CN105257005A - Method for segmenting steel-structured transfer truss and segmented steel-structured transfer truss - Google Patents
Method for segmenting steel-structured transfer truss and segmented steel-structured transfer truss Download PDFInfo
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- CN105257005A CN105257005A CN201510740851.4A CN201510740851A CN105257005A CN 105257005 A CN105257005 A CN 105257005A CN 201510740851 A CN201510740851 A CN 201510740851A CN 105257005 A CN105257005 A CN 105257005A
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Abstract
The invention relates to the field of building construction, in particular to the field of steel-structure installation construction in super high-rise civil buildings. A method for segmenting a steel-structured transfer truss comprises the following steps of (1) segmenting and determining the truss; (2) calculating the length difference between a corbel top chord and a corbel bottom chord, wherein the length difference between the corbel top chord and the corbel bottom chord is determined according to the installation position of a lifter and the type selection of the lifter; (3) determining the length difference between a truss top chord segment and a truss bottom chord segment, wherein a truss bottom chord is longer than a truss top chord, and the length difference between the truss bottom chord and the truss top chord is identical to that between the corbel top chord and the corbel bottom chord. The segmented steel-structured transfer truss comprises the corbel top chord, the corbel bottom chord, the truss top chord segment, the truss bottom chord segment and a plurality of connecting segments, wherein the length of the corbel top chord is greater than that of the corbel bottom chord; the length of the truss top chord segment is smaller than that of the truss bottom chord segment. The method for segmenting the steel-structured transfer truss and the segmented steel-structured transfer truss have the advantages that the smooth lifting of the truss is guaranteed, the installation efficiency of the truss is improved, and the construction period and safety quality are ensured.
Description
Technical field
The present invention relates to the realm of building construction, be specifically related to the installation field of steel work in Super High civilian construction.
Background technology
In prior art, the Steel Structure Transfer Truss of large span is adopted to the technology of segmental hoisting, aerial splicing, there is operation and intert long in time limit, that operation easier is large problem in this technology, and high-altitude application security risk coefficient is high, cost has high input.Superaltitude, large-tonnage, large-span steel transfer truss integral hoisting construction are feeling free to try first of residential construction area, wherein trussmember size mostly is BOX1000 × 950 × 80 × 80, span is large, tonnage greatly, highly high, in traditional lifting scheme, the upper and lower chord member of pre-buried bracket and the upper and lower string of supporting truss adopt isometric design, adopt the program to carry out Integral lifting to Steel Structure Transfer Truss and there is the problem that lifter installation is difficult, operation easier is large, security risk coefficient is high, safe mass cannot ensure.
Summary of the invention
In order to solve prior art Problems existing in Steel Structure Transfer Truss promotes, the invention solves a Steel Structure Transfer Truss Integral lifting difficult problem, the method of lower edge is greater than by adopting bracket to wind up, ensure that the smooth lifting of truss, improve the installation effectiveness of truss, ensure that duration and safe mass.
For achieving the above object, the technical solution used in the present invention is: the segmentation method proposing a kind of Steel Structure Transfer Truss, comprises the following steps:
(1) truss sections: according to the requirement of construction technology and construction equipment, segmentation is carried out to truss, be divided into high-altitude embedded section and installation on ground section, its high and medium embedded section is two sections of symmetrical bracket lower edges that bracket winds up and two sections symmetrical, and bracket winds up and is longer than bracket lower edge; Installation on ground section is that two sections of symmetrical truss wind up segmentation, two sections of symmetrical truss lower edge segmentations, two sections of symmetrical eliminate stress segmentation and some linkage sections, and wherein, truss segmentation of winding up is shorter than the segmentation of truss lower edge; Wind up segmentation and bracket of truss winds up and splices, and the segmentation of truss lower edge and bracket lower edge splice, and wind up segmentation, the segmentation of truss lower edge, bracket of the connection segment truss that eliminates stress winds up and bracket lower edge; Wind up segmentation, truss lower edge sectionally smooth join of linkage section and truss forms single truss structure;
(2) determine that bracket winds up and the length difference of bracket lower edge:
A () calculates according to truss overall weight G and bracket quantity N can boist truss each bracket external force F1=G/N that need bear smoothly;
When () is for guaranteeing that truss promotes b, bracket is winded up and do not produce the one-sided stressed truss centre-of gravity shift caused, on bracket winds up, lifting platform is set, lifting platform respectively arranges a lifter in bracket both sides, namely each bracket installs 2 table lifters, calculate the tensile force f 2=F1/2 that every table lifter bears;
The external force that c lifter that () calculates according to (a) and (b) step bears selects suitable lifter, determines the diameter D of lifter;
D () determines the lifting platform size designed according to lifter diameter parameters, lifting platform size is greater than lifter diameter D, reserves certain operating space to the fixing operation of lifter;
E the installation site of () lifting platform and bracket should, according to definite calculating, find most home in lifting process to arrange platform;
F () calculates bracket and winds up and lower edge length difference L:L=D+2a+b, wherein, D is lifter diameter, and a is that lifting platform is one-sided with lifter Edge Distance, and b is that lifting platform and bracket wind up Edge Distance;
(3) determine that truss winds up the length difference of segmentation and the segmentation of truss lower edge: the segmentation of truss lower edge is longer than truss and is winded up segmentation, the wind up length difference of segmentation of the segmentation of truss lower edge and truss winds up equal with the length difference of lower edge with bracket.
Adopt the segmented Steel Structure Transfer Truss of the segmentation method of Steel Structure Transfer Truss according to claim 1, be made up of high-altitude embedded section and installation on ground section, its high and medium embedded section is two sections of symmetrical bracket lower edges that bracket winds up and two sections symmetrical; Installation on ground section is that two sections of symmetrical truss wind up segmentation, two sections of symmetrical truss lower edge segmentations and some linkage sections, the length that described bracket winds up is greater than the length of bracket lower edge, the wind up length of segmentation of truss is less than the length of truss lower edge segmentation, the wind up segmentation of winding up with truss of described bracket is connected, and described bracket lower edge and the segmentation of truss lower edge are connected.
Wind up segmentation, the segmentation of truss lower edge, bracket of described truss is winded up and is connected by the linkage section of cross forked type between bracket lower edge.
The present invention is shorter than the method for truss lower edge segmentation by adopting bracket to wind up to be longer than the segmentation of winding up of bracket lower edge and truss, meet the installing space of lifter, for steel work Integral lifting provides enough operating spaces, solve the fitting operation main points of steel work in Super High civilian construction concrete structure first, the method breaches Traditional Thinking, guarantee that truss promotes smoothly, overcome superaltitude, large-tonnage, when large-span steel transfer truss is installed, operation interts the construction delay caused, fitting operation difficulty is large, the problems such as security risk coefficient is high, installation quality and the safety of Steel Structure Transfer Truss are ensured, improve the installation effectiveness of truss, as First National announce more ripe, there is the Installation Technique of Steel Structure method of larger innovation dissemination, the method is this type of large span of later stage, large-tonnage, the installation of superaltitude Steel Structure Transfer Truss provides a kind of section construction method using for reference mature and reliable.
Adopt the segmented Steel Structure Transfer Truss of the method, the bracket of the pre-buried end in high-altitude winds up and is longer than lower edge, the segmentation of winding up of the truss of installation on ground end is shorter than the segmentation of truss lower edge, the two supports the use the installation question solving truss integral lifting device, its installation on ground section can assemble rear Integral lifting and with the once assembled installation completing single truss structure of high-altitude embedded section, compared with prior art, be conducive to the reduction of erection time, reduce operation easier, improve the installation effectiveness of Steel Structure Transfer Truss.
Accompanying drawing explanation
Fig. 1 is the structural representation of segmented Steel Structure Transfer Truss of the present invention;
Fig. 2 is the installation site schematic diagram of lifter;
Fig. 3 is the installation site schematic diagram of lifter on bracket winds up.
In figure, 1-bracket winds up, 2-bracket lower edge, and 3-eliminates stress segmentation, and 4-truss winds up segmentation, the segmentation of 5-truss lower edge, 6-lifter, 7-lifting platform.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail:
Owing to adopting the method for installation on ground Integral lifting to carry out truss installa-tion, therefore need to carry out overall segmentation to truss.Consider tower crane lifting performance and crawler crane lifting performance, according to truss structure on two sides Form Characteristic, carry out segmentation to truss is whole.Concrete segmentation comprises the following steps:
(1) truss sections: the requirement according to construction technology and construction equipment carries out segmentation to truss, as shown in Figure 1, be divided into high-altitude embedded section and installation on ground section, its high and medium embedded section is that two sections of symmetrical brackets wind up 1 and two sections of symmetrical bracket lower edges 2, and bracket winds up and 1 is longer than bracket lower edge 2; Installation on ground section is that two sections of symmetrical truss wind up symmetrical eliminate stress segmentation 3 and the some linkage sections of the symmetrical truss lower edge segmentation 5, two sections of segmentation 4, two sections, and wherein, truss segmentation 4 of winding up is shorter than truss lower edge segmentation 5; Wind up segmentation 4 and bracket of truss winds up 1 splicing, and truss lower edge segmentation 5 and bracket lower edge 2 splice, and wind up segmentation 4, truss lower edge segmentation 5, bracket of segmentation 3 truss frame for connecting that eliminates stress winds up 1 and bracket lower edge 2; Wind up segmentation, truss lower edge sectionally smooth join of linkage section and truss forms single truss structure;
(2) determine that bracket winds up the length difference of 1 and bracket lower edge 2:
A () calculates according to truss overall weight G and bracket quantity N can boist truss each bracket external force F1=G/N that need bear smoothly;
When () is for guaranteeing that truss promotes b, bracket is winded up and do not produce the one-sided stressed truss centre-of gravity shift caused, lifting platform 7 is set on bracket winds up, as shown in Figure 2,3 lifting platform 7 respectively arranges a lifter 6 in bracket both sides, namely each bracket is installed 2 table lifters 6, calculate the tensile force f 2=F1/2 that every table lifter 6 bears;
The external force that c lifter that () calculates according to (a) and (b) step bears selects suitable lifter, determines the diameter D of lifter;
D () determines the lifting platform size designed according to lifter diameter parameters, lifting platform size is greater than lifter diameter D, reserves certain operating space to the fixing operation of lifter;
E the installation site of () lifting platform and bracket should, according to definite calculating, find most home in lifting process to arrange platform;
F () calculates bracket and winds up and lower edge length difference L:L=D+2a+b, wherein, D is lifter diameter, and a is that lifting platform is one-sided with lifter Edge Distance, and b is that lifting platform and bracket wind up Edge Distance;
(3) determine that truss winds up the length difference of segmentation and the segmentation of truss lower edge: the segmentation of truss lower edge is longer than truss and is winded up segmentation, the wind up length difference of segmentation of the segmentation of truss lower edge and truss winds up equal with the length difference of lower edge with bracket.
Adopt the segmented Steel Structure Transfer Truss of above-mentioned segmentation method, comprise high-altitude embedded section and installation on ground section, its high and medium embedded section is that two sections of symmetrical brackets wind up 1 and two sections of symmetrical bracket lower edges 2; Installation on ground section is that two sections of symmetrical truss wind up the symmetrical truss lower edge segmentation 5 of segmentation 4, two sections and some linkage sections, and wherein the truss segmentation 3 that eliminates stress that segmentation 4, truss lower edge segmentation 5, bracket wind up by cross forked type between 1 and bracket lower edge 2 of winding up connects.Bracket wind up 1 length be greater than the length of bracket lower edge 2, the wind up length of segmentation 4 of truss is less than the length of truss lower edge segmentation 5.Bracket winds up and 1 to be connected with truss segmentation 4 of winding up, bracket lower edge 2 and truss lower edge segmentation 5 are connected, two sections of truss wind up between segmentation 4, between two sections of truss lower edges segmentation 5 and truss wind up between segmentation 4 with truss lower edge segmentation 5 and be all connected by linkage section.
Claims (4)
1. the segmentation method of Steel Structure Transfer Truss, is characterized in that: comprise the following steps:
(1) truss sections: according to the requirement of construction technology and construction equipment, segmentation is carried out to truss, be divided into high-altitude embedded section and installation on ground section, its high and medium embedded section is two sections of symmetrical bracket lower edges that bracket winds up and two sections symmetrical, and bracket winds up and is longer than bracket lower edge; Installation on ground section is that two sections of symmetrical truss wind up segmentation, two sections of symmetrical truss lower edge segmentations, two sections of symmetrical eliminate stress segmentation and some linkage sections, and wherein, truss segmentation of winding up is shorter than the segmentation of truss lower edge; Wind up segmentation and bracket of truss winds up and splices, and the segmentation of truss lower edge and bracket lower edge splice, and wind up segmentation, the segmentation of truss lower edge, bracket of the connection segment truss that eliminates stress winds up and bracket lower edge; Wind up segmentation, truss lower edge sectionally smooth join of linkage section and truss forms single truss structure;
(2) calculate bracket to wind up and the length difference of bracket lower edge: bracket winds up and bracket lower edge length difference is selected to determine according to the model of the installation site of lifter and lifter, ensures that lifting means normally works;
(3) determine that truss winds up the length difference of segmentation and the segmentation of truss lower edge: the segmentation of truss lower edge is longer than truss and is winded up segmentation, the wind up length difference of segmentation of the segmentation of truss lower edge and truss winds up equal with the length difference of lower edge with bracket.
2. the segmentation method of Steel Structure Transfer Truss according to claim 1, is characterized in that: determine in step (2) that bracket winds up as follows with the method for bracket lower edge length difference:
A () calculates according to truss overall weight G and bracket quantity N can boist truss each bracket external force F1=G/N that need bear smoothly;
When () is for guaranteeing that truss promotes b, bracket is winded up and do not produce the one-sided stressed truss centre-of gravity shift caused, on bracket winds up, lifting platform is set, lifting platform respectively arranges a lifter in bracket both sides, namely each bracket installs 2 table lifters, calculate the tensile force f 2=F1/2 that every table lifter bears;
The external force that c lifter that () calculates according to (a) and (b) step bears selects suitable lifter, determines the diameter D of lifter;
D () determines the lifting platform size designed according to lifter diameter parameters, lifting platform size is greater than lifter diameter D, reserves certain operating space to the fixing operation of lifter;
E the installation site of () lifting platform and bracket should, according to definite calculating, find most home in lifting process to arrange platform;
F () calculates bracket and winds up and lower edge length difference L:L=D+2a+b, wherein, D is lifter diameter, and a is that lifting platform is one-sided with lifter Edge Distance, and b is that lifting platform and bracket wind up Edge Distance.
3. adopt the segmented Steel Structure Transfer Truss of the segmentation method of the Steel Structure Transfer Truss described in claim 1 or 2, be made up of high-altitude embedded section and installation on ground section, its high and medium embedded section is two sections of symmetrical bracket lower edges that bracket winds up and two sections symmetrical; Installation on ground section is that two sections of symmetrical truss wind up segmentation, two sections of symmetrical truss lower edge segmentations and some linkage sections, it is characterized in that: the length that described bracket winds up is greater than the length of bracket lower edge, the wind up length of segmentation of truss is less than the length of truss lower edge segmentation, the wind up segmentation of winding up with truss of described bracket is connected, and described bracket lower edge and the segmentation of truss lower edge are connected.
4. segmented Steel Structure Transfer Truss according to claim 3, is characterized in that: wind up segmentation, the segmentation of truss lower edge, bracket of described truss is winded up and connected by the linkage section of cross forked type between bracket lower edge.
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Cited By (2)
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| CN109881896A (en) * | 2019-02-21 | 2019-06-14 | 深圳市建筑设计研究总院有限公司 | A kind of connector method for improving of super high-rise building |
| CN112227715A (en) * | 2020-10-21 | 2021-01-15 | 贵州建工集团第一建筑工程有限责任公司 | Construction method of section steel concrete conversion truss shear wall |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112227715A (en) * | 2020-10-21 | 2021-01-15 | 贵州建工集团第一建筑工程有限责任公司 | Construction method of section steel concrete conversion truss shear wall |
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