CN211690360U

CN211690360U - GFRP anchor rod joint

Info

Publication number: CN211690360U
Application number: CN201922282827.7U
Authority: CN
Inventors: 徐学勇; 徐东升; 陈记文; 陈超; 蒋芯; 闫嘉鸣
Original assignee: Dacheng Kechuang Infrastructure Co ltd; Wuhan University of Technology WUT
Current assignee: Dacheng Kechuang Infrastructure Co ltd; Wuhan University of Technology WUT
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-10-16
Anticipated expiration: 2029-12-18

Abstract

The utility model discloses a GFRP stock connects, include: the first anchor ring and the second anchor ring are clamped to form a long-strip-shaped hollow cylindrical structure; a plurality of inserting pieces are symmetrically distributed at two ends of the first anchor ring, and round holes are formed in the inserting pieces; clamping holes matched with the inserting pieces are correspondingly formed in two ends of the second anchor ring, threaded holes are further formed in the second anchor ring, the threaded holes are in one-to-one correspondence with the clamping holes and are perpendicular to the clamping holes, and the diameter of each threaded hole is matched with that of the round hole; nuts are screwed into the threaded holes; and the inner walls of the first anchor ring and the second anchor ring are coated with adhesive layers. The utility model provides a problem that shear strength is low behind the current stock attach fitting.

Description

GFRP anchor rod joint

Technical Field

The utility model relates to a deep basal pit supporting field. More specifically, the present invention relates to a GFRP bolt joint.

Background

The anchor bolt support is an important form of foundation pit support, has the advantages of safety, high efficiency, low cost and the like, simultaneously does not occupy an independent construction period, and can be carried out simultaneously with foundation pit excavation. Compared with the traditional pile and pile support, the construction cost is saved by more than 30-40%, and the requirements of foundation pit slope stability and surrounding building protection can be met. Because of the regulation of the permission of land, the anchor rod support is greatly restricted, the glass fiber anchor rod has the advantages of high tensile strength, light weight, corrosion resistance and the like as a novel anchor rod technology, and meanwhile, the later excavation is convenient, the permission can be exceeded the permission of the land, the support cost can be greatly reduced, the consumption of reinforcing steel bars and the pollution to the environment are reduced, and the resource utilization rate is improved.

The GFRP anchor rod is high in tensile strength, low in shearing strength and incapable of being bent, and the length of a transport tool limits the overall length. When the anchor rod is designed to be too long, joints cannot be generated, the joints on the market are mainly of wedge-shaped structures, so that the shear strength of the anchor rod is low, and if the shear force of the wedge-shaped joints is reduced, the length of the joints needs to be prolonged.

SUMMERY OF THE UTILITY MODEL

The invention aims to provide a GFRP anchor rod joint, which solves the problem that the shearing strength of the existing anchor rod is low after the joint is connected.

To achieve these objects and other advantages in accordance with the purpose of the invention, a GFRP bolt joint is provided, comprising:

the first anchor ring and the second anchor ring are clamped to form a long-strip-shaped hollow cylindrical structure;

a plurality of inserting pieces are symmetrically distributed at two ends of the first anchor ring, and round holes are formed in the inserting pieces; clamping holes matched with the inserting pieces are correspondingly formed in two ends of the second anchor ring, threaded holes are further formed in the second anchor ring, the threaded holes are in one-to-one correspondence with the clamping holes and are perpendicular to the clamping holes, and the diameter of each threaded hole is matched with that of the round hole; nuts are screwed into the threaded holes;

and the inner walls of the first anchor ring and the second anchor ring are coated with adhesive layers.

Preferably, the depth of the clamping hole is 1-5mm longer than the length of the insert sheet.

Preferably, the middle part of the first anchor ring is provided with a first partition table which divides the inner cavity of the first anchor ring into two parts with equal length; the middle part of the second anchor ring is provided with a second partition table which divides the inner cavity of the second anchor ring into two parts with equal length;

the first partition table is provided with a boss, the second partition table is provided with a bayonet matched with the boss, and the boss is the same as the bayonet in size.

Preferably, both sides of the boss and the bayonet are coated with an adhesive layer.

Preferably, elastic rubber gaskets are fixed on the inner arc surfaces of the first anchor ring and the second anchor ring along the circumferential direction of the first anchor ring and the second anchor ring, and the elastic rubber gaskets protrude from the inner wall of the first anchor ring or the inner wall of the second anchor ring by 0-1 mm; the elastic rubber gasket is provided with a convex inclined line.

Preferably, the inner wall of the first anchor ring and the inner wall of the second anchor ring are both internally threaded.

Preferably, one side of the inserting piece close to the first anchor ring is provided with a flange, the outer diameter of the flange is larger than the diameter of the clamping hole, and when the first anchor ring is clamped with the second anchor ring, a gap of 1.5-2.5 mm is formed between the first anchor ring and the second anchor ring.

The utility model discloses at least, include following beneficial effect: by changing the shape of the GFRP anchor rod joint, the shearing force between the joint and the anchor rod is basically eliminated, the problem that the anchor rod is sheared in work is avoided, meanwhile, in order to increase the anchoring force, a thread or an elastic rubber gasket is added on the inner surface of the GFRP anchor rod joint, the anchor rod and the joint are compressed through an external bolt, and the anchor rod is anchored by using friction force and mechanical biting force.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a top view of a GFRP bolt joint of the present invention;

fig. 2 is a side view of the GFRP bolt joint of the present invention;

fig. 3 is a top view of the first and second anchor rings of the present invention;

figure 4 is a detail view of a first anchor ring of the present invention;

FIG. 5 is a detail view of a second anchor ring of the present invention;

FIG. 6 is a side view A-A of FIG. 4;

FIG. 7 is a side view B-B of FIG. 5;

fig. 8 is a side view of C-C in fig. 4.

Description of reference numerals: 1 first anchor ring, 11 inserted sheets, 12 first separating platforms, 13 flanges, 2 second anchor rings, 21 clamping holes, 22 threaded holes, 23 hexagon socket nuts, 24 second separating platforms, 3GFRP anchor rods and 4 elastic rubber gaskets

Detailed Description

The present invention is further described in detail below with reference to examples so that those skilled in the art can implement the invention with reference to the description.

In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1-8, the utility model provides a GFRP stock connects, include:

the anchor ring comprises a first anchor ring 1 and a second anchor ring 2, wherein the first anchor ring 1 and the second anchor ring 2 are both of semi-cylindrical structures, and are clamped to form a long-strip-shaped hollow cylindrical structure;

a plurality of inserting pieces 11 are symmetrically distributed at two ends of the first anchor ring 1, and round holes are formed in the inserting pieces 11; the two ends of the second anchor ring 2 are correspondingly provided with clamping holes 21 matched with the inserting pieces 11, the second anchor ring 2 is also provided with threaded holes 22, the threaded holes 22 are in one-to-one correspondence with the clamping holes 21 and are mutually perpendicular, and the diameter of each threaded hole 22 is matched with that of the round hole; the threaded holes 22 are all screwed with inner hexagonal nuts 23;

and the inner walls of the first anchor ring 1 and the second anchor ring 2 are coated with adhesive layers, and the adhesive layers are made of epoxy resin and the like.

First anchor ring 1 and second anchor ring 2 are made by cast iron material, and inserted sheet 11 also is the iron sheet, and more preferably inserted sheet 11 and first anchor ring 1 are that the whole casting forms.

In the embodiment, three inserting pieces 11 are arranged at each end of the first anchor ring 1 at intervals, the total number is six, when the first anchor ring is installed, two GFRP anchor rods 3 are placed on the inner surface of any anchor ring, the end parts of the two GFRP anchor rods 3 are prevented in the anchor ring symmetrically as much as possible, and finally the length occupied by the two anchor rods in the anchor ring is consistent. And the other half of the anchor ring is covered on the two GFRP anchor rods 3, so that the inserting pieces 11 are inserted into the clamping holes 21, and the two anchor rings are tightly attached to the GFRP anchor rods 3 through the adhesive layer. By screwing the hexagon socket nut 23 into the threaded hole 22 of the second anchor ring 2 and tightening the nut, the two GFRP anchor rods 3 are anchored by the GFRP anchor rod joints and can be put into use.

In a preferred embodiment of the GFRP bolt joint of the present application, the depth of the locking hole 21 is 1-5mm longer than the length of the insertion piece 11 inserted into the locking hole 21, which mainly prevents the inconsistency of the insertion piece 11 penetrating into the locking hole 21 due to the processing error of the insertion piece 11.

In a preferred embodiment of the GFRP bolt joint of the present application, as shown in fig. 2, the first anchor ring 1 is provided with a first partition table 12 in the middle, which divides the inner cavity of the first anchor ring 1 into two parts with equal length; a second partition table 24 is arranged in the middle of the second anchor ring 2, and the inner cavity of the second anchor ring 2 is divided into two parts with equal length;

the first separating table 12 is provided with a boss, the second separating table 24 is provided with a bayonet matched with the boss, and the boss is the same as the bayonet in size.

In the present embodiment, by providing the first and

second spacers

12 and 24, the hollow cylindrical structure formed by the first and

second anchor rings

1 and 2 can be divided into two chambers of equal length, thereby improving the installation accuracy of the two anchor rods.

In a preferred embodiment of the GFRP bolt joint of the present application, the boss and the bayonet are coated on both sides with an adhesive layer.

In a preferred embodiment of the GFRP bolt joint of the present application, as shown in fig. 3, the first anchor ring 1 and the second anchor ring 2 are fixed with an elastic rubber gasket 4 along the inner arc surface of the circumferential direction thereof, and the elastic rubber gasket 4 protrudes from the inner wall of the first anchor ring 1 or the inner wall of the second anchor ring 2 by 0 to 1 mm; the elastic rubber gasket 4 is provided with convex twill.

In the embodiment, because the outer surface of the bolt in the prior art is provided with threads, the elastic rubber gasket 4 is added on the inner surface of the GFRP bolt joint, the friction force between the elastic rubber gasket 4 and the bolt is increased, and the anchoring force on the bolt is enhanced by using the friction force.

In a preferred embodiment of the GFRP bolt joint of the present application, the inner wall of the first anchor ring 1 and the inner wall of the second anchor ring 2 are internally threaded.

In this embodiment, since the outer surface of the anchor rod in the prior art has threads, the inner wall of the anchor ring is provided with threads to increase the friction force between the anchor ring and the anchor rod, and the anchoring force on the anchor rod is enhanced by using the friction force.

In a preferred embodiment that GFRP stock connects of this application, as shown in fig. 3, the inserted sheet 11 is provided with flange 13 near one side of first anchor ring 1, the external diameter of flange 13 is greater than the diameter of card hole 21, works as first anchor ring 1 with when second anchor ring 2 block, first anchor ring 1 with have 1.5 ~ 2.5 mm's clearance between the second anchor ring 2, make the terminal surface contactless of first anchor ring 1 and second anchor ring 2 and have the clearance through setting up flange 13, can increase the mechanical interlock to the stock, cooperate hexagon socket head cap screw again to connect GFRP stock and compress tightly with the stock.

While the embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields suitable for the invention, and further modifications may be readily made by those skilled in the art, and the invention is therefore not limited to the specific details and embodiments shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims

1. A GFRP bolt joint comprising:

2. The GFRP bolt joint of claim 1, wherein the depth of the snap hole is 1-5mm longer than the length of the tab.

3. The GFRP bolt joint of claim 1 or 2, wherein the first anchor ring has a first partition provided in the middle to divide the inner cavity of the first anchor ring into two parts of equal length; the middle part of the second anchor ring is provided with a second partition table which divides the inner cavity of the second anchor ring into two parts with equal length;

4. The GFRP bolt joint of claim 3, wherein the boss and the bayonet are coated on both sides with an adhesive layer.

5. The GFRP bolt joint according to claim 1, wherein the first anchor ring and the second anchor ring are fixed with elastic rubber gaskets along the inner arc surfaces of the circumferential directions of the first anchor ring and the second anchor ring, and the elastic rubber gaskets protrude from the inner wall of the first anchor ring or the inner wall of the second anchor ring by 0-1 mm; the elastic rubber gasket is provided with a convex inclined line.

6. The GFRP bolt joint of claim 1, wherein the inner wall of the first anchor ring and the inner wall of the second anchor ring are each internally threaded.

7. The GFRP bolt joint according to claim 1, wherein a flange is provided on a side of the tab adjacent to the first anchor ring, the flange having an outer diameter larger than a diameter of the clamping hole, and when the first anchor ring and the second anchor ring are clamped, a gap of 1.5-2.5 mm is provided between the first anchor ring and the second anchor ring.