Tunnel secondary lining steel bar positioning device

Abstract

The utility model provides a tunnel secondary lining steel bar positioning device, which relates to the technical field of tunnel construction and comprises a pair of fixed plates arranged in parallel, T-shaped notches are respectively arranged on the outer sides of the two fixed plates, two movable plates are respectively connected in the two T-shaped notches in a sliding mode, one sides of the movable plates extend out of the T-shaped notches, and the other sides of the movable plates extend out of the T-shaped notches. A plurality of reinforcing steel bar limiting holes are formed in the movable plate extending out of the T-shaped notch at equal intervals; the two fixing plates are connected through a telescopic assembly. According to the lining reinforcing steel bar positioning device, the lining reinforcing steel bars of different models are fixed through the movable plates which are detachably connected and the fixed plates with the T-shaped notches, the situation that an overall positioning device is customized for being suitable for the different lining reinforcing steel bars is avoided, waste is reduced, and construction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, and particularly relates to a positioning device for the secondary lining steel bars of a tunnel. Background Technique

[0002] The secondary lining is the cast-in-place concrete or reinforced concrete lining constructed on the inner side of the initial support during the construction of a tunnel project, and together with the initial support, it forms a composite lining. Relatively speaking, the secondary lining refers to the inner lining constructed with materials such as concrete under the condition that the tunnel has been initially supported, so as to achieve the functions of strengthening the support, optimizing the route waterproof and drainage system, beautifying the appearance, and facilitating the installation of facilities such as communication, lighting, and monitoring, in order to meet the requirements of modern high-speed road tunnel construction.

[0003] With the great progress and development of tunnel construction technology in China, the requirements for construction standardization are getting higher and higher. As a very important part of the tunnel structure, the quality control of the secondary lining has become an important measure to enhance the overall stability and bearing capacity of the tunnel lining. At present, most of the steel bar positioning devices in the secondary lining need to make different types of steel bar positioning devices according to the lining steel bar models, which is easy to cause waste and complex construction processes. Content of the Utility Model

[0004] The utility model aims to solve at least to some extent the technical problems in the related technologies. For this purpose, the utility model provides a positioning device for the secondary lining steel bars of a tunnel.

[0005] The technical solution for the utility model to solve the technical problems is as follows: A positioning device for the secondary lining steel bars of a tunnel includes a pair of parallel fixed plates. T-shaped notches are respectively opened on the outer sides of the two fixed plates. Two movable plates are respectively slidably connected in the two T-shaped notches. One side of the movable plate extends out of the T-shaped notch, and a number of steel bar limiting holes are equally spaced on the movable plate extending out of the T-shaped notch; the two fixed plates are connected by a telescopic assembly.

[0006] Preferably, a number of first bolt holes are penetrated through the T-shaped notches on the fixed plates, and a number of corresponding second bolt holes are opened on the movable plates. Fixing bolts respectively pass through the first bolt holes and the second bolt holes to fix the movable plates on the fixed plates.

[0007] Preferably, the telescopic assembly includes two threaded rods. Threaded connection blocks are opened on the inner sides of the two fixed plates. One ends of the two threaded rods are respectively threadedly connected to the connection threaded holes on the inner sides of the two fixed plates, and the other ends of the two threaded rods are threadedly connected to a threaded sleeve.

[0008] Preferably, the threaded sleeve adopts a reverse and forward thread sleeve. By rotating the threaded sleeve, the two threaded rods extend out of the threaded sleeve.

[0009] Preferably, at least two groups of telescopic assemblies are connected between the two fixed plates.

[0010] Preferably, the telescopic assembly includes a connecting sleeve fixed to the inner side of a fixing plate. A connecting rod is slidably connected inside the connecting sleeve. One end of the connecting rod is connected to the end of the connecting sleeve through a first compression spring. A positioning block is slidably connected vertically on the top of the connecting rod, and the bottom of the positioning block is connected to the connecting rod through a second compression spring. A plurality of positioning holes are formed in the top of the connecting sleeve, and the positioning block can protrude from the positioning holes to limit the connecting rod. The other end of the connecting rod is fixedly connected to another fixing plate.

[0011] Preferably, a limiting groove is axially formed on the inner wall of the connecting sleeve, and a limiting block is axially connected to the connecting rod. The limiting block can slide in the limiting groove.

[0012] Compared with the prior art, the above technical solution has the following advantages or beneficial effects:

[0013] 1. The utility model realizes the fixation of lining steel bars of different models through the detachable movable plate and the fixing plate with a T-shaped notch, avoiding the customization of an overall positioning device for different lining steel bars, reducing waste and improving construction efficiency.

[0014] 2. The utility model realizes the adjustment of the distance between the two fixing plates through the telescopic assembly, which can not only ensure the distance between the steel bar layers but also be applicable to the positioning between steel bar layers with different distances, and has strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The attached drawings forming a part of this specification are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation to the utility model.

[0016] Figure 1 is a schematic structural diagram of the utility model.

[0017] Figure 2 is a top view of the utility model.

[0018] Figure 3 is a schematic cross-sectional view taken along line A-A.

[0019] Figure 4 is a schematic cross-sectional view taken along line B-B.

[0020] Figure 5 is a schematic diagram of the connection part of the utility model.

[0021] Figure 6 is a schematic structural diagram of the second embodiment.

[0022] Figure 7 is a schematic diagram of the telescopic assembly in the second embodiment.

[0023] Description of the reference numerals:

[0024] 1. Fixed plate; 11. T-shaped notch; 2. Movable plate; 21. First bolt hole; 22. Second bolt hole; 23. Steel bar limiting hole; 3. Telescopic assembly; 31. Threaded sleeve; 32. Threaded rod; 33. Connecting sleeve; 34. First compression spring; 35. Connecting rod; 36. Positioning hole; 37. Positioning block; 38. Second compression spring; 39. Limiting block; 310. Limiting groove; 4. Fixed bolt. Detailed implementation manners

[0025] In order to clearly illustrate the technical features of this solution, the following will elaborate on the present utility model through specific implementation manners and in combination with its accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. In addition, the present utility model may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. The present utility model omits the description of well-known components, processing techniques and processes to avoid unnecessarily limiting the present utility model. The orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] Embodiment 1:

[0027] Refer to Figures 1-5, this embodiment proposes a positioning device for the secondary lining steel bars of a tunnel, which includes a pair of parallel fixed plates 1. T-shaped notches 11 are opened on the outer sides of the two fixed plates 1. Two movable plates 2 are respectively slidably connected in the two T-shaped notches 11. One side of the movable plate 2 extends out of the T-shaped notch 11, and a number of steel bar limiting holes 23 are equally spaced on the movable plate 2 extending out of the T-shaped notch 11; the two fixed plates 1 are connected by a telescopic assembly 3, and two sets of telescopic assemblies 3 are connected between the two fixed plates 1. A number of first bolt holes 21 are opened through the T-shaped notches 11 on the fixed plates 1, and a number of corresponding second bolt holes 22 are opened on the movable plates 2. Fixed bolts 4 pass through the first bolt holes 21 and the second bolt holes 22 respectively to fix the movable plates 2 on the fixed plates 1.

[0028] The telescopic assembly 3 in this embodiment includes two threaded rods 32. Threaded connection blocks are opened on the inner sides of the two fixed plates 1. One ends of the two threaded rods 32 are respectively threadedly connected to the connection threaded holes on the inner sides of the two fixed plates 1, and the other ends of the two threaded rods 32 are threadedly connected to the threaded sleeve 31. The threaded sleeve 31 adopts a reverse-thread sleeve. When the threaded sleeve 31 is rotated, the two threaded rods 32 extend out of the threaded sleeve 31.

[0029] During specific construction, first select a suitable movable plate 2 according to the lining steel bar model, install the movable plate 2 into the T-shaped notch 11, and fix it with the fixed bolt 4. Then install the telescopic assembly 3. After forming the whole, make the steel bar limiting holes 23 correspond to the steel bars one by one, rotate the threaded sleeve 31 to control the steel bar layer spacing, and finally realize the positioning function of the secondary lining steel bars. After the steel bar spacing changes, remove the original movable plate 2 and replace it with a movable plate 2 suitable for the current steel bar spacing. Any damaged parts of this device can be disassembled and replaced.

[0030] Embodiment Two:

[0031] Refer to the appendix Figures 6-7 , other parts are the same as those in Embodiment One. The difference is that: the telescopic assembly 3 in this embodiment includes a connecting sleeve 33. The connecting sleeve 33 is fixed on the inner side of a fixed plate 1. A connecting rod 35 is slidably connected in the connecting sleeve 33. One end of the connecting rod 35 is connected to the end of the connecting sleeve 33 through a first compression spring 34. A positioning block 37 is slidably connected vertically on the top of the connecting rod 35. A second compression spring 38 is connected between the bottom of the positioning block 37 and the connecting rod 35; a number of positioning holes 36 are opened on the top of the connecting sleeve 33, and the positioning block 37 can eject out of the positioning holes 36 to limit the connecting rod 35; the other end of the connecting rod 35 is fixedly connected to the other fixed plate 1. A limiting groove 310 is axially opened on the inner wall of the connecting sleeve 33, and a limiting block 39 is axially connected to the connecting rod 35. The limiting block 39 can slide in the limiting groove 310. The arrangement of the limiting block 39 and the limiting groove 310 can ensure that the positioning holes 36 and the positioning block 37 are always in a straight line without deviation.

[0032] When the telescopic component 3 in this embodiment is in use, only need to press the positioning block 37. After the positioning block 37 is separated from the connecting sleeve 33, continuously pull out the connecting rod 35 from the connecting sleeve 33. After reaching the required length, only need to align the positioning block 37 with the positioning hole 36, and then the second compression spring 38 can pop up the positioning block 37 to fix the connecting sleeve 33 and the connecting rod 35. When it needs to be compressed, only need to press the positioning block 37 to press the connecting rod 35 into the connecting sleeve 33.

[0033] Although the specific implementation manners of the utility model are described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the utility model. Based on the technical solution of the utility model, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the utility model.

Claims

1. A positioning device for the secondary lining steel bars of a tunnel, characterized in that: It includes a pair of parallel fixed plates (1). T-shaped notches (11) are respectively opened on the outer sides of the two fixed plates (1). Two movable plates (2) are respectively slidably connected in the two T-shaped notches (11). One side of the movable plate (2) extends out of the T-shaped notch (11). A number of reinforcing bar limiting holes (23) are equally spaced on the movable plate (2) extending out of the T-shaped notch (11). The two fixed plates (1) are connected by a telescopic component (3).

2. The tunnel secondary lining steel bar positioning device according to claim 1, wherein: A number of first bolt holes (21) are penetrated through the T-shaped notch (11) on the fixed plate (1). A number of corresponding second bolt holes (22) are opened on the movable plate (2). Fixing bolts (4) respectively pass through the first bolt holes (21) and the second bolt holes (22) to fix the movable plate (2) on the fixed plate (1).

3. The tunnel secondary lining steel bar positioning device according to claim 1, characterized in that: The telescopic component (3) includes two threaded rods (32). Threaded connection blocks are opened on the inner sides of the two fixed plates (1). One ends of the two threaded rods (32) are respectively threadedly connected to the connecting threaded holes on the inner sides of the two fixed plates (1). The other ends of the two threaded rods (32) are threadedly connected to a threaded sleeve (31).

4. The tunnel secondary lining steel bar positioning device according to claim 3, characterized in that: The threaded sleeve (31) is a reverse-thread sleeve. When the threaded sleeve (31) is rotated, the two threaded rods (32) extend out of the threaded sleeve (31).

5. The tunnel secondary lining steel bar positioning device according to claim 3, characterized in that: At least two groups of telescopic components (3) are connected between the two fixed plates (1).

6. The tunnel secondary lining steel bar positioning device according to claim 1, wherein: The telescopic component (3) includes a connecting sleeve (33). The connecting sleeve (33) is fixed on the inner side of one fixed plate (1). A connecting rod (35) is slidably connected in the connecting sleeve (33). One end of the connecting rod (35) is connected to the end of the connecting sleeve (33) through a first compression spring (34). A positioning block (37) is vertically slidably connected on the top of the connecting rod (35). A second compression spring (38) is connected between the bottom of the positioning block (37) and the connecting rod (35). A number of positioning holes (36) are opened on the top of the connecting sleeve (33). The positioning block (37) can pop out of the positioning hole (36) to limit the connecting rod (35). The other end of the connecting rod (35) is fixedly connected to the other fixed plate (1).

7. The tunnel secondary lining steel bar positioning device according to claim 6, characterized in that: A limiting groove (310) is axially opened on the inner wall of the connecting sleeve (33). A limiting block (39) is axially connected to the connecting rod (35). The limiting block (39) can slide in the limiting groove (310).

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