CN111139742A - Method for mounting and dismounting highway bridge girder erection machine - Google Patents
Method for mounting and dismounting highway bridge girder erection machine Download PDFInfo
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- CN111139742A CN111139742A CN201911367390.5A CN201911367390A CN111139742A CN 111139742 A CN111139742 A CN 111139742A CN 201911367390 A CN201911367390 A CN 201911367390A CN 111139742 A CN111139742 A CN 111139742A
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- girder erection
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- 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
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Abstract
The invention provides a method for installing and disassembling a highway bridge girder erection machine, belonging to the technical field of highway bridge engineering, wherein the method for installing the highway bridge girder erection machine comprises the steps of installing front supporting legs on piers; installing a middle support and a rear support on the paved precast beam surface, wherein the middle support is positioned between the rear support and the front supporting leg; assembling a plurality of intermediate section beams into an intermediate beam; hoisting the middle beam to the middle support and the rear support, wherein the middle support is fixed with the front end part of the middle beam, and the rear support is fixed with the rear end part of the middle beam; simultaneously mounting end section beams at two ends of the middle beam until a main beam is formed; fixing the front support leg to the front end of the main beam; and an accessory component is arranged on the main beam. The method for installing and disassembling the highway bridge girder erection machine simplifies the construction process, shortens the operation time, improves the construction efficiency and ensures the safety of operators.
Description
Technical Field
The invention belongs to the technical field of highway bridge engineering, and particularly relates to a method for mounting and dismounting a highway bridge girder erection machine.
Background
The bridge girder erection machine is common equipment in highway and bridge construction, belongs to the crane category, and the highway and bridge construction can greatly reduce the labor intensity of workers, shorten the construction time and ensure the efficient completion of engineering operation by the bridge girder erection machine.
The bridge girder erection machine is required to be assembled on a road section needing to be built before use, the existing bridge girder erection machine is installed on a main girder in sequence when being installed, the installation method only has a working face in one direction when in operation, the outermost side has a large rotating radius, the operation space is limited, the installation difficulty is increased, and safety accidents are easily caused.
Disclosure of Invention
The invention aims to provide a method for installing and disassembling a highway bridge girder erection machine, and aims to solve the technical problems of increased installation difficulty and low safety caused by the fact that main girders are installed sequentially when the existing bridge girder erection machine is installed.
In order to achieve the purpose, the invention adopts the technical scheme that: the method for installing the highway bridge erecting machine comprises the following steps:
mounting front support legs on the bridge piers;
installing a middle support and a rear support on the paved precast beam surface, wherein the middle support is positioned between the rear support and the front supporting leg;
assembling a plurality of intermediate section beams into an intermediate beam;
hoisting the middle beam to the middle support and the rear support, wherein the middle support is fixed with the front end part of the middle beam, and the rear support is fixed with the rear end part of the middle beam;
simultaneously mounting end section beams at two ends of the middle beam until a main beam is formed;
fixing the front support leg to the front end of the main beam;
and an accessory component is arranged on the main beam.
As another embodiment of the present application, the mounting of the auxiliary component on the main beam specifically includes:
and a guide beam, a lifting mechanism, electrical equipment and a lifting appliance are arranged on the main beam.
As another embodiment of this application, the installation front leg on pier specifically includes:
paving a front support transverse moving track on the bridge pier, wherein the distance between supporting points at two ends of the front support transverse moving track is not more than 1 m;
assembling the front support leg, and hoisting the front support leg to the front support cross sliding rail through a crane.
As another embodiment of the present application, the assembling a plurality of middle section beams into a middle beam specifically includes:
numbering the middle section beams according to the placing positions of the middle section beams;
assembling a plurality of the middle section beams with corresponding labels to form the middle beam.
As another embodiment of this application, with the centre sill handling to in hold in the palm with the back holds in the palm on, specifically include:
hoisting the middle beam to the middle support and the rear support through two groups of cranes respectively arranged at two ends of the middle beam;
the installation of the segmental beam is simultaneously carried out at two ends of the middle beam until a main beam is formed, and the method specifically comprises the following steps:
numbering the end section beams according to the placing positions of the end section beams;
the crane positions at both ends of the intermediate beam are unchanged, and the end section beams are installed at both ends of the intermediate beam one by one;
when one of the end section beams is completely installed, the corresponding crane position moves to the free end of the end section beam, and after the crane position is moved to the designated position, the installation of the next end section beam is carried out until the main beam is formed.
As another embodiment of this application, still include after forming the girder:
mounting rear support legs on the precast beam surface;
the rear legs are fixed to the rear end of the main beam.
As another embodiment of this application, hoist mechanism includes lifting trolley and sideslip dolly, install hoist mechanism on the girder specifically includes:
assembling the longitudinally-moving wheel box and the carrying pole beam into the lifting trolley;
placing the lifting trolley on a track of the main beam by using a crane, and enabling the longitudinally-moving wheel box to be in rolling fit with the main beam;
placing the traverse trolley on a traverse rail of the lifting trolley;
and hoisting the winch to the trolley body of the transverse moving trolley, and installing a weather shed for covering the winch.
The method for installing the highway bridge girder erection machine has the beneficial effects that: compared with the prior art, the method for installing the highway bridge girder erection machine comprises the steps of sequentially installing the front support legs, the middle support and the rear support, installing the main girder, assembling the middle girder, then hanging the middle girder on the installed middle support and the rear support, simultaneously installing the end section girders at two ends of the middle girder, finally completing the installation of the main girder, and then installing other accessory components. According to the method for installing the highway bridge girder erection machine, the middle beam is assembled firstly when the main beam is installed, so that a crane can conveniently hoist the head end and the tail end of the middle beam, two working faces are provided when the subsequent end section beam is assembled, the operation space is large, the accurate alignment is convenient, the end section beams at the two ends can be simultaneously assembled, the adjustment is relatively convenient, the installation flexibility is improved, the installation difficulty is reduced, the assembling time is shortened, the construction efficiency is improved, and the safety factor is also improved.
The invention also provides a method for disassembling the highway bridge girder erection machine, which is used for disassembling the highway bridge girder erection machine and is characterized by comprising the following steps:
detaching the auxiliary components on the main beam;
removing the connection relation between the front supporting legs and the main beam;
disassembling the end section beam;
removing the connection relation between the middle beam and the middle support and the rear support, and lifting the middle beam away;
removing the middle support and the rear support;
and removing the front supporting leg.
As another embodiment of the present application, before detaching the end-segment beam, further comprises:
and sealing the middle beam.
As another embodiment of the present application, after the intermediate beam is lifted away, the method further includes:
and hoisting the middle beams to the ground, and dismantling the middle section beams one by one.
The method for disassembling the highway bridge girder erection machine has the beneficial effects that: compared with the prior art, the dismounting method of the highway bridge girder erection machine firstly dismantles the accessory parts and removes the connection relation between the front supporting legs and the main girder, then the end section girder is dismounted, then the connection relation between the middle girder and the middle support and the rear support is removed, and then other parts are dismounted after being lifted off. According to the disassembling method of the highway bridge girder erection machine, two ends can be simultaneously disassembled when the end section girder is disassembled, two working faces are provided, the disassembling time of the bridge girder erection machine can be reduced, the construction time is shortened, the middle girder can be lifted off and then disassembled under a bridge, a crane is not needed for operation, the disassembling process is simplified, the safety of constructors is guaranteed, and the construction efficiency is improved on the whole.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a front leg employed in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a middle support used in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a rear bracket used in an embodiment of the present invention;
FIG. 4 is a schematic structural view of a rear leg employed in an embodiment of the present invention;
FIGS. 5-9 are schematic diagrams illustrating steps of a method for installing a road bridge girder erection machine according to an embodiment of the present invention
Fig. 10-12 are flow charts of main beam installation of the method for installing a road bridge girder erection machine according to the embodiment of the invention;
FIG. 13 is a schematic structural view of a road bridge girder erection machine used in an embodiment of the present invention;
FIG. 14 is a view from the A direction of the front leg of FIG. 13;
FIG. 15 is a view of the middle bracket of FIG. 13 in the direction of A;
FIG. 16 is a view of the rear bracket of FIG. 13 in the direction of A;
fig. 17 is a process flow chart of a method for installing a road bridge girder erection machine according to an embodiment of the invention.
In the figure: 1. a front leg; 2. middle support; 3. supporting the rear part; 4. a main beam; 5. a guide beam; 6. lifting the trolley; 7. a center sill; 8. the front support moves across the track; 9. the middle support transversely moves the track; 10. a beam surface; 11. a rear leg; 12. a middle section beam; 13. an end segment beam; 14. a crane.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 17 together, a method for installing a road bridge girder erection machine according to the present invention will now be described. The method for installing the highway bridge girder erection machine comprises the steps of installing a front supporting leg 1 on a bridge pier; mounting a middle support 2 and a rear support 3 on a paved precast beam surface 10, wherein the middle support 2 is positioned between the rear support 3 and the front leg 1; assembling a plurality of intermediate section beams 12 into an intermediate beam 7; hoisting the middle beam 7 to the middle support 2 and the rear support 3, wherein the middle support 2 is fixed with the front end part of the middle beam 7, and the rear support 3 is fixed with the rear end part of the middle beam 7; simultaneously mounting end section beams 13 at both ends of the middle beam 7 until a main beam 4 is formed; fixing the front support legs 1 and the front end parts of the main beams 4; the main beam 4 is provided with auxiliary components.
The method for installing the highway bridge girder erection machine has the beneficial effects that: compared with the prior art, the method for installing the highway bridge erecting machine comprises the steps of sequentially installing the front support legs 1, the middle support 2 and the rear support 3, installing the main beam 4, assembling the middle beam 7 firstly when installing the main beam 4, then hanging the middle beam 7 on the installed middle support 2 and the installed rear support 3, simultaneously installing the end section beams 13 at two ends of the middle beam 7, finally completing the installation of the main beam 4, and then installing other accessory components. According to the mounting method of the highway bridge erecting machine, the middle beam 7 is firstly assembled when the main beam 4 is mounted, and the crane 14 is convenient to lift the head end and the tail end of the middle beam 7, so that two working faces are provided when the subsequent end section beam 13 is assembled, the operation space is large, the accurate alignment is convenient, the end section beams 13 at the two ends can be simultaneously assembled, the adjustment is relatively convenient, the mounting flexibility is improved, the mounting difficulty is reduced, the assembling time is shortened, the construction efficiency is improved, and the safety factor is also improved.
As a specific implementation manner of the installation method of the highway bridge erecting machine provided by the invention, before installation, construction plane arrangement is performed, and the construction plane arrangement comprises the following steps: site requirements, site layout, construction site preparation, and site inspection.
① bridge erecting machine assembly is mainly carried out on a bridge, bridge deck should be connected firmly, bearing capacity meets the requirement of bridge erecting machine storage and installation, ② assembled site bridge bottom should be wide enough to ensure crane 14 operation, empty ground of crane 14 station position should be left in construction, occupied site under bridge is not less than 100 and 9 square meters, ③ site is filled with soil, compacted, ground should be flat, foundation bearing capacity can meet the requirement of truck crane station lifting, main beam 44 and support legs should be laid with sleeper when ground assembly, ④ site has no water accumulation and has drainage measure, ⑤ crane 14 operation area has no high voltage wire and other power wire to pass through, ⑥ assembling site should be provided with a house for storing tools and small parts.
When the place was arranged, bridge crane spare part all placed under the bridge floor was close to the bridge and on the bridge of way limit position, carries out the arbor and adorns the operation when easy to assemble.
Construction site preparation needs to guarantee the construction and the erection of the temporary construction, the site of the construction site and the smoothness of traffic roads: (1) according to the construction plan layout and the installation and construction requirements, the site is cleaned and leveled, and the installation site is ensured to have no sundries, so that the temporary storage and installation requirements of the parts of the equipment are met, and the hoisting channel is ensured to be smooth, so that the installation work is carried out smoothly. (2) The large crane 14, equipment access and predetermined on-site stacking assembly sites should be tamped, compacted or hardened. In particular, the crane 14 position is expected to correspond to the required foundation bearing capacity.
The site inspection comprises the following points: (1) whether the specification and the arrangement of the construction machine are consistent with the hoisting scheme or not and the operation is convenient; (2) whether the records of the qualification certificate and the cleaning, checking and testing of the machine tool are complete or not; (3) self-checking records of hidden projects (such as ground anchors, foundations and the like); (4) checking and testing the workpiece and whether the work to be carried out before hoisting is finished; (5) whether the quality and the position of the foundation and the foundation bolts of the workpiece meet the engineering requirements or not; (6) whether the quality of the backfill around the foundation is qualified or not; (7) whether the construction site is solid and flat or not; (8) whether a road where the workpieces are transported is leveled and compacted according to requirements or not; (9) whether the cable wind rope is adjusted to a certain angle according to the regulation or not can be stressed according to the distribution; (10) whether the power supply department can guarantee normal power supply; (11) weather forecasting conditions; (12) whether the commander and the constructor are familiar with the work content; (13) whether the assistant is well matched; (14) whether spare tools and materials are prepared or not; (15) whether all obstacles hindering the hoisting work are properly treated or not; (16) others are as to whether the preparation is ready. (17) After the certificate is checked to be qualified, the mobile phone can be lifted.
As a specific implementation manner of the method for installing a road bridge girder erection machine provided by the invention, the method for installing the auxiliary components on the main beam 4 specifically comprises the following steps: and a guide beam 5, a lifting mechanism, electrical equipment and a lifting appliance are arranged on the main beam 4.
As an embodiment of the method for installing a road bridge girder erection machine according to the present invention, referring to fig. 5 to 9 and 14, a front leg 1 is installed on a bridge pier, which includes: paving a front support transverse moving rail 8 on the pier, wherein the distance between supporting points at two ends of the front support transverse moving rail 8 is not more than 1 m; the front leg 1 is assembled, and the front leg 1 is hoisted to the front support cross sliding rail 8 by a crane 14. After the front supporting transverse rail 8 is laid, the bearing capacity of a fulcrum on the rail is not less than 30 tons when a support pad is supported, and the bearing capacity of the support pad is not less than 50 tons; assembling the front leg 1 comprises assembling the parts of the front leg 1 into a whole according to the requirements of straight, inclined and bent bridges.
When the front support sliding rail 8 is laid, the front support sliding rail 88 is placed on a pier (or an erected beam surface 10 or a back blocking wall or a capping beam), and the bottom is leveled by using a sleeper or a steel frame for supporting and using a level gauge. When two webs are erected on the cover beams simultaneously, if the distance between the two cover beams exceeds 1 m, the transverse moving track is locally reinforced to meet the strength requirement.
As an embodiment of the method for installing a road bridge girder erection machine provided by the present invention, please refer to fig. 5 to 9 and fig. 15 to 16 that the installation of the support 2 and the rear support 3 specifically includes: (1) the middle support 2 is placed on the top of the end head of the erected beam slab, and a steel frame support pad is arranged at the bottom of the end head. The distance between the two fulcrums is not more than 1 meter, and the bearing capacity of each fulcrum is not less than 30 tons when the cushion is supported. The bearing capacity of the support pads at the two ends of the transverse moving track of the middle support 2 is not less than 50 tons. When the left and right box girders are erected simultaneously and the distance between the two box girders exceeds 1 m, the suspended part is locally reinforced to meet the strength requirement. (2) The middle support 2 transverse moving track is adjusted to be horizontal by using a level meter, and is required to be parallel to the front support transverse moving track 8, and the distance deviation between the two ends is not more than 2 cm. (3) The middle support 2 components are assembled into a whole according to a bridge flat curve, the whole is placed on the upper portion of the middle support 2 transverse moving track according to the via hole direction, and the center distance between the two middle supports 2 is determined according to actual needs. (4) And installing a temporary power supply and checking whether the wheel turning of the middle support 2 is consistent. (5) The rear support 3 is assembled into a whole and is arranged at the tail end of the bridge girder erection machine.
Referring to fig. 10 to 12, as an embodiment of the method for installing a road bridge girder erection machine according to the present invention, assembling a plurality of intermediate section girders 12 into an intermediate girder 7 specifically includes: numbering the middle section beams 12 according to the placing positions of the middle section beams 12; a plurality of correspondingly numbered intermediate section beams 12 are assembled to form the intermediate beam 7. Can conveniently assemble main girder 4 through the serial number, the installation that can implement tip segment roof beam 13 at its both ends simultaneously after middle beam 7 is installed earlier, shortens installation time.
Referring to fig. 10 to 12, as an embodiment of the method for installing a road bridge girder erection machine according to the present invention, the method for hoisting the middle beam 7 to the middle tray 2 and the rear tray 3 includes: the middle beam 7 is hoisted to the middle support 2 and the rear support 3 by two sets of cranes 14 respectively arranged at the two ends of the middle beam 7. The installation of the segmental beam is simultaneously carried out at the two ends of the middle beam 7 until the main beam 4 is formed, and the method specifically comprises the following steps: numbering the end section beams 13 according to the placing positions of the end section beams 13; the cranes 14 located at both ends of the intermediate beam 7 are positioned unchanged while the end section beams 13 are installed one by one at both ends of the intermediate beam 7; when one end section beam 13 is completely installed, the position of the corresponding crane 14 is moved toward the free end of the end section beam 13, and after moving to a designated position, installation of the next end section beam 13 is performed until the main beam 4 is formed. The end section beams 13 at the two ends of the process can be simultaneously installed, the implementation is convenient, the installation process is simplified, and the installation time is shortened.
Referring to fig. 10 to 12, as a specific embodiment of the method for installing a road bridge girder erection machine according to the present invention, the intermediate section girder 12 and the end section girder 13 are uniformly numbered according to the placement positions. Taking the example that the main beam 4 comprises 7 sections of section beams, the numbers of the middle section beam 12 and the end section beam 13 can be numbered sequentially from 1 to 7 according to the installation positions of the middle section beam and the end section beam in one direction; or the number of the middle 3 sections of sectional beams is 1, 2 and 3 according to the installation position, then the number of the two end section beams 13 arranged on the beam No. 1 is 1-1 and 1-2, the number of the two end section beams 13 arranged on the beam No. 3 is 3-1 and 3-2, and the number can make the operator know the installation position of the corresponding middle section beam 12 or the end section beam 13, so that the assembly of the operator is facilitated.
As a specific embodiment of the method for installing a road bridge girder erection machine provided by the present invention, referring to fig. 5 to 9, after the main girder 4 is formed, the method further includes installing rear legs 11 on the precast girder surface 10; the rear legs 11 are fixed to the rear end of the main beam 4. The main beams 4 are divided into two rows, whether the center distance of the two rows of main beams 4 meets the requirement is checked (namely, the deviation of two ends of the main beams 4 is not more than 5mm, and the deviation of the middle of the main beams 4 is not more than 7mm) or not, then the main beam 4 front connecting frame, the main beam rear upper beam and the main beam 55 connecting frame are sequentially installed by a crane 14, and finally the main beam rear support leg 11 is installed; the main beam 4 can be installed by two 70-ton truck cranes for auxiliary assembly.
As a specific embodiment of the method for installing a road bridge girder erection machine provided by the present invention, the fixing of the front support legs 1 and the front end of the main beam 4 specifically comprises: (1) and installing a hydraulic system of the front support leg 1. (2) Connecting the oil cylinder of the front supporting leg 1 with an oil pump, starting the oil pump of the front supporting leg 1, and connecting the oil cylinder with the upper and lower cross beams by a pin shaft. (3) Starting an oil pump of the front supporting leg 1 and jacking the upper part of the front supporting leg 1, or hoisting the whole front supporting leg 1 by using a crane, and connecting the front supporting leg 1 and the main beam 4 into a whole by using bolts. (4) The height of the wheel box at the lower part of the front supporting leg 1 is adjusted through the oil cylinder, so that the wheel box is supported on the front supporting transverse moving track 8.
As a specific embodiment of the method for installing a road bridge girder erection machine provided by the present invention, referring to fig. 13 and 16, the lifting mechanism includes a lifting trolley 6 and a traverse trolley, and the installation of the lifting mechanism on the main beam 4 specifically includes: assembling the longitudinally-moving wheel box and the carrying pole beam into a lifting trolley 6; the hoisting trolley 6 is placed on the track of the main beam 4 by using a crane 14, and the middle shifting wheel box is matched with the main beam 4 in a rolling way; placing the traverse trolley on the traverse rail of the lifting trolley 6; the winch is hoisted to the body of the transverse trolley and is provided with a weather shed. The weather shed is used for covering the winch.
Specifically, wherein lift truck 6 includes two and indulges the round case that moves, two indulge the round case that moves and roll the cooperation with two main beams 4 respectively, and two round case center distance deviations are not more than 3mm, and shoulder pole roof beam center distance deviation is not more than 3mm, because the particularity of bridging machine operating mode, hoist engine wire rope lifts by crane 300 times, must change new wire rope, prevents that wire rope wearing and tearing from seriously causing the incident, guarantees construction safety.
The lifting longitudinal-moving wheel box and the carrying pole beam are important links for assembling the bridge girder erection machine, the guide beam 5 and other parts are assembled to be a foundation for installing the guide beam, and the installation of the lifting longitudinal-moving wheel box and the carrying pole beam is also an effective means for checking whether the installation of the guide beam 5 and the carrying pole part is qualified. The distance between the centers of the load bearing beams is 1.7 meters, and after the load bearing beams are installed according to the data, the walking wheels can be positioned at the centers of the steel rails, so that the walking wheels are not easy to deviate, the walking wheels are not easy to have deviation angles, and the rail engagement can be prevented; secondly, other parts can be guaranteed to be installed (the slide groove and the connecting bolt).
As a specific implementation mode of the method for installing the road bridge girder erection machine, electrical equipment is installed by referring to an electrical appliance schematic diagram and a wiring diagram. Before the bridge girder erection machine works, a temporary power supply is connected to determine whether the steering of each driving motor is correct and consistent, whether a brake is effective and whether each safety device is safe and reliable.
As a specific implementation mode of the method for installing the highway bridge erecting machine provided by the invention, the steel wire rope is wound according to requirements when the lifting appliance is installed, and the winding notice of the steel wire rope comprises the following points: (1) the steel wire rope needs to be penetrated from the middle part of the driven pulley. (2) The end part of the steel wire rope is fixed on the fixed pulley. (3) And after the steel wire rope is threaded, a lifting appliance is installed. The hanger is ensured to naturally droop, torsion is avoided, and mutual interference between the steel wire ropes is avoided. (4) When the hanger is placed at the required lowest position, the steel wire rope on the winding drum has to be not less than three turns and is not suitable to be more than ten turns.
As a specific embodiment of the installation method of the road bridge girder erection machine provided by the invention, the accessory parts further comprise a ladder stand and a guardrail, and the installation can be carried out according to the existing requirements.
As a specific implementation manner of the method for installing the highway bridge erecting machine provided by the invention, the method further comprises a trial operation after the auxiliary components are installed on the main beam 4, wherein the trial operation comprises an idle test, a static load test and a dynamic load test of the highway bridge erecting machine. The stability of the operation of the bridge girder erection machine can be detected through trial operation, and the debugging is convenient.
The no-load test process is as follows: the lifting trolley 6 walks back and forth along the main beam 4 for a plurality of times in no-load way, and the wheels do not obviously slip. The lifting mechanism is started, the empty hook is lifted for a plurality of times, and the switch action is sensitive and accurate. Two lifting trolleys 6 are driven to stride, the whole machine walks for a plurality of times within the range of 5 meters in front and back, the starting and braking wheels do not slip, and the running is balanced.
The static load test process is as follows: two lifting trolleys 6 stop at the midspan, lift the rated load, lift 1.25 times of the rated load at a position 10cm away from the ground, suspend for one minute for unloading, check whether the main beam 4 of the bridge girder erection machine has residual deformation, and after repeated times, the main beam 4 does not have residual deformation any more.
The dynamic load test process is as follows: the lifter hook and the lifting trolley 6 are repeatedly operated at a low speed by 1.1 times of rated load to start the brakes of the braking mechanisms, the control of the electric appliance is sensitive, accurate and reliable, the vibration of the main beam 4 is normal, and the operation of the mechanisms is balanced; after unloading, all mechanisms and the main beam 4 are not damaged or deformed.
As a specific implementation manner of the installation method of the highway bridge erecting machine provided by the invention, the method further comprises a check before operation before the test operation, wherein the check before operation comprises the following steps: checking whether the steering directions of all motors of the same running mechanism are the same; adjusting the brake pad and the brake gap of the winch; check whether the excellence in each reduction gear is sufficient. After the operation is finished and the requirements are compounded, self-checking and acceptance of special equipment of the quality supervision bureau can be organized according to relevant regulations.
Referring to fig. 1 to 17, a method for disassembling a road bridge girder erection machine according to the present invention will now be described. The method for disassembling the highway bridge girder erection machine is used for disassembling the highway bridge girder erection machine and comprises the following steps: detaching the auxiliary components on the main beam 4; the connection relation between the front supporting leg 1 and the main beam 4 is released; removing the end section beam 13; contacting the connection relation of the middle beam 7 and the middle support 2 and the rear support 3, and lifting the middle beam 7 away; removing the middle support 2 and the rear support 3; the front leg 1 is removed.
The method for disassembling the highway bridge girder erection machine has the beneficial effects that: compared with the prior art, the method for disassembling the highway bridge girder erection machine firstly disassembles the accessory parts and removes the connection relation between the front supporting legs 1 and the main girder 4, then disassembles the end section girder 13, removes the connection relation between the middle girder 7 and the middle support 2 and the rear support 3, lifts off and then disassembles other parts. According to the disassembling method of the highway bridge girder erection machine, two ends can be simultaneously disassembled when the end section beam 13 is disassembled, two working faces are provided, the disassembling time of the bridge girder erection machine can be reduced, the construction time is shortened, the middle beam 7 can be lifted off firstly and then disassembled under a bridge, the crane 14 is not needed for operation, the disassembling process is simplified, the safety of constructors is guaranteed, and the construction efficiency is improved as a whole.
As a specific implementation mode of the dismounting method of the highway bridge erecting machine provided by the invention, before dismounting, the highway bridge erecting machine is transversely moved to a dismounting position, and a support leg motor and a walking wheel of the highway bridge erecting machine are well cushioned and fixed; the crown block runs to a disassembly position, and the electrical equipment is disassembled after the power supply is cut off; and dismantling all the parts in reverse sequence according to the mounting steps of the highway bridge erecting machine.
The detailed construction process comprises the following steps: the bridge girder erection machine moves transversely to the disassembly position → the support leg motor and the walking wheel are well cushioned → the support leg is fixed → the overhead traveling crane runs to the disassembly position → the power supply is cut off → the electric equipment such as electric wires is disassembled → the overhead traveling crane and the winch are disassembled → the guide beam 5 is disassembled → the end segment beams 13 on the two sides of the main beam 4 are sequentially disassembled → the middle beam 7 is integrally disassembled to be arranged under the bridge → the middle beam 7 is disassembled and loaded for transportation → the front support leg 1 is disassembled → the middle support 2 and the rear support 3 → the front support transverse moving track 8 is disassembled → the small piece loading for transportation → the disassembly construction is completed for clearing the field.
As a specific implementation mode of the dismounting method of the highway bridge girder erection machine provided by the invention, the dismounting construction steps are as follows: (1) according to the construction condition of the disassembly site, the bridge girder erection machine runs to the disassembly position after the beam slab erection is completed, and is close to one side of the toilet way, so that the loading and the transferring are convenient. (2) The fixed landing leg position is put with wire rope and chain block fixed landing leg position, and the walking wheel position is filled up with the wooden wedge, and the place that has the motor is filled up with wooden, prevents to empty and collide with the damage. (3) The hoisting steel wire rope is lifted to a specified height, and the overhead traveling crane runs to one side close to the sidewalk, so that the subsequent dismantling is facilitated; after the preparation work is finished and the inspection is finished, the power supply is cut off. (4) The electrical equipment is disassembled, and the marking is needed when the electrical equipment is disassembled, so that errors are prevented during the installation. (5) The traverse carriage and the lifting carriage 6 are dismantled by a 70t truck crane, the weather shed (dismantled) is cut off by gas welding before the dismantling, then the traverse carriage is dismantled, and finally the traverse carriage is lifted away from the traverse rail of the lifting carriage 6. The detached winch, the transverse trolley and the lifting trolley 6 are paved by sleepers. (6) And (4) dismantling the main beam 4. (7) The front supporting legs 1, the middle support 2 and the rear support 3 are removed by a 50t truck crane. (8) And loading and transferring other small pieces by a 50t truck crane.
As a specific embodiment of the method for disassembling a road bridge girder erection machine provided by the present invention, before disassembling the end section beam 13, the method further comprises: the center sill 7 is sealed. The middle beam 7 is sealed and then the end section beam 13 is dismantled, so that the stability of the middle beam 7 in the dismantling process can be guaranteed, and safety accidents caused by unstable connection of the middle beam 7 due to dismantling of the end section beam 13 are prevented.
Specifically, the middle beam 7 may be sealed by a 5T chain block, the end section beam 13 is removed by a 70T crane, and the connecting members (including the front connecting frame, the rear cross beam, the connecting frame, and the operating room) of the main beam 4 are sequentially removed before the middle beam 7 is sealed.
As a specific embodiment of the method for disassembling a road bridge girder erection machine provided by the present invention, after the intermediate beam 7 is lifted away, the method further comprises: the intermediate beams 7 are hoisted to the ground and the intermediate section beams 12 are removed one by one. After the middle beam 7 is lifted to the ground, the middle beam can be disassembled by operators on the ground, and other operators continue to disassemble the bridge girder erection machine, so that the disassembly time is shortened, and the operation efficiency is improved.
As a specific embodiment of the method for disassembling a road bridge girder erection machine provided by the present invention, the step of disassembling the front support leg 1 comprises: firstly, dismantling the road bridge girder erection machine by the front support legs 1; the rails and components of the front leg 1 are disassembled and transported under the bridge. The middle support 2 and the front support leg 1 are detached in the same step, and the middle support 2 is detached, disassembled, loaded and transported; the rear tray 3 is the same as the middle tray 2 in the dismounting step. The method of first dismantling from the underbridge and then dismantling from the underbridge can shorten the dismantling time and improve the dismantling efficiency.
The method for installing and disassembling the highway bridge girder erection machine is mainly suitable for installing and disassembling 180t/40 type bridge girder erection machines and 160t/40 type bridge girder erection machines.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The method for installing the highway bridge erecting machine is characterized by comprising the following steps of:
mounting front support legs on the bridge piers;
installing a middle support and a rear support on the paved precast beam surface, wherein the middle support is positioned between the rear support and the front supporting leg;
assembling a plurality of intermediate section beams into an intermediate beam;
hoisting the middle beam to the middle support and the rear support, wherein the middle support is fixed with the front end part of the middle beam, and the rear support is fixed with the rear end part of the middle beam;
simultaneously mounting end section beams at two ends of the middle beam until a main beam is formed;
fixing the front support leg to the front end of the main beam;
and an accessory component is arranged on the main beam.
2. The method for installing a road bridge girder erection machine according to claim 1, wherein the step of installing an accessory on the main beam specifically comprises:
and a guide beam, a lifting mechanism, electrical equipment and a lifting appliance are arranged on the main beam.
3. The method for installing the road bridge girder erection machine according to claim 1, wherein the step of installing the front support leg on the pier specifically comprises:
paving a front support transverse moving track on the bridge pier, wherein the distance between supporting points at two ends of the front support transverse moving track is not more than 1 m;
assembling the front support leg, and hoisting the front support leg to the front support cross sliding rail through a crane.
4. The method for installing a road bridge girder erection machine according to claim 1, wherein the assembling of the plurality of intermediate section girders into the intermediate girder specifically comprises:
numbering the middle section beams according to the placing positions of the middle section beams;
assembling a plurality of the middle section beams with corresponding labels to form the middle beam.
5. The method for installing the road bridge girder erection machine according to claim 4, wherein the hoisting of the intermediate beam to the intermediate support and the rear support specifically comprises:
hoisting the middle beam to the middle support and the rear support through two groups of cranes respectively arranged at two ends of the middle beam;
the installation of the segmental beam is simultaneously carried out at two ends of the middle beam until a main beam is formed, and the method specifically comprises the following steps:
numbering the end section beams according to the placing positions of the end section beams;
the crane positions at both ends of the intermediate beam are unchanged, and the end section beams are installed at both ends of the intermediate beam one by one;
when one of the end section beams is completely installed, the corresponding crane position moves to the free end of the end section beam, and after the crane position is moved to the designated position, the installation of the next end section beam is carried out until the main beam is formed.
6. The method of installing a road bridge girder erection machine according to claim 1, further comprising, after forming the main girder:
mounting rear support legs on the precast beam surface;
the rear legs are fixed to the rear end of the main beam.
7. The method for installing the road bridge girder erection machine according to claim 2, wherein the lifting mechanism comprises a lifting trolley and a cross trolley, and the installation of the lifting mechanism on the main girder specifically comprises:
assembling the longitudinally-moving wheel box and the carrying pole beam into the lifting trolley;
placing the lifting trolley on a track of the main beam by using a crane, and enabling the longitudinally-moving wheel box to be in rolling fit with the main beam;
placing the traverse trolley on a traverse rail of the lifting trolley;
and hoisting the winch to the trolley body of the transverse moving trolley, and installing a weather shed for covering the winch.
8. A method of disassembling a road bridge girder erection machine according to any one of claims 1 to 7, comprising the steps of:
detaching the auxiliary components on the main beam;
removing the connection relation between the front supporting legs and the main beam;
disassembling the end section beam;
removing the connection relation between the middle beam and the middle support and the rear support, and lifting the middle beam away;
removing the middle support and the rear support;
and removing the front supporting leg.
9. The method of disassembling a road bridge girder erection machine according to claim 8, wherein before disassembling the end section girder, further comprising:
and sealing the middle beam.
10. The method of disassembling a road bridge girder erection machine according to claim 9, wherein after the suspending the intermediate beam off, further comprising:
and hoisting the middle beams to the ground, and dismantling the middle section beams one by one.
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| CN111139742B (en) | 2022-03-29 |
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