Deviation preventing device for advanced drilling

Abstract

An advanced drilling deviation preventing device comprises a guide pipe and a length adjusting device, the guide pipe is arranged in an advanced drilling preformed hole, the length of the guide pipe is larger than that of the advanced drilling preformed hole, a drilling machine is fixedly arranged in a heading machine tight supporting shield, and a drill rod arranged on the drilling machine penetrates through the guide pipe to conduct advanced reinforcing construction on a tunnel wall. The guide pipe is connected with a heading machine tight supporting shield through the length adjusting device, and the position of the guide pipe in the advance drilling reserved hole is controlled through the length adjusting device in the using process, so that the end of the guide pipe makes contact with the hole wall excavated by a heading machine. According to the design, the drill pipe can be guided through the guide pipe, deviation of the drill pipe during advanced reinforcement construction is prevented, and the position of the guide pipe in an advanced drilling preformed hole can be adjusted through the length adjusting device, so that the guide pipe adapts to hole walls of different sizes.

Description

Technical Field

[0001] The invention relates to an anti-deviation device, in particular to an anti-deviation device for advanced drilling. Background Art

[0002] A pumped-storage power station, also known as a storage hydropower station, is a hydropower station that uses excess electricity to pump water from the lower reservoir to the upper reservoir during low power load periods, and then releases water to the lower reservoir for power generation during peak power load periods. The pumped-storage tunnel is an important component of a pumped-storage power station for conveying water, and is usually constructed using the shield method.

[0003] When using the shield method to construct a pumped-storage tunnel, the tunnel boring machine needs to pass through hard strata such as rock strata or soft and broken surrounding rocks with poor self-stability, fault fracture zones, sandy soil layers and other adverse geological conditions. In order to ensure construction safety and speed up construction progress, it is necessary to use an advance drilling rig to pre-reinforce the strata to keep the surrounding rock of the excavation surface stable.

[0004] Generally, a number of reserved holes for installing advance drilling rigs are set on the support shield of the tunnel boring machine. The advance drilling rig is installed only when the stratum needs advance reinforcement. The advance drilling rig needs to be dismantled after the advance reinforcement of the stratum is completed. During the construction process, the advance drill constructs the inner wall of the tunnel through the reserved holes in the support shield.

[0005] Although this advance drilling device can flexibly carry out advance reinforcement construction according to the formation conditions, it still has the following defects:

[0006] Since there is a certain gap between the inner wall of the tunnel and the outer wall of the support shield, the drill bit is prone to deviation during advance drilling construction, resulting in poor accuracy.

[0007] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the application, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0008] The purpose of the present invention is to overcome the disadvantage of poor accuracy of the advance drilling bit in the prior art and to provide an advance drilling anti-deviation device with high accuracy of the advance drilling bit.

[0009] To achieve the above objectives, the technical solution of the present invention is:

[0010] A forward drilling anti-deviation device, the anti-deviation device comprising: an anti-deviation pipe;

[0011] The anti-deviation tube is used to limit the drill rod of the advance drill to prevent the drill rod from deviating. The top of the anti-deviation tube is arranged between the tunnel boring machine support shield and the cave wall excavated by the tunnel boring machine. The anti-deviation tube is coaxially arranged with the advance drill reserved hole, and the inner diameter of the anti-deviation tube is larger than the diameter of the drill rod.

[0012] One end of the anti-deviation pipe arranged outside the tunnel boring machine's support shield is an oblique opening, and the end surface of the oblique opening is parallel to the wall of the tunnel excavated by the tunnel boring machine.

[0013] The anti-deviation device also includes a length adjustment device, the outer diameter of the anti-deviation tube is less than or equal to the inner diameter of the advance drilling reserved hole, the length of the anti-deviation tube is greater than the length of the advance drilling reserved hole, the outer wall of the anti-deviation tube is slidably matched with the inner wall of the advance drilling reserved hole, one end of the anti-deviation tube is arranged on the outside of the tunnel boring machine support shield, the other end of the anti-deviation tube passes through the advance drilling reserved hole and is fixedly connected to the telescopic end of the length adjustment device, and the fixed end of the length adjustment device is fixedly connected to the tunnel boring machine support shield.

[0014] The advance drilling rig is fixedly arranged inside the tunnel boring machine support shield, the power output end of the drilling rig is fixedly connected to the drill rod, the drill rod is arranged in the anti-deviation pipe, and the length of the drill rod is greater than the length of the anti-deviation pipe.

[0015] The length adjustment device includes a connecting pipe and a first flange, wherein the connecting pipe is arranged inside the tunnel boring machine support shield, the connecting pipe and the first flange are coaxially arranged with the advance drilling reserved hole, the connecting pipe is sleeved on the anti-deviation pipe, the connecting pipe and the anti-deviation pipe are slidably matched, one end of the connecting pipe is fixedly connected to the end of the advance drilling reserved hole, and the other end of the connecting pipe is fixedly connected to the first flange;

[0016] The anti-deviation pipe is arranged on one end inside the tunnel boring machine support shield and is fixedly provided with a second flange, and the second flange is connected to the first flange through a plurality of adjustment bolts.

[0017] The anti-deviation pipe is clearance-matched with the drill rod.

[0018] The anti-deviation pipe is fitted with the advance drilled reserved hole.

[0019] The length of the anti-deviation pipe is greater than the length between the first flange and the outer wall of the tunnel boring machine supporting shield.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the anti-deviation device for advanced drilling of the present invention, the anti-deviation tube is arranged in the reserved hole for advanced drilling, the length of the anti-deviation tube is greater than the length of the reserved hole for advanced drilling, the drilling rig is fixedly arranged inside the support shield of the tunnel boring machine, and the drill rod arranged on the drilling rig passes through the anti-deviation tube to perform advanced reinforcement construction on the tunnel wall. Therefore, the design can guide the drill rod through the anti-deviation tube to prevent the drill rod from deviating during advanced reinforcement construction, and effectively improve the accuracy of advanced drilling.

[0022] 2. In the anti-deviation device for the advance drilling of the present invention, the anti-deviation tube is slidably matched with the advance drilling reserved hole, and the anti-deviation tube is connected to the tunnel boring machine support shield through a length adjustment device. When in use, the position of the anti-deviation tube in the advance drilling reserved hole is controlled by the length adjustment device, so that the end of the anti-deviation tube contacts the tunnel wall excavated by the tunnel boring machine. Therefore, the design can adjust the position of the anti-deviation tube in the advance drilling reserved hole through the length adjustment device, so that the anti-deviation tube can adapt to tunnel walls of different sizes, effectively expanding the application range of the advance drilling.

[0023] 3. In the anti-deviation device for advanced drilling of the present invention, the anti-deviation tube and the drill rod are matched with each other in clearance, the anti-deviation tube and the advanced drilling reserved hole, one end of the anti-deviation tube is an oblique end face parallel to the cave wall excavated by the tunnel boring machine, when the anti-deviation tube is extended until the anti-deviation tube contacts the cave wall, the oblique end face of the anti-deviation tube can be firmly contacted with the cave wall, ensuring that the anti-deviation tube is firmly fixed, further improving the positioning and guiding effect on the drill rod, and preventing the drill rod from deviating and causing safety hazards. Therefore, this design can effectively improve the safety of advanced drilling through the oblique end face of the anti-deviation tube.

[0024] 4. In the anti-deviation device for the advance drill of the present invention, the second flange is connected to the first flange by a plurality of adjustment bolts, so that the advance drill can be disassembled or installed to the corresponding hole position as needed. Therefore, the design effectively improves the flexibility of the advance drill by connecting the second flange to the first flange by a plurality of adjustment bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 yes Figure 1 Schematic diagram of the structure of the mid-length adjustment device.

[0027] Figure 3 yes Figure 1 Schematic diagram of the structure of the connection between the middle anti-drifting pipe and the tunnel boring machine support shield.

[0028] In the figure: anti-deviation pipe 1, second flange 11, adjustment bolt 12, bevel 13, length adjustment device 2, connecting pipe 21, first flange 22, drilling rig 3, drill rod 4, tunneling machine support shield 5, advance drilling reserved hole 6. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] See also Figures 1 to 3 , a leading drilling anti-deviation device, the anti-deviation device comprising: an anti-deviation tube 1;

[0031] The anti-deviation tube 1 is used to limit the drill rod 4 of the advance drill to prevent the drill rod 4 from deviating. The top of the anti-deviation tube 1 is arranged between the tunnel boring machine support shield 5 and the cave wall excavated by the tunnel boring machine. The anti-deviation tube 1 is coaxially arranged with the advance drill reserved hole 6, and the inner diameter of the anti-deviation tube 1 is larger than the diameter of the drill rod 4.

[0032] One end of the anti-deviation pipe 1 disposed outside the tunnel boring machine support shield 5 is an oblique opening 13, and the end surface of the oblique opening 13 is parallel to the wall of the tunnel excavated by the tunnel boring machine.

[0033] The anti-deviation device also includes a length adjustment device 2, the outer diameter of the anti-deviation tube 1 is less than or equal to the inner diameter of the advance drilling reserved hole 6, the length of the anti-deviation tube 1 is greater than the length of the advance drilling reserved hole 6, the outer wall of the anti-deviation tube 1 is slidably matched with the inner wall of the advance drilling reserved hole 6, one end of the anti-deviation tube 1 is arranged on the outside of the tunnel boring machine support shield 5, the other end of the anti-deviation tube 1 passes through the advance drilling reserved hole 6 and is fixedly connected to the telescopic end of the length adjustment device 2, and the fixed end of the length adjustment device 2 is fixedly connected to the tunnel boring machine support shield 5.

[0034] The advance drilling rig 3 is fixedly arranged inside the tunnel boring machine support shield 5, and the power output end of the drilling rig 3 is fixedly connected to the drill rod 4, and the drill rod 4 is arranged in the anti-deviation tube 1, and the length of the drill rod 4 is greater than the length of the anti-deviation tube 1.

[0035] The length adjustment device 2 includes a connecting pipe 21 and a first flange 22. The connecting pipe 21 is arranged inside the tunnel boring machine support shield 5. The connecting pipe 21 and the first flange 22 are coaxially arranged with the advance drilling reserved hole 6. The connecting pipe 21 is sleeved on the anti-deviation pipe 1. The connecting pipe 21 and the anti-deviation pipe 1 are slidably matched. One end of the connecting pipe 21 is fixedly connected to the end of the advance drilling reserved hole 6, and the other end of the connecting pipe 21 is fixedly connected to the first flange 22.

[0036] The anti-deviation pipe 1 is arranged at one end inside the tunnel boring machine support shield 5 and is fixedly provided with a second flange 11 . The second flange 11 is connected to the first flange 22 via a plurality of adjustment bolts 12 .

[0037] The anti-deviation tube 1 and the drill rod 4 are clearance-matched.

[0038] The anti-deviation pipe 1 is fitted with the advance drilled reserved hole 6 .

[0039] The length of the anti-deviation pipe 1 is greater than the length between the first flange 22 and the outer wall of the tunnel boring machine support shield 5 .

[0040] The principle of the present invention is described as follows:

[0041] In the present design, the angle between the drill rod 4 and the wall of the tunnel dug by the tunnel boring machine is 8 to 10 degrees, and the distance between the outer wall of the tunnel boring machine support shield 5 and the wall of the tunnel dug by the tunnel boring machine is 10 to 30 centimeters. Since the angle between the drill rod 4 and the wall of the tunnel is small, the drill rod 4 will be subjected to a large radial force during drilling, causing the drill rod 4 to move away from the wall of the tunnel, thereby causing the drill bit to deviate. The present design limits the drill rod 4 by means of the anti-deviation tube 1, so that the drill rod 4 can accurately drill along the designed path under the guidance of the anti-deviation device.

[0042] Embodiment 1:

[0043] See also Figure 1 , a device for preventing the advance drilling from deviating, the device comprising: an anti-deviation tube 1; the anti-deviation tube 1 is used to limit the drill rod 4 of the advance drilling to prevent the drill rod 4 from deviating, the top of the anti-deviation tube 1 is arranged between the tunnel boring machine support shield 5 and the cave wall excavated by the tunnel boring machine, the anti-deviation tube 1 is coaxially arranged with the advance drilling reserved hole 6, and the inner diameter of the anti-deviation tube 1 is greater than the diameter of the drill rod 4; the end of the anti-deviation tube 1 arranged outside the tunnel boring machine support shield 5 is an oblique opening 13, and the end face of the oblique opening 13 is parallel to the cave wall excavated by the tunnel boring machine; the anti-deviation device also includes a length adjustment device 2, the outer diameter of the anti-deviation tube 1 is less than or equal to the diameter of the advance drilling reserved hole 6, the length of the anti-deviation tube 1 is greater than the length of the advance drilling reserved hole 6, the outer wall of the anti-deviation tube 1 is slidably matched with the inner wall of the advance drilling reserved hole 6, one end of the anti-deviation tube 1 is arranged outside the tunnel boring machine support shield 5, and the other end of the anti-deviation tube 1 passes through the advance drilling reserved hole 6 and is fixedly connected with the telescopic end of the length adjustment device 2, and the fixed end of the length adjustment device 2 is fixedly connected with the tunnel boring machine support shield 5; the drill rig 3 of the advance drilling is fixedly arranged inside the tunnel boring machine support shield 5, the power output end of the drill rig 3 is fixedly connected with the drill rod 4, the drill rod 4 is arranged in the anti-deviation tube 1, and the length of the drill rod 4 is greater than the length of the anti-deviation tube 1.

[0044] Embodiment 2:

[0045] See also Figures 2 to 3The length adjustment device 2 includes a connecting pipe 21 and a first flange 22. The connecting pipe 21 is arranged inside the tunnel boring machine support shield 5. The connecting pipe 21 and the first flange 22 are coaxially arranged with the advance drilling reserved hole 6. The connecting pipe 21 is sleeved on the anti-deviation pipe 1. The connecting pipe 21 and the anti-deviation pipe 1 are slidably matched. One end of the connecting pipe 21 is fixedly connected to the end of the advance drilling reserved hole 6, and the other end of the connecting pipe 21 is fixedly connected to the first flange 22; a second flange 11 is fixedly arranged on one end of the anti-deviation pipe 1 arranged inside the tunnel boring machine support shield 5, and the second flange 11 is connected to the first flange 22 through a plurality of adjustment bolts 12.

[0046] Embodiment 3:

[0047] The anti-deviation tube 1 is clearance-matched with the drill rod 4; the anti-deviation tube 1 is fitted with the advance drilling reserved hole 6; the length of the anti-deviation tube 1 is greater than the length between the first flange 22 and the outer wall of the tunnel boring machine support shield 5.

[0048] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. A device for preventing deviation of advanced drilling, characterized in that: The anti-deviation device comprises: an anti-deviation tube (1); The anti-deviation pipe (1) is used to limit the position of the drill rod (4) of the advance drill to prevent the drill rod (4) from deviating. The top end of the anti-deviation pipe (1) is arranged between the tunnel boring machine support shield (5) and the wall of the tunnel excavated by the tunnel boring machine. The anti-deviation pipe (1) is coaxially arranged with the advance drill reserved hole (6). The inner diameter of the anti-deviation pipe (1) is greater than the diameter of the drill rod (4).

2. The advance drilling anti-deviation device according to claim 1, characterized in that: One end of the anti-deviation pipe (1) arranged outside the tunnel boring machine support shield (5) is an oblique opening (13), and the end surface of the oblique opening (13) is parallel to the wall of the tunnel excavated by the tunnel boring machine.

3. The advance drilling anti-deviation device according to claim 1 or 2, characterized in that: The anti-deviation device also includes a length adjustment device (2); the outer diameter of the anti-deviation tube (1) is less than or equal to the inner diameter of the advance drilling reserved hole (6); the length of the anti-deviation tube (1) is greater than the length of the advance drilling reserved hole (6); the outer wall of the anti-deviation tube (1) is slidably matched with the inner wall of the advance drilling reserved hole (6); one end of the anti-deviation tube (1) is arranged outside the tunnel boring machine support shield (5); the other end of the anti-deviation tube (1) passes through the advance drilling reserved hole (6) and is fixedly connected to the telescopic end of the length adjustment device (2); and the fixed end of the length adjustment device (2) is fixedly connected to the tunnel boring machine support shield (5).

4. The advance drilling anti-deviation device according to claim 3, characterized in that: The advance drilling rig (3) is fixedly arranged inside the tunnel boring machine support shield (5), the power output end of the drilling rig (3) is fixedly connected to a drill rod (4), the drill rod (4) is arranged in the anti-deviation tube (1), and the length of the drill rod (4) is greater than the length of the anti-deviation tube (1).

5. The advance drilling anti-deviation device according to claim 3, characterized in that: The length adjustment device (2) comprises a connecting pipe (21) and a first flange (22); the connecting pipe (21) is arranged inside the tunnel boring machine support shield (5); the connecting pipe (21) and the first flange (22) are coaxially arranged with the advance drilling reserved hole (6); the connecting pipe (21) is sleeved on the anti-deviation pipe (1); the connecting pipe (21) and the anti-deviation pipe (1) are slidably matched; one end of the connecting pipe (21) is fixedly connected to the end of the advance drilling reserved hole (6); and the other end of the connecting pipe (21) is fixedly connected to the first flange (22); The anti-deviation pipe (1) is arranged inside the tunnel boring machine support shield (5) and is fixedly provided with a second flange (11) at one end thereof. The second flange (11) is connected to the first flange (22) via a plurality of adjustment bolts (12).

6. The advance drilling anti-deviation device according to claim 1, characterized in that: The anti-drifting tube (1) and the drill rod (4) are clearance-matched.

7. The advance drilling anti-deviation device according to claim 1, characterized in that: The anti-deviation pipe (1) is fitted with the pre-drilled reserved hole (6).

8. The advance drilling anti-deviation device according to claim 5, characterized in that: The length of the anti-deviation pipe (1) is greater than the length between the first flange (22) and the outer wall of the tunnel boring machine support shield (5).

Images