CN211200027U - Prefabricated UHPC board-like arched bridge of assembling - Google Patents
Prefabricated UHPC board-like arched bridge of assembling Download PDFInfo
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- CN211200027U CN211200027U CN201921979584.6U CN201921979584U CN211200027U CN 211200027 U CN211200027 U CN 211200027U CN 201921979584 U CN201921979584 U CN 201921979584U CN 211200027 U CN211200027 U CN 211200027U
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Abstract
The utility model relates to an ultra high performance concrete, bridge engineering and assembled structure field of being under construction fast, specifically speaking relate to a prefabricated UHPC board-like arched bridge of assembling, including being located both ends and prefabricated arch foot festival section and the built-in prestress wire who is used for hoist and mount, the inboard of arch foot festival section is provided with prefabricated standard arch rib festival section respectively, the other end of standard arch rib festival section is provided with prefabricated tenon fourth of the twelve earthly branches arch rib festival section respectively, is located to be provided with prefabricated midspan arch rib festival section between two tenon fourth of the twelve earthly branches arch rib festival sections, it reserves tenon fourth of the twelve earthly branches hole to stride to be provided with between arch rib festival section and the tenon fourth of the twelve earthly branches arch rib festival section and reserve tenon fourth of the twelve earthly branches hole. The prefabricated assembled UHPC plate type arch bridge solves the unfavorable conditions of low integral bearing capacity, large self weight and insufficient spanning capacity of a reinforced concrete arch bridge structure, effectively improves the spanning capacity and the integral bearing capacity of the arch bridge, greatly reduces the maintenance time, saves a large amount of manpower and material resources and improves the service life cycle of the bridge.
Description
Technical Field
The utility model relates to an ultra high performance concrete, bridge engineering and assembled structure field of being under construction fast, specifically speaking relate to a plate-type arched bridge of UHPC is assembled in prefabrication.
Background
The cast-in-place reinforced concrete arch bridge is mainly characterized by axial stress, has the advantages of excellent structural performance, large spanning capability and strong adaptability to geological terrains, is widely applied to urban, mountain and valley-spanning bridges, and is one of the common structural forms of modern bridges. Compared with the traditional masonry arch bridge, the structure constant-load effect of the reinforced concrete arch bridge can be reduced by 30-40% of the proportion of all the effects, so that the spanning capacity and the economic performance of the reinforced concrete arch bridge are greatly improved. However, in the construction process and the operation process, two main problems exist: firstly, the pouring of the reinforced concrete arch rib is complicated, the time consumption of the installation and disassembly site of the template is long, the concrete pouring is influenced by the site environment, and the quality cannot be controlled; secondly, the self weight of the main arch is large, the main arch is limited by the performance of common concrete materials, and the spanning capability is obviously insufficient.
Based on the problems, a design concept of prefabrication and assembly is introduced, and meanwhile, the excellent stress performance of ultra-high performance concrete (UHPC) is combined, so that a novel prefabricated and assembled UHPC plate type arch bridge is provided.
Disclosure of Invention
An object of the utility model is to provide a board-like arched bridge of UHPC is assembled in prefabrication, and this board-like arched bridge of UHPC is assembled in prefabrication effectively improves arched bridge leap-over ability and whole atress performance, has improved the life cycle of bridge simultaneously.
The technical scheme of the utility model lies in: a prefabricated assembled UHPC plate type arch bridge comprises prefabricated arch foot sections and built-in prestressed steel strands, wherein the prefabricated arch foot sections are located at two ends of the arch foot sections, the built-in prestressed steel strands are used for hoisting, prefabricated standard arch rib sections are respectively arranged on the inner sides of the arch foot sections, prefabricated mortise and tenon joint arch rib sections are respectively arranged at the other ends of the standard arch rib sections, a prefabricated mid-span arch rib section is arranged between the two mortise and tenon joint arch rib sections, a reserved mortise and tenon joint hole is formed between the mid-span arch rib section and the mortise and tenon joint arch rib sections, and a prefabricated T-shaped UHPC wedge block is riveted in the reserved mortise and tenon joint hole.
Furthermore, prestressed steel strand ducts are respectively arranged in the standard arch rib segment, the mortise-tenon arch rib segment and the mid-span arch rib segment, one end of each prestressed steel strand is anchored on one arch foot segment, and the other end of each prestressed steel strand sequentially penetrates through the prestressed steel strand ducts of the standard arch rib segment, the mortise-tenon arch rib segment and the mid-span arch rib segment and is anchored on the other arch foot segment.
Furthermore, an anchoring end plate of a prestressed steel strand is reserved on the arch springing segment.
Furthermore, the prestressed steel strand does not need to be tensioned, and a leading-out part led out from the lower part of the reserved mortise and tenon hole is arranged after the T-shaped UHPC wedge block is wedged into the reserved mortise and tenon hole.
Furthermore, epoxy resin glue is coated in a seam formed between the T-shaped UHPC wedge block and the reserved mortise and tenon hole.
Furthermore, epoxy resin glue is coated or grouting agent is pumped on the seams between the arch foot sections and the standard arch rib sections, between the standard arch rib sections and the tenon-and-mortise arch rib sections and between the tenon-and-mortise arch rib sections and the midspan arch rib sections respectively.
Furthermore, the arch foot segment, the standard arch rib segment, the mortise-tenon joint arch rib segment and the midspan arch rib segment are all prefabricated by UHPC materials.
Compared with the prior art, the utility model has the advantages of it is following:
1. the prefabricated assembled UHPC plate type arch bridge mainly comprises a prefabricated UHPC arch rib segment, a prestressed steel strand, a T-shaped UHPC wedge block and the like, and fundamentally solves the unfavorable conditions of low integral bearing capacity, great self weight and insufficient spanning capacity of a reinforced concrete arch bridge structure from the stages of design, construction and maintenance; the arch rib segment has the advantages of simple structure, clear stress performance, high universality and convenient construction;
2. the main arch ribs are prefabricated by UHPC materials, due to the ultrahigh strength of the UHPC materials, the cross section area of the bridge deck is reduced, the self weight of the structure can be greatly reduced, the self weight is reduced by 50-70% compared with that of a traditional reinforced concrete arch bridge, and the anti-seismic performance of the main arch is improved;
3. the arch rib segments are all formed by prefabricating and assembling, so that the mass production and the quality control are convenient to ensure, and the production cost can be further reduced;
4. the built-in prestressed steel strands are used for serially connecting all arch rib segments, and are convenient to transport and erect on site, the workload of transportation and site hoisting is greatly reduced, and the site construction time can be greatly shortened;
5. because the prefabricated assembled arch bridge adopts the UHPC material, the excellent stress performance and durability of the UHPC material are utilized, the spanning capability and the whole stress performance of the arch bridge are effectively improved, the maintenance time is greatly reduced, and a large amount of manpower and material resources are saved, thereby achieving the purpose of reducing the maintenance cost; meanwhile, the service life of the bridge is prolonged, and the service life and the traffic capacity of the bridge are increased.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a top view of the present invention;
fig. 3 is a perspective view of the present invention;
FIG. 4 is a schematic view of a tenon-and-mortise arch rib segment of the present invention;
fig. 5 is a schematic view of a mid-span arch rib segment of the present invention;
FIG. 6 is an overall schematic view of the bridging stage of the present invention;
in the figure: 1-a rib segment; 2-standard rib segments; 3-mortise and tenon joint arch rib segments; 31-prestressed steel strand pore canals; 4-mid-span arch rib segments; 5-T shaped UHPC wedges; 51-reserving mortise and tenon holes; 6-prestressed steel strands; 61-a lead-out portion; 7-hoisting device.
Detailed Description
In order to make the aforementioned features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.
Refer to fig. 1 to 6
The invention relates to a novel prefabricated assembled UHPC plate type arch bridge and a construction method thereof, which mainly aims at the common problems of heavy self weight, low crossing capability, long time consumption of field construction and the like of a common reinforced concrete arch bridge, has wider applicable bridge type range and can be used for municipal bridges, highway bridges and emergency and disaster relief engineering.
The prefabricated assembled UHPC plate type arch bridge comprises prefabricated arch foot sections 1 and built-in prestressed steel strands 6, wherein the prefabricated arch foot sections 1 are located at two ends of the arch foot sections, the built-in prestressed steel strands 6 are used for hoisting, prefabricated standard arch rib sections 2 are respectively arranged on the inner sides of the arch foot sections, prefabricated mortise and tenon joint arch rib sections 3 are respectively arranged at the other ends of the standard arch rib sections, a prefabricated mid-span arch rib section 4 is arranged between the two mortise and tenon joint arch rib sections, a reserved mortise and tenon joint hole 51 is formed between the mid-span arch rib section and the mortise and tenon joint arch rib sections, and a prefabricated T-shaped UHPC wedge block 5 is riveted in the reserved mortise and tenon joint hole.
In this embodiment, the arch foot segment, the standard arch rib segment, the mortise-tenon arch rib segment and the mid-span arch rib segment contain steel fibers, and are respectively prefabricated by UHPC.
The UHPC is the abbreviation of ultra-high performance concrete, and is a general name of a cement-based composite material with the compressive strength of more than 150MPa, ultra-high toughness and ultra-long durability. The main characteristics are as follows: the grading of the composition material particles reaches the optimal cement-based composite material; the water-gel ratio is less than 0.25, and the high proportion of the superfine short steel fiber reinforced material is contained; the compressive strength is not lower than 150 MPa; the material has toughness in a tensile state, and the tensile strength is still kept to be not less than 7MPa after cracking; the interior of the concrete has a non-connected through hole structure, and the concrete has high air and liquid immersion resistance, and compared with traditional concrete and High Performance Concrete (HPC), the durability of the concrete is greatly improved.
The cross section size of each arch rib section is far smaller than that of a common reinforced concrete slab arch, the strength is higher, the durability is better, and meanwhile, due to the fact that steel fibers are contained in the UHPC slab, the UHPC slab has better deformation performance and plays a role in energy consumption under the action of an earthquake.
In this embodiment, the standard arch rib segment, the mortise-tenon arch rib segment and the mid-span arch rib segment are respectively provided with a prestressed steel strand hole 31, one end of each prestressed steel strand is anchored on one arch foot segment, and the other end of each prestressed steel strand sequentially passes through the prestressed steel strand holes of the standard arch rib segment, the mortise-tenon arch rib segment and the mid-span arch rib segment and is anchored on the other arch foot segment. Therefore, the built-in prestressed steel strands play a role in connecting prefabricated UHPC arch rib segments in series and transporting and hoisting.
In this embodiment, for better anchoring with the prestressed steel strand, an anchoring end plate of the prestressed steel strand is reserved on the arch springing segment.
In this embodiment, the prestressed steel strand is only used as the serial arch rib segment and the hoisting function without tensioning, and the prestressed steel strand is led out from the reserved hole channel after the main arch is erected, that is, the T-shaped UHPC wedge block is wedged into the reserved mortise and tenon hole and then is provided with the lead-out portion 61 led out from the lower portion of the reserved mortise and tenon hole for transportation and hoisting.
In this embodiment, in order to complete the connection better, an epoxy resin adhesive is applied to the inside of the joint formed between the T-shaped UHPC wedge and the reserved mortise and tenon.
In this embodiment, in order to complete the connection better, epoxy resin glue or pumping grouting agent is respectively coated on the joints between the arch foot segments and the standard arch rib segments, between the standard arch rib segments and the mortise-tenon arch rib segments, and between the mortise-tenon arch rib segments and the mid-span arch rib segments.
The construction method of the prefabricated assembled UHPC plate-type arch bridge comprises the following steps:
(1) fixing a steel template on a pedestal according to the requirement of span, positioning a reserved steel strand hole and a reserved mortise-tenon male die according to a designed arch axis, prefabricating an arch foot segment 1, a standard arch rib segment 2, a mortise-tenon arch rib segment 3 and a midspan arch rib segment 4 in segments after the construction quality of the template is checked, reserving a prestressed steel strand hole 31 on each arch rib segment, reserving an anchoring end plate on each arch foot segment, and reserving and matching the end parts of the mortise-tenon arch rib segment 3 and the midspan arch rib segment to form a concave part of the reserved mortise-tenon hole. Before UHPC pouring, a trial assembly is carried out to determine that the working performance meets the requirements, integral pouring is adopted during pouring, and relevant measures are prepared to ensure the pouring quality.
(2) And maintaining each prefabricated segment by adopting a conventional maintenance method or a method of steam maintenance at 90 ℃ for 48 hours, removing the formwork after the maintenance of each prefabricated segment is finished, and inspecting the pouring quality of the prefabricated segments when the formwork is removed.
(3) After the form removal is finished, anchoring a prestressed steel strand 6 on one arch foot segment (1 #), sequentially connecting a standard arch rib segment 2, a tenon-and-mortise arch rib segment 3, a midspan arch rib segment 4, a tenon-and-mortise arch rib segment 3 and a standard arch rib segment 2 in series on the prestressed steel strand, and anchoring the other end of the prestressed steel strand on the other arch foot segment (2 #), wherein the series connection sequence is as follows: 1# → 2 → 3 → 4 → 3 → 2 → 2 #.
(4) After the sections are connected in series, the prestressed steel strands are led out from the positions of the reserved mortise and tenon holes 51 respectively for transportation and hoisting.
(5) And after the sections reach the designed strength, carrying out on-site hoisting, placing the prefabricated assembled UHPC plate type arch bridge on the abutment, and hoisting the led-out prestressed steel strand in place of each arch rib section through a hoisting device 7.
(6) After the hoisting is finished, the prestressed steel strand is led out from the lower part of the reserved mortise and tenon hole, and then is riveted into the T-shaped UHPC wedge block, so that a full-bridge structure is realized.
In this embodiment, in the step (1), when the mortise-tenon arch rib segments and the mid-span arch rib segments are prefabricated, the pouring at the position of the reserved mortise-tenon hole should be performed, so as to ensure accurate positioning of the steel male mold and the pouring quality of the UHPC at the position.
In this embodiment, in the step (4), epoxy resin glue or pumping grouting agent is respectively coated on the seams between the arch foot segments and the standard arch rib segments, between the standard arch rib segments and the tenon-and-mortise arch rib segments, and between the tenon-and-mortise arch rib segments and the mid-span arch rib segments; in the step (6), the T-shaped UHPC wedge block is prefabricated in a factory, the structure is determined according to the size of the reserved mortise and tenon hole, and epoxy resin glue is coated on the joint when the T-shaped UHPC wedge block is riveted into the reserved mortise and tenon hole.
The prefabricated assembled arch bridge structure has the advantages of light dead weight, low cost, simple and convenient erection and the like, so that the prefabricated assembled arch bridge structure can be quickly and widely applied to middle and small span bridge engineering, and the basic principle is as follows: after the UHPC material is adopted, due to the ultrahigh strength of the UHPC material, the cross section area of the bridge deck is reduced, the self weight of the structure can be greatly reduced, and the anti-seismic performance of the main arch is improved; the main arch is formed by prefabricating and assembling, the workload of transportation and on-site hoisting is greatly reduced, and the rapid construction is facilitated; due to the advantages of the UHPC material in the aspect of durability, the novel prefabricated assembly maintenance cost is reduced.
In addition, the main difference of this prefabricated concatenation UHPC arched bridge and traditional prefabricated concatenation arched bridge lies in: because the prestressed steel strand is arranged in the prefabricated arch rib and used for connecting all arch rib segments in series, the prestressed steel strand can be used for on-site hoisting, and the on-site construction operation is greatly reduced. Therefore, the novel prefabricated spliced UHPC arch bridge has the advantages of high bearing capacity, simplicity and convenience in construction, short construction period, high operability, easiness in popularization and application in actual engineering and wide application range. Meanwhile, the method has obvious potential advantages in the aspects of durability and maintenance, and has important economic and social benefits.
The above is only the preferred embodiment of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.
Claims (7)
1. The prefabricated assembled UHPC plate type arch bridge is characterized by comprising prefabricated arch foot sections and built-in prestressed steel strands, wherein the prefabricated arch foot sections are arranged at two ends of the arch foot sections, the built-in prestressed steel strands are used for hoisting, prefabricated standard arch rib sections are respectively arranged on the inner sides of the arch foot sections, prefabricated mortise and tenon joint arch rib sections are respectively arranged at the other ends of the standard arch rib sections, a prefabricated mid-span arch rib section is arranged between the two mortise and tenon joint arch rib sections, a reserved mortise and tenon joint hole is formed between the mid-span arch rib section and the mortise and tenon joint arch rib sections, and a prefabricated T-shaped UHPC wedge block is riveted in the reserved mortise and tenon joint hole.
2. The prefabricated assembled UHPC plate arch bridge of claim 1, wherein the standard arch rib segment, the mortise-tenon arch rib segment and the mid-span arch rib segment are respectively provided with a prestressed steel strand hole, one end of each prestressed steel strand is anchored on one arch foot segment, and the other end of each prestressed steel strand sequentially passes through the prestressed steel strand holes of the standard arch rib segment, the mortise-tenon arch rib segment and the mid-span arch rib segment and is anchored on the other arch foot segment.
3. The prefabricated assembled UHPC plate arch bridge of claim 2, wherein the arch springing segments are reserved with anchoring end plates of prestressed steel strands.
4. The prefabricated assembled UHPC plate arch bridge of claim 1, 2 or 3, wherein the prestressed steel strand is free from tension and is provided with a leading-out part led out from the lower part of the reserved mortise and tenon hole after the T-shaped UHPC wedge block is wedged into the reserved mortise and tenon hole.
5. A prefabricated assembled UHPC plate arch bridge according to claim 1, 2 or 3, wherein the joint formed between the T-shaped UHPC wedge and the pre-made mortise and tenon is internally coated with epoxy glue.
6. The prefabricated assembled UHPC plate arch bridge of claim 1, 2 or 3, wherein the joints between the arch foot segments and the standard arch rib segments, between the standard arch rib segments and the tenon-and-mortise arch rib segments and between the tenon-and-mortise arch rib segments and the mid-span arch rib segments are respectively coated with epoxy resin glue or pumped with grouting agent.
7. The prefabricated assembled UHPC plate arch bridge of claim 1, wherein the arch foot segments, the standard arch rib segments, the mortise and tenon joint arch rib segments and the mid-span arch rib segments are all prefabricated by UHPC materials.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700071A (en) * | 2019-11-16 | 2020-01-17 | 福州大学 | Prefabricated assembled UHPC plate type arch bridge and construction method thereof |
| CN112411360A (en) * | 2020-12-08 | 2021-02-26 | 中铁二院工程集团有限责任公司 | Tied arch bridge with netted suspender |
| CN112627004A (en) * | 2020-11-06 | 2021-04-09 | 上海建工电子商务有限公司 | Prefabricated body, plain concrete arch bridge structure and construction method thereof |
| CN112761051A (en) * | 2021-01-05 | 2021-05-07 | 广西路桥工程集团有限公司 | Prefabricated ultrahigh-performance concrete arch bridge and construction method thereof |
-
2019
- 2019-11-16 CN CN201921979584.6U patent/CN211200027U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700071A (en) * | 2019-11-16 | 2020-01-17 | 福州大学 | Prefabricated assembled UHPC plate type arch bridge and construction method thereof |
| CN110700071B (en) * | 2019-11-16 | 2024-06-04 | 福州大学 | Prefabricated assembled UHPC plate type arch bridge and construction method thereof |
| CN112627004A (en) * | 2020-11-06 | 2021-04-09 | 上海建工电子商务有限公司 | Prefabricated body, plain concrete arch bridge structure and construction method thereof |
| CN112411360A (en) * | 2020-12-08 | 2021-02-26 | 中铁二院工程集团有限责任公司 | Tied arch bridge with netted suspender |
| CN112761051A (en) * | 2021-01-05 | 2021-05-07 | 广西路桥工程集团有限公司 | Prefabricated ultrahigh-performance concrete arch bridge and construction method thereof |
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