CN101333802A

CN101333802A - Vertical conversion process of TC5015 tower crane in construction of high pier and long span bridge

Info

Publication number: CN101333802A
Application number: CNA2008101503924A
Authority: CN
Inventors: 宁卉; 冀凤卿; 王翻云
Original assignee: Second Engineering Co Ltd of 17th Bureau of China's Railroad Group
Current assignee: Second Engineering Co., Ltd. of 17th Bureau of China's Railroad Group; China Railway Construction Corp Ltd CRCC
Priority date: 2008-07-18
Filing date: 2008-07-18
Publication date: 2008-12-31
Anticipated expiration: 2028-07-18
Also published as: CN101333802B

Abstract

The invention discloses a vertical conversion method of a TC5015 tower crane used in building a high-pier long-span bridge, comprising steps as follows: firstly, the middle of each horizontal collar beam of the bridge pier is reserved with a square hole, so that the tower crane goes through the square hole of each horizontal collar beam of the entire bridge pier; secondly, when the bridge pier is built up to the collar beam which is nearly as high as the top of the tower crane, two hidden beams, the spacing between which is larger than the square hole reserved in the middle of the horizontal collar beam, are poured along between two limbs of the pier below the horizontal collar beam; before the hidden beams are poured, conversion devices of load-bearing base of the tower crane are pre-embedded on both sides of a reserved square hole in a location where the hidden beams are designed to be poured; thirdly, the hidden beams are poured, until the concrete achieves a designed strength, conversion devices of tower crane load-bearing base and the tower crane are integrated into an entirety; fourthly, part of standard sections of the tower crane below the hidden beams are removed, the removed standard sections are installed continuing standard sections of the tower crane on top of the hidden beams which are used as new tower crane load-bearing bases and the horizontal collar beams, and the transfer of the tower crane load-bearing bases to the hidden beams and the horizontal collar beam is completed at once, so that the tower crane can be raised relatively.

Description

The vertical conversion of TC5015 tower crane in the high pier long span bridge construction

Technical field

The present invention relates to the vertical conversion of TC5015 tower crane in a kind of high Dun Dakuaqiaoliang construction.

Background technology

Existing bridge construction is crossed over the great rivers deep valley in building, and the constructing structure thing is more and more higher, and vertical material installation transportation can only be considered disposable big tower crane to the top.But when the works height surpasses tower crane height, during as TC5015 tower crane commonly used (height 43m), vertical handling appliance type selecting will be restricted, tower crane that necessary corresponding employing is higher or special big tower crane, thereby make the standard knot consumption big, vertical handling cost increases greatly.

Summary of the invention

The technical problem that will solve required for the present invention is to provide a kind of works of working as, after particularly high Dun Dakuaqiaoliang construction reach a certain height, the little tower crane of general T C5015 is made its jacking of foundation to one new height and position by conversion equipment, so repeatedly basis conversion can successfully solve and utilize height to reach more than the 178m for the height of vertical handling construction material of the tower crane of 43m and equipment.

In order to achieve the above object, the present invention takes following technical scheme to be achieved:

The vertical conversion of TC5015 tower crane is characterized in that in a kind of high pier long span bridge construction, comprises the steps:

The first step: in the middle of the bridge pier straining beam, all reserve square hole, make tower crane pass the square hole of each road straining beam of whole pier shaft;

Second step: when Bridge Pier Construction near the straining beam of tower crane cat head height the time, below the straining beam along pier shaft between two limbs cast two track pitches greater than the dark beam of reserving square hole in the middle of the straining beam; Before the dark beam of cast, pour into a mould pre-buried tower crane load basis, the reservation square hole both sides conversion equipment of dark beam position earlier in desire;

The 3rd step: pour into a mould dark beam, treat that concrete reaches design strength after, make tower crane load basis conversion equipment and tower crane become integral body;

The 4th step: the standard knot of removing dark beam below part tower crane, and the standard knot of continuity removal and installation on tower crane standard knot above the dark beam on new load basis and the straining beam as tower crane, finish tower crane load basis and once transfer on this straining beam and the dark beam, tower crane is raise relatively;

The 5th step: repeat second and went on foot for the 4th step, can finish tower crane load basis and shift once more or repeatedly.

In the said method, during the dark beam of described cast, dark beam is with the bridge pier straining beam structure once-cast as tower crane load basis.Described tower crane load basis conversion equipment comprises upper and lower two pre-buried junction plates that are cast in the dark beam and the pre-embedded bolt that wherein is installed with, after the dark beam concrete of being poured into a mould reaches design strength, on straining beam, install the upper end that ring beam connects pre-embedded bolt around the tower crane standard knot, the connection bracket is installed on the last ring beam, will be connected the welding of bracket and standard knot; And under installing around the tower crane standard knot under the dark beam joist, and connect the pre-embedded bolt lower end, make conversion equipment and tower crane become integral body.The dark beam in described tower crane conversion load basis adopts and works straining beam steel concrete at the same level, and is not less than C50.Describedly be preferably 3.2 meters along the dark case bay of twice of pouring into a mould between the two limbs of pier shaft.

Advantage of the present invention is, taken into full account the influence that the maximum construction weight of works, only tower height degree, tower crane length of steel wire rope etc. are brought construction, adopt the small-sized tower crane TC5015 of economical rationality, handling safety, ingenious utilization is provided with conversion equipment and makes its tower crane load jacking of foundation to one new height and position on the pier shaft straining beam, so repeatedly basis conversion, can successfully the TC5015 tower crane be transformed into high pier bridge bridge floor construction more than the 178m, thereby vertical handling cost is reduced greatly.Also can be widely used in the Other Engineering technical field of construction of industry and the requirement of civilian construction high-level structure.

Description of drawings

Fig. 1, Fig. 2 are for using the load basis conversion method schematic diagram of little tower crane in the high pier of the present invention.Wherein Fig. 1 is high pier front; Fig. 2 is high pier side view.Among the figure: 1, tower crane standard knot; 2, connect bracket; 3, go up ring beam; 4, following joist; 5, dark beam; 6, straining beam; 7, pier shaft; 8, dividing plate; 9, pre-buried junction plate; 10, pre-embedded bolt; 11, reserve square hole.

The specific embodiment

The present invention is described in further detail below in conjunction with drawings and the specific embodiments.

Shown in Figure 2 as Fig. 1, in the middle of bridge pier straining beam 6, all reserve 2 * 2 meters square holes 11, make the little tower crane of TC5015 pass the square hole 11 of each road straining beam of whole pier shaft; When the straining beam 6 of constructing near tower crane cat head height, below the straining beam along cast two track pitches between 7 pairs of limbs of pier shaft greater than the dark beam 5 of reserving square hole in the middle of the straining beam; This is because straining beam is generally only thick for 50cm, therefore can not be separately as the basis of bearing tower crane transmission sound load, so the present invention increases by two dark beams 5 along pier shaft 7 directions below straining beam 6, its spacing is 3.2 meters.

Dark beam 5 adopts and works (straining beam 6) steel concrete at the same level, and intensity is not less than label C50, and dark beam 5 bears the sound load jointly with straining beam 6 and passes to pier shaft 7.Earlier pre-buried junction plate 9 in the conversion equipment and pre-embedded bolt 10 are embedded in reservation square hole 11 both sides that desire is poured into a mould dark beam position before the concrete pouring, conversion equipment also comprises ring beam 3 and bracket 2, descends joist 4; Pre-embedded bolt 10 adopts the 40Cr material.The location-plate exposed face of built-in fitting should expose straining beam top of concrete 5mm, planeness 1.0mm; The interval error of pre-embedded bolt 10 is not more than 1.5mm.Dark beam 5 is with straining beam 6 once-casts.After concrete reaches design strength, on straining beam 6, install ring beam 3, connect pre-embedded bolt 10 upper ends, connection bracket 2 is installed on last ring beam then, and will connect

bracket

2 and 1 welding of tower crane standard knot; Joist 4 down is installed again, is connected pre-embedded bolt 10 lower ends, make tower crane load basis conversion equipment and tower crane become integral body.At last, remove the standard knot 1 ' of dark beam below part tower crane, and the standard knot 1 ' of continuity removal and installation on the straining beam 6 on the new load basis as tower crane and the tower crane standard knot 1 above the dark beam 5, finish tower crane load basis and once transfer on this straining beam and the dark beam, tower crane is raised relatively; Remove standard knot 1 ' available 5 tons of electric winchs and TC5015 tower crane and cooperate dismounting.

After tower crane load basis once converts, continuation is carried out building operations to the body of a bridge 7, when constructing height new, having carried out the little tower crane of TC5015 once changed on the load basis again can the incompatible vertically height of handling, can repeat the method that once change on aforementioned load basis this moment, finishes tower crane load basis and transfer on the straining beam of new high degree once more or repeatedly.For example shift through four times, utilize height for the little tower crane of 43m finally vertically the height of handling construction material and equipment reach more than the 200m.

Claims

1, the vertical conversion of TC5015 tower crane in a kind of high pier long span bridge construction is characterized in that, comprises the steps:

2, the vertical conversion of TC5015 tower crane in the construction of high according to claim 1 pier long span bridge is characterized in that, during the dark beam of described cast, and dark beam and bridge pier straining beam structure once-cast as tower crane load basis.

3, the vertical conversion of TC5015 tower crane in the high as claimed in claim 1 or 2 pier long span bridge construction, it is characterized in that, described tower crane load basis conversion equipment comprises upper and lower two pre-buried junction plates that are cast in the dark beam and the pre-embedded bolt that wherein is installed with, after the dark beam concrete of being poured into a mould reaches design strength, on straining beam, install the upper end that ring beam connects pre-embedded bolt around the tower crane standard knot, the connection bracket is installed on the last ring beam, will be connected the welding of bracket and standard knot; And under installing around the tower crane standard knot under the dark beam joist, and connect the pre-embedded bolt lower end, make conversion equipment and tower crane become integral body.

4, the vertical conversion of TC5015 tower crane in the high as claimed in claim 1 or 2 pier long span bridge construction is characterized in that, the dark beam in described tower crane conversion load basis adopts and straining beam structure steel concrete at the same level, and is not less than C50.

5, the vertical conversion of TC5015 tower crane in the construction of high as claimed in claim 1 or 2 pier long span bridge is characterized in that, describedly is preferably 3.2 meters along the dark case bay of twice of pouring into a mould between the two limbs of pier shaft.