Tunnel section ballastless track embedded steel bar drawing detection device

Abstract

The utility model discloses a tunnel section ballastless track embedded steel bar drawing detection device, which belongs to the technical field of concrete leakage embedded steel bar drawing force detection, and comprises a reaction frame, a support plate fixed at the top of the reaction frame, and a drawing instrument fixed at the geometric center position of the top plate surface of the support plate, the counter-force frame is provided with a first opening and a second opening which are used for penetration of an embedded steel bar, the first opening is located at the bottom of the counter-force frame, the second opening is located on the side face of the counter-force frame, and a suspension supporting beam is arranged between the first opening and the second opening. By means of the scheme, the device is simple in structure, easy to manufacture, easy to operate and convenient to carry.

Description

Technical Field

[0001] This utility model belongs to the field of concrete exposed rebar pull-out force detection technology, and provides a simple, easy-to-manufacture, easy-to-operate and easy-to-carry rebar pull-out detection device for ballastless track in tunnel sections. Background Technology

[0002] In the CRTS twin-block ballastless track tunnel section, the design involves drilling holes for rebar installation on the invert arch infill surface. Before drilling and installation, a rebar detector is used to check for the presence of structural rebar at the installation location. Holes with a diameter of 25mm and a depth of 255mm are drilled perpendicular to the track direction. After drilling, the holes are cleaned and dust is removed, followed by the injection of Grade A rebar adhesive. A 20mm diameter "L"-shaped HRB400 hot-rolled ribbed rebar is inserted using a continuous rotating motion to a depth of 250mm. The L-shaped rebar must not be rotated until it has fully hardened after installation.

[0003] According to the specifications, pull-out force tests should be conducted on the rebar to ensure the effectiveness of the rebar installation. The number of samples for the pull-out test should be one per thousand, but not less than three, in accordance with Article 2.2 of Appendix A of the Technical Specification for Post-Anchoring of Concrete Structures (JGJ145-2004).

[0004] The external exposed rebar pull-out force detection device disclosed in Chinese Patent 2022229971649 has a complex structure, which makes it costly to manufacture, complicated to operate, and difficult to carry. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a rebar pull-out detection device for ballastless track in tunnel sections, which aims to solve the existing technical problems of high manufacturing cost, complicated operation and inconvenience in carrying.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a rebar pull-out detection device for ballastless track in tunnel sections, comprising: a reaction frame, a support plate fixed to the top of the reaction frame, and a pull-out device fixed at the geometric center of the top surface of the support plate. The reaction frame has a first opening and a second opening for the rebar to pass through. The first opening is located at the bottom of the reaction frame, and the second opening is located on the side of the reaction frame. A suspension support beam is provided between the first opening and the second opening.

[0008] To facilitate the manufacture of the reaction frame, the above scheme further includes: the reaction frame is a rectangular frame structure, which includes four suspension support beams and four vertical support columns;

[0009] The four suspension support beams are welded together to form a lower rectangular frame. The lower ends of the four vertical support columns are welded to the four corners of the lower rectangular frame, and the top of the vertical support columns is welded together with the bottom surface of the support plate.

[0010] To further reduce manufacturing costs, in the above solution, the suspension support beam and the vertical support column are both made of angle steel.

[0011] The beneficial effects of this utility model are:

[0012] With a simple and easy-to-manufacture structure, stable construction, and convenient portability and on-site operation, this device offers high testing efficiency, is reusable, and reduces testing costs. It has a wide range of applications, not only suitable for pull-out testing of ballastless track reinforcement in tunnel sections, but also applicable to roadbed anchor pull-out force testing and other similar scenarios.

[0013] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model in use;

[0017] Reference numerals in the attached drawings: 1. Reaction frame; 2. Support plate; 3. Pull-out device; 4. First opening; 5. Second opening; 6. Suspension support beam; 7. Vertical support column; 8. Operating handle; 9. Rebar. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Where there is no conflict, the following embodiments and features can be combined with each other.

[0019] Furthermore, the reference numbers and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0020] like Figures 1 to 2 As shown, this utility model discloses a rebar pull-out testing device for ballastless track in tunnel sections, comprising: a reaction frame 1, a support plate 2 fixed to the top of the reaction frame 1, and a pull-out device 3 fixed at the geometric center of the top surface of the support plate 2. The reaction frame 1 has a first opening 4 and a second opening 5 for the rebar to pass through. The first opening 4 is located at the bottom of the reaction frame 1, and the second opening 5 is located on the side of the reaction frame 1. A suspension support beam 6 is provided between the first opening 4 and the second opening 5. In this embodiment, the reaction frame 1 is a frame structure, which can be a circular frame structure or a rectangular frame structure. In specific implementation, the pull-out device 3 is electrically connected to an external back-end control system via wires. During testing, the worker hangs the rebar 9 on the suspension support beam 6 and moves or lifts the operating handle 8 on the pull-out device 3. The pull-out device 3 feeds back the pull-out force to the back-end control system for display in real time.

[0021] To facilitate the manufacture of the reaction frame 1, in the above embodiment, preferably, the reaction frame 1 is a rectangular frame structure, which includes four suspended support beams 6 and four vertical support columns 7;

[0022] The four suspension support beams 6 are welded together to form a lower rectangular frame. The lower ends of the four vertical support columns 7 are welded to the four corners of the lower rectangular frame, and the top of the vertical support columns 7 is welded together to the bottom surface of the support plate 2. In this embodiment, the reaction frame 1 is a rectangular frame structure, and the dimensional accuracy requirements of the suspension support beams 6 and the vertical support columns 7 are low, making it easy to manufacture.

[0023] To further reduce manufacturing costs, in the above embodiments, preferably, both the suspension support beam 6 and the vertical support column 7 are made of angle steel.

[0024] In the above embodiments, all components are commercially available products.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for detecting the pull-out of rebar in ballastless track in tunnel sections, characterized in that: The utility model relates to a kind of anti-force frame and pull-out test device, including anti-force frame (1), support plate (2) fixed in the top of anti-force frame (1), pull-out test device (3) fixed at the geometric center position of the top plate surface of support plate (2), first open mouth (4) and second open mouth (5) for the steel bar passing through are provided on the anti-force frame (1), the first open mouth (4) is located at the bottom of anti-force frame (1), the second open mouth (5) is located at the side of anti-force frame (1), and there is hanging support beam (6) between the first open mouth (4) and the second open mouth (5).

2. The tunnel section ballastless track bolt pulling detection device according to claim 1, characterized in that: The anti-force frame (1) is a rectangular frame structure, which includes four hanging support beams (6) and four vertical support columns (7). The first four hanging support beams (6) are integrally welded to form a lower rectangular frame, and the lower ends of the four vertical support columns (7) are respectively welded to the four corners of the lower rectangular frame, and the top ends of the vertical support columns (7) are integrally welded to the bottom plate surface of the support plate (2).

3. The tunnel section ballastless track bolt pulling detection device according to claim 1, characterized in that: The hanging support beam (6) and the vertical support column (7) are both made of angle steel.

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