CN203383148U

CN203383148U - Span internal lifting device for small prefabricated box girders

Info

Publication number: CN203383148U
Application number: CN201320366957.9U
Authority: CN
Inventors: 谢含军; 王善波; 周朝阳; 袁兵; 廖继军; 金程
Original assignee: Ningbo Municipal Engineering Construction Group Co Ltd
Current assignee: Ningbo Municipal Engineering Construction Group Co Ltd
Priority date: 2013-06-25
Filing date: 2013-06-25
Publication date: 2014-01-08
Anticipated expiration: 2023-06-25

Abstract

A span internal lifting device for small prefabricated box girders mainly comprises a main girder of a bridge girder erection machine, wherein a front auxiliary supporting leg of the bridge girder erection machine, a front supporting leg of the bridge girder erection machine and a middle supporting leg of the bridge girder erection machine are successively connected to the lower portion of the main girder of the bridge girder erection machine; the main girder of the bridge girder erection machine is positioned on a bridge abutment through the front auxiliary supporting leg of the bridge girder erection machine, the front supporting leg of the bridge girder erection machine and the middle supporting leg of the bridge girder erection machine; the upper portion of the main girder of the bridge girder erection machine is connected with two winch crane carriages; the cross-span distance between the front supporting leg of the bridge girder erection machine and the middle supporting leg of the bridge girder erection machine on the main girder of the bridge girder erection machine is greater than the length of a bridge span to be erected; and the length of the bridge span to be erected is equal to the distance between a front capping girder and a rear capping girder. A foundation of the bridge abutment is not required to be treated, a girder lifting station is not required to be arranged on the bridge span to be erected either, the construction period and the cost for the working procedures are saved, and the economic benefit and the social benefit are high; and moreover, prefabricated box girders are not required to be conveyed on a bridge floor, and the safety on construction is improved.

Description

Play boom device in a kind of Small Precast Box girder span

Technical field

The utility model relates to a boom device in a kind of Small Precast Box girder span.

Background technology

The little box beam bridge formation machine general work step of tradition is: beam prefabricated → little case beam transportation of little case → work winching to bridge floor → bridge floor transportation → feeding beam → little box beam erection.When the feeding beam method is installed, the ground processing is carried out at reply abutment position, so that bridge on prefabricated small box girder; Or waiting to build bridge across the bale handle station is installed, the prefabricated small box girder vertical transport is carried out to feeding beam to bridge floor transporting the Bridge Erector afterbody to.The little box beam bridge formation machine construction construction sequence of tradition is complicated, need to wait until that abutment construct after, could transport prefabricated small box girder, and the work of setting up must be from the abutment position, construction period length, required manually to reach machinery expenses many.When little case beam transports on bridge floor, due to also not completion of bridge, overall construction intensity does not reach designing requirement, has certain potential safety hazard.

Summary of the invention

The purpose of this utility model is to overcome the deficiency that prior art exists, and a kind of simplification Small Precast Box erection operation is provided, and to reach to shorten, sets up the duration, plays boom device in the Small Precast Box girder span of cost reduction target.

The purpose of this utility model completes by following technical solution, it mainly comprises crane ' s major girder, the below of described crane ' s major girder is connected with supporting leg in secondary supporting leg before Bridge Erector, front outrigger for bridge girder erection machine, Bridge Erector successively, this crane ' s major girder by Bridge Erector before in secondary supporting leg, front outrigger for bridge girder erection machine, Bridge Erector supporting leg be positioned on abutment; Be connected with two Bridge Erector elevator trolleys above this crane ' s major girder.

As preferably, the mistake span in the front outrigger for bridge girder erection machine on described crane ' s major girder and Bridge Erector between supporting leg from be greater than wait to build bridge across length, this wait build bridge across length be front bent cap and after distance between bent cap.

The beneficial effects of the utility model are: in the Small Precast Box girder span, beam method installation engineering method only needs beam prefabricated → little case beam transportation of little case → little case beam lifting to set up three steps, with conventional construction method, compare, reduced and winched to the steps such as bridge floor, bridge floor transportation, feeding beam, without the ground processing is carried out in the abutment position, or waiting to build bridge across treatment measures such as installation bale handle stations, save required duration of these operations and expense, there is good economic benefit and society benefit; And, without transport prefabricated small box girder on bridge floor, improved the safety of construction.

The accompanying drawing explanation

Fig. 1 is the reconditioner bit architecture schematic diagram of beam in the utility model Small Precast Box girder span.

Fig. 2 is that in the utility model Small Precast Box girder span, the girder of beam is crossed across structural representation.

Fig. 3 is that in the utility model Small Precast Box girder span, the supporting leg of beam is crossed across structural representation.

Fig. 4 is that in the utility model Small Precast Box girder span, completing of beam moved across structural representation.

Fig. 5 is the bale handle lift structure schematic diagram of beam in the utility model Small Precast Box girder span.

Fig. 6 is the bale handle positioning structure schematic diagram of beam in the utility model Small Precast Box girder span.

Fig. 7 is the leap bent cap structural representation of beam in the utility model Small Precast Box girder span.

Fig. 8 is the girder construction schematic diagram that falls in place of beam in the utility model Small Precast Box girder span.

Label in accompanying drawing is respectively: 1, secondary supporting leg before Bridge Erector; 2, front outrigger for bridge girder erection machine; 3, supporting leg in Bridge Erector; 4, Bridge Erector elevator trolley; 5, prefabricated small box girder; 6, crane ' s major girder; 7, abutment; 8, front bent cap; 9, rear bent cap.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is done to detailed introduction: as shown in accompanying drawing 1～8, the utility model mainly comprises crane ' s major girder 6, the below of described crane ' s major girder 6 is connected with supporting leg 3 in the front secondary supporting leg 1 of Bridge Erector, front outrigger for bridge girder erection machine 2, Bridge Erector successively, and this crane ' s major girder 6 is positioned on abutment 7 by supporting leg 3 in secondary supporting leg 1, front outrigger for bridge girder erection machine 2, Bridge Erector before Bridge Erector; Be connected with two Bridge Erector elevator trolleys 4 above this crane ' s major girder 6.In front outrigger for bridge girder erection machine 2 on described crane ' s major girder 6 and Bridge Erector the mistake span of 3 of supporting legs from be greater than wait to build bridge across length, this wait build bridge across length be front bent cap 8 and after the distance of 9 of bent caps.

The application of beam method installation engineering method in practice of construction in the Small Precast Box girder span, it sets up step:

(1) adjust the distance of 3 of supporting legs in front outrigger for bridge girder erection machine 2 and Bridge Erector, vertical shift purlin car falls back on the Bridge Erector rear portion, two supporting leg spacings are met before complete machine move past across stability requirement, to meet girder simultaneously and cross the requirement of span length's degree;

(2) utilize the power of supporting leg 3 in front outrigger for bridge girder erection machine 2, Bridge Erector, promote crane ' s major girder 6 bent cap 8 direction vertical shifts forward, make the front secondary supporting leg 1 of Bridge Erector arrive front bent cap 8 places;

(3) prop up the front secondary supporting leg 1 of good Bridge Erector, utilize the erecting by overhang of front outrigger for bridge girder erection machine 2 that front outrigger for bridge girder erection machine 2 is run to front bent cap 8 places, lay the cross moving track beam, a good front outrigger for bridge girder erection machine 2;

(4) utilize the power of supporting leg 3 in front outrigger for bridge girder erection machine 2, Bridge Erector to continue crane ' s major girder 6 is gone to operating position, Bridge Erector is in running order;

(5) prefabricated small box girder 5 is transported to wait to build bridge by fortune beam gun carriage and chooses the arm below across bent cap, and the reserved hole for hoist that makes prefabricated small box girder 5 front ends on horizontal plane with front bent cap 8 sidelines in a distance;

(6) use Beam transportation vehicle that prefabricated small box girder 5 is transported under bridge, tied wire rope, hang up properly suspension hook, make prefabricated small box girder 5 rear end levels to the about 30cm of the rear bent cap 9 of distance, then start Bridge Erector elevator trolley 4 and promote beam slab;

(7) use two of the front and back Bridge Erector elevator trolley 4 on Bridge Erector, prefabricated small box girder 5 is risen to apart from 30cm place, bent cap below simultaneously, finely tune again prefabricated small box girder 5 position in the plane, guarantee that its rear end level is to leaving the bent cap distance, do not clash into bent cap when prefabricated small box girder 5 is inclined upwardly motion;

(8) start the Bridge Erector elevator trolley 4 of Bridge Erector rear end, promote prefabricated small box girder 5 rear ends, make 5 ends of its prefabricated small box girder higher than the about 50cm of bent cap or higher than the plate certain distance of setting a roof beam in place, then start vertical shift purlin car backward bent cap 9 directions move precast beam, until prefabricated small box girder 5 front ends leave front bent cap 8 view fields, guarantee that level is to leaving the bent cap distance, do not clash into bent cap when prefabricated small box girder 5 front ends are inclined upwardly motion;

(9) start the Bridge Erector elevator trolley 4 of Bridge Erector front end, promote prefabricated small box girder 5 front ends, adjust its level of the high official post in precast beam two ends, start Bridge Erector vertical shift purlin car, traversing roller, make that prefabricated small box girder 5 is in place, beam falls;

(10) after completing across interior beam, if the lateral attitude of prefabricated small box girder 5 differs too much apart from installation site, should first use the traversing method of complete machine, in the time of in Distance Shortened arrives Bridge Erector elevator trolley 4 traversing distance ranges, use Bridge Erector elevator trolley 4 traversing beam slabs in place.

The utility model is not limited to above-mentioned embodiment; no matter do any variation on its shape or material formation; every employing structure design provided by the utility model, be all a kind of distortion of the present utility model, all should think within the utility model protection domain.

Claims

1. play boom device in a Small Precast Box girder span, mainly comprise crane ' s major girder (6), it is characterized in that: the below of described crane ' s major girder (6) is connected with supporting leg (3) in the front secondary supporting leg (1) of Bridge Erector, front outrigger for bridge girder erection machine (2), Bridge Erector successively, and this crane ' s major girder (6) is positioned on abutment (7) by supporting leg (3) in secondary supporting leg (1), front outrigger for bridge girder erection machine (2), Bridge Erector before Bridge Erector; Be connected with two Bridge Erector elevator trolleys (4) in the top of this crane ' s major girder (6).

2. play boom device in Small Precast Box girder span according to claim 1, it is characterized in that: the mistake span in the front outrigger for bridge girder erection machine (2) on described crane ' s major girder (6) and Bridge Erector between supporting leg (3) from be greater than wait to build bridge across length, this wait build bridge across length be the distance between front bent cap (8) and rear bent cap (9).