CA2083551A1 - Installation system for bridge girders - Google Patents
Installation system for bridge girdersInfo
- Publication number
- CA2083551A1 CA2083551A1 CA 2083551 CA2083551A CA2083551A1 CA 2083551 A1 CA2083551 A1 CA 2083551A1 CA 2083551 CA2083551 CA 2083551 CA 2083551 A CA2083551 A CA 2083551A CA 2083551 A1 CA2083551 A1 CA 2083551A1
- Authority
- CA
- Canada
- Prior art keywords
- track
- girder
- bridge
- assembly
- lifting
- Prior art date
- 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.)
- Abandoned
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
Abstract
INSTALLATION SYSTEM FOR BRIDGE GIRDERS
ABSTRACT
A system for installing precast concrete bridge girders is disclosed in which there is provided a guide track having a pair of spaced track elements on top of which two lifting gantries can run. The track is moved to a position spanning the intended bridge area above the constructed bridge abutments. A bridge girder is backed into position bridge abutments. A bridge girder is backed into position between the track elements and lifted by one of the gantries and then pushed across the area to be spanned by the transportation vehicle and the gantry. A forward end of the girder is then lifted by the second gantry and moved into position. With the ends of the girder above the abutments and carried by the gantries, the gantries can be lowered to move the girder downwardly onto the abutments. This avoids the expensive use of heavy cranes.
ABSTRACT
A system for installing precast concrete bridge girders is disclosed in which there is provided a guide track having a pair of spaced track elements on top of which two lifting gantries can run. The track is moved to a position spanning the intended bridge area above the constructed bridge abutments. A bridge girder is backed into position bridge abutments. A bridge girder is backed into position between the track elements and lifted by one of the gantries and then pushed across the area to be spanned by the transportation vehicle and the gantry. A forward end of the girder is then lifted by the second gantry and moved into position. With the ends of the girder above the abutments and carried by the gantries, the gantries can be lowered to move the girder downwardly onto the abutments. This avoids the expensive use of heavy cranes.
Description
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,, _.. , 1 INSTALLATION SYSTEM FOR BRIDGE GIRDERS
This invention relates to an installation system for bridge girders.
I BACKGROUND OF THE INVENTION
, I Smaller highway bridges are often constructed of I bridge abutments which are formed on either side of the area to be spanned together with a precast concrete girder system which is mounted on the bridge abutments and spans the space therebetween. Often the bridge girders are formed as elongate elements of approximately four feet transversed dimension and these are laid side by side spanning the space between the bridge abutments for subsequent construction of a road surface on top of the girders.
The precast concrete girders are formed at a separate location and are transported by road from the place of manufacture to the installation site. Bridge girders of this type can weigh of the order of 40 tons and hence are of course difficult to transport ancl more difficult to manoeuvre into place.
The conventional technique for handling the bridge girders at the installation site is to transport a crane to the site of a size sufficient to lift and manoeuvre the girders into position spanning the space between the bridge abutments. Such a crane is itself heavy and difficult to -transport by road and extremely expensive to purchase, lease or maintain. The installation of such bridges at relatively remote locations is of further expense in view of the costs involved in leasing or holding the equipment during the 2 2 0 ~ 3 ~ ~ ~
transportation time.
SUMMARY OF THE INVENTION
It is one object of the present invention, therefore, to provide an improved system for installation of bridge girders.
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,, _.. , 1 INSTALLATION SYSTEM FOR BRIDGE GIRDERS
This invention relates to an installation system for bridge girders.
I BACKGROUND OF THE INVENTION
, I Smaller highway bridges are often constructed of I bridge abutments which are formed on either side of the area to be spanned together with a precast concrete girder system which is mounted on the bridge abutments and spans the space therebetween. Often the bridge girders are formed as elongate elements of approximately four feet transversed dimension and these are laid side by side spanning the space between the bridge abutments for subsequent construction of a road surface on top of the girders.
The precast concrete girders are formed at a separate location and are transported by road from the place of manufacture to the installation site. Bridge girders of this type can weigh of the order of 40 tons and hence are of course difficult to transport ancl more difficult to manoeuvre into place.
The conventional technique for handling the bridge girders at the installation site is to transport a crane to the site of a size sufficient to lift and manoeuvre the girders into position spanning the space between the bridge abutments. Such a crane is itself heavy and difficult to -transport by road and extremely expensive to purchase, lease or maintain. The installation of such bridges at relatively remote locations is of further expense in view of the costs involved in leasing or holding the equipment during the 2 2 0 ~ 3 ~ ~ ~
transportation time.
SUMMARY OF THE INVENTION
It is one object of the present invention, therefore, to provide an improved system for installation of bridge girders.
3 According to a first aspect of the invention there is provided a method for installing a precast concrete bridge girder for the girder to extend from a first bridge abutment at one end to a second bridge abutment at a second end of the girder and to span an area to be bridged, the method ' comprising providing a track girder assembly, a first lifting ~ gantry and a second lifting gantry, the track girder assembly ¦ forming an elongate guide track on which the lifting gantries ~ can run longitudinally of the guide track, mounting the track i girder assembly so as to span the area to be bridged, mounting the first and second gantries on the track girter assembly, transporting the bridge girder to a position with one end of the bridge girder adjacent one end of the track girder assembly such that a second end of the bridge girder is spaced from a second end of the track girder assembly and aligned therewith, attaching said one end of the bridge girder to the first lifting gantry to be carried thereby, moving the bridge girder longitudinally of the track girder assembly such that said one end is carried by the first lifting gantry while moving along the track girder assembly, attaching said second end of the bridge girder to the second ~; . . ,~
lifting gantry, moving the first and second lifting gantries ' .~ ,. . .
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longitudinally of the track girder assembly while carrying the bridge girder to positions such that the first and second ends of the bridge girder are substantially aligned ~ith the bridge abutments and simultaneously actuating the first and second lifting gantries to lower the bridge girder onto the first and second bridge abutments According to a second aspect of the invention there is provided a apparatus for installing a precast concrete bridge girder for the girder to extend from a first bridge abutment at one end to a second bridge abutment at a second end and spanning an area to be bridged, the apparatus comprising a track girder assembly forming a elongate guide track for spanning between the first and second bridge abutments, a first lifting gantry and a second lifting gantry each for mounting on the track girder assembly for movement longitudinal thereof, each lifting gantry including means for supporting the bridge girder, ram means for lifting said support means vertically, and means mounting said track girder assembly for movement side to side in a direction generally at right angles to the length of the track girder assembly.
One embodiment of the invention will now be described :. in conjunction with the accompanying drawings in which DESCRIPTION OF THE_DRAWINGS
Figure 1 is a side elevational view of the apparatus ~ for installing a bridge girder according to the present `~ invention.
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., E'igure 2 is a similar side elevational view showing an initial step of the installation method using the apparatus of Figure 1.
Figure 3 is a top plan view of the apparatus as shown in Figure 2.
Figure 4 is a side elevational view of one of the lifting gantries of Figure 1.
Figure 5 is a cross sectional view along the lines 5-5 of Figure 4.
Figure 6 irS cross sectional view along the lines 6-6 :~ of Figure 4.
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In the drawings like characters of reference indicate corresponding parts in the different figures.
DETAILED DESCRIPTION
Referring firstly to Figures 1, 2 and 3, the apparatus for the installation system comprises a track girder assembly 10, a first lifting gantry 11, a second lifting gantry 12, a first sliding support beam 13 and a second sliding support beam 14, each for supporting a respective end of the track girder assembly.
The bridge structure includes a first bridge abutment 15 and a second bridge abutment 17 which are built on the ground surface at a position spaced apart on either side of a area 17 to be spanned by the completed bridge. The completed bridge includes a bridge girder 1~ which is mounted upon a support shelf of the bridge abutments 15, 16 so as to be supported thereby in a spanning arrangement over the area 17.
In an initial construction step, the bridge abutments . ~
, - 5 - ~ ~83~1 and 16 are constructed by the insertion of supporting piles and the casting of the concrete s~ructures forming the abutments. The precast concrete beams 18 are manufactured in a conventional process at a manufacturing site and are transported by transportation truck 19 from the site of manufacture to the installation location at the abutments 15 and 16. One bridge girder is shown installed at 18 and a ~ second bridge girder 20 is shown in the installation process.
;, The sliding beam supports 13 and 14 are mounted on a 10suitable wooden base which is temporarily laid from the ground structure onto the top of the abutments to provide a base structure for receiving the installation system. Each of the sliding beams 13, 14 includes a base beam 21 on which is mounted a sliding platform portion 22 which slides longitudinally of the base beam 21 so as to adjust the position of the track girder assembly laterally of the abutments 15 and 16.
The track girder assembly comprises a pair of track elements 24 and 25 which are arranged in a common horizontal 20plane and extent in parallel spaced relationship across the area to be spanned and supported upon the platforms 22. The ~ platforms are notched so as to receive the track elements and ;~ hold them at the required spaced location. Each track element is of the construction as shown best in Figure 5 including a pair of vertical I-beams 26 and 27 which are connected by a base plate 28 and by a top plate 29 to form an integral beam of sufficient mechanical strength to carry out ., .~
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the functions as set forth hereinafter~
~ Each track element has a length sufficient to extend3 from the abutment 15 across to the abutment 15 and beyond the abutment 15 to an outer end 71 which is supported in cantilever arrangement from the two abutments. The track elements are unconnected apart from three braces 30, 31 and 32 which connect the track elements at a position adjacent a I centre point of the span between the abutments to hold the ; track elements against relative longitudinal movement or transverse movement under the heavy loading carried by the lifting gantry as it moves across the span.
The construction of the lifting gantry is best shown in Figures 4, 5 and 6 and includes a U shaped base best visible in Figure 6 having a pair of side beams 33 and 34 and a cross connecting beam 35. Each of the side beams 33 and 34 carries a pair of rollers 36 and 37 mounted on pillow blocks 38 mounted on an under side of the beam. Roller 36 is arranged at one end of the beam and a roller 37 is arranged ¦ at the opposed end of the beam. Each of the rollers comprised a cylindrical body having a width just greater than the width of the respective track element and a pair of flanges 39 and 40 at ends of the cylindrical body forming the roller so as to hold the roller in position on the top flange 29 of the track element. Thus the base can roll along the track girder assembly for transportation of the lifting gantry from the open outer end towards the abutment 16.
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~ On top of the base is provided a generally pyramid , - 7 -2~3~5~
shaped support frame 41. The support frame includes two main vertical beams 42 and 43 each mounted on a respective side frame element and extending vertically upwardly therefrom at a central position thereon. The vertical beams 42 and 43 are braced by a pair of inclined beams 44 and 45 on the side frame 33 and inclined beams 46 and 47 on the side frame 34.
At the top of the frame structure, a transverse beam 48 interconnects the incline beams 44 and 45 and a cross beam 50 extends across the top between the two side frames.
Lif~ing frame 50 comprises a cross-beam structure 51 including a pair of spaced beams 52 and 53 which are arranged forwardly and rearwardly respectively of the vertical post 42, 43. The cross beam 51 carries a sliding sleeve 54 which can be moved across the width of the lifting gantry by a hydraulic cylinder 55. The sleeve 54 carries a pair of U-shaped supports 56 and 57 to which the girder 18 can be attached by cables 58.
The cross beam 51 is supported at each end by an inverted U-shaped structure 56 including a cross member 59 and a pair of depending legs 60 each of which is attached to an end of a respectiv~ one of the beams 52 and 53. The cross members 59 at each end of the lifting frame are attached to the top end of a cylinder 62 which is a multi-stage cylinder acting to lift the lifting frame by distance of the order of ten feet to provide sufficient liEting action for the installation process.
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;~ Turning again to Figures 1, 2 and 3, firstly the ~,~
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, ;!" track girder assembly is moved into position across the area " to be spanned by a suitable technique. One example, the track elements are moved across by pushing a first track element part way across and then sliding a second track ~;,i element over the first. The track elements are relatively light in comparison with the bridge girders and therefore can be handled relatively easily by the type of crane available on vehicles for moving equipment and similar items. Once the track girder assembly is in place, the lifting gantries are ~ 10 positioned on top of the track girder assembly for rolling '~ movement along the top surface of the track elements.
The girder to be installed as indicated at 20 is then brought into position on the transport vehicle 19. The track elements are spaced by width sufficient to receive the rear transportation dolly 70 of the transport vehicle between the track elements so that the girder 20 is moved to a position between the cantilevered end 71 of the track assembly. The lifting gantries are then moved into position on top of the portion of ~he girder 20 and the outer one of the lifting gantries is connected to the girder while in a raised position or just below the fully raised position and then the lifting gantry is actuated to lift to the top of the raised position to lift -the girder away from the dolly 70. The dolly 70 can then be moved out of the area. The tractor unit of the transportation vehicle is then backed up pushing the lifting gantry 11 and the girder across the track girder l ~
assembly until the forward end of the girder 20 is positioned ~ ~.''' i`',l ':.
~ 9- 20~3~5~
between the ends 71 of the track elements. The lifting 3 gantry 12 is then operated to lift the forward end of the girder so that the girder is then wholly carried on the lifting gantries. The girder on the gantries are then moved again in a longitudinal direction to take up a position ;~ directly overlying the abutments as shown in Figure 1. In this posi~ion the lifting gantries can be lowered by retracting the cylinders 62 to lower the girder into position on the abutment. If necessary, if the amount of movement is greater than the stroke of the cylinder 62, it is possible to block up the girder at each end and then to restart the stroke by re-engaging the girder with longer cables.
;i~ In order to allow the girder to be lowered through the area between the track elements, it is necessary temporarily to release the braces 30, 31 and 32 and to pivot these to one side to allow the girder to pass therebetween.
The wide spacing between the track elements allows at least one second girder to be moved into place without shifting the !.dd track elements. The can be effected by the transverse movement of the lifting frame. Once the full extent available between the track elements has been utilized, it is necessary to move the track elements trasversely by the sliding platform 22.
Since various modifications can be made in my invention as hereinabove described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it is .,, . . ~ !, .,' :
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intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
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lifting gantry, moving the first and second lifting gantries ' .~ ,. . .
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longitudinally of the track girder assembly while carrying the bridge girder to positions such that the first and second ends of the bridge girder are substantially aligned ~ith the bridge abutments and simultaneously actuating the first and second lifting gantries to lower the bridge girder onto the first and second bridge abutments According to a second aspect of the invention there is provided a apparatus for installing a precast concrete bridge girder for the girder to extend from a first bridge abutment at one end to a second bridge abutment at a second end and spanning an area to be bridged, the apparatus comprising a track girder assembly forming a elongate guide track for spanning between the first and second bridge abutments, a first lifting gantry and a second lifting gantry each for mounting on the track girder assembly for movement longitudinal thereof, each lifting gantry including means for supporting the bridge girder, ram means for lifting said support means vertically, and means mounting said track girder assembly for movement side to side in a direction generally at right angles to the length of the track girder assembly.
One embodiment of the invention will now be described :. in conjunction with the accompanying drawings in which DESCRIPTION OF THE_DRAWINGS
Figure 1 is a side elevational view of the apparatus ~ for installing a bridge girder according to the present `~ invention.
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., E'igure 2 is a similar side elevational view showing an initial step of the installation method using the apparatus of Figure 1.
Figure 3 is a top plan view of the apparatus as shown in Figure 2.
Figure 4 is a side elevational view of one of the lifting gantries of Figure 1.
Figure 5 is a cross sectional view along the lines 5-5 of Figure 4.
Figure 6 irS cross sectional view along the lines 6-6 :~ of Figure 4.
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In the drawings like characters of reference indicate corresponding parts in the different figures.
DETAILED DESCRIPTION
Referring firstly to Figures 1, 2 and 3, the apparatus for the installation system comprises a track girder assembly 10, a first lifting gantry 11, a second lifting gantry 12, a first sliding support beam 13 and a second sliding support beam 14, each for supporting a respective end of the track girder assembly.
The bridge structure includes a first bridge abutment 15 and a second bridge abutment 17 which are built on the ground surface at a position spaced apart on either side of a area 17 to be spanned by the completed bridge. The completed bridge includes a bridge girder 1~ which is mounted upon a support shelf of the bridge abutments 15, 16 so as to be supported thereby in a spanning arrangement over the area 17.
In an initial construction step, the bridge abutments . ~
, - 5 - ~ ~83~1 and 16 are constructed by the insertion of supporting piles and the casting of the concrete s~ructures forming the abutments. The precast concrete beams 18 are manufactured in a conventional process at a manufacturing site and are transported by transportation truck 19 from the site of manufacture to the installation location at the abutments 15 and 16. One bridge girder is shown installed at 18 and a ~ second bridge girder 20 is shown in the installation process.
;, The sliding beam supports 13 and 14 are mounted on a 10suitable wooden base which is temporarily laid from the ground structure onto the top of the abutments to provide a base structure for receiving the installation system. Each of the sliding beams 13, 14 includes a base beam 21 on which is mounted a sliding platform portion 22 which slides longitudinally of the base beam 21 so as to adjust the position of the track girder assembly laterally of the abutments 15 and 16.
The track girder assembly comprises a pair of track elements 24 and 25 which are arranged in a common horizontal 20plane and extent in parallel spaced relationship across the area to be spanned and supported upon the platforms 22. The ~ platforms are notched so as to receive the track elements and ;~ hold them at the required spaced location. Each track element is of the construction as shown best in Figure 5 including a pair of vertical I-beams 26 and 27 which are connected by a base plate 28 and by a top plate 29 to form an integral beam of sufficient mechanical strength to carry out ., .~
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the functions as set forth hereinafter~
~ Each track element has a length sufficient to extend3 from the abutment 15 across to the abutment 15 and beyond the abutment 15 to an outer end 71 which is supported in cantilever arrangement from the two abutments. The track elements are unconnected apart from three braces 30, 31 and 32 which connect the track elements at a position adjacent a I centre point of the span between the abutments to hold the ; track elements against relative longitudinal movement or transverse movement under the heavy loading carried by the lifting gantry as it moves across the span.
The construction of the lifting gantry is best shown in Figures 4, 5 and 6 and includes a U shaped base best visible in Figure 6 having a pair of side beams 33 and 34 and a cross connecting beam 35. Each of the side beams 33 and 34 carries a pair of rollers 36 and 37 mounted on pillow blocks 38 mounted on an under side of the beam. Roller 36 is arranged at one end of the beam and a roller 37 is arranged ¦ at the opposed end of the beam. Each of the rollers comprised a cylindrical body having a width just greater than the width of the respective track element and a pair of flanges 39 and 40 at ends of the cylindrical body forming the roller so as to hold the roller in position on the top flange 29 of the track element. Thus the base can roll along the track girder assembly for transportation of the lifting gantry from the open outer end towards the abutment 16.
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~ On top of the base is provided a generally pyramid , - 7 -2~3~5~
shaped support frame 41. The support frame includes two main vertical beams 42 and 43 each mounted on a respective side frame element and extending vertically upwardly therefrom at a central position thereon. The vertical beams 42 and 43 are braced by a pair of inclined beams 44 and 45 on the side frame 33 and inclined beams 46 and 47 on the side frame 34.
At the top of the frame structure, a transverse beam 48 interconnects the incline beams 44 and 45 and a cross beam 50 extends across the top between the two side frames.
Lif~ing frame 50 comprises a cross-beam structure 51 including a pair of spaced beams 52 and 53 which are arranged forwardly and rearwardly respectively of the vertical post 42, 43. The cross beam 51 carries a sliding sleeve 54 which can be moved across the width of the lifting gantry by a hydraulic cylinder 55. The sleeve 54 carries a pair of U-shaped supports 56 and 57 to which the girder 18 can be attached by cables 58.
The cross beam 51 is supported at each end by an inverted U-shaped structure 56 including a cross member 59 and a pair of depending legs 60 each of which is attached to an end of a respectiv~ one of the beams 52 and 53. The cross members 59 at each end of the lifting frame are attached to the top end of a cylinder 62 which is a multi-stage cylinder acting to lift the lifting frame by distance of the order of ten feet to provide sufficient liEting action for the installation process.
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;~ Turning again to Figures 1, 2 and 3, firstly the ~,~
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.. :,~. . :.:~ : , - 8 - 2~3~
, ;!" track girder assembly is moved into position across the area " to be spanned by a suitable technique. One example, the track elements are moved across by pushing a first track element part way across and then sliding a second track ~;,i element over the first. The track elements are relatively light in comparison with the bridge girders and therefore can be handled relatively easily by the type of crane available on vehicles for moving equipment and similar items. Once the track girder assembly is in place, the lifting gantries are ~ 10 positioned on top of the track girder assembly for rolling '~ movement along the top surface of the track elements.
The girder to be installed as indicated at 20 is then brought into position on the transport vehicle 19. The track elements are spaced by width sufficient to receive the rear transportation dolly 70 of the transport vehicle between the track elements so that the girder 20 is moved to a position between the cantilevered end 71 of the track assembly. The lifting gantries are then moved into position on top of the portion of ~he girder 20 and the outer one of the lifting gantries is connected to the girder while in a raised position or just below the fully raised position and then the lifting gantry is actuated to lift to the top of the raised position to lift -the girder away from the dolly 70. The dolly 70 can then be moved out of the area. The tractor unit of the transportation vehicle is then backed up pushing the lifting gantry 11 and the girder across the track girder l ~
assembly until the forward end of the girder 20 is positioned ~ ~.''' i`',l ':.
~ 9- 20~3~5~
between the ends 71 of the track elements. The lifting 3 gantry 12 is then operated to lift the forward end of the girder so that the girder is then wholly carried on the lifting gantries. The girder on the gantries are then moved again in a longitudinal direction to take up a position ;~ directly overlying the abutments as shown in Figure 1. In this posi~ion the lifting gantries can be lowered by retracting the cylinders 62 to lower the girder into position on the abutment. If necessary, if the amount of movement is greater than the stroke of the cylinder 62, it is possible to block up the girder at each end and then to restart the stroke by re-engaging the girder with longer cables.
;i~ In order to allow the girder to be lowered through the area between the track elements, it is necessary temporarily to release the braces 30, 31 and 32 and to pivot these to one side to allow the girder to pass therebetween.
The wide spacing between the track elements allows at least one second girder to be moved into place without shifting the !.dd track elements. The can be effected by the transverse movement of the lifting frame. Once the full extent available between the track elements has been utilized, it is necessary to move the track elements trasversely by the sliding platform 22.
Since various modifications can be made in my invention as hereinabove described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it is .,, . . ~ !, .,' :
~`.. '. :i: . . : : , - - 10 - 2~1~3~
intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
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Claims (9)
1. A method for installing a precast concrete bridge girder for the girder to extend from a first bridge abutment at one end to a second bridge abutment at a second end of the girder and to span an area to be bridged, the method comprising providing a track girder assembly, a first lifting gantry and a second lifting gantry, the track girder assembly forming an elongate guide track on which the lifting gantries can run longitudinally of the guide track, mounting the track girder assembly so as to span the area to be bridged, mounting the first and second gantries on the track girter assembly, transporting the bridge girder to a position with one end of the bridge girder adjacent one end of the track girder assembly such that a second end of the bridge girder is spaced from a second end of the track girder assembly and aligned therewith, attaching said one end of the bridge girder to the first lifting gantry to be carried thereby, moving the bridge girder longitudinally of the track girder assembly such that said one end is carried by the first lifting gantry while moving along the track girder assembly, attaching said second end of the bridge girder to the second lifting gantry, moving the first and second lifting gantries longitudinally of the track girder assembly while carrying the bridge girder to positions such that the first and second ends of the bridge girder are substantially aligned with the bridge abutments and simultaneously actuating the first and second lifting gantries to lower the bridge girder onto the first and second bridge abutments.
2. The method according to Claim 1 wherein the track girder assembly projects outwardly beyond one of the bridge abutments such that said one end thereof is spaced outwardly from the adjacent bridge abutment.
3. The method according to Claim 1 wherein the track girder assembly comprises two track elements arranged in a horizontal plane and spaced parallel position and wherein the bridge girder is transported on a road vehicle having a portion thereof movable between the track elements to locate the bridge girder between the track elements and beneath the first lifting gantry.
4. The method according to Claim 1 including adjusting the position of the bridge girder on the lifting gantry in a direction at right angles to the track girder assembly.
5. The method according to Claim 1 including resting each end of the track girder assembly on a respective support member including a slide member movable at right angles to the length of the track girder assembly for moving the track girder assembly transversely for installing further bridge girders.
6. The method according to Claim 1 wherein the track girder assembly includes a first and a second track element lying in a horizontal plane and in spaced parallel arrangement and transverse braces between the track elements and wherein, while the first lifting gantry is moved across the track girder assembly, the braces are engaged between the track elements and, while the bridge girder is lowered between the track elements to the bridge abutments, the braces are removed.
7. A apparatus for installing a precast concrete bridge girder for the girder to extend from a first bridge abutment at one end to a second bridge abutment at a second end and spanning an area to be bridged, the apparatus comprising a track girder assembly forming a elongate guide track for spanning between the first and second bridge abutments, a first lifting gantry and a second lifting gantry each for mounting on the track girder assembly for movement longitudinal thereof, each lifting gantry including means for supporting the bridge girder, ram means for lifting said support means vertically, and means mounting said track girder assembly for movement side to side in a direction generally at right angles to the length of the track girder assembly.
8. The apparatus according to Claim 7 wherein the track girder assembly includes a pair or track elements spaced by a width greater than eight feet and being free from transverse connecting elements at an end portion thereof to allow positioning of a road transport vehicle between the track elements.
9. The apparatus according to Claim 8 including bracing means connecting the track elements at a position spaced from said end portion, the bracing means being removable to allow lowering of the bridge girder between the track elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2083551 CA2083551A1 (en) | 1992-11-23 | 1992-11-23 | Installation system for bridge girders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2083551 CA2083551A1 (en) | 1992-11-23 | 1992-11-23 | Installation system for bridge girders |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2083551A1 true CA2083551A1 (en) | 1994-05-24 |
Family
ID=4150723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2083551 Abandoned CA2083551A1 (en) | 1992-11-23 | 1992-11-23 | Installation system for bridge girders |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2083551A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441779C (en) * | 2006-04-19 | 2008-12-10 | 中国建筑第二工程局有限公司 | Space-precasting translation-emplacing method for bridge construction |
| CN105442452A (en) * | 2015-11-13 | 2016-03-30 | 中铁大桥局集团第一工程有限公司 | Device and method for splicing double width bridge steel girder |
| CN110205934A (en) * | 2019-04-30 | 2019-09-06 | 中铁八局集团第二工程有限公司 | One kind is set a roof beam in place system for the mobile assembled of precast segmental beam Support Method joggle beam |
| CN110607736A (en) * | 2019-09-04 | 2019-12-24 | 成都天府轨谷科技有限公司 | Pile foundation rail plate girder structure and construction method |
| CN111472284A (en) * | 2020-04-30 | 2020-07-31 | 中建七局安装工程有限公司 | Assembling method for cantilever of prefabricated segmental beam portal crane of urban viaduct |
-
1992
- 1992-11-23 CA CA 2083551 patent/CA2083551A1/en not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441779C (en) * | 2006-04-19 | 2008-12-10 | 中国建筑第二工程局有限公司 | Space-precasting translation-emplacing method for bridge construction |
| CN105442452A (en) * | 2015-11-13 | 2016-03-30 | 中铁大桥局集团第一工程有限公司 | Device and method for splicing double width bridge steel girder |
| CN110205934A (en) * | 2019-04-30 | 2019-09-06 | 中铁八局集团第二工程有限公司 | One kind is set a roof beam in place system for the mobile assembled of precast segmental beam Support Method joggle beam |
| CN110607736A (en) * | 2019-09-04 | 2019-12-24 | 成都天府轨谷科技有限公司 | Pile foundation rail plate girder structure and construction method |
| CN111472284A (en) * | 2020-04-30 | 2020-07-31 | 中建七局安装工程有限公司 | Assembling method for cantilever of prefabricated segmental beam portal crane of urban viaduct |
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