CN116427278A - Large multi-span self-propelled automatic die carrier - Google Patents
Large multi-span self-propelled automatic die carrier Download PDFInfo
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- CN116427278A CN116427278A CN202310348738.6A CN202310348738A CN116427278A CN 116427278 A CN116427278 A CN 116427278A CN 202310348738 A CN202310348738 A CN 202310348738A CN 116427278 A CN116427278 A CN 116427278A
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 167
- 239000010959 steel Substances 0.000 claims abstract description 167
- 238000009415 formwork Methods 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 13
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 26
- 238000000034 method Methods 0.000 abstract description 6
- 238000012546 transfer Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
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- 238000011065 in-situ storage Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
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- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
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- 230000005489 elastic deformation Effects 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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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The invention discloses a large multi-span self-propelled automatic formwork, which is characterized by comprising pre-buried steel plates arranged on upright posts and vertical supports fixed on the pre-buried steel plates, wherein each vertical support is provided with a hoop, each hoop is provided with a plurality of hydraulic jacks and a plurality of unloading blocks, each unloading block is provided with a cross beam, the cross beams are transversely erected along a viaduct, the hoops at the two outer sides of the viaduct are provided with diagonal supports, and the cross beams are provided with steel trusses which can slide to the next linkage after the formwork is lowered. According to the invention, the hydraulic jack and the unloading block are simultaneously arranged on the anchor ear, so that the steel truss can be placed on the cross beam after being lowered, the screw jack is arranged on the cross beam to jack up the steel truss so as to install the longitudinally moving roller at the bottom of the steel truss, each span of the steel truss can be provided with a transfer pin or a shoulder pole beam so as to fix a steel wire rope released by a winch, the steel truss can be automatically slipped after the box girder is poured, the construction process is greatly simplified, the construction period is greatly shortened, and the labor cost is reduced.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a large multi-span self-propelled automatic formwork.
Background
The development of bridge engineering is advanced with time, the requirements on construction technology and construction quality are also higher and higher day by day, the multi-span steel truss structure is widely applied in bridge engineering, the offshore bridge construction can face the limitation of low clearance, the existing steel truss is complicated in structure, after the box girder is poured, workers are required to drill into the bridge bottom to dismantle the steel truss and then install the steel truss into the next bridge, because the bridge is at sea level, the working space of the workers is very narrow, the dismantling and transportation are very inconvenient, the difficulty is very high, the physical quality requirements on the workers are also high, the construction period of the offshore bridge can be long, and the construction cost is high.
The above information disclosed in the background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the large multi-span self-propelled automatic die carrier, the steel truss is not required to be disassembled after the box girder is poured, the steel truss can be directly slipped to the next joint, the construction period can be greatly shortened, and the construction cost can be reduced.
The invention is realized by the following technical scheme:
the utility model provides a large-scale multispan is from automatic die carrier which characterized in that: including establishing the pre-buried steel sheet on stand 3, fixing the perpendicular support 4 on pre-buried steel sheet, be equipped with staple bolt 5 on erecting the support 4, every be equipped with a plurality of hydraulic jack 8 and a plurality of piece 10 that falls of unloading on staple bolt 5, be equipped with crossbeam 7 on the piece 10 that falls of unloading, crossbeam 7 erects along the horizontal of overpass, is equipped with bracing 9 on staple bolt 5 in the two outsides of overpass, can slide to the steel truss 1 of next allies oneself with after being equipped with the falling die on crossbeam 7.
As described above, the large multi-span self-propelled automatic mold frame is characterized in that: each group of steel trusses 1 comprises a plurality of single-truss bailey beams 2, two adjacent single-truss bailey beams 2 are connected through a vertical support frame 101 and a horizontal support frame 102, the single-truss bailey beams 2 are connected with the vertical support frame 101 and the horizontal support frame 102 through bolts, each single-truss bailey beam 2 comprises a plurality of connected bailey pieces 6, two adjacent groups of steel trusses 1 are connected through distribution beams, and each group of steel trusses 1 is connected with the distribution beams through U-shaped bolts.
As described above, the large multi-span self-propelled automatic mold frame is characterized in that: the bailey piece 6 comprises two horizontal chords 601, an end rod 602 for connecting the two chords 601 is arranged at the end part of the chords 601, the two chords 601 and the two end rods 602 enclose a rectangle, a plurality of middle vertical rods 603 for connecting the two chords 601 and a plurality of first diagonal rods 604 are further arranged in the rectangle, two ends of each first diagonal rod 604 are respectively connected to the chords 601 and the end rod 602 or respectively connected to the chords 601 and the middle vertical rods 603, four first diagonal rods 604 connected end to end enclose a diamond, two ends of the chords 601 are respectively provided with a female head and a male head, the female head of one bailey piece 6 is connected with the male head of the other bailey piece 6, and the bailey piece 6 is manufactured by square steel tubes.
As described above, the large multi-span self-propelled automatic mold frame is characterized in that: the cross beam 7 comprises multiple sections, each section is connected through bolts, the cross beam 7 is I45b I-steel, the cross beam 7 is connected with the steel truss 1 through U-shaped bolts, and the transverse limiting devices 12 for limiting the steel truss 1 are arranged on the cross beam 7 and located on the outer side of each group of the steel truss 1.
As described above, the large multi-span self-propelled automatic mold frame is characterized in that: the beam 7 comprises two outer sections 701 and a middle section 702, wherein the outer sections 701 are respectively and symmetrically connected with two ends of the middle section 702 through bolts, two hydraulic jack connecting beams 703 and two diagonal bracing connecting beams 704 are arranged on the outer sections 701, the two hydraulic jack connecting beams 703 are arranged between the two diagonal bracing connecting beams 704, the plates of the outer sections 701 along the length direction of the beam 7 are made of double-spliced steel, and the double-spliced steel is respectively provided with a transverse limiting device base 11, a plurality of jack supports 705, two diagonal bracing connecting beam supports 706, a plurality of hydraulic jack connecting beam supports 707, a plurality of unloading block top plates 709 and end face connecting plates 708.
As described above, the large multi-span self-propelled automatic mold frame is characterized in that: the transverse limiting device 12 comprises a transverse limiting device base 11 and a limiting pulley arranged on the transverse limiting device base.
As described above, the large multi-span self-propelled automatic mold frame is characterized in that: the vertical support 4 comprises four double-spliced rods 401 enclosing the upright posts 3, two adjacent double-spliced rods 401 are connected through connecting rods, a top plate 402 and a bottom plate 403 are respectively arranged at the top and the bottom of each double-spliced rod 401, the bottom plate 403 is welded with the embedded steel plates, and triangular plates are welded on two sides of the top plate 402.
As described above, the large multi-span self-propelled automatic mold frame is characterized in that: the anchor ear 5 is by four same subassembly symmetry splices will stand 3 is held, and the bottom of anchor ear 5 is arranged in on the roof 402, be equipped with four at the top symmetry of anchor ear 5 be used for laying the first installation position 501 of piece 10 falls down, be equipped with the undercut between two first installation positions 501, be used for laying the second installation position 502 of hydraulic jack 8.
As described above, the large multi-span self-propelled automatic mold frame is characterized in that: two hydraulic jacks 8 are arranged on each anchor ear 5, and four unloading blocks 10 are arranged on each anchor ear 5.
As described above, the large multi-span self-propelled automatic mold frame is characterized in that: the anchor ear 5 is equipped with four, is equipped with bracing 9 on anchor ear 5 of both sides, and the upper end of bracing 9 is fixed on crossbeam 7.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the hydraulic jack and the unloading block are simultaneously arranged on the anchor ear, so that the steel truss can be placed on the cross beam after being lowered, the screw jack is arranged on the cross beam to jack up the steel truss so as to install the longitudinally moving roller at the bottom of the steel truss, each span of the steel truss can be provided with a transfer pin or a shoulder pole beam so as to fix a steel wire rope released by a winch, and the structures form a whole, so that the steel truss can automatically slide after the box girder is poured, the construction process is greatly simplified, the construction period is greatly shortened, and the labor cost is reduced.
2. The bailey piece adopts the square tube assembly, and the bailey piece adopting the structure and the material has lighter weight and stronger bearing performance.
3. The beam has multiple functions and high practicability.
Drawings
FIG. 1 is a schematic elevation view of a cast-in-place bracket of the present invention;
FIG. 2 is a schematic plan view of a cast-in-place bracket of the present invention;
FIG. 3 is a schematic cross-sectional view of a cast-in-situ stent of the present invention;
FIG. 4 is a schematic vertical bracing elevational view of the present invention;
FIG. 5 is a schematic plan view of a vertical support of the present invention;
FIG. 6 is an elevational schematic view of a lateral stop device of the present invention;
FIG. 7 is a schematic plan view of a lateral stop device of the present invention;
fig. 8 is a perspective view of the anchor ear of the present invention;
FIG. 9 is a view showing the construction of the positions of the landing block, jack and diagonal brace of the present invention;
FIG. 10 is a side view of the landing block of the present invention;
FIG. 11 is an elevation view of a landing block of the present invention;
fig. 12 is a plan view of a beret sheet of the present invention;
FIG. 13 is a plan view of a side bar of the bailey piece of the present invention;
fig. 14 is a plan view of a bailey piece chord of the present invention;
FIG. 15 is a front view of a beam of the present invention;
FIG. 16 is a top view of a beam of the present invention;
FIG. 17 is a cross-sectional view B-B of FIG. 16;
FIG. 18 is a cross-sectional view A-A of FIG. 16;
FIG. 19 is a front view of the outboard section of the beam of the present invention;
FIG. 20 is a top view of the outboard section of the beam of the present invention;
FIG. 21 is a front view of a double-spliced I-steel beam outer section of the present invention;
FIG. 22 is a top view of a double-spliced I-steel for the outer section of the beam of the present invention;
FIG. 23 is one of the steel truss jacking schematic diagrams of the present invention;
FIG. 24 is a second schematic view of the lifting of a steel truss in accordance with the present invention;
FIG. 25 is a third schematic view of the lifting of the steel truss of the present invention;
FIG. 26 is one of the present invention's mobile mounting schematic;
FIG. 27 is a second schematic diagram of a mobile station installation of the present invention;
FIG. 28 is one of the forward schematic views of the steel truss of the invention;
FIG. 29 is a second schematic view of the advancement of the steel truss of the invention;
fig. 30 is a schematic view of the installation of the electric hoist of the present invention.
In the figure: 1 is a steel truss; 101 is a vertical support frame; 102 is a horizontal support frame; 2 is a single Bailey beam; 3 is a column; 4 is a vertical support; 401 is a double-spelling rod; 402 is a top plate; 403 is a bottom plate; 5 is a hoop; 501 is a first mounting location; 502 is a second mounting location; 6 is beret sheet; 601 is a chord; 602 is a side bar; 603 is a middle vertical rod; 604 a first diagonal; 7 is a cross beam; 701 is the outer section; 702 is an intermediate section; 703 are hydraulic jack contact beams; 704 is a diagonal bracing tie beam; 705 is a jack mount; 706 is a diagonal bracing tie beam mount; 707 is a hydraulic jack contact beam support; 708 is an end face connecting plate; 709 is a drop block top plate; 710 is an upper connection plate; 711 is a lower connecting plate; 712 is an intermediate connection board; 8 is a hydraulic jack; 9 is a diagonal bracing; 10 is a drop block; 11 is a base of the transverse limiting device; 12 is a transverse limiting device; 13 is a screw jack; 14 is a joist; 15 is a winch; 16 is an embedded bolt; 17 is an embedded counter-force frame; 18 is a diverting pulley; 19 is a traction pin; 21 is a side die; 22 is a longitudinally moving roller; 23 is a boom; 24 is an electric hoist; 25 are tracks.
Detailed Description
The technical features of the present invention are described in further detail below with reference to the accompanying drawings so that those skilled in the art can understand the features.
The utility model provides a large-scale multispan is from moving automatic die carrier, including establishing the pre-buried steel sheet on stand 3, fixing on pre-buried steel sheet erect prop 4, be equipped with staple bolt 5 on erecting prop 4, every be equipped with a plurality of hydraulic jack 8 and a plurality of piece 10 that falls on staple bolt 5, be equipped with crossbeam 7 on the piece 10 that falls, crossbeam 7 erects along the transversely of overpass, is equipped with diagonal bracing 9 on staple bolt 5 in the two outsides of overpass, is equipped with on crossbeam 7 and falls the steel truss 1 that can slide to next alliance after the mould.
In this embodiment, there are four columns 3 in a row, so five groups of steel trusses 1 are arranged along the bridge direction, as shown in fig. 2 and 3. The die carrier comprises an embedded steel plate, a vertical support 4, a hoop 5, a hydraulic jack 8, a discharging block 10, a cross beam 7, a steel truss 1, a bottom die and a side die from bottom to top along the upright post 3. Each upright post 3 is provided with a set of vertical support 4 and a hoop 5. The anchor ear 5 holds the stand column 3 tightly through frictional force, and anchor ear 5 is not connected with stand column 3, and crossbeam 7 cross bridge is erect on a plurality of pieces 6 that fall down, and stand column 3 passes from crossbeam 7.
After the box girder tensioning grouting is completed, the whole support is lowered by the hydraulic jack 8 and the unloading block 10, and the steel truss 1 is slipped to the next link in groups for continuous construction. Therefore, the steel truss 1 does not need to be detached and then mounted to the next link, the construction period can be greatly shortened, and the labor cost can be reduced.
As described above, the vertical support 4 comprises four double-spliced rods 401 enclosing the upright posts 3, two adjacent double-spliced rods 401 are connected through connecting rods, top plates 402 and bottom plates 403 are respectively arranged at the top and bottom of the double-spliced rods 401, the bottom plates 403 are welded with the embedded steel plates, and triangular plates are welded at two sides of the top plates 402.
And inclined struts 9 are arranged on the two outer hoops 5, and the tops of the inclined struts 9 are fixed on the cross beam 7. Because the anchor ear 5 on both sides is provided with the diagonal bracing 9, the anchor ear 5 on both sides is different from the anchor ear 5 in the middle in installation mode, and the adaptation is needed to be adjusted, as shown in fig. 3.
In the embodiment, the four same components are symmetrically spliced to hold the upright post 3, the bottom of the anchor ear 5 is arranged on the top plate 402 of the vertical support 4, two hydraulic jacks 8 are arranged on each anchor ear 5, and the specification is 200 tons; the four unloading blocks 10 on each hoop 5 are arranged, the specification is 100 tons or 200 tons, the bottom of each unloading block 6 is provided with a cushion block, and the top of each hydraulic jack 8 is also provided with a cushion block.
Further, four first mounting positions 501 for placing the unloading block 10 are symmetrically arranged at the top of the anchor ear 5, and a second mounting position 502 which is recessed downwards and used for placing the hydraulic jack 8 is arranged between the two first mounting positions 501, as shown in fig. 8 to 11.
As described above, each group of steel trusses 1 includes a plurality of single-truss bailey beams 2, two adjacent single-truss bailey beams 2 are connected through a vertical support frame 101 and a horizontal support frame 102, the single-truss bailey beams 2 are connected with the vertical support frame 101 and the horizontal support frame 102 through bolts, each single-truss bailey beam 2 includes a plurality of continuous bailey pieces 6, two adjacent groups of steel trusses 1 are connected through distribution beams, and each group of steel trusses 1 is connected with the distribution beams through U-shaped bolts, as shown in fig. 2.
Further, the bailey piece 6 includes two horizontal chords 601, an end rod 602 for connecting the two chords 601 is disposed at the end of the chords 601, the two chords 601 and the two end rods 602 enclose a rectangle, a plurality of middle vertical rods 603 and a plurality of first diagonal rods 604 for connecting the two chords 601 are further disposed in the rectangle, two ends of the first diagonal rods 604 are respectively connected to the chords 601 and the end rod 602, or respectively connected to the chords 601 and the middle vertical rods 603, four first diagonal rods 604 connected end to end enclose a diamond shape, two ends of the chords 601 are respectively provided with a female head and a male head, the female head of one bailey piece 6 is connected with the male head of another bailey piece 6 to form a single bailey beam 2, and the bailey piece 6 is made of square steel tubes, as shown in fig. 12 to 14, and the bailey piece adopting the structure and the material is lighter in weight and stronger, and the material cost can be greatly reduced.
The steel truss installation method comprises the following steps:
1. firstly, assembling the bailey pieces 6 into Shanbei bailey beams in a steel assembling area, connecting the two bailey pieces into a single row by using a supporting frame, then transporting the single-row bailey beams to a construction site, then hoisting the single-row bailey beams on the installed cross beam 7 or a support thereof by using an 80t crawler crane in a matched manner, and then splicing the two sections.
2. The steel truss is erected along the forward bridge direction, the single Bailey beams 2 are formed by connecting 17 Bailey sheets 6, and the steel truss is hoisted in place from the inner side to the outer side of the box girder.
3. After the steel truss 1 is assembled, the steel truss is inspected, and whether the truss, the safety pin, the bolt and the support frame are firmly connected is mainly inspected, so that the safety and reliability of the steel truss in the erection and use process are ensured.
4. And finally, placing a transverse distribution beam on the steel truss 1, and firmly connecting the distribution beam and the steel truss 1 by adopting U-shaped bolts to form a steel platform.
5. And after the construction of the steel platform is completed, installing a bottom die and a side die, and forming a bracket. The bottom die adopts steel-wood combination, a 5mm thick steel plate is paved on the top surfaces of the middle three groups of steel trusses 1, and I-steel and bamboo splints are adopted between every two groups of steel trusses 1. Side forms 21 are also provided on the steel trusses 1 on both sides.
As described above, the cross beam 7 comprises multiple sections, each section is connected through bolts, the cross beam 7 adopts I45b I-steel, the cross beam 7 is connected with the steel truss 1 through U-shaped bolts, and the cross beam 7 is provided with a transverse limiting device 12 for limiting the steel truss 1 and positioned on the outer side of each group of the steel truss 1. The transverse limiting device 12 is used for limiting the two outer sides of the steel truss 1 and preventing the steel truss from transverse displacement when sliding forwards.
Further, the lateral stop 12 includes a lateral stop base 11 and a stop pulley disposed thereon, as shown in fig. 6 and 7.
The cross beam 7 may be three or five sections, and the cross beam 7 in this embodiment adopts three sections, including two outer sections 701 and a middle section 702, where the outer sections 701 are symmetrically connected with two ends of the middle section 702 through bolts, as shown in fig. 15 to 18;
two hydraulic jack contact beams 703 and two diagonal bracing contact beams 704 are provided on the outer section 701, the two hydraulic jack contact beams 703 being provided in the middle of the two diagonal bracing contact beams 704, the contact beams being between the contact members, the effect being to increase the structural integrity to increase the transverse or longitudinal stiffness of the building. The hydraulic jack 8 is supported on the hydraulic jack contact beam 703 to hold or lift the cross beam 7, the upper end of the diagonal brace 9 is fixed on the diagonal brace contact beam 704, as shown in fig. 16, the outer sections 701 are respectively a left outer section and a right outer section, the diagonal brace contact beam of the left outer section is called a left diagonal brace contact beam, the diagonal brace contact beam of the right outer section is called a right diagonal brace contact beam, the upper end of the left diagonal brace is fixed on the left diagonal brace contact beam, and the upper end of the right diagonal brace is fixed on the right diagonal brace contact beam.
The steel plate of the outer section 701 along the length direction of the cross beam 7 adopts double-spliced steel, and the double-spliced steel is respectively provided with a transverse limiting device base 11, a plurality of jack supports 705, a diagonal bracing connecting beam support 706, a plurality of hydraulic jack connecting beam supports 707, a plurality of drop block top plates 709 and an end face connecting plate 708. The transverse limiting device base 11 is used for installing the transverse limiting device 12, the jack support 705 is used for installing the screw jack 13, the diagonal bracing connecting beam support 706 is used for installing the diagonal bracing connecting beam 704, two ends of the installation diagonal bracing connecting beam 704 are respectively fixed on the diagonal bracing connecting beam support 706, the hydraulic jack connecting beam support 707 is used for installing the hydraulic jack connecting beam 703, two ends of the hydraulic jack connecting beam 703 are respectively fixed on the hydraulic jack connecting beam support 707, the unloading block 10 is propped against the unloading block top plate 709 to support the cross beam 7, as shown in fig. 21 and 22, and the end face connecting plate 708 is used for connecting the middle section 702.
As shown in fig. 15, the portion of the outer section 701 connected to the intermediate section 702 is provided with an upper connection plate 710, a lower connection plate 710, and an intermediate connection plate 711, and these connection plates are connected by high-strength bolts. The intermediate section 702 differs from the outer section 701 in that the intermediate section 702 is not provided with diagonal bracing beams 704.
The cross beam 7 is formed by splicing multiple sections, is convenient to assemble and disassemble, can be provided with the transverse limiting device 12 for limiting the steel truss 1, the screw jack 13 for jacking the steel truss 1 and the longitudinal moving roller for sliding the steel truss 1, can also support the steel truss 1 and the like, and has various functions and strong practicability.
The box girder of the embodiment is cast in situ on five rows of upright posts 3, so the cast-in-situ box girder is a four-span one-joint, each group of steel trusses 1 comprises a plurality of single-truss bailey girders 2, a horizontal support frame 102 and a vertical support frame 101 which are used for connecting the single-truss bailey girders, the Shanbei bailey girders 2 comprise four spans, and Shanbei bailey girders 2 are formed by connecting a plurality of sections of bailey girders 6. As shown in fig. 2, the first single-span bailey beam is formed by connecting five bailey pieces 6, and the second single-span bailey beam, the Shandi three-span bailey beam and the Shandi four-span bailey beam are formed by connecting four bailey pieces 6, so that the Shanbei bailey beam comprises 17 bailey pieces 6.
The formwork utilizes an original steel trestle as a working surface, adopts a crawler crane, firstly establishes a transverse bridge direction, establishes a second transverse steel truss in a longitudinal bridge direction after the first transverse steel truss is completed, repeats the steps until the last transverse steel truss is completely established, then installs a bottom die, and pre-presses a bracket, so as to reduce non-elastic deformation and ensure the bearing capacity of the bracket, and the pre-pressing weight is not less than 1.1 times of the load of the bracket.
The invention also requests to protect a construction method of the large multi-span self-propelled automatic formwork, and the construction method of the formwork is as follows:
s1, preparation of construction: assembling a plurality of sections of bailey beams 2 into Shanbei bailey beams, connecting the two beams by using a supporting frame, and then transporting to a construction site;
the placement position of the steel member is determined according to the use sequence of the steel member; the steel member marks the positions of weight, gravity center and hanging point before leaving the factory so as to be convenient to hoist and mount; and (3) transporting the steel member to a construction site by using a flat car, and carrying out anti-corrosion coating on the steel member after finishing processing.
S2, construction of the filling pile: the upright post 3 is subjected to concrete pouring twice, and steel plates are embedded in the pile tops during concrete pouring;
s3, manufacturing and installing the upright post vertical support: the vertical support 4 is welded around the upright post 3, and the bottom plate of the vertical support 4 is welded on the embedded steel plate;
s4, manufacturing and installing the upright column hoop: a plurality of components are respectively assembled on the upright posts 3, and the mounting height of the anchor ear 5 is controlled by using a level gauge so as to ensure the elevation of the bracket platform;
s5, installing a discharging block; four unloading blocks 10 are arranged on a first installation position 501 of the anchor ear 5, and two hydraulic jacks 8 are arranged on a second installation position 502 of the anchor ear 5;
s6, mounting a cross beam: the cross beam 7 is hoisted for three times and then connected and fixed, and is supported by the unloading block 10;
s7, mounting the bailey beam and a support frame:
hoisting the bailey beams from the inner side to the outer side of the box beam, accurately hoisting the bailey beams above the cross beam 7, using steel pipes to make temporary diagonal bracing on two sides, dismantling the temporary diagonal bracing after the bailey beams are fixed with the cross beam 7, and connecting and fixing two adjacent bailey beams through the horizontal support frame 102 and the vertical support frame 101; mounting the bailey beams span by span, namely mounting the bailey beams at the second span after the first span is mounted, until the bailey beams at the last span are mounted;
shanbei Lei Liangyou 17 section beret sheet, and after the steel truss is assembled, checking whether the truss, the safety pin, the bolt and the support frame are firmly connected, so that the safety and reliability of the steel truss in the erection and use process are ensured;
s8, mounting a distribution beam: after the first steel truss-spanning frame 1 is installed, transverse distribution beams are placed on the steel truss-spanning frame 1 and are paved at the same interval, and the distribution beams and the steel truss-spanning frame are firmly connected through U-shaped bolts to form a steel platform;
s9, diagonal bracing installation: adjusting the top elevation of the steel truss 1 by using the unloading block 10; installing diagonal braces after finishing;
s10, installing a bottom die and a side die, after the construction of a steel platform is completed, installing the bottom die and the side die 21, wherein the bottom die is combined by steel and wood, and the side die 21 is arranged on the steel truss 1 at the outer side and is used for pouring a box girder;
s11, prepressing a bracket system: the main purpose of the pre-pressing is to eliminate the inelastic deformation of the bracket, check the bearing capacity and stability of the bracket, and the pre-pressing weight is not less than 1.1 times of the die carrier load;
s12, reducing a die: unloading the bailey beam when the concrete strength reaches 100% of the design strength after the box beam prestress tensioning is finished, integrally lowering a bracket system to separate the bailey beam from the box beam, and then removing a drop block 10 by utilizing the cooperation of a hydraulic jack 8 to lower the steel truss 1 and a cross beam 7 on the anchor ear 5;
the die drop is performed twice, the first time: lifting the ejector rod of the hydraulic jack 8 by about 280mm, supporting the cross beam 7, regulating the height of the unloading block 10 by 40mm, retracting the ejector rod of the hydraulic jack 8 to lower the die, and seating the cross beam 7 on the unloading block 10;
removing a cushion block with the height of 5 cm at the top of the hydraulic jack 8, lifting a top rod of the hydraulic jack 8 by about 300mm, supporting the cross beam 7, removing the unloading block 10, retracting the top rod of the hydraulic jack 8 to drop a die, and seating the cross beam 7 on the anchor ear 5 to finish die-dropping operation;
the first die-lowering hydraulic jack 8 only holds the cross beam 7, but not lifts the cross beam 7, and the hydraulic jack 8 cannot lift the box beam because the box beam is too heavy and fixed on the upright 3 on the steel truss 1. The first time the beam 7, the steel truss 1, etc. are lowered away from the box girder, and the second time the hydraulic jack 8 slightly lifts up the beam 7 before the dump block 10 is removed.
S13, removing the mold, removing the wood bottom mold and the distribution beams between the longitudinal columns, orderly placing the distribution beams and the templates on the tops of the steel templates at two sides, and temporarily fixing the steel templates by using binding belts, as shown in FIG. 23;
s14, repeating the steps S2 to S6 on the next beam section to be poured;
s15, the steel truss moves forward, limiting devices 12 are arranged on the cross beam 7 and located on two sides of the steel truss 1 to keep the advancing direction of the steel truss 1, the middle steel truss is moved firstly when the steel truss moves, after the steel truss moves in place, the middle steel truss is fixed with the cross beam 7, and then the outer steel truss is moved.
A plurality of jack supports 705 are arranged on the outer side of the cross beam 7, the jack supports 705 are used for installing screw jacks 13, joists 14 are arranged at the bottom of the cross beam 7, and the screw jacks 13 are propped against the joists 14 to enlarge the stressed area.
The steel truss 1 is lifted before sliding, and the lifting steps are as follows:
the first step: dismantling the side die 21 and the special-shaped I-shaped steel die, and conveying to the next span by using a flat car; the I-steel wood pattern after the center pillar is removed and placed on the adjacent steel mould, the joist 14 is padded at the bottom of the cross beam 7, the screw jack 13 is propped against the joist 14 to jack up the steel truss 1, and the steel truss is ready to be lifted up group by group and span by span, as shown in fig. 23.
And a second step of: a group of steel trusses 1 is lifted by 10cm by a screw jack 13, a longitudinally moving roller 22 is mounted on a cross beam 7 to reduce friction force when the steel trusses 1 slide, the screw jack 13 is lowered to seat the group of steel trusses 1 on the longitudinally moving roller 22, and then the screw jack 13 and the joist 14 are removed, as shown in fig. 24 and 25. Since the screw jacks 13 and the joists 14 are located outside the cross beam 7, the mounting of the longitudinal moving roller 22 on the cross beam 7 is not affected.
Before construction, the support anchor ear 5, the cross beam 7 and the longitudinal moving roller 22 on the next column 3 are installed, and the elevation is adjusted.
In this embodiment, there are five steel trusses 1 in total, and the sliding method of each steel truss 1 is the same.
Firstly, two winches 15 are parked at the front end of a poured beam section, the winches 15 are fixed through pre-buried bolts 16, pre-buried counter-force frames 17 are arranged at the side parts of the front end of the poured beam section, two diverting pulleys 18 are respectively arranged on the pre-buried counter-force frames 17 along the up-down direction, traction through pins 19 are arranged at two sides of a group of steel trusses 1, and a group of traction through pins 19 are arranged at each span, as shown in fig. 26 and 27;
then paying out the steel wire ropes from the windlass 15, winding the steel wire ropes around the steering pulley 18, and reversely stretching and fixing the steel wire ropes on the windlass 15 on the traction through pins 19 on two sides respectively;
finally, starting a winch 15, driving the steel truss set 1 to move forward for one span by the steel wire rope, supporting the front end of the steel truss set 1 on a longitudinal moving roller 22 of the next cross beam 7, ensuring that the steel truss set 1 does not deviate when moving forward by a limiting pulley, detaching the steel wire rope and locking the steel truss set 1 on a traction through pin 19 of a third span, generally sliding for four times, and taking out a schematic diagram of the first sliding, taking out a schematic diagram of the second sliding, lifting the steel truss set 1 by a next screw jack 13 and a joist 14 after four spans move forward, detaching the longitudinal moving roller 22 on the next cross beam 7, placing the steel truss set 1 on the next cross beam 7, fixing the steel truss set 1 on the cross beam 7 by a U-shaped bolt, and detaching the screw jack 13 and the joist 14.
The towing pin 19 may also be replaced by a shoulder pole beam. The first group of steel trusses in the middle are slipped firstly, the second group of steel trusses and the third group of steel trusses in the middle are slipped secondly, and finally, the steel trusses 1 on two sides are slipped, when the steel trusses 1 on two sides are slipped, the two windlass 15 above are closer, as shown in fig. 27.
S16, dismantling a steel structure below the steel truss 1, taking out a plug after concrete pouring, installing a suspender 23, installing a track 25 on the suspender 23, arranging two electric hoists 24 on the track 25, manually dismantling the cross beam 7, the anchor ear 5 and the vertical support 4, and transporting out the steel structure to two sides of the box girder through the electric hoists 24;
two-ton loop chain type electric hoists are arranged on each track 25, and the reason that two electric hoists 24 are arranged on the tracks 25 is that the detached cross beam is longer, and the two electric hoists 24 are required to be matched for transportation; after completion, the boom 23 is removed, and the pit is filled and repaired with epoxy resin mortar.
S17, entering the next section for construction.
Claims (10)
1. The utility model provides a large-scale multispan is from automatic die carrier which characterized in that: including establishing pre-buried steel sheet on stand (3), fixing on pre-buried steel sheet erect prop (4), be equipped with staple bolt (5) on erect prop (4), every be equipped with a plurality of hydraulic jack (8) and a plurality of piece (10) that drop on staple bolt (5), be equipped with crossbeam (7) on piece (10) that drop, transversely erect along the overpass crossbeam (7), be equipped with bracing (9) on staple bolt (5) in the two outsides of overpass, be equipped with on crossbeam (7) and drop behind the mould can slide to steel truss (1) of next antithetical couplet.
2. The large multi-span self-propelled automatic formwork of claim 1, wherein: each group of steel trusses (1) comprises a plurality of single-truss Bailey beams (2), two adjacent single-truss Bailey beams (2) are connected through a vertical support frame (101) and a horizontal support frame (102), the single-truss Bailey beams (2) are connected with the vertical support frame (101) and the horizontal support frame (102) through bolts, each single-truss Bailey beam (2) comprises a plurality of continuous Bailey sheets (6), two adjacent groups of steel trusses (1) are connected through distribution beams, and each group of steel trusses (1) is connected with the distribution beams through U-shaped bolts.
3. The large multi-span self-propelled automatic formwork of claim 2, wherein: the bailey piece (6) comprises two horizontal chords (601), end rods (602) for connecting the two chords (601) are arranged at the end parts of the chords (601), the two chords (601) and the two end rods (602) form a rectangle, a plurality of middle vertical rods (603) for connecting the two chords (601) and a plurality of first diagonal rods (604) are further arranged in the rectangle, two ends of each first diagonal rod (604) are respectively connected to the chords (601) and the end rods (602) or respectively connected to the chords (601) and the middle vertical rods (603), four first diagonal rods (604) connected end to end form a diamond, female heads and male heads are respectively arranged at two ends of the chords (601), female heads of one bailey piece (6) are connected with male heads of another bailey piece (6), and the bailey piece (6) is manufactured by adopting square steel tubes.
4. The large multi-span self-propelled automatic formwork of claim 1, wherein: the cross beam (7) comprises multiple sections, each section is connected through bolts, the cross beam (7) is made of I45b I-steel, the cross beam (7) is connected with the steel truss (1) through U-shaped bolts, and the transverse limiting devices (12) for limiting the steel truss (1) are arranged on the cross beam (7) and located on the outer sides of each group of the steel truss (1).
5. The large multi-span self-propelled automatic formwork of claim 4, wherein: the beam (7) comprises two outer side sections (701) and a middle section (702), the outer side sections (701) are respectively and symmetrically connected with two ends of the middle section (702) through bolts, two hydraulic jack connecting beams (703) and two diagonal bracing connecting beams (704) are arranged on the outer side sections (701), the two hydraulic jack connecting beams (703) are arranged between the two diagonal bracing connecting beams (704), double-spliced steel is adopted for plates of the outer side sections (701) along the length direction of the beam (7), and transverse limiting device bases (11), a plurality of jack supports (705), two diagonal bracing connecting beam supports (706), a plurality of hydraulic jack connecting beam supports (707), a plurality of unloading block top plates (709) and end face connecting plates (708) are respectively arranged on the double-spliced steel.
6. The large multi-span self-propelled automatic mold frame according to claim 5, wherein: the transverse limiting device (12) comprises a transverse limiting device base (11) and a limiting pulley arranged on the transverse limiting device base.
7. The large multi-span self-propelled automatic formwork of claim 1, wherein: the vertical support (4) comprises four double-spliced rods (401) which enclose the upright posts (3), two adjacent double-spliced rods (401) are connected through connecting rods, top plates (402) and bottom plates (403) are respectively arranged at the top and the bottom of the double-spliced rods (401), the bottom plates (403) are welded with the embedded steel plates, and triangular plates are welded on two sides of the top plates (402).
8. The large multi-span self-propelled automatic formwork of claim 7, wherein: the anchor ear (5) is held by four same subassembly symmetry splices with stand (3), and the bottom of anchor ear (5) is arranged in on roof (402), be equipped with four at the top symmetry of anchor ear (5) be used for laying first installation position (501) of piece (10) falls down, be equipped with the undercut between two first installation positions (501), be used for laying second installation position (502) of hydraulic jack (8).
9. The large multi-span self-propelled automatic formwork of claim 1, wherein: two hydraulic jacks (8) are arranged on each anchor ear (5), and four unloading blocks (10) are arranged on each anchor ear (5).
10. The large multi-span self-propelled automatic formwork of claim 1, wherein: the anchor clamps (5) are provided with four, inclined struts (9) are arranged on the anchor clamps (5) on two sides, and the upper ends of the inclined struts (9) are fixed on the cross beam (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310348738.6A CN116427278A (en) | 2023-03-30 | 2023-03-30 | Large multi-span self-propelled automatic die carrier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310348738.6A CN116427278A (en) | 2023-03-30 | 2023-03-30 | Large multi-span self-propelled automatic die carrier |
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| Publication Number | Publication Date |
|---|---|
| CN116427278A true CN116427278A (en) | 2023-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310348738.6A Pending CN116427278A (en) | 2023-03-30 | 2023-03-30 | Large multi-span self-propelled automatic die carrier |
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| CN (1) | CN116427278A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116988392A (en) * | 2023-08-04 | 2023-11-03 | 中国建筑第五工程局有限公司 | A kind of Bailey beam support |
-
2023
- 2023-03-30 CN CN202310348738.6A patent/CN116427278A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116988392A (en) * | 2023-08-04 | 2023-11-03 | 中国建筑第五工程局有限公司 | A kind of Bailey beam support |
| CN116988392B (en) * | 2023-08-04 | 2025-09-23 | 中国建筑第五工程局有限公司 | Bailey beam bracket |
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Inventor after: Tian Renlan Inventor after: Liu Zhengxin Inventor after: Wang Zhe Inventor after: Zhu Weide Inventor after: Li Wanping Inventor after: Mao Zhenchao Inventor after: Li Jinru Inventor after: Zhou Xiang Inventor before: Tian Renlan Inventor before: Liu Zhengxing Inventor before: Wang Zhe Inventor before: Zhu Weide Inventor before: Li Wanping Inventor before: Mao Zhenchao Inventor before: Li Jinru Inventor before: Zhou Xiang |
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Effective date of registration: 20240809 Address after: Card 20-22, 1st floor, building 4, 28 Huoju Road, Torch Development Zone, Zhongshan City, Guangdong Province, 528400 Applicant after: GUANGDONG GUOZHE AUTOMATION EQUIPMENT CO.,LTD. Country or region after: China Applicant after: THE GUANGDONG NO.3 WATER CONSERVANCY AND HYDRO-ELECTRIC ENGINEERING BOARD Co.,Ltd. Address before: Card 20-22, 1st floor, building 4, 28 Huoju Road, Torch Development Zone, Zhongshan City, Guangdong Province, 528400 Applicant before: GUANGDONG GUOZHE AUTOMATION EQUIPMENT CO.,LTD. Country or region before: China |