CN112627059A - Pier-beam integrated bridge girder erection machine and via hole construction method - Google Patents
Pier-beam integrated bridge girder erection machine and via hole construction method Download PDFInfo
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- CN112627059A CN112627059A CN202011519881.XA CN202011519881A CN112627059A CN 112627059 A CN112627059 A CN 112627059A CN 202011519881 A CN202011519881 A CN 202011519881A CN 112627059 A CN112627059 A CN 112627059A
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- supporting leg
- cross beam
- pier
- leg
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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
- E01D21/10—Cantilevered 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
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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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
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Abstract
The invention provides a pier-beam integrated bridge girder erection machine and a via hole construction method, belonging to the technical field of bridge erection. The main beam is installed in the vertical guide beam below, and the crossbeam meets with vertical guide beam, and the overhead traveling crane is installed on the crossbeam, and the landing leg device is all installed in the main beam below. The supporting legs are provided with carrier roller assemblies and hanging assemblies, the carrier roller assemblies drive the main beams to move in the front-rear direction, and the hanging assemblies drive the supporting legs to move in the front-rear direction. According to the invention, the pier stud and the split type bent cap in the span are installed firstly, then the hole passing operation is carried out until the next span is reached, the pier stud and the bent cap are hoisted, the operation is carried out in a circulating reciprocating manner, the pier stud and the split type bent cap in the whole line are installed by using a bridge erecting machine, the problem of long waiting time for wet connection of the split type bent cap is solved, and the construction efficiency is high. The hoist and mount operation of pier stud, bent cap and case roof beam also can be accomplished in the not good operation region of ground bearing capacity, need not to consolidate the ground, and construction cost is low, and the safety risk is low.
Description
Technical Field
The invention belongs to the technical field of bridge erection, and particularly relates to a pier-beam integrated bridge girder erection machine and a via hole construction method.
Background
The bridge prefabricated part is an advanced process form in the municipal highway bridge construction process, is finished by adopting factory prefabrication processing, and is more energy-saving and environment-friendly. Traditional bridge prefabricated component installation hoist and mount adopt truck crane or crawler crane to go on mostly, require great to the ground bearing capacity, require to the place of business turn over more strictly, and the restriction factor is more. Because the temporary land range for municipal highway bridge construction is less, hoisting safety accidents easily occur in the construction process, and the problem is difficult to remedy once occurring.
The existing pier-beam integrated bridge girder erection machine can integrate the lifting of pier columns, cover beams and box girders into a whole, the single machine can finish the lifting operation of corresponding prefabricated parts, the traditional truck crane and crawler crane lifting machinery are replaced, a large number of lifting fields are not required to be occupied, and the sequential operation of firstly mounting the pier columns, then mounting the cover beams and finally mounting the box girders can be finished on a bridge floor.
However, the general bent cap designs are all bigger and heavier, and in order to facilitate the prefabrication, transportation and installation, the split bent cap is adopted, namely, one bent cap is divided into two and a half pieces, and the wet welding operation is carried out after the split lifting. After wet connection, the box girder erection operation can be carried out only after the concrete strength meets the requirement, and the waiting time is dozens of days. When the existing pier-beam integrated bridge girder erection machine is used for carrying out span-by-span construction operation, the installation sequence of firstly pier columns, then capping beams and finally box beams is adopted, the span-by-span erection needs about two months, the construction efficiency is extremely low, and the requirement of modern construction cannot be met. Therefore, there is a need for an efficient and safe bridge girder erection machine.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a pier-beam integrated bridge girder erection machine and a via hole construction method, wherein the pier-beam integrated bridge girder erection machine comprises four sets of supporting leg devices, a main beam and the supporting leg devices are respectively pushed to move by utilizing a carrier roller assembly and a hanging assembly, a pier column and a split type cover beam are firstly installed, then via hole operation is carried out, and cyclic reciprocating installation is carried out, so that the via hole construction of all-line pier column and cover beam components is completed, the problem of long waiting time of wet connection of the split type cover beam is solved, and the construction efficiency is improved.
The present invention achieves the above-described object by the following technical means.
A pier-beam integrated bridge girder erection machine comprises a longitudinal guide beam, a main beam, a crown block, four sets of leg devices and a cross beam, wherein the cross beam is connected with the longitudinal guide beam; the four sets of supporting leg devices comprise a No. 1 supporting leg, a No. 2 supporting leg, a No. 3 supporting leg and a No. 4 supporting leg, wherein the No. 1 supporting leg is used as a front end support for hanging and moving forwards of the No. 2 supporting leg, the No. 3 supporting leg and the No. 4 supporting leg and is arranged above the roadbed bearing platform, and the No. 2 supporting leg, the No. 3 supporting leg and the No. 4 supporting leg are respectively arranged above the split type cover beam;
the four sets of leg devices respectively comprise two working states, namely a fixed state and a moving state; when the No. 1 supporting leg is in a fixed state, the lower end of the No. 1 supporting leg is anchored with the pre-buried finish rolling deformed steel bar of the roadbed bearing platform, and when the No. 2 supporting leg, the No. 3 supporting leg and the No. 4 supporting leg are in a fixed state, the lower ends of the No. 2 supporting leg, the No. 3 supporting leg and the No. 4 supporting leg are anchored with the corresponding cover.
Furthermore, the No. 1 support leg comprises a first lower cross beam connected with the bottom of the main beam, the bottom of the first lower cross beam is connected with a second lower cross beam through an upright post, and an inclined strut is arranged between the first lower cross beam and the second lower cross beam; a first bottom cross beam is arranged below the second lower cross beam, and a lifting device is arranged between the second lower cross beam and the first bottom cross beam; the bottom of the first bottom cross beam is provided with a spiral adjusting device and an anchoring steel plate, and when the No. 1 supporting leg is in a fixed state, finish rolling deformed steel bars are reserved through the anchoring steel plate and a roadbed bearing platform to perform temporary anchoring.
Furthermore, the No. 2 supporting leg comprises carrier roller assemblies symmetrically arranged below the main beam, and a hanging assembly is arranged above the carrier roller assemblies; the lower part of the carrier roller assembly is arranged on a chassis through a hinged support, and the chassis is arranged at two ends of the upper surface of the third lower cross beam; a second bottom cross beam is arranged below the third lower cross beam, and a lifting device is arranged between the third lower cross beam and the second bottom cross beam; four connecting seats are installed to second bottom crossbeam bottom, and the connecting seat bottom all is equipped with the anchor bolt hole, and when No. 2 landing legs were in fixed state, the finish rolling screw-thread steel through connecting seat and bent cap top carries out interim anchor.
Furthermore, the No. 3 supporting leg comprises a carrier roller assembly, a hanging assembly, a chassis, a lifting device and a connecting seat, wherein the structure and the installation position of the carrier roller assembly are the same as those of the No. 2 supporting leg; the No. 3 supporting leg also comprises a fourth lower cross beam and a third bottom cross beam, wherein the structure and the installation position of the fourth lower cross beam are the same as those of the third lower cross beam, and the structure and the installation position of the third bottom cross beam are the same as those of the second bottom cross beam; the quantity of each part is half in No. 2 landing legs in No. 3 landing legs, installs oblique support post between No. 3 landing legs and the bent cap upper surface.
Further, hang the assembly and can drive No. 2 landing legs, No. 3 landing legs and move in the fore-and-aft direction, the bearing roller assembly can drive the girder and move in the fore-and-aft direction.
Further, No. 4 landing legs are including the fifth bottom end rail that is arch support body structure, and the fifth bottom end rail both ends are connected with elevating gear through the free bearing, and the elevating gear other end is connected with the girder, and the section of heightening is installed to fifth bottom end rail bottom, heightens the section bottom and installs the base, and the base bottom is equipped with the anchor bolt hole, and when No. 4 landing legs were in fixed state, carry out interim anchor through the finish rolling screw-thread steel of base and bent cap top.
Furthermore, the diameter of finish-rolled deformed steel bar used for temporary anchoring is 32mm, each anchoring point adopts 8 finish-rolled deformed steel bars, and the left side and the right side of the anchoring points are respectively anchored; the upper surface of the bent cap is provided with a connecting pier cushion stone and a middle pier cushion stone.
Furthermore, the lifting device comprises an outer guide sleeve, an inner guide pillar is arranged in the outer guide sleeve, the outer guide sleeve is connected with the hydraulic oil cylinder, and the outer guide sleeve can do lifting motion along the inner guide pillar; and lithium-based lubricating grease is coated on the outer guide sleeve and the inner guide post during installation.
Furthermore, core discs for angle adjustment are mounted on the No. 2, the No. 3 and the No. 4 supporting legs; all structural components in the bridge girder erection machine are made of Q355C low-alloy structural steel through welding.
The method for carrying out via hole construction by using the bridge girder erection machine comprises the following steps:
step 1: after the pier stud and the capping beam in the span are installed, the carrier roller and the main beam anchoring device are loosened to prepare a via hole, at the moment, the capping beam is only grouted, and wet connection is not carried out between the two capping beams;
step 2: anchoring the No. 2 supporting leg above a cover beam on the No. 1 supporting leg roadbed bearing platform, and stopping the crown block above the No. 2 supporting leg;
and step 3: the No. 1 supporting leg is released and lifted to a position which is 500mm above the ground;
and 4, step 4: pushing the main beam to move forward for 9.6m by using the carrier roller assembly, wherein the overhead travelling crane synchronously moves backward and keeps the relative position with the No. 2 supporting leg still in the process;
and 5: the No. 3 supporting leg is released, and the No. 4 supporting leg is anchored on the bent cap anchored by the No. 3 supporting leg;
step 6: pushing the No. 3 supporting leg to move forwards for 30m by using the hanging assembly, reaching the upper part of the cover beam between the No. 2 supporting leg and the No. 4 supporting leg, and anchoring;
and 7: the No. 4 supporting leg is emptied, the main beam is pushed to move forward for 10m by using the carrier roller assembly, and in the process, the crown block synchronously moves backward and keeps the relative position with the No. 2 supporting leg still;
and 8: moving the crown block to the position above the No. 3 supporting leg;
and step 9: pushing the main beam to move forward by 11m by using the carrier roller assembly, wherein the overhead travelling crane synchronously moves backward and keeps a relative position with the No. 3 supporting leg still in the process; then anchoring the No. 1 supporting leg on the corresponding roadbed bearing platform below the No. 1 supporting leg, and completing the via hole;
step 10: and (4) mounting the pier columns and the split type bent cap to corresponding positions, and repeating the process to carry out hole passing operation until all the pier columns and the split type bent cap are mounted.
The invention has the following beneficial effects:
the pier-beam integrated bridge girder erection machine provided by the invention is a bridge construction machine integrating installation and construction of pier columns, split cover beams and box beams; the supporting leg device comprises four sets of supporting leg devices prefabricated in a factory, wherein the supporting leg 1 is used as a front end support when the supporting legs 2, 3 and 4 are hung and move forwards, the supporting legs 2 and 3 are respectively provided with a carrier roller assembly and a hanging assembly, the carrier roller assembly can drive a main beam of a bridge girder erection machine to move in the front-back direction, and the hanging assembly can realize the movement of the supporting legs 2 and 3 in the front-back direction. Based on the bridge girder erection machine structure, the invention provides a novel prefabricated part installation process, after the pier stud and the split type cover beam in the span are installed, hole passing operation is carried out until the next span is used for carrying out pier stud and cover beam hoisting operation, the steps are repeated in such a circulating way, the pier stud and the split type cover beam in the whole line are installed by using one pier-beam integrated bridge girder erection machine, the problem of long waiting time for wet connection of the split type cover beam is solved, and the construction efficiency is greatly improved. By adopting the construction method, the hoisting operation of the pier stud, the capping beam and the box beam can be completed in the operation area with poor foundation bearing capacity, the foundation is prevented from being reinforced due to the requirement of a crane station, the construction cost is saved, and the safety risk is also reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of the pier-beam integrated bridge girder erection machine;
FIG. 2 is a schematic view of the split type bent cap hoisting of the present invention;
FIG. 3 is a schematic view of the split lid beam wet joint closure of the present invention;
fig. 4 is a schematic diagram of the roadbed bearing platform pre-buried finish rolling deformed steel bar of the invention, wherein fig. 4 (a) is a front view of the roadbed bearing platform pre-buried finish rolling deformed steel bar, fig. 4 (b) is a right view of the roadbed bearing platform pre-buried finish rolling deformed steel bar, and fig. 4 (c) is a top view of the roadbed bearing platform pre-buried finish rolling deformed steel bar;
fig. 5 is a schematic diagram of the split type bent cap pre-burying finish-rolling deformed steel bar of the present invention, wherein fig. 5 (a) is a front view of the bent cap pre-burying finish-rolling deformed steel bar, fig. 5 (b) is a right view of the bent cap pre-burying finish-rolling deformed steel bar, and fig. 5 (c) is a top view of the bent cap pre-burying finish-rolling deformed steel bar;
FIG. 6 is a schematic front view of the No. 1 leg of the present invention in a fixed state;
FIG. 7 is a schematic side view of the No. 1 leg of the present invention in a fixed state;
FIG. 8 is a schematic front view of the No. 2 leg of the present invention in a fixed state;
FIG. 9 is an enlarged view of the portion A of FIG. 8;
FIG. 10 is a schematic side view of the No. 2 leg of the present invention in a fixed state;
FIG. 11 is a schematic view of the No. 2 leg of the present invention standing above the bent cap;
FIG. 12 is a schematic front view of the No. 3 leg of the present invention in a fixed state;
FIG. 13 is a schematic side view of the No. 3 leg of the present invention in a fixed state;
FIG. 14 is a schematic view of the No. 3 leg of the present invention standing above the bent cap;
FIG. 15 is a schematic front view of the No. 4 leg of the present invention in a fixed state;
FIG. 16 is a schematic side view of the No. 4 leg of the present invention in a fixed state;
FIG. 17 is a schematic view of the No. 4 leg of the present invention standing above the bent cap;
FIG. 18 is a schematic view illustrating the installation of the leg device of the bridge girder erection machine in step 2 according to the present invention;
FIG. 19 is a schematic view illustrating the installation of the leg device of the bridge girder erection machine in step 3 according to the present invention;
FIG. 20 is a schematic view illustrating the installation of the leg device of the bridge girder erection machine in step 4 of the present invention;
FIG. 21 is a schematic view illustrating the installation of the leg device of the bridge erecting machine in step 6 according to the present invention;
FIG. 22 is a schematic view illustrating the installation of the leg device of the bridge girder erection machine in step 7 of the present invention;
FIG. 23 is a schematic view illustrating the installation of the leg device of the bridge girder erection machine in step 8 according to the present invention;
FIG. 24 is a schematic view illustrating the installation of the leg means of the bridge girder erection machine in step 9 according to the present invention;
fig. 25 is a schematic view illustrating the installation of the leg device of the bridge girder erection machine in step 10 of the present invention.
In the figure: 1-1 support leg; no. 2-2 leg; 3-3 support legs; no. 4-4 leg; 110-a first lower beam; 111-upright post; 112-a second lower beam; 113-a first bottom rail; 114-a diagonal brace; 210-a carrier roller assembly; 211-active suspension assembly; 212-passive suspension assembly; 213-hinged support; 214-a chassis; 215-third lower beam; 216-a second bottom rail; 217-a connecting seat; 310-a fourth lower beam; 311-a third bottom rail; 312-diagonal bracing columns; 410-a fifth lower cross member; 411-high section; 412-a base; 5-longitudinal guide beam; 6-front crown block; 7-rear crown block; 8-a capping beam; 9-roadbed bearing platform; 10-finish rolling the deformed steel bar; 11-a lifting device; 12-a main beam; 13-a cross beam; 14-connecting pier cushion stones; 15-middle pier cushion stone.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. The terms "mounted," "connected," "fixed," and the like are to be construed broadly and may include, for example, fixed connections, removable connections, or integral connections, direct connections, indirect connections through intervening media, and communication between two elements; the specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in figure 1, the pier-beam integrated bridge girder erection machine comprises longitudinal guide beams 5, a main beam 12, a front overhead crane 6, a rear overhead crane 7, four sets of leg devices and a cross beam 13. The crossbeam 13 is a combined splicing type structure and comprises an upper crossbeam and a transverse rail combined beam, wherein the upper crossbeam is of a box type structure, and the upper surface of the upper crossbeam is connected with the longitudinal guide beam 5; the lower part of the upper cross beam is connected with the superposed bolt of the transverse moving track beam to form a whole, which is beneficial to increasing the whole bending resistance and shearing resistance of the structure of the cross beam 13. The main beam 12 is arranged below the longitudinal guide beam 5, and the front crown block 6 and the rear crown block 7 are both arranged on the cross beam 13.
As shown in fig. 1 to 3, four sets of leg devices are prefabricated in a factory, and each leg device comprises a number 1 leg 1, a number 2 leg 2, a number 3 leg 3 and a number 4 leg; no. 1 landing leg is used as the front end support when No. 2, 3, 4 landing leg hang antedisplacement, sets up in roadbed cushion cap 9 top, and No. 2, 3, 4 landing leg set up respectively in the part formula bent cap 8 top. 1. No. 2, 3, 4 landing legs all include two kinds of running condition, fixed state and removal state to satisfy equipment via hole operation requirement.
When the No. 1 supporting leg is in a fixed state, the lower end of the No. 1 supporting leg is temporarily anchored with the finish rolling deformed steel bar 10 pre-embedded in the roadbed bearing platform 9 and is used for supporting during hole passing and hoisting operation. 2. When No. 3, 4 landing legs are in a fixed state, finish rolling deformed steel bar 10 is reserved at the lower end of the landing leg and corresponding bent cap 8 for temporary anchoring, anchoring force is provided for the bridge girder erection machine during via hole, lateral overturning moment generated during via hole construction and hoisting operation is offset, equipment is ensured not to overturn, and safety requirements of via hole and installation operation are met.
As shown in fig. 6 and 7, the No. 1 landing leg 1 includes a first lower cross beam 110 connected to the bottom of the main beam 12, the bottom of the first lower cross beam 110 is connected to a second lower cross beam 112 through a vertical column 111, and an inclined strut 114 is further installed between the first lower cross beam 110 and the second lower cross beam 112, so as to further improve the stability of the No. 1 landing leg 1 device. A first bottom cross beam 113 is arranged below the second lower cross beam 112, and a lifting device 11 is arranged between the second lower cross beam 112 and the first bottom cross beam 113; the bottom of the first bottom cross beam 113 is provided with a spiral adjusting device and an anchoring steel plate, and when the No. 1 supporting leg 1 is in a fixed state, the finish rolling deformed steel bar 10 is reserved with the roadbed bearing platform 9 through the anchoring steel plate for temporary anchoring.
As shown in fig. 8 to 11, the support leg No. 2 includes a roller assembly 210 symmetrically installed below the main beam 12, a hanging assembly is installed above the roller assembly 210, the hanging assembly includes an active hanging assembly 211 and a passive hanging assembly 212, the lower part of the roller assembly 210 is installed on a chassis 214 through a hinged support 213, and the chassis 214 is installed at two ends of the upper surface of a third lower cross beam 215. A second bottom cross beam 216 is further arranged below the third lower cross beam 215, and a lifting device 11 is also arranged between the third lower cross beam 215 and the second bottom cross beam 216 to realize the lifting movement of the No. 2 support leg 2; four connecting seats 217 are installed at the bottom of the second bottom cross beam 216, anchor bolt holes are formed in the bottoms of the connecting seats 217, and when the No. 2 supporting leg 2 is in a fixed state, temporary anchoring is performed through the connecting seats 217 and the finish-rolled deformed steel bar 10 above the cover beam 8. As shown in fig. 8 to 14, the support leg 3 includes a carrier roller assembly 210, an active suspension assembly 211, a passive suspension assembly 212, a chassis 214, a lifting device 11, and a connecting seat 217, which have the same structure and installation position as those of the support leg 2 of No. 3; the No. 3 support leg 3 further comprises a fourth lower cross beam 310 and a third bottom cross beam 311, the structures and the installation positions of the fourth lower cross beam 310 and the third lower cross beam 215 are the same, and the structures and the installation positions of the third bottom cross beam 311 and the second bottom cross beam 216 are the same; the quantity of each part in 3 # landing leg 3 is half in 2 # landing leg 2, still installs oblique support column 312 between 3 # landing leg 3 and the bent cap 8 upper surface.
As shown in fig. 15 to 17, the No. 4 landing leg 4 includes a fifth lower beam 410 in an arch frame structure, two ends of the fifth lower beam 410 are connected to the lifting device 11 through hinges 213, the other end of the lifting device 11 is connected to the main beam 12, a heightening section 411 is installed at the bottom of the fifth lower beam 410, a base 412 is installed at the bottom of the heightening section 411, an anchor bolt hole is formed at the bottom of the base 412, and when the No. 4 landing leg 4 is in a fixed state, the No. 4 landing leg is temporarily anchored to the finish-rolled deformed steel bar 10 above the cover beam 8 through the base 412.
The lifting device 11 comprises an outer guide sleeve, an inner guide pillar is arranged in the outer guide sleeve, the outer guide sleeve is connected with a hydraulic oil cylinder, the outer guide sleeve is lifted along the inner guide pillar by utilizing the hydraulic oil cylinder, and therefore the four sets of leg devices can be lifted; the outer guide sleeve and the inner guide post of the lifting device 11 are coated with lithium-based lubricating grease during installation, so that free guiding can be ensured. The hanging assembly can realize the movement of No. 2 supporting legs 2 and No. 3 supporting legs 3 in the front-back direction, and the carrier roller assembly 210 can drive the main beam 12 to move in the front-back direction.
2. All install the core dish on 3, 4 # landing legs for angle modulation, the bridge girder erection machine of being convenient for carries out the erections of curve bridge and skew bridge, makes the range of application of bridge girder erection machine wider. In the embodiment, preferably, all structural components in the bridge girder erection machine are made of Q355C low-alloy structural steel by welding; as shown in fig. 4 and 5, the diameter of finish-rolled deformed steel bars 10 used when the four sets of leg devices are in bolt connection and anchoring with a roadbed bearing platform 9 and a cover beam 8 is 32mm, 8 finish-rolled deformed steel bars 10 are adopted at each anchoring point, and the left side and the right side of each anchoring point are respectively anchored; 2. when the No. 3 and No. 4 supporting legs are anchored with the capping beam 8, the upper surface of the capping beam 8 is also provided with a connecting pier cushion stone 14 and a middle pier cushion stone 15.
The method for carrying out via hole construction by utilizing the pier-beam integrated bridge girder erection machine comprises the following steps:
step 1: after pier stud, bent cap 8 in this span of installation, loosen bearing roller and main girder 12 anchor, prepare the via hole, bent cap 8 is only being in milk this moment, does not carry out wet joint between two bent cap 8.
Step 2: as shown in fig. 18, leg No. 2 is anchored above a cap beam 8 on the roadbed cap 9 of leg No. 1, this cap beam 8 is not wet-jointed, and the front crown block 6 and the rear crown block 7 are stopped near leg No. 2.
And step 3: as shown in fig. 19, leg 1 No. 1 is released and lifted to a position 500mm or more from the ground.
And 4, step 4: as shown in fig. 20, the main beam 12 is pushed to move forward by 9.6m by using the idler assemblies 210 on the No. 2 support leg 2 and the No. 3 support leg 3, and in the process, the front overhead traveling crane 6 and the rear overhead traveling crane 7 synchronously move backward and keep the relative position with the No. 2 support leg 2.
And 5: the No. 3 supporting leg is emptied, and the No. 4 supporting leg is anchored on the bent cap 8 anchored by the No. 3 supporting leg.
Step 6: as shown in figure 21, the No. 3 leg 3 is pushed forward by 30m by the hanging assembly, and reaches the upper part of the cover beam 8 between the No. 2 leg 2 and the No. 4 leg 4, and is anchored.
And 7: as shown in fig. 22, the support leg 4 No. 4 is emptied, the main beam 12 is pushed forward by 10m by using the roller assemblies 210 on the support legs 2 No. 2 and 3 No. 2, and in the process, the front overhead crane 6 and the rear overhead crane 7 synchronously move backward and keep the relative position with the support leg 2 No. 2 still.
And 8: as shown in fig. 23, the front crown block 6 and the rear crown block 7 are moved to the vicinity of the support leg 3 No. 3.
And step 9: as shown in fig. 24, the main beam 12 is pushed to move forward by 11m by using the carrier roller assemblies 210 on the support legs 2 and 3, and in the process, the front overhead crane 6 and the rear overhead crane 7 synchronously move backward and keep the relative position with the support leg 3; and then anchoring the No. 1 supporting leg 1 on the corresponding roadbed bearing platform 9 below the No. 1 supporting leg, and completing the via hole.
Step 10: as shown in fig. 25, the pier stud and the segmented bent cap 8 are mounted at corresponding positions, and the above process is repeated to perform the via-hole operation until all the pier studs and the segmented bent cap 8 are mounted.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (10)
1. A pier-beam integrated bridge girder erection machine is characterized by comprising a longitudinal guide beam (5), a main beam (12), a crown block, four sets of leg devices and a cross beam (13), wherein the cross beam (13) is connected with the longitudinal guide beam (5), the main beam (12) is arranged below the longitudinal guide beam (5), the crown block is arranged on the cross beam (13), and the four sets of leg devices are respectively arranged at different positions below the main beam (12); the four sets of supporting leg devices comprise a No. 1 supporting leg (1), a No. 2 supporting leg (2), a No. 3 supporting leg (3) and a No. 4 supporting leg (4), wherein the No. 1 supporting leg is used as a front end support for hanging and moving forwards of the No. 2, 3 and 4 supporting legs and is arranged above a roadbed bearing platform (9), and the No. 2, 3 and 4 supporting legs are respectively arranged above the split type cover beam (8);
the four sets of leg devices respectively comprise two working states, namely a fixed state and a moving state; when the No. 1 supporting leg (1) is in a fixed state, the lower end of the No. 1 supporting leg is anchored with the finish rolling deformed steel bar (10) pre-buried in the roadbed bearing platform (9), and when the No. 2 supporting leg, the No. 3 supporting leg and the No. 4 supporting leg are in a fixed state, the lower ends of the No. 1 supporting leg and the corresponding cover beam (8) reserve the finish rolling deformed steel bar (10) for anchoring.
2. The pier-beam integrated bridge girder erection machine according to claim 1, wherein the No. 1 landing leg (1) comprises a first lower cross beam (110) connected with the bottom of the main girder (12), the bottom of the first lower cross beam (110) is connected with a second lower cross beam (112) through a vertical column (111), and a diagonal brace (114) is arranged between the first lower cross beam (110) and the second lower cross beam (112); a first bottom cross beam (113) is arranged below the second lower cross beam (112), and a lifting device (11) is arranged between the second lower cross beam (112) and the first bottom cross beam (113); the bottom of the first bottom cross beam (113) is provided with a spiral adjusting device and an anchoring steel plate, and when the No. 1 supporting leg (1) is in a fixed state, finish rolling deformed steel bars (10) are reserved between the anchoring steel plate and a roadbed bearing platform (9) for temporary anchoring.
3. The pier-beam integrated bridge girder erection machine according to claim 1, wherein the No. 2 supporting leg (2) comprises roller assemblies (210) symmetrically installed below the main beam (12), and a hanging assembly is installed above the roller assemblies (210); the lower part of the carrier roller assembly (210) is arranged on a chassis (214) through a hinged support (213), and the chassis (214) is arranged at two ends of the upper surface of a third lower cross beam (215); a second bottom cross beam (216) is further arranged below the third lower cross beam (215), and a lifting device (11) is arranged between the third lower cross beam (215) and the second bottom cross beam (216); four connecting seats (217) are installed at the bottom of the second bottom cross beam (216), anchor bolt holes are formed in the bottoms of the connecting seats (217), and when the No. 2 supporting leg (2) is in a fixed state, the connecting seats (217) and the finish rolling deformed steel bar (10) above the cover beam (8) are used for temporary anchoring.
4. The pier-beam integrated bridge girder erection machine according to claim 3, wherein the No. 3 supporting leg (3) comprises a carrier roller assembly (210), a hanging assembly, a chassis (214), a lifting device (11) and a connecting seat (217) which have the same structure and the same installation position as those of the No. 2 supporting leg (2); the No. 3 supporting leg (3) also comprises a fourth lower cross beam (310) with the same structure and installation position as the third lower cross beam (215), and a third bottom cross beam (311) with the same structure and installation position as the second bottom cross beam (216); the number of each part in 3 # landing leg (3) is half in 2 # landing leg (2), installs between 3 # landing leg (3) and bent cap (8) upper surface oblique stay post (312).
5. The pier-beam integrated bridge girder erection machine according to claim 4, wherein the hanging assembly can drive the No. 2 supporting leg (2) and the No. 3 supporting leg (3) to move in the front-rear direction, and the carrier roller assembly (210) can drive the main girder (12) to move in the front-rear direction.
6. The pier-beam integrated bridge girder erection machine according to claim 1, wherein the No. 4 landing leg (4) comprises a fifth lower cross beam (410) in an arch frame body structure, two ends of the fifth lower cross beam (410) are connected with a lifting device (11) through hinged supports (213), the other end of the lifting device (11) is connected with a main beam (12), a heightening joint (411) is installed at the bottom of the fifth lower cross beam (410), a base (412) is installed at the bottom of the heightening joint (411), an anchor bolt hole is formed in the bottom of the base (412), and when the No. 4 landing leg (4) is in a fixed state, the landing leg is temporarily anchored with the finish-rolled threaded steel (10) above the cover beam (8) through the base (412).
7. The pier-beam integrated bridge girder erection machine according to any one of claims 2 to 6, wherein the diameter of finish-rolled deformed steel bars (10) used for temporary anchoring is 32mm, 8 finish-rolled deformed steel bars (10) are adopted at each anchoring point, and the left side and the right side of each anchoring point are respectively anchored; the upper surface of the capping beam (8) is provided with a connecting pier cushion stone (14) and a middle pier cushion stone (15).
8. The pier-beam integrated bridge girder erection machine according to any one of claims 2 to 6, wherein the lifting device (11) comprises an outer guide sleeve, an inner guide post is installed in the outer guide sleeve, the outer guide sleeve is connected with a hydraulic oil cylinder, and the outer guide sleeve can perform lifting motion along the inner guide post; and lithium-based lubricating grease is coated on the outer guide sleeve and the inner guide post during installation.
9. The pier-beam integrated bridge girder erection machine according to claim 1, wherein core discs for angle adjustment are mounted on the No. 2, 3 and 4 support legs; all structural components in the bridge girder erection machine are made of Q355C low-alloy structural steel through welding.
10. The method for constructing the through hole by using the bridge girder erection machine as claimed in any one of claims 1 to 9, comprising the steps of:
step 1: after the pier stud and the capping beam (8) in the span are installed, the carrier roller and the main beam (12) anchoring device are loosened to prepare for hole passing, at the moment, the capping beam (8) is only grouted, and wet connection is not carried out between the two capping beams (8);
step 2: anchoring the No. 2 supporting leg (2) above a cover beam (8) on a roadbed bearing platform (9) of the No. 1 supporting leg (1), and stopping the crown block above the No. 2 supporting leg (2);
and step 3: the No. 1 supporting leg (1) is released and lifted to a position which is 500mm above the ground;
and 4, step 4: pushing the main beam (12) to move forward by 9.6m by using a carrier roller assembly (210), wherein the overhead travelling crane synchronously moves backward and keeps the relative position with the No. 2 supporting leg (2) still in the process;
and 5: the No. 3 supporting leg (3) is released, and the No. 4 supporting leg (4) is anchored on the bent cap (8) anchored by the No. 3 supporting leg (3) originally;
step 6: pushing the No. 3 supporting leg (3) to move forward by 30m by using the hanging assembly, reaching the position above a cover beam (8) between the No. 2 supporting leg (2) and the No. 4 supporting leg (4), and anchoring;
and 7: the No. 4 supporting leg (4) is emptied, the main beam (12) is pushed to move forward by 10m by using the carrier roller assembly (210), and in the process, the crown block synchronously moves backward and keeps the relative position with the No. 2 supporting leg (2) still;
and 8: moving the crown block to the position above the No. 3 supporting leg (3);
and step 9: pushing the main beam (12) to move forward by 11m by using a carrier roller assembly (210), wherein the crown block synchronously moves backward and keeps a relative position with the No. 3 supporting leg (3) still in the process; then anchoring the No. 1 supporting leg (1) on a corresponding roadbed bearing platform (9) below the No. 1 supporting leg, and completing hole passing;
step 10: and (3) installing the pier columns and the split type bent cap (8) to corresponding positions, and repeating the process to carry out hole passing operation until all the pier columns and the split type bent cap (8) are installed.
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| CN113774801A (en) * | 2021-09-17 | 2021-12-10 | 宁波市政工程建设集团股份有限公司 | Construction method for quick orthogonal deflection frame beam |
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| CN114541277A (en) * | 2022-04-01 | 2022-05-27 | 郑州新大方重工科技有限公司 | Fully-assembled bridging system, beam erecting and hole passing method |
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