CN113123246B - Bridge girder erection machine dismantling method - Google Patents
Bridge girder erection machine dismantling method Download PDFInfo
- Publication number
- CN113123246B CN113123246B CN202110421847.7A CN202110421847A CN113123246B CN 113123246 B CN113123246 B CN 113123246B CN 202110421847 A CN202110421847 A CN 202110421847A CN 113123246 B CN113123246 B CN 113123246B
- Authority
- CN
- China
- Prior art keywords
- bridge girder
- girder erection
- erection machine
- dismantling
- guide beam
- 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.)
- Active
Links
Images
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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/56—Reuse, recycling or recovery technologies of vehicles
Abstract
The invention discloses a bridge girder erection machine dismantling method, which relates to the technical field of bridge construction and comprises the following steps: after the end hole section beam is erected, the bridge girder erection machine returns for the length distance of one guide beam, then the bridge girder erection machine is transformed, and then the bridge girder erection machine returns to travel; adopting truck cranes to respectively stand at the end parts of the front guide beam and the rear guide beam, and respectively hoisting and dismantling the front guide beam supporting leg and the rear guide beam supporting leg; respectively dismantling the front guide beam and the rear guide beam; dismantling the segment supporting beam by using a hoisting overhead traveling crane; dismantling the main beam by using a truck crane; and dismantling the bearing support legs and the longitudinal and transverse moving trolley by utilizing the truck crane. The bridge girder erection machine is retracted to the low pier and then is dismantled, so that the hoisting construction of the high pier is avoided, the dismantling construction is facilitated, the bridge girder erection machine is fast dismantled, and the construction safety and quality are guaranteed.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a bridge girder erection machine dismantling method.
Background
In the traditional bridge girder erection machine dismantling construction, a construction method of carrying out in-situ hoisting dismantling on a bridge girder erection machine by using a crane is often adopted, but the construction method is only suitable for the conditions of wide ground field and hard geology at the original position. For the condition that the tail hole beams erected by the bridge girder erection machine are all positioned on water and the pier heights are all more than 30 meters, if the construction is carried out by adopting the in-situ removal method of the bridge girder erection machine, a trestle needs to be erected again or an island needs to be built, the foundation needs to be reinforced, meanwhile, a temporary access to a highway needs to be built, a temporary road needs to be blocked, and the like.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the embodiment of the invention provides a bridge girder erection machine dismantling method, which is used for realizing the quick dismantling of a bridge girder erection machine.
The bridge girder erection machine dismantling method provided by the embodiment of the invention comprises the following steps:
after the end hole section beam is erected, the bridge girder erection machine returns for the length distance of one guide beam, then the bridge girder erection machine is transformed, and then the bridge girder erection machine returns to travel;
adopting truck cranes to respectively stand at the end parts of the front guide beam and the rear guide beam, and respectively hoisting and dismantling the front guide beam supporting leg and the rear guide beam supporting leg;
respectively dismantling the front guide beam and the rear guide beam;
dismantling the segment supporting beam by using a hoisting crown block;
dismantling a hoisting crown block by using a truck crane;
dismantling the main beam by using a truck crane; and
the device comprises a bearing support leg ladder platform, a longitudinal and transverse moving trolley, a jacking oil cylinder, a bearing support leg main body and a restraint device which are dismantled by using a truck crane.
Furthermore, when the bridge girder erection machine runs in a retreating mode, the lifting crown block is used for integrally disassembling the bearing support legs arranged on the rear pier and lifting the bearing support legs to the advanced pier for installation, and the integral via hole longitudinal movement retreating of the bridge girder erection machine is realized under the pushing action of the longitudinal movement oil cylinders of the longitudinal and transverse movement trolley of the bearing support legs.
Furthermore, when the bridge girder erection machine retreats to a curve and circular curve simply supported girder section, the angle of the bridge girder erection machine during advancing is adjusted through a longitudinal and transverse trolley arranged on the bearing supporting leg, and meanwhile, the non-jacking connection system is finely adjusted along the transverse bridge direction, so that the bridge girder erection machine can successfully retreat along the minimum curve radius.
Further, the lifting connection system is transformed before the running is backed, and the method comprises the following steps:
rotating open the segment support beams;
unlocking the longitudinal restraint of the bridge girder erection machine;
driving a longitudinal moving oil cylinder of the longitudinal and transverse moving trolley to push a main frame of the bridge girder erection machine to move longitudinally;
the rear auxiliary supporting leg is used as a reference, and when the rear auxiliary supporting leg can be folded to enter the beam seam, the bridge girder erection machine stops longitudinally moving;
after the rear auxiliary supporting leg is stably jacked, a hoisting crown block is used for dismantling a beam of the front auxiliary supporting leg;
welding a connecting flange seat of a newly-made jacking connecting system at the position which is away from the rear part of the center of the beam of the original front auxiliary supporting leg;
the prefabricated jacking connection system and the welded connection flange seat are connected and screwed down by the hoisting crown block through high-strength bolts;
and carrying out graded loading on the transformed jacking connection system so as to finally confirm the stress reliability of the jacking connection system.
Furthermore, in the process of driving the longitudinal moving oil cylinder on the longitudinal and transverse moving trolley to push the main frame to move longitudinally, the hoisting crown block is always positioned above the middle pier to serve as a balance weight.
Further, in the backward running process, the specific steps of via holes include:
the jacking connection system jacks again, and the front guide beam and the bearing support leg are disengaged; meanwhile, a safety steel support is arranged on the outer side of the jack and is tightly plugged and padded by a rubber plate or a cork plate;
dismantling the rear pier bearing support leg, transporting the hoisting crown block to the advanced pier, and installing the advanced pier bearing support leg by using the hoisting crown block;
the hoisting crown block runs above the middle pier, meanwhile, the rear auxiliary supporting leg retracts, the rear guide beam falls on the load-bearing supporting leg of the front pier, the jacking connection system retracts and vacates, and at the moment, the guide beam is in a large cantilever state;
driving a longitudinal moving oil cylinder on the longitudinal and transverse moving trolley to push the main frame to move longitudinally;
longitudinally moving the whole machine to form a through hole, enabling the center of the main frame to coincide with the center of the bridge span, and returning the through hole to the position when the main frame is positioned at the beam erecting position, and checking all aspects to prepare the next through hole;
and repeating the steps until the bridge girder erection machine returns to the position between the short piers, and then performing dismantling work.
Furthermore, the lower cross beam of the lower auxiliary support is detached before the bridge girder erection machine passes through the hole.
Furthermore, before the guide beam is dismantled, a plurality of concrete movable pedestals or I-steel pedestals are arranged at the lower part of the guide beam.
And further, before the main beam is dismantled, concrete pedestals are laid on two sides of a pier position below the main beam.
Further, when the main beam is detached, the left main beam and the right main beam are integrally lifted by using the truck crane, the two cranes turn the large arm step by step to enable the main beam to be in place on the concrete pedestal, and the two truck cranes hook down to enable the main beam to fall on the pedestal.
Based on the technical scheme, the embodiment of the invention at least has the following beneficial effects: the bridge girder erection machine is retracted to the low pier and then is dismantled, so that the dismantling construction is facilitated, and the bridge girder erection machine is fast dismantled. Meanwhile, the bridge girder erection machine is dismantled after returning to the low pier, so that the safety risk is low, a large amount of civil constructions such as foundation reinforcement and backfilling are reduced, the high pier hoisting construction is avoided, and the construction safety and quality are ensured.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
FIG. 1 is a main elevation view of a bridge girder erection machine according to an embodiment of the present invention;
FIG. 2 is a side view of a front cross beam and a front auxiliary leg of the bridge girder erection machine in an embodiment of the invention;
FIG. 3 is a schematic view of a final hole setting apparatus according to an embodiment of the present invention;
FIG. 4a is a schematic front view of a front auxiliary leg modification in an embodiment of the present invention;
FIG. 4b is a side schematic view of a front auxiliary leg modification in an embodiment of the present invention;
FIG. 5a is a schematic front view of an intermediate connection system modification according to an embodiment of the present invention;
FIG. 5b is a side view of an embodiment of the present invention with a modified intermediate linkage system;
FIG. 6 is a view of a non-jacking attachment train installation and its bolting in accordance with an embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating a bridge girder erection machine according to an embodiment of the invention;
FIG. 8 is a schematic view of a jacking connection installation in accordance with an embodiment of the present invention;
FIG. 9 is one of the schematic diagrams of the retracting and running of the bridge girder erection machine according to the embodiment of the invention;
FIG. 10 is a second schematic diagram of the backward movement of the bridge girder erection machine according to the embodiment of the present invention, wherein the direction indicated by the arrow is the backward movement direction of the bridge girder erection machine;
FIG. 11a is a schematic representation of a truck crane position with the front and rear guide beam legs removed according to an embodiment of the present invention;
FIG. 11b is another schematic view of a truck crane station with the front and rear guide beam legs removed in accordance with an embodiment of the present invention;
FIG. 12 is a schematic view of a truck crane station with the rear guide beam removed in an embodiment of the present invention;
FIG. 13 is a schematic view of a truck crane position with the front guide beam removed in an embodiment of the present invention;
FIG. 14 is a schematic illustration of a section support rail removal in accordance with an embodiment of the present invention;
FIG. 15a is a schematic view of a truck crane station when the crane is removed;
FIG. 15b is a schematic view of another view of the truck crane station when the crane is removed for lifting the whole crane according to the embodiment of the present invention;
FIG. 16 is a schematic view of the embodiment of the present invention with the main beam removed and lifted and dropped;
fig. 17 is a schematic illustration of the removal of a load-bearing leg, a column leg, etc., according to an embodiment of the present invention.
Reference numerals: the crane comprises a truck crane 1, a concrete pedestal 2, a bridge girder erection machine 10, a hoisting crown block 11, a section supporting beam 12, a main beam 13, a bearing leg 21, a front auxiliary leg 22, a front guide beam 31, a rear guide beam 32, an upper beam 33, a lower beam 34, a non-jacking connecting system 41 and a jacking connecting system 42.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, a bridge girder erection machine 10 dismantling method provided by the embodiment of the invention includes the following steps:
after the end hole section beam is erected, the bridge girder erection machine 10 retreats by the length distance of one guide beam, then the bridge girder erection machine 10 is transformed, and then the bridge girder erection machine 10 retreats to run;
adopting a truck crane 1 to respectively stand at the end parts of a front guide beam and a rear guide beam 32, and respectively hoisting and dismantling the front guide beam supporting leg and the rear guide beam supporting leg;
the front guide beam 31 and the rear guide beam 32 are respectively removed;
dismantling the segment supporting beam 12 by using the hoisting crown block 11;
a crane 1 is used for dismantling the hoisting overhead crane 11;
dismantling the main beam 13 by using the truck crane 1; and
and (4) removing the bearing support legs and the longitudinal and transverse moving trolley by using the truck crane 1.
After the end-hole section beam is erected, the bridge erecting machine 10 is retracted and moved to the low pier for dismantling, so that the dismantling construction is facilitated, and the bridge erecting machine 10 is rapidly dismantled. Meanwhile, the bridge girder erection machine 10 is disassembled after being retracted to the low pier, so that the safety risk is low, a large amount of civil constructions such as foundation reinforcement and backfilling are reduced, the high pier hoisting construction is avoided, and the construction safety and quality are ensured. In addition, the demolition method provided by the embodiment of the invention is not influenced by the flood season water level, civil constructions such as filling and guiding, foundation reinforcement and the like are not needed, traffic control and road fluffing are not needed, and the investment of basic measure cost is greatly reduced.
Specifically, before the bridge girder erection machine 10 erects the tail hole segment girder, the bridge girder erection machine is firstly transformed, and after the transformed parts of the bridge girder erection machine 10 are processed by a manufacturer, hoisting and installing are carried out by using the hoisting crown block 11 after the transformed parts are qualified through inspection. After the reconstruction, the erection of the end hole section beam is performed, as shown in fig. 3.
When the bridge girder erection machine 10 is transformed, the supporting cross beams 12 of the segments are rotated to be opened, the longitudinal restraint of the bridge girder erection machine is relieved, then the longitudinal and transverse moving trolley longitudinal moving oil cylinder is driven, and the main frame of the bridge girder erection machine 10 is pushed to longitudinally move through the hole. It should be noted that in this process, the hoisting overhead traveling crane 11 is located right above the rear abutment trolley as a counterweight. The bridge girder erection machine 10 then stops the longitudinal movement when the rear auxiliary legs can be folded into the beam joints, based on the rear auxiliary legs. And then, supporting the front auxiliary supporting leg and the rear auxiliary supporting leg on the pier top of a pier, after the bridge girder erection machine 10 is stressed stably, transporting the front bearing supporting leg 21 to the front pier position by the hoisting crown block 11, installing firmly, detaching a jack and a casing portal frame below a cross beam of the front auxiliary supporting leg 22, and keeping the upper cross beam 33 to ensure that the front auxiliary supporting leg 22 avoids a rear wall and a bridge abutment of the tail hole pier top, as shown in fig. 4a and 4 b.
In the present invention, "front" or "rear" is defined as a direction that is the same as the direction of movement of the bridge girder erection machine 10 during the operation. In the process of returning and traveling, "front pier" refers to a pier which is positioned below the front half part of the bridge girder erection machine 10 along the returning direction of the bridge girder erection machine 10; the "rear pier" refers to a pier which is located below the rear half of the bridge girder erection machine 10 in the retraction direction of the bridge girder erection machine 10.
After the construction is completed, the bridge erecting machine 10 continues to move forward by the length of the guide beam and is positioned at the position of the beam to be erected. And then before the middle connection system of the bridge girder erection machine 10 spans the bridge abutment or the back wall, the lower connection cross is collided with the bridge abutment or the back wall, the lower connection cross is firstly removed and transported away, after passing through the bridge abutment or the back wall, profile steel is adopted for temporary connection, and then the erection and installation of the tail hole section beam are carried out.
Referring to fig. 5a and 5b, in this embodiment, after the installation of the end-hole section beam is completed, the hoisting crown block 11 is used to hoist and install two non-jacking connection systems 41 in the middle, the non-jacking connection systems 41 are connected with the main beam 13 of the bridge girder erection machine 10 by using high-strength bolts and flange plates, and the flange plate with bolt hole groups is fixedly connected with the main beam 13. For the curved section, in the retraction process of the bridge girder erection machine 10, in order to prevent the transformed non-jacking connection system 41 from colliding with the overhead line system and the car shelter platform, two rows of flange plate bolt holes are reserved in the direction of the transverse bridge, the non-jacking connection system 41 is installed to the maximum eccentricity of the inner side of the curve, and the non-jacking connection system 41 does not collide with the traveling of the hoisting crown block 11, as shown in fig. 6. After the installation is completed, the non-jacking connection system 41 is checked and accepted, and the related technical requirements need to be met. After the non-jacking connection system 41 is installed to be qualified, the transverse connection and the temporary connection in the old connection system are removed, then the bridge girder erection machine 10 runs backwards, and the hoisting crown block 11 is parked on the pier top in the opposite direction of the backward direction of the bridge girder erection machine 10 to serve as a balance weight.
After the above construction is completed, the bridge girder erection machine 10 retracts by a distance equal to the length of the guide beam, the front cross beam is positioned above the pier top, and at this time, the lifting connection system 42 is modified, as shown in fig. 7. And (4) formally carrying out retreating and hole passing on the bridge girder erection machine 10 after the transformation is finished until the short pier is retreated, and then carrying out the dismantling work of the bridge girder erection machine 10. The bridge girder erection machine 10 runs in the reverse direction of the beam erection. And adopting the spanning type backward movement, namely integrally disassembling and hoisting the bearing supporting leg 21 arranged on the rear pier to the advanced pier for installation by using the hoisting crown block 11, and then realizing the integral via hole backward movement of the bridge girder erection machine 10 under the joint pushing action of the longitudinal moving oil cylinders of the longitudinal and transverse moving trolleys of the front and rear bearing supporting legs 21.
In some embodiments, when the bridge erecting machine 10 retracts to the curved and circular-curve simple-supported beam section, the angle of the bridge erecting machine 10 during advancing is adjusted by the longitudinal-transverse trolley mounted on the load-bearing leg 21, and the non-jacking connection system 41 is finely adjusted along the transverse bridge direction, so that the bridge erecting machine 10 can smoothly retract to meet the minimum curve radius.
In the above embodiment, the modification of the jacking-connection system 42 before returning the running process comprises the following steps:
the rotationally open segment support beam 12;
unlocking the longitudinal restraint of the bridge girder erection machine 10;
driving the longitudinal moving oil cylinder of the longitudinal and transverse moving trolley to push the main frame of the bridge girder erection machine 10 to move longitudinally;
the rear auxiliary supporting legs are used as references, and when the rear auxiliary supporting legs can be folded to enter the beam gap, the bridge girder erection machine 10 stops longitudinally moving;
after the rear auxiliary supporting leg is stably jacked, a beam of the front auxiliary supporting leg 22 is dismantled by using a hoisting crown block 11;
welding a connecting flange seat of a newly-made jacking connecting system 42 at the position which is away from the rear part of the center of the beam of the original front auxiliary supporting leg 22;
the hoisting crown block 11 connects and screws the hoisting connection system 42 prefabricated in the factory and the welded connection flange seat by using a high-strength bolt;
the modified jacking connection system 42 is loaded in stages to finally confirm the reliability of the stress, as shown in fig. 8.
Referring to fig. 9 to 10, in the rollback walking, the specific steps of the via hole include:
the jacking connection system 42 jacks again, the front guide beam 31 and the bearing support leg 21 are separated, and simultaneously, the safety steel support is arranged on the outer side of the jack and is tightly plugged and tightly cushioned by a rubber plate or a cork plate;
dismantling the rear pier bearing support legs 21, and transporting the hoisting crown block 11 to the advanced pier; a hoisting crown block 11 is used for installing a leading pier bearing supporting leg;
the hoisting crown block 11 moves above the middle pier, meanwhile, the rear auxiliary supporting legs retract, the rear guide beam 32 falls on the bearing supporting legs 21 of the front pier, the jacking connecting system 42 retracts to empty, and at the moment, the guide beam is in a large cantilever state;
driving a longitudinal moving oil cylinder on the longitudinal and transverse moving trolley to push the main frame to move longitudinally, wherein in the longitudinal moving process of the step, the hoisting crown block 11 is always positioned above the middle pier and used as a balance weight;
longitudinally moving the whole machine to form a through hole, enabling the center of the main frame to coincide with the center of the bridge span, and returning the through hole to the position when the main frame is positioned at the beam erecting position, and checking all aspects to prepare the next through hole;
and repeating the steps until the bridge girder erection machine 10 returns to the position between the short piers, and then performing dismantling work.
It should be noted that the lower cross member 34 of the lower auxiliary support is removed before the bridge girder erection machine 10 passes through the hole.
The front guide beam support leg and the rear guide beam support leg are identical in structural form, the truck crane 1 is adopted to stand at the end parts of the front guide beam 31 and the rear guide beam 32 respectively, the front guide beam support leg and the rear guide beam support leg are hoisted and dismantled in sequence and placed on the ground, then all the parts of the front guide beam support leg and the rear guide beam support leg are dismantled and disassembled on the ground, and the parts are transported to a designated area by a flat car to be stacked, as shown in fig. 11a and 11 b.
Referring to fig. 12 to 13, before the guide beam is removed, a plurality of concrete movable pedestals or steel pedestals are provided at the lower portion of the guide beam. In the step of the embodiment that the truck crane 1 is adopted to be located at the end parts of the front and rear guide beams 32, and the front and rear support legs are hoisted and dismantled to be arranged on the ground, the guide beams are divided into the front guide beam 31 and the rear guide beam 32, the structural form is two I-shaped steel beam structural forms, the transverse connection is formed by splicing and welding buckled steel channels, and the single width is 2 sections in total. When the guide beam is dismounted, the front guide beam 31 and the rear guide beam 32 are sequentially and integrally dismounted in left and right breadth by utilizing the station position of the truck crane 1 and the lower parts of the front guide beam 31 and the rear guide beam 32, and the dismounted guide beam is arranged on the pedestal, so that the dismounting work of the guide beam on the ground is facilitated. In order to avoid the jam of the demolition site, the single guide beam is hoisted and demolished and then is timely disassembled on the ground, and the single guide beam is transported to a designated area by a flat car and stacked.
Referring to fig. 14, in the step of "removing the section supporting beams 12 by using the hoisting crane 11", the section supporting beams 12 are sequentially removed from a large mileage to a small mileage by using the hoisting crane 11 and placed on the ground, and after the removal is completed, the parts of the section supporting beams 12 are disassembled on the ground by the truck crane 1, and are transported to a designated area by using a flat car and stacked.
It should be noted that: the bridge girder erection machine 10 runs in a backspacing mode, and the backspacing running direction is opposite to the girder erection direction, so that the advancing direction of the bridge girder erection machine 10 during backspacing is a small mileage direction.
Referring to fig. 15, the hoisting crane 11 is a main working unit of the bridge girder erection machine 10, and is provided with a hoisting mechanism and a control and operation system. In this embodiment, the maximum lifting height of the lifting mechanism is 60m, the self weight of the crane crown block 11, the cart running mechanism and the metal structure is about 60 tons, and the total weight of the electric system, the crane trolley, the electric hoist and other accessory components is 54 tons.
In the process of dismantling the hoisting crown block 11, firstly, the truck crane 1 is adopted to dismantle the auxiliary components such as the electrical system, the hoisting trolley, the electric hoist and the like in sequence, and when dismantling the auxiliary components of the hoisting crown block 11, the hoisting crown block is directly placed on the flat car and pulled to a designated area for placement. And then the hoisting overhead traveling crane 11 is lifted and hoisted integrally to remove the large vehicle travelling mechanism and the metal structure by using two truck cranes 1, each component of the large vehicle travelling mechanism and the metal structure is decomposed and removed on the ground, and the components are transported to a designated area by using a flat car.
Referring to fig. 16, in the present embodiment, the main beam 13 has a double-layer steel box beam structure. Before the main beam 13 is dismantled, concrete pedestals 2 are laid on two sides of a pier position below the main beam 13, so that connecting bolts of the main beam 13 can be conveniently dismantled on the ground. Further, when the main beam 13 is dismantled, the truck crane 1 is used for dismantling the main beam 13 front and back transverse connection, sidewalks on two sides, guardrails and other auxiliary components, and the dismantled auxiliary components are transferred to a designated area for stacking. And then, the left and right main beams 13 are integrally and slowly lifted by using the two truck cranes 1, and the height of the main beams 13 is higher than that of the bearing leg trolley, for example, 10 cm. After the main beam 13 is placed on the pedestal, the main beam 13 is dismantled section by section on the ground by using an electric wrench, and the dismantled main beam 13 is transported to a designated area by a flat car to be stacked; and repeating the steps and detaching the other main beam 13.
Referring to fig. 17, the supporting legs 21 are used for supporting and jacking the whole bridge girder erection machine 10, and the bridge girder erection machine 10 is driven to act by the jacking cylinder, the transverse moving cylinder and the longitudinal moving cylinder arranged on the supporting legs. After each part of the main beam 13 is dismantled and transported out of the field, the truck crane 1 can be used for dismantling the ladder platform of the bearing support leg 21, the transverse moving oil cylinder, the longitudinal moving oil cylinder, the support rod trolley and the main body of the bearing support leg 21 in sequence, and locking members such as a restraint device among the parts.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (9)
1. A bridge girder erection machine dismantling method is characterized by comprising the following steps:
after the end hole section beam is erected, the bridge girder erection machine returns for the length distance of one guide beam, then the bridge girder erection machine is transformed, then the bridge girder erection machine returns to run, and the bridge girder erection machine is dismantled after returning to the low pier;
adopting truck cranes to respectively stand at the end parts of the front guide beam and the rear guide beam, and respectively hoisting and dismantling the front guide beam supporting leg and the rear guide beam supporting leg;
respectively dismantling the front guide beam and the rear guide beam;
dismantling the segment supporting beam by using a hoisting crown block;
dismantling a hoisting crown block by using a truck crane;
dismantling the main beam by using a truck crane; and
removing the bearing support legs and the longitudinally and transversely moving trolley by using a truck crane;
the method for improving the jacking connection system before returning and running comprises the following steps:
rotating open the segment support beam;
unlocking the longitudinal restraint of the bridge girder erection machine;
driving a longitudinal moving oil cylinder of the longitudinal and transverse moving trolley to push a main frame of the bridge girder erection machine to move longitudinally;
the rear auxiliary supporting leg is used as a reference, and when the rear auxiliary supporting leg can be folded to enter the beam seam, the bridge girder erection machine stops longitudinally moving;
after the rear auxiliary supporting leg is stably jacked, a hoisting crown block is used for dismantling a beam of the front auxiliary supporting leg;
welding a connecting flange seat of a new jacking connecting system at the position which is away from the rear part of the center of the beam of the original front auxiliary supporting leg;
the prefabricated jacking connection system and the welded connection flange seat are connected and screwed down by the hoisting crown block through high-strength bolts;
and carrying out graded loading on the transformed jacking connection system so as to finally confirm the stress reliability of the jacking connection system.
2. A bridge girder erection machine dismantling method according to claim 1, wherein: when the bridge girder erection machine runs in a retreating mode, the bearing support legs mounted on the rear piers are integrally disassembled and hoisted to the front piers for mounting through the hoisting crown block, and integral via hole longitudinal movement retreating of the bridge girder erection machine is achieved under the pushing action of longitudinal movement oil cylinders of the longitudinal and transverse movement trolleys of the bearing support legs.
3. A bridge girder erection machine dismantling method according to claim 1, wherein: when the bridge girder erection machine retreats to the curve simply supported girder section, the angle of the bridge girder erection machine in the advancing process is adjusted through the longitudinal and transverse moving trolley arranged on the bearing supporting legs, and meanwhile, the non-jacking connection system is finely adjusted along the transverse bridge direction, so that the bridge girder erection machine can smoothly retreat along the minimum curve radius.
4. A bridge girder erection machine dismantling method according to claim 1, wherein: and in the process of driving a longitudinal moving oil cylinder on the longitudinal and transverse moving trolley to push the main frame to move longitudinally, the hoisting crown block is always positioned above the middle pier to serve as a balance weight.
5. A bridge girder erection machine dismantling method according to claim 1, wherein: in the process of returning and running, the specific steps of via holes comprise:
the jacking connection system jacks again, and the front guide beam and the bearing support leg are disengaged; meanwhile, a safety steel support is arranged on the outer side of the jack and is tightly plugged and padded by a rubber plate or a cork plate;
dismantling the rear pier bearing support leg, transporting the hoisting crown block to the advanced pier, and installing the advanced pier bearing support leg by using the hoisting crown block;
the hoisting overhead traveling crane runs above the middle pier, meanwhile, the rear auxiliary supporting leg is retracted, the rear guide beam falls on the load-bearing supporting leg of the front pier, the jacking connection system is retracted and jacked to empty, and at the moment, the guide beam is in a large cantilever state;
driving a longitudinal moving oil cylinder on the longitudinal and transverse moving trolley to push the main frame to move longitudinally;
longitudinally moving the whole machine to form a through hole, enabling the center of the main frame to coincide with the center of the bridge span, and returning the through hole to the position when the main frame is positioned at the beam erecting position, and checking all aspects to prepare the next through hole;
and repeating the steps until the bridge girder erection machine returns to the position between the short piers, and then performing dismantling work.
6. A bridge girder erection machine dismantling method according to claim 1, wherein: and the lower cross beam of the lower auxiliary support is detached before the bridge girder erection machine passes through the hole.
7. A bridge girder erection machine dismantling method according to claim 1, wherein: before the guide beam is dismantled, a plurality of concrete movable pedestals or I-steel pedestals are arranged at the lower part of the guide beam.
8. A bridge girder erection machine dismantling method according to claim 1, wherein: before the main beam is dismantled, concrete pedestals are laid on two sides of a pier position below the main beam.
9. A bridge girder erection machine dismantling method according to claim 8, wherein: when the main beam is dismounted, the left main beam and the right main beam are integrally lifted by using the truck cranes, the two cranes turn the large arms step by step to enable the main beam to be in place on the concrete pedestal, and the two truck cranes hook down to enable the main beam to fall on the pedestal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110421847.7A CN113123246B (en) | 2021-04-20 | 2021-04-20 | Bridge girder erection machine dismantling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110421847.7A CN113123246B (en) | 2021-04-20 | 2021-04-20 | Bridge girder erection machine dismantling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113123246A CN113123246A (en) | 2021-07-16 |
| CN113123246B true CN113123246B (en) | 2022-08-30 |
Family
ID=76777826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110421847.7A Active CN113123246B (en) | 2021-04-20 | 2021-04-20 | Bridge girder erection machine dismantling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113123246B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114134817B (en) * | 2021-12-07 | 2023-05-30 | 中交二航局第二工程有限公司 | Dismounting method and mounting method of segment bridging machine |
| CN114541267B (en) * | 2022-03-04 | 2024-04-19 | 中铁一局集团建筑安装工程有限公司 | Bridge girder erection machine capable of automatically unloading girder |
| CN114892542B (en) * | 2022-06-16 | 2024-03-22 | 湖南科技大学 | Supporting method and device for straddle type monorail bridge girder erection machine |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3124038A1 (en) * | 1981-06-19 | 1983-01-13 | Philipp Holzmann Ag, 6000 Frankfurt | METHOD AND DEVICE FOR PRODUCING CONSTRUCTIONS LIKE BRIDGES WITH PRECAST CONCRETE BRACKETS |
| CN1609342A (en) * | 2004-11-25 | 2005-04-27 | 中铁大桥局集团有限公司 | Down beam type bridge-erecting machine and bridge erecting method thereof |
| EP1966444A2 (en) * | 2005-12-20 | 2008-09-10 | Flatiron Constructors, Inc. | Method and apparatus for bridge construction |
| JP2012180693A (en) * | 2011-03-02 | 2012-09-20 | Komaihaltec Inc | Removal method and new construction method for bridge |
| CN103243663A (en) * | 2013-05-03 | 2013-08-14 | 广东省长大公路工程有限公司 | Construction process for using bridge girder erection machine to remove T-shaped cantilever continuous rigid frame box girders |
| CN105625188A (en) * | 2016-01-13 | 2016-06-01 | 中铁三局集团有限公司 | Construction method for 48m sectional beam of passenger railway based on BIM technology |
| CN108374348A (en) * | 2018-04-24 | 2018-08-07 | 中铁工程机械研究设计院有限公司 | Adapt to the Bridge Erector steering method that wide formula beam car passes through |
| CN111139742A (en) * | 2019-12-26 | 2020-05-12 | 中铁十七局集团第三工程有限公司 | Method for mounting and dismounting highway bridge girder erection machine |
| CN112095473A (en) * | 2020-09-10 | 2020-12-18 | 中交第二航务工程局有限公司 | Double-guide-beam bridge girder erection machine turning method |
-
2021
- 2021-04-20 CN CN202110421847.7A patent/CN113123246B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3124038A1 (en) * | 1981-06-19 | 1983-01-13 | Philipp Holzmann Ag, 6000 Frankfurt | METHOD AND DEVICE FOR PRODUCING CONSTRUCTIONS LIKE BRIDGES WITH PRECAST CONCRETE BRACKETS |
| CN1609342A (en) * | 2004-11-25 | 2005-04-27 | 中铁大桥局集团有限公司 | Down beam type bridge-erecting machine and bridge erecting method thereof |
| EP1966444A2 (en) * | 2005-12-20 | 2008-09-10 | Flatiron Constructors, Inc. | Method and apparatus for bridge construction |
| JP2012180693A (en) * | 2011-03-02 | 2012-09-20 | Komaihaltec Inc | Removal method and new construction method for bridge |
| CN103243663A (en) * | 2013-05-03 | 2013-08-14 | 广东省长大公路工程有限公司 | Construction process for using bridge girder erection machine to remove T-shaped cantilever continuous rigid frame box girders |
| CN105625188A (en) * | 2016-01-13 | 2016-06-01 | 中铁三局集团有限公司 | Construction method for 48m sectional beam of passenger railway based on BIM technology |
| CN108374348A (en) * | 2018-04-24 | 2018-08-07 | 中铁工程机械研究设计院有限公司 | Adapt to the Bridge Erector steering method that wide formula beam car passes through |
| CN111139742A (en) * | 2019-12-26 | 2020-05-12 | 中铁十七局集团第三工程有限公司 | Method for mounting and dismounting highway bridge girder erection machine |
| CN112095473A (en) * | 2020-09-10 | 2020-12-18 | 中交第二航务工程局有限公司 | Double-guide-beam bridge girder erection machine turning method |
Non-Patent Citations (2)
| Title |
|---|
| 公路架桥机架设32m铁路T梁施工技术;李亚然;《黑龙江科技信息》;20091010(第28期);第280页 * |
| 浅谈LG900H型架桥机复杂工况架梁工艺;陈云凯;《建材与装饰》;20180504(第18期);第275-276页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113123246A (en) | 2021-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113123246B (en) | Bridge girder erection machine dismantling method | |
| US20220333320A1 (en) | Method for removal of temporary support system for road bridge pre-fabricated small box girder-type concealed bent cap, and equipment therefor | |
| CN110230261B (en) | Mounting construction method for upper frame beam of double-layer synchronous beam | |
| CN110886233A (en) | Construction method for connecting T-shaped beam with bridge | |
| CN106087768B (en) | A kind of method of the assembled mobile formwork in the narrow short transition time section of bridge tunnel | |
| CN113957793A (en) | Construction method for prefabricating box girder support in complex urban environment | |
| CN111455852A (en) | Assembling method of movable formwork for bridge construction | |
| CN109680614B (en) | Method and equipment for quickly transferring ultra-large bridge girder erection machine of assembled steel-concrete combined bridge | |
| CN112160773A (en) | Tunnel lining reinforcing steel bar trolley and lining reinforcing steel bar binding construction method | |
| CN116949946A (en) | Construction method for bridge bridging of small-radius curve bridge | |
| CN114319145B (en) | Bridge erection method using bridge girder erection machine | |
| CN111705682A (en) | Construction method and equipment for removing and rebuilding superstructure of widened bridge across electrified railway | |
| CN114508052A (en) | Pier-beam assembly type integrated construction method | |
| CN111139742B (en) | Method for mounting and dismounting highway bridge girder erection machine | |
| CN114352323A (en) | Tunnel steel lining installation system and construction method | |
| CN210530862U (en) | Tunnel construction trolley | |
| CN112458912A (en) | Walking type trolley and installation method and construction method thereof | |
| CN114277688B (en) | Bridge girder erection machine | |
| CN111877173A (en) | Long-distance rapid transition method for bridge girder erection machine | |
| CN213328635U (en) | Rail-crossing trestle | |
| CN219469482U (en) | Auxiliary transverse movement device for reconstruction of river side main beam of bank container crane | |
| CN214005464U (en) | Structure is demolishd fast to multilayer interchange ramp bridge steel hanging beam and concrete cantilever section | |
| CN214939311U (en) | Prefabricated bridge pier and beam integrated bridge girder erection machine | |
| CN219671101U (en) | Steering structure of bridge girder erection machine assisted by ramp bridge with narrow section and small curve radius | |
| CN117604910A (en) | Method for installing bridge girder erection machine at tunnel portal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |