Construction tool capable of adjusting drilling angle of tunnel feet-lock anchor pipe

Abstract

The utility model discloses a construction tool capable of adjusting the drilling angle of a tunnel feet-lock anchor pipe, which belongs to the technical field of tunnel primary support construction and comprises angle control mechanisms used for being respectively clamped on two flange plates on the same side of a steel arch, and each angle control mechanism is composed of a pair of L-shaped fixing clamping plates. The pair of fixing clamping plates is connected in a back-to-back mode through at least two sets of fastening bolts, and the pair of fixing clamping plates are provided with corresponding C-shaped notches which are used for allowing a rock drill rod to penetrate through on the outer sides, attached to the transverse plate of the flange plate and deviating from the steel arch frame, of the pair of fixing clamping plates. By applying the construction tool, the drilling angle of the locking anchor pipe is effectively ensured, and meanwhile the drilling angle range of the angle of the locking anchor pipe can be adjusted to be 30-60 degrees according to different geologies.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of tunnel initial support construction, provide a kind of construction tooling of adjustable tunnel lock foot anchor pipe drilling angle. BACKGROUND

[0002] At present, lock foot anchor pipe has been widely applied in tunnel construction, and its structure is simple, economical and applicable, saves manpower and material resources, is convenient for construction and can greatly improve work efficiency. The lock foot in the tunnel refers to the anchor pipe that is punched into the arch foot at a certain angle after the steel support is erected after the upper step excavation is completed, and the anchor pipe is welded with the steel frame. Its main role is to limit the rigid displacement of steel support as much as possible, bear tensile and shear effect, make it bear the pressure caused by surrounding rock deformation as soon as possible, ensure the stability of tunnel in initial stage, and directly determine whether the lock foot anchor pipe can lock the steel frame, avoid the sinking and longitudinal convergence deformation of steel frame, so the drilling angle of lock foot anchor pipe is particularly important, so reasonable angle is not only beneficial to limit the deformation of surrounding rock, but also beneficial to exert the bearing capacity of supporting structure. However, lock foot anchor pipe is mostly made by artificial cooperation with air gun for drilling, and in actual construction process, the drilling angle is controlled by the experience of construction personnel. Due to various factors, the drilling angle of lock foot anchor pipe is difficult to control, which leads to angle deviation and greatly weakens the effect of lock foot anchor pipe. Therefore, a construction tooling capable of accurately controlling drilling angle and adapting to different geological conditions is urgently needed. CONTENT OF UTILITY MODEL

[0003] Therefore, the utility model aims at providing a kind of construction tooling of adjustable tunnel lock foot anchor pipe drilling angle, to solve the problem of inaccurate drilling angle control and dependence on artificial experience of existing lock foot anchor pipe.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] The utility model provides a construction frock of adjustable tunnel lock foot anchor pipe drilling angle, including angle control mechanism for respectively clamping on two wing plates of steel arch frame same side, single angle control mechanism is constituted by a pair of L type fixed clamping plate, and a pair of fixed clamping plate is connected with back -to -back type through at least two groups of fastening bolt, and a pair of fixed clamping plate is set up with corresponding and is used for rock drill rod to pass through and is C type's slot on the transverse plate of fitting in the outer side of steel arch frame and turns away from, adopts above -mentioned scheme, this construction frock has: adjustability, that is, realizes angle adjustment through the misregistration distance between two angle control mechanisms, so that construction personnel can flexibly adjust drilling angle according to actual needs. Stability, that is, the design of L type fixed clamping plate and the combination of fastening bolt form back -to -back type connecting structure, ensure the stability under high -strength construction condition, avoid the angle deviation caused by external force. Simplicity, that is, the design of C type slot makes rock drill rod can pass through conveniently, simplifies the operation process, improves construction efficiency.

[0006] Preferably, the fixed clamping plate is made of angle steel, and the screw rod of the fastening bolt is provided with a lock nut at both ends. The use of the lock nut further enhances the reliability of the connection.

[0007] The utility model also provides another construction frock of adjustable tunnel lock foot anchor pipe drilling angle, including angle control mechanism for respectively clamping on two wing plates of steel arch frame same side, single angle control mechanism includes a L type fixed clamping plate, and the fixed clamping plate is equipped with a inverted L type clamping plate on the transverse plate of fitting in the inner side of steel arch frame and is close to, make the fixed clamping plate and clamping plate form a clamping groove for clamping the wing plate between them;The fixed clamping plate is provided with at least one draw hook rod for penetrating the vertical plate and can hook the other side of the wing plate on the vertical plate perpendicular to the wing plate, and the draw hook rod is provided with a locking nut for cooperating with the vertical plate. When the fixed clamping plate and the clamping plate are clamped on the wing plate, the clamping groove formed can tightly fix the wing plate, preventing displacement caused by vibration or external force during construction. The draw hook rod provides additional fixing force by penetrating the vertical plate and hooking the other side of the wing plate. The locking nut ensures the fixation of the draw hook rod, further enhancing the clamping effect.

[0008] Preferably, the clamping plate is provided with at least one locking screw for abutting against the wing plate. In this way, the locking screw abuts against the wing plate, enhancing the contact force between the clamping plate and the wing plate, thereby improving the stability of clamping. This design can effectively prevent clamping loosening caused by vibration or other external forces during drilling.

[0009] Preferably, the fixed clamping plate and the clamping plate are both made of angle steel. Angle steel has strong bending and torsional resistance, and can effectively clamp the wing plate of the steel arch frame.

[0010] Preferably, anti-skid teeth are additionally arranged on the contact surface of the fixed clamping plate and / or the clamping plate which is in contact with the flange plate. In this way, the anti-skid teeth can effectively prevent the loosening of the clamping caused by vibration or external force during construction by increasing the friction between the contact surfaces. This design ensures that the fixed clamping plate and the clamping plate can more firmly clamp the flange plate when in contact, thereby improving the stability of the overall structure.

[0011] Preferably, the two angle control mechanisms are arranged in a staggered manner in the vertical direction of the steel arch, and the staggered height is determined according to the horizontal distance between the two flange plates and the drilling angle of the rock drill rod. In this way, by arranging the two angle control mechanisms in a staggered manner, the construction personnel can reasonably set the drilling angle according to the drilling angle of the rock drill rod, thereby ensuring that the drilling direction is consistent with the required control angle.

[0012] The adjustable tunnel lock foot anchor pipe drilling angle construction tool has the advantages of simple structure, strong operability, turnover use, low cost, convenient processing, good practical effect, etc.

[0013] Other advantages, objects and features of the present application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following specification or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by the methods and compositions particularly pointed out in the written description and claims hereof. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to make the purpose, technical scheme and advantages of the present application clearer, the following will make a preferred detailed description of the present application combined with the drawings, in which:

[0015] Figure 1 Figure 1 is a perspective view of an embodiment of the adjustable tunnel lock foot anchor pipe drilling angle construction tool of the present application;

[0016] Figure 2 Figure 2 is a front view of the angle adjustment of the adjustable tunnel lock foot anchor pipe drilling angle construction tool of the present application; Figure 1

[0017] Figure 3 Figure 3 is a perspective view of another embodiment of the adjustable tunnel lock foot anchor pipe drilling angle construction tool of the present application;

[0018] Figure 4 Figure 4 is a fixed clamping plate structure diagram of the adjustable tunnel lock foot anchor pipe drilling angle construction tool of the present application; Figure 3

[0019] ​​Attached reference numerals: 1-Fixed clamping plate, 2-Slot, 3-Fasting bolt, 4-Rock drill rod, 5-Clamping plate, 6-Locking screw, 7-Hook rod, 8-Locking nut, 9-Steel arch frame. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0021] Example 1

[0022] like Figure 1 As shown in this embodiment, a construction tool for adjusting the drilling angle of a tunnel anchor pipe includes an angle control mechanism for clamping the two flange plates on the same side of the steel arch frame 9, ensuring the stability and adjustability of the drilling angle. Each angle control mechanism consists of a pair of L-shaped fixing plates 1, which can effectively clamp and fix the plates on the flange plates. The fixing plates 1 are made of └140*10 equilateral angle steel with a length of 20cm, which is easy to obtain and can provide sufficient rigidity. The pair of fixing plates 1 are fastened by at least two sets of fasteners. Bolt 3 is connected back-to-back to ensure structural stability. Anti-loosening nuts are fitted at both ends of the bolt 3 to prevent loosening due to vibration during construction. A 12mm diameter hole is drilled in the center of the angle steel for securing bolt 3. Bolt 3 is an M10 bolt with a 10cm length. A pair of fixing plates 1, on the horizontal plate attached to the flange plate and facing away from the steel arch 9, each have corresponding C-shaped slots 2 for the drill rod 4 of the rock drill to pass through, ensuring drilling accuracy and smoothness. Using this adjustable construction tooling significantly improves the drilling accuracy of the tunnel anchor pipe, ensures stability during construction, reduces errors caused by human experience, and thus improves the safety and efficiency of tunnel construction. Furthermore, the tooling is simple and easy to operate, adaptable to drilling needs under different geological conditions.

[0023] like Figure 2 As shown, the two angle control mechanisms are staggered vertically on the steel arch frame 9, and the stagger height is determined by the horizontal distance between the two flange plates and the drilling angle of the rock drill rod 4. Taking 45° as an example, the I-beams used in the initial support steel arch frame 9 are I20 I-beams with a flange plate spacing of 20cm. The angle control mechanism on the side closest to the surrounding rock is offset downwards by 20cm. Drilling at this angle can establish a 45° control angle.

[0024] Before construction, the geological conditions of the tunnel are surveyed to determine the specific location and angle requirements of the boreholes. Adjustable construction tools and rock drills are prepared, ensuring all tools and materials are in good condition. First, the two pairs of fixed clamps 1 of the two sets of angle control mechanisms are fixed to the two side flanges of the steel arch frame 9, and secured by tightening the fastening bolts 3. That is, one pair of L-shaped fixed clamps 1 is positioned on one side flange of the steel arch frame 9, ensuring the bottom of the fixed clamp 1 fits tightly against the flange. Then, the angle of the clamps is adjusted as needed. Finally, the other pair of fixed clamps 1 is fixed to the other side flange using the fastening bolts, ensuring a stable connection between the fixed clamps 1 and the steel arch frame 9. Note that anti-loosening nuts are used to ensure that the clamps do not loosen during construction. According to construction requirements, the drilling angle is flexibly adjusted by changing the distance and relative position between the two sets of angle control mechanisms. One set of angle control mechanisms, closer to the tunnel centerline, is fixed at the designed anchor pipe placement position, while the other set, closer to the surrounding rock, is fixed at a lower downward offset position relative to the first set. The installation positions can be calculated. Then, the rock drill rod 4 is passed through the C-shaped slot 2 on the outside of the fixed clamping plate 1. After ensuring all equipment is securely connected and the drilling angle is correct, the rock drill is started for drilling operations. Construction personnel should monitor the drilling progress at all times to ensure that the drilling direction and depth meet the design requirements.

[0025] Example 2

[0026] For example Figures 3-4 As shown, another construction tool for adjusting the drilling angle of the tunnel anchor pipe mentioned in this embodiment includes an angle control mechanism for clamping the two flange plates on the same side of the steel arch frame 9. Each angle control mechanism includes an L-shaped fixing plate 1. The fixing plate 1 has an inverted L-shaped clamping plate 5 on the horizontal plate attached to the flange plate and close to the inner side of the steel arch frame 9, so that a clamping groove for clamping the flange plate is formed between the fixing plate 1 and the clamping plate 5. Both the fixing plate 1 and the clamping plate 5 are made of angle steel. Thus, the design of the fixing clamp 1 allows it to effectively clamp onto the flange plate, providing a stable foundation. The design of the holding plate 5, combined with the fixing clamp 1, forms a clamping groove for holding the flange plate, thereby improving the clamping effect and stability. The fixing clamp 1 has at least one hook rod 7 on a vertical plate perpendicular to the flange plate, which passes through the vertical plate and hooks onto the other side of the flange plate, further enhancing the clamping force. The hook rod 7 is also equipped with a locking nut 8 for engaging with the vertical plate to ensure that the hook rod does not loosen during use.

[0027] Before construction, the geological conditions of the tunnel are investigated to determine the specific position and angle requirements of the drilling. And it is confirmed that the construction tooling, rock drill and other related tools and materials are fully prepared and in good condition. The fixed clamping plate with a clamping plate is installed on the flange plate on both sides of the steel arch, that is, the L-shaped fixed clamping plate is attached to the flange plate of the steel arch, ensuring that the bottom is tightly attached, and the clamping groove formed by the inverted L-shaped clamping plate and the fixed clamping plate can firmly clamp the flange plate. Then the draw hook rod is inserted through the vertical plate part of the fixed clamping plate and hooked on the other side of the flange plate. The draw hook rod is fixed on the vertical plate using a locking nut to ensure that it does not loosen during construction. According to the construction requirements, the installation position of the upper and lower misalignment between the two sets of angle control mechanisms is adjusted to achieve flexible adjustment of the drilling angle. After ensuring that the fixed clamping plate, clamping plate and draw hook rod are firmly fixed and the drilling angle meets the design requirements, the drill rod of the rock drill is inserted through the C-shaped slot of the fixed clamping plate to ensure stable contact between the drill rod and the tooling. After ensuring that all equipment is firmly connected and the drilling angle is correct, the rock drill is started for drilling operation. The construction personnel should monitor the drilling process at all times to ensure that the drilling direction and depth meet the design requirements. The depth and angle of the drilling can also be checked periodically during the drilling process, and fine tuning can be performed as necessary. After the drilling is completed, the construction tooling and rock drill are removed, and the site is cleaned to ensure that no tools or materials are left behind. In this way, by adjusting the installation position of the fixed clamping plate and the fastening degree of the draw hook rod, the construction personnel can flexibly adjust the drilling angle to adapt to different construction requirements.

[0028] In this embodiment, at least one locking screw 6 for abutting against the flange plate is provided on the clamping plate 5. The design of the locking screw allows it to directly abut against the flange plate, providing additional fixing force to prevent displacement caused by external forces or vibrations.

[0029] In this embodiment, anti-slip teeth are added to the contact surface of the fixed clamping plate 1 and / or the clamping plate 5 that is attached to the flange plate. The design of the anti-slip teeth can significantly reduce the safety hazards caused by sliding, ensuring the safety of the construction.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and all should be covered within the scope of the claims of the present application.

Claims

1. A construction tool for adjusting the drilling angle of a tunnel lock foot anchor pipe, characterized in that, The angle control mechanism comprises a pair of L-shaped fixed clamping plates (1) which are connected back to back by at least two groups of fastening bolts (3), and each of the fixed clamping plates (1) is provided with a corresponding C-shaped notch (2) on the horizontal plate which is attached to the flange plate and faces away from the outer side of the steel arch (9) for the rock drill rod (4) to pass through.

2. The adjustable tunnel lock foot anchor hole angle construction tool according to claim 1, wherein, The fixed clamping plate (1) is made of angle steel, and the screw rod of the fastening bolt (3) is provided with a lock nut at both ends.

3. A construction tool for adjusting the drilling angle of a tunnel lock foot anchor pipe, characterized in that, The angle control mechanism comprises a pair of L-shaped fixed clamping plates (1) which are connected back to back by at least two groups of fastening bolts (3), and each of the fixed clamping plates (1) is provided with a corresponding C-shaped notch (2) on the horizontal plate which is attached to the flange plate and faces away from the outer side of the steel arch (9) for the rock drill rod (4) to pass through.

4. The adjustable tunnel lock foot anchor hole angle construction tool according to claim 3, wherein, The fixed clamping plate (1) is made of angle steel, and the screw rod of the fastening bolt (3) is provided with a lock nut at both ends.

5. The adjustable tunnel lock foot anchor hole angle construction tool according to claim 3, wherein, The angle control mechanism comprises a pair of L-shaped fixed clamping plates (1) which are connected back to back by at least two groups of fastening bolts (3), and each of the fixed clamping plates (1) is provided with a corresponding C-shaped notch (2) on the horizontal plate which is attached to the flange plate and faces away from the outer side of the steel arch (9) for the rock drill rod (4) to pass through.

6. The adjustable tunnel lock foot anchor hole angle construction tool according to claim 3, wherein, The fixed clamping plate (1) is made of angle steel, and the screw rod of the fastening bolt (3) is provided with a lock nut at both ends.

7. The adjustable tunnel lock foot anchor hole angle construction kit according to any one of claims 1-6, characterized in that, The angle control mechanism comprises a pair of L-shaped fixed clamping plates (1) which are connected back to back by at least two groups of fastening bolts (3), and each of the fixed clamping plates (1) is provided with a corresponding C-shaped notch (2) on the horizontal plate which is attached to the flange plate and faces away from the outer side of the steel arch (9) for the rock drill rod (4) to pass through. The fixed clamping plate (1) is made of angle steel, and the screw rod of the fastening bolt (3) is provided with a lock nut at both ends. The angle control mechanism comprises a pair of L-shaped fixed clamping plates (1) which are connected back to back by at least two groups of fastening bolts (3), and each of the fixed clamping plates (1) is provided with a corresponding C-shaped notch (2) on the horizontal plate which is attached to the flange plate and faces away from the outer side of the steel arch (9) for the rock drill rod (4) to pass through. The fixed clamping plate (1) is made of angle steel, and the screw rod of the fastening bolt (3) is provided with a lock nut at both ends.

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