CN102777037A

CN102777037A - Simple and practical hoisting construction method of long-span steel girder

Info

Publication number: CN102777037A
Application number: CN2011101234633A
Authority: CN
Inventors: 孙晓阳; 颜卫东; 王小波; 黄丽娟
Original assignee: China Construction Eighth Engineering Division Co Ltd
Current assignee: China Construction Eighth Engineering Division Co Ltd
Priority date: 2011-05-13
Filing date: 2011-05-13
Publication date: 2012-11-14
Anticipated expiration: 2031-05-13
Also published as: CN102777037B

Abstract

The invention discloses a simple, practical and economic hoisting construction method of a long-span steel girder. The method comprises (1) dividing the long-span steel girder into several small sections according to construction requirements, using a tower crane or a winding engine to hoist each section of the steel girder to a close construction area, and adopting a steel tube and a crowbar to move steel girders in small sections in a matched mode on the outside of operation radius; (2) strengthening an original full frame and additionally installing a cross bar for placing a portable calabash hook position, respectively adding a slant upright bar and a small cross bar which are fixed through a fastener on two sides of cross bar provided with a portable calabash in a hanging mode, and fixing the bottom of the upright bar and the cross bar on the lower portion through the fastener; (3) lifting the steel girder in the small sections to a scheduled elevation through the portable calabash, enabling the end portion or an embedded part of a girder to be connected through a high-strength bolt, and additionally installing a cross bar on the bottom at the other end for bearing the girder; (4) adopting a spirit level to recheck the elevation on the two sides, adjusting a support position of the cross bar; and (5) adopting the same method to hoist and complete the steel girders in other sections in the span to complete assembly.

Description

A kind of simple and practical large-span steel girder construction method for hanging

Affiliated technical field

The invention belongs to technical field of buildings, be specifically related to the form of construction work of steel work crossbeam lifting.

Background technology

At present; Along with China's rapid development of economy; Improving constantly of people's living standard, for satisfying the growing material and cultural needs of people, public building usually adopts the gimmick of large-span space structure; Realize the requirement of function of use, the factory building crane girder of the conference room of public building, cinema, Zhongting, exhibition hall and industrial construction etc. has mostly adopted the steel beam structure of large span.For this steel beam structure; Mostly adopt behind the installation on ground again with the large tonnage crane integral hoisting or utilize that mechanical loose mail such as tower crane, mobile crane, hoist engine lifts, the job practices of installation at high altitude; These job practicess; Strong to space site requirements height and construction machinery dependence, beyond the machinery rotation radius, then can't implement, and cost is high.

Summary of the invention

To the deficiency that the place space requirement is high, the construction machinery dependence is strong, cost is high, the present invention provides a kind of simple and easy practical economic large-span steel girder construction method for hanging to existing hanging method.

Below introduce a kind of simple and easy practical economic large-span steel girder construction method for hanging of the present invention in detail, accomplish as follows:

1) large-span steel girder is divided into several segments,, utilizes tower crane that every segment girder steel is lifted to the flooring zone of constructing earlier in the overlayable zone of tower crane; 2), encryption needs the template framed bent in lifting zone, and sets up the cross bar of laying portable cucurbit hook position; 3) can not adopt steel pipe and crowbar to cooperate mobile segment girder steel in the scope of overwrite job at tower crane; When the segment girder steel moves to after the preset range end that the end of portable cucurbit is buckled in little girder steel, the other end is buckled on the template framed bent in girder steel the place ahead on the little cross bar, and 4) for convenient little girder steel moves horizontally, the steel pipe that supports the segment girder steel is vertical with little girder steel without exception; When the segment girder steel is pulled in the template framed bent behind the relevant position by portable cucurbit, carry out the vertical of segment girder steel and move; 5) the vertical of girder steel moves, and selects for use two portable cucurbits to be buckled in the back of little girder steel, and the other end of portable cucurbit is buckled on the little cross bar on girder steel top.For guaranteeing the stability of the little cross bar of moving process, little cross bar is reinforced, the both sides that on little cross bar, hang portable cucurbit respectively increase an oblique vertical rod with little cross bar is fixed with fastener, and vertical rod bottom and lower crosspiece are fixed with fastener, form stable three-legged structure; Guarantee girder steel lifting process safety; 6) after portable cucurbit rises to the segment girder steel predetermined absolute altitude, the end adopts high-strength bolt to be connected with the built-in fitting of structural column or beam, and other end bottom adds cross bar, carries girder steel, and cross bar adopts fastener to be connected with the both sides vertical rod, and the insurance fastener is set up in the bottom; After adopting levelling tube to check the both sides absolute altitude, the Support Position of adjustment cross bar.7) adopt with other sections girder steel in the quadrat method lifting completion span, accomplish assembly unit, in the assembly unit process, adopt levelling tube to check outside the whole section level absolute altitude, the horizontal range that also should adopt tape measure to check girder steel between each span meets design requirement.8) after girder steel is accomplished and installed, remove the lifting of carrying cross bar and portable cucurbit and use support body.

Advantage of the present invention is: adopting this method to carry out the large-span steel girder construction, all is artificial and simple portable cucurbit operation, under the conditions permit situation; Also can adopt the tower crane less important work; Simple, convenient, economical, reduce dependence to large tonnage crane and tower crane, reduce requirement to the space, place; Required framed bent is only done suitable adjustment and is got final product on original template supporting row frame basis, greatly reduce construction cost.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further specified

Fig. 1 is a steel lifting component drawing

Fig. 2 is that girder steel moves horizontally sketch map

Fig. 3 is that lifting girder steel level is with regard to bitmap

Fig. 4 is that a former full hall frame is set up lifting and used the support body sketch map

Fig. 5 is that girder steel vertically moves sketch map

Fig. 6 is that girder steel vertically moves elevation

Fig. 7 is the vertical mobile profile figure of girder steel

Fig. 8 is reinforcing figure at the bottom of the girder steel back rest in place

1. tower cranes among the figure, 2. suspension hook, 3. girder steel, 4. Chain block, 5. steel pipe, 6. girder steel back tie point, 7. reinforcing steel pipe

In Fig. 1, tower crane 1 utilizes 2 pairs of girder steels of suspension hook 3 to carry out upper air installing

In Fig. 2, girder steel 3 pads utilize manpower pulling Chain block 4, thereby girder steel 3 are moved horizontally on steel pipe 5

In Fig. 4, the both sides that on little cross bar, hang portable cucurbit respectively increase an oblique vertical rod with little cross bar is fixed with fastener, and vertical rod bottom and lower crosspiece are fixed with fastener, form stable three-legged structure

In Fig. 5, Chain block 4 is buckled on two tie points in back of girder steel 3, utilize manpower pulling Chain block 4, thereby girder steel 3 is vertically moved

In Fig. 7, after utilizing Chain block 4 girder steel 3 to be promoted to predetermined absolute altitude, adopt reinforcing steel pipe 7 to reinforce in the bottom of girder steel 3.

Claims

1. simple and practical large-span steel girder construction method for hanging is characterized in that accomplishing as follows:

1) according to construction requirement large-span steel girder is divided into several segments, utilizes tower crane or hoist engine that every section girder steel is lifted to closing on construction area, operating radius then adopts steel pipe and crowbar to cooperate outward and moves the segment girder steel;

2) add Guyuan full hall frame and set up the cross bar of laying portable cucurbit hook position, the both sides that on cross bar, hang portable cucurbit respectively increase an oblique vertical rod with little cross bar is fixed with fastener, and vertical rod bottom and lower crosspiece are fixed with fastener;

3) with portable cucurbit the segment girder steel is risen to predetermined absolute altitude, the end adopts high-strength bolt to be connected with the built-in fitting of structural column or beam, and other end bottom adds cross bar, and cross bar adopts fastener to be connected with the both sides vertical rod, divides into two fasteners, carries girder steel;

4) after the employing levelling tube is checked the both sides absolute altitude, the Support Position of adjustment cross bar; Use with the quadrat method lifting and accomplish other sections girder steel in the span, accomplish assembly unit.

5) adopt with other span girder steels of quadrat method lifting completion, and accomplish assembly unit, girder steel adopts invar tape to check the horizontal range of girder steel between each span, makes to adhere to specification.

6) after the girder steel assembly unit is accomplished, remove lifting, set up template die, concreting with auxiliary cross bar and vertical rod.