Existing railway assembly type environment-friendly reinforcing structure and construction method

Abstract

The application discloses an existing railway assembled environment-friendly reinforcing structure and a construction method. The existing railway comprises a continuous bridge deck and a plurality of pier columns arranged at the bottom of the continuous bridge deck. The existing railway assembled environment-friendly reinforcing structure comprises a sound barrier assembly, a supporting system and the like. The sound barrier assembly comprises a sound barrier beam fixedly installed at the side of the continuous bridge deck and arranged along the extension direction of the continuous bridge deck, and a plurality of sound barrier units fixedly installed on the sound barrier beam in a head-to-tail splicing mode. The supporting system comprises a plurality of hoop assemblies fixedly installed at the outer circumferential sides of the plurality of pier columns, and a plurality of corbel assemblies fixedly connected between the sound barrier beam and the plurality of hoop assemblies. The application meets the requirements of railway environment-friendly reinforcing, achieves the purpose of safe and convenient construction, and has high popularization value.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a prefabricated environmentally friendly reinforcement structure and construction method for existing railways suitable for the construction of post-installed sound barriers. Background Technology

[0002] The rapid development of railway construction has greatly facilitated connectivity between cities. However, along with this rapid development, noise pollution has gradually attracted people's attention, and sound barriers are often regarded as one of the effective means of reducing noise.

[0003] For the construction of sound barriers on railway bridges, two main methods are currently used: independent column support systems and post-construction corbel support systems. Statistical analysis and theoretical research show that the construction of independent column support systems is significantly affected by the terrain along the railway line. At locations where the railway bridge is too high, the cross-section of the independent columns needs to be increased to ensure the required height-to-slenderness ratio, leading to greater construction difficulty, longer construction periods, higher costs, and serious impacts on the safe operation of the railway. Post-construction corbel support systems connect to existing railway piers via rebar installation, serving as the lower support structure for the sound barrier. However, post-construction corbel support systems require a large amount of rebar installation, and construction is prone to pier reinforcement breakage. Longitudinal reinforcement breakage causes discontinuity in the force transmission path of the pier, and stirrup breakage affects the lateral constraint of the pier structure, impacting the safe use of the pier. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a prefabricated environmentally friendly reinforcement structure and construction method for existing railways, which meets the requirements for environmentally friendly reinforcement of railways while achieving safe and convenient construction.

[0005] To achieve the above objectives, the present invention provides a prefabricated environmentally friendly reinforcement structure for existing railways. The existing railway includes a continuous bridge deck and multiple piers supported at the bottom of the continuous bridge deck. The prefabricated environmentally friendly reinforcement structure for existing railways includes:

[0006] The sound barrier assembly includes a sound barrier beam fixedly installed on the side of the continuous bridge deck and arranged along the extension direction of the continuous bridge deck, and multiple sound barrier units spliced ​​together on the sound barrier beam.

[0007] The support system includes multiple clamp assemblies that are fixedly installed on the outer periphery of multiple piers, and multiple corbel assemblies that are fixedly connected between the sound barrier beam and the multiple clamp assemblies.

[0008] Preferably, a limiting baffle is fixedly installed on the sound barrier beam at the position corresponding to each of the piers, and the bracket assembly is fixedly connected between the corresponding limiting baffle and the clamp assembly.

[0009] Preferably, the clamp assembly includes two clamp members spaced apart along the axial direction of the pier column, the corbel assembly includes a crossbar fixedly connected to one of the clamp members and arranged along the column direction perpendicular to the pier column, and an oblique brace fixedly connected to the other clamp member and the end of the crossbar facing away from the pier column, and a height adjustment bracket fixedly connected between the crossbar and the sound barrier beam.

[0010] Preferably, a rubber pad is provided between each of the clamps and the pier.

[0011] Preferably, the height adjustment bracket includes two uprights fixedly installed on the crossbar in a vertical direction and a plurality of support rods fixedly connected between the two uprights. A connecting rod is fixedly connected between the ends of the two uprights facing away from the crossbar, and the side of the connecting rod facing away from the two uprights is fixedly connected to the corresponding limiting baffle.

[0012] Preferably, the ratio of the distance between the two clamps to the length of the crossbar is greater than 1.

[0013] Preferably, the clamping member includes two clamping plates that are spliced ​​together, and the two clamping plates are spliced ​​together and fixed by bolts after splicing.

[0014] Preferably, the width of the clamp plate is greater than or equal to √2 times the cross-sectional length of the diagonal brace.

[0015] A prefabricated environmentally friendly reinforcement construction method for existing railways, which achieves environmentally friendly reinforcement of existing railways through the aforementioned prefabricated environmentally friendly reinforcement structure, includes the following steps:

[0016] A clamp assembly is fixedly installed on the outer periphery of each pier column;

[0017] Install the bracket assembly and securely connect it to the clamp assembly;

[0018] Install the sound barrier beam on the side of the corbel assembly that is relatively far from the clamp assembly, and fix the sound barrier beam to the continuous bridge deck.

[0019] Multiple sound barrier units are installed on the barrier beam, and the multiple sound barrier units are spliced ​​together end to end.

[0020] By adopting the above technical solution, the present invention has the following beneficial effects:

[0021] 1) It reduces damage and disturbance to the piers, strengthens the lateral constraints of the piers, and improves the bearing capacity of the piers.

[0022] 2) The construction process is simple and convenient, reducing the investment in temporary land use and related processing plant areas during the construction period.

[0023] 3) By adopting a clamp support system, the time spent working at heights was reduced, thus minimizing the safety impact of construction on railway construction. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the existing railway prefabricated environmentally friendly reinforcement structure in the embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the structure of the clamp component in an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the structure of the cow leg component in an embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram of a sound barrier beam with one structural form in an embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of another structural form of the sound barrier beam in an embodiment of the present invention.

[0030] The correspondence between the numbers in the attached diagram is as follows:

[0031] 11-Continuous bridge deck; 12-Pier column; 21-Sound barrier beam; 211-Precast concrete beam; 212-Steel truss beam; 213-Honeycomb aluminum panel; 22-Sound barrier unit; 24-Limiting baffle; 3-Clamping component; 31-Clamping plate; 32-Rubber pad; 33-Bolt; 4-Corner assembly; 41-Horizontal bar; 42-Diagonal brace; 43-Height adjustment bracket; 431-Upright pole; 432-Connecting rod; 433-Supporting rod. Detailed Implementation

[0032] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] Please see Figures 1 to 5As shown, this embodiment of the invention provides a prefabricated environmentally friendly reinforcement structure for existing railways. The existing railway includes a continuous bridge deck 11 and multiple piers 12 supported at the bottom of the continuous bridge deck 11. The prefabricated environmentally friendly reinforcement structure for existing railways includes a sound barrier assembly and a support system. The sound barrier assembly includes a sound barrier beam 21 fixedly installed on the side of the continuous bridge deck 11 and arranged along the extension direction of the continuous bridge deck 11, and multiple sound barrier units 22 spliced ​​together on the sound barrier beam 21. The support system includes multiple clamp assemblies fixedly installed on the outer periphery of the multiple piers 12, and multiple corbel assemblies 4 fixedly connected between the sound barrier beam 21 and the multiple clamp assemblies.

[0034] Furthermore, in this embodiment, a limiting baffle 24 is fixedly installed on the sound barrier beam 21 at the position corresponding to each pier 12, and the bracket assembly 4 is fixedly connected between the corresponding limiting baffle 24 and the clamp assembly. Preferably, the clamp assembly has two clamp members 3 spaced apart along the axial direction of the pier 12, and each clamp member 3 is provided with a rubber pad 32 between itself and the pier 12. It should be noted that in this embodiment, the sound barrier beam 21 can be either a precast concrete beam 211 or a steel truss beam (Bailey beam) 212. When a precast concrete beam 211 is used, transverse limiting baffles 24 should be set on both sides of the top crossbeam of the portal frame according to the width of the concrete beam. The crossbeam and the lower I-beam (i.e., the beam of the continuous bridge deck) are connected and fixed with pre-embedded bolts. When a steel truss beam 212 is used, limiting baffles 24 are set according to the width of the steel truss beam 212. The steel truss beam 212 and the lower I-beam (i.e., the beam of the continuous bridge deck) are connected and fixed with pre-embedded bolts. Considering the influence of the metal of the steel truss beam 212 on noise reduction, a 3cm thick honeycomb aluminum plate 213 is used as a metal noise reduction measure on the upper part of the steel truss beam 212.

[0035] Furthermore, in this embodiment, the clamping member 3 includes two clamping pieces 31 spliced ​​together. The two clamping pieces 31 are spliced ​​together and fixed after splicing by bolts 33. The clamping pieces 31 are processed according to the specifications of the pier column 12, and the two clamping pieces 31 are arranged in a mirror image.

[0036] Please see Figure 2 and Figure 3As shown, the corbel assembly 4 includes a horizontal bar 41 fixedly connected to one of the clamping members 3 and arranged perpendicular to the column body of the pier 12, and a diagonal brace 42 fixedly connected obliquely between the other clamping member 3 and the end of the horizontal bar 41 facing away from the pier 12. A height adjustment bracket 43 is fixedly connected between the horizontal bar 41 and the sound barrier beam 21. Preferably, the height adjustment bracket 43 includes two vertical poles 431 fixedly installed on the horizontal bar 41 in the vertical direction and a plurality of support rods 433 fixedly connected between the two vertical poles 431. A connecting rod 432 is fixedly connected between the ends of the two vertical poles 431 facing away from the horizontal bar 41, and the side of the connecting rod 432 facing away from the two vertical poles 431 is fixedly connected to the corresponding limiting baffle 24. It should be noted that in this embodiment, the horizontal bar 41 and the diagonal brace 42 are made of double H-beams with the same cross-sectional specifications and are connected to the clamping member 3 and the horizontal bar 41 by welding.

[0037] Furthermore, the height adjustment bracket 43 is installed using a portal steel frame, the upright 431 is made of steel round tube, the connecting rod 432 is made of I-beam embedded in the top of the upright 431, and the support rod 433 is set to ensure the integrity of the two uprights 431. The support rod 433 is set along one of the two horizontal lines and one of the horizontal lines. The connection between the rods is made by welding.

[0038] Furthermore, the distance between the two clamps 3 is determined based on the cantilever length of the corbel assembly 4. According to the stress stability study, the ratio of the distance between the upper and lower clamps 3 to the cantilever length of the steel corbel (i.e., the length of the crossbar 41) must be greater than 1. The width of the clamp plate 31 is determined based on the cross-sectional dimensions of the diagonal brace 42 and the crossbar 41, as well as the dynamic load of the sound barrier. The width of the clamp plate 31 is greater than or equal to √2 times the cross-sectional length of the diagonal brace 42. The rubber pads are arranged according to the position of the clamps, and the width of the rubber pads is determined based on the width of the clamps. The rubber pads must be set flat and there should be no large misalignment.

[0039] A prefabricated environmentally friendly reinforcement construction method for existing railways, which achieves environmentally friendly reinforcement of existing railways through the aforementioned prefabricated environmentally friendly reinforcement structure, includes the following steps:

[0040] The rubber pads are positioned and fixed in advance at the location where the clamp assembly is to be installed, and the clamp assembly is lifted to the required installation location using lifting machinery, thereby fixing the clamp assembly on the outer periphery of each pier column.

[0041] The various connecting rods in the bracket assembly are assembled and treated with anti-corrosion measures on the available site. After completion, a truck crane is used to lift the entire assembly during the off-season to install the bracket assembly and fix it to the clamp assembly.

[0042] A crane is used to install the sound barrier beam on the side of the corbel assembly that is relatively far from the clamp assembly. The sound barrier beam is then fixedly connected to the continuous bridge deck, and a limit baffle is installed at the corresponding position on the sound barrier beam.

[0043] During the gap period, multiple sound barrier units are installed on the barrier beam, and the multiple sound barrier units are spliced ​​together end to end.

[0044] It should be noted that the working principle of this invention includes: considering that the pier structure is generally of the variable cross-section type, taking advantage of the characteristic that the lower cross-section of the pier is larger than the upper cross-section, this support system is used to transfer the load generated by the sound barrier to the clamp assembly through the steel bracket assembly, and then to the pier through the friction between the clamp assembly and the pier, and finally to the foundation. At the same time, the clamp assembly can increase the lateral restraint of the existing railway pier, thus strengthening the existing railway pier.

[0045] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. An environmentally friendly reinforcing structure for an existing railway, the existing railway comprising a continuous deck and a plurality of piers disposed at the bottom of the continuous deck, characterized in that, The existing railway assembly type environment-friendly reinforcing structure comprises: A sound barrier assembly comprising a sound barrier beam fixedly installed on the side of the continuous bridge deck and arranged along the extension direction of the continuous bridge deck, and a plurality of sound barrier units fixedly installed on the sound barrier beam in a head-to-tail splicing manner; A support system comprising a plurality of hoop assemblies fixedly installed on the outer circumferential side of the plurality of pier columns respectively, and a plurality of corbel assemblies fixedly connected between the sound barrier beam and the plurality of hoop assemblies respectively.

2. The prefabricated environment-friendly reinforcing structure for existing railway according to claim 1, characterized in that: A limiting baffle is fixedly installed on the sound barrier beam at a position corresponding to each of the pier columns, and the corbel assembly is fixedly connected between the corresponding limiting baffle and the hoop assembly.

3. The prefabricated environment-friendly reinforcing structure for existing railway according to claim 2, characterized in that: The hoop assembly comprises two hoop pieces arranged at intervals along the axial direction of the pier column, the corbel assembly comprises a horizontal rod fixedly connected to one of the hoop pieces and arranged along a direction perpendicular to the column body of the pier column, and a diagonal bracing rod fixedly connected between the other hoop piece and the end of the horizontal rod opposite to the side of the pier column, and an elevation adjusting bracket is fixedly connected between the horizontal rod and the sound barrier beam.

4. The prefabricated environment-friendly reinforcing structure for existing railway according to claim 3, characterized in that: A rubber pad is arranged between each of the hoop pieces and the pier column.

5. The prefabricated environment-friendly reinforcing structure for existing railway according to claim 3, characterized in that: The elevation adjusting bracket comprises two vertical rods fixedly installed on the horizontal rod in a vertical direction, and a plurality of support rods fixedly connected between the two vertical rods, a connecting rod is fixedly connected between the ends of the two vertical rods opposite to the side of the horizontal rod, and the connecting rod is fixedly connected to the corresponding limiting baffle on the side opposite to the two vertical rods.

6. The prefabricated environment-friendly reinforcing structure for existing railway according to claim 5, characterized in that: The ratio of the spacing between the two hoop pieces to the length of the horizontal rod is greater than 1.

7. The prefabricated environment-friendly reinforcing structure for existing railway according to claim 5, characterized in that: The hoop piece comprises two hoop pieces spliced with each other and fixed by bolts after splicing.

8. The prefabricated environment-friendly reinforcing structure for existing railway according to claim 7, characterized in that: The width of the hoop piece is greater than or equal to √2 times the length of the cross section of the diagonal bracing rod.

9. A method for assembling an environmental protection reinforcing construction for an existing railway, characterized in that, The existing railway assembly type environment-friendly reinforcing structure as claimed in claim 1 is used to realize the environment-friendly reinforcing of the existing railway, and the construction method comprises the following steps: Fixing a hoop assembly on the outer circumferential side of each pier column; Fixing a corbel assembly and connecting the corbel assembly and the hoop assembly; Fixing a sound barrier beam on the side of the corbel assembly away from the hoop assembly, and connecting the sound barrier beam and the continuous bridge deck; Fixing a plurality of sound barrier units on the sound barrier beam in a head-to-tail splicing manner.

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