A bridge-construction combined elevated station structure and construction method

Abstract

The present invention discloses an elevated station structure combined with bridge and construction, wherein a common pier is provided at the interface between the station end and the interval bridge, and common piers are provided at both ends of the station, and a sliding support structure is provided on the top of the common pier for connecting the station prestressed cap beam and the interval bridge; the sliding support of the sliding support structure is used to release the longitudinal constraint along the station and limit the lateral displacement constraint along the station; a track platform and a building platform are provided on the prestressed cap beam, a first reinforced concrete beam is provided on the track platform, and the first reinforced concrete beam is used to install the track, and a second reinforced concrete beam is provided on the building platform, and the second reinforced concrete beam is used to support the platform building. The present invention also discloses a construction method that is compatible with the station structure. The present invention discloses an elevated station structure system combined with "bridge and construction", wherein the station structure system does not have a temperature expansion joint, and solves the temperature stress caused by concrete shrinkage and creep during the construction phase due to the excessive length of the station.

Description

Technical Field

[0001] The present invention relates to the field of urban rail transit elevated station structural systems, and in particular to a bridge-construction combined elevated station structure and a construction method. Background Art

[0002] The construction and operation of urban rail transit can promote the development of related industries such as industry, transportation, and real estate, stimulate employment, promote the appreciation of land along the route, and expand urban development space. It has obvious external economies, that is, the total social economic benefits generated by the project are far greater than the book profits it generates itself.

[0003] When urban rail transit becomes a networked operation, it serves as a comprehensive platform that integrates various other networks (such as transportation, service, and trade). The rail transit network's powerful aggregation and release effects enable rapid circulation of passenger, logistics, capital, information, and other resources and services within the network across urban areas and even between cities. This has transformed social consumption, lifestyle, and production patterns, profoundly impacting urban economic operations. Therefore, the urban rail transit network possesses the attributes of a scale economy, with its radiating influence covering most of the network's internal and surrounding areas.

[0004] In my country's rail transit construction, suburban lines often utilize elevated stations. Elevated station structures serve the functional needs of the station. Although the platform and concourse structures are subject to complex loads, their structural forms can be categorized as either "bridge-to-structure combined" or "bridge-to-structure separated," depending on the relationship between the concourse and platform structures and the track structure. Specifically, the structural form of the elevated station, which determines whether the track beam structure bearing vehicle loads is separated from the other main structures bearing non-vehicle loads, can be separated.

[0005] The length of a "bridge-construction combination" elevated ground station can reach approximately 120 meters, exceeding the limit for expansion joints required by regulations. The station structure is subject to significant internal forces caused by temperature stresses, both during the construction phase and in later use. However, structural expansion joints, which directly bear the repeated loads of vehicles, are easily damaged and difficult to repair, and defects of varying degrees often occur. Furthermore, installing expansion joints requires dividing the entire station structure into multiple individual structures, increasing project investment. Therefore, a new type of elevated station structure is currently needed to overcome the problems caused by expansion joints. Summary of the Invention

[0006] In view of the above problems, the object of the present invention is to provide a station structure and construction method that does not require expansion joints and can reduce the adverse effects of temperature stress on the structure.

[0007] The object of the present invention is achieved through the following technical solutions:

[0008] An elevated station structure combined with a bridge and a bridge is provided with a common pier at the interface between the station end and the interval bridge. Common piers are provided at both ends of the station. A sliding support structure is provided on top of the common pier. One side of the sliding support structure is connected to the station prestressed cap beam, and the other side of the sliding support structure is connected to the interval bridge.

[0009] Each common pier is provided with a sliding support structure, and each sliding support structure is provided with one, two or at least three sliding supports, which are used to release the longitudinal constraints along the station and limit the lateral displacement constraints along the station;

[0010] A track platform and a building platform are arranged on the prestressed cap beam. A first reinforced concrete beam is arranged on the track platform for installing the track. A second reinforced concrete beam is arranged on the building platform for supporting the platform building.

[0011] As a preferred embodiment, a single supporting pier is provided between the common piers on both sides of the station, and a cross beam is provided on the single supporting pier, and the cross beam is used to support the first reinforced concrete beam and the second reinforced concrete beam.

[0012] As a preferred embodiment, each sliding support structure is provided with two sliding supports, and the two sliding supports are used to support the station prestressed cap beam and the section bridge respectively.

[0013] As a preferred method, a track platform is set in the middle of the prestressed cap beam, and building platforms are set on both sides of the prestressed cap beam, and the entire prestressed cap beam has a bilaterally symmetrical structure.

[0014] As a preferred embodiment, two second reinforced concrete beams are respectively arranged on the building platforms on both sides of the prestressed cap beam, and four first reinforced concrete beams are arranged on the track platform in the middle of the prestressed cap beam.

[0015] As a preferred embodiment, the length of the prestressed cap beam on the common column is at least 1 / 3 of the thickness of the common column.

[0016] As a preferred embodiment, the length of the interval bridge on the common pier is at least 1 / 3 of the thickness of the common pier.

[0017] As a preferred embodiment, a plurality of first reinforced concrete beams are provided in the longitudinal direction of the station, and the first reinforced concrete beams in the same longitudinal direction constitute a longitudinal structure 1, and a post-cast strip is provided on the longitudinal structure 1.

[0018] As a preferred embodiment, a plurality of second reinforced concrete beams are provided in the longitudinal direction of the station, and the second reinforced concrete beams in the same longitudinal direction constitute the second longitudinal structure, and a post-cast strip is provided on the second longitudinal structure.

[0019] A method for constructing an elevated station structure combining bridge and construction, comprising:

[0020] a. Construct the main foundation and single-support pier of the station, pour the crossbeam on the single-support pier and the second reinforced concrete beam on the crossbeam, and reserve a post-cast strip;

[0021] b. Construct the common pier where the station meets the section bridge, construct the support pedestal at the top of the common pier, and install the sliding bearing. The sliding bearing releases the longitudinal displacement constraint along the station and limits the lateral displacement along the station.

[0022] c. Cast the prestressed cap beam and the first reinforced concrete beam of the platform layer at the end of the station and reserve the corresponding post-casting strips;

[0023] d. Erect the prefabricated bridge at the end of the interval bridge on the top of the common pier and install the sliding bearings at the corresponding positions;

[0024] e. 50-70 days (for example, 60 days) after the main structure of the station is completed, use micro-expansive concrete with a strength one level higher than the concrete of the station structure to complete the station post-cast joint.

[0025] The present invention provides a bridge-construction elevated station structure system for urban rail transit. This station structure eliminates thermal expansion joints, addressing thermal stresses caused by concrete shrinkage and creep during construction due to excessive station length. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a longitudinal section of the station structure according to the present invention;

[0028] Figure 2 This is a cross-sectional view of the prestressed cap beam structure at the end of the station structure according to the present invention;

[0029] Figure 3 This is a structural diagram of the connection between the end of the station structure and the interface between the interval bridges of the present invention;

[0030] Figure 4 This is a schematic structural diagram of an embodiment of a sliding support of the present invention;

[0031] In the figure, 1-post-cast strip, 2-common pier, 3-prestressed cap beam, 4-interval bridge, 5-sliding bearing, 5.1-upper matching seat, 5.2-ball, 5.3-upper support member, 5.4-guide plate, 5.5-lower support member, 5.6-lower matching seat, 6-first reinforced concrete beam. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0035] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, if a first feature exists above or below a second feature, it may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. If a first feature exists below, below, and below the second feature, it includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] As described in the background technology section, expansion joints are generally set in the field of elevated station structures. At that time, the expansion joints are directly subjected to the repeated loads of vehicles. The expansion joints are easily damaged and difficult to repair, and defects of varying degrees often occur.

[0038] like Figure 1 As shown, a bridge-construction combined elevated station structure has a common pier 2 set at the interface between the station end and the interval bridge 4. The common pier 2 is a common pier used to support the prestressed cap beam 3 and the interval bridge 4. Common piers 2 are set at both ends of the station, and a sliding bearing 5 structure is set on the top of the common pier 2. One side of the sliding bearing 5 structure is connected to the station prestressed cap beam 3, and the other side of the sliding bearing 5 structure is connected to the interval bridge 4. The common piers 2 are set on both sides, which can effectively support the prestressed cap beam 3 and the interval bridge 4. The intersection common pier is set at the interface between the station and the interval bridge 4, and a sliding bearing 5 is set on the top of the pier, such as a spherical bearing, which is connected to the station prestressed cap beam 3 on one side and to the interval bridge 4 on the other side. The spherical bearing adopts a sliding bearing 5, which releases the longitudinal constraint along the station and limits the lateral displacement constraint along the station, effectively reducing the adverse effects of temperature stress during the station structure's service period.

[0039] Each common pier 2 is provided with a sliding support 5 structure, and the sliding support 5 structure is composed of sliding supports 5. The sliding supports 5 of each sliding support 5 structure are set to one, two or at least three. The sliding support 5 is used to release the longitudinal constraints along the station and limit the lateral displacement constraints along the station. It should be noted that longitudinal movement and lateral fixation are merely functional descriptions, and all structures that can realize this function fall within the scope of protection of the present invention.

[0040] The main structure of the station utilizes a two-column reinforced concrete frame. The concourse level utilizes cantilevered prestressed beams at both ends. Prestressed cap beams are provided with upper columns to support the structure above the platform level. The platform and concourse floor slabs utilize a densely packed steel reinforcement to minimize the adverse effects of thermal stress on the structure, which can cause cracks.

[0041] like Figure 2 As shown, a track platform and a building platform are mounted on the prestressed cap beam 3. A first reinforced concrete beam 6 is mounted on the track platform for mounting the track, while a second reinforced concrete beam is mounted on the building platform for supporting the platform structure. The track platform and building platform are functional divisions and do not represent a clear division of the structure; the two functional areas can be connected.

[0042] The concept of shared columns 2 was mentioned earlier. To distinguish them, single-support columns are installed between the shared columns 2 on both sides of the station. A crossbeam is installed on the single-support column to support the first reinforced concrete beam 6 and the second reinforced concrete beam. The entire support system includes shared columns 2 and single-support columns. The prestressed cap beam 3 and crossbeam installed on them can support the first reinforced concrete beam 6 and the second reinforced concrete beam.

[0043] Furthermore, the present invention discloses a connection structure between a prestressed cap beam 3 and ordinary reinforced concrete beams (a first reinforced concrete beam 6 and a second reinforced concrete beam). The prestressed cap beam 3 at the interface between the station and the section bridge 4 serves as a support point for the ordinary reinforced concrete beams along the longitudinal direction of the platform level. In other words, the ordinary reinforced concrete beams serve as secondary beams, and the prestressed cap beam 3 serves as the primary beam.

[0044] The prestressed cap beam 3 is provided with a beam upper column to support the platform layer structure. The beam upper column can provide effective support, making the platform layer structure more stable; Figure 3 As shown, each sliding support 5 structure is provided with two sliding supports 5 , and the two sliding supports 5 are used to support the station prestressed cap beam 3 and the interval bridge 4 respectively.

[0045] One embodiment of the present invention provides a specific structure of the sliding support 5. Figure 4 As shown, the sliding support 5 includes an upper mating seat 5.1, an upper support member 5.3, a lower support member 5.5, and a lower mating seat 5.6. The upper mating seat 5.1 is fixed to the upper support member 5.3, and the lower support member 5.5 is fixed to the lower mating seat 5.6. The upper support member 5.3 can be made of a rectangular plate, and the lower support member 5.5 can also be made of a rectangular plate. The upper support member 5.3 and the lower support member 5.5 can also be circular or other shapes. It should be noted that the upper support member 5.3 and the lower support member 5.5 are made of stainless steel plate.

[0046] The upper and lower mating seats 5.1 and 5.6 work in conjunction with each other. The upper mating seat 5.1 has a raised arc-shaped portion, while the lower mating seat 5.6 has a groove that mates with the arc-shaped portion and allows the arc-shaped portion to slide in the groove. The groove is oriented in the longitudinal direction of the station, releasing the longitudinal displacement constraint while limiting the lateral displacement of the station.

[0047] During use, due to the fit between the arcuate portion and the groove, lateral movement is sometimes unavoidable. Therefore, to prevent this from happening, the present invention provides a guide plate 5.4 between the upper support member 5.3 and the lower support member 5.5. The guide plate 5.4 can move longitudinally along the station, but cannot move transversely along the station. Furthermore, the guide plate 5.4 is bolted to the upper support member 5.3 and the lower support member 5.5, respectively.

[0048] To prevent the upper and lower mating seats 5.1 and 5.6 from jamming during relative motion, a ball 5.2 is embedded in the lower mating seat 5.6. The ball 5.2 can be made of steel or other high-strength materials. At least two-thirds of the ball 5.2's volume is embedded in the lower mating seat 5.6, and there is a gap between the ball 5.2 and the mounting groove in the lower mating seat 5.6. This gap is generally 0.1mm-0.5mm.

[0049] Since the deformation and movement distance of the guide plate 5.4 are limited, a better design is to set the guide plate 5.4 as two connecting plates, which are hinged between the two connecting plates. By adding connecting parts and expanding the gap between the connecting plates, the upper mating seat 5.1 and the lower mating seat 5.6 can achieve a greater relative movement in the longitudinal direction of the platform.

[0050] A track platform is set in the middle of the prestressed cap beam 3, and building platforms are set on both sides of the prestressed cap beam 3, making the entire prestressed cap beam 3 a bilaterally symmetrical structure. Two second reinforced concrete beams are set on the building platforms on both sides of the prestressed cap beam 3, and four first reinforced concrete beams 6 are set on the track platform in the middle of the prestressed cap beam 3.

[0051] The length of the prestressed cap beam 3 on the common column 2 is at least 1 / 3 of the thickness of the common column 2. The length of the section bridge 4 (prefabricated bridge) on the common column 2 is at least 1 / 3 of the thickness of the common column 2. This installation length limit is intended to ensure a more secure structure and prevent the prestressed cap beam 3 or section bridge 4 from slipping.

[0052] Since the present invention does not provide a temperature expansion joint, it solves a series of problems caused by expansion joints. However, considering phenomena such as concrete shrinkage, in order to better adapt to the elevated station structure combined with bridge construction, the present invention provides a plurality of first reinforced concrete beams 6 along the length direction of the station. The first reinforced concrete beams 6 in the same longitudinal direction constitute the longitudinal structure 1, and a post-cast strip 1 is provided on the longitudinal structure 1. A plurality of second reinforced concrete beams are provided along the length direction of the station. The second reinforced concrete beams in the same longitudinal direction constitute the longitudinal structure 2, and a post-cast strip 1 is provided on the longitudinal structure 2. Providing the post-cast strip 1 along the length direction of the station completely solves the temperature stress caused by concrete shrinkage and creep during the construction phase due to the excessive length of the station.

[0053] In one embodiment of the present invention, a method for constructing a bridge-construction combined elevated station structure is provided, comprising:

[0054] a. Construct the main foundation and single-support pier of the station, cast the crossbeam on the single-support pier and the second reinforced concrete beam on the crossbeam, and reserve a post-cast strip 1; that is, cast the upper concrete structure except the prestressed cap beam 3 at the interface position of the station end, and reserve two 700-1000mm (preferably 800mm) wide post-cast strips 1 at one-third and two-thirds of the length of the station. The post-cast strips 1 should be selected at locations with less structural stress;

[0055] b. Construct the common pier 2 where the station meets the section bridge 4, construct the support pedestal at the top of the common pier 2, and install the sliding bearing 5. The sliding bearing 5 releases the displacement constraint along the longitudinal direction of the station and limits the lateral displacement along the station;

[0056] c. Cast the prestressed cap beam 3 and the first reinforced concrete beam 6 of the platform layer at the end of the station and reserve the corresponding post-cast strip 1;

[0057] d. Erect the prefabricated bridge at each end of the interval bridge 4 on the upper part of the common pier 2, and install the sliding bearing 5 at the corresponding position;

[0058] e. 50-70 days (for example, 60 days) after the main structure of the station is completed, use micro-expansive concrete with a strength one level higher than that of the station structure concrete to complete the station post-casting strip 1. The longitudinal load-bearing steel bars of the structure at the post-casting strip 1 should be passed through, and reinforced steel bars should be used.

[0059] The present invention describes a combined bridge-construction elevated station structure for ground-level elevated stations in urban rail transit. This station structure lacks expansion joints, but instead incorporates two post-cast strips (1) at one-third and two-thirds of the station's length. Furthermore, sliding bearings (5) are installed at the interface between the station and the section bridge (4), effectively mitigating the adverse effects of thermal stress during the station's operational life.

[0060] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as covering the preferred embodiments and all changes and modifications that fall within the scope of the invention. The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. An elevated station structure combining a bridge and a building, characterized by: A common pier is set at the interface between the station end and the interval bridge. Common piers are set at both ends of the station. A sliding support structure is set on the top of the common pier. One side of the sliding support structure is connected to the station prestressed cap beam, and the other side of the sliding support structure is connected to the interval bridge. Each common pier is provided with a sliding support structure, and each sliding support structure is provided with one, two or at least three sliding supports. The sliding support includes an upper matching seat, a ball, a guide plate and a lower matching seat. The ball is embedded in the groove of the lower matching seat, and the direction of the groove is consistent with the longitudinal direction of the station. The sliding support is used to release the longitudinal constraint along the station and limit the lateral displacement constraint along the station; A track platform and a building platform are arranged on the prestressed cap beam. A first reinforced concrete beam is arranged on the track platform for installing the track. A second reinforced concrete beam is arranged on the building platform for supporting the platform building. Several first reinforced concrete beams are arranged along the length of the station. The first reinforced concrete beams in the same longitudinal direction constitute the longitudinal structure 1. A post-cast strip is arranged on the longitudinal structure 1. The post-cast strip is cast with slightly expansive concrete that is one level higher in strength than the station structure concrete. The sliding support also includes an upper support member and a lower support member. A guide plate is provided between the upper support member and the lower support member. The guide plate can move longitudinally along the station but cannot move transversely along the station.

2. The elevated station structure combined with a bridge and a building according to claim 1, characterized in that: Single support piers are set between the common piers on both sides of the station. Cross beams are set on the single support piers, and the cross beams are used to support the first reinforced concrete beam and the second reinforced concrete beam.

3. The elevated station structure combined with a bridge and a building according to claim 1, characterized in that: Each sliding bearing structure is provided with two sliding bearings, and the two sliding bearings are used to support the station prestressed cap beam and the section bridge respectively.

4. The bridge-construction combined elevated station structure according to claim 1, characterized in that: A track platform is set in the middle of the prestressed cap beam, and building platforms are set on both sides of the prestressed cap beam. The entire prestressed cap beam has a bilaterally symmetrical structure.

5. The elevated station structure combined with a bridge and a building according to claim 4, characterized in that: Two second reinforced concrete beams are respectively arranged on the building platforms on both sides of the prestressed cap beam, and four first reinforced concrete beams are arranged on the track platform in the middle of the prestressed cap beam.

6. The elevated station structure combined with a bridge and a building according to claim 1, characterized in that: The length of the prestressed cap beam on the common column shall be at least 1 / 3 of the thickness of the common column.

7. The elevated station structure combined with a bridge and a building according to claim 1 or 6, characterized in that: The length of the interval bridge on the common pier is at least 1 / 3 of the thickness of the common pier.

8. The elevated station structure combined with a bridge and a building according to claim 1, characterized in that: A plurality of first reinforced concrete beams are arranged in the longitudinal direction of the station. The first reinforced concrete beams in the same longitudinal direction constitute a longitudinal structure 1, and a post-cast strip is arranged on the longitudinal structure 1.

9. The elevated station structure combined with a bridge and a building according to claim 1 or 8, characterized in that: Several second reinforced concrete beams are arranged in the length direction of the station. The second reinforced concrete beams in the same longitudinal direction constitute the longitudinal structure 2, and a post-cast strip is arranged on the longitudinal structure 2.

10. The construction method of a bridge-building combined elevated station structure according to claim 1, characterized in that: include: a. Construct the main foundation and single-support pier of the station, pour the crossbeam on the single-support pier and the second reinforced concrete beam on the crossbeam, and reserve a post-cast strip; b. Construct the common pier where the station meets the section bridge, construct the support pad stone at the top of the common pier, and install the sliding bearing. The sliding bearing includes an upper mating seat, a ball bearing, a guide plate, and a lower mating seat. The guide plate is connected by bolts to limit lateral displacement. The sliding bearing releases the displacement constraint along the longitudinal direction of the station and limits lateral displacement along the station. c. Cast the prestressed cap beam and the first reinforced concrete beam of the platform layer at the end of the station and reserve the corresponding post-casting strips; d. Erect the prefabricated bridge at the end of the interval bridge on the top of the common pier and install the sliding bearings at the corresponding positions; e. 50-70 days after the main structure of the station is completed, use micro-expansive concrete with a strength one level higher than the concrete of the station structure to complete the station post-cast joint.

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