CN213740883U

CN213740883U - Grout stopper suitable for super large aperture

Info

Publication number: CN213740883U
Application number: CN202021894543.XU
Authority: CN
Inventors: 刘涛; 刘贵军; 刘均锋; 邓强; 宗蒙茹; 赵倩; 陶奎; 高千园; 李建; 刘祥
Original assignee: Chengdu Hydropower Construction Engineering Co Ltd of Sinohydro Bureau 7 Co Ltd
Current assignee: Chengdu Hydropower Construction Engineering Co Ltd of Sinohydro Bureau 7 Co Ltd
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2021-07-20
Anticipated expiration: 2030-09-02

Abstract

A grouting plug suitable for an ultra-large aperture belongs to the technical field of engineering construction of water conservancy, hydropower, exploration and the like. The grouting pipe comprises a grouting pipe body and a grouting pipe body, wherein the grouting pipe penetrates through the grouting pipe body, the key technology is that the grouting pipe body comprises a fixed end and a sliding head, a high-pressure elastic pipe is arranged between the fixed end and the sliding head, the upper end of the fixed end is a pipe head, and a pressurizing pipe is arranged in the grouting pipe body and beside the grouting pipe. The high-pressure elastic pipe is a high-pressure rubber pipe. The grouting plug with the ultra-large aperture has the following beneficial effects: the high-pressure elastic pipe is arranged between the fixed end and the sliding head, the capsule expands under the action of air pressure or water pressure, the plugging effect is realized by means of expansion pressure and friction force, the blocking pressure of more than 4MPa can be provided, the water pressure of more than 3MPa can be borne, and the problem that large pressure cannot be applied in the water pressure construction of the ultra-large-aperture drilling is solved.

Description

Grout stopper suitable for super large aperture

Technical Field

A grouting plug suitable for an ultra-large aperture belongs to the technical field of engineering construction of water conservancy, hydropower, exploration and the like.

Background

At present, in large-scale concrete hyperbolic arch dam power station engineering, large-aperture concrete drilling coring and water pressing inspection is an important means for inspecting the concrete construction quality. And carrying out a water pressing test through large-aperture drilling, verifying the permeability of concrete and the construction quality of a structural joint surface, finding out construction defects in time, and taking corresponding engineering measures to provide quality guarantee for the safe operation of the dam. As the maximum aperture of the prior domestic grouting plug is phi 165mm, a pressurized water test cannot be combined with a phi 300mm coring hole for construction. A small-aperture water pressure test hole is separately arranged beside an ultra-large-aperture (phi 300mm) concrete core taking hole, and the concrete hyperbolic arch dam ultra-large-aperture concrete core taking water pressure test can not be combined with the large-aperture (phi 300mm) concrete core taking hole for construction. The small-bore pressurized water test hole is independently arranged beside the large-bore (phi 300mm) concrete coring hole, and the following defects exist: firstly, influencing the construction progress; secondly, the construction cost is increased; thirdly, the original large-aperture concrete coring hole sealing construction brings certain difficulty, the quality is difficult to guarantee, and risks are brought to the sealing quality. The problem that the technical personnel are troubled always is the downthehole embolism of core pressurized-water construction is got in extra large aperture drilling, and the super large rubber ball embolism that adopts traditional handicraft processing preparation often the pressure-bearing is low, simultaneously because the pore wall contact surface of rubber ball embolism and drilling concrete is less relatively, destroys the concrete when the card stopper easily, and the card stopper pressure of card stopper in-process is also difficult to control.

Disclosure of Invention

The utility model provides a grout plug of extra-large aperture, the problem that solve provides a grout plug that is applicable to extra-large aperture drilling coring pressurized-water sealing to above not enough. The technical scheme is as follows:

the utility model provides a grout stopper of extra-large aperture, includes grout pipe and grout body, and the grout pipe passes the grout body, and its key technology lies in the grout body and includes stiff end and slip head, installs high-pressure elasticity pipe between stiff end and the slip head, and the stiff end upper end is the tube head, in the grout body, the other pressure tube that sets up of grout pipe.

The high-pressure elastic pipe is a high-pressure rubber pipe.

And the tube head is provided with a hanging ring.

The lower end of the sliding head is fixed with the grouting pipe through a sealing ring.

Compared with the prior art, the grout plug of extra-large aperture has following beneficial effect:

1. a high-pressure elastic pipe is arranged between the fixed end and the sliding head, the capsule expands under the action of air pressure or water pressure, the plugging effect is realized by means of expansion pressure and friction force, the blocking pressure of more than 4MPa can be provided, the water pressure of more than 3MPa can be borne, and the problem that large pressure cannot be applied in the water pressure construction of the ultra-large-aperture drilling is solved;

2. the combination of the fixed end, the sliding head and the high-pressure elastic pipe effectively increases the contact area between the plug and the wall of a drill hole, is not easy to damage the drill hole, can realize effective blocking on the drill hole with the aperture reaching phi 300 mm-phi 325mm, realizes ultra-large aperture grouting, overcomes the influence and risk in large aperture concrete drilling core-taking pressurized-water test construction, and can provide higher blocking pressure than a rubber ball plug;

3. the device overcomes the quality defect caused by the hole sealing of the ultra-large-aperture drilling hole and the defects that the traditional rubber ball device for water pressing and grouting of the ultra-large aperture has low pressure bearing, is easy to damage the wall of the drilling hole and is not easy to control the pressure applying process;

4. the construction method has the advantages of simple and convenient operation during construction, improvement of construction efficiency, reduction of resource investment, improvement of construction quality and solving of the problems of ultra-large aperture water pressing test and grouting.

Description of the drawings:

fig. 1 is a schematic view of an ultra-large pore size grout plug.

The specific implementation mode is as follows:

referring to fig. 1, a grout stopper of extra-large aperture, including grouting pipe 1 and grout body, grouting pipe 1 passes the grout body, and its key technology lies in that grout body includes stiff end 5 and slip head 7, installs high-pressure elastic tube 6 between stiff end 5 and the

slip head

7, and 5 upper ends of stiff end are tube head 4, in the grout body, by grouting pipe 1 setting up pressure tube 2.

The high-pressure elastic pipe 6 is a high-pressure rubber pipe.

And a hanging ring 3 is arranged on the pipe head 4.

The lower end of the sliding head 7 is fixed with the grouting pipe 1 through a sealing ring 8.

The sealing ring 8 is an O-shaped ring.

The work process of the grouting plug with the ultra-large aperture is as follows:

1. the grouting pump is connected with the grouting pipe 1 through a grouting pipe interface screw thread, the pneumatic pump or the hydraulic pump is connected with the pressurizing pipe 2 through a pressurizing pipe interface screw thread, the grouting plug is placed in an orifice (or a steel pipe with one closed end) for pressure test, and when the joint is checked to be free of leakage, the grouting plug is placed in a hole for use;

2. opening a pneumatic pump or a hydraulic pump, pressurizing the pressurizing pipe 2 to ensure that the high-pressure rubber pipe 3 slowly expands, moving the sliding head 7, ensuring that the inflation pressure is greater than 2/3 of the grouting pressure, and pressurizing or grouting when reaching the preset pressure;

3. when pressurized water or grouting begins, when a large amount of water or grout overflows from an orifice grout return pipe, slowly pressurizing to preset grouting pressure in multiple times, and firmly fixing with a grouting pipe 1 through a sealing ring 6, otherwise easily forming larger pressure difference;

4. when the grouting time is long, whether the phenomena of slurry crossing, plug winding and slurry returning exist or not must be checked, if so, grouting is stopped, pressure is released, the grouting plug loosens up and down, and the grouting plug is prevented from being solidified and difficult to take out;

5. when the pressurized water or grouting is finished, the pressurized water or grouting pressure must be released first, and then the pressure of the high-pressure elastic pipe 6 must be released.

The utility model discloses a core pressurized-water test is got in the oversized aperture drilling of dam concrete not only is applicable to, also is applicable to the use of other drilling pressurized-water grouted and the pressurized-water of the pre-buried device of heavy-calibre, grout simultaneously.

Claims

1. The utility model provides a grout stopper of extra-large aperture, includes slip casting pipe (1) and slip casting body, and the slip casting pipe (1) passes the slip casting body, and its characterized in that slip casting body includes stiff end (5) and slip head (7), installs high-pressure elastic tube (6) between stiff end (5) and slip head (7), and stiff end (5) upper end is tube head (4), in the slip casting body, slip casting pipe (1) other pressure tube (2) that set up.

2. An oversized bore plug as claimed in claim 1, characterised in that the high pressure resilient tube (6) is a high pressure rubber tube.

3. The ultra-large aperture grout plug according to claim 1, wherein the pipe head (4) is provided with a hanging ring (3).

4. The ultra-large-aperture grout plug according to claim 1, wherein the lower end of the sliding head (7) is fixed with the grout pipe (1) through a sealing ring (8).

5. An oversized bore plug as claimed in claim 4, characterised in that the sealing ring (8) is an O-ring.