CN212316557U - Prefabricated steel bent cap suitable for multi-strand road passes through - Google Patents
Prefabricated steel bent cap suitable for multi-strand road passes through Download PDFInfo
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- CN212316557U CN212316557U CN202022025904.3U CN202022025904U CN212316557U CN 212316557 U CN212316557 U CN 212316557U CN 202022025904 U CN202022025904 U CN 202022025904U CN 212316557 U CN212316557 U CN 212316557U
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Abstract
The utility model belongs to the technical field of the technique of track construction and specifically relates to a prefabricated steel bent cap suitable for stranded way passes through, include the prefabricated steel bent cap that comprises the prefabricated steel structural component of a plurality of square structures, accessible bolted connection carries out around, about and about the ascending extension of side between the prefabricated steel structural component to prefabricated steel structural component inboard is equipped with a plurality of reinforcement members. The utility model discloses construction process is advanced in reducible conventional top is particularly useful for the stranded way top and advances, can dwindle the pouring time of concrete bent cap smoothly, has avoided the concrete shaping period to influence but can't carry out the negative time that advances in top again to the railway operation, has shortened the operating time that conventional railway top advances the construction furthest.
Description
Technical Field
The utility model belongs to the technical field of track construction's technique and specifically relates to a prefabricated steel bent cap suitable for stranded way passes through.
Background
The conventional railway jacking construction method is characterized in that a temporary beam foundation is tied through a concrete bent cap, and a temporary beam is supported and constructed so as to support and carry a railway track. The conventional railway jacking construction needs to arrange a construction temporary beam above a jacking structure, and the load is transmitted at the two ends of the construction temporary beam in a form of arranging buttress capping beams. Specifically, before jacking construction, a temporary beam foundation (such as high-pressure jet grouting and the like) and a temporary pier (capping beam) are arranged below a railway track through a construction temporary beam, and the method of the temporary pier is different according to different construction processes. Conventional temporary buttresses are set by utilizing the time of a railway skylight to adopt a concrete cast-in-place mode, the defects of the conventional temporary buttresses in the construction mode are that the concrete pouring time is long, the railway influence time is further prolonged, and if the conventional temporary buttresses are related to multi-track jacking, the railway influence time can be greatly aggravated, so that the railway operation is influenced.
Along with the progress of science and technology, a novel capping beam buttress setting mode continuously emerges. For example, the precast capping beam made of reinforced concrete can be used for shortening the precast time of concrete, but the precast capping beam is large in size and high in weight, the influence of a hoisting device on railway operation is overlarge, the precast capping beam cannot be manually moved to an appointed capping beam foundation position, the precast capping beam can only be pushed by arranging small working grooves on two sides perpendicular to the railway track direction, the condition that the capping beam foundation is arranged is avoided (the method is only suitable for the construction without the capping beam foundation), and the stability of the precast capping beam is not facilitated. When a multi-track condition is met, the concrete pouring time is greatly increased.
Disclosure of Invention
The utility model aims at providing a prefabricated steel bent cap suitable for multiple track passes through according to above-mentioned prior art not enough, the prefabricated steel bent cap is assembled into with prefabricated steel structural component through bolted connection's mode to just form effective connection with the construction, thereby reach the load transmission effect of conventional interim bent cap, need not the cast in situ concrete buttress.
The utility model discloses the purpose is realized accomplishing by following technical scheme:
the utility model provides a prefabricated steel bent cap suitable for stranded way passes through which characterized in that: the prefabricated steel cover beam is formed by splicing a plurality of prefabricated steel structural members of square structures, the prefabricated steel structural members can be spliced, combined and lengthened through bolt connection, and a plurality of reinforcing members are arranged on the inner sides of the prefabricated steel structural members.
Four end connecting holes are symmetrically formed in the centers of the top plate and the bottom plate of the prefabricated steel structural member respectively, and the end connecting holes are uniformly and symmetrically arranged.
End reinforcing plates are symmetrically arranged on the inner sides of the top plate and the bottom plate of the prefabricated steel structural member and are located in the middle of the end connecting holes.
Prefabricated steel structural component left side board is equipped with both sides along its upper and lower side and to the connecting hole, prefabricated steel structural component floor is all installed to the inboard of prefabricated steel structural component left side board and right side board, two are located to a prefabricated steel structural component floor on the prefabricated steel structural component left side board side direction connecting hole middle part, two prefabricated steel structural component floors on the prefabricated steel structural component right side board set up for upper and lower direction symmetry.
A single said prefabricated steel structural member may be supported as a temporary buttress to a construction stringer.
The jacking construction method for the prefabricated steel bent cap suitable for the multi-strand road crossing is characterized by comprising the following steps of: the jacking construction method comprises the following steps:
the construction method comprises the steps that a construction temporary beam end plate and a prefabricated steel structural member serving as a temporary buttress are arranged at the position required by design, the construction temporary beam is placed on a railway track, two ends of the construction temporary beam are erected on the prefabricated steel structural member serving as a temporary support through the construction temporary beam end plate respectively, and then a working groove is excavated below a track, wherein the working groove is positioned below the construction temporary beam;
constructing a jet grouting pile at the bottom of the working groove, and assembling prefabricated steel cover beams by prefabricated steel structural members after construction is finished, namely splicing the prefabricated steel structural members to form the prefabricated steel cover beams, wherein the prefabricated steel cover beams can be arranged along the vertical direction of a station track, and the splicing number of the prefabricated steel structural members meets the requirement that the spliced prefabricated steel cover beams can pass through the station track along the length of the spliced prefabricated steel cover beams;
after the prefabricated steel bent caps on the two sides are arranged, connecting the construction temporary beams above each track with the prefabricated steel bent caps in a translation mode to form a whole, and detachably using the prefabricated steel bent caps as prefabricated steel structural members of the temporary buttresses; at the moment, after the construction temporary beam foundation is built, a strip foundation is formed below the multi-strand road;
and (5) jacking the frame box culvert along the design direction, recovering the prefabricated steel bent cap after the jacking is finished, and backfilling the working groove.
The utility model has the advantages that: 1) compared with the construction process of prefabricating the precast steel bent cap by cast-in-place concrete below the conventional railway, the precast steel bent cap has simple construction procedures, does not need to erect a mould, avoids the concrete curing time and finally shortens the influence time of the railway overpass construction operation; 2) the prefabricated steel cover beam consists of two prefabricated steel structural members, has high flexibility, is lighter than a prefabricated concrete structure, can be moved to a specified position without using large-scale hoisting equipment, and does not cause construction space conflict for reinforcing the beam foundation; 3) for the working condition of a multi-track, the prefabricated steel bent cap can be directly lengthened in a bolt connection mode to form a strip foundation, the rigidity can be complemented by welding rib plates, and the flexibility is strong; 4) in the current stage of railway construction, the conditions of multiple tracks are gradually changed, for example, track groups such as railway stations and the like, the prefabricated steel bent cap can be arranged through reasonable construction organization, and compared with the conventional concrete cast-in-place, the construction process is saved; 5) the prefabricated steel bent cap assembly only needs to longitudinally move the temporary beam, and does not need to immediately fill the bent cap working groove, emergency reinforcement work can be carried out by using the section in the jacking process, and meanwhile, the prefabricated steel bent cap can be recycled after the structure jacking construction is finished, so that the prefabricated steel bent cap can be repeatedly used, is green and environment-friendly, and has extremely high economic benefit; the prefabricated steel bent cap component can be used as a foundation of a crane for facilitating beam transition in construction, has high availability and has popularization significance.
Drawings
Fig. 1 is a schematic structural view of a prefabricated steel structural member of the present invention;
FIG. 2 is a front view of the prefabricated steel structural member of the present invention;
fig. 3 is a schematic structural view of the prefabricated steel bent cap of the present invention;
FIG. 4 is an assembly diagram of the prefabricated steel bent cap and the construction beam of the present invention;
fig. 5 is a schematic view of the working state (one) of the jacking construction method of the present invention;
fig. 6 is a schematic view of the working state (ii) of the jacking construction method of the present invention;
fig. 7 is a schematic view of the working state (iii) of the jacking construction method of the present invention;
fig. 8 is a schematic view of the working state (iv) of the jacking construction method according to the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:
as shown in fig. 1-8, the symbols 1-13 in the figures are respectively represented as: the construction temporary beam 1, the construction temporary beam end plate 2, the prefabricated steel structural component 3, the railway track 4, the jet grouting pile 5, the working groove 6, the jacking framework structure box culvert 7, the prefabricated steel component rib plate 8, the end reinforcing plate 9, the lateral connecting hole 10, the end connecting hole 11, the lateral connecting hole connecting bolt 12 and the end connecting hole connecting bolt 13.
Example (b): the prefabricated steel bent cap suitable for multi-strand road crossing in the embodiment is used for jacking crossing construction under the existing strand road, can be applied to multiple occasions in construction through structural design, and effectively guarantees construction quality while improving construction efficiency.
Specifically, as shown in fig. 1 to 8, the present embodiment mainly includes a prefabricated steel structural member 3, where the prefabricated steel structural member 3 is a square structure and is composed of a left side plate, a right side plate, a top plate and a bottom plate. As shown in fig. 1 and 2, four end connection holes 11 are symmetrically formed in the centers of the top plate and the bottom plate of the prefabricated steel structural member 3, the end connection holes 11 are placed in a square shape, end reinforcing plates 9 arranged in the front-back direction are symmetrically mounted on the inner sides of the top plate and the bottom plate of the prefabricated steel structural member 3, and the end reinforcing plates 9 are located in the middle of the four end connection holes 11. The left side plate of the prefabricated steel structural component 3 is provided with two lateral connecting holes 10 along the up-down direction thereof, prefabricated steel member rib plates 8 arranged in the front-back direction are installed on the inner sides of the left side plate and the right side plate of the prefabricated steel structural component 3, one prefabricated steel member rib plate 8 on the left side plate of the prefabricated steel structural component 3 is arranged in the middle of the two lateral connecting holes 10, and the two prefabricated steel member rib plates 8 on the right side plate of the prefabricated steel structural component 3 are symmetrically arranged in the up-down direction. The reinforcing members (the prefabricated steel member rib plates 8 and the end reinforcing plates 9) arranged on the inner side of the prefabricated steel structural member 3 can increase the strength and rigidity of the prefabricated steel structural member 3 and improve the bearing capacity of the prefabricated steel structural member.
As shown in fig. 1, 5 and 6, a single prefabricated steel structural member 3 may serve as a temporary buttress. When prefabricated steel structural component 3 is as interim buttress, can transversely place in the work hole to prefabricated steel structural component 3 left side board is up, and prefabricated steel structural component 3 left side board can be connected with the just roof beam end plate 2 of construction through the bolt, and then plays the effect of the just roof beam 1 of temporary support construction. In addition, because the temporary buttress (prefabricated steel structural member 3) bears a small load, the transverse placement can reduce the excavation depth for placing the temporary buttress, and the construction engineering and the construction time are reduced.
As shown in fig. 3 and 4, the left side plates of the two prefabricated steel structural members 3 can be connected together by two lateral connecting hole connecting bolts 12 to form the prefabricated steel capping beam. The roof of two prefabricated steel structural component 3 on the prefabricated steel bent cap all is connected with the beam end plate 2 of being under construction through end connection hole connecting bolt 13, and two just beam end plate 2 of being under construction connect respectively in the one end of two just beams 1 of being under construction, and the prefabricated steel bent cap supports and just beams 1 of being under construction. Wherein, two prefabricated steel structural component 3 on the prefabricated steel bent cap are vertical to be put, are the rigidity of considering just roof beam 1 transmission load of being under construction, and vertical placing is more great than transversely placing rigidity, more possesses the advantage to the load transmission.
When a plurality of tracks are required to be constructed simultaneously, the working grooves 6 can be excavated below each track, the working grooves 6 are communicated with each other, the prefabricated steel bent caps in the working grooves 6 can be spliced and lengthened by bolts along the direction (front and back direction) perpendicular to the tracks, the requirement for setting the foundation of the prefabricated steel bent caps is met, and the prefabricated steel bent caps 1 are effectively supported. The bolt connection mode, the connection position and the number of the connection holes can be adjusted according to the stress detection result of the construction temporary beam 1. The embodiment can be used for constructing a plurality of tracks simultaneously, and can effectively reduce the construction time.
In this embodiment, the prefabricated steel bent cap is assembled by the two prefabricated steel structural members 3 placed left and right, the number of the prefabricated steel structural members 3 in the left and right directions of the prefabricated steel bent cap can be properly adjusted according to actual conditions, and the number of the prefabricated steel structural members 3 in the up and down directions of the prefabricated steel bent cap can be properly increased for lengthening the prefabricated steel bent cap in the up and down directions and adaptively adjusting the positions of the reinforcing members and the bolt holes in the prefabricated steel structural members 3.
As shown in fig. 5, 6, 7, and 8, the present embodiment further includes the following jacking method:
1) as shown in fig. 5, the construction temporary beam end plate 2 and the prefabricated steel structural member 3 as the temporary buttress are completely arranged at the design required position, and the construction temporary beam 1 is placed on the railway track 4 for excavating the working groove 6 below the track. The ends of the construction beam 1 are supported on the prefabricated steel structural member 3 by the construction beam end plates 2.
2) As shown in fig. 6, the rotary spraying pile 5 is arranged by using the working groove 6 below the station track, and the prefabricated steel capping beam is assembled by the prefabricated steel structural component 3 after the construction is finished; for the multi-track condition, the prefabricated steel bent caps are connected by bolts along the direction (front and back direction) vertical to the tracks, so that the requirement for setting the foundation of the prefabricated steel bent caps is met;
3) as shown in fig. 7, after the prefabricated steel bent caps on both sides are arranged, the construction temporary beams 1 above each track are connected with the prefabricated steel bent caps in a translation manner (longitudinally moving along the track) to form a whole, and temporary buttresses (prefabricated steel structural members 3; after the foundation of the construction temporary beam 1 is built, forming a strip foundation below the multi-strand road, and preparing to jack the box culvert 7 with the frame structure, wherein the working groove 6 is not backfilled at the moment;
4) as shown in fig. 8, the frame box culvert 7 is jacked in the design direction, the prefabricated steel bent cap is recovered after jacking, and the working groove 6 is backfilled.
The jacking construction method can reduce the conventional jacking construction process, is particularly suitable for jacking a plurality of tracks, can smoothly shorten the pouring time of the concrete capping beam, avoids the negative time that the railway operation is influenced but jacking cannot be carried out during the concrete forming period, and shortens the operation time of the conventional railway jacking construction to the maximum extent.
In conclusion, compared with the construction process of prefabricating the capping beam by cast-in-place concrete below the conventional railway, the prefabricated steel capping beam is simple in construction process, does not need to erect a mould, avoids concrete curing time, and finally shortens the influence time of railway interchange construction operation; the prefabricated steel cover beam consists of two prefabricated steel structural members, has high flexibility, is lighter than a prefabricated concrete structure, can be moved to a specified position without using large-scale hoisting equipment, and does not cause construction space conflict for reinforcing the beam foundation; for the working condition of a multi-track, the prefabricated steel bent cap can be directly lengthened in a bolt connection mode to form a strip foundation, the rigidity can be complemented by welding rib plates, and the flexibility is strong; in the current stage of railway construction, the conditions of multiple tracks are gradually changed, for example, track groups such as railway stations and the like, the prefabricated steel bent cap can be arranged through reasonable construction organization, and compared with the conventional concrete cast-in-place, the construction process is saved; the prefabricated steel bent cap assembly only needs to longitudinally move the temporary beam and does not need to immediately fill the bent cap working groove, emergency reinforcement work can be carried out by utilizing the section in the jacking process, and meanwhile, the prefabricated steel bent cap can be recycled after the structure jacking construction is finished; the prefabricated steel bent cap component can be used as a foundation of a crane for facilitating beam transition in construction, has high availability and has popularization significance.
Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, the description thereof is not repeated herein.
Claims (5)
1. The utility model provides a prefabricated steel bent cap suitable for stranded way passes through which characterized in that: the prefabricated steel cover beam is formed by splicing a plurality of prefabricated steel structural members of square structures, the prefabricated steel structural members can be spliced, combined and lengthened through bolt connection, and a plurality of reinforcing members are arranged on the inner sides of the prefabricated steel structural members.
2. The prefabricated steel bent cap suitable for multi-strand road crossing as claimed in claim 1, wherein: four end connecting holes are symmetrically formed in the centers of the top plate and the bottom plate of the prefabricated steel structural member respectively, and the end connecting holes are uniformly and symmetrically arranged.
3. A prefabricated steel bent cap suitable for multi-strand road crossing according to claim 2, wherein: end reinforcing plates are symmetrically arranged on the inner sides of the top plate and the bottom plate of the prefabricated steel structural member and are located in the middle of the end connecting holes.
4. The prefabricated steel bent cap suitable for multi-strand road crossing as claimed in claim 1, wherein: prefabricated steel structural component left side board is equipped with both sides along its upper and lower side and to the connecting hole, prefabricated steel structural component floor is all installed to the inboard of prefabricated steel structural component left side board and right side board, two are located to a prefabricated steel structural component floor on the prefabricated steel structural component left side board side direction connecting hole middle part, two prefabricated steel structural component floors on the prefabricated steel structural component right side board set up for upper and lower direction symmetry.
5. The prefabricated steel bent cap suitable for multi-strand road crossing as claimed in claim 1, wherein: a single said prefabricated steel structural member may be supported as a temporary buttress to a construction stringer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022025904.3U CN212316557U (en) | 2020-09-16 | 2020-09-16 | Prefabricated steel bent cap suitable for multi-strand road passes through |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022025904.3U CN212316557U (en) | 2020-09-16 | 2020-09-16 | Prefabricated steel bent cap suitable for multi-strand road passes through |
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| Publication Number | Publication Date |
|---|---|
| CN212316557U true CN212316557U (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022025904.3U Active CN212316557U (en) | 2020-09-16 | 2020-09-16 | Prefabricated steel bent cap suitable for multi-strand road passes through |
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| CN (1) | CN212316557U (en) |
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