A fully assembled frame structure across a high-speed railway and a construction method thereof

Abstract

The present invention relates to a fully assembled frame structure across a high-speed railway and a construction method. The fully assembled frame structure across a high-speed railway comprises a foundation, a bottom joint section, a steel column, a top joint section, a cross beam and an upper beam body. The bottom of the steel column and the foundation are assembled and connected via the bottom joint section, the top of the steel column and the cross beam are assembled and connected via the top joint section, and the top of the cross beam is provided with an upper beam body. The advantages of prefabricated assembly method such as being green and environmentally friendly, having little construction interference and high speed are brought into play. When crossing a high-speed railway, the fully assembled rapid construction of the frame structure is realized, the on-site construction time is greatly shortened, and the impact on the operation of the high-speed railway is minimized.

Description

Technical Field

[0001] The present invention relates to the field of bridge construction, and in particular to a fully assembled frame structure across a high-speed railway and a construction method thereof. Background Art

[0002] Safety is the eternal theme of railway transportation and production. Construction safety, especially construction safety of operating lines, is one of the major issues that need to be considered in railway engineering construction. At present, when new railway projects cross operating railways, frame pier structures are often used for crossing. In railway construction projects, there are many frame pier projects that cross operating railways every year. The design and construction safety risks are relatively large. With the dense road network, there will be more and more such crossing projects in the future, and the risks will become more obvious. How to reduce the impact on operating railways and ensure the safe implementation of projects is one of the topics that need to be studied in depth. When the frame pier project crossing the operating railway is cast-in-place, it is necessary to set up brackets, support formwork, tie steel bars, pour concrete near the operating line, and then carry out maintenance, remove formwork, and remove brackets. There are many construction processes and long cycles. There are many on-site machinery and equipment and supporting measures. There is a large demand for labor, many hidden dangers in night operations, and there are high risks of bracket and formwork collapse and falling objects. Construction needs to be carried out during train downtime, which has a great impact on operating railways, especially high-speed railways and busy trunk lines. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a fully assembled frame structure across a high-speed railway, comprising a foundation, a bottom connecting section, steel columns, a top connecting section, a cross beam and an upper beam body, wherein the bottom of the steel column and the foundation are assembled and connected via the bottom connecting section, the top of the steel column and the cross beam are assembled and connected via the top connecting section, and an upper beam body is arranged on the top of the cross beam.

[0004] Preferably, a pressure plate is provided at the bottom of the steel column, the pressure plate is provided with an opening, and stiffening plates are provided on both sides of the bottom steel rod. A bottom shear key and an open rib are provided at the connection between the steel column and the bottom connecting section. The open rib is arranged vertically, and the longitudinal rib is provided inside the steel column. A circular hole is provided above the longitudinal rib. The top connecting steel bar penetrates into the interior of the top connecting section and passes through the top of the steel column. The top connecting steel bar is connected to the longitudinal rib by welding. One end of the top steel rod is embedded in the steel column, and the other end extends out of the steel column.

[0005] Preferably, bottom connecting steel bars and bottom steel rods are embedded in the foundation, the bottom connecting steel bars are located around the inner and outer sides of the steel columns, the openings of the pressure plate correspond to the bottom steel rods, and the bottom steel rods are locked and connected to the pressure plate.

[0006] Preferably, the bottom connecting section is arranged around the steel column, the top of the bottom connecting section is inclined, perforated steel bars are arranged on the perforated ribs, the bottom connecting steel bars are respectively connected to the bottom shear keys and the perforated ribs, and the steel cover plate is inclined at the top of the bottom connecting section.

[0007] Preferably, the steel columns are filled with intra-column concrete.

[0008] Furthermore, a supporting plate is arranged between the concrete in the column and the crossbeam, the crossbeam is supported on the supporting plate, the crossbeam and the top steel rod are locked by a locking pad, a top combining section is cast in the concrete cavity between the crossbeam and the column, the top combining section and the top connecting steel bar form a grip and are connected to the crossbeam.

[0009] Furthermore, an opening is provided at the bottom of the crossbeam, the contour of the opening should be larger than the outer contour of the top connecting steel bar, an I-shaped steel plate is provided inside the opening, a top shear key is provided on the I-shaped steel plate, a circular hole is provided on the I-shaped steel plate corresponding to the top steel rod, and the I-shaped steel plate is connected to both sides of the bottom opening of the crossbeam.

[0010] Based on the same inventive concept, the present invention also provides a construction method for a fully assembled frame structure across a high-speed railway, comprising:

[0011] Foundation construction, pre-embedded bottom connecting steel bars and bottom steel bars in the foundation.

[0012] The steel columns and beams are prefabricated in the factory, the bottom joints are laid on the top surface of the foundation, the steel columns are hoisted, the bottom steel rods are inserted into the openings on the pressure plate, and the bottom steel rods are locked.

[0013] Insert the perforated steel bars into the perforated rib plate, pour the bottom joint section concrete, and complete the assembly of the two steel columns and the foundation in sequence.

[0014] Fill the steel column with concrete, lay the top joint, hoist the crossbeam temporarily on the supporting plate, insert the top steel rod into the round hole on the I-shaped steel plate, and tighten the top steel rod; at the same time, insert the top connecting steel bar into the top joint section.

[0015] Pour the concrete of the top joint section, complete the assembly between the beams and the columns, complete the entire assembly of the frame structure, and erect the upper beam.

[0016] Compared with the closest prior art, the present invention has the following beneficial effects:

[0017] The stability of steel columns and beams during installation is ensured to avoid affecting the operation of high-speed railways during the installation process. No large-scale construction machinery is required during the construction process, which has little interference with railway operations. It has excellent seismic performance and is suitable for high-seismic areas. It overcomes the difficulty of conventional prefabricated structures in adapting to the complex force requirements of frame structures, realizes the full-assembly rapid construction of frame structures, and is suitable for frame pier structures with various column heights and beam spans, which greatly shortens the on-site construction time and minimizes the impact on high-speed railway operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of a fully assembled frame structure across a high-speed railway provided by the present invention;

[0019] Figure 2 It is a schematic diagram of the basic structure of a fully assembled frame structure across a high-speed railway provided by the present invention;

[0020] Figure 3 It is a schematic diagram of a connection structure between a column and a foundation in a fully assembled frame structure across a high-speed railway provided by the present invention, wherein 3-a is a main view, 3-b is an AA section view in 3-a, and 3-c is a BB section view in 3-a;

[0021] Figure 4 It is a schematic diagram of the connection structure of the column and the crossbeam in a fully assembled frame structure across a high-speed railway provided by the present invention, wherein 4-a is a front view, 4-b is a CC section view in 4-a, and 4-c is a DD section view in 4-a;

[0022] Figure 5 The present invention provides a schematic plan view of the installation of columns and beams in a fully assembled frame structure across a high-speed railway.

[0023] Description of reference numerals:

[0024] 1. Foundation; 101. Bottom connecting steel bars; 102. Bottom steel bars; 103. Bottom joints; 2. Bottom joint section; 201. Perforated steel bars; 202. Steel cover plate; 3. Steel column; 301. Pressure plate; 302. Stiffening plate; 303. Bottom shear key; 304. Perforated rib plate; 305. Longitudinal rib; 306. Partition plate; 307. Top connecting steel bars; 308. Top steel bars; 4. Concrete in column; 5. Top joint section; 501. Top joint; 502. Support plate; 503. Locking pad; 6. Crossbeam; 601. I-shaped steel plate; 602. Top shear key; 7. Upper beam body. DETAILED DESCRIPTION

[0025] The specific implementation modes of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution 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 creative work are within the scope of protection of the present invention.

[0027] Embodiment 1:

[0028] The present invention provides a fully assembled frame structure across a high-speed railway, such as Figure 1As shown, it includes a foundation 1, a bottom combining section 2, a steel column 3, a top combining section 5, a cross beam 6 and an upper beam body 7. The bottom of the steel column 3 is assembled and connected with the foundation 1 through the bottom combining section 2, the top of the steel column 3 is assembled and connected with the cross beam 6 through the top combining section 5, the top of the cross beam 6 is provided with an upper beam body 7, the bottom of the steel column 3 is provided with a pressure plate 301, the pressure plate 301 is provided with an opening, and a stiffening plate 302 is provided on both sides of the bottom steel rod 102. The connection between the steel column 3 and the bottom combining section 2 is provided with a bottom shear key 303 and a perforated rib plate 304, and the opening The perforated rib plate 304 is arranged vertically, and the longitudinal rib 305 is arranged inside the steel column 3. A circular hole is arranged above the longitudinal rib 305. The top connecting steel bar 307 penetrates into the top joint section 305 and passes through the top of the steel column 3. The top connecting steel bar 307 is connected to the longitudinal rib (305) by welding. One end of the top steel rod 308 is embedded in the steel column 3, and the other end extends out of the steel column 3. The bottom connecting steel bar 101 and the bottom steel rod 102 are embedded in the foundation 1. The bottom connecting steel bar 101 is located around the inner and outer sides of the steel column 3. The opening of the pressure plate 301 corresponds to the bottom steel rod 102. The bottom steel rod 102 is locked and connected with the pressure plate 301, the bottom joint section 2 is arranged around the steel column 3, the top of the bottom joint section 2 is inclined, the perforated rib plate 304 is provided with a perforated steel bar 201, the bottom connecting steel bar 101 is respectively connected with the bottom shear key 303 and the perforated rib plate 304, the steel cover plate 202 is inclinedly arranged at the top of the bottom joint section 2, the steel column 3 is filled with column concrete 4, a support plate 502 is arranged between the column concrete 4 and the beam 6, the beam 6 is supported on the support plate 502, the beam 6 and the top The steel rod 308 is locked by a locking pad 503, and a top connecting section 5 is cast in the cavity of the concrete 4 in the column and the cross beam 6. The top connecting section 5 forms a grip with the top connecting steel bar 307 and is connected to the cross beam 6. An opening is provided at the bottom of the cross beam 6, and the contour of the opening should be larger than the outer contour of the top connecting steel bar 307. An I-shaped steel plate 601 is provided inside the opening, and a top shear key 602 is provided on the I-shaped steel plate 601. A circular hole is provided on the I-shaped steel plate 601 corresponding to the top steel rod 308, and the I-shaped steel plate 601 is connected to both sides of the bottom opening of the cross beam 6.

[0029] Embodiment 2:

[0030] The present invention provides a construction method of a fully assembled frame structure across a high-speed railway, comprising a foundation 1, a bottom joint section 2, a steel column 3, concrete in the column 4, a top joint section 5, a cross beam 6 and an upper beam body 7. The foundation 1 is cast-in-place on site, the steel column 3 and the cross beam 6 are prefabricated in a factory, the steel column 3 and the foundation 1 are assembled and connected through the bottom joint section 2, the concrete in the column 4 is filled in the steel column 3, the steel column 3 and the cross beam 6 are assembled and connected through the top joint section 5, and the upper beam body 7 is erected after the frame structure is fully assembled.

[0031] Bottom connecting steel bars 101 and bottom steel rods 102 are pre-embedded in the foundation 1 . The bottom connecting steel bars 101 are located around the inner and outer sides of the steel columns 3 . The bottom steel rods 102 correspond one-to-one to the openings on the pressure plate 301 .

[0032] A pressure plate 301 is provided at the bottom of the steel column 3, and openings are provided on the pressure plate 301, which correspond to the bottom steel rods 102 one by one. The bottom steel rods 102 are locked on the pressure plate 301, and the stiffening plates 302 are located on both sides of each bottom steel rod 102. When the bottom steel rods 102 are subjected to force, the load is transferred to the steel column 3; a bottom shear key 303 and a perforated rib plate 304 are provided at the connection between the steel column 3 and the bottom connecting section 2. The perforated rib plate 304 is arranged vertically to solve the problem of excessive local stress in the top connection area and prevent local cracking of the concrete of the bottom connecting section 2 in this area.

[0033] The bottom joint section 2 is cast around the steel column 3, with a slope at the top. Perforated steel bars 201 are provided on the perforated ribs 304 to connect the bottom connecting steel bars 101 with the bottom shear keys 303 and perforated ribs 304 on the steel column 3; the steel cover plate 202 is located at the top of the bottom joint section 2 and is arranged on a slope to facilitate drainage and ensure the durability of the joint between the concrete of the bottom joint section 2 and the steel column 3. The bottom joint section 2 is made of fiber concrete or ultra-high performance concrete. The ultra-high performance concrete is used to ensure the anchoring strength of the connecting steel bars on the one hand, and on the other hand, when the column is under pressure, the ultra-high performance concrete provides super strong compressive resistance to improve the ductility of the structure. The ultra-high performance concrete forms a hoop effect around the steel column 3, which enhances the seismic resistance of the bottom connection.

[0034] The inner concrete 4 is filled in the steel column 3 from bottom to top using self-compacting shrinkage compensating concrete. The inner concrete 4 ensures the durability of the interior of the steel column 3. At the same time, when crossing a high-speed railway, a solid structure is used inside to improve the anti-collision performance.

[0035] The longitudinal rib 305 is arranged inside the steel column 3, and a circular hole is arranged above the longitudinal rib 305 to form a shear key with the concrete 4 in the column, thereby enhancing the bonding ability and coordinated force between the steel column 3 and the concrete 4 in the column.

[0036] The top connecting steel bar 307 extends out of the top of the steel column 3 and penetrates into the top joint section 5. The top connecting steel bar 307 is welded to the longitudinal rib 305, or is anchored to the partition 306 by bolts to achieve the connection between the top connecting steel bar 307 and the steel column 3.

[0037] One end of the top steel rod 308 is embedded in the concrete 4 in the steel column 3, and the other end extends out of the steel column 3. The top steel rod 308 realizes the positioning and locking of the cross beam 6 during installation, ensures the stability of the cross beam 6 during installation, and serves as a permanent measure to enhance the shear resistance between the cross beam 6 and the steel column 3. The support plate 502 is arranged between the concrete 4 in the column and the cross beam 6. The cross beam 6 is temporarily supported on the support plate 502, and the top steel rod 308 is locked with the cross beam 6 through the locking pad 503.

[0038] The top connecting section 5 is cast in a cavity formed by the cross beam 6 and the concrete 4 in the column, forms a grip with the top connecting steel bars 307, and is connected to the cross beam 6.

[0039] An opening is provided at the bottom of the cross beam 6, and the outline of the opening is larger than the outer outline of the top connecting steel bar 307, so that the top connecting steel bar 307 can be inserted into the top connecting section 5. An I-shaped steel plate 601 is arranged inside the opening, and a top shear nail 602 is provided on the I-shaped steel plate 601. The I-shaped steel plate 601 is smaller than the outer outline of the top connecting steel bar 307 and does not affect the top connecting steel bar 307 from being inserted into the top connecting section 5. The I-shaped steel plate 601 is provided with circular holes corresponding to the top steel bars 308 one by one. The I-shaped steel plate 601 is connected to both sides of the opening at the bottom of the cross beam 6 to ensure that the cross beam 6 can withstand tension at the bottom.

[0040] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0041] The present invention is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0042] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0043] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A fully assembled frame structure across a high-speed railway, characterized in that: It comprises a foundation (1), a bottom connecting section (2), a steel column (3), a top connecting section (5), a cross beam (6) and an upper beam body (7), wherein the bottom of the steel column (3) and the foundation (1) are assembled and connected via the bottom connecting section (2), the top of the steel column (3) and the cross beam (6) are assembled and connected via the top connecting section (5), and the top of the cross beam (6) is provided with an upper beam body (7); A pressure plate (301) is provided at the bottom of the steel column (3), the pressure plate (301) is provided with an opening, a stiffening plate (302) is provided on both sides of the bottom steel bar (102), a bottom shear key (303) and an opening rib plate (304) are provided at the connection between the steel column (3) and the bottom joint section (2), the opening rib plate (304) is arranged vertically, a longitudinal rib (305) is provided inside the steel column (3), a circular hole is provided above the longitudinal rib (305), a top connecting steel bar (307) penetrates into the top joint section (5) and passes through the top of the steel column (3), the top connecting steel bar (307) and the longitudinal rib (305) are connected by welding, one end of the top steel bar (308) is pre-embedded in the steel column (3), and the other end protrudes out of the steel column (3); The steel column (3) is filled with column concrete (4); A support plate (502) is provided between the concrete (4) in the column and the cross beam (6), the cross beam (6) is supported on the support plate (502), the cross beam (6) and the top steel bar (308) are locked by means of a locking pad (503), a top connecting section (5) is cast in the cavity between the cross beam (6) and the concrete (4) in the column, the top connecting section (5) and the top connecting steel bar (307) form a grip and are connected to the cross beam (6); The bottom of the cross beam (6) is provided with an opening, the outline of the opening should be larger than the outer outline of the top connecting steel bar (307), an I-shaped steel plate (601) is provided inside the opening, a top shear key (602) is provided on the I-shaped steel plate (601), a circular hole is provided on the I-shaped steel plate (601) corresponding to the top steel bar (308), and the I-shaped steel plate (601) is connected to both sides of the bottom opening of the cross beam (6).

2. A fully assembled frame structure across a high-speed railway as claimed in claim 1, characterized in that: Bottom connecting steel bars (101) and bottom steel bars (102) are pre-embedded in the foundation (1); the bottom connecting steel bars (101) are located around the inner and outer sides of the steel column (3); the openings of the pressure plate (301) correspond to the bottom steel bars (102); and the bottom steel bars (102) are locked and connected to the pressure plate (301).

3. A fully assembled frame structure across a high-speed railway as claimed in claim 1, characterized in that: The bottom joint section (2) is arranged around the steel column (3), the top of the bottom joint section (2) is arranged obliquely, a perforated steel bar (201) is arranged on the perforated rib plate (304), the bottom connecting steel bar (101) is respectively connected to the bottom shear key (303) and the perforated rib plate (304), and the steel cover plate (202) is arranged obliquely on the top of the bottom joint section (2).

4. A construction method for a fully assembled frame structure across a high-speed railway according to any one of claims 1 to 3, characterized in that: include: Construction of the foundation (1), pre-embedded bottom connecting steel bars (101) and bottom steel bars (102) in the foundation (1); The steel columns (3) and the cross beams (6) are prefabricated in a factory, a bottom joint (103) is laid on the top surface of the foundation (1), the steel columns (3) are hoisted, the bottom steel rods (102) are inserted into the openings on the pressure plate (301), and the bottom steel rods (102) are locked; Inserting the perforated steel bars (201) into the perforated rib plate (304), pouring concrete in the bottom joint section (2), and sequentially completing the assembly of the two steel columns (3) and the foundation (1); Fill the steel column (3) with column concrete (4), lay the top joint (501), hoist the crossbeam (6) and temporarily support it on the support plate (502), insert the top steel rod (308) into the circular hole on the I-shaped steel plate (601), and tighten the top steel rod (308); at the same time, insert the top connecting steel bar (307) into the top joint section (5); The top joint section (5) is poured with concrete, the assembly between the cross beam (6) and the column is completed, the entire frame structure is assembled, and the upper beam body (7) is erected.

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