CN111851307A - Large-span prefabricated assembly type corrugated web combined box girder transportation frame construction method - Google Patents
Large-span prefabricated assembly type corrugated web combined box girder transportation frame construction method Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 50
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 239000000725 suspension Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 5
- 238000005192 partition Methods 0.000 claims abstract description 4
- 230000032258 transport Effects 0.000 claims description 45
- 241000282836 Camelus dromedarius Species 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 3
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- 241001456553 Chanodichthys dabryi Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
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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
- E01D19/00—Structural or constructional details of bridges
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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Abstract
A construction method for a large-span prefabricated assembly type corrugated web combined box girder transport frame comprises the following steps: modularizing the module transport vehicles to form a set of combined module transport vehicle (1), wherein the total width is the width of two beams; secondly, mounting the corrugated steel web plate combined box girder on a hump beam (2) of the combined module transport vehicle (1); thirdly, conveying the corrugated steel web plate combined box girder to a tail girder feeding area of the bridge girder erection machine (4); fourthly, erecting the full-width beam body by using a bridge erecting machine (4); and fifthly, installing the reinforcing steel bars at the positions of the transverse partition plate and the top plate between the adjacent beam bodies, and installing and pouring concrete by using the suspension template. The method solves the problems of transportation and whole-hole erection of the large-span prefabricated assembled corrugated web combined box girder by using mechanical equipment, opens up a new way for mechanized construction of the assembled steel-concrete combined bridge, and promotes application of the more economical large-span prefabricated assembled corrugated steel web girder.
Description
Technical Field
The invention relates to the technical field of prefabricated bridge construction, in particular to a construction method for a large-span prefabricated corrugated web combined box girder transport frame.
Background
At present, domestic large-span corrugated steel web composite beam bridges are all of suspension cable, cable-stayed and continuous rigid frame bridge types. The wave-shaped steel web composite beam bridge is the most economical beam type in a prefabricated assembled bridge with the span of 40-60m, compared with the traditional beam bridge, the wave-shaped steel web composite beam bridge fully utilizes the advantages of the corrugated steel plate, such as high compressive strength of concrete and high shear yield strength of the wave-shaped steel web, effectively combines three materials of steel, concrete and prestress, and can improve the use efficiency of the materials and reduce the construction cost. However, the corrugated steel web composite beam bridge at home and abroad mainly adopts construction modes such as support cast-in-place, basket hanging cantilever casting or pushing and the like, the construction process is complex, the material consumption is large, and the field operation is more. The prefabricated corrugated steel web bridge is mostly erected by a crane. Therefore, how to transport and mechanically erect the prefabricated and assembled large-span corrugated steel web composite beam bridge in a whole hole is particularly urgent, so that the resource and energy are saved, the construction pollution is reduced, the construction cost is reduced, and the labor productivity and the quality safety level are improved.
At present, the construction method for the large-span prefabricated assembly type corrugated beam transportation frame is rarely described in China, for example, the Chinese patent 'construction method for the assembly type corrugated steel inclined web plate combined beam' (application number 201410201710.0) discloses that when the assembly type corrugated steel inclined web plate combined beam is erected, a bridge abutment or a bridge pier is firstly constructed, a temporary support is erected, two prefabricated corrugated steel inclined web plate boundary beams are hoisted to a support system in a subsection mode, reinforcing steel bars are connected, a longitudinal wet joint between the two boundary beams and a top plate flange plate are cast, the combined beam with a wide box beam structure is formed, and an integral section is formed. And after the concrete wet joint to be poured reaches a certain strength value, dismantling the support to complete system conversion, and finishing construction. The disadvantages of this approach are: the construction method has the advantages that the number of beam sections is large, the construction needs to be carried out by erecting temporary supports on site at each bridge crossing position, after the beam sections are erected, reinforcing steel bars of a bottom plate and a top plate are bound on a support system, and concrete is poured. And the transportation mode and the erection of the bridge crane are not described.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a construction method for a large-span prefabricated assembly type corrugated web combined box girder transport frame. The method solves the problems of transportation and whole-hole erection of the large-span prefabricated assembled corrugated web combined box girder by using mechanical equipment, opens up a new way for mechanized construction of the assembled steel-concrete combined bridge, and promotes application of the more economical large-span prefabricated assembled corrugated steel web girder.
In order to achieve the purpose, the invention provides a construction method for a large-span prefabricated assembled corrugated web combined box girder transport frame, which comprises the following steps:
the method comprises the following steps that firstly, modular combination is carried out on module transport vehicles, four module transport vehicles are combined into a set of combined module transport vehicle, and the total width of the combined module transport vehicle is the width of two beams;
secondly, mounting the corrugated steel web plate combined box girder on a humpback beam of the combined module transport vehicle, and firmly bundling the box girder;
step three, the combined module transport vehicle transports the corrugated steel web combined box girder to a tail girder feeding area of the bridge girder erection machine in a walking single-width transport mode;
fourthly, erecting the full-width beam body by using a bridge erecting machine; the support legs of the bridge girder erection machine do not need to move, and the whole hole girder body is erected through the movement of the crown block and the main truss;
and fifthly, installing the reinforcing steel bars at the positions of the transverse partition plate and the top plate between the adjacent beam bodies, and installing and pouring concrete by using the suspension template. Therefore, a support does not need to be erected, the field workload is small, and the bridge forming speed is high.
Preferably, in the second step, the camel beam is formed into a box shape by assembling and welding section steel and is transported with the combined module
The connecting part of the transport vehicle is a balance shaft. The hump beam can rotate properly through the balance shaft within a certain range, and the hump beam can adapt to the stability of a beam body during transportation under different longitudinal slope conditions.
In any of the above schemes, preferably, in the third step, the combined module transport vehicle travels on two beams on which the beam body is erected, and the tire running track is the position of the beam rib; the bearing capacity of the beam rib position of the box girder is large, and the structure is safer.
In any of the above schemes, preferably, in the fourth step, the frame beams are an inner edge beam, an outer edge beam and a middle beam in sequence.
In any of the above schemes, preferably, in the fourth step, when the inner side beam is erected, the crane issues the lifting appliance to connect and lift the beam body, so as to complete the erection of the beam body.
In any of the above schemes, preferably, in the fourth step, when the outer beam is erected, a temporary support is installed at the middle beam, wherein the top surface of the temporary support is higher than the height of the designed stop block at the top of the abutment. And the crane down-sending lifting appliance is connected with the beam body of the outer side beam, lifted and temporarily stored at the middle beam.
In any of the above schemes, preferably, in the fourth step, the crown block is unlocked and then returns to the original position with the body of the outer beam, the main girders on the left and right sides of the bridge girder erection machine synchronously move transversely, and when the main girders reach the position right above the temporarily stored outer beam, the main girders are stopped, and the main girders are provided with the suspension devices, connected with the body of the outer beam and lifted; and the main truss is transversely moved again, and is stopped after the main truss is moved to the designed position of the outer side beam, and the suspension device is lowered to the designed height of the beam body to complete the beam body erection of the outer side beam.
In any of the above schemes, preferably, in the fourth step, the erection of the middle beam is completed by a crown block; if a bridge with a plurality of middle beams is needed to be erected, the middle beams can be erected by using a crown block, and the last middle beam adjacent to the outer edge beam is erected finally. The problem of when must use the overhead traveling crane hoist and mount to erect the boundary beam, the bridge crane landing leg crossbeam transverse dimension need design enough length, main purlin sideslip is too much to cause poor stability is solved. The mode improves the transverse load overturning resistance of the bridge crane and ensures the safety.
The invention has the beneficial effects that:
1. the invention fully utilizes the characteristic of quick combination of the module vehicle, has stronger bearing capacity after combination, better stability, large total grounding area of the tire and low requirement on the bearing capacity of a transportation channel. When the large-span precast beam is transported, the balance shaft of the camel beam can rotate in a certain range, and the transportation requirements under different longitudinal slope conditions are met. The whole beam body is transported to the bridge position in a way of transporting the beam on a half-width beam by walking, and the tire walking track is the beam rib position of two beams, so that the stress influence on the bridge structure is small.
2. Most bridge positions of bridges have no large-tonnage vehicle transportation condition, a traditional support is erected, and the crane is used for hoisting sections and has high requirements on foundations at the bridge positions. The invention adopts the mode of transporting the beams on the beams to have no requirements on the landform and the landform under the bridge position, thereby solving the transportation problem. In addition, the invention fully utilizes the transverse moving mode of the crown block and the main girder of the bridge girder erection machine to erect the whole-hole precast beam, the supporting legs do not need to move, the safety of the bridge girder erection machine is better, the erection efficiency can be improved, and a new technical idea is provided for the bridge type beam slab erection of the similar small cantilever edge beam.
3. The conventional large-span prefabricated beam sectional hoisting process needs to erect a support on site and then connects a top plate and a bottom plate of a beam body to form an integral structure, and is long in site operation time, large in workload and high in potential safety hazard. The whole-hole erection is adopted, so that the construction progress can be effectively accelerated, and the safety risk is reduced. The construction method solves the technical problem of whole-hole erection construction of the large-span fabricated corrugated steel web combined box girder, and provides the frame transporting construction method of the large-span prefabricated corrugated steel web combined box girder which is more suitable for crossing rivers, roads and bridge positions and is unsuitable for large vehicles to pass through.
4. The invention can be applied to bridges and municipal works without shipping conditions, and the corrugated steel web box girder is transported to the bridge site in a whole hole mode by adopting a girder transporting mode on the girder in the transportation process, so that the stress damage to the existing erected girder is avoided, the whole hole erection is carried out by transversely moving the bridge girder erection machine, the field workload is reduced, and the mechanized construction level of the prefabricated corrugated steel web bridge is greatly improved.
5. The transportation and erection process implemented by the invention transports the large-span corrugated steel web box girder to the tail part of the bridge girder erection machine by applying the combined module vehicle to transport the girder on a single two-piece girder, thereby avoiding the mass damage of the bridge caused by concentrated stress when the girder vehicle travels on the erected girder. The erection problem of the whole-hole outer edge beam is solved by utilizing the transverse moving of the main truss of the bridge girder erection machine and the hoisting function, and a new technology is developed for the rapid erection of the transportation of the large-span prefabricated assembly type wave-shaped beam.
Drawings
FIG. 1 is a cross-sectional view of a combined modular transport vehicle used in the construction method of the large-span prefabricated assembled corrugated web combined box girder transportation frame according to the invention;
FIG. 2 is a schematic view of an upper beam of a combined type module transport vehicle beam of the construction method for the large-span prefabricated assembled corrugated web combined box beam transportation frame according to the invention;
FIG. 3 is a schematic diagram of a corrugated steel web box girder feeding beam of the large-span prefabricated assembled corrugated web combined box girder transportation and erection construction method according to the invention;
FIG. 4 is a schematic diagram of a bridge girder erection machine for hoisting corrugated steel web box girders according to the construction method for transporting and erecting the large-span prefabricated corrugated web combined box girder;
fig. 5-1 is a schematic view of the outer side beam temporarily stored at the position of the middle beam in the construction method for the large-span prefabricated assembled corrugated web combined box beam transportation frame according to the invention;
FIG. 5-2 is a detail view of the outer side beam temporarily stored in the middle beam position according to the construction method of the large-span prefabricated assembled corrugated web combined box beam transportation frame of the invention;
FIG. 6-1 is a schematic diagram of the connection between the main truss of the bridge girder erection machine and the outer side girder after the main truss of the bridge girder erection machine traverses according to the construction method for transporting the large-span prefabricated assembled corrugated web combined box girder;
FIG. 6-2 is a detailed view of a connecting structure between a main truss of a bridge girder erection machine and an outer side girder after the main truss of the bridge girder erection machine traverses according to the construction method for transporting the large-span prefabricated assembled corrugated web combined box girder;
FIG. 7-1 is a schematic diagram of the transverse installation of the outer side beam by the main truss of the bridge girder erection machine in the construction method for transporting and erecting the large-span prefabricated assembled corrugated web combined box girder according to the invention;
fig. 7-2 is a detailed view of the transverse movement and beam falling of the outer beam by the main truss of the bridge girder erection machine in the construction method for transporting and erecting the large-span prefabricated assembled corrugated web combined box beam according to the invention.
Wherein, 1, the combined module transport vehicle; 2. a bow beam; 3. a balance shaft; 4. a bridge girder erection machine; 5. a crown block; 6. a main girder; 7. a spreader; 8. a temporary support; 9. designing a stop block; 10. a suspension device.
Detailed Description
The technical solutions of the present application will be described in detail below with reference to the drawings and the detailed description of the present application, but the following examples are only for understanding the present invention, and the examples and features of the examples in the present application can be combined with each other, and the present application can be implemented in various different ways as defined and covered by the claims.
Taking a bidirectional six-lane yellow river grand bridge engineering as an example, technical explanation is carried out. The north approach bridge and the south approach bridge in the dike are prefabricated corrugated steel web plate combined box girders and 6 girders in total with a single hole, the span of the single girder is 50 meters, and the weight of the girder is 380 tons.
According to the actual conditions of the project and the requirements of the construction period, the following problems are mainly solved in the construction: the span of the precast beam slab is large, the maximum longitudinal slope of the bridge is 2.65%, the pier position of the bridge is completely positioned in a yellow river beach, the underground water level is high, and large-tonnage hoisting and transporting equipment cannot pass through. The length of the single-sheet corrugated steel web combined box girder is 50 meters, the weight is 380 tons, and the whole hole erection difficulty is large.
The construction method for the large-span prefabricated assembled corrugated web combined box girder transport frame comprises the following steps:
firstly, the modular transport vehicle is modularly combined, as shown in fig. 1.
The module transport vechicle has the rapid Assembly function, and four module transport vechicles pass through hydraulic system and electrical system and make up into one set of combination formula module transport vechicle 1, and combination formula module transport vechicle 1 projection is the rectangle, and overall length and width adjust as required to enumerate the engineering as an example, and total width is 8.5 meters, can stride two roof beams walking simultaneously. The top of the combined module transport vehicle 1 is provided with a camel beam 2 for bearing and fixing the box girder.
And step two, mounting the corrugated steel web plate combined box girder on the hump beam 2 of the combined type module transport vehicle 1 by using a girder lifting machine in a girder factory. The hump beam 2 is formed into a box shape by assembling and welding profile steels, the connecting part of the hump beam 2 and the combined type module transport vehicle 1 is a balance shaft 3 which can rotate properly within a certain range so as to adapt to the stability of a beam body during transportation under different longitudinal slope conditions, as shown in figures 1 and 2.
And step three, transporting the beam on the beam. The combined type module transport vehicle 1 transports the corrugated steel web combined box girder to a tail part girder feeding area of the bridge girder erection machine 4 by adopting a single walking transport track. The combined type module transport vehicle 1 walks on two beams of which the beam bodies are erected, and the running track of tires is the position of a beam rib, so that the stress safety of a bridge structure is ensured, as shown in figure 2.
And fourthly, erecting the full-width beam body by using the bridge erecting machine 4.
The supporting legs of the bridge girder erection machine 4 do not need to move, and the whole-hole girder body erection is completed through the crown block 5 and the main truss 6. The frame beam comprises an inner edge beam, an outer edge beam and a middle beam in sequence.
The erection of the inner edge beam is shown in fig. 3 and 4.
When the inner side beam is erected, the crown block 5 issues a lifting appliance 7 to be connected with and lifted by the beam body, and the erection of the beam body is completed. After the inner edge beam is erected, a safety channel for the front and back walking operation of personnel is provided. As shown in fig. 3 and 4.
When the outer edge beam is erected, the temporary support 8 is installed at the middle beam part, wherein the top surface of the temporary support 8 is higher than the height of the design stop block 9 at the top of the abutment. And a crane 5 issues a lifting appliance 7 to be connected with the beam body, lifts and temporarily stores the beam body at the position of the middle beam. As shown in fig. 5-1 and 5-2.
The crown block 5 and the girder body are unlocked and then reset, the main girders 6 on the left side and the right side of the bridge girder erection machine 4 synchronously move transversely, the main girders 6 stop moving right above the temporarily stored outer girder, and the main girders 6 are provided with suspension devices 10, connected with the girder body and lifted properly, as shown in fig. 6-1 and 6-2.
And the main truss 6 is transversely moved again, and is stopped after the main truss 6 is moved to the designed position of the outer side beam, and the suspension device 10 is lowered to the designed height to complete the erection of the beam body. As shown in fig. 7-1 and 7-2.
The middle beam is erected through the crown block 5, and if a bridge with a plurality of beam bodies needs to be erected, the crown block 5 can be used for completely erecting the middle beam, and finally the middle beam adjacent to the outer beam is erected.
And fifthly, connecting and installing the transverse partition plates between the adjacent beam bodies and the steel bars at the top plate positions, and installing the suspension formworks and pouring concrete.
The invention fully utilizes the characteristic of quick combination of the module vehicle, has stronger bearing capacity after combination, better stability, large total grounding area of the tire and low requirement on the bearing capacity of a transportation channel. When the large-span precast beam is transported, the balance shaft of the camel beam can rotate in a certain range, and the transportation requirements under different longitudinal slope conditions are met. The whole beam body is transported to the bridge position in a way of transporting the beam on a half-width beam by walking, and the tire walking track is the beam rib position of two beams, so that the stress influence on the bridge structure is small.
The invention adopts the mode of transporting the beams on the beams to have no requirements on the landform and the landform under the bridge position, thereby solving the transportation problem. In addition, the invention fully utilizes the transverse moving mode of the crown block and the main girder of the bridge girder erection machine to erect the whole-hole precast beam, the supporting legs do not need to move, the safety of the bridge girder erection machine is better, the erection efficiency can be improved, and a new technical idea is provided for the bridge type beam slab erection of the similar small cantilever edge beam.
The whole-hole erection is adopted, so that the construction progress can be effectively accelerated, and the safety risk is reduced. The construction method solves the technical problem of whole-hole erection construction of the large-span fabricated corrugated steel web combined box girder, and provides the frame transporting construction method of the large-span prefabricated corrugated steel web combined box girder which is more suitable for crossing rivers, roads and bridge positions and is unsuitable for large vehicles to pass through.
The invention can be applied to bridges and municipal works without shipping conditions, and the corrugated steel web box girder is transported to the bridge site in a whole hole mode by adopting a girder transporting mode on the girder in the transportation process, so that the stress damage to the existing erected girder is avoided, the whole hole erection is carried out by transversely moving the bridge girder erection machine, the field workload is reduced, and the mechanized construction level of the prefabricated corrugated steel web bridge is greatly improved.
The transportation and erection process implemented by the invention transports the large-span corrugated steel web box girder to the tail part of the bridge girder erection machine by applying the combined module vehicle to transport the girder on a single two-piece girder, thereby avoiding the mass damage of the bridge caused by concentrated stress when the girder vehicle travels on the erected girder. The erection problem of the whole-hole outer edge beam is solved by utilizing the transverse moving of the main truss of the bridge girder erection machine and the hoisting function, and a new technology is developed for the rapid erection of the transportation of the large-span prefabricated assembly type wave-shaped beam.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (8)
1. A construction method for a large-span prefabricated assembly type corrugated web combined box girder transport frame is characterized by comprising the following steps:
the method comprises the following steps that firstly, modular combination is carried out on module transport vehicles, four module transport vehicles are combined into a set of combined module transport vehicle (1), and the total width of the combined module transport vehicle (1) is the width of two beams;
secondly, mounting the corrugated steel web plate combined box girder on a hump beam (2) of the combined module transport vehicle (1) and firmly bundling the box girder;
step three, the combined module transport vehicle (1) transports the corrugated steel web combined box girder to a tail girder feeding area of the bridge girder erection machine (4) in a walking single-width transport mode;
fourthly, erecting the full-width beam body by using a bridge erecting machine (4); the support legs of the bridge girder erection machine (4) do not need to move, and the whole hole girder body is erected by the movement of the crown block (5) and the main truss (6);
and fifthly, installing the reinforcing steel bars at the positions of the transverse partition plate and the top plate between the adjacent beam bodies, and installing and pouring concrete by using the suspension template.
2. The construction method for the large-span prefabricated corrugated web combined box girder according to claim 1, wherein in the second step, the camel beam (2) is formed into a box shape by assembling and welding section steels, and the connecting part of the camel beam and the combined type module transport vehicle (1) is a balance shaft (3).
3. The construction method for carrying and erecting the large-span prefabricated assembled corrugated web combined box girder according to any one of claims 1-2, wherein in the third step, the combined module transport vehicle (1) walks on two girders of which the girder body is erected, and the running track of the tire is the position of a girder rib.
4. The construction method for transporting and erecting the large-span prefabricated assembled corrugated web combined box girder according to any one of claims 1 to 3, wherein in the fourth step, the erecting beams are an inner edge beam, an outer edge beam and a middle beam.
5. The construction method for the large-span prefabricated corrugated web combined box girder according to claim 4, wherein in the fourth step, a crane (5) issues a lifting appliance (6) to be connected with and lifted by a girder body when the inner side girder is erected, so that the erection of the girder body is completed.
6. The construction method for the large-span prefabricated assembled corrugated web combined box girder according to one of claims 1 to 5, wherein in the fourth step, when the outer side girders are erected, temporary supports (8) are installed at the positions of the middle girders, wherein the top surfaces of the temporary supports (8) are higher than the height of design stoppers (9) at the tops of the abutments; and a crane (5) issues a lifting appliance (6) to be connected with the beam body of the outer beam, lifts and temporarily stores the beam body at the middle beam.
7. The construction method for transporting and erecting the large-span prefabricated corrugated web combined box girder according to claim 6, wherein in the fourth step, the overhead traveling crane (5) is unlocked and then returns to the position with the girder body of the outer side girder, the main girders (6) on the left side and the right side of the bridge girder erection machine (4) synchronously move transversely, and when the main girders (6) are stopped right above the temporarily stored outer side girder, the main girders (6) are provided with suspension devices (10) which are connected with the girder body of the outer side girder and lift; and the main truss (6) is transversely moved again, and the main truss (6) stops moving after moving to the designed position of the outer edge beam, and the suspension device (10) is placed down to the designed height of the beam body to complete the beam body erection of the outer edge beam.
8. The construction method for the transportation and erection of the large-span prefabricated corrugated web combined box girder according to claim 7, wherein in the fourth step, the erection of the middle girder is completed through an overhead traveling crane (5); if a bridge with a plurality of middle beams is needed to be erected, the middle beams can be erected by using the overhead travelling crane (5), and the last middle beam adjacent to the outer edge beam is erected finally.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112853997A (en) * | 2021-02-05 | 2021-05-28 | 中交一公局集团有限公司 | Construction method of large-span steel-concrete bridge |
| CN113373816A (en) * | 2021-06-30 | 2021-09-10 | 湖南路桥建设集团有限责任公司 | Construction method for hoisting corrugated steel web segment beam |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113373816A (en) * | 2021-06-30 | 2021-09-10 | 湖南路桥建设集团有限责任公司 | Construction method for hoisting corrugated steel web segment beam |
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