CN211038693U

CN211038693U - NPR anchor rod

Info

Publication number: CN211038693U
Application number: CN201921859383.2U
Authority: CN
Inventors: 何满潮; 夏敏; 郭洪燕; 李洪超
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-07-17
Anticipated expiration: 2029-10-31
Also published as: JP2022549922A; US20220228487A1; EP3954862A4; EP3954862A1; WO2021082839A1; JP7274669B2; EP3954862B1

Abstract

The utility model discloses a NPR anchor rod, NPR anchor rod includes the body of rod, tray and tool to lock, the body of rod is NPR spiral reinforcement, the surface of NPR spiral reinforcement is provided with protruding many spiral ribs, spiral rib is the heliciform structure; the tray and the lock are directly sleeved at the tail part of the NPR spiral steel bar. The utility model discloses a NPR stock can solve the elongation that ordinary stock exists among the prior art effectively and hang down, can not satisfy the problem that the big deformation of country rock needs.

Description

NPR anchor rod

Technical Field

The utility model relates to a new material technical field is correlated with to the concrete particularly, relates to a NPR stock.

Background

In the prior art, in the coal mine roadway and tunnel support, the anchor rod is support equipment which is most widely applied and used. With the continuous deepening of the coal mining depth, the surrounding rock of the roadway often shows the characteristics of answer, such as: large deformation of soft rock, large deformation of rock burst, large deformation of impact, and large deformation of gas outburst. In the existing supporting anchor rod, the elongation rate of the anchor rod body is low, the anchor rod body cannot adapt to the nonlinear large deformation and damage characteristics of surrounding rock of a deep roadway, the yield strength of the anchor rod body is instantly reached under the action of impact load, the anchor rod is broken and fails, and the bearing protection capability is lost, so that the damage phenomena of repeated repair of the roadway, steel frame distortion, cracking of cast concrete and the like are caused.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an in provide a NPR stock to the percentage elongation that ordinary stock exists among the solution prior art is low, can not satisfy the problem that the big deformation of country rock needs.

In order to achieve the purpose, the utility model provides an NPR anchor rod, which comprises a rod body, a tray and a lock, wherein the rod body is an NPR spiral reinforcing steel bar, a plurality of raised spiral ribs are arranged on the outer surface of the NPR spiral reinforcing steel bar, and the spiral ribs are in a spiral structure; the tray and the lock are directly sleeved at the tail part of the NPR spiral steel bar.

Further, the tail of the NPR spiral reinforcement is not treated.

Furthermore, the yield strength of the NPR spiral steel bar is 800-.

Further, the nominal diameter of the NPR anchor rod is 14mm-26 mm.

Further, the tray is a metal butterfly tray.

Further, the lock comprises a metal locking plate and a locking sleeve which are matched with each other.

Further, the spiral rib extends along the axial direction of the NPR spiral reinforcing steel bar.

Further, the number of the spiral ribs is 3-6.

Further, a plurality of the spiral ribs are uniformly distributed along the circumferential direction of the NPR spiral reinforcing steel bar.

The utility model discloses a NPR stock can realize evenly extending (200mm-350 mm/meter) when tunnel country rock takes place to warp greatly to keep the operating resistance of basic stability, consequently the utility model discloses a NPR stock can absorb the energy of country rock through horizontal resistance, deformation greatly, with still having fine supporting effect in order to guarantee the stability in tunnel under the big deformation condition of country rock.

Drawings

Fig. 1 is a schematic structural view of an NPR anchor according to an embodiment of the present invention;

fig. 2 is a stress-strain curve schematic diagram of an NPR anchor rod according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific examples, which should not be construed as limiting the invention.

Referring to fig. 1 and 2, according to an embodiment of the present invention, a constant-resistance large-deformation NPR anchor rod is provided, the NPR anchor rod includes a rod body 1, a tray 2 and a lock 3, the rod body 1 is an NPR spiral steel bar, the outer surface of the NPR spiral steel bar is provided with a plurality of raised spiral ribs, and the spiral ribs are in a spiral structure; the tray 2 and the lockset 3 are directly sleeved at the tail part of the NPR spiral steel bar.

Preferably, the tail of the NPR rebar is untreated. If the tail of the NPR spiral steel bar is not subjected to any processing such as thread rolling and the like, the structure has the advantages that: avoid afterbody screw thread stress concentration to avoid appearing in the cracked condition of afterbody screw thread, promoted the percentage elongation of stock effectively.

In the present embodiment, the yield strength of the NPR spiral steel bar is 800-. The pole body maximum force >210KN, the elongation > 20%, the pole body anchoring force >200KN, the anchoring length >1m, the anchor lock bearing capacity >210KN, and the pallet bearing capacity >210 KN.

Preferably, the nominal diameter of the NPR bolt is 14mm-26 mm. As shown in fig. 1, the tray 2 is a metal butterfly tray. The lock 3 comprises a metal locking plate and a locking sleeve which are matched with each other. The tray 2 has a hole in the middle for the rod 1 to pass through. The metal locking plate is sleeved on the tail of the rod body and is combined with the lock sleeve to form the lock 3.

Wherein, the structure of the body of rod 1 is as follows: the spiral rib extends along the axial direction of the NPR spiral reinforcing steel bar. The number of the spiral ribs is 3-6. The plurality of spiral ribs are uniformly distributed along the circumferential direction of the NPR spiral steel bar.

The utility model discloses a NPR stock can realize the big deformation of constant resistance, and the utility model discloses an in the tunnel of NPR stock as supporting equipment, when tunnel country rock takes place certain deformation, the NPR stock is uniformly tensile thereupon, and deformation in the country rock can obtain the release, and in tensile big deformation, keeps more stable operating resistance always, has realized the stability in tunnel, has eliminated potential safety hazards such as roof fall, collapse.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

Of course, the above is a preferred embodiment of the present invention. It should be noted that, for a person skilled in the art, several modifications and decorations can be made without departing from the basic principle of the present invention, and these modifications and decorations are also considered to be within the scope of the present invention.

Claims

1. An NPR anchor rod comprises a rod body (1), a tray (2) and a lock (3), and is characterized in that,

the rod body (1) is an NPR spiral steel bar, a plurality of raised spiral ribs are arranged on the outer surface of the NPR spiral steel bar, and the spiral ribs are of a spiral structure;

the tray (2) and the lock (3) are directly sleeved at the tail part of the NPR spiral steel bar.

2. The NPR anchor of claim 1, wherein the tail of the NPR rebar is untreated.

3. The NPR anchor rod as claimed in claim 1, wherein the NPR spiral reinforcement has yield strength of 800-950MPa and tensile strength of 900-1050MPa, and the NPR spiral reinforcement deforms and displaces 200mm-350 mm/m.

4. The NPR bolt according to claim 1, wherein the nominal diameter of the NPR bolt is 14mm-26 mm.

5. The NPR anchor according to claim 1, wherein the tray (2) is a metal butterfly tray.

6. The NPR anchor according to claim 1, wherein the lock (3) comprises a cooperating metal locking plate and sleeve.

7. The NPR bolt according to claim 1, wherein the helical rib extends in an axial direction of the NPR helical reinforcement.

8. The NPR bolt according to claim 1, wherein the number of the spiral ribs is 3-6.

9. The NPR bolt according to claim 1, wherein a plurality of the spiral ribs are uniformly distributed along a circumferential direction of the NPR spiral reinforcement.