Yielding anchor rod

Abstract

The utility model relates to the technical field of tunnel construction, in particular to a yielding anchor rod which comprises an anchor rod body, and a nut, a base plate and a sleeve are sequentially and detachably connected to the anchor rod body in the length direction of the anchor rod body. An external thread is arranged on the surface of the anchor rod body, and an internal thread matched with the external thread is arranged in a pipe of the sleeve; the sleeve is located at the end of the anchor rod body, a grouting cap is arranged on one side of the sleeve and the end of the anchor rod body, a yielding anchorage device is arranged on the other side of the sleeve, and the face, facing the anchor rod body, of the yielding anchorage device is in closed contact with the anchor rod body. According to the yielding anchor rod, the sleeve detachably connected with the anchor rod body is arranged at one end of the anchor rod body, so that an anchor hole supporting effect is achieved, then the anchor rod body is inserted, the specific position of the anchor rod body can be determined, and meanwhile displacement and angle deviation of the anchor rod body cannot be generated when cement mortar is poured.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a yield anchor rod. Background Art

[0002] During tunnel construction, underground structures often need to be supported, and anchor bolts are a common method. For areas with rock masses below ground, yielding anchor bolts are often used during tunnel construction to account for the forces exerted by rock mass deformation and fracture. These anchor bolts have a certain degree of deformation capacity, allowing them to generate a certain degree of yielding force when the surrounding rock deforms, thereby relieving surrounding rock stress. Typically, a yielding anchor bolt consists of a bolt body, a tray, and a nut, with the bolt body often made of steel or high-strength polymer materials.

[0003] During the construction of a yield anchor, the process sequence is as follows: measurement and positioning → hole making → hole cleaning → rod insertion → grouting → locking → inspection, thus completing the construction of a yield anchor. Grouting is the injection of cement mortar, the purpose of which is to fill the gap between the yield anchor and the rock mass, thereby increasing the stress of the yield anchor. However, for ordinary yield anchors, grouting needs to be poured from both sides of the anchor body, and the angle of the anchor body must be maintained during grouting. This is difficult to operate during construction and can easily cause the angle of the anchor body to shift, affecting the subsequent construction progress and increasing the difficulty of subsequent construction. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a pressure-yielding anchor rod in view of the deficiencies in the above-mentioned prior art, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a pressure anchor rod, comprising an anchor rod body, wherein the anchor rod body is detachably connected with a nut, a pad and a sleeve in sequence along the length direction thereof;

[0006] The surface of the anchor rod body is provided with an external thread, and the inside of the casing is provided with an internal thread matching the external thread;

[0007] The sleeve is located at the end of the anchor body, a grouting cap is provided on one side of the sleeve and the end of the anchor body, and a pressure-releasing anchor is provided on the other side of the sleeve. The pressure-releasing anchor is in airtight contact with one side of the anchor body.

[0008] Furthermore, the yield anchor is also provided with a retreat-stop wing, and the projection of the retreat-stop wing along the length direction of the anchor body is larger than the projection of the yield anchor along the length direction of the anchor body.

[0009] Furthermore, the opening of the anti-retraction wing faces the direction of the upper pad of the anchor body.

[0010] Furthermore, a plurality of holes are evenly arranged on the tube wall of the sleeve, and each of the holes passes through the tube wall of the sleeve.

[0011] Furthermore, the anchor rod body is a hollow tube body, and both ends of the anchor rod body are respectively connected to the outside.

[0012] Furthermore, the portion of the anchor rod body located inside the casing is provided with a plurality of meshes, and a plurality of holes are evenly arranged on the wall of the casing, and each of the holes passes through the wall of the casing.

[0013] Furthermore, the edges of the backing plate are respectively provided with a plurality of through holes, and the through holes are used to pass bolts.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The utility model provides a pressure anchor rod, which plays a supporting role in the anchor hole by arranging a sleeve detachably connected to the anchor rod body at one end of the anchor rod body. Then, the anchor rod body can be inserted to determine the specific position of the anchor rod body, and at the same time, the displacement and angle deviation of the anchor rod body will not occur when pouring cement mortar.

[0016] The utility model provides a yield anchor rod. By arranging anti-retraction wings on the yield anchor, the anti-retraction wings can prevent the anchor rod from slipping out of the anchor hole when the anchor rod is used as support in subsequent use, thereby ensuring support safety.

[0017] The utility model provides a pressure anchor rod, which is provided with a plurality of through holes on the anchor rod body and the sleeve. When pouring cement mortar, cement mortar can be poured into the anchor rod and its surrounding areas in all directions through the through holes, thereby ensuring that the gaps in the anchor hole are completely filled with cement mortar, ensuring the stability of the anchor rod and ensuring the safety of support.

[0018] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model provides a schematic diagram of the overall structure of the pressure anchor rod.

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0021] Figure 3 for Figure 1 Enlarged view of point B in the middle.

[0022] Description of the accompanying drawings:

[0023] 1. Anchor rod body; 2. Retaining feather; 3. Grouting cap; 4. Casing; 5. Pressure anchor; 6. Nut; 7. Pad; 8. Through hole. DETAILED DESCRIPTION

[0024] like Figure 1-3 As shown, the utility model provides a pressure anchor rod, comprising an anchor rod body 1, wherein the anchor rod body 1 is detachably connected with a nut 6, a pad 7 and a sleeve 4 in sequence along its length direction;

[0025] The surface of the anchor body 1 is provided with an external thread, and the inside of the sleeve 4 is provided with an internal thread matching the external thread;

[0026] The sleeve 4 is located at the end of the anchor body 1, and a grouting cap 3 is provided on one side of the sleeve 4 and the end of the anchor body 1, and a pressure-releasing anchor 5 is provided on the other side of the sleeve 4. The pressure-releasing anchor 5 is in airtight contact with the anchor body 1 on one side facing the anchor body 1.

[0027] During construction, the rock mass is first drilled by a drilling rig to obtain an anchor hole. At this time, the pressure anchor rod provided by the present invention is inserted into the anchor hole so that the casing 4 is located at the bottom of the anchor hole. At this time, cement mortar is poured along the anchor rod body 1 so that the cement mortar is flush with the hole surface of the anchor hole. Then, the pad 7 is fixed by the nut 6 to close the hole surface of the anchor hole.

[0028] Therefore, the utility model provides a sleeve detachably connected to the anchor rod body at one end of the anchor rod body, thereby playing a supporting role in the anchor hole. The anchor rod body is then inserted to determine the specific position of the anchor rod body. At the same time, no displacement or angular deviation of the anchor rod body will occur when pouring cement mortar.

[0029] In the present invention, the yield anchor 5 is further provided with a backing-stop wing 2, the projection of the backing-stop wing 2 along the length direction of the anchor rod 1 being larger than the projection of the yield anchor 5 along the length direction of the anchor rod 1. The opening of the backing-stop wing 2 faces the direction of the backing plate 7 on the anchor rod 1. By providing the backing-stop wing on the yield anchor, the present invention can prevent the anchor rod from slipping out of the anchor hole when the anchor rod is used as support in subsequent use, thereby ensuring support safety.

[0030] At the same time, the wall of the sleeve 4 of the present invention is evenly provided with a plurality of holes, each of which penetrates the wall of the sleeve 4. Since the projection of the retaining wings 2 along the length direction of the anchor body 1 is larger than the projection of the pressure anchor 5 along the length direction of the anchor body 1, during pouring, cement mortar is required to fill the gaps near the retaining wings 2 so that the filling is uniform.

[0031] In the present invention, the anchor rod body 1 is a hollow tube body, and both ends of the anchor rod body 1 are connected to the outside world. The portion of the anchor rod body 1 located inside the casing 4 has a plurality of mesh holes, and the wall of the casing 4 is evenly provided with a plurality of holes, each of which penetrates the wall of the casing 4. The present invention provides a plurality of through holes on the anchor rod body and the casing, so that when pouring cement mortar, cement mortar can be poured into the anchor rod and its surroundings in all directions through the through holes, thereby ensuring that all gaps in the anchor hole are filled with cement mortar, ensuring the stability of the anchor rod, and ensuring the safety of the support.

[0032] In the present invention, the edges of the pad 7 are respectively provided with a plurality of through holes 8, and the through holes 8 are used to pass bolts. The pad 7 is fixed more firmly by the bolts, so that the safety of the anchor support is improved.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A yield anchor, characterized in that: The anchor rod body (1) comprises an anchor rod body (1), wherein the anchor rod body (1) is detachably connected to a nut (6), a backing plate (7) and a sleeve (4) in sequence along its length direction; The surface of the anchor rod body (1) is provided with an external thread, and the inside of the sleeve (4) is provided with an internal thread matching the external thread; The sleeve (4) is located at the end of the anchor rod body (1), a grouting cap (3) is provided on one side of the sleeve (4) and the end of the anchor rod body (1), and a pressure-releasing anchor (5) is provided on the other side of the sleeve (4), and the pressure-releasing anchor (5) is in airtight contact with the anchor rod body (1) on one side facing the anchor rod body (1).

2. A pressure-releasing anchor rod according to claim 1, characterized in that: The pressure-releasing anchor (5) is further provided with a stop wing (2), and the projection of the stop wing (2) along the length direction of the anchor rod body (1) is larger than the projection of the pressure-releasing anchor (5) along the length direction of the anchor rod body (1).

3. A pressure-releasing anchor rod according to claim 2, characterized in that: The opening of the anti-retraction wing (2) faces the direction of the upper pad (7) of the anchor rod body (1).

4. A pressure-releasing anchor rod according to claim 2, characterized in that: A plurality of holes are evenly arranged on the tube wall of the sleeve (4), and each of the holes passes through the tube wall of the sleeve (4).

5. A pressure-releasing anchor rod according to claim 1, characterized in that: The anchor rod body (1) is a hollow tube body, and both ends of the anchor rod body (1) are respectively connected to the outside world.

6. A pressure-releasing anchor rod according to claim 5, characterized in that: The portion of the anchor rod body (1) located inside the casing (4) is provided with a plurality of meshes, and a plurality of holes are evenly arranged on the wall of the casing (4), and each of the holes passes through the wall of the casing (4).

7. A pressure-releasing anchor rod according to claim 1, characterized in that: The edges of the backing plate (7) are respectively provided with a plurality of through holes (8), and the through holes (8) are used for passing bolts.

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