Rail transit bridge deck closed sound barrier mounting structure

Abstract

The utility model discloses rail transit bridge engineering field, specifically discloses a kind of closed sound barrier mounting structure of existing rail transit bridge deck, including the multiple sound barrier column foundation being set apart in the approach bridge flange plate edge place in line direction and the bridge deck reinforcing layer being set up and extending in bridge deck inside in the approach bridge flange plate edge place above bridge deck along;Sound barrier column foundation upper end surface is embedded with embedded steel plate, and several vertical downward vertical orifices are opened in the vertical orifice from embedded steel plate upper end to bridge flange plate lower end, and bridge flange plate bottom surface is provided with lower anchoring steel plate, and lower anchoring steel plate is provided with mounting hole on it;Through the vertical orifice of embedded steel plate, sound barrier column foundation, bridge flange plate and the mounting hole of lower anchoring steel plate by high-strength bolt, sound barrier column foundation and bridge flange plate are connected together to form structural whole.The utility model can install closed sound barrier in existing rail transit bridge deck later period, and it is simple, reasonable in structure, and widely applicable.

Description

Technical Field

[0001] This utility model relates to the field of rail transit bridge engineering, and in particular to a closed sound barrier installation structure for existing rail transit bridge decks, which is applicable to bridge sections where the original bridge deck has not been equipped with a closed sound barrier and where no installation conditions have been reserved. Background Technology

[0002] Enclosed sound barriers on rail transit bridge decks offer excellent sound insulation and noise reduction, but they suffer from drawbacks such as high structural weight and large bending moments at the base of the columns caused by lateral wind forces. For rail transit systems already in operation, if enclosed sound barriers are not installed on the bridge deck, it is generally impossible to add them on elevated bridge decks unless installation conditions were pre-planned during the design and construction phase. Due to the limitations of rail transit clearance, enclosed sound barrier structures are typically 5-8 meters high, resulting in enormous lateral bending moments at the base of the barrier columns under wind loads. For cases where enclosed sound barriers are added on elevated bridge decks, commonly used post-anchoring technologies such as expansion bolts, chemical anchors, and rebar installation suffer from insufficient pull-out resistance, inadequate durability, and poor fatigue resistance, failing to meet the requirements for a safe and reliable connection between the base of the sound barrier columns and the existing bridge deck. Furthermore, the enormous bending moments generated at the base of the sound barrier columns by wind loads cannot meet the strength requirements for the installation of enclosed sound barriers unless the bridge flanges and top plates are specifically reinforced beforehand. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a closed sound barrier installation structure for existing rail transit bridge decks, which solves the problems of heavy self-weight, large bending moment at the column base, and the inability of existing beam structures to meet the stress requirements of closed sound barriers. It can serve as a remedial measure for sound insulation and noise reduction of rail transit bridge decks to meet the increasing environmental protection requirements of residents along the line. At the same time, the structure of this utility model can be applied to rail transit bridges with various beam types, cross-sectional forms, and construction methods, and its application prospects are very broad.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a closed sound barrier installation structure for existing rail transit bridge decks, comprising multiple sound barrier column foundations spaced apart along the line direction near the edge of the bridge flange and a bridge deck reinforcement layer extending from the edge of the bridge flange towards the inner side of the bridge deck above the bridge deck.

[0005] The upper surface of the base of the sound barrier column is pre-embedded with a steel plate. Several vertical openings are made through the upper surface of the pre-embedded steel plate to the lower surface of the bridge flange plate. The bottom surface of the bridge flange plate is provided with a lower anchoring steel plate. The lower anchoring steel plate is provided with mounting holes that match the number of vertical openings.

[0006] The sound barrier column foundation and the bridge flange are connected together to form a structural whole by passing high-strength bolts through the pre-embedded steel plate, the vertical opening of the sound barrier column foundation, the bridge flange plate, and the installation hole of the lower anchoring steel plate.

[0007] Optionally, the foundation of each of the sound barrier columns is a reinforced concrete foundation, with a length of 60 to 100 cm along the route, a width of 40 to 60 cm along the direction perpendicular to the route, and a height of not less than 40 cm.

[0008] Furthermore, the distance between the foundations of the two sound barrier columns is 2m.

[0009] Optionally, the bridge deck reinforcement layer has a thickness of 10-20cm and a width of not less than 1m.

[0010] Furthermore, the bridge deck reinforcement layer is provided with several reinforcing steel bars, which extend into the foundation of the sound barrier columns.

[0011] Optionally, a steel base plate is fixed to the bottom of the enclosed sound barrier column. The planar dimensions and bolt hole positions of the steel base plate are the same as those of the pre-embedded steel plate. The enclosed sound barrier column and the steel base plate are fixed together to the sound barrier column foundation by the high-strength bolts. The enclosed sound barrier is installed on the enclosed sound barrier column.

[0012] Furthermore, each of the aforementioned sound barrier pillars has eight vertical openings on its base, divided into four groups of two, with each group having two openings arranged in a straight line along the route, close to the four corners of the pre-embedded steel plate.

[0013] Optionally, the lower anchoring steel plate is disposed close to the bottom surface of the bridge flange plate and is adapted to the shape of the bridge flange plate.

[0014] Furthermore, the thickness of the lower anchoring steel plate is not less than 20mm.

[0015] Preferably, the bridge deck reinforcement layer is poured together with the foundation of the sound barrier column.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] 1. Enclosed sound barriers can be retrofitted onto existing rail transit bridge decks. The structure is simple, reasonable, and widely applicable. It can be used on various types of concrete bridge structures for rail transit (or urban rail transit), including simply supported beams, continuous beams, and various cross-sectional forms such as box girders and T-beams, and is not limited to beam construction methods.

[0018] 2. Vertical holes are made in the existing bridge flange plate, high-strength bolts are passed through the bridge flange plate structure, and the foundation of the post-cast sound barrier column is integrated with the bridge flange plate by setting the lower anchor steel plate. This meets the installation conditions and stress requirements of the closed sound barrier column, and its durability and fatigue resistance are far superior to various post-implanted bolt types.

[0019] 3. A bridge deck reinforcement layer of a certain thickness and width is set on the bridge deck. The bridge deck reinforcement layer and the reinforcing steel bars inside it can improve the stiffness and bending strength of the existing bridge flange plate, and together with the bridge flange plate, bear the additional load generated by the enclosed sound barrier. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is an elevation view of the installation structure of this utility model;

[0022] Figure 2 This is a plan view of the installation structure of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Bridge flange plate; 2. Sound barrier column foundation; 3. Bridge deck reinforcement layer; 4. Reinforcing steel bars; 5. Embedded steel plate; 6. Vertical opening; 7. Lower anchoring steel plate; 8. High-strength bolts; 9. Enclosed sound barrier column. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0026] An enclosed sound barrier installation structure for existing rail transit bridge decks, such as Figure 1 , Figure 2As shown, the structure includes multiple sound barrier column foundations 2 spaced along the route near the edge of the bridge flange 1, and a bridge deck reinforcement layer 3 extending inward from the edge of the bridge flange 1 above the bridge deck. Several reinforcing steel bars 4 are arranged within the bridge deck reinforcement layer 3, extending into the sound barrier column foundations 2. An embedded steel plate 5 is pre-embedded on the upper surface of the sound barrier column foundation 2, and several vertically downward openings 6 are drilled through it from the upper end of the embedded steel plate 5 to the lower end of the bridge flange 1. A lower anchoring steel plate 7 is provided on the bottom surface of the bridge flange 1, and mounting holes matching the number of vertical openings 6 are provided on the lower anchoring steel plate 7. High-strength bolts 8 pass through the embedded steel plate. 5. The vertical openings 6 of the sound barrier column foundation 2 and the bridge flange plate 1, as well as the installation holes of the lower anchoring steel plate 7, connect the sound barrier column foundation 2 and the bridge flange plate 3 to form a structural whole. The sound barrier column foundation 2, the bridge deck reinforcement layer 3 and the internal reinforcing steel bars 4 can improve the stiffness and bending strength of the existing bridge flange plate 1, and share the additional load generated by the closed sound barrier with the bridge flange plate 1, thereby meeting the installation conditions and stress requirements of the closed sound barrier column 9. Its durability and fatigue resistance are far superior to various post-implanted bolt types, solving the problems of the large self-weight of the closed sound barrier, the large bending moment at the column base, and the inability of the existing beam structure to meet the stress requirements.

[0027] In this invention, the sound barrier column foundation 2 is a reinforced concrete foundation. Its dimensions are determined by structural calculations and the construction requirements for the installation of the enclosed sound barrier column. The length (along the road direction) is typically between 60 and 100 cm, the width (perpendicular to the road direction) is typically between 40 and 60 cm, and the height is generally not less than 40 cm. The distance between two sound barrier column foundations 2 is generally 2 m.

[0028] In this utility model, the thickness of the bridge deck reinforcement layer 3 is determined by calculation. According to structural requirements, it is usually not less than 10cm, and preferably 10-20cm. The width of the bridge deck reinforcement layer 3 is determined by calculation in combination with the actual situation of the specific bridge flange plate 1, and is usually not less than 1m.

[0029] In this invention, the bottom of the enclosed sound barrier column 9 is welded with a steel base plate. The planar dimensions and bolt hole positions of the steel base plate are the same as those of the pre-embedded steel plate 5. The enclosed sound barrier column 9 and the steel base plate are fixed together to the sound barrier column foundation 2 using high-strength bolts 8. The enclosed sound barrier is installed on the enclosed sound barrier column 9. Preferably, each sound barrier column foundation 2 is provided with 8 vertical openings 6, divided into four groups, with 2 openings in each group arranged in a straight line along the route, close to the four corners of the pre-embedded steel plate 5. The vertical openings 6 need to be grouted.

[0030] In this utility model, the lower anchoring steel plate 7 is set close to the bottom surface of the bridge flange plate 1 and is adapted to the shape of the bridge flange plate 1. The thickness of the lower anchoring steel plate 7 is not less than 20mm.

[0031] In this utility model, the bridge deck reinforcement layer 3 is made of fine stone concrete or UPHC high-performance concrete. Before pouring the bridge deck reinforcement layer 3, the bridge deck concrete should be roughened and cleaned, and it should be poured together with the sound barrier column foundation 2.

[0032] The embodiments described in this specification are merely examples of implementations of the inventive concept. The scope of protection of this utility model should not be considered as limited to the specific forms described in the embodiments. The scope of protection of this utility model also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A closed-type sound barrier installation structure for existing rail transit bridge decks, characterized in that, This includes multiple sound barrier column foundations spaced at intervals along the route near the edge of the bridge flange, and a bridge deck reinforcement layer extending from the edge of the bridge flange toward the inner side of the bridge deck above the bridge deck. The upper surface of the base of the sound barrier column is pre-embedded with a steel plate. Several vertical openings are made through the upper surface of the pre-embedded steel plate to the lower surface of the bridge flange plate. The bottom surface of the bridge flange plate is provided with a lower anchoring steel plate. The lower anchoring steel plate is provided with mounting holes that match the number of vertical openings. The sound barrier column foundation and the bridge flange are connected together to form a structural whole by passing high-strength bolts through the pre-embedded steel plate, the vertical opening of the sound barrier column foundation, the bridge flange plate, and the installation hole of the lower anchoring steel plate.

2. The enclosed sound barrier installation structure for existing rail transit bridge decks according to claim 1, characterized in that, Each of the aforementioned sound barrier columns has a reinforced concrete foundation, with a length of 60 to 100 cm along the route, a width of 40 to 60 cm perpendicular to the route, and a height of not less than 40 cm.

3. The enclosed sound barrier installation structure for existing rail transit bridge decks according to claim 2, characterized in that, The distance between the foundations of the two sound barrier columns is 2m.

4. The enclosed sound barrier installation structure for existing rail transit bridge decks according to claim 1, characterized in that, The bridge deck reinforcement layer has a thickness of 10-20cm and a width of not less than 1m.

5. The enclosed sound barrier installation structure for existing rail transit bridge decks according to claim 4, characterized in that, The bridge deck reinforcement layer contains several reinforcing steel bars, which extend into the foundation of the sound barrier columns.

6. The enclosed sound barrier installation structure for existing rail transit bridge decks according to claim 1, characterized in that, The bottom of the enclosed sound barrier column is fixed with a column steel base plate. The planar dimensions and bolt hole positions of the column steel base plate are the same as those of the pre-embedded steel plate. The enclosed sound barrier column and the column steel base plate are fixed together to the sound barrier column foundation by the high-strength bolts. The enclosed sound barrier is installed on the enclosed sound barrier column.

7. The enclosed sound barrier installation structure for existing rail transit bridge decks according to claim 6, characterized in that, Each of the aforementioned sound barrier columns has 8 vertical openings on its base, divided into four groups of 2 openings each, arranged in a straight line along the route and close to the four corners of the pre-embedded steel plate.

8. The enclosed sound barrier installation structure for existing rail transit bridge decks according to claim 1, characterized in that, The lower anchoring steel plate is installed close to the bottom surface of the bridge flange plate and is adapted to the shape of the bridge flange plate.

9. The enclosed sound barrier installation structure for existing rail transit bridge decks according to claim 8, characterized in that, The thickness of the lower anchoring steel plate shall not be less than 20mm.

10. The enclosed sound barrier installation structure for existing rail transit bridge decks according to claim 1, characterized in that, The bridge deck reinforcement layer was poured together with the foundation of the sound barrier columns.

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