CN112900280A - Bridge prefabricated bent cap installation in-place construction method and construction structure - Google Patents
Bridge prefabricated bent cap installation in-place construction method and construction structure Download PDFInfo
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- CN112900280A CN112900280A CN202110143088.2A CN202110143088A CN112900280A CN 112900280 A CN112900280 A CN 112900280A CN 202110143088 A CN202110143088 A CN 202110143088A CN 112900280 A CN112900280 A CN 112900280A
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- 238000010276 construction Methods 0.000 title claims abstract description 60
- 238000009434 installation Methods 0.000 title claims abstract description 29
- 239000002002 slurry Substances 0.000 claims abstract description 116
- 238000009417 prefabrication Methods 0.000 claims abstract 4
- 229910000831 Steel Inorganic materials 0.000 claims description 60
- 239000010959 steel Substances 0.000 claims description 60
- 238000003466 welding Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims 1
- 239000011440 grout Substances 0.000 abstract description 20
- 239000007788 liquid Substances 0.000 abstract description 9
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000005056 cell body Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002699 waste material Substances 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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Abstract
The invention discloses a construction method and a construction structure for installing a bridge prefabricated capping beam in place, wherein the construction method comprises the following steps: installing a gantry crane track, and treating a foundation of the gantry crane track; bolting and assembling detachable gantry crane rails; the length of the gantry crane rails is set to be 60m, every 6m sections of the gantry crane rails are connected through bolts, and the 60m gantry crane rails are connected and combined into a whole; installing a slurry storage groove, arranging the slurry storage groove at the bottom of the bent cap, and fixing the slurry storage groove on the pier stud according to a preset position; installing a cover beam, and hoisting and installing the cover beam by a gantry crane traveling on the rail and adjusting a cover beam crown block; it can make the bent cap counterpoint fast in the installation of bridge prefabrication bent cap, reduces rotatory, the safe risk of removal in the bent cap installation, solves the synchronism problem of many equipment collaborative operation, improves the installation effectiveness, guarantees that the bent cap is sat thick liquid full, avoids influencing pier stud appearance quality, improves and holds grout groove ann and tear efficiency open.
Description
Technical Field
The invention belongs to the technical field of bridge substructure construction, and particularly relates to a bridge prefabricated bent cap installation and in-place construction method and a construction structure.
Background
In the assembling construction process of the prefabricated bent cap, the bent cap is generally hoisted by combining two crawler cranes, and the position and the elevation of the prefabricated bent cap are controlled by the rotation and the movement of the crawler cranes and the rising and falling of a lifting hook. However, in the assembling construction of the prefabricated bent cap with narrow operation area and more cross operation, the size of the prefabricated bent cap is larger, so that the crawler crane is more limited in rotation and movement and poor in synchronization effect, and the assembling construction requirement of the prefabricated bent cap cannot be met.
In the prior art, the bridge precast beam is installed by adopting two gantry cranes, but if the two separated independent gantry cranes are adopted for constructing the bent cap, the bent cap cannot be twisted in the horizontal direction and cannot be accurately positioned, and the construction requirement for assembling the precast bent cap cannot be met. The conventional gantry crane track is integrally manufactured, the gantry crane track is arranged in the full length, the material input amount is large, and the track utilization rate is low.
The conventional operation of the prefabricated capping beam slurry sitting construction is that angle steel or square steel is adopted to be anchored on the periphery of the pier top and used as a slurry sitting and storing groove. The appearance is damaged due to the fact that holes are needed to be punched on the pier stud for installing the support, and the installing and dismantling efficiency is low; the capping beam cannot be guaranteed to be full; the slurry overflows to pollute the pier stud.
Disclosure of Invention
The invention provides a construction method and a construction structure for mounting and positioning a bridge precast bent cap, which are convenient for mounting and construction of the bent cap, have high positioning precision, ensure full grouting of the bent cap, have low material and cost investment, high efficiency, short construction period, safety and reliability.
In order to achieve the purpose, the invention adopts the following technical scheme:
firstly, the construction method for installing and positioning the bridge precast capping beam comprises the following steps:
firstly, installing a gantry crane track,
treating the foundation of the gantry crane track;
assembling and welding a detachable gantry crane track;
connecting adjacent gantry crane rails, and connecting and combining m gantry crane rails into a whole;
secondly, installing a slurry storage tank,
arranging a slurry storage groove at the bottom of the bent cap, and fixing the slurry storage groove on the pier stud according to a preset position;
thirdly, installing the cover beam,
and hoisting and installing the capping beam by walking the gantry crane on a gantry crane rail and adjusting the relative position of the main truss and the crown block.
Furthermore, when the detachable gantry crane track is assembled and welded, the bottom steel plate is connected with the bottom of the supporting I-steel, the gantry crane track is placed in the center of the top of the supporting I-steel, the gantry crane track is connected with the supporting I-steel, and then the detachable gantry crane track is sequentially placed at preset positions according to a lofting line type.
Further, when adjacent gantry crane rails are connected, the adjacent gantry crane rails are connected through a connecting plate; arranging at least two bolt holes in the connecting plate, and arranging bolts for connecting the gantry crane track and the connecting plate in the bolt holes; when the bolts on the connecting plate penetrate through the bolt holes, the bolts are sequentially installed in the positive direction and the negative direction at intervals.
Furthermore, a support leg is arranged on the gantry crane track; after the gantry crane rails are connected and combined into a whole, the adjacent support legs of the two gantry cranes on the gantry crane rails are connected with the linkage device, so that the two gantry cranes can synchronously move on the gantry crane rails.
Secondly, the bridge prefabricated bent cap installation in-place construction structure is used for realizing the bridge prefabricated bent cap installation in-place construction method, and comprises a foundation and a slurry storage groove arranged at the bottom of the bent cap, wherein a gantry crane rail of a detachable assembly structure is arranged on the foundation; adjacent gantry crane tracks are connected; the slurry storage groove is fixed on the pier stud.
Furthermore, the gantry crane track is fixedly arranged at the center of the top of the supporting I-steel, and the bottom of the supporting I-steel is fixedly connected with the bottom steel plate; the gantry crane rails are sequentially arranged according to the lofting line type.
Furthermore, adjacent gantry crane rails are connected through a connecting plate; the connecting plate is provided with at least two bolt holes, and bolts for connecting the gantry crane track and the connecting plate are arranged in the bolt holes; bolts on the connecting plate sequentially penetrate through the bolt holes in the positive direction and the negative direction at intervals.
Furthermore, the gantry crane track is provided with support legs; the gantry crane rails are connected and combined into a whole, and the supporting legs of the gantry crane rails are connected with the linkage device, so that the gantry crane system can synchronously move on the rails.
Further, a top transverse steel truss is installed on a main truss on the top of the gantry crane; the top transverse steel truss is arranged on the moving trolley.
Furthermore, the crown block is provided with traveling wheels and has a hoisting function; the supporting hoop and the pulp storage groove body are fixedly connected to the pier column; the spring system is arranged on the supporting hoop to realize elastic support of the slurry storage tank body; the slurry storage tank rainwater port slurry baffle plate is connected to the slurry storage tank body and is positioned on one side of the water flowing tank; arrange the thick liquid hole and offer hold thick liquid groove cell body top for the bent cap is fallen down to sit thick liquid and hold thick liquid groove cell body and compress spring system downwards, discharges unnecessary thick liquid through arranging the thick liquid hole.
The invention can achieve the following beneficial effects:
according to the construction method and the construction structure for mounting the precast bent cap of the bridge in place, the safety risk of mounting the bent cap by adopting the crawler crane is high, the synchronization effect is poor, and the mounting precision is difficult to control; anchoring bolts need to be driven into the periphery of the pier stud in the conventional slurry storage groove installation, and a large amount of foam rubber is filled in gaps to influence the appearance of the pier stud; and the sitting pulp can not be fully filled, and the pier stud and the bent cap can not be in seamless connection; meanwhile, the grout is easy to overflow along the periphery of the pier column along the gap of the pier column, so that the appearance of the pier column is polluted; the construction method and the construction structure for mounting and positioning the prefabricated bent cap of the bridge can be beneficial to conveniently mounting and constructing the bent cap, can improve the positioning precision, ensure the bent cap to be full in grout, reduce the material waste and the cost input, shorten the construction period, improve the construction efficiency and improve the safety and reliability.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flow chart of the construction method for installing and positioning the bridge precast capping beam.
Fig. 2 is a front view of a gantry crane track of the bridge precast capping beam installation and positioning construction structure of the present invention.
Fig. 3 is a top view of a gantry crane track of the bridge precast capping beam installation in-place construction structure of the present invention.
Fig. 4 is a schematic structural diagram of a segment of a gantry crane track of the bridge precast capping beam installation and in-place construction structure of the invention.
Fig. 5 is a front view of the construction structure for installing the bridge precast capping beam in place according to the present invention.
Fig. 6 is a side view of the bridge precast capping beam in-place construction structure of the present invention.
Fig. 7 is a front view of a hoisting bent cap of the bridge precast bent cap installation-in-place construction structure of the invention.
Fig. 8 is a side view of the hoisting bent cap of the bridge precast bent cap installation-in-place construction structure of the invention.
Fig. 9 is a side view of a slurry storage tank of the construction structure for installing the bridge girder in place according to the present invention.
Fig. 10 is a top view of a slurry storage tank of the construction structure for installing the bridge girder in place according to the present invention.
In fig. 2 to 10, 1 is a bottom steel plate, 2 is a supporting i-steel, 3 is a gantry crane track, 4 is a connecting plate, 5 is a bolt, 6 is a bolt hole, 7 is a welding gasket, 8 is a supporting leg, 9 is a linkage device, 10 is a gantry crane beam, 11 is a moving trolley, 12 is a top transverse steel truss, 13 is a moving and hoisting crown block, 14 is a cover beam, 15 is a supporting hoop, 16 is a slurry storage tank body, 17 is a spring system, 18 is a slurry storage tank rainwater port baffle plate, 19 is a slurry discharge hole, and 20 is a supporting steel plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
Referring to fig. 1, a construction method for installing and positioning a bridge precast capping beam comprises the following steps:
firstly, installing a gantry crane track 3,
treating the foundation under the gantry crane track 3;
assembling and welding the detachable gantry crane track 3;
as shown in fig. 2 to 4, the number of the gantry crane rails 3 is set to be at least two, the adjacent gantry crane rails 3 are connected, and the gantry crane rails 3 with the length of not at least 60m are connected and combined into a whole;
secondly, installing a slurry storage tank,
as shown in fig. 9 and 10, a grout storage groove is formed at the bottom of the bent cap 14 and is fixed on the pier column according to a preset position;
thirdly, installing the cover beam,
as shown in fig. 7 and 8, the cap beam 14 is lifted and installed by moving the gantry crane on the gantry crane rail 3 and adjusting the relative position of the main girder 12 and the traveling and hoisting crown 13.
Example 2
On the basis of embodiment 1, the construction method for installing and positioning the bridge precast capping beam further comprises the steps of setting out the position-moving line type of the gantry crane track 3 and processing the foundation in the traveling range of the gantry crane track 3 when processing the foundation of the gantry crane track 3.
And furthermore, when the detachable gantry crane track 3 is assembled and welded, the bottom steel plate 1 is connected with the bottom of the supporting I-beam 2, the gantry crane track 3 is placed at the center of the top of the supporting I-beam 2, the gantry crane track 3 is connected with the supporting I-beam 2, and then the detachable gantry crane track 3 is sequentially placed at a preset position according to a lofting line type.
And furthermore, when the bottom steel plate 1 and the support I-shaped steel 2 are connected, the two are connected by welding.
And furthermore, when the gantry crane track 3 is connected with the supporting I-steel 2, the gantry crane track and the supporting I-steel are connected through welding.
And furthermore, when the gantry crane track 3 and the support I-steel 2 are welded and connected, the gantry crane track and the support I-steel are welded and connected through a welding gasket 7.
Further, when the length of the gantry crane rail 3 is at least 60m, the length of the gantry crane rail 3 is set to 60 m.
And further, when the adjacent gantry crane rails 3 are connected, the adjacent gantry crane rails 3 are connected through the connecting plate 4.
And furthermore, when the adjacent gantry crane rails 3 are connected through the connecting plate 4, at least two bolt holes 6 are formed in the connecting plate 4, and bolts 5 for connecting the gantry crane rails 3 and the connecting plate 4 are arranged in the bolt holes 6.
Further, when at least two bolt holes 6 are formed in the connecting plate 4, six bolt holes 6 are formed in the connecting plate 4.
Furthermore, when the bolt holes 6 are internally provided with bolts 5 for connecting the gantry crane track 3 and the connecting plate 4, the bolts 5 on the connecting plate 4 are sequentially installed at intervals in the positive direction and the negative direction when penetrating through the bolt holes 6.
Further, when a slurry storage tank is arranged at the bottom of the cover beam 14, the slurry storage tank is fixedly connected to the bottom of the cover beam 14 through the supporting hoop 15.
It is further possible to provide the detachable gantry crane track 3 as a segmented structure.
It is further possible to provide the segmental structure of the detachable gantry crane track 3 with a length of 6m per segment.
It is still further possible to provide both ends of each of said segments with a connecting inner end and a connecting outer end.
And the detachable gantry crane rails 3 can be further assembled and welded, or the gantry crane rails 3 with the length of at least 60m are connected and combined into a whole, and then are assembled, disassembled or transported through a forklift.
And two gantry crane supporting legs 8 can be further arranged on the gantry crane track 3.
Furthermore, a support leg 8 is arranged on the gantry crane track 3; the gantry crane rails 3 with the length of at least 60m are connected and combined into a whole, and the adjacent support legs 8 of the two gantry cranes are connected with the linkage device 9, so that the two gantry cranes can synchronously move on the gantry crane rails 3.
It is also possible to further set the number of the top transverse steel main girders 12 to at least two.
Furthermore, a travelling trolley 11 can be arranged between the top transverse steel main truss 12 and the top main truss 10 of the gantry crane.
Still further, at least two top transverse steel main trusses 12 may be installed transversely along the gantry top main truss 10.
Further, a set of traveling and hoisting crown blocks 13 may be provided on each of the two top transverse main girders 12.
And further, the travelling wheels below the travelling gantry crane supporting legs 8 are set as driving wheels.
The walking wheels can be further arranged as universal wheels.
It is further possible to provide the top transverse steel main girder 12 as a structure movable in the left-right direction on the main girder 10.
It is also possible to further set the number of the top transverse steel main girders 12 to be at least two and move the top transverse steel main girders 12 in the left-right direction on the main girders 10, and move the top transverse steel main girders 12 together, or move the top transverse steel main girders 12 individually.
Further, the top traveling and hoisting crown block 13 may be disposed on the top transverse steel main truss 12, and when the top traveling and hoisting crown block 13 is moved in the front-rear direction on the transverse steel main truss 12, the top traveling and hoisting crown block 13 may be moved together, or the top traveling and hoisting crown block 13 may be moved separately.
The slurry storage tank can further comprise a support hoop 15, a slurry storage tank body 16, a spring system 17, a slurry storage tank rainwater port slurry baffle 18 and a slurry discharge hole 19; fixedly connecting the pulp storage groove body 16 to the pier stud; the spring system 17 is arranged on the supporting hoop 15, so that the elastic support for the slurry storage tank body 16 is realized; connecting the slurry storage tank rainwater port slurry baffle 18 to one side of the slurry storage tank body, which is positioned on the water flowing tank; and the slurry discharge hole 19 is formed at the top of the slurry storage tank body.
Still further, the supporting hoop 15 is set to be an annular structure, and the annular structure of the supporting hoop 15 is set to be a combined structure connected by two hoop plates according to the plane size of the pier stud.
And an annular upper stiffening wing plate is arranged outside the upper edge of the supporting hoop of the combined structure in a surrounding manner.
Furthermore, the two sides of the pier stud without the drainage groove are symmetrically provided with tie rib plates, the tie rib plates and the upper stiffening wing plate are respectively provided with a connecting screw hole, and the tie rib plates and the upper stiffening wing plate are connected by arranging a connecting bolt in the connecting screw hole.
It is further possible to provide that the spring system 17 comprises a spring sleeve and a spring, which is arranged in the spring sleeve.
An annular lower stiffening wing plate arranged outside the lower edge of the supporting hoop 15 of the combined structure is arranged below the upper stiffening wing plate.
And the tie rib plate can be further connected with the lower stiffening wing plate.
Still further, the inner diameter of the supporting hoop 15 is set to be larger than the outer diameter of the pier stud.
And the spring sleeve can be fixedly connected to the lower stiffening wing plate.
And the spring sleeve is fixedly connected to the lower stiffening wing plate in a welding mode.
And a stiffening plate is connected to the lower stiffening wing plate below the spring sleeve.
Still further, the stiffener may be provided in a triangular shape.
Still further, the number of the spring sleeves and the number of the springs are respectively set to be at least two on each side, or not less than six along a circumference.
Still further, the spring sleeve and the spring are evenly distributed on the outer wall of the pier stud.
Still further, the pier stud is a rectangular stud, the slurry storage groove 16 is a rectangular annular groove, the support hoop 15 is a rectangular hoop, and the upper stiffening wing plate and the lower stiffening wing plate are rectangular annular plates.
Still further, the number of the spring sleeves and the number of the springs are respectively eight, and along four side edges of the pier stud, two spring sleeves and two springs are arranged on each side edge.
Furthermore, a grout stop belt can be connected to the inner edge of the grout blocking plate 18 of the gutter inlet.
Still further, the slurry retaining groove gutter inlet slurry baffle 18 may be arranged in a ring shape, and the slurry stopping belt may be arranged in a ring shape.
Further, the slurry retaining groove gutter inlet slurry baffle 18 may be formed in a rectangular ring shape, and the slurry stopping belt may be formed in a rectangular ring shape.
The slurry stopping belt can be further welded and connected with the slurry retaining plate 18 of the slurry storage tank rainwater port.
Further, the vertical side of the trough body of the slurry storage trough 16 is formed by the hoop plate of the supporting hoop 15, and the slurry discharge hole 19 is formed at the top of the hoop plate.
It is further possible to arrange the number of the stock discharge holes 19 to be at least two per side and evenly distributed.
The slurry outlet 18 can be further connected with a slurry outlet pipe.
Example 3
Referring to fig. 2 to 10, a bridge precast capping beam installation and positioning construction structure is used for implementing the bridge precast capping beam installation and positioning construction method according to embodiment 1 or embodiment 2, and includes a foundation and a slurry storage tank arranged at the bottom of a capping beam 13, wherein a gantry crane rail 3 of a detachable assembly structure is arranged on the foundation; the number of the gantry crane tracks 3 is at least two, and the adjacent gantry crane tracks 3 are connected; the gantry crane system is formed by assembling and splicing gantry cranes, so that the mounting operation of the bent cap is realized; the slurry storage groove is fixed on the pier stud.
Example 4
Referring to fig. 2 to 4, in the construction structure for installing the prefabricated bent cap of the bridge in place, based on embodiment 3, more specifically, a gantry crane track 3 is fixedly installed at the center of the top of a supporting i-beam 2, and the bottom of the supporting i-beam 2 is fixedly connected with a bottom steel plate 1; at least two gantry crane tracks 3 are arranged in sequence according to the lofting line type.
Specifically, the bottom steel plate 1 and the support i-steel 2 are connected in a welding mode.
And in addition, the gantry crane track 3 and the supporting I-steel 2 can be welded and connected.
And specifically, the gantry crane track 3 and the support I-steel 2 are welded and connected through a welding gasket 7.
It can also be specific that the length of the gantry crane track 3 is at least 60 m.
And in addition, adjacent gantry crane rails 3 can be connected through a connecting plate 4.
And at least two bolt holes 6 are formed in the connecting plate 4, and bolts 5 for connecting the gantry crane track 3 and the connecting plate 4 are arranged in the bolt holes 6.
In addition, six bolt holes 6 may be formed in the connecting plate 4.
In detail, the bolts 5 on the connecting plate 4 sequentially penetrate through the bolt holes 6 at intervals in the positive direction and the negative direction.
In a further specific aspect, the slurry storage tank is fixedly connected to the bottom of the capping beam 14 through a support hoop.
In a further embodiment, the detachable gantry crane track 3 is configured as a segmented structure.
It can also be specified that the structure of the segments of the detachable gantry crane track 3 is configured such that each segment has a length of 6 m.
In some embodiments, the two ends of each segment are provided with a connecting inner end and a connecting outer end.
And the detachable gantry crane track 3 can be assembled and welded into a whole and is mounted on a forklift, so that the whole can be mounted, dismounted or transported.
In particular, the support legs 8 can be arranged on the gantry crane track 3.
And particularly, between adjacent supporting legs 8 of the two gantry cranes, the supporting legs 8 are connected with a linkage device 9, so that the two gantry cranes can synchronously move on the gantry crane track 3.
In addition, a transverse steel main truss 12 can be arranged on the top of the main truss 10 on the top of the gantry crane.
It may also be specific that the number of the top transverse steel main girders 12 is set to at least two.
It may also be specific that at least two top transverse steel primary girders 12 are arranged in longitudinal direction.
It may also be specific that the top transverse steel main girder 12 is mounted on the travelling trolley 11.
Specifically, the crown block 13 is provided with traveling wheels and has a hoisting function; the supporting anchor ear 15 and the pulp storage groove body 16 are fixedly connected to the pier stud; the spring system 17 is arranged on the supporting hoop 15 to realize elastic support of the slurry storage tank body 16; the slurry storage tank rainwater port slurry baffle plate 18 is connected to the slurry storage tank body and is positioned on one side of the launder; the slurry discharging hole 19 is formed in the top of the slurry storage tank body, so that the cover beam is located below the slurry storage tank body 16 to compress the spring system 17 downwards, and redundant slurry is discharged through the slurry discharging hole 19 to ensure that the slurry is full.
Specifically, the top moving and hoisting crown blocks 13 are arranged on the transverse steel main trusses 12, and the moving and hoisting crown blocks 13 are arranged on two top transverse steel main trusses 12 in a group respectively.
And particularly, walking wheels are arranged below the supporting legs 8 of the gantry crane.
It can also be specific that the walking wheels are arranged as driving wheels.
It can also be specific that the walking wheels are provided as universal wheels.
Specifically, the top transverse steel main truss 12 is arranged on the main truss 10, and the transverse steel main truss 12 is movable in the left-right direction by the movable trolley 11.
It may be further specific that the number of the top transverse steel main girders 12 is set to be at least two, and the top transverse steel main girders 12 are set to be a structure moving together in the left-right direction on the main girders 10 or a structure moving each top transverse steel main girder 11 individually.
The slurry storage tank comprises a support hoop 15, a slurry storage tank body 16, a spring system 17, a slurry storage tank rainwater port baffle plate 18 and a slurry discharge hole 19; the slurry storage groove body 16 is fixedly connected to the pier stud; the spring system 17 is arranged on the supporting hoop 15 to realize elastic support of the slurry storage tank body 16; the slurry storage tank rainwater port slurry baffle plate 18 is connected to the slurry storage tank body 16 and is positioned on one side of the water flowing tank; the slurry discharge hole 19 is formed at the top of the slurry storage tank body 16.
It can also be specific, the support hoop 15 is set to be an annular structure, and the annular structure of the support hoop 15 is set to be a combined structure connected by two hoop plates according to the plane size of the pier stud.
In a further specific embodiment, an annular upper stiffening wing plate is arranged around the outer portion of the upper edge of the supporting hoop 15 of the combined structure.
The pier stud without the drainage groove can be further specifically characterized in that two sides of the pier stud without the drainage groove are symmetrically provided with tie rib plates, connecting screw holes are formed in the tie rib plates and the upper stiffening wing plate respectively, and the tie rib plates are connected with the upper stiffening wing plate through connecting bolts arranged in the connecting screw holes.
In a further particular embodiment, the spring system 17 comprises a spring sleeve and a spring, which is arranged in the spring sleeve.
The lower stiffening wing plate is arranged below the upper stiffening wing plate and surrounds the outer part of the lower edge of the support hoop of the combined structure.
In a further specific aspect, the tie rib plate is connected to the lower stiffening wing plate.
It can also be specific that the inner diameter of the support hoop 15 is set to be larger than the outer diameter of the pier stud.
In a further specific aspect, the spring sleeve is fixedly connected to the lower stiffening wing plate.
In a further specific aspect, the spring sleeve is fixedly welded to the lower stiffening wing plate.
The lower stiffening wing plate below the spring sleeve is connected with a stiffening plate.
In a further specific embodiment, the stiffener is triangular.
In another embodiment, the number of the spring sleeves and the number of the springs are at least two on each side, or not less than six along the circumference.
In a further specific aspect, the spring sleeve and the spring are uniformly distributed on the outer wall of the pier stud.
It may also be specific that the pier stud is a rectangular stud, the slurry storage groove 16 is a rectangular annular groove, the support hoop 15 is a rectangular hoop, and the upper stiffening wing plate and the lower stiffening wing plate are rectangular annular plates.
It can also be specific that the number of the spring sleeves and the number of the springs are respectively eight, and along four sides of the pier stud, two spring sleeves and two springs are arranged on each side.
In a further specific embodiment, a grout stopping belt is connected to the inner edge of the grout blocking plate 18 of the gutter inlet.
Specifically, the slurry retaining groove gutter inlet slurry baffle 18 is annular, and the slurry stopping belt is annular.
Specifically, the slurry blocking plate 18 of the slurry storage tank gutter inlet is rectangular and annular, and the slurry stopping belt is rectangular and annular.
Specifically, the grout stopping belt is welded with the grout baffle 18 of the grout storage groove and the gutter inlet.
More specifically, the vertical side of the slurry storage tank body 16 is formed by the hoop plate of the support hoop 15, and the slurry discharge hole 19 is formed in the top of the hoop plate. Two vertical side edges of the slurry storage tank body 16 are respectively formed by the hoop plates.
In a further specific embodiment, the number of the grout outlet 19 is at least two on each side of the hoop plate, and the holes are evenly distributed.
In a further specific aspect, the slurry outlet 19 is connected to a slurry outlet pipe.
In summary, in the construction method for installing and positioning the bridge precast capping beam in the embodiment, the slurry storage tank at the bottom of the capping beam 14 is made by adopting the hoop system, and the slurry storage tank is fixed on the pier column according to the designed position, so as to provide support for the capping beam 14 to be fully grouted. The track plates of the adjacent gantry crane tracks 3 can be connected by using the connecting plates 4 with six bolt holes 6, and the bolts 5 in the bolt holes 6 on the connecting plates 4 are preferably installed at intervals in the forward and reverse directions in sequence, so that the firm connection of the gantry crane tracks 3 can be ensured. All the travelling wheels of the gantry crane track 3 can be driving wheels, so that the integral travelling capacity of the gantry crane track 3 combination can be improved. All walking wheels of the gantry crane track 3 can be universal wheels, so that the adaptability of the whole gantry crane combination to the non-linear section track can be improved. A supporting hoop 15 is divided into two parts according to the plane size of a pier stud to be processed into a structure of a hoop plate combination, an annular stiffening wing plate is arranged on the upper edge of the supporting hoop 15 to prevent the hoop plate from deforming, tie rib plates and bolt holes are symmetrically arranged on two sides of the pier stud without a water drainage groove, and a bolt rod is arranged in the bolt hole to realize the connection of the tie rib plates and the pier stud. The tie rib plate is connected with the lower part of the supporting hoop, so that the installation is convenient. Its hoop plate integrated configuration's that holds 16 tops of thick liquid groove internal diameter is greater than the planar external diameter dimension of pier stud cross section for after the bolt-up, the integrated configuration cover of hoop plate is established outside the pier stud, is in the lax state, is convenient for hold thick liquid groove 16 and realizes the oscilaltion with the help of spring force. The spring sleeve is welded on the lower stiffening wing plate at the lower part of the supporting hoop 15, and at least two stiffening plates are welded at the lower edge of the lower stiffening wing plate to prevent the lower stiffening wing plate from deforming. A grout stop belt is vertically welded on the inner edge of a grout blocking 18 plate of the grout storage groove rainwater groove, so that the grout storage groove 16 is prevented from moving up and down, and grout leakage at the position of the water drainage groove is avoided. Slurry discharge holes 19 are formed in the periphery of the hoop plate at the top of the slurry storage groove, and the slurry discharge holes 19 can be connected with slurry discharge pipes, so that redundant slurry can be discharged conveniently when the cover beam 14 is used for holding slurry.
In the construction method for installing the bridge precast capping beam in place according to the embodiment, when the gantry crane track 3 is installed in the first step, the method may be as follows: and finishing the basic treatment of the gantry crane track 3 according to the traveling route of the gantry crane. Lay one section of track that can dismantle earlier on the basis, install one section track in the back in proper order, with the accurate butt joint of track. And mounting the connecting plate 4 on the adjacent tracks, wherein the size of the connecting plate 4 is consistent with that of the gantry crane track 3, so that the connecting plate 4 is convenient to mount stably. And after the connecting plate 4 is installed, the high-strength bolts 5 are screwed down, and the installation directions of the bolts 5 are distributed in a staggered manner. And sequentially carrying out the operations until the installation of all the rails required by the gantry crane is finished.
In the construction method for installing the bridge precast capping beam in place according to the embodiment, when the slurry storage tank is installed in the second step, the method may be: the installation holds support staple bolt 15 of dressing trough lower part, will support staple bolt 15 installation level, will support the preliminary fastening of staple bolt. A hard spring is inserted into a spring sleeve on the lower stiffening wing plate. And installing the upper slurry storage tank 16, fastening and supporting a hoop bolt, and observing the height difference between the top of the slurry storage tank 16 and the support steel plate 20 at the top of the pier stud. The height of the supporting anchor ear 15 at the bottom is adjusted to ensure that the top of the upper slurry storage groove 16 is 1cm higher than the supporting steel plate 20 at the top of the pier stud. And rubber strips are pasted along the periphery of the inner side of the grout storage groove, so that no gap is formed between the rubber strips and the pier stud. After the capping beam 13 is preassembled, grouting slurry into the slurry storage groove 16, so that the slurry is higher than the supporting steel plate 20 by 0.5cm, and the subsequent slurry is guaranteed to be compact. And hoisting the cover beam 14 in place, and discharging the excessive slurry from the slurry storage tank 16 through the slurry discharge hole 19, so that the slurry sitting operation is finished.
In the construction method for installing and positioning the bridge precast capping beam according to the above embodiment, when the capping beam 14 is installed in the third step, the following steps may be performed: firstly, a capping beam 14 transport vehicle is installed at a preset position to be parked, the whole gantry crane combined structure is moved to the position above the capping beam 14, a lifting hook falls down, then two crown blocks 13 are synchronously lifted, the gantry crane combined structure is moved on a gantry crane rail 3, so that the whole prefabricated capping beam 14 is stably lifted to the position above a pier stud, then a measurer uses a total station to measure the axis of the capping beam, the transverse position adjustment of the prefabricated capping beam 14 is realized through the relative left-right movement of a transverse rigid main truss 12 on a gantry crane main beam 10, the relative front-back movement of the two crown blocks 13 at the top on the transverse rigid main truss 12 is realized, the alignment adjustment of the axis of the prefabricated capping beam 14 is realized, and finally, the capping beam 14 is stably arranged below after the axis meets the requirement, and the installation of the whole prefabricated capping beam 14 is completed.
The bridge prefabricated bent cap installation in-place construction method and the construction structure can enable the bent cap 14 to be aligned quickly in the installation of the bridge prefabricated bent cap 14, reduce the safety risk of rotation and movement in the installation process of the bent cap 14, solve the problem of synchronism of cooperative operation of multiple devices, improve the installation efficiency, ensure that the bent cap 14 is full in grout, avoid influencing the appearance quality of a pier stud and improve the installation and dismantling efficiency of a grout storage groove.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A bridge precast capping beam installation and in-place construction method is characterized by comprising the following steps:
firstly, installing a gantry crane track (3),
treating the foundation of the gantry crane track (3);
assembling and welding a detachable gantry crane track (3);
connecting adjacent gantry crane rails (3), and connecting 60m gantry crane rails (3) to form a whole;
secondly, installing a slurry storage tank,
arranging a slurry storage groove at the bottom of the bent cap (14), and fixing the slurry storage groove on the pier stud according to a preset position;
thirdly, installing the cover beam,
and hoisting and installing the cover beam (14) by walking the gantry crane on the gantry crane rail (3) and adjusting the relative position of the main truss (12) and the crown block (13).
2. The bridge prefabrication cap beam installation and in-place construction method according to claim 1, characterized in that when the detachable gantry crane track (3) is assembled and welded, the bottom steel plate (1) is connected with the bottom of the supporting I-steel (2), the gantry crane track (3) is placed at the center of the top of the supporting I-steel (2), the gantry crane track (3) is connected with the supporting I-steel (2), and then the detachable gantry crane track (3) is sequentially placed at preset positions according to a lofting line type.
3. The bridge prefabrication cap beam installation and in-place construction method according to claim 1, characterized in that when adjacent gantry crane rails (3) are connected, the adjacent gantry crane rails (3) are connected through a connecting plate (4); at least two bolt holes (6) are formed in the connecting plate (4), and bolts (5) for connecting the gantry crane rail (3) and the connecting plate (4) are arranged in the bolt holes (6); when the bolts (5) on the connecting plate (4) pass through the bolt holes (6), the bolts (5) are sequentially installed at intervals in the positive direction and the negative direction.
4. The bridge precast capping beam installation in place construction method according to claim 1, characterized in that the legs (8) are installed on the gantry crane rail (3); after the gantry crane rails (3) are connected and combined into a whole, two adjacent support legs (8) of the gantry cranes on the gantry crane rails (3) are connected with a linkage device (9), so that the two gantry cranes can synchronously move on the gantry crane rails (3).
5. A bridge precast capping beam in-place construction structure for implementing the bridge precast capping beam in-place construction method according to any one of claims 1 to 4, comprising a foundation and a slurry storage tank (16) provided at the bottom of a capping beam (14), characterized in that a gantry crane rail (3) of a detachable assembly structure is provided on the foundation; the adjacent gantry crane rails (3) are connected; the slurry storage groove (16) is fixed on the pier stud.
6. The bridge prefabrication bent cap installation construction structure in place according to claim 5, characterized in that a gantry crane track (3) is fixedly installed at the center of the top of the supporting I-steel (2), and the bottom of the supporting I-steel (2) is fixedly connected with the bottom steel plate (1); the gantry crane rails (3) are sequentially arranged according to a lofting line type.
7. The bridge precast capping beam in-place construction structure according to claim 5, wherein adjacent gantry crane rails (3) are connected by a connecting plate (4); at least two bolt holes (6) are formed in the connecting plate (4), and bolts (5) for connecting the gantry crane rail (3) and the connecting plate (4) are arranged in the bolt holes (6); bolts (5) on the connecting plate (4) sequentially penetrate through the bolt holes (6) in the positive direction and the negative direction at intervals.
8. The bridge precast capping beam in-place construction structure of claim 5, wherein the gantry crane rail (3) is provided with legs (8); the gantry crane track (3) is connected and combined into a whole, and the supporting legs (8) of the gantry crane track are connected with the linkage device (9) to realize the synchronous movement of the gantry crane system on the track (3).
9. The bridge precast capping beam in-place construction structure according to claim 5, wherein the top transverse steel truss (12) is installed to the main truss (10) at the top of the gantry crane; the top transverse steel truss (12) is arranged on the mobile trolley (11).
10. The bridge precast capping beam in-place construction structure according to claim 5, wherein the overhead traveling crane (13) is provided with traveling wheels and has a hoisting function; the supporting anchor ear (15) and the pulp storage groove body (16) are fixedly connected to the pier stud; the spring system (17) is arranged on the supporting hoop (15) to realize elastic support of the slurry storage tank body (16); the rainwater port pulp blocking plate (18) of the pulp storage tank is connected to one side of the pulp storage tank body, which is positioned on the water flowing tank; the slurry discharging hole (19) is formed in the top of the slurry storage tank body, so that the cover beam is located below the slurry storage tank body (16) to compress the spring system (17) downwards, and redundant slurry is discharged through the slurry discharging hole (19).
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| CN202110143088.2A CN112900280A (en) | 2021-02-02 | 2021-02-02 | Bridge prefabricated bent cap installation in-place construction method and construction structure |
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| CN202110143088.2A CN112900280A (en) | 2021-02-02 | 2021-02-02 | Bridge prefabricated bent cap installation in-place construction method and construction structure |
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