Arch bridge and prefabricated assembled arch rib section thereof

Abstract

The utility model provides an arch bridge and its prefabricated assembled arch rib segment, including outer casting cylinder section and the main body section of box type structure, outer casting cylinder section and main body section match, main body section includes the socket end and the insert end that are arranged along its own extension direction opposite to each other, and the insert end and the socket end face each other along its own extension direction. The outer pouring barrel body section comprises a built-in section and an extension section which are oppositely arranged in the extending direction of the outer pouring barrel body section, the built-in section is fixedly connected to the socket end, and the extension section extends out of the socket end from the built-in section in the direction away from the insertion end so as to form a socket space for the insertion end of the next arch rib section to be inserted. The site construction time is greatly shortened by adopting a prefabricated assembly mode, the prefabricated parts are convenient to transport, the assembly speed is high, and the overall construction period is shortened; initial bearing capacity can be formed by adopting prestressed dry connection, and then the arch rib section joints are connected by lagging grouting, so that not only is the rapid progress of the construction period ensured, but also the'strong joint 'of the operation period is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge technical field especially arch bridge and its prefabricated assembly type arch rib section. BACKGROUND

[0002] Arch bridge is very popular in the city with developed water system because of its beautiful line and good bearing performance, arch bridge mainly bears axial pressure, and can be built by using materials with good compression resistance such as brick, stone and concrete.

[0003] The conventional concrete arch bridge usually adopts the full-frame support erection cast-in-situ construction, and this mode needs to erect a large number of supports under the bridge, which wastes a lot of manpower and material resources, has a long construction period, a poor working environment for workers, and the construction quality is difficult to guarantee, and the conventional concrete arch bridge is prone to cracking under tension in the construction process, which seriously affects the durability of the concrete structure.

[0004] Therefore, it is necessary to provide an arch bridge and a prefabricated assembly type arch rib section to solve or at least alleviate the above problems. SUMMARY

[0005] The main purpose of the utility model is to provide an arch bridge and a prefabricated assembly type arch rib section to solve the technical problem that the conventional concrete arch bridge in the prior art usually adopts the full-frame support erection cast-in-situ construction, has a long construction period, and is prone to cracking under tension in the construction process, which seriously affects the durability of the concrete structure.

[0006] To achieve the above purpose, the utility model provides a prefabricated assembly type arch rib section, which comprises an outer pouring cylinder section and a main body section in a box type structure, the outer shape of the outer pouring cylinder section matches that of the main body section, the main body section comprises a socket end and an insertion end oppositely arranged along the extension direction thereof, and the outer pouring cylinder section comprises an embedded section and an extension section oppositely arranged along the extension direction thereof, wherein the embedded section is fixedly connected to the socket end, and the extension section extends from the embedded section to the socket end in a direction away from the insertion end to form a socket space for the insertion of the insertion end of the next arch rib section.

[0007] Preferably, the main body section comprises a socket end partition plate, a middle partition plate and an insertion end partition plate which are arranged at intervals along the extension direction thereof, the embedded section is fixedly connected to the socket end partition plate, the socket end partition plate is provided with first through holes for the arch rib prestressed beam to pass through, the middle partition plate is provided with second through holes corresponding to the first through holes, and the insertion end partition plate is provided with third through holes corresponding to the second through holes.

[0008] Preferably, the socket end partition plate is concavely provided with a positioning key groove, and the insertion end is convexly provided with a positioning key tooth corresponding to the positioning key groove.

[0009] Preferably, the inner wall of the embedded segment is provided with a plurality of layers of first shear studs arranged at intervals along the extension direction of the outer-pouring cylinder segment, each layer of the first shear studs comprising a plurality of first shear studs arranged at intervals along the circumference of the embedded segment, each of the first shear studs being embedded in the concrete within the bell-end partition plate;

[0010] The inner wall of the extension segment is provided with a plurality of layers of second shear studs arranged at intervals along the extension direction of the outer-pouring cylinder segment, each layer of the second shear studs comprising a plurality of second shear studs arranged at intervals along the circumference of the extension segment.

[0011] Preferably, the steel pipe arranged at the insertion end comprises a first segment and a second segment arranged oppositely along the extension direction of the steel pipe, the first segment being connected to the inside of the bell-end partition plate, and the second segment being connected to the peripheral wall of the bell-end partition plate, wherein the peripheral wall of the steel pipe is provided with a plurality of layers of third shear studs arranged at intervals along the extension direction of the steel pipe, and the inner peripheral wall of the steel pipe is provided with a plurality of layers of fourth shear studs arranged at intervals along the extension direction of the steel pipe, wherein each layer of the third shear studs comprises a plurality of third shear studs arranged at intervals along the circumference of the steel pipe, and each layer of the fourth shear studs comprises a plurality of fourth shear studs arranged at intervals along the circumference of the steel pipe.

[0012] Preferably, the inside of the main segment is provided with a longitudinal main reinforcement along the extension direction of the main segment, one end of the longitudinal main reinforcement extending out of the bell-end partition plate and matching the extension segment, and the other end of the longitudinal main reinforcement extending out of the insertion-end partition plate and being located outside the steel pipe.

[0013] The application also provides an arch bridge comprising a plurality of the prefabricated and assembled arch rib segments as described above, the insertion end of the i+1th arch rib segment being inserted into the extension segment of the ith arch rib segment, and being connected to the bell end of the ith arch rib segment, so that a tubular concrete pouring space is formed between the extension segment and the insertion end, and a tubular grouting structure layer is formed by pouring ultra-high performance concrete into the tubular concrete pouring space, wherein i is a positive integer.

[0014] Preferably, the arch rib prestress beam penetrates through the corresponding first penetration hole, the second penetration hole and the third penetration hole of the j+1th arch rib segment and the corresponding first penetration hole of the jth arch rib segment, and one end of the arch rib prestress beam is anchored to the bell-end partition plate of the jth arch rib segment, and the other end of the arch rib prestress beam is anchored to the bell-end partition plate of the j+1th arch rib segment, wherein j is a positive integer.

[0015] Compared with the prior art, the application has the following beneficial effects:

[0016] The utility model provides a kind of arch bridge and its prefabricated assembly type arch rib section, including outer pouring cylinder section and the main body section of box type structure, the shape of the outer pouring cylinder section and the main body section is matched, the main body section includes relatively arranged socket end and insertion end along its own extension direction, the outer pouring cylinder section includes relatively arranged embedding section and extension section along its own extension direction, wherein, the embedding section is fixedly connected on the socket end, the extension section is extended to the socket end outside from the embedding section in the direction away from the insertion end, to form the socket space for the insertion end of next arch rib section insertion.

[0017] The application adopts prefabricated assembly mode to greatly reduce on-site construction time, and the prefabricated component is convenient to transport, and the assembly speed is fast, so that the overall construction period is shortened; the application can form initial bearing capacity by using prestressed dry connection, and then connect arch rib section joints by lag grouting, so that the rapid advancement during construction period is ensured, and the "strong node" during operation period is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained from the structures shown in the drawings without creative labor for those skilled in the art.

[0019] Figure 1 It is the overall structure schematic diagram in an embodiment of the utility model;

[0020] Figure 2 It is the cross section schematic diagram of socket end partition plate in an embodiment of the utility model;

[0021] Figure 3 It is the end surface structure schematic diagram of socket end partition plate in an embodiment of the utility model;

[0022] Figure 4 It is the cross section schematic diagram of insertion end partition plate in an embodiment of the utility model;

[0023] Figure 5 It is the end surface structure schematic diagram of insertion end partition plate in an embodiment of the utility model;

[0024] Figure 6 It is the cross section schematic diagram of middle partition plate in an embodiment of the utility model;

[0025] Figure 7 It is the grouting connection schematic diagram of adjacent two arch rib section in an embodiment of the utility model;

[0026] Figure 8The utility model discloses an embodiment of the utility model provides a structure diagram of arch bridge.

[0027] The utility model discloses the realization, function characteristics and advantages will be further explained with reference to the drawings.

[0028] Explanation of the attached drawings:

[0029] 10, arch bridge;20, prefabricated assembly type arch rib section;210, outer pouring cylinder section;211, embedded section;2111, first shear nail;212, extension section;2121, second shear nail;2122, socket space;220, main body section;221, socket end;2211, positioning key groove;222, insertion end;2221, positioning key tooth;223, socket end baffle;2231, first through hole;224, mid baffle;2241, second through hole;225, insertion end baffle;2251, third through hole;226, longitudinal main reinforcement;230, steel pipe;231, first section;232, second section;233, third shear nail;234, fourth shear nail;30, arch rib prestressed beam;40, tubular grouting structure layer. Specific implementation

[0030] It should be understood that the specific embodiments described herein are merely used to explain the utility model, and are not used to limit the utility model.

[0031] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0032] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as described in the drawings). If the specific posture changes, the directionality indications also change accordingly.

[0033] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implying the number of the technical features indicated. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0034] Please refer to the accompanying Figures 1 to 8 The present application provides an embodiment of a prefabricated assembled arch rib segment 20, which comprises an outer pouring cylinder segment 210 and a main body segment 220 in a box structure. The outer shape of the outer pouring cylinder segment 210 and the main body segment 220 is matched. The main body segment 220 comprises a socket end 221 and an insertion end 222 arranged oppositely along the extension direction thereof. The outer pouring cylinder segment 210 comprises an embedded segment 211 and an extension segment 212 arranged oppositely along the extension direction thereof. The embedded segment 211 is fixedly connected to the socket end 221. The extension segment 212 extends from the embedded segment 211 to the outside of the socket end 221 in a direction away from the insertion end 222, so as to form a socket space 2122 for the insertion of the insertion end 222 of the next arch rib segment.

[0035] Specifically, the present application can prefabricate each arch rib segment in the factory in advance. When the bridge construction is carried out, the assembled construction can be adopted. The insertion end 222 of the next arch rib segment is inserted into the socket space 2122 of the previous arch rib segment. The connection between the adjacent two arch rib segments is realized by grouting in the space between the insertion end 222 and the extension segment 212. Each main body segment 220 is in a box structure, which has high rigidity and stability. The outer pouring cylinder segment 210 has the embedded segment 211 and the extension segment 212 arranged oppositely along the extension direction thereof. The embedded segment 211 and the extension segment 212 can be set to be cylindrical or square cylindrical or other shapes according to the shape of the main body segment 220. The embedded segment 211 is fixedly connected to the socket end 221 of the main body segment 220, while the extension segment 212 extends outward to form a socket space 2122 for receiving the insertion of the insertion end 222 of the next arch rib segment and forming a grouting space, so as to realize the grouting connection between the adjacent two arch rib segments. Preferably, in the preferred example, the main body segment 220 is set to be cylindrical, the outer pouring cylinder segment 210 is set to be cylindrical, and the outer diameter of the main body segment 220 is equal to the outer diameter of the outer pouring cylinder segment 210.

[0036] The prefabricated assembly method greatly reduces the on-site construction time, the prefabricated components are convenient to transport and fast to assemble, which is beneficial to reduce the overall construction period and can realize support-free construction. Preferably, the arch rib segment is made of ultra-high strength concrete material (UHPC), which is a new type of building material that has rapidly popularized and applied in bridge engineering due to its excellent tensile and compressive properties, and has the advantages of high strength, strong durability, good impermeability, good impact resistance, strong plasticity, and green environmental protection.

[0037] As a preferred embodiment, the main body segment 220 comprises a socket end partition plate 223, a middle partition plate 224 and an insertion end partition plate 225 arranged at intervals along the extension direction thereof, wherein the embedded segment 211 is fixedly connected to the socket end partition plate 223, the socket end partition plate 223 is provided with first through holes 2231 for the arch rib prestressed beam 30 to pass through, the middle partition plate 224 is provided with second through holes 2241 corresponding to the first through holes 2231, and the insertion end partition plate 225 is provided with third through holes 2251 corresponding to the second through holes 2241.

[0038] Specifically, the arrangement of the socket end partition plate 223, the middle partition plate 224 and the insertion end partition plate 225 not only enhances the strength of the arch rib segment, but also provides a structural basis for the arrangement and tensioning of the arch rib prestressed beam 30 inside.

[0039] As a preferred embodiment, the socket end partition plate 223 is concavely provided with a positioning key groove 2211, and the insertion end 222 is convexly provided with a positioning key tooth 2221 corresponding to the positioning key groove 2211.

[0040] Specifically, when connecting two adjacent arch rib segments: the positioning key tooth 2221 on the insertion end partition plate 225 of the i+1th arch rib segment is inserted into the positioning key groove 2211 of the socket end partition plate 223 of the ith arch rib segment, and through the cooperation of the positioning key tooth 2221 and the positioning key groove 2211, the positioning accuracy of the connection between the arch rib segments can be improved, and the alignment of each segment can be ensured. The cooperation of the positioning key groove 2211 and the positioning key tooth 2221 simplifies the on-site installation process, improves the construction efficiency, and can shorten the construction period, wherein i is a positive integer.

[0041] As a preferred embodiment, the inner wall of the embedded segment 211 is provided with a plurality of layers of first shear studs arranged along the extension direction of the outer-pouring cylinder segment 210, each layer of the first shear studs comprising a plurality of first shear studs 2111 arranged along the circumference of the embedded segment 211, each of the first shear studs 2111 being embedded in the concrete within the socket end partition plate 223; the inner wall of the extension segment 212 is provided with a plurality of layers of second shear studs arranged along the extension direction of the outer-pouring cylinder segment 210, each layer of the second shear studs comprising a plurality of second shear studs 2121 arranged along the circumference of the extension segment 212.

[0042] Specifically, the arrangement of the first shear studs 2111 and the second shear studs 2121 enhances the shear resistance between the arch rib segments, reduces the structural damage caused by shear force, and the outer-pouring cylinder segment 210 is reliably connected through the second shear studs 2121 and the tubular grouting structure layer 40 described later, which can further enhance the strength of the connecting joint between the adjacent two arch rib segments.

[0043] As a preferred embodiment, a steel pipe 230 is further arranged at the insertion end 222, the steel pipe 230 comprising a first segment 231 and a second segment 232 oppositely arranged along the extension direction of the steel pipe 230, the first segment 231 being connected to the inside of the socket end partition plate 223, and the second segment 232 being connected to the outer peripheral wall of the socket end partition plate 223, wherein the outer peripheral wall of the steel pipe 230 is provided with a plurality of layers of third shear studs arranged along the extension direction of the steel pipe 230, and the inner peripheral wall of the steel pipe 230 is provided with a plurality of layers of fourth shear studs arranged along the extension direction of the steel pipe 230, wherein each layer of the third shear studs comprises a plurality of third shear studs 233 arranged along the circumference of the steel pipe 230, and each layer of the fourth shear studs comprises a plurality of fourth shear studs 234 arranged along the circumference of the steel pipe 230.

[0044] Specifically, the arrangement of the third shear studs 233 and the fourth shear studs 234 enhances the shear resistance between the arch rib segments, reduces the structural damage caused by shear force. And the steel pipe 230 is reliably connected through the fourth shear studs 234 and the tubular grouting structure layer 40 described later, which can further enhance the strength of the connecting joint between the adjacent two arch rib segments.

[0045] As a preferred embodiment, the inside of the main body segment 220 is provided with a longitudinal main reinforcement 226 along the extension direction thereof, one end of the longitudinal main reinforcement 226 extending out of the socket end partition plate 223 and matching with the extension segment 212, and the other end of the longitudinal main reinforcement 226 extending out of the insertion end partition plate 225 and being located outside the steel pipe 230.

[0046] Please refer to Figure 1The longitudinal main reinforcement 226 is spaced out in the tubular grouting space, which can effectively avoid the steel bar conflict when the segments are joined, and at the same time provide continuous longitudinal bearing capacity for the arch rib segments.

[0047] This application also provides an arch bridge 10, including a plurality of prefabricated assembled arch rib segments 20 as described above. The insertion end 222 of the (i+1)th arch rib segment is inserted into the extension segment 212 of the i-th arch rib segment and is connected to the socket end 221 of the i-th arch rib segment. A tubular concrete pouring space (not shown in the figure) is formed between the extension segment 212 and the insertion end 222. Ultra-high performance concrete is poured into the tubular concrete pouring space to form a tubular grouting structure layer 40, where i is a positive integer.

[0048] like Figure 7 As shown, the insertion end 222 of the (i+1)th arch rib segment is inserted into the extension segment 212 corresponding to the ith arch rib segment and is aligned with the socket end 221 of the ith arch rib segment, forming a tubular concrete pouring space between the insertion end 222 and the extension segment 212. Ultra-high performance concrete (UHPC) is poured into the tubular concrete pouring space, and after hardening, a tubular grouting structure layer 40 is formed, thereby achieving a firm connection between the arch rib segments. It is worth noting that the precision control and reliability during construction directly affect the durability and safety of the structure during operation. Many prefabricated structures cannot meet the manufacturing precision requirements, and the structural design has too low a tolerance, resulting in the inability to install on site and the scrapping of prefabricated components. In this embodiment, through this grouting connection scheme, the docking space between the insertion end 222 and the socket end 221 is large, the tolerance of the prefabricated structure is large, and the joint construction is convenient.

[0049] In a preferred embodiment, the arch rib prestressed tendon 30 passes through the first through hole 2231, the second through hole 2241, and the third through hole 2251 corresponding to the (j+1)th arch rib segment and the first through hole 2231 corresponding to the j-th arch rib segment. Then, one end of the arch rib prestressed tendon 30 is anchored to the socket end partition 223 of the j-th arch rib segment, and the other end is anchored to the socket end partition 223 of the (j+1)th arch rib segment, where j is a positive integer.

[0050] When the j+1th arch rib segment and the jth arch rib segment need to be connected, the arch rib prestressed beam 30 is first passed through the first through hole 2231 on the socket end partition plate 223 of the j+1th arch rib segment, sequentially passes through the second through hole 2241 and the third through hole 2251 of the segment, and then enters the corresponding first through hole 2231 of the jth arch rib segment, and then the two ends of the arch rib prestressed beam 30 are respectively anchored in the socket end partition plate 223 of the jth arch rib segment and the socket end partition plate 223 of the j+1th arch rib segment, so as to connect the two arch rib segments into a whole through the arch rib prestressed beam 30. This connection mode not only improves the rigidity and strength of the arch rib segment, but also enhances the stability of the entire arch bridge 10, the external prestressed beam improves the structural bearing capacity and disaster resistance, and the overall performance of the structure is better under the action of earthquake and other dynamic forces. The sealing property and durability of the box type structure are good, which can effectively prevent the arch rib prestressed beam 30 from being corroded and damaged, and the maintenance cost of the prestressed beam is relatively low in the later bridge use process.

[0051] It should be noted that due to the transportation and lifting conditions and equipment limitations, the bridge industrialized manufacturing is usually carried out in segments, and then connected on site. The connection between the segments is a potential weak link, especially in terms of construction progress and structural strength. The relatively reliable cast-in-place joint has a long waiting time and needs to set up temporary supports, and the durability and strength of the dry joint are difficult to guarantee. The present application can use prestressed dry connection to form initial bearing capacity, and then lag grouting to connect the arch rib segment joint, which not only ensures the rapid progress during construction period, but also ensures the "strong node" during operation period.

[0052] The above is only the preferred embodiment of the utility model, and does not limit the protection scope of the utility model, and any equivalent structure or equivalent process transformation according to the content of the utility model specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the utility model.

Claims

1. A prefabricated segmental arch rib segment, characterized in that, The outer pouring cylinder section and the main body section are matched in shape, the main body section includes a socket end and an insertion end oppositely arranged along the extending direction of the main body section, the outer pouring cylinder section includes an embedded section and an extension section oppositely arranged along the extending direction of the outer pouring cylinder section, the embedded section is fixedly connected to the socket end, and the extension section extends from the embedded section to the outside of the socket end in a direction away from the insertion end to form a socket space for the insertion of the insertion end of the next arch rib section.

2. The pre-fabricated segmental rib segment of claim 1, wherein, The main body section includes socket end partition plates, middle partition plates and insertion end partition plates which are arranged at intervals along the extending direction of the main body section, the embedded section is fixedly connected to the socket end partition plates, the socket end partition plates are provided with first through holes for the penetration of arch rib prestressed tendons, the middle partition plates are provided with second through holes corresponding to the first through holes, and the insertion end partition plates are provided with third through holes corresponding to the second through holes.

3. The pre-fabricated segmental arched rib of claim 2, wherein, The socket end partition plates are concavely provided with positioning key grooves, and the insertion end is convexly provided with positioning key teeth corresponding to the positioning key grooves.

4. The pre-fabricated segmental arched rib of claim 2, wherein, The inner wall of the embedded section is provided with multiple layers of first shear studs arranged at intervals along the extending direction of the outer pouring cylinder section, each layer of the first shear stud layer includes multiple first shear studs arranged at intervals along the circumferential direction of the embedded section, and each first shear stud is embedded in the concrete in the socket end partition plate. The inner wall of the extension section is provided with multiple layers of second shear studs arranged at intervals along the extending direction of the outer pouring cylinder section.

5. The pre-fabricated segmental arched rib segment of claim 4, wherein, The steel pipe arranged at the insertion end includes a first section and a second section oppositely arranged along the extending direction of the steel pipe, the first section is connected to the inside of the socket end partition plate, and the second section is connected to the outer circumferential wall of the socket end partition plate, wherein the outer circumferential wall of the steel pipe is provided with multiple layers of third shear stud layers arranged at intervals along the extending direction of the steel pipe, the inner circumferential wall of the steel pipe is provided with multiple layers of fourth shear stud layers arranged at intervals along the extending direction of the steel pipe, each layer of the third shear stud layer includes multiple third shear studs arranged at intervals along the circumferential direction of the steel pipe, and each layer of the fourth shear stud layer includes multiple fourth shear studs arranged at intervals along the circumferential direction of the steel pipe.

6. The pre-fabricated segmental arched rib segment of claim 5, wherein, The inside of the main body section is provided with longitudinal main reinforcement along the extending direction of the main body section, one end of the longitudinal main reinforcement protrudes from the socket end partition plate and matches the extension section, and the other end of the longitudinal main reinforcement protrudes from the insertion end partition plate and is located outside the steel pipe.

7. An arch bridge, characterized by The method comprises the steps of: pouring concrete into the tubular concrete pouring space to form a tubular grouting structure layer, and pouring concrete into the tubular grouting structure layer to form a tubular grouting structure layer.

8. The arch bridge of claim 7, wherein The arch rib prestressed beam penetrates through the first penetrating hole, the second penetrating hole and the third penetrating hole corresponding to the j+1th arch rib segment and the first penetrating hole corresponding to the jth arch rib segment, and then one end of the arch rib prestressed beam is anchored on the socket end partition plate of the jth arch rib segment and the other end is anchored on the socket end partition plate of the j+1th arch rib segment, wherein j is a positive integer.

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