CN109778852B

CN109778852B - T-shaped connecting sleeve for pulling and pressing composite anchor rod and anchor rod

Info

Publication number: CN109778852B
Application number: CN201910249055.9A
Authority: CN
Inventors: 涂兵雄; 陈至昕; 程强; 俞缙; 刘士雨; 蔡燕燕
Original assignee: Huaqiao University
Current assignee: Huaqiao University
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2024-02-23
Anticipated expiration: 2039-03-29
Also published as: CN109778852A

Abstract

The invention relates to a T-shaped connecting sleeve for a pull-press composite anchor rod, which comprises a T-shaped sleeve body and a connecting rib hole formed in the sleeve body, wherein the connecting rib hole penetrates from one axial end of the sleeve body to the other axial end, the sleeve body is provided with a first barrel section and a second barrel section which are integrally formed, the outer diameter of the first barrel section is smaller than that of the second barrel section, and the connecting rib hole is a threaded hole matched with an anchor rod body. After the technical scheme of the invention is adopted, during construction, the anchor rod body is directly arranged in the T-shaped sleeve through threaded connection, so that the installation is convenient, the quality is reliable, and the bearing capacity is high; the T-shaped connecting sleeve is arranged, so that the bearing plate and the T-shaped connecting sleeve can be fixed by spot welding, and the welding workload of welding and fixing the anchor rod body by adopting the upper bar steel bar in the construction process is greatly reduced; the second barrel section has an outer diameter greater than the outer diameter of the first barrel section, and the second barrel section is capable of effectively and reliably transmitting load to the bearing plate.

Description

T-shaped connecting sleeve for pulling and pressing composite anchor rod and anchor rod

Technical Field

The invention relates to an anchor rod system for supporting mine roadways, traffic tunnels, water conservancy culverts and foundation foundations, in particular to a T-shaped connecting sleeve for a pull-press composite anchor rod and the anchor rod.

Background

The bearing capacity of the tension-compression composite anchor rod (as disclosed in patent number ZL 201420450678.5) is obviously improved, the engineering cost is greatly reduced, and the tension-compression composite anchor rod is applied to practical engineering. The pull-press composite anchor rod technology has wide application prospect in anchoring projects such as side slopes, foundation pits, water conservancy, dykes and dams, mines, underground projects and the like.

One of the mechanisms for obviously improving the bearing capacity of the tension-compression composite anchor rod is to decompose the large concentrated load transmitted from the anchor head to the bearing plate into two small concentrated forces under the action of the bearing plate, and the two small concentrated forces are respectively shared by the bearing anchoring section and the tension anchoring section. Therefore, the decomposition of the concentrated force of the anchor head is reliably realized at the bearing plate, and the method is a ring key technology for guaranteeing the bearing capacity of the tension-compression composite anchor rod. Because the current tension-compression composite anchor rod is in the engineering application popularization stage, the fixing of the bearing plate on the anchor rod steel bar mainly adopts the welding of the upper strip, and is influenced by the welding quality, such as false welding, missing welding, blank welding and the like, the bearing capacity of the upper strip which is easy to weld does not meet the design requirement, the upper strip is pulled along the welding line in the tensioning process of the anchor rod, the bearing plate of the tension-compression composite anchor rod is triggered to fail, and finally the tension-compression composite anchor rod is damaged, and the bearing capacity cannot meet the design requirement.

In view of this, the present inventors have conducted intensive studies on the above problems, and have made the present invention.

Disclosure of Invention

Aiming at the problems that the welding labor intensity is high and the welding quality is easy to be unqualified caused by adopting a method of welding and fixing the bearing plate by using the upper strip in the pull-press composite anchor rod in actual engineering, the invention provides the T-shaped connecting sleeve, which can effectively control the mounting quality of the bearing plate by a reliable mechanical connecting method, and has the advantages of convenient and quick construction, high efficiency and reliability. Another object of the invention is also to propose a bolt employing such a T-shaped connection sleeve.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

a T type connecting sleeve for drawing and pressing compound stock, including being the sleeve body of T type and forming the muscle hole that links in the sleeve body, link the muscle hole to run through to the other end from sleeve body axial one end, the sleeve body has integrated into one piece's first section of thick bamboo section and second section of thick bamboo section, and the external diameter of first section of thick bamboo section is less than the external diameter of second section of thick bamboo section, link the muscle hole for with stock body complex screw hole.

As a preferable mode of the invention, the aperture of the connecting rib hole is 10-30mm.

As a preferred mode of the invention, the outer diameter of the first barrel section is 16-40mm, and the outer diameter of the second barrel section is 10-20mm larger than the outer diameter of the first barrel section.

As a preferred form of the invention, the wall thickness of the first barrel section is 3-5mm and the wall thickness of the second barrel section is 8-15mm.

The invention also provides an anchor rod, which comprises an anchor rod body and a bearing plate sleeved on the anchor rod body, wherein a sleeve is sleeved at one axial end of the anchor rod body, a T-shaped connecting sleeve is arranged at the other axial end of the bearing plate, the T-shaped connecting sleeve comprises a T-shaped sleeve body and a connecting rib hole formed in the sleeve body, the connecting rib hole penetrates from one axial end of the sleeve body to the other end, the sleeve body is provided with a first barrel section and a second barrel section which are integrally formed, the outer diameter of the first barrel section is smaller than that of the second barrel section, the connecting rib hole is a threaded hole matched with the anchor rod body, the anchor rod body comprises a first anchor rod section and a second anchor rod section, a first threaded part is arranged at one end of the first anchor rod section, a second threaded part is arranged at one end of the second anchor rod section, the first threaded part and the second threaded part are both in the connecting rib hole, and the second barrel section and the bearing plate are fixed through spot welding.

After the technical scheme of the invention is adopted, during construction, the first anchor rod section and the second anchor rod section of the anchor rod body can be quickly and mechanically connected through the T-shaped connecting sleeve, so that the installation is convenient, the quality is reliable, and the bearing capacity is high; the bearing plate can be directly fixed with the second barrel section of the T-shaped connecting sleeve in a spot welding way, so that the welding workload of welding and fixing the bearing plate by adopting the upper bar steel bars in the construction process is greatly reduced, and the problem that the upper bar steel bars fail due to the welding quality problem is effectively avoided; the second barrel section has an outer diameter greater than the outer diameter of the first barrel section, and the second barrel section is capable of effectively and reliably transmitting load to the bearing plate.

Drawings

Fig. 1 is a drawing showing the installation of a pull-press composite anchor rod for installing a T-shaped connecting sleeve.

Fig. 2 is a schematic view of a T-connection sleeve mounting node of the present invention.

Fig. 3 is a schematic structural view of a first anchor segment according to the present invention.

FIG. 4 is a schematic view of the construction of a second anchor segment of the present invention;

fig. 5 is a cross-sectional view of a T-shaped connector sleeve of the present invention.

FIG. 6 is a cross-sectional view A-A of FIG. 5 in accordance with the present invention.

FIG. 7 is a cross-sectional view B-B of FIG. 5 in accordance with the present invention.

Fig. 8 is a left side view of fig. 5 in accordance with the present invention.

Fig. 9 is a right side view of fig. 5 in accordance with the present invention.

Fig. 10 is a schematic drawing of a tension and compression composite anchor rod with an enhanced bearing plate installed.

Fig. 11 is a longitudinal cross-sectional view of the reinforced bearing plate.

Fig. 12 is a cross-sectional view of the bearing plate of the present invention.

FIG. 13 is a cross-sectional view A-A of FIG. 12 in accordance with the present invention.

FIG. 14 is a cross-sectional view B-B of FIG. 12 in accordance with the present invention.

Fig. 15 is a schematic view of a reinforcing bar according to the present invention.

Fig. 16 is a schematic view of an enhanced bearing plate with circular stirrups according to the present invention.

Fig. 17 is a schematic view of an enhanced bearing plate with spiral stirrups according to the present invention.

Fig. 18 is a cross-sectional view of a node of a tension-compression composite anchor bearing plate with an anti-slip sleeve joint installed.

Fig. 19 is a cross-sectional view of a large sample of the installation of the anti-slip casing joint.

FIG. 20 is a partial cross-sectional view of the portion A-A of FIG. 19 in accordance with the present invention.

FIG. 21 is a partial cross-sectional view of B-B of FIG. 19 in accordance with the present invention.

FIG. 22 is a cross-sectional view of a nipple of the present invention.

FIG. 23 is a cross-sectional view of FIG. 22, taken along line C-C, in accordance with the present invention.

Fig. 24 is a cross-sectional end view of the anti-slip casing joint of the present invention.

Fig. 25 is a cross-sectional view of the screw sleeve of the present invention.

FIG. 26 is a section view D-D of FIG. 25 according to the present invention.

FIG. 27 is a cross-sectional view of a ferrule-to-ferrule connection of the present invention.

FIG. 28 is a cross-sectional view E-E of FIG. 27 in accordance with the present invention.

FIG. 29 is a cross-sectional view of F-F of FIG. 27 in accordance with the present invention.

Fig. 30 is a cross-sectional view of a reinforcement hole of the bearing plate of the present invention.

FIG. 31 is a view showing the completion of the installation of the U-shaped centering bracket of the present invention.

Fig. 32 is a cross-sectional view of a T-shaped plug of the present invention.

FIG. 33 is a cross-sectional view A-A of FIG. 32 in accordance with the present invention.

FIG. 34 is a section B-B of FIG. 32 in accordance with the present invention.

Fig. 35 is a cross-sectional view of a pallet of the present invention.

FIG. 36 is a cross-sectional view C-C of FIG. 35 in accordance with the present invention.

FIG. 37 is a section view D-D of FIG. 35 according to the present invention.

Fig. 38 is a cross-sectional view of a sleeve according to the present invention.

FIG. 39 is a cross-sectional view of a preferred embodiment of a plug body B-B according to the present invention.

FIG. 40 is a schematic cross-sectional view of an anchor rod with a universal rubber stopper installed in accordance with the present invention.

FIG. 41 is a cross-sectional view A-A of FIG. 40 in accordance with the present invention.

FIG. 42 is a cross-sectional view B-B of FIG. 40 in accordance with the present invention.

FIG. 43 is a cross-sectional view C-C of FIG. 40 in accordance with the present invention.

In the figure:

a T-shaped connecting sleeve 10; a first barrel section 101; a second barrel section 102; the welding points 104 of the connecting rib holes 103; a pressure-bearing plate 11; a tendon hole 111; grouting pipe perforation 112 limit clip 113; a grouting pipe 12; a bolt body 13; a first anchor rod segment 131; a second anchor segment 132; a first screw part 133; a second screw part 134; a sleeve 135; a grouting body 14; a rock mass 15; reinforcing ribs 20; a circular stirrup 21 of connecting threads 201; spiral stirrups 22; a rib receiving groove 23; an inner screw 231; a first end 301 of the nipple 30; a second end 302; a mating thread 303; a ferrule 31; a support flange 311; a screw sleeve 32; a limit flange 321; screwing the screw thread 322; a screw groove 33; a T-shaped plug 40; a central bore 401; cylindrical section 41; a rib hole 411; the first thread portion 412 is a mass reducing hole 413; a tapered section 42; the rib placing groove 421; a second screw thread portion 422; annular elastic slit 423, radial elastic slit 424; a support panel 43; an internal thread portion 431; a guide plate 432; a lock sleeve 44; an inner screw tooth portion 441; a plug body 50; a first stopper rib seam 501; a first stopper rib hole 502; a second stopper rib slit 503; second stopper rib hole 504

Detailed Description

For further explanation of the technical solution of the present invention, reference is made to fig. 1 to 43, and the following description is made in detail with reference to the accompanying drawings.

Example 1

Referring first to fig. 1 to 9, a T-shaped connecting sleeve 10 for a pull-press composite anchor rod comprises a T-shaped sleeve body and a connecting rib hole 103 formed in the sleeve body, wherein the connecting rib hole 103 penetrates from one axial end of the sleeve body to the other axial end, the sleeve body is provided with a first barrel section 101 and a first barrel section 102 which are integrally formed, the outer diameter of the first barrel section 101 is smaller than that of the second barrel section 102, and the connecting rib hole 103 is a threaded hole matched with an anchor rod body 13.

As a preferable mode of the invention, the aperture of the connecting rib hole 103 is 10-30mm. As a preferred mode of the invention, the outer diameter of the first barrel section 101 is 16-40mm, and the outer diameter of the second barrel section 102 is 10-20mm larger than the outer diameter of the first barrel section 101. As a preferred form of the invention, the wall thickness of the first barrel section 101 is 3-5mm and the wall thickness of the second barrel section 102 is 8-15mm.

The invention also provides an anchor rod, which comprises an anchor rod body 13 and a bearing plate 11 sleeved on the anchor rod body 13, wherein a sleeve 135 is sleeved at one axial end of the anchor rod body 13 on the bearing plate 11, a T-shaped connecting sleeve 10 is arranged at the other axial end of the anchor rod body 13 on the bearing plate 11, the anchor rod body 13 comprises a first anchor rod segment 131 and a second anchor rod segment 132, a first threaded part 133 is arranged at one end of the first anchor rod segment 131, a second threaded part 134 is arranged at one end of the second anchor rod segment 132, the first threaded part 133 and the second threaded part 134 are both in threaded connection with the connecting rib hole 103, the second barrel segment 102 is welded on the bearing plate 11, and particularly, the end face of the second barrel segment 102 is welded on the bearing plate 11 through spot welding and forms a welding point 104.

The invention relates to a T-shaped connecting sleeve 10 for a pull-press composite anchor rod, which comprises the following construction steps:

(1) Machining a first anchor rod section 131 and a second anchor rod section 132 according to the design of the tension-compression composite anchor rod, and machining a first threaded part 133 and a second threaded part 134 on the first anchor rod section 131 and the second anchor rod section 132 respectively; (2) Screwing the first threaded portion 133 of the first anchor rod segment 131 into the web hole 103 from the second barrel segment 102 of the T-shaped connection sleeve 10, and screwing the second threaded portion 134 of the second anchor rod segment 132 into the web hole 103 from the first barrel segment 101 of the T-shaped connection sleeve 10; (3) The reinforcement penetrating holes 111 of the bearing plate 11 are aligned with the first anchor rod section 131, the bearing plate 11 penetrates into the first anchor rod section 131 and moves to the T-shaped connecting sleeve 10, after being tightly attached to the end face of the second barrel section 102, the bearing plate is fixed by spot welding, and then the sleeve 135 is sleeved on the first anchor rod section 131.

The anchor rod body 13 can adopt the reinforced bar or the steel strand of the anchor rod body 13 in the invention. When the anchor rod body 13 adopts the steel strand wires, the screw thread is cancelled in the connecting rib hole 103, the steel strand wires in the T-shaped connecting sleeve 10 are not broken, after the T-shaped connecting sleeve 10 is directly sleeved into the design position of the steel strand wires, the first barrel section 101 of the T-shaped connecting sleeve 10 is fixed on the steel strand wires through the extrusion action of an extruder, and the installation and the fixation of the T-shaped connecting sleeve 10 on the anchor rod body 13 can be completed.

After the technical scheme of the invention is adopted, during construction, the first anchor rod section 131 and the second anchor rod section 132 of the anchor rod body 13 can be quickly and mechanically connected through the T-shaped connecting sleeve 10, so that the installation is convenient, the quality is reliable, and the bearing capacity is high; the bearing plate 11 can be directly fixed with the second barrel section 102 of the T-shaped connecting sleeve 10 by spot welding, so that the welding workload of welding the bearing plate 11 by adopting the upper bar reinforcing steel bars in the construction process is greatly reduced, and the problem that the upper bar reinforcing steel bars fail due to the welding quality problem is effectively avoided; the second barrel section 102 has an outer diameter larger than that of the first barrel section 101, and the second barrel section 102 can efficiently and reliably transmit load to the bearing plate 11.

Example two

Referring to fig. 10 to 17, the present invention further provides an enhanced bearing plate for a pull-press composite anchor rod, which includes a bearing plate 11, a grouting pipe perforation 112 and a tendon passing hole 111 are provided on the bearing plate 11, a plurality of tendon receiving grooves 23 are provided on one end of the bearing plate 11 along the axial direction, in the embodiment, six tendon receiving grooves 23 are shown, an internal thread 231 is provided in the tendon receiving groove 23, and a plurality of reinforcing tendons 20 are provided, the reinforcing tendons 20 are correspondingly six, and the reinforcing tendons 20 are correspondingly screwed in the tendon receiving grooves 23.

As a preferred embodiment of the present invention, a plurality of the reinforcing ribs 20 are arranged in parallel. As a preferable mode of the invention, the thickness of the bearing plate body is 20-40mm. As a preferable mode of the invention, the diameter of the reinforcing rib 20 is 8-20mm, and the length of the reinforcing rib 20 is 2-5 times of the diameter of the anchor rod drilling hole.

The invention relates to an anchor rod, which comprises an anchor rod body 13 and a reinforced bearing plate sleeved on the anchor rod body 13, wherein a sleeve 135 is sleeved on one axial end of the anchor rod body 13 on the bearing plate 11, a limit clamp 113 is arranged on the other axial end of the anchor rod body 13 on the bearing plate 11, a grouting pipe perforation 112 and a tendon penetration hole 111 are arranged on the bearing plate 11, the anchor rod body 13 is penetrated in the tendon penetration hole 111, a plurality of tendon receiving grooves 23 are arranged on one axial end of the bearing plate 11, a plurality of reinforcing tendons 20 are also included, and the reinforcing tendons 20 are correspondingly connected in the tendon receiving grooves 23 in a threaded manner.

The invention relates to an enhanced bearing plate for a pull-press composite anchor rod, which comprises the following construction steps: (1) Penetrating an anchor rod body 13 into a through-hole 111 of the bearing plate 11, adjusting the bearing plate 11 to a design position, and enabling a rib receiving groove 23 on the bearing plate 11 to point to the anchor head direction; (2) The bearing plate 11 is fixed by a limit clamp 113, a sleeve 135 is sleeved on the anchor rod body 13, and a grouting pipe 12 is penetrated into the grouting pipe perforation 112; (3) The connecting screw thread 201 of the reinforcing rib 20 is screwed into the rib connecting groove 23 of the bearing plate 11 until the screw is screwed; (4) And placing round stirrups 21 or spiral stirrups 22 on the periphery of the reinforcing ribs 20, and firmly binding by spot welding or wire tying, thus finishing the installation of the reinforced bearing plate 11.

By adopting the technical scheme of the invention, the reinforcing ribs 20 can form certain circumferential constraint on the grouting body 14 within the length range, so that the compressive bearing capacity of the grouting body 14 is greatly improved. And the reinforcing ribs 20 can disperse and transfer the load born by part of the bearing plates 11 to the grouting bodies 14 in a certain range in front of the bearing plates 11, so that the effect of sharing the load born by the grouting bodies 14 is achieved, the load born by the grouting bodies 14 at the bottom of the bearing plates 11 is greatly reduced, and the compression-resistant bearing safety coefficient of the grouting bodies 14 is improved. When the bearing plate 11 is clamped with soil to a certain extent due to construction quality, the reinforcing ribs 20 are rigidly connected with the bearing plate 11, so that load transmitted to the grouting body 14 by the bearing plate 11 can be finally transmitted to the grouting body 14 through interaction among the bearing plate, the reinforcing ribs and the grouting body, and bearing damage caused by serious insufficient strength of the grouting body at the bottom of the bearing plate 11 due to soil clamping is effectively avoided, and bearing capacity failure of an anchor rod is further avoided. The reinforcing ribs 20 adopt a threaded connection mode, and have the advantage of convenient construction.

In the first and second embodiments, the icon 15 represents a rock-soil body.

Example III

Referring to fig. 18 to 30, the present invention further provides a grout-proof sleeve joint for a pull-press composite anchor rod, which comprises a threaded pipe 30 in threaded connection with a bearing plate 11, a sleeve pipe 31 sleeved outside a sleeve pipe 135, and a screw sleeve 32 sleeved outside the sleeve pipe 31, specifically, the sleeve pipe 31 is sleeved outside the sleeve pipe 135 in a hot-melt bonding manner, two ends of the threaded pipe 30 in the axial direction are respectively provided with a first end 301 and a second end 302, the first end 301 is in threaded connection with a screw sleeve 32 in a threaded connection groove 33 of the bearing plate 11, a limiting flange 321 extending towards the center of the screw sleeve 32 is formed on the end of the screw sleeve 32, a screwing thread 322 is arranged in the screw sleeve 32, the sleeve pipe 31 is arranged in the screw sleeve 32 in a penetrating manner, a supporting flange 311 is formed in the screw sleeve 32, and the supporting flange 311 is propped against between the end of the threaded pipe 30 and the limiting flange 321 of the screw sleeve 32. The outer wall of the nipple 30 is provided with a butt screw 303, and a screw sleeve 32 is screwed into the nipple 30.

As a preferred form of the invention, the length of the nipple 30 is in the range of 20-50mm. As a preferable mode of the present invention, the bearing plate 11 is provided with a rib penetrating hole 111, a screw groove 33 is provided in the rib penetrating hole 111, and the screw pipe 30 is screwed in the screw groove 33. As a preferred mode of the present invention, the length of the screw groove 33 is 5-10mm. As a preferable mode of the present invention, when the screw sleeve 32 is locked, a distance between an end of the screw sleeve 32 adjacent to the bearing plate 11 and the bearing plate 11 is 5-10mm.

The invention also provides an anchor rod, which comprises an anchor rod body 13 and a bearing plate 11 sleeved on the anchor rod body 13, wherein a sleeve 135 is sleeved on one axial end of the anchor rod body 13 on the bearing plate 11, a limit clamp 113 is arranged on the other axial end of the anchor rod body 13 on the bearing plate 11, grouting pipe perforations 112 and a reinforcement penetrating hole 111 are formed in the bearing plate 11, and the anchor rod body 13 is penetrated in the reinforcement penetrating hole 111.

A prevent cluster thick liquid sleeve joint for drawing compound stock of pressing includes the following step:

(1) Screwing the screwed pipe 30 into the screwed groove 33 of the bearing plate 11; (2) The anchor rod body 13 is penetrated into the threaded pipe 30 and the through-rib hole 111 of the bearing plate 11, the bearing plate 11 is adjusted to the design position, and the limit clamp 113 is fixed; (3) Cutting out the sleeve 135 according to the design length, and after the end head is sleeved into the screw sleeve 32, processing and connecting the sleeve pipe 31 with the sleeve 135; (4) The sleeve 31 mounted on the sleeve 135 is faced to the bearing plate 11, the sleeve 135 is sleeved on the anchor rod body 13 from the anchor head side, the screw sleeve 32 is screwed on the screw tube 30, and the joint mounting is completed when the supporting flange 311 is tightly contacted with the limiting flange 321.

By adopting the technical scheme of the invention, the sleeve 135 is tightly connected with the bearing plate 11 sequentially through the sleeve pipe 31, the screw sleeve 32 and the screw pipe 30, and the connecting parts have no gaps and good sealing performance, so that the isolation between the anchor rod body 13 in the sleeve 135 and the grouting body 14 outside the sleeve 135 can be completely ensured, and the slurry stringing phenomenon in the sleeve 135 can be thoroughly eradicated. Therefore, in the process of transferring the load at the anchor head to the bearing plate 11, the axial tension loss of the anchor rod body 13 cannot occur, and the engineering safety is effectively ensured; meanwhile, the invention has the advantages of convenient manufacture, quick connection, reliable quality and mass production of related parts.

Example IV

Referring to fig. 31 to 39, the present invention further proposes a U-shaped centering bracket for a bolt, comprising a cylindrical support plate 43 and a T-shaped plug 40 disposed in the support plate 43, wherein one end of the support plate 43 in the axial direction is provided with a guide plate 432 extending toward the center of the support plate 43, the T-shaped plug 40 is provided with a central hole 401 through which a grouting pipe 12 passes and a rib hole 411 through which the bolt body 13 passes, the support plate 43 is internally provided with an internal thread portion 431, and the T-shaped plug 40 is provided with a screw thread portion engaged with the internal thread portion 431. In the present invention, the internal thread portion 431 may not be disposed along the inner wall of the supporting plate 43, and in the embodiment, the internal thread portion 431 extends to the middle of the supporting plate 43, so that after the T-shaped plug 40 is installed, the T-shaped plug 40 is located at the middle of the supporting plate 43, and is easy to lock and has better stress.

As a preferred mode of the present invention, the T-shaped plug 40 includes a cylindrical section 41 and a tapered section 42, the screw thread portion is a first screw thread portion 412 formed on an outer wall of the cylindrical section 41, a second screw thread portion 422 is provided on an outer wall of the tapered section 42, the cylindrical section 41 is provided with a rib hole 411 and a central hole 401, the rib hole 411 and the central hole 401 each extend from one end to the other end in an axial direction of the cylindrical section 41, the tapered section 42 is provided with a rib groove 421 and a central hole 401, the rib groove 421 and the central hole 401 each extend from one end to the other end in an axial direction of the tapered section 42, the tapered section 42 is further provided with an annular screw thread 423, the annular screw thread 423 extends from one end to the other end in an axial direction of the tapered section 42, the annular screw thread 423 further includes a radial screw thread 424 provided between the rib groove 421 and the radial screw thread 424, the radial screw thread 424 extends from one end to the other end in an axial direction of the tapered section 42, the radial screw thread 424 extends from the outer wall of the tapered section 42 to the other end, the radial screw thread 423 extends from the outer wall of the tapered section 42 to the annular screw thread 423, and the second screw thread portion 44 is provided with a second screw thread portion 422, and the number of the screw thread portion is equal to the screw thread portion 422 is provided in the screw thread portion.

In a preferred embodiment of the present invention, the guide plate 432 is an arc-shaped guide plate 432, and has a substantially conical shape. As a preferred mode of the present invention, the thickness of the annular elastic slit 423 is 5-15mm, and the width of the radial elastic slit 424 is 3-5mm.

In this embodiment, the number of the rib holes 411 of the T-shaped plug 40 is 4, the 4 rib holes 411 are disposed around the central hole 401, and the central hole 401 of the T-shaped plug 40 and the rib holes 411 are formed on the cylindrical section 41. The T-shaped plug of the present invention may be sold as a separate fitment.

Referring to fig. 39, as a preferable embodiment of the plug body of the present invention, a mass reducing hole 413 is further provided in the plug body.

The invention also provides an anchor rod, which comprises an anchor rod body 13 and a bearing plate 11 sleeved on the anchor rod body 13, wherein a sleeve 135 is sleeved at one axial end of the anchor rod body 13 on the bearing plate 11, a limit clamp 113 is arranged at the other axial end of the anchor rod body 13 on the bearing plate 11, a grouting pipe perforation 112 and a tendon penetrating hole 111 are arranged on the bearing plate 11, the anchor rod body 13 is penetrated in the tendon penetrating hole 111, the anchor rod further comprises a T-shaped plug 40 sleeved on the anchor rod body 13, the T-shaped plug 40 is the T-shaped plug 40, the anchor rod further comprises a cylindrical support plate 43, the T-shaped plug 40 is matched in the support plate 43, a guide plate 432 extending towards the center of the support plate 43 is arranged at one axial end of the support plate 43, an inner threaded portion 431 is arranged in the support plate 43, and a screw tooth portion matched with the inner threaded portion 431 is arranged on the T-shaped plug 40. In an embodiment, the grouting pipe perforation 112 of the bearing plate 11 is coaxially disposed with the central hole 401 of the T-shaped plug 40, and the tendon hole 111 of the bearing plate 11 is coaxially disposed with the tendon hole 411 of the cylindrical section 41 of the T-shaped plug 40 and the tendon groove 421 of the tapered section 42 of the T-shaped plug 40.

The invention relates to a U-shaped centering bracket for an anchor rod, which comprises the following construction steps:

(1) Pre-screwing the lock sleeve 44 into the tapered section 42 of the T-shaped plug 40, the depth of screwing the lock sleeve 44 into the tapered section 42 is about 1/4-1/2 of the width of the lock sleeve 44; (2) Pre-screwing the support plate 43 onto the cylindrical section 41 of the T-plug 40 with the guide plates 432 and the conical section 42 on either side of the cylindrical section 41; (3) The guide plate 432 of the preassembled centering bracket is directed to the bottom of the anchor rod body 13, the anchor rod body 13 sequentially passes through the rib placing hole 411 and the rib placing groove 421 of the T-shaped plug 40, and the grouting pipe 12 passes through the central hole 401 of the T-shaped plug 40; (4) The centering bracket penetrating the anchor rod body 13 is moved to a design position, the lock sleeve 44 is screwed to be tight, and the support panel 43 is screwed to be tight, so that the installation of the U-shaped centering bracket is completed.

The supporting plate 43 of the centering bracket is cylindrical, has large contact area with the hole wall and small contact pressure, cannot sink into soil body of the hole wall, and can ensure that the anchor rod body 13 is always positioned at the centering position in the construction process and ensure the bonding force between the rod body and the grouting body 14; the support panel 43 is provided with the guide plate 432, so that the anchor rod body 13 can easily slide into a drilled hole in the process of being placed into the drilled hole, the cutting and disturbance of a reinforcing steel bar welding bracket to a hole wall soil body can be effectively avoided, and soil body residues in the drilled hole are reduced; the centering bracket has simple components and is convenient for mass production and manufacture.

The limit stop 113 according to the invention can be implemented with the T-shaped coupling sleeve 10 according to the invention.

Example five

Referring to fig. 40 to 43, the present invention further provides a universal rubber plug for isolating and centering an anchor rod body 13, comprising a plug body 50, wherein a central hole 401 (for penetrating a grouting pipe 12) is arranged on the plug body 50, the central hole 401 penetrates from one axial end to the other axial end of the plug body 50, the plug body 50 comprises a cylindrical section 41 and a conical section 42, the cylindrical section 41 and the conical section 42 can be integrally formed, the outer wall of the cylindrical section 41 forms a first screw thread part 412, the outer wall of the conical section 42 forms a second screw thread part 422, the cylindrical section 41 is provided with a first plug rib hole 502 and a first plug rib slot 501 communicated with the first plug rib hole 502, the first plug rib hole 502 and the first plug rib slot 501 extend from one axial end to the other axial end of the cylindrical section 41, the first plug rib slot 501 extends to the outer wall of the cylindrical section 41, the conical section 42 is provided with a second plug rib hole 504 and a second plug rib slot 503 communicated with the second plug rib hole 504, the second bung hole 504 and the second bung slot 503 extend from one axial end of the conical section 42 to the other axial end, the second bung slot 503 is communicated with the first bung slot 501 on the cylindrical section 41, the second bung slot 503 extends to the outer wall of the conical section 42, the conical section 42 is also provided with an annular elastic slot 423, the annular elastic slot 423 extends from one axial end of the conical section 42 to the other axial end, the annular elastic slot 423 is arranged between the second bung slot 504 and the second bung slot 503, the second bung slot comprises a radial elastic slot 424 arranged on the conical section 42, the radial elastic slot 424 extends from one axial end of the conical section 42 to the other axial end, the radial elastic slot 424 penetrates from the outer wall of the conical section 42 to the annular elastic slot 423, the second bung slot 44 is also provided with a lock sleeve 44 screwed on the second screw part 422, the inner wall of the lock sleeve 44 is provided with inner screw parts 441 matched with the second screw part 422, the second bung slot 504 and the first bung slot 502 are equal in number, and are communicated with each other.

As a preferred mode of the present invention, the width of the first stopper rib slit 501 is 4-10mm smaller than the diameter of the first stopper rib hole 502. As a preferred mode of the present invention, the width of the second stopper rib slit 503 is 4-10mm smaller than the diameter of the second stopper rib hole 504. As a preferred mode of the present invention, the thickness of the annular elastic slit 423 is 5-15mm, and the width of the radial elastic slit 424 is 3-5mm.

The invention relates to a universal rubber plug for the isolation and centering of an anchor rod body, which comprises the following construction steps:

(1) Penetrating the anchor rod body 13 into the lock sleeve 44, moving the lock sleeve 44 to the vicinity of the designed position on the anchor rod body 13, and placing the stopper body 50 to the designed position on the anchor rod body 13; (2) Sequentially plugging the anchor rod body 13 into a first stopper rib hole 502 and a second stopper rib hole 504 of the stopper body 50 through a first stopper rib seam 501 and a second stopper rib seam 503; (3) Sequentially penetrating the grouting pipe 12 into the lock sleeve 44 and the central hole 401 of the plug body 50; (4) The lock sleeve 44 is screwed onto the second screw thread part 422 of the conical section 42 until the lock sleeve is tightly closed, and the universal rubber plug is installed.

By adopting the technical scheme of the invention, the universal rubber plug is provided with the first plug rib seam 501, the second plug rib seam 503, the first plug rib hole 502 and the second plug rib hole 504 for placing the anchor rod body 13, the anchor rod body 13 can be installed from the side edge of the plug body, the construction is convenient, and the construction speed is high; the conical section 42 of the universal rubber plug is provided with a radial elastic seam 424 and an annular elastic seam 423, and the universal rubber plug and the anchor rod body 13 can be locked and fixed through the lock sleeve 44; the outer wall of the cylindrical section 41 is provided with a first screw tooth part 412, so that the cylindrical section is convenient to be matched with a centering bracket or a ship-shaped bracket panel and the like for use, and the functions have good expansibility; the number and the diameter of the corresponding first stopper rib holes 502 and the second stopper rib holes 504 can be adjusted according to the number and the diameter of the anchor rod bodies 13 by the universal rubber stopper, so that the universal rubber stopper has good universality and can be used for mass production of different specifications and models.

The invention also provides an anchor rod, which comprises an anchor rod body 13 and a bearing plate 11 sleeved on the anchor rod body 13, wherein a sleeve 135 is sleeved on one axial end of the anchor rod body 13 on the bearing plate 11, a limit clamp 113 is arranged on the other axial end of the anchor rod body 13 on the bearing plate 11, a grouting pipe perforation 112 and a tendon penetrating hole 111 are arranged on the bearing plate 11, the anchor rod body 13 is penetrated in the tendon penetrating hole 111, the anchor rod further comprises a plug body 50 sleeved on the anchor rod body 13, a central hole 401 is arranged on the plug body 50, the central hole 401 penetrates from one axial end to the other axial end of the plug body 50, and the plug body 50 adopts the plug body.

The centering bracket, the T-shaped connecting sleeve, the universal plug, the T-shaped plug and the slurry-preventing sleeve joint can be used in the same anchor rod, so that the comprehensive performance of the anchor rod is improved.

The form of the present invention is not limited to the illustrations and examples, and any person who performs a similar idea of the present invention should be regarded as not departing from the scope of the patent of the invention.

Claims

1. A T type connecting sleeve for drawing compound stock of pressing, including being the sleeve body of T type and forming the even muscle hole in the sleeve body, even muscle hole runs through to the other end from sleeve body axial one end, its characterized in that: the sleeve body is provided with a first barrel section and a second barrel section which are integrally formed, the outer diameter of the first barrel section is smaller than that of the second barrel section, and the connecting rib hole is a threaded hole matched with the anchor rod body;

the aperture of the connecting rib hole is 10-30mm;

the outer diameter of the first cylinder section is 16-40mm, and the outer diameter of the second cylinder section is 10-20mm larger than the outer diameter of the first cylinder section;

the wall thickness of the first cylinder section is 3-5mm, and the wall thickness of the second cylinder section is 8-15mm.

2. The utility model provides an anchor, includes the stock body of rod and cover and establish the bearing plate at the stock body of rod, and the stock body of rod is equipped with sleeve pipe in bearing plate axial one end cover, its characterized in that: the anchor rod body is provided with a T-shaped connecting sleeve at the other axial end of the bearing plate, the T-shaped connecting sleeve comprises a T-shaped sleeve body and a connecting rib hole formed in the sleeve body, the connecting rib hole penetrates from one axial end of the sleeve body to the other axial end, the sleeve body is provided with a first barrel section and a second barrel section which are integrally formed, the outer diameter of the first barrel section is smaller than that of the second barrel section, the connecting rib hole is a threaded hole matched with the anchor rod body, the anchor rod body comprises a first anchor rod section and a second anchor rod section, one end of the first anchor rod section is provided with a first threaded part, one end of the second anchor rod section is provided with a second threaded part, the first threaded part and the second threaded part are in threaded connection with the connecting rib hole, and the second barrel section is fixed with the bearing plate through spot welding;

the aperture of the connecting rib hole is 10-30mm;

the outer diameter of the first cylinder section is 16-40mm, and the outer diameter of the second cylinder section is 10-20mm larger than the outer diameter of the first cylinder section.

3. A rock bolt according to claim 2, wherein: the wall thickness of the first cylinder section is 3-5mm, and the wall thickness of the second cylinder section is 8-15mm.