Rapid positioning device and positioning method for advance grouting hole of tunnel

Abstract

The invention discloses a rapid positioning device and method for a tunnel advance grouting hole. The rapid positioning device comprises a convex lens, a film clamping base and a bulb which are sequentially arranged in a shell from front to back, and the convex lens is vertically arranged; the end, facing the tunnel face, of the positioning device is the front. The bulb is used for emitting light towards the front tunnel face side. A film is vertically inserted into the film clamping seat, a tunnel contour line and a designed grouting hole site are arranged on the film, and the tunnel contour line and the designed grouting hole site are transparent and are used for transmitting light to pass through; other positions on the film are light-proof; the convex lens is used for converging emitted light passing through the transparent position, bright light rays and bright dots are presented on the front tunnel face, the bright light rays coincide with the actual contour line of the tunnel face, and the position where the bright dots are located is the grouting hole position. By adopting the positioning device, the grouting hole can be quickly and accurately positioned, the hole site cannot be polluted in the grouting process, secondary positioning can be quickly carried out, and the hole site lofting error is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel grouting construction, and in particular relates to a rapid positioning device and positioning method for an advance grouting hole in a tunnel. Background Art

[0002] When the tunnel needs to be pre-grouted, the grouting holes need to be located on the face. Generally, the total station is used to place the points or the points are placed manually according to the relative coordinates. When the total station is used to place the points, it is necessary to place a hole position and mark a hole position, and mark all the hole positions at one time, which is easy to cause pollution. When placing points manually, the use of a tape measure is complicated and there are human errors. Summary of the invention

[0003] The purpose of the present invention is to provide a rapid positioning device and positioning method for advance grouting holes in a tunnel. The positioning device can realize rapid and accurate positioning of the grouting holes, the hole positions will not be contaminated during the grouting process, and secondary positioning can be performed quickly to reduce hole position layout errors. At the same time, the positioning device is easy to process and disassemble and can be reused.

[0004] The present invention adopts the following technical scheme: a fast positioning device for a tunnel advance grouting hole, comprising a convex lens, a film holder and a light bulb which are sequentially arranged in a housing from front to back, the convex lens is arranged vertically; the two convex sides thereof are located in the front and rear directions; the end of the positioning device facing the tunnel face is the front; the light bulb is used to emit light toward the front tunnel face side;

[0005] The film is vertically inserted into the film holder and arranged in a left-right direction. The film is provided with a tunnel outline and a designed grouting hole position. The tunnel outline and the designed grouting hole position are transparent for transmitting light through; other positions on the film are opaque;

[0006] The convex lens is used to converge the emitted light passing through the transparent part, presenting bright lines and bright dots on the front face, and aligning the bright lines with the actual contour line of the face. The location of the bright dots is the grouting hole.

[0007] Furthermore, a horizontal laser light is arranged above the bulb and outside the shell, and the vertical distance between the center of the horizontal laser light and the center of the bulb is equal to the vertical distance between the positioning point and the center of the tunnel.

[0008] Furthermore, a condenser is arranged between the bulb and the film holder, and the condenser is arranged vertically to enhance and change the light emitted by the bulb.

[0009] Furthermore, an emitting lens is arranged behind the bulb, and the emitting lens covers the rear half of the bulb.

[0010] Furthermore, the lower end of the shell is arranged on two parallel guide slides running forward and backward, and can slide forward and backward along the guide slides.

[0011] Furthermore, the two guide slides are connected to the leveling support through a vertically downward socket-jointed long steel pipe; the leveling support comprises a square upper plate and a lower plate, which are arranged at intervals from top to bottom and are parallel; the upper plate and the lower plate are connected and supported by foot screws, and horizontally centered bubbles (18) are arranged on the four sides of the upper wall of the upper plate and near the edges; a vertical laser light is arranged vertically downward at the center of the lower wall of the lower plate, and the vertical laser light (19) is used to determine that the positioning device is located in the longitudinal axis of the tunnel.

[0012] Furthermore, there are four foot screws, all located between the upper plate and the lower plate and at the four corners of the plate. Each foot screw is vertically arranged, with the upper end passing through the upper plate and the lower end located on the upper wall of the lower plate.

[0013] The present invention also discloses a positioning method of the above-mentioned rapid positioning device for a tunnel advance grouting hole, and the positioning method comprises the following steps:

[0014] Step 1: Marking of positioning points and positioning lines:

[0015] Mark the tunnel center point and positioning point on the tunnel face, with the positioning point located directly above the center point; mark the tunnel longitudinal axis on the tunnel surface;

[0016] Step 2: Preliminary positioning:

[0017] The film is inserted into the film holder, and the positioning device is moved forward along the longitudinal axis of the tunnel until the tunnel contour line projected on the tunnel face substantially coincides with the tunnel face contour line, and the movement is stopped;

[0018] Step 3: Horizontal positioning:

[0019] Turn on the vertical laser light, adjust the positioning device until the light emitted by the vertical laser light points to the longitudinal axis of the ground mark, and fix the positioning device; adjust the four foot screws clockwise or counterclockwise so that the four horizontal center bubbles are all centered;

[0020] Step 4: Vertical positioning: Turn on the horizontal laser light, determine whether the laser point pointing to the face coincides with the positioning point and adjust it. If the distance between the laser point and the positioning point is more than 1 cm, adjust the height of the socket-jointed long steel pipe until the laser point pointing to the face coincides with the positioning point; if the distance between the laser point and the positioning point is within 1 cm, adjust the four foot screws until the laser point pointing to the face coincides with the positioning point;

[0021] Step 5: Hole position layout: turn on the light bulb and install the film. The light from the light bulb first passes through the reflective lens and then through the condenser to illuminate the film. The light passes through the film and the convex lens and is projected onto the palm face. Move the shell back and forth on the guide slide until the contour line projected onto the palm face coincides with the contour line of the palm face. At this time, the bright spot projected on the palm face is the grouting hole position.

[0022] The beneficial effects of the present invention are: 1. The grouting holes set on the face are projected, and the positioning of all grouting holes is completed at one time, and the device can be used for tunnels with different cross-sectional contours and grouting hole positions under different designs. It only needs to replace the corresponding film according to different working conditions, and the positioning is accurate, efficient, and time-saving. 2. The light emitted by the horizontal laser lamp points to the positioning point, ensuring that the center point of the tunnel, the center of the bulb, and the center of the film are on the same horizontal line, thereby ensuring that the up, down, left, and right images of the image projected on the face are consistent with the holes in the contour line of the tunnel to ensure the accuracy of positioning. 3. The positioning device can be used in different tunnels, and only the corresponding film needs to be replaced, which is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a rapid positioning device for advanced grouting holes in tunnels;

[0024] Among them: 1. Shell; 2. Battery pack; 3. Bulb; 4. Reflective lens; 5. Condenser; 6. Film holder; 7. Convex lens; 8. Horizontal laser light; 9. Guide pulley; 10. Guide slide; 11. Inner connection point of guide slide; 12. Socket-jointed long steel pipe; 13. Positioning sheath hole; 14. Leveling support; 15. Upper plate; 16. Lower plate; 17. Foot screw; 18. Horizontal centering bubble; 19. Vertical laser light; 20. Support foot. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] The invention discloses a rapid positioning device for a tunnel advance grouting hole, such as Figure 1 As shown, it includes a convex lens 7, a film holder 6 and a light bulb 3 which are sequentially arranged in a housing (1 from front to back, the convex lens 7 is arranged vertically; its two convex sides are located in the front-to-back direction; wherein, the end of the positioning device facing the palm face is the front; the housing 1 is a rectangular parallelepiped. The convex lens 7, the film holder 6 and the light bulb 3 are located on the longitudinal midline of the housing 1. The light bulb 3 is used to emit light toward the front palm face side;

[0027] The film is vertically inserted into the film holder 6, and the film is arranged in a left-right direction. The film is provided with a tunnel outline and designed grouting holes. The tunnel outline and the designed grouting holes are transparent for transmitting light through; other positions on the film are opaque; the film holder 6 is vertically arranged, and has a bracket along the left-right direction. Any structure that can support the film can meet the requirements.

[0028] The convex lens 7 is used to converge the emitted light passing through the transparent part, presenting bright light and bright dots on the front face, coinciding the bright light with the actual contour line of the face, and the position of the bright dots is the grouting hole position. The horizontal distance between the film holder 6 and the convex lens 7 satisfies the following: the distance between the film holder 6 and the convex lens 7 is greater than the focal length of the convex lens 7, and less than twice the focal length of the convex lens 7.

[0029] A horizontal laser light 8 is disposed above the bulb 3 and outside the housing 1. The vertical distance between the center of the horizontal laser light 8 and the center of the bulb 3 is equal to the vertical distance between the positioning point and the center of the tunnel. The horizontal laser light 8 is connected to a battery pack 2 disposed in the housing 1.

[0030] A condenser 5 is arranged between the bulb 3 and the film holder 6 . The condenser 5 is arranged vertically and is used to enhance and change the light emitted by the bulb 3 .

[0031] An emitting lens 4 is arranged behind the bulb 3 , and the emitting lens 4 covers the rear half of the bulb 3 .

[0032] The lower end of the housing 1 is provided with two parallel guide slideways 10 that run forward and backward, and can slide forward and backward along the guide slideways 10. Two guide pulleys 9 are installed on the left and right sides of the lower end of the housing 1, with a total of four guide pulleys 9, and the guide pulleys 9 can slide forward and backward along the guide slideways 10. The two guide slideways 10 are connected by two steel bars arranged at intervals, and each connection point is an inner connection point 11 of the guide slideway. At the lower end of the guide slideway 10, and at the inner connection point 11 of the guide slideway, a vertically downward long socket-jointed steel pipe 12 is connected. The socket-jointed long steel pipe 12 is connected by two sections of steel pipes, and the upper section of the steel pipe is coaxially sleeved in the lower section of the steel pipe. A plurality of positioning pin holes 13 are opened at the lower end of the upper section of the steel pipe and at a section of the upper end of the upper section of the steel pipe, and are fixed by positioning pins. The upper section of the steel pipe is stretched upward or shortened downward, and can be rotated, and the positioning pins are inserted into different positioning pin holes 13 to be fixed, so as to change the height of the housing 1 in the vertical direction.

[0033] The two guide slides 10 are connected to the leveling support 14 through a vertically downward socket-jointed long steel pipe 12; the leveling support 14 includes a square upper plate 15 and a lower plate 16, which are arranged at intervals and parallel to each other; the upper plate 15 and the lower plate 16 are connected and supported by foot screws 17, and horizontally centered bubbles 18 are arranged on the four sides of the upper wall of the upper plate 15 and near the edges; a vertical laser light 19 is arranged vertically downward at the center of the lower wall of the lower plate 16, and the vertical laser light 19 emits light vertically downward and points to the longitudinal axis of the tunnel on the ground to ensure that the positioning device is on the longitudinal axis of the tunnel. Four legs 20 are connected under the leveling support 14, and the four legs 20 are arranged in an outward eight-shaped shape.

[0034] There are four foot screws 17 , all located between the upper plate 15 and the lower plate 16 , and at the four corners of the plates. Each foot screw 17 is vertically arranged, with the upper end passing through the upper plate 15 and the lower end located on the upper wall of the lower plate 16 .

[0035] The present invention also discloses a positioning method of the above-mentioned rapid positioning device for a tunnel advance grouting hole, and the positioning method comprises the following steps:

[0036] Step 1: Marking of positioning points and positioning lines:

[0037] Mark the tunnel center point and the positioning point on the face. The positioning point is located directly above the center point, usually about 5 cm. Mark the longitudinal axis of the tunnel on the surface inside the tunnel.

[0038] Step 2: Preliminary positioning:

[0039] The construction personnel hold the rapid positioning device and move forward along the longitudinal axis of the tunnel marked on the ground until the tunnel contour line projected on the tunnel face basically matches the tunnel contour line, then stop moving and complete the preliminary positioning. Specifically, the longitudinal center line of the positioning device coincides with the longitudinal line of the tunnel passing through the center point.

[0040] Step 3: Horizontal positioning:

[0041] In step 2, the preliminary positioning is completed. The positioning device is set to the initially determined position, the vertical laser light 19 is turned on, and then the position is adjusted until the light emitted by the vertical laser light 19 points to the longitudinal axis of the ground mark, and then the legs are fixed, and the positioning device is fixed; so that the lower plate 16 of the leveling support 14 is about 1.5m above the ground. The four foot screws 17 are adjusted clockwise or counterclockwise so that the four horizontal centering bubbles 18 are all centered; then the length of the vertical socket long steel pipe 12 is determined according to the height of the positioning point, and the vertical socket long steel pipe 12 and the shell 1 are installed.

[0042] Step 4, vertical positioning: turn on the horizontal laser light 8, determine whether the laser point pointing to the face coincides with the positioning point and adjust them. If the distance between the laser point and the positioning point is large, more than 1 cm, adjust the height of the socket long steel pipe 12 until the laser point pointing to the face coincides with the positioning point; if the distance between the laser point and the positioning point is within 1 cm, adjust the four foot screws 17 until the laser point pointing to the face coincides with the positioning point; at this time, the center of the bulb 3, the center of the film, the center of the convex lens 7 and the center point of the tunnel are on the same horizontal line.

[0043] Step 5, hole position layout: turn on the light bulb 3, install the film, if the film is filmed in a room-down manner consistent with the upper and lower positions of the face, after imaging, the position of the grouting hole on the film is opposite to the actual face hole position, so when the film is installed in the film holder 6, the upper and lower ends of the film are inverted. The film is wrapped with a layer of heat-insulating glass to prevent the film from being deformed by heat. The light from the light bulb 3 first passes through the reflective lens 4 and then through the condenser 5, so that the light is evenly irradiated on the film. The light passes through the film and the convex lens 7 and is projected onto the face; the bright light is the contour line of the projection, and the contour line of the projection does not coincide with the contour line of the face. At this time, it is necessary to move forward or backward along the guide slide 10 through the guide pulley 9 to drive the housing 1 to move forward and backward until the contour line projected on the face coincides with the contour line of the face. At this time, the bright spot projected on the face is the grouting hole position.

[0044] In the present invention, the positions of the grouting holes set by projection on the tunnel face are used to complete the positioning of multiple grouting holes at one time. The positioning is accurate and efficient, and the grouting holes will not be contaminated. The grouting hole positions on the film can be customized, that is, the device can be used for tunnels with different cross-sectional contours and grouting hole positions under different designs, and only the corresponding films need to be replaced for different working conditions. After the initial positioning, the hole position is staked out, that is, the secondary positioning is quickly performed to reduce the hole position stakeout error.

Claims

1. A rapid positioning device for advanced grouting holes in a tunnel, characterized in that: It comprises a convex lens (7), a film holder (6) and a light bulb (3) which are arranged in sequence from front to back in a housing (1); the convex lens (7) is arranged vertically; its two convex sides are located in the front-to-back direction; the end of the positioning device facing the palm face is the front; The light bulb (3) is used to emit light toward the front palm face side; The film is vertically inserted into the film holder (6), and the film is arranged in a left-right direction. The film is provided with a tunnel outline and a designed grouting hole position, and the tunnel outline and the designed grouting hole position are both transparent and used for transmitting light through; other positions on the film are opaque; The convex lens (7) is used to converge the emitted light passing through the transparent portion, presenting bright lines and bright dots on the front face, and aligning the bright lines with the actual contour line of the face. The position of the bright dots is the grouting hole position.

2. A rapid positioning device for a tunnel advance grouting hole according to claim 1, characterized in that: A horizontal laser light (8) is arranged above the light bulb (3) and outside the housing (1); the vertical distance between the center of the horizontal laser light (8) and the center of the light bulb (3) is equal to the vertical distance between the positioning point and the center point of the tunnel.

3. A rapid positioning device for a tunnel advance grouting hole according to claim 2, characterized in that: A condenser (5) is arranged between the light bulb (3) and the film holder (6); the condenser (5) is arranged vertically and is used to enhance and change the light emitted by the light bulb (3).

4. A rapid positioning device for advanced grouting holes in a tunnel as claimed in claim 3, characterized in that: A transmitting lens (4) is arranged behind the light bulb (3), and the transmitting lens (4) covers the rear half of the light bulb (3).

5. A rapid positioning device for advanced grouting holes in a tunnel as claimed in claim 4, characterized in that: The lower end of the shell (1) is arranged on two parallel guide slideways (10) extending forward and backward, and can slide forward and backward along the guide slideways (10).

6. A rapid positioning device for advanced grouting holes in a tunnel as claimed in claim 5, characterized in that: The two guide slideways (10) are connected to a leveling support (14) through a vertically downward socket-jointed long steel pipe (12); the leveling support (14) comprises a square upper plate (15) and a lower plate (16), the upper plate (15) and the lower plate (16) being arranged at intervals from top to bottom and parallel to each other; the upper plate (15) and the lower plate (16) are connected and supported by foot screws (17), and horizontally centered bubbles (18) are arranged on four sides of the upper wall of the upper plate (15) and near the edges; a vertical laser light (19) pointing vertically downward is arranged at the center of the lower wall of the lower plate (16), and the vertical laser light (19) is used to determine that the positioning device is located in the longitudinal axis of the tunnel.

7. A rapid positioning device for advanced grouting holes in a tunnel as claimed in claim 6, characterized in that: There are four foot screws (17), all located between the upper plate (15) and the lower plate (16), and located at the four corners of the plate. Each foot screw (17) is vertically arranged, with the upper end passing through the upper plate (15) and the lower end located on the upper wall of the lower plate (16).

8. A positioning method for a fast positioning device for a tunnel advance grouting hole according to any one of claims 1 to 7, characterized in that: The positioning method comprises the following steps: Step 1: Marking of positioning points and positioning lines: Marking the tunnel center point and the positioning point on the tunnel face, wherein the positioning point is located directly above the center point; marking the tunnel longitudinal axis on the surface inside the tunnel; Step 2: Preliminary positioning: The film is inserted into the film holder (6), and the positioning device is moved forward along the longitudinal axis of the tunnel until the tunnel contour line projected on the tunnel face substantially coincides with the tunnel face contour line, and the movement is stopped; Step 3: Horizontal positioning: Turn on the vertical laser light, adjust the positioning device until the light emitted by the vertical laser light points to the longitudinal axis of the ground mark, and fix the positioning device; adjust the four foot screws (17) clockwise or counterclockwise so that the four horizontal center bubbles (18) are all centered; Step 4, vertical positioning: turn on the horizontal laser light (8), determine whether the laser point pointing to the face coincides with the positioning point and adjust them; if the distance between the laser point and the positioning point is more than 1 cm, adjust the height of the socket-jointed long steel pipe (12) until the laser point pointing to the face coincides with the positioning point; if the distance between the laser point and the positioning point is within 1 cm, adjust the four foot screws (17) until the laser point pointing to the face coincides with the positioning point; Step 5, hole position layout: turn on the light bulb (3), install the film, the light of the light bulb (3) first passes through the reflective lens (4) and then passes through the condenser (5) to irradiate the film, and the light passes through the film and the convex lens (7) and is projected onto the face of the tunnel; move the housing (1) back and forth on the guide slide (10) until the contour line projected onto the face of the tunnel coincides with the contour line of the face of the tunnel, and at this time, the bright spot projected on the face of the tunnel is the grouting hole position.

Images