CN216405400U

CN216405400U - Multifunctional anchor rod structure

Info

Publication number: CN216405400U
Application number: CN202122415794.6U
Authority: CN
Inventors: 张军; 蔡虎宇; 黄志鹏
Original assignee: Changsha University of Science and Technology
Current assignee: Changsha University of Science and Technology
Priority date: 2021-10-08
Filing date: 2021-10-08
Publication date: 2022-04-29
Anticipated expiration: 2031-10-08

Abstract

The utility model relates to the technical field of anchor rods and grouting, in particular to a multifunctional anchor rod structure which comprises a plurality of pipe bodies connected with each other through threads, wherein each pipe body is formed by welding a plurality of short pipes and the outer walls of a plurality of ball bearings, the short pipes and the ball bearings are arranged in a staggered mode, a drill bit is arranged at the front end of the pipe body at the forefront end, a plurality of grouting holes are uniformly formed in the drill bit around an axis, and a plurality of grouting holes are uniformly arranged in the pipe wall of each short pipe around the axis of the pipe body. The utility model simplifies the anchor rod construction process and improves the anchor rod construction efficiency; the utility model can avoid the collapse of the drill hole of the sand gravel stratum; drilling and grouting to form rotary jet so as to reinforce the stratum around the anchor rod and improve the anchoring force; the anchor rod is convenient to apply prestress.

Description

Multifunctional anchor rod structure

Technical Field

The utility model relates to the technical field of anchor rods, in particular to a multifunctional anchor rod structure.

Background

The anchor rod is arranged in rock and soil or tunnel engineering, the construction process of firstly drilling, then installing the anchor rod and finally grouting is generally adopted, the process flow is more complicated, the efficiency is low, particularly when the stratum is sand gravel, the problem of hole wall collapse is frequently encountered in the drilling process, the wall protection sleeve needs to be drilled with the following pipe, in addition, for the saturated soft clay stratum, the anchoring failure often occurs due to lower shear strength, and the anchoring force of the anchor rod needs to be improved. Therefore, it is necessary to develop a multifunctional anchor rod setting method with high applicability.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the technical defects and provide an anchor rod structure integrating drilling, anchor rod arrangement, prestress application and rotary spraying.

The utility model provides a multi-functional stock structure, includes a plurality of bodys through threaded connection each other, and every body is formed by the outer wall welding of a plurality of nozzle stub and a plurality of ball bearing, nozzle stub and ball bearing are the setting of staggering mutually, and the front end of the body of foremost is equipped with the drill bit, evenly be equipped with a plurality of injected holes around the axis line on the drill bit, every also be equipped with a plurality of injected holes of evenly arranging around the axis of body on the pipe wall of nozzle stub.

Furthermore, the short pipe adopts a steel flower pipe with the outer diameter of phi 100 and 120 mm.

Further, the aperture size of the grouting holes is 6-8 mm.

Further, the distance between two adjacent ball bearings on each pipe body is 1-2 m.

The utility model has the advantages that: the anchor rod is novel in design, reasonable in structure and convenient to construct; the anchor rod construction process is simplified, and the anchor rod construction efficiency is improved; the utility model can avoid the collapse of the drill hole of the sand gravel stratum; drilling and grouting to form rotary jet so as to reinforce the stratum around the anchor rod and improve the anchoring force; the anchor rod is convenient to apply prestress.

Drawings

FIG. 1 is a schematic view of the multi-function anchor construction of the present invention;

FIG. 2 is a schematic illustration of a grouting arrangement of the multi-function anchor construction of the present invention;

FIG. 3 is a schematic illustration of a grouting rotary spray of the multi-functional anchor construction of the present invention;

FIG. 4 is a schematic view of the multi-functional anchor rod structure of the present invention with steel bars inserted after grouting;

fig. 5 is a schematic structural diagram of the torque driving apparatus of the present invention.

As shown in the figure: 1. a pipe body; 2. a ball bearing; 3. a drill bit; 4. grouting holes; 5. a base; 6. a reciprocating track; 7. a torque drive device; 8. a guide bracket; 9. a grouting pipe; 10. grouting pump; 11. reinforcing steel bars; 101. short pipes 701 and a mounting seat; 702. a torque motor; 703. a fixed cylinder; 704. a transmission assembly; 705. a bearing; 706. a rotating drum; 707. and (4) fastening clips.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides a multi-functional stock structure, includes a plurality of bodys 1 through threaded connection each other, and every body 1 is formed by the outer wall welding of a plurality of nozzle stub 101 and a plurality of ball bearing 2, nozzle stub 101 sets up with ball bearing 2 is mutually in the wrong, and the front end of body 1 at the forefront is equipped with drill bit 3, evenly be equipped with a plurality of injected holes 4, every around the axis on the pipe wall of nozzle stub 101 also is equipped with a plurality of injected holes 4 of evenly arranging around the axis of body 1, and the link that preceding body 1 is connected with the next body 1 is equipped with the external screw thread, and the link that next body 1 is connected with preceding body 1 is equipped with the internal thread.

The short pipe 101 is a steel flower pipe with the outer diameter of phi 100 and 120 mm.

The aperture size of the grouting holes 4 is 6-8 mm.

The distance between two adjacent ball bearings 2 on each pipe body 1 is 1-2m, so that the contact friction between the grouting pipe and the inner wall of the pipe body is prevented.

A setting method for a multi-function bolt construction, comprising the steps of:

step one, setting a driving device of an anchor rod: the anchor rod fixing device comprises a base 5, wherein a reciprocating crawler belt 6 is arranged on the base 5, a torsion driving device 7 for clamping and rotating an anchor rod is arranged on the reciprocating crawler belt 6, and a guide bracket 8 for the anchor rod is arranged at one end of the base 5 in the advancing direction of the anchor rod;

step two, setting a grouting pipe: one end of a grouting pipe 9 extends into a central control area inside the anchor rod, the insertion depth is the depth of the grouting pipe extending into a drill bit, and the other end of the grouting pipe is connected with a grouting pump 10 of the anchor rod;

step three, grouting: the torque driving device 7 clamps and rotates the anchor rod, the reciprocating caterpillar band 6 drives the torque driving device 7 to move forwards, and the grouting pump performs grouting to the inside of the anchor rod through a grouting pipe;

step four, post prestress tension setting: and after grouting, inserting a reinforcing steel bar 11 from the tail end of the anchor rod, exposing one end of the reinforcing steel bar 11 outside the anchor rod, and inserting a section of reinforcing steel bar into the anchor rod after grouting so as to facilitate later-stage prestress tensioning.

The grouting process of the third step specifically comprises the following steps: the pipe body 1 at the most front end is set as a first pipe body, the subsequent connection is sequentially set as a second pipe body and a third pipe body … …,

the torque driving device 7 clamps a first pipe body with a drill bit 3, the first pipe body is rotated, the reciprocating crawler 6 drives the torque driving device 7 to move forwards and further drives the first pipe body to move forwards, the grouting pump 10 works simultaneously to perform grouting into the anchor rod through the grouting pipe 9 in the process of the rotation and the forward movement of the first pipe body, when the first pipe body reaches a preset depth, the grouting is stopped, the torque driving device 7 stops rotating and does not clamp the first pipe body, the first pipe body is in threaded connection with the second pipe body, the torque driving device 7 returns to the initial position under the action of the reciprocating crawler 6 to repeat the step of the first pipe body to perform work on the second pipe body, the grouting is injected at the end part of the anchor rod, the purpose of drilling and grouting can be achieved, one end of the grouting pipe is inserted into the hollow area of the anchor rod before drilling, the insertion depth is near the drill bit, the grouting pipe at the other end is connected with the grouting pump, drilling and grouting to form rotary jet so as to play a role in reinforcing the stratum around the anchor rod, wherein an arrow shown in figure 3 is a direction of the rotary jet.

The critical anchoring length of the reinforcing steel bar can be quickly estimated by adopting the formula IC (5.6-6.2) d0 √ (Eb/Es).

In the formula: IC is the critical anchoring length; d0 is the anchor radius; eb is the comprehensive elastic modulus of the anchoring body; and Es is the shear modulus of the soil body around the anchoring body.

The torque driving device designed in the utility model is a device in the prior art, which can clamp and rotate the anchor rod, as shown in fig. 5, the torque driving device is a schematic diagram, and comprises an installation seat 701 installed on the reciprocating track 6, and a torque motor 702 installed on the installation seat 701, the torque motor is connected with a rotating drum 706 through a transmission assembly 704, a fixed drum 703 is sleeved outside the rotating drum, a bearing 705 is arranged between the rotating drum 706 and the fixed drum 703, the rotating drum 706 is provided with a fastening clamp 707 for fastening the anchor rod, the fixed drum 703 is fixed on the installation seat 701, the fastening clamp 707 clamps the anchor rod, the torque motor 702 drives the rotating drum 706 to rotate, and further drives the anchor rod to rotate, and the whole torque driving device reciprocates on the reciprocating track 6.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A multi-functional stock structure which characterized in that: including a plurality of bodys through threaded connection each other, every body is formed by the outer wall welding of a plurality of nozzle stub and a plurality of ball bearing, nozzle stub and ball bearing are the setting of staggering mutually, and the front end of the body of foremost is equipped with the drill bit, evenly be equipped with a plurality of injected holes around the axis line on the drill bit, every the injected hole that also is equipped with a plurality of evenly arranged around the axis of body on the pipe wall of nozzle stub.

2. A multi-function anchor rod construction as claimed in claim 1, wherein: the short pipe adopts a steel flower pipe with the outer diameter of phi 100 and 120 mm.

3. A multi-function anchor rod construction as claimed in claim 1, wherein: the aperture size of the grouting hole is 6-8 mm.

4. A multi-function anchor rod construction as claimed in claim 1, wherein: the distance between two adjacent ball bearings on each pipe body is 1-2 m.