CN102777037B

CN102777037B - Simple and practical hoisting construction method of long-span steel girder

Info

Publication number: CN102777037B
Application number: CN201110123463.3A
Authority: CN
Inventors: 孙晓阳; 颜卫东; 冯跃辉; 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: 2014-11-26
Anticipated expiration: 2031-05-13
Also published as: CN102777037A

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 meeting the growing material and cultural needs of people, public building usually adopts the gimmick of large-span space structure, realize the requirement of using function, the Crane Beam 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 after installation on ground again with large tonnage crane integral hoisting or utilize that the mechanical loose mail such as tower crane, mobile crane, hoist engine lifts, the construction method of installation at high altitude, these construction methods, high and construction machinery dependence is strong to space site requirements, beyond machinery rotation radius, cannot implement, and cost is high.

Summary of the invention

The deficiency high to place space requirement for existing hanging method, construction machinery dependence is strong, cost is high, the invention provides a kind of large-span steel girder construction method for hanging of Simple And Practical economy.

Below the large-span steel girder construction method for hanging of introducing in detail a kind of Simple And Practical economy of the present invention, completes as follows:

1) large-span steel girder is divided into several segments, in the overlayable region of tower crane, first utilize tower crane by every segment steel beam lifting to the flooring region of constructing; 2), encryption needs the template framed bent in lifting region, and sets up the cross bar of laying portable cucurbit hook position; 3) at tower crane, can not in the scope of overwrite job, adopt steel pipe and crowbar to coordinate mobile segment girder steel; When segment girder steel moves to the end that one end of portable cucurbit is buckled in after preset range to little girder steel, the other end is buckled on the template framed bent in girder steel the place ahead on little cross bar, and 4) for convenience of little girder steel, move horizontally, the steel pipe that supports segment girder steel is vertical with little girder steel without exception; When segment girder steel is pulled in template framed bent behind relevant position by portable cucurbit, carry out the vertical movement of segment girder steel; 5) the vertical movement of girder steel, selects 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 hang portable cucurbit on little cross bar respectively increase an oblique vertical rod and little cross bar is fixed with fastener, and bottom of upright rod and lower crosspiece are fixed with fastener, form stable three-legged structure; Guarantee girder steel lifting process safety; 6) when portable cucurbit rises to segment girder steel after predetermined absolute altitude, 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, carrying girder steel, and cross bar adopts fastener to be connected with both sides vertical rod, and insurance fastener is set up in bottom; Adopt levelling tube to check after the absolute altitude of both sides, adjust the Support Position of cross bar.7) adopt same method lift other section of girder steel in span, complete assembledly, in assembled process, employing levelling tube is checked outside whole section of level absolute altitude, and the horizontal range that also should adopt tape measure to check girder steel between each span meets design requirement.8) girder steel completes after installation, removes carrying cross bar and portable cucurbit lifting support body.

Advantage of the present invention is: adopt this method to carry out large-span steel girder construction, it is all artificial and simple portable cucurbit operation, in conditions permit situation, also can adopt tower crane less important work, simple, convenient, economical, reduce the dependence to large tonnage crane and tower crane, reduce the requirement to space, place, required framed bent only makes the appropriate adjustments on original template supporting row frame basis, greatly reduces construction cost.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the present invention is further described

Fig. 1 is steel lifting component drawing

Fig. 2 is that girder steel moves horizontally schematic diagram

Fig. 3 is that hoisting steel beam level is with regard to bitmap

Fig. 4 is that former full hall frame is set up lifting support body schematic diagram

Fig. 5 is the vertical mobile schematic diagram of girder steel

Fig. 6 is the vertical mobile elevation of girder steel

Fig. 7 is the vertical mobile sectional drawing of girder steel

Fig. 8 is reinforcing figure at the bottom of the girder perch back rest

1. tower cranes in 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, on steel pipe 5, utilize manpower to pull Chain block 4, thereby girder steel 3 are moved horizontally

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

In Fig. 5, Chain block 4 is buckled on two, the back tie point of girder steel 3, utilize manpower to pull Chain block 4, thereby girder steel 3 is vertically moved

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

Claims

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

1) according to construction requirement, large-span steel girder is divided into several segments, utilize tower crane or hoist engine by every section of steel beam lifting to closing on construction area, operating radius adopts steel pipe and crowbar to coordinate mobile segment girder steel outward;

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

3) with portable cucurbit, segment girder steel is risen to predetermined absolute altitude, 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 both sides vertical rod, divides into two fasteners, carrying girder steel;

4) adopt levelling tube to check after the absolute altitude of girder steel both sides, adjust the Support Position of cross bar; With same method, lifted other section of girder steel in span, completed assembled;

5) adopt same method lift other span girder steels, and complete assembledly, between each span, girder steel employing invar tape is checked the horizontal range of girder steel, makes to meet designing requirement;

6) girder steel is assembled complete after, remove auxiliary little cross bar and vertical rod for lifting, set up template die, concreting.