A protective sleeve for pre-embedded sleeves on ballastless track bridge deck

Abstract

This utility model discloses a protective device for embedded sleeves in ballastless track bridge decks, relating to the field of high-speed railway engineering. It aims to solve the problem that existing embedded sleeves do not provide effective protection, making it difficult to ensure that the embedded sleeves are not damaged during milling of the beam surface. The key technical points are: it includes anchoring steel bars and a sleeve body connected to the anchoring steel bars. The sleeve body has internal threads, and the anchoring steel bars have external threads adapted to the internal threads. Bolts, made of plastic, are threadedly connected to the sleeve body. This utility model's protective device for embedded sleeves in ballastless track bridge decks, after the sleeve body is installed, prevents cement slurry from entering the sleeve body during concrete pouring and prevents damage to the sleeve body during milling of the beam surface. This ensures that the sleeve body can be smoothly installed with anchoring steel bars and connected to the base plate later.

Description

Technical Field

[0001] This utility model relates to the field of high-speed railway engineering, and more specifically, it relates to a protective device for pre-embedded sleeves on ballastless track bridge decks. Background Technology

[0002] Currently, my country's high-speed railways mainly use CRTSⅢ type slab track bed. The accuracy of the elevation of the pre-embedded sleeves during bridge construction and the effective protection of the pre-embedded sleeves determine the convenience and speed of the subsequent base plate construction, which is an important factor affecting the construction quality and speed of the base plate.

[0003] The existing beam surface is connected to the later-constructed base slab concrete by tightening upper and lower anchoring steel bars within multiple sleeves to resist shear stress. During the erection of the precast beam, heavy-duty equipment such as bridge erecting machines will pass over the beam surface. Therefore, the upper anchoring steel bars should be installed after the beam erection is completed and the base slab is constructed. The existing embedded sleeve protective sleeves do not provide protection for the bolt holes. On the one hand, dust can easily enter during milling and roughening of the beam surface, affecting the installation of the upper anchoring steel bars. On the other hand, due to errors in the installation elevation of the embedded sleeves, they are easily damaged during milling. If the embedded sleeves are damaged, rebar installation is required for repair. When drilling holes for side rebar installation, prestressing tendons may be drilled, thus affecting the bridge's stress.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a protective device for pre-embedded sleeves on ballastless track bridge decks. After the sleeve body is installed, it can prevent cement slurry from entering the sleeve body during the pouring of concrete for the beam by using bolts, and can also prevent damage to the sleeve body when the beam surface is milled and roughened, thereby ensuring that the sleeve body can be smoothly installed with anchor bars and connected to the base plate in the later stage.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a protective device for pre-embedded sleeves on ballastless track bridge deck, comprising anchoring steel bars and sleeve bodies connected to the anchoring steel bars, wherein the sleeve body is provided with internal threads, the anchoring steel bars are provided with external threads adapted to the internal threads, and bolts are threadedly connected to the sleeve body, wherein the bolts are made of plastic.

[0007] The present invention is further configured such that: a bushing is externally fixed to the bolt, and the bushing is made of silicone.

[0008] The present invention is further configured such that a protective cap is detachably connected to the upper side of the bolt and the bushing, and the protective cap is made of plastic.

[0009] The present invention is further configured such that a slot is formed on the bolt.

[0010] The present invention is further configured such that: the outer wall of the sleeve body is fixedly connected with a first reinforcing rib and several second reinforcing ribs.

[0011] The present invention is further configured such that: the sleeve body is made of 45# high-quality carbon steel, and the outer surface of the sleeve body is electroplated with a zinc layer.

[0012] In summary, this utility model has the following beneficial effects: after the sleeve body is installed, the bolts can prevent cement slurry from entering the sleeve body during the pouring of concrete for the beam, and can prevent the sleeve body from being damaged when the beam surface is milled and roughened, thereby ensuring that the sleeve body can be smoothly installed with anchor bars and connected to the base plate in the later stage. The bolts can also be protected by bushings and protective caps. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 A cross-sectional view of this utility model Figure 1 ;

[0015] Figure 3 A cross-sectional view of this utility model Figure 2 ;

[0016] Figure 4 This is an exploded view of the present invention.

[0017] In the diagram: 1. Anchoring steel bar; 2. Sleeve body; 3. Internal thread; 4. External thread; 5. Bolt; 6. Bushing; 7. Protective cap; 8. Slotted groove; 9. Reinforcing rib one; 10. Reinforcing rib two. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] A protective sleeve for pre-embedded sleeves on ballastless track bridge decks, such as Figures 1-4 As shown, the device includes an anchoring rebar 1 and a sleeve body 2 connected to the anchoring rebar 1. The sleeve body 2 has an internal thread 3, and the anchoring rebar 1 has an external thread 4 that matches the internal thread 3. A bolt 5 is threaded onto the sleeve body 2. The bolt 5 is made of plastic. In use, the sleeve body 2 can be tightened to the anchoring rebar 1 first, and then the sleeve body 2 and the anchoring rebar 1 can be welded and fixed to the beam body. Then the bolt 5 is screwed into the sleeve body 2. This can prevent cement slurry from entering the sleeve body 2 when the concrete is poured, thus ensuring that the sleeve body 2 can be used normally in the later stage. The bolt 5 will occupy 10mm of elevation, ensuring that the sleeve body 2 will not be damaged when the beam surface is milled under the condition of installation elevation error.

[0020] like Figures 1-4 As shown, the bolt 5 is externally fixed with a bushing 6, which is made of silicone to ensure that no concrete sticks to the outside of the bolt 5, making it easy to unscrew the bolt 5 later.

[0021] like Figures 1-4 As shown, a protective cap 7 is detachably connected to the upper side of the bolt 5 and the bushing 6. The protective cap 7 is made of plastic, which can prevent concrete from sticking around the bushing 6, so that the bushing 6 can be easily removed later when it is not completely milled off.

[0022] like Figures 2-4 As shown, a slot 8 is provided on the bolt 5, which makes it easy to remove the bolt 5 later with a flathead screwdriver.

[0023] like Figures 1-3 As shown, the outer wall of the sleeve body 2 is fixedly connected with reinforcing rib 1 9 and several reinforcing ribs 2 10, which can strengthen the sleeve body 2 and improve its own strength.

[0024] like Figures 1-3 As shown, the sleeve body 2 is made of high-quality carbon steel No. 45. The outer surface of the sleeve body 2 is electroplated with zinc to prevent damage and corrosion during transportation, loading and unloading and stacking.

[0025] Working principle: When embedding the sleeve body 2, first tighten the sleeve body 2 and the anchoring steel bar 1 together and fix them on the beam steel bar. Then, install the protective cap 7 on the upper side of the bushing 6. Then screw the bolt 5, bushing 6 and protective cap 7 together into the sleeve body 2. After the connection is completed, the combination of bolt 5, bushing 6 and protective cap 7 can be rotated to adjust the elevation, ensuring that the top surface of the protective cap 7 is accurately 10mm lower than the beam surface. Then the beam concrete can be poured.

[0026] During the later construction of the ballastless track base plate, the workers will mill the beam surface within a range of 1.35m on both sides of the track center line, and the milling depth will be no less than 10mm and no more than 20mm. At this time, the protective cap 7 will be completely milled off, and the bushing 6 will also be milled. After the milling is completed, the loose material and debris generated during milling will be cleaned up, and then the bolt 5 can be unscrewed with a flathead screwdriver. When unscrewing, if the bushing 6 is not completely milled, the remaining part of the bushing 6 will also be driven out by the bolt 5. In this way, the bushing body 2 can be milled after the sleeve body 2 is installed, thus avoiding damage to the sleeve body 2 and avoiding the need for side reinforcement.

[0027] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A protective device for pre-embedded sleeves on ballastless track bridge decks, comprising anchoring steel bars (1) and sleeve bodies (2) connected to the anchoring steel bars (1), characterized in that: The sleeve body (2) has an internal thread (3), the anchoring steel bar (1) has an external thread (4) that matches the internal thread (3), and the sleeve body (2) is threaded with a bolt (5), which is made of plastic.

2. The ballastless track bridge deck pre-embedded sleeve protection device according to claim 1, characterized in that: The bolt (5) is externally fixedly connected to a bushing (6), which is made of silicone.

3. The ballastless track bridge deck embedded sleeve protection device according to claim 2, characterized in that: The bolt (5) and bushing (6) are detachably connected to a protective cap (7), which is made of plastic.

4. The ballastless track bridge deck embedded sleeve protection device according to claim 3, characterized in that: The bolt (5) has a slot (8) formed on it.

5. The ballastless track bridge deck embedded sleeve protection device according to claim 1, characterized in that: The outer wall of the sleeve body (2) is fixedly connected with reinforcing rib one (9) and several reinforcing rib two (10).

6. The ballastless track bridge deck embedded sleeve protection device according to claim 1, characterized in that: The sleeve body (2) is made of 45 high-quality carbon steel, and the outer surface of the sleeve body (2) is electroplated with a zinc layer.

Images