line 1 oblique angle, pier 3 between framework pier 4 and connection is arranged in beyond existing line 1 road width of cloth, at framework pier 4 pier studs rigid beam is set, the continuous beam of newly-built line 2 is set at framework pier crossbeam 5.Particularly, when newly-built line 2 was projected in outside the existing line 1, newly-built line 2 did not need to use framework pier 4 forms, and newly-built line 2 beam bodies place between connection on the Dun3Dun top fully; When half is positioned at outside half is positioned on the existing line 1 when newly-built line 2 upright projections, because pier shaft is arranged in outside existing line 1 road width of cloth, this moment, newly-built line 2 beam bodies can not stand on Dun Ding fully, and some is projected in beyond the Dun Ding, so pier form of structure changes, adopt framework pier 4; When newly-built line 2 upright projections on existing line 1 beam body, this moment newly-built line 2 beam bodies will place on the framework pier crossbeam 5; Along with the continuation of newly-built line 2 is extended, its projection become again a part at framework pier crossbeam 5 last branches on framework Dun4Dun top; When newly-built line 2 beam bodies strode across existing line 1 beam body, newly-built line 2 beam bodies can stand on the pier top fully, and no longer adopt framework pier 4 and adopt pier 3 between connection this moment.
When newly-built line 2 upright projections are on existing line 1, all or part of being positioned on the framework pier crossbeam 5 of newly-built line 2 beam bodies.For reducing newly-built line 2 Construction of continuous beam to the influence of existing line 1, the invention discloses a kind of overhead framework pier-continuous beam formwork falsework braced structures, this braced structures is arranged at framework pier crossbeam 5 belows, can be referred to as the suspension braced structures.Penetrate suspension rod 8 at framework pier crossbeam 5 and cooperate suspention beam 10, lay shellfish thunder beam 9 along newly-built line 2 line directions, continuous beam beam body 20 is supported.
As shown in Figure 2, the suspension braced structures comprises a plurality of suspension rods of being made by fining twisted steel 8, and suspension rod 8 is distributed in framework pier crossbeam 5 and is positioned at section under the continuous beam beam body 20, and framework pier crossbeam 5 is fixed in its top cross-under.Suspension rod 8 respectively arranges a row at the large and small mileage of framework pier crossbeam 5, a suspention of each row's the common cross-under in suspension rod 8 bottoms beam 10, and two suspention beams 10 are fixedly arranged at such two row's suspension rod bottoms.Be erected with the shellfish thunder beam 9 that arranges along the continuous beam direction above two suspention beams 10.
To shown in Figure 6, above-mentioned suspension braced structures is applied in newly-built line 2 and crosses in the construction of existing line 1, adopts different braced structuress at different positions as Fig. 3:
(1) when newly-built line 2 is projected in outside the existing line 1, newly-built line 2 beam bodies place between connection on the Dun3Dun top fully, pier 3 pier shafts one side arranges shellfish thunder post 13 between the connection of continuous beam beam body 20 belows, and shellfish thunder post 13 tops are erected with shellfish thunder beam 9, are referred to as the lower top type braced structures.
(2) when newly-built line 2 upright projections half be positioned on the existing line 1, when half is positioned at outside the existing line 1, pier adopts framework pier 4.Continuous beam beam body 20 parts are stood on Dun Ding, a part places on the framework pier crossbeam 5, so braced structures that adopts lower top type to be combined with suspension, pier 3 pier shaft both sides arrange the lower top type braced structures between the connection below the continuous beam beam body 20, and in framework pier crossbeam 5 sections of continuous beam beam body 20 below correspondences the suspension braced structures are set.Be erected with shellfish thunder beam 9 jointly on the shellfish thunder post 13 of lower top type braced structures and the suspention beam 10 of suspension braced structures.
(3) when newly-built line 2 upright projections are fully on existing line 1, continuous beam beam body 20 will place on the framework pier crossbeam 5, only adopt the suspension braced structures that is arranged at framework pier crossbeam 5 belows to get final product.
In the braced structures of above-mentioned (2) and (3), along with the continuous incision of 2 pairs of existing line 1 angles of newly-built line, continuous beam beam body 20 is at the relative position of framework pier crossbeam 5 also corresponding changing.Because of the suspention beam 10 hoisting point position all the time under the continuous beam beam body 20 of newly-built line 2, so hoisting point position also changes simultaneously with continuous beam beam body 20.As shown in Figure 7, the pre-buried duct 16 of suspension centre in the suspension braced structures respectively arranges a row at the large and small mileage of frame end crossbeam 5, each row is provided with eight according to construction load, and layout is divided equally along the central lines of track of newly-built line 2 continuous beam beam bodies 20 in eight pre-buried ducts 16 of suspension centre.As shown in Figure 8, following top also respectively arranges a row at the large and small mileage of framework pier crossbeam 5 with the pre-buried duct 16 of suspension centre of suspending in midair in the convolution braced structures, and each row arranges some according to construction load and continuous beam beam body 20.
As Fig. 9 and shown in Figure 10 because there be solid section 51 in framework pier crossbeam 5 and hollow section 52, suspension centre be positioned at solid section 51 o'clock, the beam face at suspension rod 8 places arranges three layers of backing plate 19, and is fixing by double nut 21 again.When suspension centre was positioned at hollow section 52, for disperseing suspension centre for the pressure of framework pier crossbeam 5, employing is two, and [18 channel-section steels were as distribution beam 17.For improving its holistic resistant behavior, to filling up a steel plate as needle beam 18, on needle beam again fill up 2cm steel plate as pad 19 simultaneously at distribution beam 17 vertical bridges, adopt double nut 21 fixing at last.
The job practices of suspension braced structures is as follows in the present embodiment:
1. pouring frame pier crossbeam 5 concrete respectively arrange the pre-buried duct 16 of suspension centre of eight Φ 48 at framework pier crossbeam 5 large and small mileages.The pre-buried duct 16 of suspension centre be arranged in this place corresponding continuous beam beam body 20 under in the zone, on different framework pier crossbeams 5, gradually change along with the continuous incision of 2 pairs of existing line 1 angles of newly-built line, every row also divides equally along the circuit center line in pre-buried duct 16.
2. install Φ 32 fining twisted steels in the pre-buried duct 16 as suspension rod 8, framework pier crossbeam 5 end faces adopt backing plate 19 in the suspension rod position, use double nut 21 fixed derricks 21 on the backing plate.As the hollow section 52 of 16 positions, pre-buried duct at framework pier crossbeam 5, arrange between the beam face of hollow section 52 and backing plate 19 then that two [18 elongated channel-section steels are as the distribution beam 17 of suspension centre, and vertical bridge is to placing needle beam 18 on the distribution beam 17.
3. before Bei Leiliang 9 liftings, at first suspention beam 10 is installed, in that a suspention beam 10 is installed with row's suspension rod 8 lower ends, suspended in midair 10 suspension rods 8 that connect two ends of beam this moment, can be got final product by stable slinging.
4. carrying out the assembly unit of shellfish thunder beam 9 on ground, is one group with every 2-3 row.
5. respectively organizing the shellfish thunder beam 9 assembly units back that finishes uses the 50t crane to lift, direction across bridge lifting shellfish thunder beam 9, winch to suspention beam 10 and use pull rope that shellfish thunder beam 9 is transferred to when above to indulge bridge to suspention, in rotary course, shellfish thunder beam 9 penetrated and be placed on above the suspention beam 10 between the suspension rod 8.
6. behind the rigging out remaining suspension rod 8 penetrated suspention beam 10 and fix, will be positioned at simultaneously between the shellfish thunder beam 9 of framework pier crossbeam 5 belows and crossbeam with the hardwood filling, hardwood is positioned over shellfish thunder sheet node place.
Sketch construction application of the present invention below for example:
Load and condition of construction according to continuous beam beam body 20 are determined working load, adopt permissible stress method design support system, will guarantee during design that each member of support system and bulk strength, rigidity and stability all satisfy construction requirement;
Set up support system, the sequence of construction between the braced structures of being combined with suspension comprising lower top type braced structures, suspension braced structures and lower top type, three kinds of braced structuress is not done restriction, organizes according to on-the-spot practice of construction situation:
(1) when newly-built line 2 orthography fully outside existing line 1 the position, pier 3 supports continuous beam beam bodies 20 between connection, adopts above-mentioned lower top type braced structures, directly adopts 13 pairs of shellfish thunders of shellfish thunder post beam 9 to support.Pier 3 pier shafts one side assembly unit shellfish thunder post 13 between the connection below the continuous beam beam body 20, shellfish thunder post 13 are divided into and two-layerly up and down carry out assembly unit, and bottom 9m is one deck, and all the other shellfish thunder sheets of top are one deck, and column shellfish thunder sheet is one group with three to four rows, carries out assembly unit on ground.Each assembly assembly unit back that finishes adopts the 25t crane to lift, lower floor's shellfish thunder post 13 rigging outs and be connected firmly after carry out upper strata Bei Leizhu 13 assembly units.Utilize the original template of pier 3 pier shafts between connection that pulling eye is carried out shellfish thunder post 13 and pier shaft to drawing, with timber wedge 11 jam-packs, timber wedge 11 reaches pull bar 12 is arranged at shellfish thunder sheet node place between shellfish thunder post 13 and pier shaft.Set up two I25 i iron 15 as the strutting system lower transverse beam at shellfish thunder post 13, can fill up the steel plate of different-thickness on the crossbeam and regulate shellfish thunder beam absolute altitude, i iron 15 is arranged at shellfish thunder sheet node place.
(2) when newly-built line 2 orthography fully with existing line 1 intersect the position, framework pier 4 support continuous beam beam bodies 20 adopt above-mentioned suspension braced structures, construction sequence is the same.
(3) when newly-built line 2 orthography part outside existing line 1, part and existing line 1 intersect the position, framework pier 4 supports continuous beam beam bodies 20, the braced structures that adopts above-mentioned lower top type to be combined with suspension.Concrete erection method is identical with method among (one), (two) respectively.
Above-mentioned three kinds of braced structuress will be carried out suspension rod 8 pre-stretch-draw after setting up, and namely every fining twisted steel are carried out the pre-stretch-draw of 25t pulling force, creep with the strutting system that improves its tensile strength and eliminate after loading.
Lay the bamboo offset plate in Bei Leiliang 9 upper surfaces, and use iron wire to be connected with shellfish thunder beam 9, to prevent that article drop to existing line in the work progress.
Lay full framing at Bei Leiliang 9, spacing 0.6m laterally lays 15 * 15cm flitch on Bei Leiliang, and use U-bolt fixedly flitch on Bei Leiliang 9, wood put set up spacing in length and breadth spacing be 0.6 * 0.6m bowl fastening type scaffold 6, and do sweep the floor bar and bridging with the 48mm steel pipe.
Lay continuous beam beam body 20 templates at scaffold 6.
Above the strutting system strong point, reach span centre observation point 3 places respectively are set, on template, keep flat prefabricating load by designing requirement.Be specially: loaded value is 50% of beam body weight for the first time; Loaded value is 80% of beam body weight for the second time; Loaded value is 120% of beam body weight for the third time.The variation of simultaneous observation absolute altitude in the loading procedure, per hour observation once reaches the prefabricating load value and is no less than 72 hours, and adjacent twice observation value difference levels off to zero, and to be considered as support stable, can be the unloading successively symmetrically of overbottom pressure material.
At last, carry out the beam body construction.
Technical scheme of the present invention can effectively solve because the crossing angle of newly-built line and existing line is less, and overlapping area is bigger, takies the construction difficult problem of existing line during construction, reaches the purpose of accelerating construction progress, reduction construction cost, raising construction quality.
Although by reference to the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, can also make the concrete conversion of a lot of forms, these all belong within protection scope of the present invention.
Claims (1)
1. the job practices of overhead framework pier-continuous beam formwork falsework braced structures is characterized in that, carries out according to following steps:
1. at the large and small mileage of framework pier crossbeam the pre-buried duct of one row's suspension centre is set respectively during pouring frame pier crossbeam concrete, the pre-buried duct of every row's suspension centre be arranged in this place corresponding continuous beam beam body under in the zone;
2. install suspension rod in the pre-buried duct, framework pier crossbeam end face adopts backing plate in the suspension rod position, uses the double nut fixed derrick on the backing plate;
3. with row's suspension rod lower end the suspention beam is being installed, the suspension rod at a two ends connects the suspention beam, will suspend stable the slinging of beam in midair and get final product;
4. divide assembly Bei Leiliang on ground;
5. respectively organize and lift after the assembly unit of shellfish thunder beam finishes, direction across bridge lifting during lifting shellfish thunder beam winches to the suspention beam and uses pull rope that Bei Leiliang is transferred to when above to indulge bridge to suspention, in rotary course Bei Leiliang is penetrated and is fixed on above the suspention beam between the suspension rod;
6. behind the rigging out remaining suspension rod penetrated the suspention beam and fix.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110410240 CN102425114B (en) | 2011-12-09 | 2011-12-09 | Construction method of support formwork and scaffold supporting structure for elevated framework pillar-continuous beam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110410240 CN102425114B (en) | 2011-12-09 | 2011-12-09 | Construction method of support formwork and scaffold supporting structure for elevated framework pillar-continuous beam |
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| CN102425114A CN102425114A (en) | 2012-04-25 |
| CN102425114B true CN102425114B (en) | 2013-08-21 |
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| CN107090975B (en) * | 2017-05-26 | 2020-06-26 | 中建五局第三建设有限公司 | Formwork erecting construction method for ultrahigh large-span concrete cast-in-place beam bailey truss |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2258657C2 (en) * | 1972-11-30 | 1974-09-26 | Dyckerhoff & Widmann Ag, 8000 Muenchen | Carrier element for the production of equipment carriers |
| ES2352023B2 (en) * | 2008-04-03 | 2011-09-22 | Structural Research, S.L. | ASSEMBLY PROCEDURE FOR PREFABRICATED CONCRETE DINTELS. |
| CN101368371A (en) * | 2008-09-26 | 2009-02-18 | 中铁十二局集团第二工程有限公司 | Cast-in-situ continuous beam construction method for special railway line stands |
| CN101736692A (en) * | 2008-11-20 | 2010-06-16 | 中铁十六局集团有限公司 | Construction technology for passenger railway line spanning existing railway cast-in-place box beam bracket |
| CN101476291B (en) * | 2009-01-21 | 2011-04-06 | 中铁一局集团有限公司 | Segment-assembling simply supported box girder movable falsework construction method |
| CN202359505U (en) * | 2011-12-09 | 2012-08-01 | 中国建筑第六工程局有限公司 | Elevated frame pier-continuous beam formwork falsework support structure |
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