CN113981795A - Steel-concrete composite beam and sliding walking type integral pushing installation process thereof - Google Patents
Steel-concrete composite beam and sliding walking type integral pushing installation process thereof Download PDFInfo
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- CN113981795A CN113981795A CN202111138536.6A CN202111138536A CN113981795A CN 113981795 A CN113981795 A CN 113981795A CN 202111138536 A CN202111138536 A CN 202111138536A CN 113981795 A CN113981795 A CN 113981795A
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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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- 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
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for 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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention discloses a reinforced concrete composite beam which comprises two suspension bridge panels, two inter-box cross beams and three narrow steel boxes, wherein the three narrow steel boxes are arranged in parallel, two adjacent narrow steel boxes are connected through the inter-box cross beams, the inter-box bridge panels are arranged at the tops of the three narrow steel boxes, the two suspension bridge panels are respectively arranged at the tops of the two outer narrow steel boxes, and the two suspension bridge panels are arranged at two sides of the inter-box bridge panels. The invention also discloses a sliding walking type integral pushing installation process for the steel-concrete composite beam, which comprises the steps of support erection, steel-concrete composite beam hoisting, guide beam installation, first pushing and the like. According to the invention, the installation of the over-line beam is completed by three times of hoisting and two times of pushing, the erection length of the temporary support is reduced, the use amount of the temporary support and pushing equipment is reduced, the construction cost is reduced, and the construction difficulty is reduced.
Description
Technical Field
The invention relates to the technical field of road and bridge construction, in particular to a steel-concrete composite beam and a sliding walking type integral pushing installation process thereof.
Background
With the continuous improvement of the design and construction technology level of bridges in China, a large number of continuous steel box girder bridges are developed in the fields of highways, urban traffic, railways and the like. The pushing method is widely applied to the construction because of the advantages of small occupied area, no influence on the traffic under the bridge, no need of large hoisting machines, safety, reliability, low cost and the like. The pushing construction method is that a prefabricated field is arranged behind a bridge abutment along the axial direction of a bridge, and a steel guide beam, a temporary pier, a slideway, a horizontal jack (also called a pushing power device or a pushing force application device) and the like are arranged.
The existing overpass bridge pushing construction is as follows: the span line beam is assembled on the temporary support at one time, and then jacking is carried out through jacking equipment on the temporary support. Such a construction method has the following problems: the span beam is assembled at one time, the erection length (the number of temporary supports) of the temporary supports needs to be increased, and meanwhile, the pushing equipment matched with the temporary supports is correspondingly increased, so that the construction cost is increased, and the construction difficulty is increased.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a steel-concrete composite beam and a sliding walking type integral pushing installation process thereof.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a reinforced concrete composite beam, is including hanging decking, case crossbeam and three narrow width steel case between, three narrow width steel case parallel arrangement, two adjacent narrow width steel cases pass through the case crossbeam and connect, the decking sets up threely between the case the top of narrow width steel case, it has two to hang the decking, two hang the decking and set up respectively at the top of two narrow width steel cases in the outside, two it sets up to hang the decking the both sides of decking between the case.
Further, the narrow width steel case is straight web structure, the narrow width steel case includes roof, bottom plate, web and web rib, and the web is straight board structure, the web sets up between roof and the bottom plate, the web rib with the web is connected.
A sliding walking type integral pushing installation process for a steel-concrete composite beam uses a pushing system to install a rigid composite beam,
the pushing system comprises a first support, two second supports, a third support, a fourth support and a plurality of sets of pushing equipment; the first support, the third support and the fourth support are sequentially arranged, one second support is arranged between the first support and the third support, and the other second support is arranged between the third support and the fourth support; the sleeve pushing equipment is uniformly arranged on the two second supports, the third support and the fourth support;
the first support comprises six first stand columns and two first cross beams, the six first stand columns form a first cuboid framework, the length and the width of the first cuboid framework are respectively composed of three first stand columns and two first stand columns, a horizontal first transverse connecting rod and an inclined first inclined supporting rod are respectively arranged between every two adjacent first stand columns, and the two first cross beams are respectively arranged on the three first stand columns in the length direction of the first cuboid framework;
the second support comprises a second cross beam, six second vertical columns and three first longitudinal beams, the six second vertical columns form a second cuboid framework, the length and the width of the second cuboid framework are respectively composed of the three second vertical columns and the two second vertical columns, a horizontal second cross connecting rod and an inclined second inclined supporting rod are respectively arranged between every two adjacent second vertical columns, the first longitudinal beams are arranged on the two second vertical columns in the width direction of the second cuboid framework, and the second cross beam is arranged on the first longitudinal beams;
the third support comprises a third cross beam, nine third vertical columns and three second longitudinal beams, the nine third vertical columns form a third cuboid frame, the length and the width of the third cuboid frame are respectively composed of the three third vertical columns, a horizontal third cross connecting rod and an inclined third inclined strut are respectively arranged between every two adjacent third vertical columns, the second longitudinal beams are arranged on two point vertical columns in the width direction of the third cuboid frame, the second cross beam is arranged on the first longitudinal beam, and the third cross beam is arranged on the second longitudinal beam;
the fourth support comprises six fourth stand columns, a fourth cross beam and three third longitudinal beams, the six fourth stand columns form a fourth cuboid framework, the length and the width of the fourth cuboid framework are respectively composed of three fourth stand columns and two fourth stand columns, two adjacent fourth stand columns are connected through a horizontal fourth transverse connecting rod, and an inclined fourth inclined supporting rod is arranged between the two adjacent stand columns; the third longitudinal beams are arranged on two fourth vertical columns in the width direction of the fourth cuboid frame, and the fourth cross beams are arranged on the three third longitudinal beams. Wherein, a plurality of sets of pushing equipment are respectively arranged on the third support, the fourth support and the two second supports;
the method comprises the following steps:
s1, setting a support: building a temporary support, building a construction platform on the temporary support, and installing a pushing device on the construction platform;
s2, hoisting the steel-concrete composite beam: using E, F, G three beam sections as a first hoisting unit, hoisting the first hoisting unit to a temporary support, and connecting E, F, G three beam sections into an integrated structure;
s3, installing guide beams: hoisting the guide beam to the temporary support, and connecting the guide beam with the front end of the first hoisting unit;
s4, first pushing: pushing the guide beam and the first hoisting unit in place through pushing equipment;
s5, assembling the steel-concrete composite beam for the first time: using H, I two beam sections as second hoisting units, hoisting the second hoisting units to the temporary support, and connecting the second hoisting units with the first hoisting units to integrate E, F, G, H, I five beam sections;
s6, assembling the steel-concrete composite beam for the second time: using J, K, L three beam sections as a third hoisting unit, hoisting the third hoisting unit to the temporary support, and connecting the third hoisting unit with the second hoisting unit to integrate E, F, G, H, I, J, K, L eight beam sections;
s7, second pushing: pushing E, F, G, H, I, J, K, L eight beam sections and guide beams to a proper position by pushing equipment;
s8, dismantling the guide beam: e, F, G, H, I, J, K, L eight beam section beams after the guide beam is removed;
s9, hoisting the rest beam sections: hoisting the rest beam segments in place in sequence;
and S10, removing the bracket.
Further, the jacking device comprises a mechanical system, a pressure system and a control system,
the mechanical system comprises a jacking oil cylinder, an upper sliding mechanism, a pushing oil cylinder, a deviation-correcting oil cylinder, a guide mechanism and a lower supporting mechanism, wherein the guide mechanism is guide rails symmetrically arranged on two sides of the upper end of the lower supporting mechanism;
the pressure system is a synchronous control hydraulic pump station which is connected with the jacking oil cylinder, the pushing oil cylinder and the deviation rectifying oil cylinder through hydraulic pipelines;
the control system comprises a displacement sensor, electromagnetic valves, a control substation and a remote terminal, wherein the displacement sensor is provided with at least three sensors which are respectively used for monitoring the displacement of the jacking oil cylinder, the deviation rectifying oil cylinder and the jacking oil cylinder, and the electromagnetic valves are connected with the hydraulic pipeline; the displacement sensor is electrically connected with the control substation, the electromagnetic valve is electrically connected with the control substation, the hydraulic pump station is electrically connected with the control substation, and the control substation is in communication connection with the remote terminal.
The upper portion glide machanism includes sliding bottom plate, the supporting box and the top layer board of rectifying, sliding bottom plate with lower part supporting mechanism's upper end sliding connection, sliding bottom plate is last to be equipped with two limiting plates, two form the recess that is used for installing the supporting box of rectifying between the limiting plate, the supporting box of rectifying can follow the gliding setting of perpendicular to sliding bottom plate advancing direction and be in the recess, the top layer board with the supporting box of rectifying is connected.
Further, in step S3, the guide beam is bolted to the first hoisting unit.
Further, after step S2 is completed, the plane position of the beam segment is adjusted by setting a horizontal jack.
Furthermore, after the plane position of the beam section is adjusted, the vertical direction of the beam section is adjusted by arranging a vertical jack.
Further, step S3 further includes the following steps:
s31, the height of the cushion block on the construction platform is reduced, and the guide beam is moved to enable the front end of the guide beam to cross the pushing equipment;
s32, arranging a jack on the pushing equipment, and jacking the front end of the guide beam through the jack;
s33, arranging a support stack on the pushing equipment, and supporting the guide beam by the support stack after the jack is removed;
s34, pushing the first hoisting unit to enable the bottom of the guide beam to reach the upper part of the pushing equipment.
Further, step S8 further includes the following steps:
s81, jacking the steel-concrete composite beam by a jacking oil cylinder of the jacking equipment to ensure that the steel cushion block at the positions of the steel-concrete composite beam and the cushion beam is empty;
s82, taking down a layer of steel cushion blocks, and after the steel cushion blocks are taken down, the steel-concrete composite beam integrally descends to enable the steel-concrete composite beam to be supported on the steel cushion blocks again;
s83, returning oil to the jacking oil cylinder to enable the plunger of the jacking oil cylinder to be separated from the beam bottom of the reinforced concrete composite beam, and after a layer of steel cushion block on the jacking oil cylinder is taken down, the plunger of the jacking oil cylinder is tightly jacked with the beam bottom again;
and S84, repeating the steps S81, S82 and S83 until the steel-concrete composite beam falls down on the support.
The invention has the beneficial effects that:
according to the invention, the installation of the over-line beam is completed by three times of hoisting and two times of pushing, the erection length of the temporary support is reduced, the use amount of the temporary support and pushing equipment is reduced, the construction cost is reduced, and the construction difficulty is reduced.
Drawings
FIG. 1 is a front view of a first bracket in an embodiment of the invention;
FIG. 2 is a front view of a second bracket in an embodiment of the invention;
FIG. 3 is a side view of a second bracket in an embodiment of the invention;
FIG. 4 is a front view of a third bracket in an embodiment of the invention;
FIG. 5 is a front view of a fourth bracket in an embodiment of the present invention;
FIG. 6 is a schematic view of the overall structure of the steel-concrete composite beam structure according to the embodiment of the present invention;
FIG. 7 is an exploded view of a narrow steel box and an inter-box beam according to an embodiment of the present invention;
FIG. 8 is a perspective view of a steel-concrete composite beam structure according to an embodiment of the present invention;
FIG. 9 is a schematic view of the overall structure of the mechanical system in the embodiment of the present invention;
FIG. 10 is a schematic block diagram of the structure of a control system in an embodiment of the present invention;
FIG. 11 is a schematic structural diagram of an upper sliding structure according to an embodiment of the present invention;
fig. 12 is a diagram illustrating a state of use of the first to fourth brackets in the embodiment of the present invention;
FIG. 13 is a schematic illustration of E, F, G beam segments and guide beam hoist assemblies according to an embodiment of the invention;
FIG. 14 is a schematic illustration of the hoisting of H, I, J, K, L beam segments according to an embodiment of the invention;
FIG. 15 is a schematic illustration of the case beam pushed in place in an embodiment of the present invention;
FIG. 16 is a schematic diagram of hoisting of the remaining steel box girders in the embodiment of the invention;
FIG. 17 is a schematic view of a bridge according to an embodiment of the present invention;
FIG. 18 is a first schematic view of an upper pier of a guide beam according to an embodiment of the present invention;
FIG. 19 is a second schematic view of an upper pier of a guide beam according to an embodiment of the invention;
FIG. 20 is a third schematic view of an upper pier of a guide beam according to an embodiment of the invention;
FIG. 21 is a fourth schematic view of an upper pier of a guide beam according to an embodiment of the invention;
FIG. 22 is a first schematic view of a beam drop according to an embodiment of the present invention;
FIG. 23 is a second schematic view of a beam drop according to an embodiment of the present invention;
FIG. 24 is a third schematic view of a beam drop according to an embodiment of the present invention;
FIG. 25 is a fourth schematic view of a drop beam in an embodiment of the present invention;
in the figure, 1, a first bracket; 2. a second bracket; 3. a third support; 4. a fourth bracket; 5. pushing equipment; 6. a first upright post; 7. a first cross member; 8. a first cross link; 9. a first diagonal brace; 10. a second cross member; 11. a second upright post; 12. a first stringer; 13. a second cross link; 14. a second diagonal brace; 15. a third cross member; 16. a third column; 17. a second stringer; 18. a third cross link; 19. a third diagonal brace rod; 20. a fourth column; 21. a fourth cross member; 22. a third stringer; 23. a fourth cross link; 24. a fourth diagonal brace; 25. a suspension bridge panel; 26. a steel-concrete composite beam; 27. an inter-tank beam; 28. a narrow steel box; 29. a top plate; 30. a base plate; 31. a web; 32. a web rib; 33. a jacking oil cylinder; 34. an upper sliding mechanism; 35. a pushing oil cylinder; 36. a deviation rectifying oil cylinder; 37. a guide mechanism; 38. a lower support mechanism; 39. a hydraulic line; 40. synchronously controlling a hydraulic pump station; 41. a displacement sensor; 42. an electromagnetic valve; 43. a control substation; 44. a sliding bottom plate; 45. a deviation rectifying support box; 46. a top pallet; 47. a rectangular block; 48. a wedge block; 49. a remote terminal; 50. a box bridge deck; 51. supporting a stack; 52. and (5) a steel cushion block.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1 to 25, the present invention provides a technical solution:
example (b):
as shown in fig. 6 to 8, the reinforced concrete composite beam comprises a suspended bridge deck 25, inter-box bridge decks 50, inter-box beams 27 and three narrow steel boxes 28, wherein the three narrow steel boxes 28 are arranged in parallel, two adjacent narrow steel boxes 28 are connected through the inter-box beams 27, the inter-box bridge deck 50 is arranged at the tops of the three narrow steel boxes 28, the number of the suspended bridge decks 25 is two, the two suspended bridge decks 25 are respectively arranged at the tops of the two outer narrow steel boxes 28, and the two suspended bridge decks 25 are arranged at two sides of the inter-box bridge deck 50.
Narrow width steel case 28 is straight web 31 structure, narrow width steel case 28 includes roof 29, bottom plate 30, web 31 and web 31 rib, and web 31 is straight board structure, web 31 sets up between roof 29 and the bottom plate 30, web 31 rib with web 31 is connected.
A sliding walking type integral pushing system for a steel-concrete composite beam is shown in figures 1-5 and comprises a first support 1, two second supports 2, a third support 3, a fourth support 4 and a plurality of sets of pushing equipment 5; the first bracket 1, the third bracket 3 and the fourth bracket 4 are sequentially arranged (the first bracket 1, the third bracket 3 and the fourth bracket 4 respectively correspond to ZJ1, ZJ3 and ZJ4 in the figure), one second bracket 2 is arranged between the first bracket 1 and the third bracket 3 (in the figure, ZJ 2), and the other second bracket 2 is arranged between the third bracket 3 and the fourth bracket 4 (in the figure, ZJ 5); 24 sets of pushing equipment 5 are uniformly arranged on the two second supports 2, the third support 3 and the fourth support 4;
the first support 1 comprises six first vertical columns 6 and two first cross beams 7, the six first vertical columns 6 form a first cuboid frame, the length and the width of the first cuboid frame are respectively composed of three first vertical columns 6 and two first vertical columns 6, a horizontal first cross connecting rod 8 and an inclined first inclined supporting rod 9 are respectively arranged between every two adjacent first vertical columns 6, and the two first cross beams 7 are respectively arranged on the three first vertical columns 6 in the length direction of the first cuboid frame;
the second bracket 2 comprises a second cross beam 10, six second upright posts 11 and three first longitudinal beams 12, the six second upright posts 11 form a second cuboid frame, the length and the width of the second cuboid frame are respectively composed of the three second upright posts 11 and the two second upright posts 11, a horizontal second cross link 13 and an inclined second inclined strut 14 are respectively arranged between every two adjacent second upright posts 11, the first longitudinal beams 12 are arranged on the two second upright posts 11 in the width direction of the second cuboid frame, and the second cross beam 10 is arranged on the first longitudinal beams 12;
the third support 3 comprises a third cross beam 15, nine third upright posts 16 and three second longitudinal beams 17, the nine third upright posts 16 form a third rectangular parallelepiped frame, the length and the width of the third rectangular parallelepiped frame are respectively composed of the three third upright posts 16, a horizontal third cross link 18 and an inclined third inclined strut 19 are respectively arranged between every two adjacent third upright posts 16, the second longitudinal beams 17 are arranged on two point upright posts in the width direction of the third rectangular parallelepiped frame, the second cross beam 10 is arranged on the first longitudinal beam 12, and the third cross beam 15 is arranged on the second longitudinal beams 17;
the fourth support 4 comprises six fourth vertical columns 20, a fourth cross beam 21 and three third longitudinal beams 22, the six fourth vertical columns 20 form a fourth rectangular parallelepiped frame, the length and the width of the fourth rectangular parallelepiped frame are respectively composed of three fourth vertical columns 20 and two fourth vertical columns 20, two adjacent fourth vertical columns 20 are connected through a horizontal fourth cross link rod 23, and an inclined fourth inclined strut 24 is further arranged between the two adjacent vertical columns; the third longitudinal beams 22 are arranged on two fourth vertical columns 20 in the width direction of the fourth rectangular parallelepiped frame, and the fourth cross beams 21 are arranged on the three third longitudinal beams 22. Wherein, 3 sets of pushing equipment 5 are respectively arranged on the third support 3, the fourth support 4 and the two second supports 2.
A jacking device, as shown in figures 9-11, comprising a mechanical system, a pressure system and a control system,
the mechanical system comprises a jacking cylinder 33, an upper sliding mechanism 34, a jacking cylinder 35, a deviation rectifying cylinder 36, a guide mechanism 37 and a lower supporting mechanism 38, wherein the guide mechanism 37 is a guide rail symmetrically arranged on two sides of the upper end of the lower supporting mechanism 38, the upper sliding mechanism 34 is in sliding connection with the upper end of the lower supporting mechanism 38, the jacking cylinder 33 is arranged at the bottom of the lower supporting mechanism 38, the jacking cylinder 35 is arranged on the lower supporting mechanism 38, the piston end of the jacking cylinder 35 is connected with the upper sliding mechanism 34, and the deviation rectifying cylinder 36 is connected with the upper sliding mechanism 34;
the pressure system is a synchronous control hydraulic pump station 40 connected with the jacking oil cylinder 33, the jacking oil cylinder 35 and the deviation rectifying oil cylinder 36 through a hydraulic pipeline 39;
the control system comprises a displacement sensor 41, an electromagnetic valve 42, a control substation 43 and a remote terminal 49, wherein the displacement sensor 41 is provided with at least three sensors respectively used for monitoring the displacement of the jacking oil cylinder 35, the deviation rectifying oil cylinder 36 and the jacking oil cylinder 33, and the electromagnetic valve 42 is connected with the hydraulic pipeline 39; the displacement sensor 41 is electrically connected with the control substation 43, the electromagnetic valve 42 is electrically connected with the control substation 43, the hydraulic pump station is electrically connected with the control substation 43, and the control substation 43 is in communication connection with the remote terminal 49.
The upper portion glide machanism 34 includes sliding bottom plate 44, support case 45 and top layer board 46 of rectifying, sliding bottom plate 44 with the upper end sliding connection of lower part supporting mechanism 38, be equipped with two limiting plates on the sliding bottom plate 44, two form the recess that is used for installing the support case 45 of rectifying between the limiting plate, the support case 45 of rectifying can follow the gliding setting of perpendicular to sliding bottom plate 44 advancing direction and be in the recess, top layer board 46 with the support case 45 of rectifying is connected.
Be equipped with rectangular block 47 on lower part supporting mechanism 38, rectangular block 47 is equipped with the top and pushes away hydro-cylinder 35 installation cavity, top pushes away hydro-cylinder 35 and sets up in the top pushes away hydro-cylinder 35 installation cavity, be equipped with wedge 48 on the glide machanism 34 of upper portion, wedge 48 is equipped with the holding tank that can hold rectangular block 47.
When the beam structure of the overpass is installed: as shown in fig. 12-25, the beam segments of the over-line beam are first hoisted three times and pushed in place twice. During hoisting, the hoisting is carried out in the order of right amplitude first and left amplitude second, and during pushing, the left amplitude and the right amplitude are carried out simultaneously. E, F, G three beam sections are hoisted to the temporary support for the first time, the three beam sections are welded into a whole, and the guide beam is hoisted to be connected with the front ends of the three beam sections. After the guide beam and the E, F, G beam sections are installed, the first pushing (the first pushing is carried out for pushing a left beam into 31.463m and the first pushing is carried out for pushing a right beam into 28.19 m) is carried out, and the fourth support 4 is given way by the first pushing, so that the second beam section and the third beam section can be conveniently hoisted.
And (5) hoisting for the second time: h, I two beam segments were hoisted onto fourth cradle # 4 and 15 piers and H, I beam segments were welded to E, F, G beam segments as one. Hoisting for the third time: hoisting J, K, L beam segments to fourth support 4 and 16# piers, welding J, K, L beam segments with E, F, G, H, I five beam segments as a whole. And then, second pushing is carried out, wherein the second pushing (pushing by 52.315m on the left and positioning by 55.05m on the right) pushes the E, F, G, H, I, J, K, L eight beam sections and the guide beam to piers No. 13 and No. 14, the span beam is erected after the beam falls, and the guide beam is detached.
After the guide beam is removed, hoisting of the remaining beam sections is started, and M, N beam sections are hoisted to the second support 2 and the fourth support 4 close to the pier No. 15. The O, P, Q beam section on the right is hoisted to the 4 and 16# piers of the fourth bracket, and the O, P beam section on the left is hoisted to the 4 and 16# piers of the fourth bracket. Hoisting the C, D beam sections and C, D beam sections to the first support 1 and the second support 2. Hoisting the beam sections to the No. 1 and No. 12 piers through the beam sections of the right A, B beams and the beam sections of the left A, B beams. And after the full-bridge connection is finished, removing the temporary supports, namely the first support 1 to the fourth support 4, and coating finish paint for the last time to finish the installation of the steel-concrete composite beam 26.
The synchronous control hydraulic pump station 40 supplies oil to the three hydraulic pumps through the hydraulic pipeline 39 to provide power. The pushing process comprises the following steps: the box girder falls on the upper sliding mechanism 34, and the control system controls the jacking oil cylinder 33 to act to drive the box girder to jack. Then, the pushing oil cylinder 35 acts to drive the box girder to move horizontally, so that the box girder moves forwards. And the box girder moves forwards to the limit of the pushing oil cylinder 35, and then descends. The box girder falls back to the pad girder and is temporarily supported by the pad girder. Then the jacking oil cylinder 35 is reset. And repeating the steps until the box girder is in place, and completing the pushing of the over-line box girder.
The box girder pushing is carried out along a straight line, the walking track of the monitored steel box girder is measured at any time in the pushing process, and the corresponding transverse deviation rectifying numerical values are set for each group of pushing equipment 5 through the remote terminal 49 within a reasonable deviation rectifying range to carry out transverse deviation rectifying. The operation of the deviation rectifying process is as follows: advancing the jacking oil cylinder 35 → returning the jacking oil cylinder 33 and adjusting the transverse position through the deviation correcting oil cylinder 36 → jacking → advancing the jacking oil cylinder 35 to form a cycle.
According to the invention, the installation of the over-line beam is completed by three times of hoisting and two times of pushing, the erection length of the temporary support is reduced, the use amount of the temporary support and the pushing equipment 5 is reduced, the construction cost is reduced, and the construction difficulty is reduced.
Example 2:
a sliding walking type integral pushing installation process for a steel-concrete composite beam comprises the following steps:
s1, setting a support: a temporary support is erected, a construction platform is erected on the temporary support, and a pushing device 5 is installed on the construction platform;
s2, hoisting the steel-concrete composite beam 26: e, F, G three beam sections are used as first hoisting units, the first hoisting units are hoisted to the temporary support through a 260t truck crane, and E, F, G three beam sections are connected into an integrated structure;
s3, installing guide beams: hoisting the guide beam to the temporary support, and connecting the guide beam with the front end of the first hoisting unit;
as shown in fig. 18-21, S31, adjusting the height of the cushion block on the construction platform, and moving the guide beam to make the front end of the guide beam pass over the pushing device 5;
s32, arranging a jack on the pushing equipment 5, and jacking the front end of the guide beam (the end of the front end guide beam far away from the first hoisting unit) through the jack;
s33, arranging a support pile 51 on the pushing equipment 5, and supporting the guide beam by the support pile 51 after the jack is removed;
s34, pushing the first hoisting unit to enable the bottom of the guide beam to reach the position above the pushing device 5;
s4, first pushing: pushing the guide beam and the first hoisting unit in place through pushing equipment 5;
s5, assembling the steel-concrete composite beam 26 for the first time: using H, I two beam sections as second hoisting units, hoisting the second hoisting units to the temporary support, and connecting the second hoisting units with the first hoisting units to integrate E, F, G, H, I five beam sections;
s6, assembling the steel-concrete composite beam 26 for the second time: using J, K, L three beam sections as a third hoisting unit, hoisting the third hoisting unit to the temporary support, and connecting the third hoisting unit with the second hoisting unit to integrate E, F, G, H, I, J, K, L eight beam sections;
s7, second pushing: e, F, G, H, I, J, K, L eight beam sections and guide beams are pushed to the right position through pushing equipment 5;
s8, dismantling the guide beam: e, F, G, H, I, J, K, L eight beam section beams after the guide beam is removed;
as shown in fig. 22-25, S81, the jacking cylinder 33 of the jacking device 5 jacks the steel-concrete composite beam 26, so that the steel-concrete composite beam 26 is separated from the steel pad 52 at the pad beam;
s82, taking down a layer of steel cushion blocks 52, and after the steel cushion blocks 52 are taken down, integrally descending the steel-concrete composite beam 26 to enable the steel-concrete composite beam 26 to be supported on the steel cushion blocks 52 again;
s83, returning oil to the jacking oil cylinder 33 to enable the plunger of the jacking oil cylinder 33 to be separated from the beam bottom of the reinforced concrete composite beam 26, and after the steel cushion block 52 on one layer of the jacking oil cylinder 33 is taken down, the plunger of the jacking oil cylinder 33 is tightly jacked with the beam bottom again;
s84, repeating the steps S81, S82 and S83 until the steel-concrete composite beam 26 falls onto the support;
s9, hoisting the rest beam sections: hoisting the rest beam segments in place in sequence;
and S10, removing the bracket.
Wherein, the steps S31-S34 are the steps that the guide beam safely passes through the pier top. Because the front end of the steel guide beam is warped downwards due to the dead weight of the steel box beam and the guide beam, when the step (the first section) at the front end of the guide beam is close to the pushing equipment 5, the guide beam needs to be jacked up, the measure of passing through the pier by the guide beam is taken, the guide beam is positioned on the pushing equipment 5 after the guide beam stably falls, and then formal pushing is started. In step S32, the jack is provided on the pushing device 5, and the guide beam is lifted by the jack at the front end of the guide beam, so that the guide beam is prevented from being warped downward. And when the bottom of the guide beam reaches the position above the pushing equipment 5, normal pushing is started.
The steps S81 to S84 are beam dropping steps, the height of each steel pad block 52 is 100mm, and the steel-concrete composite beam 26 can be prevented from shaking greatly when the beam is dropped by taking off the steel pad blocks 52 one by one.
Further, in step S3, the guide beam is bolted to the first hoisting unit.
Further, after the step S2 is completed, the plane position of the beam segment is adjusted by setting a horizontal jack.
Furthermore, after the plane position of the beam section is adjusted, the vertical direction of the beam section is adjusted by arranging a vertical jack.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A steel-concrete composite beam is characterized in that: including hanging decking, case interaxial decking, case crossbeam and three narrow width steel case, it is three narrow width steel case parallel arrangement, two adjacent narrow width steel cases pass through the interbody crossbeam and connect, the decking sets up threely between the case the top of narrow width steel case, it has two, two to hang the decking and set up respectively at the top of two narrow width steel cases in the outside, two it sets up to hang the decking the both sides of decking between the case.
2. The steel-concrete composite beam according to claim 1, wherein: narrow width steel case is straight web structure, narrow width steel case includes roof, bottom plate, web and web rib, and the web is straight web structure, the web sets up between roof and the bottom plate, the web rib with the web is connected.
3. A sliding walking type integral pushing installation process for the steel-concrete composite beam as defined in claim 1 or 2, wherein a pushing system is used for installing the steel-concrete composite beam, and the process is characterized in that:
the pushing system comprises a first support, two second supports, a third support, a fourth support and a plurality of sets of pushing equipment; the first support, the third support and the fourth support are sequentially arranged, one second support is arranged between the first support and the third support, and the other second support is arranged between the third support and the fourth support; the sleeve pushing equipment is uniformly arranged on the two second supports, the third support and the fourth support;
the first support comprises six first stand columns and two first cross beams, the six first stand columns form a first cuboid framework, the length and the width of the first cuboid framework are respectively composed of three first stand columns and two first stand columns, a horizontal first transverse connecting rod and an inclined first inclined supporting rod are respectively arranged between every two adjacent first stand columns, and the two first cross beams are respectively arranged on the three first stand columns in the length direction of the first cuboid framework;
the second support comprises a second cross beam, six second vertical columns and three first longitudinal beams, the six second vertical columns form a second cuboid framework, the length and the width of the second cuboid framework are respectively composed of the three second vertical columns and the two second vertical columns, a horizontal second cross connecting rod and an inclined second inclined supporting rod are respectively arranged between every two adjacent second vertical columns, the first longitudinal beams are arranged on the two second vertical columns in the width direction of the second cuboid framework, and the second cross beam is arranged on the first longitudinal beams;
the third support comprises a third cross beam, nine third vertical columns and three second longitudinal beams, the nine third vertical columns form a third cuboid frame, the length and the width of the third cuboid frame are respectively composed of the three third vertical columns, a horizontal third cross connecting rod and an inclined third inclined strut are respectively arranged between every two adjacent third vertical columns, the second longitudinal beams are arranged on two point vertical columns in the width direction of the third cuboid frame, the second cross beam is arranged on the first longitudinal beam, and the third cross beam is arranged on the second longitudinal beam;
the fourth support comprises six fourth stand columns, a fourth cross beam and three third longitudinal beams, the six fourth stand columns form a fourth cuboid framework, the length and the width of the fourth cuboid framework are respectively composed of three fourth stand columns and two fourth stand columns, two adjacent fourth stand columns are connected through a horizontal fourth transverse connecting rod, and an inclined fourth inclined supporting rod is arranged between the two adjacent stand columns; the third longitudinal beams are arranged on two fourth vertical columns in the width direction of a fourth rectangular frame, and the fourth cross beams are arranged on the three third longitudinal beams; wherein, a plurality of sets of pushing equipment are respectively arranged on the third support, the fourth support and the two second supports;
the sliding walking type integral pushing installation process comprises the following steps:
s1, setting a support: building a temporary support, building a construction platform on the temporary support, and installing a pushing device on the construction platform;
s2, hoisting the steel-concrete composite beam: using E, F, G three beam sections as a first hoisting unit, hoisting the first hoisting unit to a temporary support, and connecting E, F, G three beam sections into an integrated structure;
s3, installing guide beams: hoisting the guide beam to the temporary support, and connecting the guide beam with the front end of the first hoisting unit;
s4, first pushing: pushing the guide beam and the first hoisting unit in place through pushing equipment;
s5, assembling the steel-concrete composite beam for the first time: using H, I two beam sections as second hoisting units, hoisting the second hoisting units to the temporary support, and connecting the second hoisting units with the first hoisting units to integrate E, F, G, H, I five beam sections;
s6, assembling the steel-concrete composite beam for the second time: using J, K, L three beam sections as a third hoisting unit, hoisting the third hoisting unit to the temporary support, and connecting the third hoisting unit with the second hoisting unit to integrate E, F, G, H, I, J, K, L eight beam sections;
s7, second pushing: pushing E, F, G, H, I, J, K, L eight beam sections and guide beams to a proper position by pushing equipment;
s8, dismantling the guide beam: e, F, G, H, I, J, K, L eight beam section beams after the guide beam is removed;
s9, hoisting the rest beam sections: hoisting the rest beam segments in place in sequence;
and S10, removing the bracket.
4. The incremental launching installation process as claimed in claim 3, wherein: the pushing equipment comprises a mechanical system, a pressure system and a control system,
the mechanical system comprises a jacking oil cylinder, an upper sliding mechanism, a pushing oil cylinder, a deviation-correcting oil cylinder, a guide mechanism and a lower supporting mechanism, wherein the guide mechanism is guide rails symmetrically arranged on two sides of the upper end of the lower supporting mechanism;
the pressure system is a synchronous control hydraulic pump station which is connected with the jacking oil cylinder, the pushing oil cylinder and the deviation rectifying oil cylinder through hydraulic pipelines;
the control system comprises a displacement sensor, electromagnetic valves, a control substation and a remote terminal, wherein the displacement sensor is provided with at least three sensors which are respectively used for monitoring the displacement of the jacking oil cylinder, the deviation rectifying oil cylinder and the jacking oil cylinder, and the electromagnetic valves are connected with the hydraulic pipeline; the displacement sensor is electrically connected with the control substation, the electromagnetic valve is electrically connected with the control substation, the hydraulic pump station is electrically connected with the control substation, and the control substation is in communication connection with the remote terminal;
the upper portion glide machanism includes sliding bottom plate, the supporting box and the top layer board of rectifying, sliding bottom plate with lower part supporting mechanism's upper end sliding connection, sliding bottom plate is last to be equipped with two limiting plates, two form the recess that is used for installing the supporting box of rectifying between the limiting plate, the supporting box of rectifying can follow the gliding setting of perpendicular to sliding bottom plate advancing direction and be in the recess, the top layer board with the supporting box of rectifying is connected.
5. The incremental launching installation process as claimed in claim 4, wherein: in step S3, the guide beam is bolted to the first hoisting unit.
6. The incremental launching installation process as claimed in claim 5, wherein: after step S2 is completed, the plane position of the beam segment is adjusted by setting a horizontal jack.
7. The incremental launching installation process as claimed in claim 6, wherein: and after the plane position of the beam section is adjusted, the vertical direction of the beam section is adjusted by arranging a vertical jack.
8. The incremental launching installation process as claimed in claim 7, wherein: step S3 further includes the steps of:
s31, the height of the cushion block on the construction platform is reduced, and the guide beam is moved to enable the front end of the guide beam to cross the pushing equipment;
s32, arranging a jack on the pushing equipment, and jacking the front end of the guide beam through the jack;
s33, arranging a support stack on the pushing equipment, and supporting the guide beam by the support stack after the jack is removed;
s34, pushing the first hoisting unit to enable the bottom of the guide beam to reach the upper part of the pushing equipment.
9. The incremental launching installation process of claim 8, wherein: step S8 further includes the steps of:
s81, jacking the steel-concrete composite beam by a jacking oil cylinder of the jacking equipment to ensure that the steel cushion block at the positions of the steel-concrete composite beam and the cushion beam is empty;
s82, taking down a layer of steel cushion blocks, and after the steel cushion blocks are taken down, the steel-concrete composite beam integrally descends to enable the steel-concrete composite beam to be supported on the steel cushion blocks again;
s83, returning oil to the jacking oil cylinder to enable the plunger of the jacking oil cylinder to be separated from the beam bottom of the reinforced concrete composite beam, and after a layer of steel cushion block on the jacking oil cylinder is taken down, the plunger of the jacking oil cylinder is tightly jacked with the beam bottom again;
and S84, repeating the steps S81, S82 and S83 until the steel-concrete composite beam falls down on the support.
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| CN202111138536.6A CN113981795A (en) | 2021-09-27 | 2021-09-27 | Steel-concrete composite beam and sliding walking type integral pushing installation process thereof |
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