CN107558378B - Bridge girder erection machine for erecting full precast girder and bridge girder erection method thereof - Google Patents
Bridge girder erection machine for erecting full precast girder and bridge girder erection method thereof Download PDFInfo
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- CN107558378B CN107558378B CN201710858907.5A CN201710858907A CN107558378B CN 107558378 B CN107558378 B CN 107558378B CN 201710858907 A CN201710858907 A CN 201710858907A CN 107558378 B CN107558378 B CN 107558378B
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Abstract
The invention discloses a bridge girder erection machine for erecting full precast girders and a bridge girder erection method thereof, comprising a machine arm which is symmetrically designed along the longitudinal direction and the transverse direction, wherein the machine arm is of a double-box girder structure, a front auxiliary supporting leg is arranged at the front end of the machine arm, a jacking supporting leg is arranged at the rear end of the machine arm, a front supporting leg and a rear supporting leg which can walk along the longitudinal direction are arranged in the middle of the machine arm, and a bearing supporting leg is arranged at the rear side of the rear supporting leg; the bridge girder erection method by using the bridge girder erection machine is very suitable for rapidly erecting overhead viaducts such as urban roads, urban light rails, subway lines and the like at places with complex construction conditions and high construction environment traffic pressure; the construction of the highway overhead, the urban light rail and the subway overhead bridge in China is promoted to develop towards the green, factory and standardized construction directions, and the economic and social benefits of the construction method are increasingly remarkable.
Description
Technical Field
The invention belongs to the technical field of prefabricated bridge construction, and particularly relates to a bridge girder erection machine for erecting full prefabricated girders and a bridge girder erection method thereof.
Background
With the acceleration of urban construction steps in China, in order to save land resources, overground overhead bridges such as urban roads, urban light rails and subway lines are increasing. Unlike the prior viaduct, the viaduct is mostly arranged around the city, has complex construction conditions and high traffic pressure in the construction environment, and brings higher requirements on the adaptability of the bridge girder erection machine.
The construction process of the road bridge girder erection machine commonly used at the present stage is mature and has wide application, but the defects of the road bridge girder erection machine are more obvious along with the development of working condition environments:
1. the existing bridge pier column and capping beam are generally installed by adopting the mode of on-site hoisting reinforcing steel bar binding, on-site installing a template and on-site pouring maintenance, the construction is greatly influenced by natural environment, the quality control is difficult, and the surrounding environment is seriously polluted.
2. The existing bridge girder erection machine cannot realize reverse construction generally, and can be realized only by auxiliary disassembly and assembly of a large-tonnage crane or even disassembly and assembly of a whole machine;
3. in the running process of the through holes of the existing bridge girder erection machine, a plurality of longitudinally moving steel rails are paved on the girder surface, so that the stress of the bridged girder is not good, and the construction efficiency is also influenced;
4. when the supporting legs of the existing bridge girder erection machine pass through holes, the supporting legs are driven by a wheel rail bridge deck or a hanging wheel type, and the former construction bridge deck in the two modes has large workload and low efficiency and influences the stress of the bridged bridge; the latter appears the landing leg many times in practical application's in-process and drops or walk to walk unsmoothly, and the loss that causes is very big.
Therefore, the bridge girder erection machine for highway overhead, urban light rail and subway viaduct is more and more urgent in demand.
Disclosure of Invention
The invention aims to solve the technical problems and provides a bridge girder erection machine for erecting full precast girders, which adopts the following technical scheme:
the bridge girder erection machine comprises a machine arm which is symmetrically designed along the longitudinal direction and the transverse direction, wherein the machine arm is of a double-box girder structure, a front auxiliary supporting leg is arranged at the front end of the machine arm, a jacking supporting leg is arranged at the rear end of the machine arm, a front supporting leg and a rear supporting leg which can walk along the longitudinal direction are arranged in the middle of the machine arm, a bearing supporting leg is arranged at the rear side of the rear supporting leg, wherein the front supporting leg, the rear supporting leg, the bearing supporting leg and the jacking supporting leg are used for supporting the machine arm on a bridge pier column or bridge piece, the front auxiliary supporting leg is used for supporting the front end of the machine arm on a bridge abutment, a front lifting trolley and a rear lifting trolley are arranged on the machine arm, the front lifting trolley and the rear lifting trolley are respectively provided with independent lifting mechanisms, walking mechanisms and rolling wheels are arranged at the bottoms of the front supporting leg and the rear supporting leg, and the bottoms of the front supporting leg and the rear supporting leg are provided with a transverse sliding rail used for transversely walking of the rolling wheels; and the front auxiliary supporting leg, the front supporting leg, the rear supporting leg, the bearing supporting leg and the jacking supporting leg are respectively provided with a jacking mechanism.
Preferably, the front auxiliary supporting leg sequentially comprises a connecting rod, a long supporting rod and a bottom supporting leg from top to bottom, wherein the connecting rod is detachably connected to the front end of the horn, the lower end of the connecting rod is detachably connected with the top end of the long supporting rod, the lower end of the long supporting rod is detachably connected with the bottom supporting leg, and the jacking mechanism is arranged on the bottom supporting leg; the front lifting trolley is provided with a rotating mechanism, and the rotating mechanism drives the lifting mechanism of the front lifting trolley to rotate in a horizontal plane.
Preferably, the front support leg, the rear support leg, the bearing support leg and the jacking support leg are respectively provided with a left upright post and a right upright post so as to transport bridge pieces, bridge piers or capping beams from the middle.
A construction method for a full prefabricated bridge by using the bridge girder erection machine comprises the steps of setting a Pn bridge pier column and a Pn+1 bridge pier column along a construction direction, erecting all Pn bridge sheets to form a Pn bridge deck, and then using the bridge girder erection machine to carry out the following steps:
a: firstly, erecting a Pn+3 bridge pier column on one side, and then erecting a Pn+3 bridge pier column on the other side;
b: installing a Pn+1 bridge piece between the Pn+1 bridge pier column and the Pn+2 bridge pier column during the grouting equal strength of the Pn+3 bridge pier column;
c: after all Pn+1 bridge sheets are erected to form a Pn+1 bridge deck, erecting a Pn+3 cap beam between two Pn+3 bridge pier columns;
d: after the grouting strength of the equal Pn+3 cap beam meets the requirement, the bridge girder erection machine passes through the holes so as to perform construction of the Pn+4 bridge pier column;
e: and D, repeating the steps A to D until the last bridge piece is installed.
Preferably, the step a includes the steps of:
a1: the front auxiliary supporting leg of the bridge girder erection machine stands on a bracket beside the Pn+3 bridge pier, the front supporting leg stands on a track of the Pn+2 capping beam on the Pn+2 bridge pier column, and the rear supporting leg and the bearing supporting leg stand on the Pn bridge deck;
a2: the Pn+3 bridge pier columns are fed from the rear end of the bridge girder erection machine by the front girder transporting vehicle and the rear girder transporting vehicle;
a3: the front lifting trolley lifts the front end of the Pn+3 bridge pier column, and then the beam transporting trolley moves forwards together, when the rear beam transporting trolley approaches to the front transporting Liang Cheshi, the rear lifting trolley lifts the rear end of the Pn+3 bridge pier column, and the front lifting trolley and the rear lifting trolley transport the Pn+3 bridge pier column to a proper position of the Pn+3 bridge pier column;
a4: the front lifting trolley is kept motionless, the rear lifting trolley is gradually close to the front lifting trolley and simultaneously the rear end of the Pn+3 bridge pier column below the rear lifting trolley until the Pn+3 bridge pier column is in a vertical state;
a5: the rear lifting trolley is separated from the Pn+3 bridge pier column, and the front lifting trolley independently lifts the Pn+3 bridge pier column and installs the Pn+3 bridge pier column at a corresponding position to finish the construction of the Pn+3 bridge pier column at one side;
a6: and (3) transversely moving the bridge girder erection machine, and repeating the steps A1 to A5 to finish the construction of the Pn+3 bridge pier column on the other side.
Preferably, the step B includes the steps of:
b1: the front lifting trolley and the rear lifting trolley take the Pn+1 bridge piece from the girder transporting trolley and transport the Pn+1 bridge piece to the position between the Pn+1 bridge pier column and the Pn+2 bridge pier column for erection and installation;
b2: and (3) transversely moving the bridge girder erection machine, and repeating the step (B1) until all Pn+1 bridge girder segments are erected and installed to form the Pn+1 bridge deck.
Preferably, the step C includes the steps of:
c1: the beam transporting vehicle transports the Pn+3 cap beam from the bridge deck at the rear end of the bridge girder erection machine to a region where the front hoisting trolley can hoist;
c2: and lifting the Pn+3 cap beam by using the front lifting trolley, conveying the cap beam between the Pn+3 pier columns, and then rotating the Pn+3 cap beam to transversely mount the cap beam on the two Pn+3 pier columns.
Preferably, the step D includes the steps of:
d1: the bridge girder erection machine transversely moves to the center of a line, a front auxiliary supporting leg stands on a bracket of a Pn+3 bridge pier base, the front auxiliary supporting leg, the front supporting leg and a supporting leg support a machine arm, a front lifting trolley is used for lifting a rear supporting leg to a Pn+1 bridge deck behind the front supporting leg and supporting the machine arm, and then the front lifting trolley is used for lifting the front supporting leg to a track of a Pn+3 bent cap;
d2: the front lifting trolley and the rear lifting trolley are retracted to the position above the rear supporting leg, the front auxiliary supporting leg and the lifting supporting leg arm are retracted to advance for a certain distance, when the lifting supporting leg approaches to the supporting leg, the lifting supporting leg supports the arm, and the rear lifting trolley lifts the supporting leg to the position behind the rear supporting leg;
d3: the front lifting trolley and the rear lifting trolley travel to the upper part of the rear supporting leg, the front auxiliary supporting leg and the lifting supporting leg arm are retracted to continuously advance for a distance gradually so that the front auxiliary supporting leg reaches the bracket of the Pn+4th pier base, and meanwhile, the front lifting trolley and the rear lifting trolley synchronously retract to be kept above the rear supporting leg.
Preferably, the front auxiliary supporting leg sequentially comprises a connecting rod, a long supporting rod and a bottom supporting leg from top to bottom, the connecting rod is detachably connected to the front end of the horn, the lower end of the connecting rod is detachably connected to the top end of the long supporting rod, the lower end of the long supporting rod is detachably connected to the bottom supporting leg, and the jacking mechanism is arranged on the bottom supporting leg.
Preferably, step E may be further followed by step F, which includes the steps of:
f1: the long supporting rod is detached from the connecting rod and the bottom supporting leg, then the bottom supporting leg is detachably arranged on the connecting rod to form a transition supporting leg, and the transition supporting leg stands on the bridge floor of the end section or stands on the ground connected with the bridge floor of the end section;
f2: the front supporting leg and the rear supporting leg are transported forwards by utilizing the front lifting trolley and the rear lifting trolley;
f3: the transition support leg and the jacking support leg are installed at the exchange positions by utilizing the front lifting trolley and the rear lifting trolley;
f4: the front supporting leg is arranged beside the bearing supporting leg by utilizing the front lifting trolley and the rear lifting trolley;
and F5: the front lifting trolley and the rear lifting trolley are utilized to install the bearing support legs in front of the rear support legs;
f6: the front lifting trolley and the rear lifting trolley are installed in a exchanged manner by means of a crane;
f7: the bottom supporting leg is detached from the connecting rod, and the upper end and the lower end of the long supporting rod are respectively connected with the connecting rod and the bottom supporting leg to form a front auxiliary supporting leg;
f8: and the electric hydraulic connection is adjusted, so that the bridge construction in the opposite direction is realized.
Compared with the prior art, the invention has the following beneficial effects:
(1) The construction method not only can finish erection and installation of the whole hole, but also can finish erection and installation of a prefabricated bridge pier column and a bent cap front span in one-stop mode, and is an economical and quick construction mode;
(2) When the construction method is used for carrying out the hole passing step, a longitudinally moving steel rail is not required to be paved on the bridge deck, self-service hole passing can be realized through the mutual matching of the front lifting trolley, the rear lifting trolley, the front supporting leg, the rear supporting leg, the bearing supporting leg and the jacking supporting leg, the construction efficiency is greatly improved, and the construction time is shortened;
(3) Meanwhile, when passing through the hole, the front lifting trolley and the rear lifting trolley which are self-carried by the bridge girder erection machine are utilized for back-off transportation, so that the safety coefficient is high, and the occurrence of accidents is greatly reduced;
(4) According to the construction method, under the condition that large-tonnage crane assistance is not available, the general crane is matched with the front lifting trolley, the rear lifting trolley, the front supporting leg, the rear supporting leg, the bearing supporting leg and the jacking supporting leg, so that the action adjustment of reverse construction can be rapidly completed in a small construction site;
(5) The full-bridge structure, such as a bridge pier column, a capping beam, a bridge piece and the like, is prefabricated in advance in a factory, and can be erected and installed only by being transported to the site; the requirements of construction on site environment are reduced, the production efficiency is high, the quality control of prefabricated products is good, the quality of the bridge is high, and the overall engineering cost is low;
(6) The construction method is very suitable for quick erection of overhead viaducts such as urban roads, urban light rails, subway lines and the like at places with high traffic pressure in construction environments and surrounding cities under complex construction conditions; the construction of the highway overhead, the urban light rail and the subway overhead bridge in China is promoted to develop towards the green, factory and standardized construction directions, and the economic and social benefits of the construction method are increasingly remarkable.
Drawings
FIG. 1 is a schematic structural view of a bridge girder erection machine;
FIG. 2 is a schematic diagram of step A;
FIG. 3 is a schematic diagram of step B;
FIG. 4 is one of the schematic diagrams of step C;
FIG. 5 is a second schematic diagram of step C;
FIG. 6 is one of the schematic diagrams of step D;
FIG. 7 is a second schematic diagram of step D;
FIG. 8 is one of the schematic diagrams of step F;
FIG. 9 is a second diagram of step F.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the bridge girder erection machine comprises a horn 3 which is symmetrically designed along the longitudinal direction and the transverse direction, wherein the horn 3 is of a double-box girder structure, a front auxiliary supporting leg 8 is arranged at the front end of the horn 3, the front auxiliary supporting leg 8 sequentially comprises a connecting rod 20, a long supporting rod 22 and a bottom supporting leg 21 from top to bottom, the connecting rod 20 is detachably connected at the front end of the horn 3, the lower end of the connecting rod 20 is detachably connected with the top end of the long supporting rod 22, the lower end of the long supporting rod 22 is detachably connected with the bottom supporting leg 21, a jacking mechanism is arranged on the bottom supporting leg 21, a jacking supporting leg 4 is arranged at the rear end of the horn 3, a front supporting leg 7 and a rear supporting leg 6 which can travel along the longitudinal direction, namely the construction direction are arranged in the middle of the horn 3, a bearing supporting leg 5 is arranged at the rear side of the rear supporting leg 6, wherein the front supporting leg 7, the rear supporting leg 6, the bearing supporting leg 5 and the jacking supporting leg 4 are used for supporting the horn 3 on a bridge column or a bridge piece, the front end of the horn 3 is used for supporting the front end of the horn 3 on a bridge floor, a front lifting trolley 2 and a rear lifting trolley 1 are arranged on the horn 3, a front lifting trolley 1 and a rear trolley 1 are arranged in a rotating mechanism and a front trolley 2 and a front lifting mechanism 2 are arranged in a rotating mechanism and a horizontal plane respectively; the bottoms of the front supporting leg 7 and the rear supporting leg 6 are respectively provided with a transverse moving roller, the bottoms of the front supporting leg 7 and the rear supporting leg 6 are respectively provided with a transverse moving rail for transverse moving of the rollers, and the front supporting leg 7, the rear supporting leg 6, the bearing supporting leg 5 and the jacking supporting leg 4 are respectively provided with a left upright post, a right upright post and a cross beam so as to transport bridge pieces, bridge pier columns or bent caps from the middle; the front auxiliary supporting leg 8, the front supporting leg 7, the rear supporting leg 6, the bearing supporting leg 5 and the jacking supporting leg 4 are respectively provided with a jacking mechanism.
In order to facilitate description of the construction method of the full prefabricated bridge, all Pn bridge pieces are erected between the Pn bridge pier column 13 and the Pn+1 bridge pier column 14 along the construction direction to form the Pn bridge deck 10, and then the following steps are performed by using the bridge girder erection machine:
a: firstly, erecting a Pn+3 bridge pier column on one side, and then erecting a Pn+3 bridge pier column on the other side;
b: installing a Pn+1 bridge piece between the Pn+1 bridge pier column 14 and the Pn+2 bridge pier column 15 during the grouting equal strength of the Pn+3 bridge pier column;
c: after all Pn+1 bridge pieces are erected to form a Pn+1 bridge deck 16, erecting a Pn+3 cap beam between two Pn+3 bridge pier columns;
d: after the grouting strength of the Pn+3 cap beam reaches the requirement, the bridge girder erection machine passes through the hole, and the construction of the Pn+4 bridge pier column is carried out;
e: and D, repeating the steps A to D until the last bridge piece is installed.
After step E is completed, step F may also be performed: and performing reverse construction.
As shown in fig. 2, the step a specifically includes the following steps:
a1: the front auxiliary supporting leg 8 of the bridge girder erection machine stands on a bracket beside the Pn+3 bridge pier base, the front supporting leg 7 stands on the Pn+2 bridge pier column 15 and on the track of the Pn+2 cap beam 16, and the rear supporting leg 6 and the supporting leg 5 stand on the Pn joint bridge deck 10;
a2: the front beam transporting vehicle 9 and the rear beam transporting vehicle 12 feed the Pn+3 bridge pier 11 from the rear end of the bridge girder erection machine;
a3: the front lifting trolley 2 lifts the front end of the Pn+3 bridge pier column 11, and then the beam transporting trolley 9 moves forwards together, when the rear beam transporting trolley 9 approaches the front beam transporting trolley 12, the rear lifting trolley 1 lifts the rear end of the Pn+3 bridge pier column 11, and the front lifting trolley 2 and the rear lifting trolley 1 transport the Pn+3 bridge pier column 11 to a proper position of the Pn+3 bridge pier column installation position;
a4: the front lifting trolley 2 is kept motionless, the rear lifting trolley 1 gradually approaches the front lifting trolley 2 and simultaneously the rear end of the Pn+3 bridge pier 11 below until the Pn+3 bridge pier 11 is in a vertical state;
a5: the rear lifting trolley 1 is separated from the Pn+3 bridge pier column 11, the front lifting trolley 2 independently lifts the Pn+3 bridge pier column 11 and installs the Pn+3 bridge pier column 11 at a corresponding position, and the construction of the Pn+3 bridge pier column 11 at one side is completed;
a6: and (3) transversely moving the bridge girder erection machine, and repeating the steps A1 to A5 to finish the construction of the Pn+3 bridge pier column 11 on the other side.
As shown in fig. 3, the step B includes the steps of:
b1: the front lifting trolley 2 and the rear lifting trolley 1 take the Pn+1 bridge piece from the girder transporting trolley and transport the Pn+1 bridge piece between the Pn+1 bridge pier column 14 and the Pn+2 bridge pier column 15 for erection and installation;
b2: and (3) transversely moving the bridge girder erection machine, and repeating the step (B1) until all Pn+1 bridge girder segments are erected and installed to form the Pn+1 bridge deck 17.
As shown in fig. 4 and 5, the step C includes the following steps:
c1: the beam transporting vehicle transports the Pn+3 cap beam 18 from the bridge deck at the rear end of the bridge girder erection machine to a region which can be lifted by the front lifting trolley 2;
c2: the pnth+3 cap beam 18 is lifted by the front lifting trolley 2 and is transported between the two pnth+ 3 pier columns, and then the pnth+3 cap beam 18 is rotated and is transversely mounted on the two pnth+ 3 pier columns 11.
As shown in fig. 6, the step D shown in fig. 7 includes the following steps:
d1: the bridge girder erection machine transversely moves to the center of a line, a front auxiliary supporting leg 8 stands on a bracket of a Pn+3 bridge pier base, a front auxiliary supporting leg 8, a front supporting leg 7 and a bearing supporting leg 5 support a horn 3, a front lifting trolley 2 is used for lifting a rear supporting leg 6 to a Pn+1 bridge deck 16 behind the front supporting leg 7 and supporting the horn 3, and then the front lifting trolley 2 is used for lifting the front supporting leg 7 to a track of a Pn+3 cap beam;
d2: the front lifting trolley and the rear lifting trolley are retracted to be above the rear supporting leg 6, the front auxiliary supporting leg 8 and the lifting supporting leg 4 are retracted to advance for a certain distance, when the lifting supporting leg 4 approaches the supporting leg 5, the lifting supporting leg 4 supports the lifting arm 3, and the rear lifting trolley 1 lifts the supporting leg 5 to the rear of the rear supporting leg 6;
d3: the front lifting trolley 2 and the rear lifting trolley 1 walk above the rear supporting leg 6, the front auxiliary supporting leg 8 and the jacking supporting leg 4 are retracted, the machine 3 continues to advance for a distance gradually so that the front auxiliary supporting leg 8 reaches the bracket of the Pn+4th pier base, and meanwhile, the front lifting trolley 2 and the rear lifting trolley 1 synchronously retract and remain above the rear supporting leg.
As shown in fig. 8 and 9, the step F includes the steps of:
f1: the long support rod 22 is detached from the connecting rod 20 and the bottom support leg 21, and then the bottom support leg 21 is detachably arranged on the connecting rod 20 to form a transition support leg which stands on the bridge floor of the end section or on the ground connected with the bridge floor of the end section;
f2: the front supporting leg 7 and the rear supporting leg 6 are transported forwards by utilizing the front lifting trolley 2 and the rear lifting trolley 1;
f3: the transition support leg and the jacking support leg 4 are installed at the exchange positions by utilizing the front lifting trolley 2 and the rear lifting trolley 1;
f4: the front lifting trolley 2 and the rear lifting trolley 1 are utilized to install the front supporting leg 7 beside the supporting leg 5;
and F5: the front lifting trolley 2 and the rear lifting trolley 1 are utilized to install the bearing support legs 5 in front of the rear support legs 6;
f6: the front lifting trolley 2 and the rear lifting trolley 1 are installed in a exchanged manner by means of a crane;
f7: the bottom supporting leg 21 is detached from the connecting rod 20, and the upper end and the lower end of the long supporting rod 22 are respectively connected with the connecting rod 20 and the bottom supporting leg 21 to form a front auxiliary supporting leg;
f8: and the electric hydraulic connection is adjusted, so that the bridge construction in the opposite direction is realized.
Compared with the prior art, the invention has the following beneficial effects:
(1) The construction method not only can finish erection and installation of the whole hole, but also can finish erection and installation of a prefabricated bridge pier column and a bent cap front span in one-stop mode, and is an economical and quick construction mode;
(2) When the construction method is used for carrying out the hole passing step, a longitudinally moving steel rail is not required to be paved on the bridge deck, self-service hole passing can be realized through the mutual matching of the front lifting trolley, the rear lifting trolley, the front supporting leg, the rear supporting leg, the bearing supporting leg and the jacking supporting leg, the construction efficiency is greatly improved, and the construction time is shortened;
(3) Meanwhile, when passing through the hole, the front lifting trolley and the rear lifting trolley which are self-carried by the bridge girder erection machine are utilized for back-off transportation, so that the safety coefficient is high, and the occurrence of accidents is greatly reduced;
(4) According to the construction method, under the condition that large-tonnage crane assistance is not available, the general crane is matched with the front lifting trolley, the rear lifting trolley, the front supporting leg, the rear supporting leg, the bearing supporting leg and the jacking supporting leg, so that the action adjustment of reverse construction can be rapidly completed in a small construction site;
(5) The full-bridge structure, such as a bridge pier column, a capping beam, a bridge piece and the like, is prefabricated in advance in a factory, and can be erected and installed only by being transported to the site; the requirements of construction on site environment are reduced, the production efficiency is high, the quality control of prefabricated products is good, the quality of the bridge is high, and the overall engineering cost is low;
(6) The construction method is very suitable for quick erection of overhead viaducts such as urban roads, urban light rails, subway lines and the like at places with high traffic pressure in construction environments and surrounding cities under complex construction conditions; the construction of the highway overhead, the urban light rail and the subway overhead bridge in China is promoted to develop towards the green, factory and standardized construction directions, and the economic and social benefits of the construction method are increasingly remarkable.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The bridge girder erection machine for erecting the full precast girder comprises a machine arm which is symmetrically designed along the longitudinal direction and the transverse direction, and the machine arm is of a double-box girder structure, and is characterized in that a front auxiliary supporting leg is arranged at the front end of the machine arm, a jacking supporting leg is arranged at the rear end of the machine arm, a front supporting leg and a rear supporting leg which can walk along the longitudinal direction are arranged in the middle of the machine arm, a bearing supporting leg is arranged at the rear side of the rear supporting leg, wherein the front supporting leg, the rear supporting leg, the bearing supporting leg and the jacking supporting leg are used for supporting the machine arm on a bridge pier column or a bridge piece, the front auxiliary supporting leg is used for supporting the front end of the machine arm on a bridge foundation, a front lifting trolley and a rear lifting trolley are arranged on the machine arm, a lifting mechanism, a travelling mechanism and a traversing mechanism which are independent of each other are arranged on the front lifting trolley and the rear lifting trolley, traversing rollers are arranged at the bottoms of the front supporting leg and the rear supporting leg, and tracks for traversing the rollers are arranged at the bottoms of the front supporting leg and the rear supporting leg; and the front auxiliary supporting leg, the front supporting leg, the rear supporting leg, the bearing supporting leg and the jacking supporting leg are respectively provided with a jacking mechanism.
2. The bridge girder erection machine for erecting full precast girders according to claim 1, wherein the front auxiliary supporting leg comprises a connecting rod, a long supporting rod and a bottom supporting leg from top to bottom in sequence, the connecting rod is detachably connected to the front end of the horn, the lower end of the connecting rod is detachably connected to the top end of the long supporting rod, the lower end of the long supporting rod is detachably connected to the bottom supporting leg, and the jacking mechanism is arranged on the bottom supporting leg; the front lifting trolley is provided with a rotating mechanism, and the rotating mechanism drives the lifting mechanism of the front lifting trolley to rotate in a horizontal plane.
3. A bridge girder erection machine for erecting full precast girders according to claim 1 or 2, wherein the front, rear, bearing and elevating legs are provided with respective left and right uprights for transporting bridge slabs, bridge pier or bent caps from the middle.
4. A construction method for a full prefabricated bridge using the bridge girder erection machine according to any one of claims 1 to 3, wherein all pnth bridge slabs are erected between the pnth bridge pier column and the pn+1 th bridge pier column along the construction direction to form a pnth bridge deck, and then the following steps are performed using the bridge girder erection machine:
a: firstly, erecting a Pn+3 bridge pier column on one side, and then erecting a Pn+3 bridge pier column on the other side;
b: installing a Pn+1 bridge piece between the Pn+1 bridge pier column and the Pn+2 bridge pier column during the grouting equal strength of the Pn+3 bridge pier column;
c: after all Pn+1 bridge sheets are erected to form a Pn+1 bridge deck, erecting a Pn+3 cap beam between two Pn+3 bridge pier columns;
d: after the grouting strength of the equal Pn+3 cap beam meets the requirement, the bridge girder erection machine passes through the holes so as to perform construction of the Pn+4 bridge pier column;
e: repeating the steps A to D until the last bridge piece is installed;
the step A comprises the following steps:
a1: the front auxiliary supporting leg of the bridge girder erection machine stands on a bracket beside the Pn+3 bridge pier, the front supporting leg stands on a track of the Pn+2 capping beam on the Pn+2 bridge pier column, and the rear supporting leg and the bearing supporting leg stand on the Pn bridge deck;
a2: the Pn+3 bridge pier columns are fed from the rear end of the bridge girder erection machine by the front girder transporting vehicle and the rear girder transporting vehicle;
a3: the front lifting trolley lifts the front end of the Pn+3 bridge pier column, and then the beam transporting trolley moves forwards together, when the rear beam transporting trolley approaches to the front transporting Liang Cheshi, the rear lifting trolley lifts the rear end of the Pn+3 bridge pier column, and the front lifting trolley and the rear lifting trolley transport the Pn+3 bridge pier column to a proper position of the Pn+3 bridge pier column;
a4: the front lifting trolley is kept motionless, the rear lifting trolley is gradually close to the front lifting trolley and simultaneously the rear end of the Pn+3 bridge pier column below the rear lifting trolley until the Pn+3 bridge pier column is in a vertical state;
a5: the rear lifting trolley is separated from the Pn+3 bridge pier column, and the front lifting trolley independently lifts the Pn+3 bridge pier column and installs the Pn+3 bridge pier column at a corresponding position to finish the construction of the Pn+3 bridge pier column at one side;
a6: and (3) transversely moving the bridge girder erection machine, and repeating the steps A1 to A5 to finish the construction of the Pn+3 bridge pier column on the other side;
the step B comprises the following steps:
b1: the front lifting trolley and the rear lifting trolley take the Pn+1 bridge piece from the girder transporting trolley and transport the Pn+1 bridge piece to the position between the Pn+1 bridge pier column and the Pn+2 bridge pier column for erection and installation;
b2: transversely moving the bridge girder erection machine, and repeating the step B1 until all Pn+1 bridge sheets are erected and installed to form Pn+1 bridge decks;
the step C comprises the following steps:
c1: the beam transporting vehicle transports the Pn+3 cap beam from the bridge deck at the rear end of the bridge girder erection machine to a region where the front hoisting trolley can hoist;
c2: lifting the Pn+3 cap beam by using a front lifting trolley, conveying the Pn+3 cap beam between the Pn+3 pier columns, and then rotating the Pn+3 cap beam to transversely mount the Pn+3 cap beam on the two Pn+3 pier columns;
the step D comprises the following steps:
d1: the bridge girder erection machine transversely moves to the center of a line, a front auxiliary supporting leg stands on a bracket of a Pn+3 bridge pier base, the front auxiliary supporting leg, the front supporting leg and a supporting leg support a machine arm, a front lifting trolley is used for lifting a rear supporting leg to a Pn+1 bridge deck behind the front supporting leg and supporting the machine arm, and then the front lifting trolley is used for lifting the front supporting leg to a track of a Pn+3 bent cap;
d2: the front lifting trolley and the rear lifting trolley are retracted to the position above the rear supporting leg, the front auxiliary supporting leg and the lifting supporting leg arm are retracted to advance for a certain distance, when the lifting supporting leg approaches to the supporting leg, the lifting supporting leg supports the arm, and the rear lifting trolley lifts the supporting leg to the position behind the rear supporting leg;
d3: the front lifting trolley and the rear lifting trolley travel to the upper part of the rear supporting leg, the front auxiliary supporting leg and the lifting supporting leg arm are retracted to continuously advance for a distance gradually so that the front auxiliary supporting leg reaches the bracket of the Pn+4th pier base, and meanwhile, the front lifting trolley and the rear lifting trolley synchronously retract to be kept above the rear supporting leg.
5. The construction method of the full prefabricated bridge according to claim 4, wherein the front auxiliary supporting leg sequentially comprises a connecting rod, a long supporting rod and a bottom supporting leg from top to bottom, the connecting rod is detachably connected to the front end of the horn, the lower end of the connecting rod is detachably connected to the top end of the long supporting rod, the lower end of the long supporting rod is detachably connected to the bottom supporting leg, and the jacking mechanism is arranged on the bottom supporting leg.
6. The method of constructing a fully prefabricated bridge according to claim 5, wherein step F is performed after step E, said step F comprising the steps of:
f1: the long supporting rod is detached from the connecting rod and the bottom supporting leg, then the bottom supporting leg is detachably arranged on the connecting rod to form a transition supporting leg, and the transition supporting leg stands on the bridge floor of the end section or stands on the ground connected with the bridge floor of the end section;
f2: the front supporting leg and the rear supporting leg are transported forwards by utilizing the front lifting trolley and the rear lifting trolley;
f3: the transition support leg and the jacking support leg are installed at the exchange positions by utilizing the front lifting trolley and the rear lifting trolley;
f4: the front supporting leg is arranged beside the bearing supporting leg by utilizing the front lifting trolley and the rear lifting trolley;
and F5: the front lifting trolley and the rear lifting trolley are utilized to install the bearing support legs in front of the rear support legs;
f6: the front lifting trolley and the rear lifting trolley are installed in a exchanged manner by means of a crane;
f7: the bottom supporting leg is detached from the connecting rod, and the upper end and the lower end of the long supporting rod are respectively connected with the connecting rod and the bottom supporting leg to form a front auxiliary supporting leg;
f8: and the electric hydraulic connection is adjusted, so that the bridge construction in the opposite direction is realized.
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| CN109024291A (en) * | 2018-08-06 | 2018-12-18 | 江苏恩纳斯重工机械有限公司 | A kind of integration Bridge Erector and its working method |
| CN110093863A (en) * | 2019-05-31 | 2019-08-06 | 浙江省交通规划设计研究院有限公司 | A kind of double face integration Bridge Erector being not provided with front leg strut |
| CN110748163A (en) * | 2019-11-15 | 2020-02-04 | 河南省中冶起重机有限公司 | Novel bridge girder erection machine |
| CN113136810A (en) * | 2021-05-26 | 2021-07-20 | 中交第二航务工程局有限公司 | Bridge girder erection machine for integral erection construction of superstructure of long-span bridge and construction method |
| CN113373814B (en) * | 2021-06-11 | 2022-09-20 | 中铁工程机械研究设计院有限公司 | Highway bridge erecting method |
| CN114250711B (en) * | 2021-12-31 | 2024-06-04 | 史托克(天津)工程技术有限公司 | Highway bridge girder erection machine and hole passing method |
| CN114438901A (en) * | 2022-03-22 | 2022-05-06 | 四川发展磁浮科技有限公司 | Construction method for built-in magnetic suspension elevated line bridge girder erection machine |
| CN114808736B (en) * | 2022-05-20 | 2024-04-12 | 中昕重工(宁波)有限公司 | Bridge prefabricated part inner-span transverse horizontal rotation hoisting device and hoisting process method |
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| CN105735142A (en) * | 2016-05-06 | 2016-07-06 | 郑州新大方重工科技有限公司 | Bridge girder erection machine for prestressed concrete bridge precast section span-by-span splicing construction |
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