Tunnel sprayed concrete shaping device

Abstract

The utility model relates to the field of tunnel shotcrete construction, in particular to a tunnel shotcrete shaping device which comprises a device body and an annular positioning steel pipe, and a transverse positioning steel pipe is transversely welded to the annular positioning steel pipe. A groove body is formed in the side portion of the device body, a connecting frame is arranged in the groove body in a clamped mode, and an overbreak control mesh is arranged in the connecting frame. The height of the shaping device is finely adjusted by arranging the cushion blocks under the walking wheels, the using requirement of the device when the field ground is uneven is met, the cushion blocks are mostly wood plates and are convenient to carry, after a tunnel is excavated, a center line and the height are set out in advance through a measuring instrument, the direction and the height of the shaping device are adjusted through the wood cushion blocks, and after positioning is completed, the height of the shaping device is adjusted. The tunnel sprayed concrete shaping device is moved to the position below a face needing to be sprayed and mixed through the moving wheels, the annular positioning steel pipe is used for judging whether an excavation contour face is under-excavated or not, if not, under-excavation exists, and a cannon head machine needs to be adopted for chiseling away the under-excavation part.

Description

Technical Field

[0001] The utility model relates to the field of tunnel shotcrete construction, in particular to a tunnel shotcrete shaping device. Background Art

[0002] With the development of tunnel engineering, tunnel excavation technology has higher and higher requirements for the profile. During the excavation process, the excavation surface after tunnel blasting cannot ensure the complete profile and there is a certain amount of over-excavation and under-excavation, which makes the flatness after spraying and mixing poor, affecting the later application of the secondary lining waterproofing membrane, and even causing damage to the waterproofing membrane. In terms of controlling over-excavation and under-excavation, a cross-section instrument is often used to scan the cross-section statistical data, and then guide the tunnel shotcrete construction to ensure the flatness of the cross-section profile.

[0003] A Chinese patent discloses a concrete shaping device (authorization announcement number CN 115787654 A). This patented technology can significantly reduce the time for setting up molds, labor and related equipment, and effectively shorten the construction period. However, due to the defects of the instrument itself, the scanning point is largely determined by human factors, and the scanning range is limited, resulting in certain errors. At the same time, the shotcrete technology does not have a suitable reference point to control the flatness, resulting in the on-site spraying and mixing failing to meet the specification requirements, and repeated spraying increases manpower and financial investment.

[0004] Therefore, those skilled in the art provide a tunnel shotcrete shaping device to solve the problems raised in the above background technology. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a tunnel shotcrete shaping device, comprising a device body and an annular positioning steel pipe, wherein the annular positioning steel pipe is horizontally welded with a transverse positioning steel pipe;

[0006] A groove body is provided on the side of the device body, and a connecting frame is provided inside the groove body. An over-excavation control mesh is provided inside the connecting frame. There are two over-excavation control meshes. Two through holes are provided on the connecting frame, and fixing bolts are fastened to through holes one and two.

[0007] Preferably: longitudinal positioning steel pipes are welded on both sides of the transverse positioning steel pipe, and the number of transverse positioning steel pipes and longitudinal positioning steel pipes can be set as required.

[0008] Preferably: a bottom plate is provided at the bottom of the longitudinal positioning steel pipe, and a fixed block is provided on the outer side of the bottom plate, a fixed frame is provided at the upper end of the fixed block, an empty slot is provided inside the fixed frame, and wooden pads and measuring instruments are placed inside the empty slot, a rotating block is provided on the upper part of the fixed frame, a box door is provided on the right side of the rotating block, and a pull ring is fixed on the box door, and the number of hanging frames provided is four, and they are symmetrically arranged with each other.

[0009] Preferably: moving wheels are arranged at the bottom of the fixed block, the number of the moving wheels is four, and they are symmetrically arranged with each other, the moving wheels facilitate the movement of the entire device, the interior of the device body is provided with connecting plates, and through holes are opened on both sides of the connecting plates, the annular positioning steel pipes include two groups and are arranged longitudinally along the tunnel, the longitudinal spacing between the two is about meters, the size of the positioning steel pipe is consistent with the cross-sectional contour required for shotcrete after excavation, the longitudinal positioning steel pipes are arranged longitudinally along the tunnel, and a total of three are arranged, one is located at the top of the annular positioning steel pipe and welded thereto, and the other two are located at the bottom of the shaping device, the four axles are welded to the longitudinal positioning steel pipe and the annular positioning steel pipe, and the mesh material is made of round steel with a diameter of 8mm and a spacing of 200*200mm.

[0010] Technical effects and advantages of the utility model:

[0011] 1. The utility model fine-tunes the elevation of the shaping device by setting pads under the walking wheels to meet the use requirements of the device when the ground on site is uneven. The pads are mostly wooden boards, which are easy to carry. After the tunnel is excavated, the center line and elevation are released in advance by measuring instruments, and the direction and height of the shaping device are adjusted by several wooden pads. After positioning, the tunnel shotcrete shaping device is moved to the surface to be sprayed by the moving wheels, and the annular positioning steel pipe is used to determine whether the excavation contour surface is under-excavated. If it cannot move forward, there is under-excavation, and a blasting machine is required to chisel out the under-excavated part.

[0012] 2. Use the longitudinal positioning steel pipe to determine whether there is over-excavation. When over-excavation exists, align through hole 2 and through hole 1 on the over-excavation control mesh near the rock wall outside the shaping device, and connect them with fixing bolts. After completing the above work, remove the shotcrete shaping device and carry out the shotcrete process to ensure the smoothness of the sprayed concrete.

[0013] 3. When the over-excavation control mesh needs to be disassembled, the over-excavation control mesh can be disassembled by simply removing the fixing bolts from the main body of the device, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a tunnel shotcrete shaping device provided in an embodiment of the present application. Figure 1 ;

[0015] Figure 2 It is a schematic structural diagram of a top view of a tunnel shotcrete shaping device provided in an embodiment of the present application;

[0016] Figure 3 This is a schematic diagram of the structure of a tunnel shotcrete shaping device provided in an embodiment of the present application. Figure 2 ;

[0017] Figure 4It is a structural schematic diagram of a connecting plate, a through hole 1 and a trough body in a tunnel shotcrete shaping device provided in an embodiment of the present application;

[0018] Figure 5 It is a structural schematic diagram of a connection frame and an over-excavation control mesh in a tunnel shotcrete shaping device provided in an embodiment of the present application;

[0019] Figure 6 It is a structural schematic diagram of a fixed block, a fixed frame, a rotating block, a box door, a pull ring and a moving wheel in a tunnel shotcrete shaping device provided in an embodiment of the present application;

[0020] Figure 7 This is a tunnel shotcrete shaping device provided in the embodiment of the present application. Figure 1 The structural diagram at A in the middle;

[0021] Figure 8 This is a tunnel shotcrete shaping device provided in the embodiment of the present application. Figure 4 Schematic diagram of the structure at B in the figure.

[0022] In the figure: 1. Device body; 2. Annular positioning steel pipe; 3. Horizontal positioning steel pipe; 4. Longitudinal positioning steel pipe; 5. Bottom plate; 6. Fixed block; 7. Fixed frame; 8. Rotating block; 9. Box door; 10. Pull ring; 11. Moving wheel; 12. Connecting plate; 13. Through hole one; 14. Trough body; 15. Connecting frame; 16. Over-excavation control mesh; 17. Through hole two; 18. Fixing bolts. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

[0024] Example 1

[0025] See also Figures 1 to 8In this embodiment, a tunnel shotcrete shaping device is provided, including a device body 1 and an annular positioning steel pipe 2, a transverse positioning steel pipe 3 is welded to the transverse side of the annular positioning steel pipe 2, longitudinal positioning steel pipes 4 are welded to both sides of the transverse positioning steel pipe 3, the number of transverse positioning steel pipes 3 and longitudinal positioning steel pipes 4 can be set as needed, a bottom plate 5 is set at the bottom of the longitudinal positioning steel pipe 4, a fixing block 6 is set on the outer side of the bottom plate 5, a fixing frame 7 is set at the upper end of the fixing block 6, an empty groove is set inside the fixing frame 7, a wooden pad and a measuring instrument are placed inside the empty groove, a rotating block 8 is set at the upper part of the fixing frame 7, a box door 9 is set on the right side of the rotating block 8, a pull ring 10 is fixed on the box door 9, the number of the hanging frames is four, and they are symmetrically arranged, a moving wheel 11 is set at the bottom of the fixing block 6, the number of the moving wheels 11 is four, and they are symmetrically arranged, and the moving wheel 11 facilitates the movement of the entire device:

[0026] The main body 1 of the device is provided with a connecting plate 12 inside, and a through hole 13 is opened on both sides of the connecting plate 12. A groove body 14 is opened on the side of the main body 1 of the device. A connecting frame 15 is clamped inside the groove body 14. An over-excavation control mesh 16 is arranged inside the connecting frame 15. The number of over-excavation control meshes 16 is two. A through hole 2 17 is opened on the connecting frame 15. The through hole 13 and the through hole 2 17 are fastened and connected with fixing bolts 18. If over-excavation occurs, the over-excavation control mesh 16 is used to control the smoothness of the spray mix. A number of wooden pads are prepared to fine-tune the entire device to ensure the elevation requirements. The annular positioning steel pipe 2 includes two groups and is arranged along the longitudinal direction of the tunnel. , the longitudinal spacing between the two is about 15 meters, the size of the positioning steel pipe is consistent with the cross-sectional profile required by the shotcrete after excavation, the longitudinal positioning steel pipe 4 is arranged along the longitudinal direction of the tunnel, and a total of three are set, one is located at the top of the annular positioning steel pipe 2 and welded thereto, and the other two are located at the bottom of the shaping device, which plays the role of longitudinally supporting the shaping device, and the four axles are welded to the longitudinal positioning steel pipe 4 and the annular positioning steel pipe 2. Further, a number of over-excavation control meshes 16 are prepared. When over-excavation occurs, the mesh is fixed to the outside of the tunnel shotcrete shaping device close to the rock wall for spraying and mixing. The mesh material is round steel with a diameter of 8mm and a spacing of 200*200mm;

[0027] When the over-excavation control mesh 16 needs to be installed, it is only necessary to align the through hole 13 and the through hole 2 17, and the over-excavation control mesh 16 can be installed using the fixing bolts 18. When the over-excavation control mesh 16 needs to be disassembled, it is only necessary to remove the fixing bolts 18 from the device body 1 to achieve the disassembly and installation of the over-excavation control mesh 16. Furthermore, pads are placed under the walking wheels to fine-tune the elevation of the shaping device to meet the use requirements of the device when the ground on site is uneven. The pads are mostly wooden boards for easy transportation. After the tunnel is excavated, the center line and elevation are released in advance using measuring instruments, and several wooden pads are used to adjust the direction and height of the shaping device. After positioning, the moving wheels 11 are used to move the tunnel shotcrete shaping device to the surface to be sprayed, and the annular positioning steel pipe 2 is used to determine whether the excavation contour surface is under-excavated. If it is impossible to move forward, there is under-excavation, and a blasting machine is required to remove the under-excavated part. Use the longitudinal positioning steel pipe 4 to determine whether there is over-excavation. When over-excavation exists, align the through hole 2 17 and the through hole 13 on the over-excavation control mesh 16 near the rock wall outside the shaping device, and connect them using the fixing bolts 18. After completing the above work, remove the shotcrete shaping device and carry out the shotcrete process to ensure the smoothness of the sprayed concrete.

[0028] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A tunnel shotcrete shaping device, comprising a device body (1) and an annular positioning steel pipe (2), characterized in that: The lateral positioning steel pipe (3) is provided for the lateral welding of the annular positioning steel pipe (2); A groove body (14) is provided on the side of the device body (1), a connecting frame (15) is provided inside the groove body (14), an over-excavation control mesh sheet (16) is provided inside the connecting frame (15), the number of the over-excavation control mesh sheets (16) is two, a second through hole (17) is provided on the connecting frame (15), and fixing bolts (18) are fastened to the first through hole (13) and the second through hole (17).

2. A tunnel shotcrete shaping device according to claim 1, characterized in that: Longitudinal positioning steel pipes (4) are welded on both sides of the transverse positioning steel pipe (3), and the number of transverse positioning steel pipes (3) and longitudinal positioning steel pipes (4) can be set as required.

3. A tunnel shotcrete shaping device according to claim 2, characterized in that: A bottom plate (5) is arranged at the bottom of the longitudinal positioning steel pipe (4), and a fixing block (6) is arranged on the outer side of the bottom plate (5).

4. A tunnel shotcrete shaping device according to claim 3, characterized in that: A fixing frame (7) is arranged at the upper end of the fixing block (6), an empty slot is arranged inside the fixing frame (7), and a wooden pad and a measuring instrument are placed inside the empty slot.

5. A tunnel shotcrete shaping device according to claim 4, characterized in that: A rotating block (8) is arranged on the upper part of the fixed frame (7), a box door (9) is arranged on the right side of the rotating block (8), a pull ring (10) is fixed on the box door (9), and the number of the hanging frames arranged is four and they are arranged symmetrically with each other.

6. A tunnel shotcrete shaping device according to claim 4, characterized in that: The bottom of the fixed block (6) is provided with moving wheels (11), and the number of the moving wheels (11) is four and they are symmetrically arranged with respect to each other.

7. The tunnel shotcrete shaping device according to claim 1, characterized in that: A connecting plate (12) is arranged inside the device body (1), and through holes (13) are provided on both sides of the connecting plate (12).

8. The tunnel shotcrete shaping device according to claim 1, characterized in that: The annular positioning steel pipes (2) include two groups and are arranged longitudinally along the tunnel, with a longitudinal spacing of 15 meters between the two groups. The size of the positioning steel pipes is consistent with the cross-sectional profile required for spraying concrete after excavation.

9. The tunnel shotcrete shaping device according to claim 2, characterized in that: The longitudinal positioning steel pipe (4) is arranged along the longitudinal direction of the tunnel, and is provided in three rows, one of which is located at the top of the annular positioning steel pipe (2) and is welded thereto, and the other two are located at the bottom of the shaping device. The four axles are welded together with the longitudinal positioning steel pipe (4) and the annular positioning steel pipe (2). The mesh material is made of round steel with a diameter of 8 mm and a spacing of 200*200 mm.

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