Device for controlling drilling angle and length of advanced conduit

Abstract

The utility model relates to the technical field of tunnel advance support control, in particular to a device for controlling the drilling angle and length of an advance guide pipe, which comprises a rock drill for driving the guide pipe into a tunnel, a detachable drill rod is connected between the rock drill and the guide pipe, and an adjusting mechanism for adjusting the insertion angle of the guide pipe is attached to one side of the guide pipe. The adjusting mechanism is fixed to the bottom of the side, away from the tunnel, of the steel arch. During use, the drill rod is arranged between the rock drill and the guide pipe, the length of the front end of the rock drill is increased through the drill rod, the clamping influence of adjacent steel arches on the rock drill is overcome, and tunnel advance support failure and material waste are avoided; the adjusting mechanism is arranged at the bottom of the steel arch, after the adjusting mechanism is determined and adjusted, one side of the guide pipe is attached to the adjusting mechanism, a guiding effect is provided for tunnel advance guide pipe driving, and therefore it is guaranteed that the angle of the advance guide pipe meets the design requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of advanced support control for tunnels, and specifically, to a device for controlling the drilling angle and length of advanced ducts. Background Technique

[0002] In recent years, due to the vigorous development of highway construction in China, unprecedented opportunities and challenges have been brought to the technical development in the fields of tunnels and underground engineering in China. During the actual construction process of tunnel projects, advanced ducts in tunnels are an essential link in construction. Especially in the western region, the rock formations of tunnels are generally less stable, and higher requirements are imposed on advanced support. However, at present, manual pneumatic rock drills are still widely used in most areas. When facing the traditional manual rock drill excavation, in view of the problems of on-site primary support design and construction equipment, the control accuracy of the length and angle of advanced ducts is not good, which easily causes the failure of the advanced support system and brings great challenges to engineering construction.

[0003] When using a traditional manual rock drill to drive advanced ducts in tunnels, due to the structure of the rock drill itself and the too small spacing of steel arch frames, and the required external insertion angle of the advanced duct in the tunnel is 5 - 12°, the rock drill is affected by the external insertion angle of the duct and the clamping of adjacent steel arch frames, resulting in the inability to drive the advanced duct in place, and the length and angle of the duct cannot be effectively guaranteed. In addition, the traditional process is that the angle of the advanced pipeline on the construction site is random, and the part where the duct cannot be inserted is cut on site, and the effective length of the duct cannot be guaranteed.

[0004] In view of this, we propose a device for controlling the drilling angle and length of advanced ducts. Content of the Utility Model

[0005] The purpose of the utility model is to provide a device for controlling the drilling angle and length of advanced ducts to solve the problems raised in the above background technique.

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

[0007] A device for controlling the drilling angle and length of advanced ducts includes a rock drill for driving the duct into the tunnel. A detachable drill rod is connected between the rock drill and the duct. An adjusting mechanism for adjusting the insertion angle of the duct is attached to one side of the duct, and the adjusting mechanism is fixed to the bottom of the steel arch frame on the side away from the tunnel.

[0008] As a further solution of the utility model: One end of the drill rod is provided with an external hexagonal end head inserted and fixed to the output end of the rock drill, the other end is provided with an internal hexagonal end head inserted and fixed to the duct, and the drill rod is symmetrically provided with retaining bars for limiting.

[0009] As a further solution of the utility model: The adjusting mechanism includes two fixing plates, and the two fixing plates are clamped and fixed to the bottom of one side of the steel arch by fixing bolts.

[0010] As a further solution of the utility model: An adjusting bolt is provided on one side of the fixing bolt, and a guiding head for guiding the moving direction of the catheter is provided at one end of the adjusting bolt.

[0011] As a further solution of the utility model, the steel arch includes two arc-shaped I-beams, and the two I-beams are fixed by connecting steel bars and positioning anchor bolts.

[0012] As a further solution of the utility model: The I-beam on the side where the steel arch fits the tunnel is equidistantly provided with through holes, the diameter of the through holes is A, and the range of A is 50mm ≤ A ≤ 55mm, and the diameter of the catheter is B, and the range of B is 40mm ≤ B ≤ 45mm.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. In the device for controlling the drilling angle and length of the advanced catheter, by arranging a drill pipe between the rock drill and the catheter, and using the drill pipe to extend the length of the front end of the rock drill, the clamping effect of the adjacent steel arch on the rock drill is overcome, and the failure of the tunnel advanced support and the waste of materials are avoided.

[0015] 2. In the device for controlling the drilling angle and length of the advanced catheter, by arranging an adjusting mechanism at the bottom of the steel arch, after determining and adjusting the adjusting mechanism, one side of the catheter fits the adjusting mechanism, providing a guiding effect for the driving of the tunnel advanced catheter, so as to ensure that the angle of the advanced catheter meets the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall structural schematic diagram of this solution;

[0017] Figure 2 is the structural schematic diagram of the drill pipe of this solution;

[0018] Figure 3 is the schematic diagram of the adjusting mechanism of this solution.

[0019] The meanings of each label in the figure are as follows:

[0020] 100. Drill pipe; 101. Outer hexagonal end; 102. Stop bar; 103. Inner hexagonal end;

[0021] 200. Adjusting mechanism; 201. Fixing plate; 202. Fixing bolt; 203. Adjusting bolt; 204. Guiding head. DETAILED DESCRIPTION OF THE INVENTION

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] Embodiment

[0024] As Figure 1 shown, this embodiment provides a device for controlling the drilling angle and length of the leading conduit, which includes a rock drill for driving the conduit into the tunnel. Considering the influence of the adjacent steel arch on the positioning of the rock drill, a detachable drill rod 100 is connected between the rock drill and the conduit. By means of the drill rod 100, the front section length of the rock drill is extended. Considering that the leading external insertion angle of the conduit is relatively small, an adjusting mechanism 200 for adjusting the insertion angle of the conduit is attached to one side of the conduit. The adjusting mechanism 200 is fixed to the bottom of the steel arch on the side away from the tunnel. By adjusting the adjusting mechanism 200, the driving angle of the conduit is limited, avoiding the situation of too small leading external insertion angle.

[0025] The improvement of this embodiment lies in: by arranging the drill rod 100 between the rock drill and the conduit, the front end length of the rock drill is lengthened by using the drill rod 100, overcoming the influence of the adjacent steel arch on the positioning of the rock drill, avoiding the failure of the tunnel leading support and the waste of materials; by arranging the adjusting mechanism 200 at the bottom of the steel arch, after determining and adjusting the adjusting mechanism 200, one side of the conduit is attached to the adjusting mechanism 200, providing a guiding effect for the driving of the tunnel leading conduit, so as to ensure that the angle of the leading conduit meets the design requirements.

[0026] As Figure 2 shown, in order to facilitate the fixation of both ends of the drill rod 100 to the rock drill and the conduit respectively, one end of the drill rod 100 is provided with an external hexagonal end 101, and the other end is provided with an internal hexagonal end 103. The drill rod 100 can be installed and fixed by inserting and fixing the external hexagonal end 101 to the output end of the rock drill and the internal hexagonal end 103 to the conduit. At the same time, in order to prevent the external hexagonal end 101 from damaging the output end of the rock drill when the worker applies force, the drill rod 100 is symmetrically provided with limiting bars 102. By means of the limiting bars 102, the contact surface between the rock drill and the drill rod 100 is increased, avoiding damage to the rock drill;

[0027] As Figure 3 shown, considering the convenient installation and fixation of the adjusting mechanism 200, the adjusting mechanism 200 includes two fixing plates 201. The two fixing plates 201 are clamped at the bottom of one side of the steel arch, and the two fixing plates 201 are clamped and fixed to the steel arch by rotating the fixing bolts 202.

[0028] Meanwhile, to facilitate the adjustment of the driving angle of the conduit, an adjusting bolt 203 is provided on one side of the fixing bolt 202. By rotating the adjusting bolt 203, the length of the adjusting bolt 203 on one side of the fixing plate 201 is adjusted, thereby limiting the driving angle of the conduit. At the same time, the length from the nut of the adjusting bolt 203 to the fixing plate 201 is denoted as L. Considering that the nut of the traditional adjusting bolt 203 is relatively flat, it is easy to separate during the superconducting construction process after the conduit fits with the nut. Therefore, a guiding head 204 for guiding the moving direction of the conduit is provided at one end of the adjusting bolt 203.

[0029] Furthermore, the structure of the steel arch is disclosed. The steel arch includes two arc-shaped I-beams. The tops of the two I-beams are connected by steel plates. The two I-beams are fixed by connecting steel bars and positioning bolts. The vertical axial distance between the two I-beams is H.

[0030] On the side of the I-beam where the steel arch fits the tunnel, through holes are evenly arranged. The diameter of the through holes is A, and the range of A is 50mm ≤ A ≤ 55mm. Considering that the conduit needs to be inserted obliquely, the diameter of the conduit is B, and the range of B is 40mm ≤ B ≤ 45mm.

[0031] The inclination angle of the conduit is denoted as β, and β = arctan(L / H).

[0032] In summary, the working principle of this solution is as follows:

[0033] Investigate the primary support parameters of the tunnel, clarify the advance external insertion angle of the tunnel, measure the vertical axial distance between the two I-beams and record it as H. Determine the structural dimensions of the device according to the corresponding parameters, prepare the corresponding materials. After the on-site steel arch erection is completed and the preparatory work for the driving of the advance conduit is in place, clamp the two fixing plates 201 at the bottom on one side of the steel arch. By rotating the fixing bolt 202, the two fixing plates 201 are clamped to fix the steel arch. Rotate the adjusting bolt 203 according to the parameters, adjust the length of the adjusting bolt 203 and record it as L. According to β = arctan(L / H), calculate the inclination angle β of the conduit. After meeting the requirement of 5° ≤ β ≤ 12°, insert and fix the external hexagonal end 101 of the drill rod 100 to the output end of the rock drill, insert and fix the internal hexagonal end 103 to the conduit, and pass one end of the conduit through the through hole on the side of the steel arch close to the tunnel. One side of the conduit fits the guiding head 204 of the adjusting bolt 203. Start the rock drill, and the worker conducts the construction of the advance conduit.

[0034] Although this specification is described according to the embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0035] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent transformations made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A device for controlling the angle and length of a lead guide tube drilling, comprising a rock drill for driving the guide tube into a tunnel, characterized in that: A detachable drill rod (100) is connected between the rock drill and the guide tube, an adjustment mechanism (200) for adjusting the guide tube insertion angle is attached to one side of the guide tube, and the adjustment mechanism (200) is fixed to the bottom of the steel arch away from the tunnel.

2. The device for controlling the drilling angle and length of the leading catheter according to claim 1, characterized in that: One end of the drill rod (100) is provided with an external hexagonal end (101) plugged and fixed to the output end of the rock drill, and the other end is provided with an internal hexagonal end (103) plugged and fixed to the guide tube. The drill rod (100) is symmetrically provided with stop bars (102) for limiting.

3. The device for controlling the drilling angle and length of the leading catheter according to claim 1, characterized in that: The adjustment mechanism (200) comprises two fixing plates (201), and the two fixing plates (201) are clamped and fixed to the bottom of one side of the steel arch frame by fixing bolts (202).

4. The device for controlling the drilling angle and length of the leading catheter according to claim 3, characterized in that: An adjusting bolt (203) is provided on one side of the fixing bolt (202), and a guide head (204) for guiding the moving direction of the catheter is provided on one end of the adjusting bolt (203).

5. The device for controlling the drilling angle and length of the leading catheter according to claim 1, characterized in that: The steel arch frame comprises two arc-shaped I-beams, and the two I-beams are fixed by connecting steel bars and positioning anchor rods.

6. The device for controlling the drilling angle and length of the leading catheter according to claim 1, characterized in that: The I-beam on one side of the steel arch frame that fits the tunnel is provided with through holes at equal intervals, the diameter of the through holes is A, and the range of A is 50mm≤A≤55mm, and the diameter of the conduit is B, and the range of B is 40mm≤B≤45mm.

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