CN102605955A - Stand variable-section prestress overhanging type folding beam construction method - Google Patents
Stand variable-section prestress overhanging type folding beam construction method Download PDFInfo
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- CN102605955A CN102605955A CN2012101188004A CN201210118800A CN102605955A CN 102605955 A CN102605955 A CN 102605955A CN 2012101188004 A CN2012101188004 A CN 2012101188004A CN 201210118800 A CN201210118800 A CN 201210118800A CN 102605955 A CN102605955 A CN 102605955A
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Abstract
The invention discloses a stand variable-section prestress overhanging type folding beam construction method, which comprises the following steps of: binding strut steel bars for a plurality of struts on a pre-throwing columnar bar of a lower floor slab at intervals to form left and right rows of strut steel bars; pouring concrete into a plurality of strut templates in a left row and a right row to form a left row of struts and a right row of struts; respectively supporting a bottom template of a left folding beam and a bottom template of a right folding beam on the tops of the struts; respectively mounting a common steel bar and a corrugated pipe penetrated by a prestress steel bar on the left folding beam bottom template and the right folding beam bottom template; integrally pouring concrete into the templates of the folding beams, beam templates of a plurality of beams, a template of a stand and a template of an upper floor slab; and after the strength of the concrete at the left folding beam and the right folding beam which are required to be poured meets a requirement, tensioning the prestress steel bar penetrated in the corrugated pipe. According to the method, steel materials are saved, the structural span is increased, the gravity of the structure is reduced, the usability is improved, and the vertical shearing force and the main tension stress of a concrete beam are reduced.
Description
Technical field
The present invention relates to a kind of job practices of prestressed girder, relate in particular to a kind of job practices of grandstand variable cross-section prestressing force overhanging type folding beam.
Background technology
The prestressed reinforced concrete construction member generally is to form resilient depression through the stretch-draw to presstressed reinforcing steel; The internal pressure that just receives some and be evenly distributed before being come into operation in inherence, concrete cross section is used for part or all offset the stress that forms owing to service load.It can improve the crack of structural element and the performance of distortion, and the compressive stress in this tensile stress and the concrete just in time forms a self-balancing system, makes the stressed more reasonable of concrete structure.But prestressed construction technology is relatively complicated, requires the professional very strong of prestressed structure construction.
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1 application number is that the Chinese patent of CN201010187230.5 discloses " prestressed concrete rigid frame cable beam ".It relates to a kind of rigid frame cable beam.The present invention exists because of beam body deadweight excessive (account for floor beam slab gross weight can up to 65%) and is unfavorable for that antidetonation, consumptive material are many, forms problems such as mass concrete construction, the difficult assurance of quality in order to solve existing reinforced concrete beam.It is linear that Suo Liang is bent rope folding, put the beams in place and underbeam laterally arranges, a plurality of columns be set in parallel in put the beams in place and underbeam between, Suo Liang is arranged between upper beam and the underbeam and is tangent with underbeam, Suo Liang is a prestressed member, is provided with prestressing tendon in the Suo Liang; Upper beam, underbeam, Suo Liang and a plurality of column are rigidly connected and form said rigid frame cable beam, between upper beam and underbeam, are formed with a plurality of holes that differ in size.Rigid frame cable beam of the present invention with compare with condition entity beam: beam body deadweight can alleviate 40～50%; Equipment air conditioning pipings etc. can be formed with between upper beam, underbeam and pass through in a plurality of holes that differ in size, and do not take the floor floor height in addition.
2 application numbers are that the Chinese patent of CN201010241142.9 discloses " prestressed concrete mansard rigid-frame beam ".It relates to a kind of rigit-frame beam that is used for the flooring load-bearing.The present invention is unfavorable for antidetonation in order to solve existing wide-flat beam greatly in the deadweight of highrise building central sill body; Take floor height, the problem that indoor energy consumption is increased relatively.Roll over beam down and be a plurality of straight section beams appearance profile that is formed by connecting and be the beam body of minor arc shape; Roll over down that beam is positioned at the below of upper beam and the contour shape of the two formation is bad arc; One end of a flat section beam and first node are rigidly connected and are integral, and an end of another flat section beam and Section Point are rigidly connected and are integral; The column that a plurality of height do not wait is arranged on puts the beams in place and following the folding between the beam, is putting the beams in place and is being formed with a plurality of holes that are used to pass through hydroelectric line and small size air-conditioning caliber that differ in size between the folding beam down; Under roll over and be provided with prestressing tendon in the beam.The present invention be furnished with presstressed reinforcing steel Shu Shiti beam contrast with the condition equal section: concrete material consumption and the deadweight of beam body can reduce and reach 50%, and the plain bars amount reduces and reaches 25%.
3 application numbers are that the Chinese patent of CN201020276866.2 discloses " prestressed concrete mansard rigid-frame beam ", relate to a kind of rigit-frame beam that is used for the flooring load-bearing.The utility model is unfavorable for antidetonation in order to solve existing wide-flat beam greatly in the deadweight of highrise building central sill body; Take floor height, the problem that indoor energy consumption is increased relatively.Roll over beam down and be a plurality of straight section beams appearance profile that is formed by connecting and be the beam body of minor arc shape; Roll over down that beam is positioned at the below of upper beam and the contour shape of the two formation is bad arc; One end of a flat section beam and first node are rigidly connected and are integral, and an end of another flat section beam and Section Point are rigidly connected and are integral; The column that a plurality of height do not wait is arranged on puts the beams in place and following the folding between the beam, is putting the beams in place and is being formed with a plurality of holes that are used to pass through hydroelectric line and small size air-conditioning caliber that differ in size between the folding beam down; Under roll over and be provided with prestressing tendon in the beam.The utility model be furnished with presstressed reinforcing steel Shu Shiti beam contrast with the condition equal section: concrete material consumption and the deadweight of beam body can reduce and reach 50%, and the plain bars amount reduces and reaches 25%.
Though the 1st～3 patent has a series of advantage, is applicable to the building engineering of large span, large space, and there are a plurality of columns to be set in parallel between upper beam and the underbeam, block spectators' sight line as the strong point.And the grandstand in inapplicable stadium, cinema etc.
4 application numbers are that the Chinese patent of CN201020596106.X discloses " the multidirectional steel work that crosses of grandstand "; The multidirectional steel work that crosses of a kind of grandstand; Comprise the Stand Inclined Beams, floor levels beam and the structural column that are intersected in a node each other; And said Stand Inclined Beams and floor levels beam are the steel framework girder construction, and said Stand Inclined Beams and the floor levels beam node that crosses forms firm territory.Through the put more energy into mode in firm territory of setting; Stressed the concentrating of the Vierendeel girder of all directions junction is delivered to the firm territory that the steel column end forms; Through the be delivered to structural column of firm territory with reasonable stress, this make has also avoided in post, being provided with too much stiffening rib simultaneously, with the position extension of field Welding again; The firm territory of node area can be accomplished in factory process, and quality is able to guarantee; The design of node not only makes complicated junction beam power transmission route make clear; Reached the requirement of " the weak member of strong node " again; The purpose that possesses the good resistance shock stability; This application is Stand Inclined Beams, floor levels beam and structural column, and said Stand Inclined Beams and floor levels beam are the steel framework girder construction.
5 application numbers are that 02154109.4 Chinese patent discloses the job practices of the declined beam of encorbelmenting " Y shape pillar with ", belong to building beam column job practices, especially have the job practices of the building beam column of the declined beam of encorbelmenting.The present invention has adopted segmentation to unite the method for construction; Be about to Y shape pillar and be divided into several sections with the declined beam of encorbelmenting; Every section is adjacent floor, beam, post and other the concrete structure gang while casting and constructing that connects; They are connected as one mutually, resist axial compression and horizontal thrust that the declined beam deadweight produces jointly; Support system is to adopt bowl fastening type multifunction scaffold and common fastener scaffold to cooperate the scaffold joint system of forming; The distich hand frame system that fits carries out carrying out concrete pouring again behind the bearing test.Method of the present invention has solved declined beam deadweight column and the axial compression of side column and the difficult problem of horizontal thrust, has guaranteed that being perfectly safe of construction is reliable, is applicable to the construction of the large-scale treatment of the earth with encorbelment declined beam and Y type column.This patent floor, beam, post and other concrete structure gang be casting and constructing simultaneously, is not suitable for the construction of the grandstand variable cross-section prestressing force overhanging type folding beam of stadium, cinema etc.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; Provide a kind of and practice thrift steel, increase structural span, reduce dead load, improve function of use, reduce the vertical shear and the principal tensile stress of concrete beam; A kind of grandstand variable cross-section prestressing force overhanging type folding beam construction method simple in structure, safe and reliable.
A kind of grandstand variable cross-section prestressing force overhanging type folding beam construction method of the present invention, it may further comprise the steps:
(1) on the post muscle that lower floor's floor gets rid of in advance at interval the pillar reinforcing bar of a plurality of pillars of colligation form left bank, right row's pillar reinforcing bar, the pillar reinforcing bar of first pillar that wherein is positioned at the avris of grandstand side is positioned at the transition broken line place of the template of folding beam to be installed;
(2) install column template at each pillar reinforcing bar place, concreting forms left and right row's pillar in a plurality of column templates of left and right row then;
(3) install the soffit formwork of left side folding beam and the soffit formwork of right folding beam respectively in described left bank pillar and right row's post top portion;
(4) plain bars and the bellows that is installed with prestressed reinforcement are installed respectively on described left and right folding beam bottom board plate; Described prestressed reinforcement is a prestress steel hinge bundle; Described plain bars is broken line type with the bellows that is installed with prestressed reinforcement, and described plain bars and the bellows that is installed with prestressed reinforcement connect and compose by being inclined cross the downward section of encorbelmenting, broken line, transition broken line, flat segments from the grandstand side successively;
(5) side template of left and right folding beam is installed, the beam forms of many beams is installed between the side template of described left and right folding beam at interval, on described beam forms, install the template of seeing platen with the template of seeing the upper strata floor that platen links to each other;
(6) colligation beam muscle and seeing colligation links to each other with the beam muscle in the template of platen the plate muscle of seeing platen and the plate muscle of the upper strata floor that colligation links to each other with the beam muscle in the template of upper strata floor in the beam forms of every beam;
(7) in the template of left and right folding beam, in the beam forms of many beams, see in the template of platen and integrated poured concrete in the template of upper strata floor;
(8) after the concrete of left and right folding Liang Chu to be cast reaches requirement of strength, the prestressed reinforcement that is through in the bellows is carried out stretch-draw, then corrugated conduit is in the milk and the closure grouting hole.
Adopt the inventive method to practice thrift steel, increase structural span, reduce dead load, improve function of use, reduce the vertical shear and the principal tensile stress of concrete beam, simple in structure, safe and reliable.This method is not provided with column in the downward section of encorbelmenting that is inclined cross of left and right folding beam, has avoided that the spectators under the grandstand are unsighted to be hindered; The left and right folding beam of this method is along with the grandstand shape is broken line type; Connect and compose by being inclined cross the downward section of encorbelmenting, broken line, transition broken line, flat segments successively; Thereby the beam section geomery that makes left and right folding beam change also optimum carrying out constitute an integral body the space coincide, increase structural span, reduce dead load; This method is because left and right folding beam adopts post stretching bonded prestress job practices to construct; And the steel strand of the stretch-draw in bellows and described corrugated tube trend all is the broken line type variation with prestressing force folding beam; So, improved the structural safety intensity of the left and right folding beam of the weak part section of encorbelmenting especially greatly from job practices and the linear structural strength that has guaranteed whole left and right folding beam of folding beam.
Description of drawings
Fig. 1 is the variable cross-section prestressing force overhanging type folding beam elevation of a kind of grandstand variable cross-section prestressing force overhanging type folding beam construction method of the present invention;
The beam section that Fig. 2-1,2-2,2-3,2-4 are respectively a kind of grandstand variable cross-section prestressing force overhanging type folding beam construction method of the present invention divides flat segments, transition broken line, broken line, the section of the encorbelmenting cross sectional representation that changes for four times;
Fig. 3 is the elevation of variable cross-section prestressing force overhanging type folding beam in whole building of a kind of grandstand variable cross-section prestressing force overhanging type folding beam construction method of the present invention;
Fig. 4 is the variable cross-section prestressing force overhanging type folding beam of a kind of grandstand variable cross-section prestressing force overhanging type folding beam construction method of the present invention and the 3 dimensional drawing of grandstand beam slab.
The specific embodiment
Below in conjunction with concrete embodiment, and, the present invention is done further explanation with reference to accompanying drawing:
A kind of grandstand variable cross-section prestressing force overhanging type folding beam construction method of the present invention as shown in the figure; It may further comprise the steps: (1) on the post muscle that lower floor's floor 6 gets rid of in advance at interval the pillar reinforcing bar of a plurality of pillar of colligation 4,4-1,4-2 form left bank, right row's pillar reinforcing bar, the pillar reinforcing bar of the first pillar 4-1 that wherein is positioned at the avris of grandstand side is positioned at the transition broken line place of the template of folding beam 1 to be installed; (2) install column template at each pillar reinforcing bar place, concreting forms left and right row's pillar in a plurality of column templates of left and right row then; (3) install the soffit formwork of left side folding beam and the soffit formwork of right folding beam respectively at described left bank pillar and right row's pillar 4,4-1,4-2 top; (4) plain bars and the bellows 5 that is installed with prestressed reinforcement are installed respectively on described left and right folding beam 1 soffit formwork; Described prestressed reinforcement is a prestress steel hinge bundle; Described plain bars is broken line type with the bellows 5 that is installed with prestressed reinforcement, and described plain bars and the bellows 5 that is installed with prestressed reinforcement connect and compose by being inclined cross the downward section of encorbelmenting, broken line, transition broken line, flat segments from grandstand 2 sides successively.(5) side template of left and right folding beam 1 is installed, the beam forms of many beam 3-1 is installed between the side template of described left and right folding beam at interval, on described beam forms, install the template of seeing platen 2 with the template of seeing the upper strata floor 3 that platen links to each other; (6) colligation beam muscle and seeing colligation links to each other with the beam muscle in the template of platen 2 the plate muscle of seeing platen 2 and the plate muscle of the upper strata floor 3 that colligation links to each other with the beam muscle in the template of upper strata floor 3 in the beam forms of every beam 3-1; (7) in the template of left and right folding beam 1, in the beam forms of many beam 3-1, see in the template of platen 2 and integrated poured concrete in the template of upper strata floor 3; (8) after the concrete of left and right folding Liang1Chu to be cast reaches requirement of strength, the prestressed reinforcement that is through in the bellows 5 is carried out stretch-draw, then corrugated conduit is in the milk and the closure grouting hole.D-D among Fig. 1 and 2 is that the cross-sectional structure of the section of encorbelmenting, the cross-sectional structure that C-C is broken line, cross-sectional structure, the A-A that B-B is the transition broken line are the cross-sectional structure of flat segments.
Described step (5) and (6) can be interted in construction and carried out.
Preferably in above-mentioned steps (4); At interval a plurality of reinforced mesh are installed respectively in the intersection of the left pillar at the section tail place that is positioned at flat segments and left side folding beam and in the intersection of the right pillar 4-2 at the section tail place that is positioned at flat segments and right folding beam, and in described step (6) plate muscle and the plain bars of each described reinforced mesh and beam muscle, upper strata floor 3 with the bellows that is installed with prestressed reinforcement 5 mutual colligations be in the same place.Spacing distance between per two reinforced mesh is about 100mm.This method makes the section tail place of left and right folding beam 1 flat segments pass through reinforced mesh folding beam 1, pillar 4-2, and many beam 3-1, upper strata floor 3 integral body connect into an individual system, have strengthened the structural safety intensity of folding beam greatly.
Embodiment 1
(1) on the post muscle that lower floor's floor 6 gets rid of in advance at interval the pillar reinforcing bar of a plurality of pillar of colligation 4,4-1,4-2 form left bank, right row's pillar reinforcing bar, the pillar reinforcing bar of the first pillar 4-1 that wherein is positioned at the avris of grandstand side is positioned at the transition broken line place of the template of folding beam 1 to be installed; (2) install column template at each pillar reinforcing bar place, concreting forms left and right row's pillar in a plurality of column templates of left and right row then; (3) install the soffit formwork of left side folding beam and the soffit formwork of right folding beam respectively at described left bank pillar and right row's pillar 4,4-1,4-2 top; (4) plain bars and the bellows 5 that is installed with prestressed reinforcement are installed respectively on described left and right folding beam 1 soffit formwork; Described prestressed reinforcement is a prestress steel hinge bundle; Described plain bars is broken line type with the bellows 5 that is installed with prestressed reinforcement, and described plain bars and the bellows 5 that is installed with prestressed reinforcement connect and compose by being inclined cross the downward section of encorbelmenting, broken line, transition broken line, flat segments from grandstand 2 sides successively.Left pillar 4-2 at the section tail place that is positioned at flat segments is equipped with a plurality of reinforced mesh in the interval with left intersection and the right pillar 4-2 at the section tail place that is positioned at flat segments that rolls over beam respectively with right intersection of rolling over beam, and the spacing distance between per two reinforced mesh is about 100mm.(5) side template of left and right folding beam 1 is installed, the beam forms of many beam 3-1 is installed between the side template of described left and right folding beam at interval, on described beam forms, install the template of seeing platen 2 with the template of seeing the upper strata floor 3 that platen links to each other; (6) colligation beam muscle and seeing colligation links to each other with the beam muscle in the template of platen 2 the plate muscle of seeing platen 2 and the plate muscle of the upper strata floor 3 that colligation links to each other with the beam muscle in the template of upper strata floor 3 in the beam forms of every beam 3-1; The plate muscle of each described reinforced mesh and beam muscle, upper strata floor 3 and plain bars with the bellows that is installed with prestressed reinforcement 5 mutual colligations be in the same place.(7) in the template of left and right folding beam 1, in the beam forms of many beam 3-1, see in the template of platen 2 and integrated poured concrete in the template of upper strata floor 3; (8) after the concrete of left and right folding Liang1Chu to be cast reaches requirement of strength, the prestressed reinforcement that is through in the bellows 5 is carried out stretch-draw, then corrugated conduit is in the milk and the closure grouting hole.Described step (5) and (6) are interspersed carrying out in construction.
This method is not provided with column in the downward section of encorbelmenting that is inclined cross of left and right folding beam, has avoided that the spectators under the grandstand are unsighted to be hindered; The left and right folding beam of this method is along with the grandstand shape is broken line type; Connect and compose by being inclined cross the downward section of encorbelmenting, broken line, transition broken line, flat segments successively; Thereby the beam section geomery that makes left and right folding beam change also optimum carrying out constitute an integral body the space coincide, increase structural span, reduce dead load; This method is because left and right folding beam adopts post stretching bonded prestress job practices to construct; And the steel strand of the stretch-draw in bellows and described corrugated tube trend all is the broken line type variation with prestressing force folding beam; So, improved the structural safety intensity of the left and right folding beam of the weak part section of encorbelmenting especially greatly from job practices and the linear structural strength that has guaranteed whole left and right folding beam of folding beam.Folding beam 1, pillar 4-2, many beam 3-1, upper strata floor 3 integral body connect into an individual system through reinforced mesh at the section tail place of left and right folding Liangping straight section, have strengthened the structural safety intensity of folding beam greatly.
Embodiment 2
(1) on the post muscle that lower floor's floor 6 gets rid of in advance at interval the pillar reinforcing bar of a plurality of pillar of colligation 4,4-1,4-2 form left bank, right row's pillar reinforcing bar, the pillar reinforcing bar of the first pillar 4-1 that wherein is positioned at the avris of grandstand side is positioned at the transition broken line place of the template of folding beam 1 to be installed; (2) install column template at each pillar reinforcing bar place, concreting forms left and right row's pillar in a plurality of column templates of left and right row then; (3) install the soffit formwork of left side folding beam and the soffit formwork of right folding beam respectively at described left bank pillar and right row's pillar 4,4-1,4-2 top; (4) plain bars and the bellows 5 that is installed with prestressed reinforcement are installed respectively on described left and right folding beam 1 soffit formwork; Described prestressed reinforcement is a prestress steel hinge bundle; Described plain bars is broken line type with the bellows 5 that is installed with prestressed reinforcement, and described plain bars and the bellows 5 that is installed with prestressed reinforcement connect and compose by being inclined cross the downward section of encorbelmenting, broken line, transition broken line, flat segments from grandstand 2 sides successively.(5) side template of left and right folding beam 1 is installed, the beam forms of many beam 3-1 is installed between the side template of described left and right folding beam at interval, on described beam forms, install the template of seeing platen 2 with the template of seeing the upper strata floor 3 that platen links to each other; (6) colligation beam muscle and seeing colligation links to each other with the beam muscle in the template of platen 2 the plate muscle of seeing platen 2 and the plate muscle of the upper strata floor 3 that colligation links to each other with the beam muscle in the template of upper strata floor 3 in the beam forms of every beam 3-1; (7) in the template of left and right folding beam 1, in the beam forms of many beam 3-1, see in the template of platen 2 and integrated poured concrete in the template of upper strata floor 3; (8) after the concrete of left and right folding Liang1Chu to be cast reaches requirement of strength, the prestressed reinforcement that is through in the bellows 5 is carried out stretch-draw, then corrugated conduit is in the milk and the closure grouting hole.Described step (5) and (6) are interspersed carrying out in construction.
This method is not provided with column in the downward section of encorbelmenting that is inclined cross of left and right folding beam, has avoided that the spectators under the grandstand are unsighted to be hindered; The left and right folding beam of this method is along with the grandstand shape is broken line type; Connect and compose by being inclined cross the downward section of encorbelmenting, broken line, transition broken line, flat segments successively; Thereby the beam section geomery that makes left and right folding beam change also optimum carrying out constitute an integral body the space coincide, increase structural span, reduce dead load; This method is because left and right folding beam adopts post stretching bonded prestress job practices to construct; And the steel strand of the stretch-draw in bellows and described corrugated tube trend all is the broken line type variation with prestressing force folding beam; So, improved the structural safety intensity of the left and right folding beam of the weak part section of encorbelmenting especially greatly from job practices and the linear structural strength that has guaranteed whole left and right folding beam of folding beam.
Claims (3)
1. a grandstand variable cross-section prestressing force overhanging type is rolled over beam construction method, it is characterized in that it may further comprise the steps:
(1) on the post muscle that lower floor's floor gets rid of in advance at interval the pillar reinforcing bar of a plurality of pillars of colligation form left bank, right row's pillar reinforcing bar, the pillar reinforcing bar of first pillar that wherein is positioned at the avris of grandstand side is positioned at the transition broken line place of the template of folding beam to be installed;
(2) install column template at each pillar reinforcing bar place, concreting forms left and right row's pillar in a plurality of column templates of left and right row then;
(3) install the soffit formwork of left side folding beam and the soffit formwork of right folding beam respectively in described left bank pillar and right row's post top portion;
(4) plain bars and the bellows that is installed with prestressed reinforcement are installed respectively on described left and right folding beam bottom board plate; Described prestressed reinforcement is a prestress steel hinge bundle; Described plain bars is broken line type with the bellows that is installed with prestressed reinforcement, and described plain bars and the bellows that is installed with prestressed reinforcement connect and compose by being inclined cross the downward section of encorbelmenting, broken line, transition broken line, flat segments from the grandstand side successively;
(5) side template of left and right folding beam is installed, the beam forms of many beams is installed between the side template of described left and right folding beam at interval, on described beam forms, install the template of seeing platen with the template of seeing the upper strata floor that platen links to each other;
(6) colligation beam muscle and seeing colligation links to each other with the beam muscle in the template of platen the plate muscle of seeing platen and the plate muscle of the upper strata floor that colligation links to each other with the beam muscle in the template of upper strata floor in the beam forms of every beam;
(7) in the template of left and right folding beam, in the beam forms of many beams, see in the template of platen and integrated poured concrete in the template of upper strata floor;
(8) after the concrete of left and right folding Liang Chu to be cast reaches requirement of strength, the prestressed reinforcement that is through in the bellows is carried out stretch-draw, then corrugated conduit is in the milk and the closure grouting hole.
2. grandstand variable cross-section prestressing force overhanging type folding beam construction method according to claim 1, it is characterized in that: described step (5) and (6) are interspersed carrying out in construction.
3. grandstand variable cross-section prestressing force overhanging type folding beam construction method according to claim 1 and 2; It is characterized in that: in described step (4); At interval a plurality of reinforced mesh are installed respectively in the intersection of the left pillar at the section tail place that is positioned at flat segments and left side folding beam and in the intersection of the right pillar at the section tail place that is positioned at flat segments and right folding beam, and in described step (6) plate muscle and the plain bars of each described reinforced mesh and beam muscle, upper strata floor with the bellows that is installed with prestressed reinforcement mutual colligation be in the same place.
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| CN2012101188004A CN102605955A (en) | 2012-04-20 | 2012-04-20 | Stand variable-section prestress overhanging type folding beam construction method |
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| 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 |
| 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 |
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Application publication date: 20120725 |