CN1510225A - Method for constructing Y shape pillar and suspended declined beam - Google Patents

Method for constructing Y shape pillar and suspended declined beam Download PDF

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Publication number
CN1510225A
CN1510225A CNA021541094A CN02154109A CN1510225A CN 1510225 A CN1510225 A CN 1510225A CN A021541094 A CNA021541094 A CN A021541094A CN 02154109 A CN02154109 A CN 02154109A CN 1510225 A CN1510225 A CN 1510225A
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CN
China
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declined
floor
column
shape pillar
scaffold
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CNA021541094A
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Chinese (zh)
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CN1215236C (en
Inventor
戈祥林
杨俊�
陈新
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中国建筑第八工程局中南公司
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Priority to CN 02154109 priority Critical patent/CN1215236C/en
Publication of CN1510225A publication Critical patent/CN1510225A/en
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Publication of CN1215236C publication Critical patent/CN1215236C/en

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Abstract

A construction method for Y-shaped column and overhung great inclined beam features that the Y-shaped column and the overhung great inclined beam are segmented and each segment is constructed along with its connected floor slab, beam, column and other concrete structure by concreting at same time to integrate them as a whole to bear the axial pressure and horizontal push force generated by the dead weight of said great inclined beam. Its scaffold is the combination of multifunctional one and ordinary one.

Description

The job practices of the Y shape pillar and the declined beam of encorbelmenting

Technical field

The invention belongs to building beam column job practices, especially have the job practices of the building beam column of the declined beam of encorbelmenting.

Background technology

Along with the progress in epoch, the design of heavy construction is more and more noveler, the various up-to-date scientific achievements of a large amount of employings in the design, and revolutionary approach emerges in an endless stream.The overhanging type declined beams that adopt in the design of large-scale stadium more, the declined beam absolute altitude in this design can be nearly 40 meters, long nearly ten meters of the part of encorbelmenting, it makes stadiums tall and straight, magnificence, majestic appearance is broken out.Simultaneously, the design of these novelties has proposed stern challenge also for the construction of stadiums has brought all difficult problems to the building operations industry.Huge encorbelments beam in work progress, and axial compression and horizontal thrust that the concrete deadweight produces all are huge, leans on the template of conventional method and other support system to contend with, and difficulty is very big, and safety factor is not high, and with high costs.

Summary of the invention

At a difficult problem of the prior art, the purpose of this invention is to provide a kind of Y shape pillar and the job practices of the declined beam of encorbelmenting, it can guarantee construction safety, can guarantee workmanship again, can also greatly save construction fund.

The object of the present invention is achieved like this: the job practices of the Y shape pillar and the declined beam of encorbelmenting, comprise the conventional reinforcing bar of rolling, install template, template is provided with support system outward, fluid concrete, the demoulding, operations such as concrete curing, its special feature is: described concrete pouring has adopted a kind of segmentation to unite the method for construction, being about to Y shape pillar upwards is divided into several sections with the declined beam of encorbelmenting by ground and carries out concrete pouring successively, every section is adjacent the floor that connects, beam, post and other concrete structure gang be casting and constructing simultaneously, they is connected to each other is one, resists axial compression and horizontal thrust that the declined beam deadweight produces jointly; Described template outer support system is to adopt bowl fastening type multifunction scaffold and common fastener scaffold to cooperate the scaffold joint system of forming, by the calculating to declined beam deadweight and horizontal thrust the density degree of scaffold is set, the allowable stress that guarantees every vertical rod is greater than its vertical transmission load that should carry; After the scaffold joint system is put up, carry out bearing test earlier, carry out concrete pouring again after according to result of the test sedimentation or displacement being adjusted.

The segmentation of the segmentation combined construction method that concrete pouring of the present invention is adopted and the mode of associating following (shown in band circle numeral in the accompanying drawing 1):

First section, Y shape pillar column, side column and floor beam column by in the 5-10mm height at the bottom of the floor beam of ground to two;

Second section, Y shape pillar column, side column and two room floors by in first section upper surface to two layer floor face height;

The 3rd section, by beam, post, the floor of Y shape pillar column, side column and one deck grandstand in the 5-10mm height under second section upper surface to four layer beam;

The 4th section, by the Y shape pillar column in four layers of floor face height of the 3rd section upper surface to the and the 4th layer of beam and floor, side column and the 3rd floor column and floor;

The 5th section, by the hypomere of the 4th section upper surface to declined beam;

The 6th section, stick 20-25mm by the 4th section upper surface to Y shape pillar branch;

The 7th section, by the Y shape pillar inside bifurcated of the 6th section upper surface to the height of declined beam bottom surface;

The 8th section, declined beam interlude;

The 9th section, by the Y shape pillar outside bifurcated of the 6th section upper surface to the height of declined beam bottom surface;

The tenth section, declined beam epimere.

Job practices can be constructed for described the 7th section and the 9th section simultaneously, the side column in the 4th section and the construction of the 3rd floor column and floor can with the 3rd section carry out simultaneously.

In the described scaffold joint system, the Y shape pillar bifurcated adopts common fastener type steel pipe scaffold with the declined beam support of encorbelmenting partly in interior i.e. end; The encorbelment template of declined beam view field of Y shape pillar support to adopt wrist button multifunction scaffold, and horizon bar adopts two steel pipes, two fastener to fix; Up at the bottom of beam slab hoop and longitudinal axis support are set from two-layer platform, hoop supports whenever to stride the 3-5 road is set, and up adds 2-4 road horizontal support from bifurcated, vertical support top and cant beam support rail banding, bottom and scaffold horizon bar banding; Every 2-6 strides a shearing support is set.

Job practices of the present invention is to create from the enforcement of the concrete engineering of the newly designed Y shape pillar and the declined beam of encorbelmenting, the method that construction is united in segmentation is to calculate according to the stressing conditions science to member, the method of creating out after the analysis, Y type column, end bay post and relevant floor, floor joist, story post and other concrete structure are constructed simultaneously and are made Y type column, end bay post and floor etc. fuse, declined beam deadweight column and the axial compression of side column and the difficult problem of horizontal thrust have been solved, declined beam is divided into three sections constructions, has guaranteed that being perfectly safe of construction is reliable.The construction scaffolding of the part of encorbelmenting has adopted the up-to-date wrist button multifunction scaffold of developing, and this scaffold building is convenient, fixation, not yielding, and the position has carried out encrypt being provided with on Y type bifurcated, has guaranteed the construction quality of declined beam and safe and reliable; Adopt the use that matches with wrist button scaffold of common steel pipe scaffold in the part of not encorbelmenting of declined beam, saved the engineering spending.The bearing test that carries out before the declined beam construction, the slight dip and the displacement that have in time solved support system have guaranteed the accurate positioning of declined beam, for advantage has been created in next procedure.

Description of drawings

Accompanying drawing 1 is the Y shape pillar and the declined beam construction segmentation situation schematic diagram of encorbelmenting;

Accompanying drawing 2 is Y shape pillar and declined beam support system schematic diagram;

Accompanying drawing 3 is 1-1 generalized sections of accompanying drawing 2;

Accompanying drawing 4 is hoop, radial support schematic diagram.

Accompanying drawing acceptance of the bid keep the score state as follows: 1---the Y shape pillar column; 2---edge column; 3---the declined beam hypomere; 4---the declined beam stage casing; 5---the declined beam epimere; 6---crotch; 7---interior bifurcated; 8---outer bifurcated; 9---constuction joint; 10---four floor beams; 11---two floor plates; 12---three floor plates; 13---four floor plates; 14---one deck grandstand; 15---one deck grandstand column; 16---elongated scaffold; 17---two fasteners; 18---shearing support (per four stride be provided with); 19---two vertical rods; 20---the hoop Support Position; 21---the radial support position; 22---shelf is set up the place; 23---the floor beam column.

The specific embodiment

Below in conjunction with accompanying drawing and embodiment the specific embodiment of the present invention is described in further detail.Certain stadium engineering is the engineering of national the third-largest scale, and its engineering adopts Y shape pillar, staged declined beam as the primary structure supporting system.Shown in the accompanying drawing 1-4, the high 13.7m of Y shape pillar vertical section, tiltedly fork place absolute altitude is respectively 20.5m and 27.9m, and the column section maximum is 1000 * 5618mm, 56 concrete columns support whole grandstands and superstructure by the staged cant beam, the axially long 40m of declined beam is non-uniform beam, and its maximum cross-section is 1200 * 2840mm, the absolute altitude minimum point of declined beam is 12.70m, peak is 37.03m, and the inclination angle is 33.13 degree, and the length of encorbelmenting is 8.68m.

First difficult point of the construction of this Y shape pillar and staged declined beam is: how to keep out axial compression that the deadweight of concrete in the concrete construction produces the declined beam bottom and the horizontal thrust bending moment of end bay post (promptly to).Practical Calculation obtains: axial force F=1.2 * 2.84 * 2500 * 40 * sin α=186724kg ≈ 1867KN that the concrete deadweight produces; Horizontal shear force to end bay post top is N=F * cos α=1561KN.To this, the present inventor has proposed the method for section construction according to the principle of " wearing high heels ", and the order of section construction is shown in the numerical order of band circle in the accompanying drawing 1; The post of each section, beam and concrete floor, floor joist, story post etc. are constructed simultaneously, they are connected as a single entity, the horizontal thrust that produces when resisting the declined beam concrete construction jointly.After last section concrete reaches certain intensity when horizontal thrust (produce when promptly being enough to resist the declined beam concrete construction), the concrete of its upper segment of constructing again can guarantee that being perfectly safe of declined beam concrete construction is reliable.Declined beam is divided into upper, middle and lower again constructs for three sections, and by this method construction, when the 8th section construction (declined beam middle-end), the horizontal thrust of its generation is reduced to: N=1.2 * 2.84 * 2500 * 19 * sin α * cos α=74148kg ≈ 742KN.According to design load, when concrete pouring was 3 days the length of time, the shearing resistance on end bay post top was about F=1000 * 1600 * 1.677=2683KN; Shearing resistance F>horizontal thrust N, structural safety.

Second difficult point of the construction of this Y shape pillar and staged declined beam is: balance declined beam top how, the horizontal thrust that the part of promptly encorbelmenting produces in concrete construction.The method that the present inventor takes is: set up all round victory scaffold with φ 48 * 3.5 scaffold tubes, vertical pole ' s span and cross bar array pitch are set up in two kinds of situation; The first is in position that this workshop section produces the power maximum of toppling---the wrist button multifunction scaffold of the template employing latest scientific research in the declined beam view field of encorbelmenting, its support interval: Vierendeel girder and ring beam are that 300 * 600 deck-siding directions are 300, the beam length direction is 600), the vertical rod step pitch is 1800 below the Y shape pillar bifurcated, is 900 more than the bifurcated.Its horizon bar is connected the two steel pipes of employing with the concrete column that has watered, two fasteners are fixed.For guaranteeing the monolithic stability of support body, from two-layer platform hoop and vertical support radially are set up at axis in length and breadth at the bottom of the beam slab, hoop supports whenever to stride four roads is set, the steel pipe spacing is φ 48 * 3.5@1500 * 1500, from bifurcated three road horizontal supports are set up simultaneously, the steel pipe spacing is φ 48 * 3.5@3000 * 3000, vertical support top and cant beam support rail banding, bottom and scaffold horizon bar banding.Two to be Y shape pillar bifurcateds adopt the common steel tube scaffold with the support of the declined beam of the interior part of not encorbelmenting for it.

As follows to above scheme checking computations:

The deadweight (get comparatively big section beam section) of tiltedly playing the leading role: q=1.2 * 2.84 * 2500=8.52t/m

Being converted to the horizontal projection load is: q1=q/cos33.13 °=10.19t/m

Template deadweight (in 30kg/m2) is converted to the horizontal projection load and is:

q2=(1.2+2.84×2)×0.03/cosα=0.24t/m

Setting up of scaffold is vertical pole ' s span 0.3m, array pitch 0.6m, and step pitch 1.8m, to get 1m * 2m be that the unit calculates, the vertical rod height is got 25.0m, then:

q3=[(25.2×7+2.5×7+15×0.6)×3.84+7×16×1.5]/0.6=1.58t/m

The construction live load is got q4=300kg/m

The vertical transmission load of every vertical rod in the scaffold:

N1=1/7[1.2(q1+q2+q3)+1.4q4]×0.6=1.27t

The vertical rod checking computations: u gets 1.25, L=uL0=1.25 * 180=225cm, and r=1.58cm,

F=205N/mm2; Table look-up φ=0.337

The allowable stress of every vertical rod is:

[N]=φ Af=0.337 * 489 * 205=33782N=3.35T>N1 meets the demands

Whether carry out bearing test before the construction declined beam, eliminate initial deformation first, second checking has displacement.With the bundled reinforcing bar that is equivalent to concrete, template weight, load in batches and carry out precompressed, check result is not found the displacement situation, and the sedimentation of 0.5~1.3cm is only arranged, and formally pours into a mould after the adjustment.Check after the form removal and do not find obvious sedimentation.

Present embodiment shows that above scheme has guaranteed construction safety, has guaranteed workmanship, has reached the requirement of clear-water concrete, and the concrete declined beam is not subjected to displacement, and also in allowed band, component surface is clear, attractive in appearance for amount of deflection, corner angle are upright.

Method of the present invention is applicable to the construction of the large-scale treatment of the earth that similarly has encorbelment declined beam and Y type column.

Claims (4)

1, the job practices of the Y shape pillar and the declined beam of encorbelmenting, comprise and roll reinforcing bar, install template, template is provided with support system outward, fluid concrete, the demoulding, operations such as concrete curing, it is characterized in that: described concrete pouring adopts segmentation to unite the method for construction, being about to Y shape pillar upwards is divided into several sections with the declined beam of encorbelmenting by ground and carries out concrete pouring successively, every section is adjacent the floor that connects, beam, post and other concrete structure gang be casting and constructing simultaneously, they is connected to each other is one, resists axial compression and horizontal thrust that the declined beam deadweight produces jointly; Described template outer support system is to adopt bowl fastening type multifunction scaffold and common fastener scaffold to cooperate the scaffold joint system of forming, by the calculating to declined beam deadweight and horizontal thrust the density degree of scaffold is set, the allowable stress that guarantees every vertical rod is greater than its vertical transmission load that should carry; After the scaffold joint system is put up, carry out bearing test earlier, carry out concrete pouring again after according to result of the test sedimentation or displacement being adjusted.
2, job practices according to claim 1, it is characterized in that: the segmentation of the segmentation combined construction method that described concrete pouring is adopted is by upwards progressively segmentation of ground, unite and be meant that concrete structure that each section is adjacent is united and carry out concrete pouring that the mode of its segmentation and associating is as follows:
First section, by Y shape pillar column (1), side column (2) and floor beam column (23) in the 5-10mm height at the bottom of ground to two floor (11) beam;
Second section, Y shape pillar column (1), side column (2) and two layers of floor face (11) by in first section upper surface to two layer floor face height;
Beam, post, the floor (14,15) of the 3rd section, Y shape pillar column (1), side column (2) and one deck grandstand by in the 5-10mm height under second section upper surface to four layer beam;
The 4th section, by the Y shape pillar column (1) in four layers of floor face height of the 3rd section upper surface to the and the 4th floor beam (10) and floor (13), side column (2) and the 3rd floor column and floor (12);
The 5th section, by the hypomere (3) of the 4th section upper surface to declined beam;
The 6th section, go up 20-25mm by the 4th section upper surface to Y shape pillar bifurcated (6);
The 7th section, by the Y shape pillar inside bifurcated (7) of the 6th section upper surface to the height of declined beam bottom surface;
The 8th section, declined beam interlude (4);
The 9th section, by the Y shape pillar outside bifurcated (8) of the 6th section upper surface to the height of declined beam bottom surface;
The tenth section, declined beam epimere (5).
3, job practices according to claim 1 and 2 is characterized in that: can construct simultaneously for described the 7th section and the 9th section, the side column in the 4th section and the construction of the 3rd floor column and floor can with the 3rd section carry out simultaneously.
4, according to the described method of arbitrary claim in the claim 1 to 3, it is characterized in that: in the described scaffold joint system, the Y shape pillar bifurcated adopts common fastener type steel pipe scaffold with the declined beam support of encorbelmenting partly in interior i.e. end; The encorbelment template of declined beam view field of Y shape pillar support to adopt wrist button multifunction scaffold, and horizon bar adopts two steel pipes, two fastener to fix; Up at the bottom of beam slab hoop and longitudinal axis support are set from two-layer platform, hoop supports whenever to stride the 3-5 road is set, and up adds 2-4 road horizontal support from bifurcated, vertical support top and cant beam support rail banding, bottom and scaffold horizon bar banding; Every 2-6 strides a shearing support is set.
CN 02154109 2002-12-23 2002-12-23 Method for constructing Y shape pillar and suspended declined beam CN1215236C (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN 02154109 CN1215236C (en) 2002-12-23 2002-12-23 Method for constructing Y shape pillar and suspended declined beam

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CN1215236C CN1215236C (en) 2005-08-17

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101949191A (en) * 2010-09-06 2011-01-19 中国建筑第八工程局有限公司 Method for constructing unsupported super-long irregularly-shaped overhanging floor
CN101538896B (en) * 2009-04-03 2011-05-11 标力建设集团有限公司 Construction method for jettied structure at high attitude of high-rise building
CN102605955A (en) * 2012-04-20 2012-07-25 天津住宅集团建设工程总承包有限公司 Stand variable-section prestress overhanging type folding beam construction method
CN103015723A (en) * 2012-12-28 2013-04-03 青建集团股份公司 Secondary casting molding construction method of cast-in-situ concrete stand structure
CN104088461A (en) * 2014-07-18 2014-10-08 北京城建建设工程有限公司 Y-type cast-in-place concrete column formwork system and construction method thereof
CN104213728A (en) * 2014-08-25 2014-12-17 浙江省一建建设集团有限公司 Oblique beam for grandstand of stadium and construction process for oblique beam
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
CN104481025A (en) * 2014-11-21 2015-04-01 江苏沪宁钢机股份有限公司 Trident pillar with irregular sections
CN105178434A (en) * 2015-06-08 2015-12-23 天津住宅集团建设工程总承包有限公司 Overhanging suspended building structure and building and circular large building
CN105239725A (en) * 2015-11-17 2016-01-13 中建二局第三建筑工程有限公司 Construction method and construction template for ultrahigh oblique concrete column
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
CN106854941A (en) * 2016-12-30 2017-06-16 中国建筑第八工程局有限公司 A kind of construction method of heavy in section Stand Inclined Beams and batter post
CN107227814A (en) * 2017-06-19 2017-10-03 中国建筑第二工程局有限公司 A kind of large cantilever concrete structure section construction method
CN110512796A (en) * 2019-07-10 2019-11-29 中建钢构有限公司 A kind of Double curved arc large span steel truss and preparation method thereof

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101538896B (en) * 2009-04-03 2011-05-11 标力建设集团有限公司 Construction method for jettied structure at high attitude of high-rise building
CN101949191A (en) * 2010-09-06 2011-01-19 中国建筑第八工程局有限公司 Method for constructing unsupported super-long irregularly-shaped overhanging floor
CN102605955A (en) * 2012-04-20 2012-07-25 天津住宅集团建设工程总承包有限公司 Stand variable-section prestress overhanging type folding beam construction method
CN103015723A (en) * 2012-12-28 2013-04-03 青建集团股份公司 Secondary casting molding construction method of cast-in-situ concrete stand structure
CN104088461B (en) * 2014-07-18 2016-03-02 北京城建建设工程有限公司 Y type cast-in-situ concrete columns template system and construction method thereof
CN104088461A (en) * 2014-07-18 2014-10-08 北京城建建设工程有限公司 Y-type cast-in-place concrete column formwork system and construction method thereof
CN104213728B (en) * 2014-08-25 2017-02-01 浙江省一建建设集团有限公司 Oblique beam for grandstand of stadium and construction process for oblique beam
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
CN104213728A (en) * 2014-08-25 2014-12-17 浙江省一建建设集团有限公司 Oblique beam for grandstand of stadium and construction process for oblique beam
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
CN104481025A (en) * 2014-11-21 2015-04-01 江苏沪宁钢机股份有限公司 Trident pillar with irregular sections
CN105178434B (en) * 2015-06-08 2017-09-29 天津住宅集团建设工程总承包有限公司 One kind chooses hovering and hangs building structure, building and annular building mansion
CN105178434A (en) * 2015-06-08 2015-12-23 天津住宅集团建设工程总承包有限公司 Overhanging suspended building structure and building and circular large building
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
CN105239725A (en) * 2015-11-17 2016-01-13 中建二局第三建筑工程有限公司 Construction method and construction template for ultrahigh oblique concrete column
CN106854941A (en) * 2016-12-30 2017-06-16 中国建筑第八工程局有限公司 A kind of construction method of heavy in section Stand Inclined Beams and batter post
CN106854941B (en) * 2016-12-30 2019-05-10 中国建筑第八工程局有限公司 A kind of construction method of big section Stand Inclined Beams and batter post
CN107227814A (en) * 2017-06-19 2017-10-03 中国建筑第二工程局有限公司 A kind of large cantilever concrete structure section construction method
CN107227814B (en) * 2017-06-19 2019-05-03 中国建筑第二工程局有限公司 A kind of large cantilever concrete structure section construction method
CN110512796A (en) * 2019-07-10 2019-11-29 中建钢构有限公司 A kind of Double curved arc large span steel truss and preparation method thereof
WO2021004187A1 (en) * 2019-07-10 2021-01-14 中建科工集团有限公司 Double-curved arc-shaped large-span steel truss and manufacturing method thereof

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