CN101575875B - Construction method of cantilever steel girder - Google Patents

Construction method of cantilever steel girder Download PDF

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Publication number
CN101575875B
CN101575875B CN2009100691969A CN200910069196A CN101575875B CN 101575875 B CN101575875 B CN 101575875B CN 2009100691969 A CN2009100691969 A CN 2009100691969A CN 200910069196 A CN200910069196 A CN 200910069196A CN 101575875 B CN101575875 B CN 101575875B
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China
Prior art keywords
embedded
cantilever steel
embedded bolt
floor
steel girder
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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CN2009100691969A
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Chinese (zh)
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CN101575875A (en
Inventor
李克江
张旭洪
吴永伟
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Zhongtian Construction Group Co Ltd Tianjin Branch
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Zhongtian Construction Group Co Ltd Tianjin Branch
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Priority to CN2009100691969A priority Critical patent/CN101575875B/en
Publication of CN101575875A publication Critical patent/CN101575875A/en
Application granted granted Critical
Publication of CN101575875B publication Critical patent/CN101575875B/en
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Abstract

The invention discloses a construction method of a cantilever steel girder, which comprises the following steps: the location of the pre-embedded pressure connecting stand used for arranging the cantilever steel girders is determined, the pre-embedded pressure connecting stand comprises pre-embedded bolts arranged in a paired way in the vertical cantilever direction of steel girders, the lower endof the pre-embedded bolts is fixedly connected with pre-embedded iron which is vertical to the center line, and the upper surface of the pre-embedded iron is provided with a film isolating layer; a P VC sleeve with pre-embedded bolts is sleeved; the pre-embedded iron is arranged under the concrete reinforcing bars of floor slabs, and is fixed with the lower mother plate of floor slabs; the reinforcing bars of floor slabs are paved and bonded, at least two reinforcing bars of floor slabs pass through the space between the paired pre-embedded bolts, two additive reinforcing bars are arranged in the cantilever direction of the vertical cantilever steel girders on the film isolating layer, the lengths of the two reinforcing bars are not less than 2m; the cantilever steel girders are arranged between the paired pre-embedded bolts, iron weights are arranged on the cantilever steel girders and sleeved on the paired pre-embedded bolts, and the cantilever steel girders are tightly pressed by screw nuts of the lock-in pre-embedded bolts. The pre-embedded pressure connecting stand is precisely located and can be repeated utilized, with low cost.

Description

The job practices of cantilever steel girder
Technical field
The present invention relates to a kind of method that is used for building engineering construction, particularly a kind of job practices of cantilever steel girder.
Background technology
At present; cantilever steel girder has obtained using widely in construction work; during the building engineering construction cantilever steel girder; the pre-embedded bolt that the built-in fitting that adopts is provided with in pairs for the direction of encorbelmenting along vertical girder steel; many pre-embedded bolt is generally adopted direct burial; in the process that floor is built, through regular meeting the bolt off normal appears.And there is the excessive problem of the inaccurate and disposable input of burial place in the not reproducible utilization of bolt.
Summary of the invention
The present invention provides a kind of job practices of cantilever steel girder for solving the technical problem that exists in the known technology, and this job practices pre-embedded bolt accurate positioning is reusable.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: a kind of job practices of cantilever steel girder, may further comprise the steps: (one) the lower bolster of floor install finish after, before the floor bar colligation, be identified for installing the position of the pre-buried crimping frame of cantilever steel girder, the described pre-buried crimping frame that is used to install cantilever steel girder, comprise along the vertical girder steel pre-embedded bolt that direction is provided with in pairs of encorbelmenting, the lower end of described pre-embedded bolt is connected with the embedded iron vertical with its center line, and the upper surface of described embedded iron is provided with the film separation layer; Be set with the PVC sleeve pipe on the described pre-embedded bolt; Embedded iron is arranged on below the floor bar, fixes with the lower bolster of floor; (2) floor bar is by design pitch laying, colligation, have at least two floor bars to pass between the paired pre-embedded bolt, the direction of encorbelmenting along vertical cantilever steel girder is provided with two additional bars below the floor bar on the film separation layer, and the length of described additional bar is more than or equal to 2m; (3) cantilever steel girder is seated between the paired pre-embedded bolt, puts foundary weight above, foundary weight is sleeved on the paired pre-embedded bolt, by the nut on the locking pre-embedded bolt cantilever steel girder is compressed.
Described pre-embedded bolt is provided with two rows at least along the direction of encorbelmenting of girder steel, has at least two floor bars to pass between described two row's pre-embedded bolts.
Described pre-embedded bolt and embedded iron are provided with corrosion-inhibiting coating.
Advantage and good effect that the present invention has are: embedded iron and bolt are an integral body, by fixing embedded iron bolt are accurately located, and have improved the flexural strength of cantilever steel girder; By at suit PVC sleeve pipe on the bolt with the film separation layer is set on embedded iron, after cantilever steel girder is removed, this pre-buried crimping frame can be removed recycling once more, avoided that all pre-embedded bolts are the disposable big shortcoming of loss of burying underground in the conventional way, fundamentally solved the inaccurate and excessive problem of once injecting capital into of burial place, expense is cheap, can produce tangible economic benefit and social benefit.
Description of drawings
Fig. 1 is the pre-buried crimping shelf structure schematic diagram that is used to install cantilever steel girder among the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 uses structural representation of the present invention.
Among the figure: 1, pre-embedded bolt, 2, the PVC sleeve pipe, 3, the film separation layer, 4, embedded iron, 5, floor, 6, cantilever steel girder, 7, foundary weight, 8, nut.
The specific embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1~Fig. 3, the job practices of a kind of cantilever steel girder of the present invention may further comprise the steps:
(1) the lower bolster of floor 5 install finish after, before the floor bar colligation, be identified for installing the position of the pre-buried crimping frame of cantilever steel girder, the described pre-buried crimping frame that is used to install cantilever steel girder, comprise along the vertical girder steel pre-embedded bolt 1 that direction is provided with in pairs of encorbelmenting, the lower end of described pre-embedded bolt 1 is connected with the embedded iron vertical with its center line 4, and the upper surface of described embedded iron is provided with film separation layer 3; Be set with PVC sleeve pipe 2 on the described pre-embedded bolt 1; Embedded iron 4 is arranged on below the floor bar, directly and the lower bolster of floor fix;
(2) floor bar is by design pitch laying, colligation, have at least two floor bars to pass between the paired pre-embedded bolt 1, and on film separation layer 3 below the floor bar direction of encorbelmenting along vertical cantilever steel girder 6 two additional bars are set, the length of described additional bar is more than or equal to 2m;
(3) cantilever steel girder 6 is seated between the paired pre-embedded bolt 1, puts foundary weight 7 above, foundary weight 7 is sleeved on the paired pre-embedded bolt 1, by the nut 8 on the locking pre-embedded bolt cantilever steel girder 6 is compressed.
In order to prolong the application life of this pre-buried crimping frame, described pre-embedded bolt 1 and embedded iron 4 are provided with corrosion-inhibiting coating.In order to improve the flexural strength of cantilever steel girder, described pre-embedded bolt 1 can be provided with many rows along the direction of encorbelmenting of girder steel.Be set to two rows generally speaking.Under the little situation of bearing capacity, also can adopt single row configuration.At pre-embedded bolt 1 is under at least two rows' the situation, has at least two floor bars to pass between two row's pre-embedded bolts.Film separation layer 3 can adopt plastic sheeting, malthoid barrier film, PVC barrier film, diaphragm of rubber etc.
In the present embodiment:
(1) make this pre-buried frame steel work part that connects:
Embedded iron 4 adopts 300 * 300 * 15 steel plates, 4 pre-embedded bolts of weldering on every block plate, and pre-embedded bolt diameter 18mm, the welding front spring is offered the hole of diameter 20mm in advance at bolt position, and bolt is worn two sides penetration welding behind the steel plate.
(2) installation process of pre-buried crimping frame:
The lower bolster of floor 5 install finish after, before the floor bar colligation, the unified position of determining embedded iron 4 of measuring, embedded iron 4 is arranged on below the floor bar, lower bolster direct and floor is fixed, and before floor bar is laid on the upper surface in embedded iron, i.e. film laying separation layer 3 on embedded iron and the concrete contact surface, suit PVC sleeve pipe 2 on the pre-embedded bolt 4.
Floor bar is by design pitch laying, colligation, two line up and have at least two floor bars to pass between the right pre-embedded bolt, have at least two floor bars to pass between the paired pre-embedded bolt, and on the film separation layer below the floor bar along the encorbelment reinforcing bar of additional two the Φ 14mm of direction of vertical girder steel, the length of additional bar is not less than 2m.Flexural strength with further raising cantilever steel girder.
(3) cantilever steel girder 6 is seated between the paired pre-embedded bolt, puts foundary weight 7 above, foundary weight 7 is sleeved on the paired pre-embedded bolt 1, by the nut 8 on the locking pre-embedded bolt 1 cantilever steel girder 6 is compressed.
Although in conjunction with 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 a lot of forms, these all belong within protection scope of the present invention.

Claims (3)

1. the job practices of a cantilever steel girder is characterized in that, may further comprise the steps:
(1) the lower bolster of floor install finish after, before the floor bar colligation, be identified for installing the position of the pre-buried crimping frame of cantilever steel girder, the described pre-buried crimping frame that is used to install cantilever steel girder, comprise along the vertical girder steel pre-embedded bolt that direction is provided with in pairs of encorbelmenting, the lower end of described pre-embedded bolt is connected with the embedded iron vertical with its center line, and the upper surface of described embedded iron is provided with the film separation layer; Be set with the PVC sleeve pipe on the described pre-embedded bolt; Embedded iron is arranged on below the floor bar, fixes with the lower bolster of floor;
(2) floor bar is by design pitch laying, colligation, have at least two floor bars to pass between the paired pre-embedded bolt, the direction of encorbelmenting along vertical cantilever steel girder is provided with two additional bars below the floor bar on the film separation layer, and the length of described additional bar is more than or equal to 2m;
(3) cantilever steel girder is seated between the paired pre-embedded bolt, puts foundary weight above, foundary weight is sleeved on the paired pre-embedded bolt, by the nut on the locking pre-embedded bolt cantilever steel girder is compressed.
2. the job practices of cantilever steel girder according to claim 1 is characterized in that, described pre-embedded bolt is provided with two rows at least along the direction of encorbelmenting of girder steel, has at least two floor bars to pass between the described pre-embedded bolt of two rows.
3. the job practices of cantilever steel girder according to claim 1 is characterized in that, described pre-embedded bolt and embedded iron are provided with corrosion-inhibiting coating.
CN2009100691969A 2009-06-09 2009-06-09 Construction method of cantilever steel girder Expired - Fee Related CN101575875B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009100691969A CN101575875B (en) 2009-06-09 2009-06-09 Construction method of cantilever steel girder

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Application Number Priority Date Filing Date Title
CN2009100691969A CN101575875B (en) 2009-06-09 2009-06-09 Construction method of cantilever steel girder

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CN101575875A CN101575875A (en) 2009-11-11
CN101575875B true CN101575875B (en) 2010-11-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101787741A (en) * 2010-03-18 2010-07-28 中冶实久建设有限公司 Method for mounting steel structure heavy embedded part of square billet bale turntable wall

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102650149A (en) * 2012-05-04 2012-08-29 中天建设集团有限公司 I steel reinforcement and hoop fixing structure
CN106639290A (en) * 2017-03-13 2017-05-10 中国十七冶集团有限公司 Construction method for reinforcing cantilever scaffold through recyclable embedded bolts
CN109488010A (en) * 2018-09-03 2019-03-19 中建三局集团有限公司 A kind of section steel beam clip system and its construction method being used in turn
CN113073678A (en) * 2021-04-20 2021-07-06 中国建筑一局(集团)有限公司 Construction method for embedded bolt sleeve of upper structure of turbine generator base

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101787741A (en) * 2010-03-18 2010-07-28 中冶实久建设有限公司 Method for mounting steel structure heavy embedded part of square billet bale turntable wall
CN101787741B (en) * 2010-03-18 2011-09-07 中国十九冶集团有限公司 Method for mounting steel structure heavy embedded part of square billet bale turntable wall

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