CN219691564U

CN219691564U - Drainage anchor rod suitable for high-pressure underground water section of water-rich tunnel

Info

Publication number: CN219691564U
Application number: CN202320754725.4U
Authority: CN
Inventors: 杨晓慧; 王业义; 杨彪; 陈怀彬; 吴尧; 赵刚; 彭金杰; 韩笑
Original assignee: China Railway Construction Chongqing Investment Group Co ltd; Chongqing Yusui Double Line Expressway Co ltd; China Railway Construction Kunlun Investment Group Co Ltd
Current assignee: China Railway Construction Chongqing Investment Group Co ltd; Chongqing Yusui Double Line Expressway Co ltd; China Railway Construction Kunlun Investment Group Co Ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-09-15
Anticipated expiration: 2033-04-07

Abstract

The utility model discloses a drainage anchor rod suitable for a high-pressure underground water section of a water-rich tunnel, which comprises a drainage pipe, wherein both ends of the drainage pipe are respectively provided with an anchor assembly and a slurry stopping assembly; the drain pipe comprises an outer pipe, a retaining seat and an inner pipe, wherein the inner pipe is coaxially arranged in the outer pipe in a penetrating manner, and the inner pipe and the outer pipe are restrained through the retaining seat; the anchor comprises an anchor head and a filter element, the anchor head is connected with the drain pipe, a drain hole communicated with the inner pipe is formed in the anchor head, an opening between the outer pipe and the inner pipe is plugged by the anchor head, and the filter element is connected with the anchor head and covers the drain hole. The utility model has the remarkable effects that the water blocking capacity of the anchor rod can be improved while the strength of the anchor rod is ensured, the drainage function is taken into account, and the damage of high-pressure underground water to the lining can be effectively relieved.

Description

Drainage anchor rod suitable for high-pressure underground water section of water-rich tunnel

Technical Field

The utility model relates to a tunnel maintenance technology, in particular to a tunnel drainage device.

Background

With the progress of the social and economic technology level of China and the rapid improvement of the comprehensive construction capability of China, the construction of underground projects such as deep-buried long and large traffic tunnels, large hydraulic engineering, underground nuclear waste storage banks, coal mineral resource exploitation and the like can encounter various complicated geological problems, and the problem of damage of high-pressure water to lining is particularly common. If the lining is improperly treated under the condition of high-pressure water, the lining strength, the health and safety of constructors and the normal use of instruments and equipment can be seriously affected. Many specialists at home and abroad gradually realize that the drainage prevention system taking the main drainage or the main blockage is not preferable, and correspondingly, the novel drainage prevention principle taking the main blockage and limiting the drainage is provided, and the novel drainage measure simultaneously comprises the advantages of blockage and drainage, more accords with the treatment requirement of underground water in a tunnel and is gradually used for guiding tunnel engineering construction. Accordingly, new demands are also being made on tunnel drain devices.

Disclosure of Invention

The utility model provides a tunnel drainage device which mainly plays a role in water shutoff, and adopts the main technical scheme as follows:

the utility model provides a drainage stock suitable for rich water tunnel high pressure groundwater section which the key lies in: the grouting device comprises a drain pipe, wherein both ends of the drain pipe are respectively provided with an anchor piece and a slurry stopping assembly;

the drain pipe comprises an outer pipe, a retaining seat and an inner pipe, wherein the inner pipe is coaxially arranged in the outer pipe in a penetrating manner, and the inner pipe and the outer pipe are restrained through the retaining seat;

the anchor comprises an anchor head and a filter element, the anchor head is connected with the drain pipe, a drain hole communicated with the inner pipe is formed in the anchor head, an opening between the outer pipe and the inner pipe is plugged by the anchor head, and the filter element is connected with the anchor head and covers the drain hole.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a schematic cross-sectional structure of fig. 1.

Detailed Description

The utility model is further described below with reference to examples and figures.

As shown in fig. 1 and 2, a drainage anchor rod suitable for a high-pressure groundwater section of a water-rich tunnel comprises a drainage pipe, wherein two ends of the drainage pipe are respectively provided with an anchoring piece and a slurry stopping assembly, one end of the drainage pipe connected with the anchoring piece is a head part, and one end of the drainage pipe connected with the slurry stopping assembly is a tail part;

the drainage pipe comprises an outer pipe 1, a retaining seat 2 and an inner pipe 3, wherein the inner pipe 3 is coaxially arranged in the outer pipe 1 in a penetrating manner, the inner pipe 3 and the outer pipe 1 are restrained by the retaining seat 2, a grouting interlayer is formed by a cavity between the outer pipe 1 and the inner pipe 3, a plurality of retaining seats 2 are abutted against the inner pipe 3 and the outer pipe 1 at the same time so as to keep the inner pipe and the outer pipe 1 in a relatively fixed relationship, and the retaining seats 2 are hollow;

the anchoring piece comprises an anchor head 4 and a filtering piece 5, the anchor head 4 is cylindrical, the anchor head 4 is coaxially and axially connected with the drain pipe, a drain hole communicated with the inner pipe 3 is formed in the anchor head 4, the drain hole and the anchor head 4 are arranged in a concentric line, the anchor head 4 seals an opening of a grouting interlayer between the outer pipe 1 and the inner pipe 3, and the filtering piece 5 is connected with the anchor head 4 and covers the drain hole; at least one grouting hole 4a is formed in the anchor head 4, one end of the grouting hole 4a is opened on the outer side wall of the anchor head 4, and the other end of the grouting hole 4a is communicated with the grouting interlayer;

the filtering piece 5 comprises a slurry stopping plate 51 and filtering cotton 52, the slurry stopping plate 51 is a circular sheet, the slurry stopping plate 51 is attached to the outer end face of the anchor head 4, and the diameter (outer diameter) of the slurry stopping plate 51 is larger than the diameter (outer diameter) of the anchor head 4; the pulp stop plate 51 is provided with a water inlet hole communicated with the water discharge hole, and the filter cotton 52 is stuck to the outer end surface of the pulp stop plate 51.

The slurry stopping assembly comprises a slurry stopping plug 6, an annular gasket 7 and an annular compression cap 8; the grout stop plug 6 is annular, the grout stop plug 6, the annular gasket 7 and the annular compression cap 8 are all sleeved on the drain pipe, and the grout stop plug 6, the annular gasket 7 and the annular compression cap 8 are sequentially far away from the anchor head 4.

More specifically, the outer wall of the outer tube 1 is provided with threads, the annular pressing cap 8 is a nut, the appearance of the grout stop plug 6 is in a shape of a truncated cone, and the side face of the grout stop plug faces the direction of the anchoring piece.

A plurality of radial anchoring drainage seats 10 are axially distributed on the drainage pipe, all the radial anchoring drainage seats 10 are positioned between the anchoring parts and the slurry stopping assembly, the radial anchoring drainage seats 10 are annular, and the radial anchoring drainage seats 10 are fixedly sleeved on the drainage pipe. The radial anchoring drainage seat 10 comprises a guide ring and an abutting ring which are axially connected with each other, the guide ring faces the anchoring piece, the abutting ring faces the slurry stopping assembly, the guide ring is in a circular truncated cone shape, the abutting ring is in a circular ring shape, and the circular truncated cone side face of the guide ring faces the anchoring piece. At least one axial slurry passing hole is penetrated on the radial anchoring water draining seat 10; the diameter of the radial anchoring drainage seat 10 is larger than the diameter of the anchor head 4. The diameter (outer diameter) of the radial anchor drain 10 is equal to the diameter (outer diameter) of the grout stop plate 51

The inner tube 3 is also filled with sponge which can play a role in buffering and adjusting.

The drainage anchor rod is inserted into the tunnel, the head part of the drainage anchor rod stretches into the rock, and the tail part of the drainage anchor rod is connected with a drainage pipe network in the tunnel. Specific:

during installation, an anchor hole is drilled in the inner wall of the tunnel, then a drainage anchor rod is inserted into the anchor hole, the diameter of the radial anchoring drainage seat 10 and the diameter of the grout stop plate 51 are approximately equal to the aperture of the anchor hole and have proper interference, so that the drainage anchor rod is kept basically stable, and the grout stop plug 6 is used for plugging the anchor hole by screwing the annular compression cap 8. And grouting from the tail part of the grouting interlayer, filling the grouting interlayer with slurry and penetrating into the anchor holes from the grouting holes 4a, wherein the hollowed-out retaining seat 2 ensures that the slurry freely flows in the grouting interlayer, the axial slurry passing holes ensure that the slurry freely flows in the anchor holes, and the slurry stopping plate 51 can stop the slurry from flowing to the filter cotton 52. And after the slurry is solidified, water on the inner wall of the tunnel can only enter the inner pipe 3 from the filter cotton 52 for drainage.

The beneficial effects are that: compared with the prior art, the technical scheme of the utility model can improve the water blocking capacity of the anchor rod while ensuring the strength of the anchor rod, and can give consideration to the drainage function, thereby effectively relieving the damage of high-pressure underground water to the lining.

Finally, it should be noted that the above description is only a preferred embodiment of the present utility model, and that many similar changes can be made by those skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The utility model provides a drainage stock suitable for rich water tunnel high pressure groundwater section which characterized in that: the grouting device comprises a drain pipe, wherein both ends of the drain pipe are respectively provided with an anchor piece and a slurry stopping assembly;

the drain pipe comprises an outer pipe (1), a retaining seat (2) and an inner pipe (3), wherein the inner pipe (3) is coaxially arranged in the outer pipe (1) in a penetrating mode, and the inner pipe (3) and the outer pipe (1) are restrained through the retaining seat (2);

the anchoring piece comprises an anchor head (4) and a filtering piece (5), wherein the anchor head (4) is connected with the drain pipe, a drain hole communicated with the inner pipe (3) is formed in the anchor head (4), the opening between the outer pipe (1) and the inner pipe (3) is plugged by the anchor head (4), and the filtering piece (5) is connected with the anchor head (4) and covers the drain hole.

2. The drainage bolt adapted for use in a high pressure groundwater section of a water rich tunnel according to claim 1, wherein: the slurry stopping assembly comprises a slurry stopping plug (6), an annular gasket (7) and an annular compression cap (8);

the grout stop plug (6) is annular, the grout stop plug (6), the annular gasket (7) and the annular compression cap (8) are all sleeved on the drain pipe, and the grout stop plug (6), the annular gasket (7) and the annular compression cap (8) are sequentially far away from the anchor head (4).

3. The drainage bolt adapted for use in a high pressure groundwater section of a water rich tunnel according to claim 1, wherein: a plurality of radial anchoring drainage seats (10) are axially distributed on the drainage pipe, all the radial anchoring drainage seats (10) are positioned between the anchoring parts and the slurry stopping assembly, the radial anchoring drainage seats (10) are annular, and the radial anchoring drainage seats (10) are sleeved on the drainage pipe.

4. A drainage bolt adapted for use in a high pressure groundwater section of a water rich tunnel according to claim 3, wherein: the radial anchoring drainage seat (10) comprises a guide ring and an abutting ring which are axially connected with each other, the guide ring faces the anchoring piece, the abutting ring faces the slurry stopping assembly, the guide ring is in a circular truncated cone shape, the abutting ring is in a circular ring shape, and the circular truncated cone side face of the guide ring faces the anchoring piece.

5. The drainage bolt for a high pressure groundwater section of a water rich tunnel according to claim 3 or 4, wherein: the cavity between the outer pipe (1) and the inner pipe (3) forms a grouting interlayer, the anchor head (4) is cylindrical, and the drainage hole and the anchor head (4) are arranged at the same central line;

at least one grouting hole (4 a) is formed in the anchor head (4), one end of the grouting hole (4 a) is opened on the outer side wall of the anchor head (4), and the other end of the grouting hole (4 a) is communicated with the grouting interlayer;

at least one axial slurry passing hole is penetrated on the radial anchoring drainage seat (10);

the diameter of the radial anchoring drainage seat (10) is larger than that of the anchor head (4).

6. The drainage bolt for a high pressure groundwater section of a water rich tunnel according to claim 1, 2, 3 or 4, wherein: the filtering piece (5) comprises a slurry stopping plate (51) and filtering cotton (52), the slurry stopping plate (51) is a circular sheet, the slurry stopping plate (51) is attached to the outer end face of the anchor head (4), and the diameter of the slurry stopping plate (51) is larger than that of the anchor head (4);

and a water inlet hole communicated with the water drain hole is formed in the slurry stopping plate (51), and the filter cotton (52) is adhered to the outer end surface of the slurry stopping plate (51).

7. The drainage bolt adapted for use in a high pressure groundwater section of a water rich tunnel according to claim 2, wherein: the outer wall of the outer tube (1) is provided with threads, and the annular compression cap (8) is a nut.

8. The drainage bolt for a high pressure groundwater section of a water rich tunnel according to claim 1, 2, 3 or 4, wherein: the inner tube (3) is filled with sponge.