Angle control fixture for feet-lock bolt of small-section hydraulic tunnel

Abstract

The utility model discloses a small-section hydraulic tunnel feet-lock bolt angle control fixture which comprises angle steel, a butt joint rod piece and a guide pipe, the angle steel is conveniently fixed to I-steel of a steel arch, the butt joint rod piece is arranged to enhance the overall connection strength of the fixture and guarantee the structural stability during subsequent drilling, the guide pipe is fixedly connected with the angle steel, and the angle steel is fixedly connected with the guide pipe. The guide pipe corresponding to the drilling angle is arranged to guide subsequent drilling, so that during small-section tunnel construction, the drilling angle precision of the feet-lock bolt is improved, the angle of the feet-lock bolt is effectively guaranteed to meet the design requirement, the welding quality defect problem of the feet-lock bolt is reduced, and the construction process efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel locking anchor rod construction, and more specifically, to a small-section hydraulic tunnel locking anchor rod angle control fixture. Background Art

[0002] Due to the small excavation section and small construction space of small-section hydraulic tunnels, the on-site locking anchor bolt drilling angle accuracy is low, the locking anchor bolt fails to be fully welded to the I-beam, the welding quality of the locking anchor bolt is poor, and the on-site locking anchor bolt drilling is frequently reworked, resulting in slow construction speed and extended cycle time. In addition, due to the small construction space, the drilling equipment is directly set up on the bedrock surface, resulting in the inability to fix the angle of the locking anchor bolt during construction. Utility Model Content

[0003] The utility model aims to provide a small-section hydraulic tunnel locking foot anchor rod angle control fixture to solve the technical problem of the prior art that the drilling direction of the locking foot anchor rod is difficult to control and adjust.

[0004] In order to achieve these purposes and other advantages according to the utility model, a small-section hydraulic tunnel locking foot anchor rod angle control fixture is provided, which is installed on the I-beam at the corresponding position of the steel arch frame of the initial support surface of the tunnel, comprising:

[0005] Angle steels are arranged in pairs on both sides of the web of the I-beam in a direction parallel to the I-beam, with one inner side of each angle steel abutting against the lateral edge of the flange of the I-beam to form a lateral edge, and the other inner side surface is welded to the outer surface of the outer flange of the I-beam to form an outward edge;

[0006] The butt-jointed rod comprises a pair of butt-jointed nuts and bolts screwed on the pair of butt-jointed nuts, wherein the pair of butt-jointed nuts are respectively fixed on the outer edge of an angle steel along a coaxial direction perpendicular to the web of the I-beam;

[0007] A guide tube is welded and fixed on the outside of the lateral edge of each angle steel. The orientation of the guide tube is consistent with the design direction of the locking foot anchor rod at the corresponding position, and is used to guide the drilling direction after the drill rod of the locking foot anchor rod passes through.

[0008] Preferably, the bolt has a T-shaped head as a hand-held end for screwing the bolt.

[0009] Preferably, the butt joint rods are symmetrically arranged at upper and lower ends of a pair of the angle steels, and the guide tube is located between the pair of butt joint rods in the vertical direction.

[0010] Preferably, the bolt of the docking rod on the lower side has an external thread for connecting with a pair of docking nuts, and a pair of support members are also sleeved on the bolt, a threaded ring is provided in the middle of the support member, and is screwed onto the bolt through the threaded ring, and an inferior arc-shaped support ring is upwardly provided at one end of the support member facing the initial support surface, which is used to support and limit the guide tube on the corresponding side toward the I-beam, and limit nuts are symmetrically screwed on both sides of the support ring on the bolt to tighten the support member.

[0011] Preferably, a socket is provided at one end of the support member facing away from the primary support surface, and a latch is inserted into both sockets of a pair of support members.

[0012] The utility model includes at least the following beneficial effects: the utility model provides a small-section hydraulic tunnel locking anchor rod angle control fixture, which is convenient for fixing on the I-beam of the steel arch frame by using angle steel, and the connection strength of the fixture as a whole is strengthened and the structural stability during subsequent drilling is ensured by arranging docking rods, the guide tube is fixedly connected to the angle steel, and the guide tube corresponding to the drilling angle is arranged to guide the subsequent drilling, and during the construction of small-section tunnels, the drilling angle accuracy of the locking anchor rod is improved, effectively ensuring that the locking anchor rod angle meets the design requirements, reducing the problem of welding quality defects of the locking anchor rod, and accelerating the construction process efficiency.

[0013] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the main structural diagram of the utility model;

[0015] Figure 2 It is a side structural diagram of the utility model;

[0016] Explanation of the reference numerals in the drawings in the specification: 1. I-beam, 2. Outer edge, 3. Lateral edge, 4. Bolt, 5. Butt nut, 6. Guide tube, 7. T-shaped head, 8. Support member, 9. Threaded ring, 10. Support ring, 11. Limit nut, 12. Pin. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0018] In the description of the present invention, terms such as "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0019] like Figure 1 , Figure 2 As shown, the small-section hydraulic tunnel locking anchor rod angle control fixture of the utility model is installed on the I-beam 1 at the corresponding position of the steel arch frame of the initial support surface of the tunnel, and includes:

[0020] Angle steels are arranged in pairs on both sides of the web of the I-beam 1 in a direction parallel to the I-beam 1, with one inner side of each angle steel abutting against the lateral edge 3 of the flange of the I-beam 1 to form the lateral edge 3, and the other inner side surface is welded to the outer surface of the outer flange of the I-beam 1 to form the outward edge 2;

[0021] The butt-jointed rod comprises a pair of butt-jointed nuts 5 and bolts 4 screwed on the pair of butt-jointed nuts 5. The pair of butt-jointed nuts 5 are respectively fixed on the outer edge 2 of an angle steel along a coaxial direction perpendicular to the web of the I-beam 1;

[0022] A guide tube 6 is welded and fixedly arranged on the outside of the lateral edge 3 of each angle steel. The orientation of the guide tube 6 is consistent with the design direction of the locking foot anchor rod at the corresponding position, and is used to guide the drilling direction after the drill rod of the locking foot anchor rod passes through.

[0023] According to the actual construction conditions on site and the requirements of the drawing specifications, the locking foot anchor rod adopts the construction process of grouting first and then inserting the rod. The borehole diameter is 40mm, and the downward inclination angle of the borehole is 25 degrees. The angle control fixture of the locking foot anchor rod of the small-section hydraulic tunnel includes angle steel, docking rods, and guide pipe 6. The guide pipe 6 is a Φ50*3mm seamless steel pipe. The angle control fixture of the locking foot anchor rod of the small-section hydraulic tunnel is used as follows during construction:

[0024] (1) After the steel arch frame is installed, determine the location of the anchor bolts and mark them. For ease of explanation, the side facing the primary support surface of the tunnel is the front side, and the side facing away from the primary support surface is the rear side.

[0025] (2) Install the locking foot anchor angle control fixture at the marked position, first symmetrically weld the outer edges 2 of a pair of angle steels to the left and right sides of the wing plate on the rear side of the I-beam 1 at the marked position, then insert bolts 4 into a pair of butt nuts 5 to strengthen the fastening connection strength of the angle steel, then adjust the direction angle of the guide tube 6, tilt it downward by 25°, and then weld it to the lateral edge 3;

[0026] (3) The anchor rod drill rod passes through the Φ50*3mm seamless steel pipe, and the anchor rod can be set according to the designed angle;

[0027] (4) After drilling is completed, remove the fixture, grout the anchor hole first, and then insert the anchor.

[0028] The utility model discloses a small-section hydraulic tunnel locking anchor rod angle control fixture, which is convenient for fixing on the I-beam 1 of the steel arch frame by using angle steel, and strengthens the overall connection strength of the fixture and ensures the structural stability during subsequent drilling by arranging a butt rod, and the guide tube 6 is fixedly connected to the angle steel, and guides the subsequent drilling by arranging the guide tube 6 corresponding to the drilling angle, which improves the drilling angle accuracy of the locking anchor rod during the construction of the small-section tunnel, effectively ensures that the locking anchor rod angle meets the design requirements, reduces the welding quality defects of the locking anchor rod, and speeds up the construction process efficiency.

[0029] In another technical solution, Figure 1-2 As shown, the bolt 4 has a T-shaped head 7, which serves as a hand-held end for screwing the bolt 4, so as to facilitate fast screwing of the bolt 4 into a pair of butt nuts 5.

[0030] In another technical solution, Figure 1-2 As shown, the docking rods are symmetrically arranged at the upper and lower ends of a pair of the angle steels, and the guide tube 6 is vertically located between the pair of docking rods. The upper and lower ends of pairs of angle steels having a certain length are symmetrically fastened to further enhance the structural connection strength.

[0031] In another technical solution, Figure 1-2 As shown, the bolt 4 of the docking rod member on the lower side has an external thread for connecting with a pair of docking nuts 5, and a pair of support members 8 are also sleeved on the bolt 4, and a threaded ring 9 is provided in the middle of the support member 8, which is screwed on the bolt 4 through the threaded ring 9. An inferior arc-shaped support ring 10 is upwardly provided at one end of the support member 8 facing the initial support surface, which is used to support and limit the guide tube 6 on the corresponding side toward the I-beam 1, and limit nuts 11 are symmetrically screwed on both sides of the support ring 10 on the bolt 4 to tighten the support member 8.

[0032] Before screwing the bolt 4 into the butt nut 5, the support member 8 is screwed onto the bolt 4 through the threaded ring 9, rotated and moved to the desired approximate position, and the bolt 4 is then inserted into the butt nut 5. A pair of support members 8 are respectively located on the outside of the lateral edge 3 of the angle steel, and the support ring 10 can be set to an inferior arc segment of one-quarter to one-half the size of the circle where the outer side of the corresponding guide tube 6 is located, so that the support ring 10 can provide a certain support to the guide tube 6 on the corresponding side at the bottom, and limit the side of the guide tube 6 away from the lateral edge 3 laterally, so that the guide tube 6 fits the angle steel for welding operation. Of course, the corresponding position on the bolt 4 can also be marked in advance according to the angular position of the guide tube 6. In the subsequent drilling process, the support member 8 can also play a certain supporting role for the guide tube 6.

[0033] In another technical solution, Figure 1-2 As shown, a socket is provided at one end of the support member 8 facing away from the initial support surface, and a pin 12 is inserted into the two sockets of a pair of support members 8. After adjusting the horizontal position of the support member 8, the pin 12 is inserted, and then the position of the support member 8 is fixed by the limit nut 11, so that the guide tubes 6 on both sides can be supported and limited at the same angle.

[0034] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation scheme. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the drawings shown and described herein.

Claims

1. A small-section hydraulic tunnel anchor bolt angle control fixture, installed on the I-beam at the corresponding position of the steel arch frame of the tunnel primary support surface, characterized in that: include: Angle steels are arranged in pairs on both sides of the web of the I-beam in a direction parallel to the I-beam, with one inner side of each angle steel abutting against the lateral edge of the flange of the I-beam to form a lateral edge, and the other inner side surface is welded to the outer surface of the outer flange of the I-beam to form an outward edge; The butt-jointed rod comprises a pair of butt-jointed nuts and bolts screwed on the pair of butt-jointed nuts, wherein the pair of butt-jointed nuts are respectively fixed on the outer edge of an angle steel along a coaxial direction perpendicular to the web of the I-beam; A guide tube is welded and fixed on the outside of the lateral edge of each angle steel. The orientation of the guide tube is consistent with the design direction of the locking foot anchor rod at the corresponding position, and is used to guide the drilling direction after the drill rod of the locking foot anchor rod passes through.

2. The small-section hydraulic tunnel locking anchor rod angle control fixture according to claim 1, characterized in that: The bolt has a T-shaped head which serves as a hand-held end for screwing the bolt.

3. The small-section hydraulic tunnel locking anchor rod angle control fixture according to claim 1, characterized in that: The butt-jointing rods are symmetrically arranged at the upper and lower ends of a pair of angle steels, and the guide tube is located between the pair of butt-jointing rods in the vertical direction.

4. The small-section hydraulic tunnel locking anchor rod angle control fixture as claimed in claim 3, characterized in that: The bolt of the docking rod on the lower side has an external thread for connecting with a pair of docking nuts. A pair of support members are also sleeved on the bolt. A threaded ring is provided in the middle of the support member, which is screwed onto the bolt through the threaded ring. An arc-shaped support ring is provided upward at one end of the support member facing the initial support surface, which is used to support and limit the guide tube on the corresponding side toward the I-beam. Limit nuts are symmetrically screwed on both sides of the support ring on the bolt to tighten the support member.

5. The small-section hydraulic tunnel anchor bolt angle control fixture as claimed in claim 4, characterized in that: An inserting hole is arranged at one end of the supporting member which faces away from the primary supporting surface, and a latch is inserted into two inserting holes of a pair of supporting members.

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