A bridge project over an operating railway line and a construction method thereof

Abstract

The present invention discloses a bridge project over an operating line railway and a construction method thereof, which relates to the technical field of railway tracks, wherein the bottom end of a support column is fixedly mounted on a bridge, the top end of the support column is inserted into a socket, a fixing piece is arranged at the top end of the support column, a concrete filling layer is arranged between the fixing piece and the inner wall of the socket, the bottom end of a reinforcing steel pipe is embedded in the top center of the support column, two or more reinforcing steel bars are evenly arranged around the reinforcing steel pipe, the bottom end of a sliding rod is inserted into the reinforcing steel pipe, a striking seat is connected to the top end of the sliding rod, a collar is sleeved on the reinforcing steel bar, one end of a connecting bar is hinged to the striking seat, and the other end of the connecting bar is hinged to the collar, a track plate is arranged at the top of a support frame, and two parallel steel rails are fixed on the track plate. The device adopts a splicing structure, and the support frame and the track plate are prefabricated in a factory, which can not only reduce the construction difficulty and maintenance time, but also realize rapid leveling of the top surface of the support frame.

Description

Technical Field

[0001] The present invention relates to the technical field of railway tracks, and more specifically to a bridge project that crosses an operating railway line and a construction method thereof. Background Art

[0002] Railway tracks include ballastless tracks and ballasted tracks. Since ballastless tracks can adapt to the development of high-speed railways, they have been used more and more widely.

[0003] In the prior art, a Chinese invention patent with announcement number CN113584956B discloses an assembled track structure with built-in limit modules, wherein the base plate is cast on site to form a top surface with millimeter-level accuracy, or the base plate is prefabricated in a factory and cast on site on a supporting foundation to form a leveling adjustment layer, or the base plate is replaced with asphalt, high-performance concrete, or existing new materials, and is pressed down by the track plate during on-site casting to form a top surface with millimeter-level accuracy, an intermediate layer is laid on the base plate, and a track unit is laid on the intermediate layer, the track unit includes track plate modules arranged in sequence, and the track plate modules are prefabricated; the track unit also includes a limit stopper for elastically limiting the connected track plate modules in the longitudinal and transverse directions, and the lower end of the limit stopper is fixed to the base plate. However, the above technical solution still has the following defects: 1. The base plate is constructed by on-site casting, which is difficult to construct and takes a long time to maintain after casting, which greatly increases the construction period; 2. Since high smoothness of the track is the most basic condition for achieving high-speed operation of trains, in order to ensure the flatness of the end surface of the base plate, workers are required to perform scraping and leveling operations before the concrete solidifies, which is labor-intensive and is also subject to weather and seasonal restrictions. Summary of the invention

[0004] In order to overcome the defects of the prior art, the present invention proposes a bridge project crossing an operating railway line and a construction method thereof, which adopts a spliced ​​structure, and the supporting frame and the track plate are prefabricated in the factory, which can not only reduce the construction difficulty and maintenance time, but also achieve rapid leveling of the top surface of the supporting frame and shorten the construction period.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The present invention provides a bridge project over an operating railway line, comprising a rail bearing base arranged on the bridge and a steel rail arranged on the rail bearing base, wherein the rail bearing base is formed by splicing two or more splicing units, wherein the splicing units comprise a support column, a fixing piece, a support frame, a concrete filling layer and a track plate, wherein a casting trough is arranged on the top of the support frame, a plug hole is arranged on the bottom of the casting trough, the bottom end of the support column is fixed on the bridge, the top end of the support column is plugged into the plug hole, a fixing piece is arranged on the top end of the support column, and a concrete filling layer is arranged between the fixing piece and the inner wall of the plug hole The fixing parts include a reinforcing steel pipe, a reinforcing steel bar, a sliding rod, a knocking seat, a connecting rib and a ring. The bottom end of the reinforcing steel pipe is embedded in the top center of the supporting column. More than two reinforcing steel bars are evenly arranged around the reinforcing steel pipe, and the bottom end of the reinforcing steel bar is embedded in the top of the supporting column. The bottom end of the sliding rod is inserted into the reinforcing steel pipe, and the top of the sliding rod is connected with a knocking seat. The reinforcing steel bar is provided with a ring. One end of the connecting rib is hinged to the knocking seat, and the other end of the connecting rib is hinged to the ring. A track plate is provided on the top of the supporting frame, and two parallel steel rails are fixed on the track plate.

[0007] In a preferred technical solution of the present invention, a reinforcement ring is also sleeved on the outside of the reinforced steel pipe, and more than two positioning holes are evenly opened on the reinforcement ring. The reinforcing steel bars are plugged into the positioning holes, and the number of positioning holes and reinforcing steel bars is equal and one-to-one corresponding.

[0008] In a preferred technical solution of the present invention, positioning nuts are coaxially arranged on both upper and lower sides of the positioning hole, and the positioning nuts are threadedly connected to the reinforcing steel bars.

[0009] In a preferred technical solution of the present invention, more than two grooves are provided on the inner bottom wall of the casting trough, and a clamping groove connected to the groove is provided on the side wall of the casting trough, and the collar is plugged into and matched with the clamping groove.

[0010] In a preferred technical solution of the present invention, a vulcanized rubber cushion layer is provided in the gap between two adjacent track plates.

[0011] In a preferred technical solution of the present invention, T-slots are further provided at both ends of the support frame, and the T-slots on two adjacent support frames are aligned to form an I-slot, an I-beam is provided in the I-slot to connect the two adjacent support frames, and a buffer layer is provided in the gap between the I-beam and the inner side wall of the I-slot.

[0012] The present invention also provides a method for constructing a bridge project over an operating railway line, comprising the following steps:

[0013] Step 1: Construction preparation: clean the bridge deck;

[0014] Step 2: Construct the track bearing base: cast two rows of support columns on the bridge in advance, and fix the fixings on the top of the support columns; hoist the prefabricated support frame above the support columns, and align the sockets on the support frame with the support columns; lower the support frame so that the top of the support column is inserted into the socket, and ensure that the upper part of the fixings extends above the support frame; pour a concrete filling layer into the socket to connect the support column and the support frame as a whole; fix the prefabricated track plate on the support frame;

[0015] Step 3: Construct rails: Place two rails in parallel on the track plate, and connect and fix the rails to the track plate with a fastener assembly.

[0016] In the preferred technical solution of the present invention, in step 2, before pouring the concrete filling layer, first rotate the positioning nut to adjust the position of the reinforcement ring, and make the top surface of the positioning nut located above the reinforcement ring roughly flush with the inner bottom surface of the groove, and then knock the knocking seat to move it downward, and then the reinforcing steel bar is bent through the action of the connecting ribs and the ring. After the upper part of the reinforcing steel bar is bent, it will be stuck in the groove, and when the connecting ribs are rotated to a horizontal state, the end of the ring will be inserted into the slot to fix the free end of the reinforcing steel bar.

[0017] In a preferred technical solution of the present invention, in step 2, after the track plates are installed, a vulcanized rubber cushion layer is arranged in the gap between adjacent track plates to play a role in shock absorption and protection.

[0018] The beneficial effects of the present invention are:

[0019] The present invention proposes a bridge project over an operating line railway and a construction method thereof, which adopts a splicing structure, and the support frame and the track plate are prefabricated in the factory, which can not only reduce the construction difficulty and maintenance time, but also realize the rapid leveling of the top surface of the support frame, shortening the construction period. By knocking the knocking seat, more than two reinforcing steel bars can be synchronously bent and clamped into the grooves on the support frame to limit the freedom of the support frame in the vertical and horizontal directions, thereby preventing the support frame from sliding during the construction process. The operation is convenient, and when the connecting bar is rotated to a horizontal state, one end of the ring will be inserted into the clamping groove, thereby avoiding the rebound of the reinforcing steel bar and ensuring the casting quality of the concrete filling layer. In addition, the reinforcing steel bars, reinforced steel pipes and other structures located inside the concrete filling layer can increase the tensile, compressive and shear strength of the concrete filling layer, making the connection between the support column and the support frame more firmly. At the same time, due to the small volume of the concrete filling layer, the time required for maintenance is greatly shortened, and no other treatment is required during the maintenance process, reducing the labor intensity of the workers and the difficulty of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a structural schematic diagram of a bridge project over an operating railway provided by a specific embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the installation structure of the support frame and the support column;

[0022] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0023] Figure 4 yes Figure 2 A top view of

[0024] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0025] Figure 6 yes Figure 4 A partial enlarged view of point C in the middle.

[0026] In the figure:

[0027] 1. Rail-bearing base; 11. Support column; 12. Fixing piece; 121. Reinforced steel pipe; 122. Reinforced steel bar; 123. Sliding rod; 124. Striking seat; 125. Connecting rib; 126. Ring; 127. Reinforcement ring; 128. Positioning hole; 129. Positioning nut; 13. Support frame; 131. Casting trough; 132. Socket; 133. Groove; 134. Slot; 135. T-slot; 14. Concrete filling layer; 15. Track plate; 16. Vulcanized rubber cushion; 17. I-beam; 18. Buffer layer; 2. Rail. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0029] like Figure 1-6As shown, in the embodiment, a bridge project over an operating line railway is provided, comprising a rail bearing base 1 arranged on the bridge and a rail 2 arranged on the rail bearing base 1, the rail bearing base 1 is formed by splicing a plurality of splicing units, the splicing units comprising a support column 11, a fixing member 12, a support frame 13, a concrete filling layer 14 and a track plate 15, a casting trough 131 is arranged on the top of the support frame 13, a socket 132 is arranged on the bottom of the casting trough 131, the bottom end of the support column 11 is fixed on the bridge, the top end of the support column 11 is plugged into the socket 132, the top end of the support column 11 is provided with a fixing member 12, a concrete filling layer 14 is arranged between the fixing member 12 and the inner wall of the socket 132, the fixing member 12 comprises a reinforced steel pipe 12 1. Reinforced steel bar 122, sliding rod 123, knocking seat 124, connecting rib 125 and sleeve ring 126. The bottom end of the reinforcing steel pipe 121 is embedded in the top center of the support column 11. More than two reinforcing steel bars 122 are evenly arranged around the reinforcing steel pipe 121, and the bottom end of the reinforcing steel bar 122 is embedded in the top of the support column 11. The bottom end of the sliding rod 123 is inserted into the reinforcing steel pipe 121. The top of the sliding rod 123 is connected to the knocking seat 124. The reinforcing steel bar 122 is sleeved with a sleeve ring 126. One end of the connecting rib 125 is hinged to the knocking seat 124, and the other end of the connecting rib 125 is hinged to the sleeve ring 126. A track plate 15 is arranged on the top of the support frame 13, and two parallel rails 2 are fixed on the track plate 15. In this embodiment, the rail support base 1 is used to support the rail 2, and the top surface of the rail support base 1 is horizontal to ensure that the rail 2 is arranged horizontally after installation. Two steel rails 2 are provided, and both steel rails 2 are arranged along the length direction of the rail supporting base 1 .Among them, the support column 11 is a cross-shaped structure, and the support column 11 is arranged in two rows, and the support columns 11 in each row are arranged equidistantly, which is convenient for construction operations; the support frame 13 is a rectangular frame structure, which can reduce its own weight while ensuring structural strength, and the number of sockets 132 on the support frame 13 is equal to the number of support columns 11 and corresponds one to one, so as to ensure that the support frame 13 is uniformly stressed everywhere and improve the service life of the device; the fixing member 12 is used to assist in fixing the support column 11 and the support frame 13, so as to facilitate the pouring of the concrete filling layer 14, so as to realize the connection between the support column 11 and the support frame 13 as a whole, wherein the reinforcing steel pipe 121 and the reinforcing steel bar 122 are arranged vertically, and the bottom ends of the reinforcing steel pipe 121 and the reinforcing steel bar 122 are pre-cast on the support The column 11 helps to ensure the tensile strength of the reinforcing steel bar 122 and the support column 11, making the connection between the support column 11 and the support frame 13 more secure. The sliding rod 123 can slide up and down in the reinforcing steel pipe 121, and the ring 126 can slide on the reinforcing steel bar 122. The seat 124 is struck by a hammer to move it downward, and then it acts on the ring 126 through the connecting rib 125 to bend the reinforcing steel bar 122. When the upper part of the reinforcing steel bar 122 is bent to a horizontal state, the up and down degrees of freedom and horizontal degrees of freedom of the support frame 13 can be limited. After the concrete filling layer 14 is poured, the internal reinforcing steel bar 122 can significantly improve the tensile, compressive and shear strength of the concrete filling layer 14, thereby ensuring the overall strength of the device. In addition, when the connecting rib 125 is rotated to a horizontal state, the top surface of the knocking seat 124 should be ensured to be lower than the top surface of the support frame 13, so that the knocking seat 124 can be completely covered in the concrete filling layer 14, which helps to improve the aesthetics of the device; a shock-absorbing cushion layer is also provided between the track plate 15 and the support frame 13 to isolate the vibration from the upper part of the track plate 15 and improve the service life of the device. The shock-absorbing cushion layer is preferably a cement emulsified asphalt mortar layer or a vulcanized rubber layer or other materials with strong compressive resistance and certain elasticity to play a role in isolating vibration; the track plate 15 is connected to the support frame 13 by fixing bolts. Since the support frame 13 and the track plate 15 are prefabricated in the factory, the flatness of the end surface can be ensured, and it is also convenient to level during installation.

[0030] Specifically, a reinforcing ring 127 is also sleeved on the outside of the reinforcing steel pipe 121, and more than two positioning holes 128 are evenly opened on the reinforcing ring 127. The reinforcing steel bars 122 are plugged into the positioning holes 128, and the number of positioning holes 128 and reinforcing steel bars 122 is equal and one-to-one corresponding. In this embodiment, the inner diameter of the reinforcing ring 127 should be larger than the outer diameter of the reinforcing steel pipe 121, and the outer diameter of the reinforcing ring 127 should be smaller than the diameter of the insertion hole 132, so that the concrete can flow down along the gap between the reinforcing ring 127 and the inner wall of the reinforcing steel pipe 121 and the insertion hole 132, so as to fully fill the inner cavity of the insertion hole 132 and ensure the strength of the concrete filling layer 14 after pouring. The reinforcing ring 127 can slide up and down, and play a role in assisting the fixing of the reinforcing steel bars 122, which is convenient for construction operations. In addition, the reinforcing ring 127 can also enhance the shear resistance of the concrete filling layer 14.

[0031] Specifically, positioning nuts 129 are coaxially arranged on both upper and lower sides of the positioning hole 128, and the positioning nuts 129 are threadedly connected to the reinforcing steel bar 122. In this embodiment, the two positioning nuts 129 are symmetrically arranged on the upper and lower sides of the reinforcing ring 127, which can clamp and fix the reinforcing ring 127, and the position height of the reinforcing ring 127 can also be adjusted by rotating the positioning nuts 129.

[0032] Specifically, more than two grooves 133 are provided on the inner bottom wall of the casting trough 131, and a slot 134 connected to the groove 133 is provided on the side wall of the casting trough 131, and the collar 126 is plugged into the slot 134. In this embodiment, the number of the grooves 133 is equal to the number of the reinforcing steel bars 122 and corresponds one to one. When the upper part of the reinforcing steel bar 122 is bent to a horizontal state, it will be inserted into the groove 133 to prevent the support frame 13 from sliding on the horizontal plane. When the connecting bar 125 rotates to a horizontal state, one end of the collar 126 will be inserted into the slot 134, thereby preventing the reinforcing steel bar 122 from rebounding.

[0033] Specifically, a vulcanized rubber pad layer 16 is disposed in the gap between two adjacent track plates 15. In this embodiment, the vulcanized rubber pad layer 16 has a strong compression resistance and can buffer vibrations, and is disposed in the gap between two adjacent track plates 15, which can prevent the ends of the track plates 15 from rigidly contacting each other, thereby protecting the track plates 15.

[0034] Specifically, T-slots 135 are further provided at both ends of the support frame 13, and the T-slots 135 on two adjacent support frames 13 are aligned to form an I-slot, in which an I-steel 17 is provided to connect the two adjacent support frames 13, and a buffer layer 18 is provided in the gap between the I-steel 17 and the inner wall of the I-slot. In this embodiment, the T-slot 135 is a T-shaped structure, and the open end faces the side away from the support frame 13. The number of T-slots 135 on two adjacent support frames 13 is equal and one-to-one corresponding, and the I-steel 17 is clamped in the I-slot, and when the two support frames 13 are close to each other, the I-steel 17 can be squeezed, and vice versa, when the two support frames 13 are away from each other, the I-steel 17 will be stretched. The buffer layer 18 can be slightly deformed to adapt to the displacement of the support frame 13 caused by thermal expansion and contraction.

[0035] This embodiment also provides a method for constructing a bridge project over an operating railway line, comprising the following steps:

[0036] Step 1: Construction preparation: clean the bridge deck;

[0037] Step 2, construct the track bearing base 1: cast two rows of support columns 11 on the bridge in advance, and fix the fixings 12 on the tops of the support columns 11; hoist the prefabricated support frame 13 above the support columns 11, and align the sockets 132 on the support frame 13 with the support columns 11; lower the support frame 13, so that the tops of the support columns 11 are inserted into the sockets 132, and ensure that the upper parts of the fixings 12 extend above the support frame 13; pour the concrete filling layer 14 into the sockets 132, and connect the support columns 11 and the support frame 13 as a whole; hoist the prefabricated track plate 15 above the support frame 13 and fix it on the support frame 13;

[0038] Step 3, constructing the steel rails 2: placing two steel rails 2 in parallel on the track plate 15, and connecting and fixing the steel rails 2 and the track plate 15 via a fastener assembly.

[0039] Specifically, in step 2, before pouring the concrete filling layer 14, first rotate the positioning nut 129 to adjust the position of the reinforcement ring 127, and make the top surface of the positioning nut 129 located above the reinforcement ring 127 roughly flush with the inner bottom surface of the groove 133, and then knock the knocking seat 124 to move it downward, and then the reinforcing steel bar 122 is bent through the action of the connecting rib 125 and the ring 126. After the upper part of the reinforcing steel bar 122 is bent, it will be stuck in the groove 133, and when the connecting rib 125 is rotated to a horizontal state, the end of the ring 126 will be inserted into the slot 134 to fix the free end of the reinforcing steel bar 122.

[0040] Specifically, in step 2, after the track plates 15 are installed, a vulcanized rubber cushion layer 16 is arranged in the gap between adjacent track plates 15 to achieve shock absorption and protection.

[0041] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. A bridge project over an operating railway line, comprising a rail bearing base (1) arranged on the bridge and a rail (2) arranged on the rail bearing base (1), characterized in that: The rail bearing base (1) is formed by splicing more than two splicing units, wherein the splicing units include a support column (11), a fixing member (12), a support frame (13), a concrete filling layer (14) and a track plate (15); a casting trough (131) is arranged at the top of the support frame (13); a plug hole (132) is arranged at the bottom of the casting trough (131); the bottom end of the support column (11) is fixed on the bridge; the top end of the support column (11) is plugged into the plug hole (132); a fixing member (12) is arranged at the top end of the support column (11); a concrete filling layer (14) is arranged between the fixing member (12) and the inner side wall of the plug hole (132); the fixing member (12) includes a reinforced steel pipe (121), a reinforced steel bar (122), a sliding rod (123), a knocking seat (124), a connecting rod (125), a connecting rod (126), a connecting rod (127), a connecting rod (128), a connecting rod (129), a connecting rod (130), a connecting rod (131), a connecting rod (132), a connecting rod (133), a connecting rod (134), a connecting rod (135), a connecting rod (136), a connecting rod (137), a connecting rod (138), a connecting rod (139), a connecting rod (140), a connecting rod (141), a connecting rod (142), a connecting rod (143), a connecting rod (144), a connecting rod (145), a connecting rod (146), a connecting rod (147), a connecting rod (148), a connecting rod (149), a connecting rod (149), a connecting rod (141), a connecting rod (142), a connecting rod (143), a connecting rod (144), a connecting rod (145), a connecting rod (146), a connecting rod (1 A connecting rib (125) and a collar (126), the bottom end of the reinforcing steel pipe (121) is embedded in the top center of the support column (11), more than two reinforcing steel bars (122) are evenly arranged around the reinforcing steel pipe (121), and the bottom end of the reinforcing steel bar (122) is embedded in the top of the support column (11), the bottom end of the sliding rod (123) is inserted into the reinforcing steel pipe (121), the top end of the sliding rod (123) is connected to a striking seat (124), the reinforcing steel bar (122) is sleeved with a collar (126), one end of the connecting rib (125) is hinged to the striking seat (124), and the other end of the connecting rib (125) is hinged to the collar (126), and a track plate (15) is arranged on the top of the support frame (13), and two parallel steel rails (2) are fixedly arranged on the track plate (15); The outer side of the reinforcing steel pipe (121) is also sleeved with a reinforcing ring (127), and the reinforcing ring (127) is evenly provided with more than two positioning holes (128), the reinforcing steel bars (122) are plugged into and matched with the positioning holes (128), and the number of the positioning holes (128) and the number of the reinforcing steel bars (122) are equal and correspond one to one.

2. A bridge project over an operating railway according to claim 1, characterized in that: Positioning nuts (129) are coaxially arranged on both upper and lower sides of the positioning hole (128), and the positioning nuts (129) are threadedly connected to the reinforcing steel bar (122).

3. The bridge project over an operating railway according to claim 1, characterized in that: The inner bottom wall of the casting trough (131) is further provided with more than two grooves (133), the side wall of the casting trough (131) is provided with a clamping groove (134) connected to the groove (133), and the collar (126) is plug-fitted with the clamping groove (134).

4. The bridge project over an operating railway according to claim 1, characterized in that: A vulcanized rubber cushion layer (16) is provided in the gap between two adjacent track plates (15).

5. The bridge project over an operating railway according to claim 1, characterized in that: T-shaped grooves (135) are also provided at both ends of the support frame (13), and the T-shaped grooves (135) on two adjacent support frames (13) are aligned to form an I-shaped groove, an I-shaped steel (17) is provided in the I-shaped groove to connect the two adjacent support frames (13), and a buffer layer (18) is provided in the gap between the I-shaped steel (17) and the inner wall of the I-shaped groove.

6. A method for constructing a bridge project over an operating railway line based on any one of claims 1 to 5, characterized in that: The steps include: Step 1: Construction preparation: clean the bridge deck; Step 2, constructing the track bearing base (1): pre-cast two rows of support columns (11) on the bridge, and fix the fixing parts (12) on the top of the support columns (11); hoist the prefabricated support frame (13) above the support columns (11), and align the sockets (132) on the support frame (13) with the support columns (11); lower the support frame (13) so that the top of the support column (11) is inserted into the sockets (132), and ensure that the upper part of the fixing parts (12) extends above the support frame (13); cast a concrete filling layer (14) into the sockets (132), and connect the support columns (11) and the support frame (13) as a whole; fix the prefabricated track plate (15) on the support frame (13); Step 3: constructing the steel rails (2): placing two steel rails (2) in parallel on the track plate (15), and connecting and fixing the steel rails (2) and the track plate (15) via a fastener assembly.

7. A method for constructing a bridge project over an operating railway line according to claim 6, characterized in that: In step 2, before pouring the concrete filling layer (14), the positioning nut (129) is first rotated to adjust the position of the reinforcement ring (127), and the top surface of the positioning nut (129) located above the reinforcement ring (127) is flush with the inner bottom surface of the groove (133), and then the knocking seat (124) is knocked to move it downward, thereby bending the reinforcing steel bar (122) through the action of the connecting bar (125) and the ring (126). After the upper part of the reinforcing steel bar (122) is bent, it will be inserted into the groove (133), and when the connecting bar (125) is rotated to a horizontal state, the end of the ring (126) will be inserted into the slot (134), so as to fix the free end of the reinforcing steel bar (122).

8. The method for constructing a bridge project over an operating railway line according to claim 7, characterized in that: In step 2, after the track plates (15) are installed, a vulcanized rubber cushion layer (16) is arranged in the gap between adjacent track plates (15) to achieve shock absorption and protection.

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