Orifice grout stopping device for unbonded anchor cable of underground powerhouse

Abstract

The utility model discloses an orifice grout stopping device for an unbonded anchor cable of an underground powerhouse, and relates to the field of orifice grout stopping of the unbonded anchor cable of the underground powerhouse. Comprising sleeves, cushion blocks and bolts. One end of the sleeve is connected with an annular plate; the other surface of the cushion block is attached to the inner side of the top arch of the underground powerhouse; bolts penetrate through the annular plate and the cushion blocks and then are screwed into the top arch of the underground powerhouse, and the heads of the bolts abut against the annular plate. The sleeve is communicated with a preformed hole where the unbonded anchor cable is located; a sealing piece is arranged at the end, away from the annular plate, of the sleeve and provided with through holes allowing the slurry inlet pipe and the slurry return pipe to penetrate through. The bolt sequentially penetrates through the annular plate and the cushion block and then is screwed into the top arch of the underground powerhouse, so that the sleeve is fixed at the top arch of the underground powerhouse; grouting equipment injects grout into the preformed hole through a grout inlet pipe, and the space where the preformed hole and the sleeve are located is filled with grout; when the grout stably flows out of the grout return pipe under the pressure of the grouting equipment, it means that the grout return pipe is filled with the grout, and the grouting fullness is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of orifice grout stopping for unbonded anchor cables in underground powerhouses, and particularly to an orifice grout stopping device for unbonded anchor cables in underground powerhouses. Background Technique

[0002] Unbonded anchor cables are an important means for geotechnical engineering reinforcement and are particularly important in the application of large-span and high-sidewall caverns such as underground powerhouses. In many underground powerhouse projects, due to the huge scale of the underground powerhouse itself, a large number of unbonded prestressed anchor cables are used for support; this support method is not only simple in construction, only requiring one-time grouting, but also has strong environmental adaptability and good dynamic load resistance performance, mainly relying on the tension of the anchor cables to reinforce the rock mass.

[0003] The grouting of unbonded anchor cables adopts the method of one-time full-hole grouting and bottom-hole backflow grouting, filling the anchorage section and tensioning section of the anchor cable at one time; however, for the anchor cables in the upwardly inclined reserved holes in the underground powerhouse, it is difficult to stop the grout at the orifice section after one-time grouting, the grout is not full, and cavities are likely to appear; the conventional treatment method is to perform secondary supplementary grouting after the anchor cable is tensioned. The secondary supplementary grouting construction wastes a lot of grout, and the grouting fullness cannot be guaranteed either.

[0004] Therefore, it is very important to propose an orifice grout stopping device for unbonded anchor cables in underground powerhouses that can ensure the grouting fullness. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problem that it is difficult to ensure the grouting fullness by the existing grouting method for unbonded anchor cables in the upwardly inclined reserved holes in the underground powerhouse.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is: an orifice grout stopping device for unbonded anchor cables in underground powerhouses, including a sleeve, a cushion block, and a bolt; one end of the sleeve is connected with an annular plate; one side of the cushion block is attached to the annular plate, and the other side is attached to the inner side of the top arch of the underground powerhouse; the bolt sequentially passes through the annular plate and the cushion block and then is screwed into the top arch of the underground powerhouse, and the bolt head abuts against the annular plate; the sleeve is communicated with the reserved hole where the unbonded anchor cable is located;

[0007] A sealing member is provided at the end of the sleeve away from the annular plate, and through holes for the grout inlet pipe and the grout return pipe to pass through are opened on the sealing member.

[0008] Furthermore, it also includes an annular rubber gasket; one side of the annular rubber gasket is attached to the annular plate, and the other side is attached to the cushion block; the bolt also passes through the annular rubber gasket.

[0009] Further, the seal includes a rubber plug, a first circular steel plate, a second circular steel plate, a threaded rod, a first locking nut, and a second locking nut; one side of the rubber plug is attached to the first circular steel plate, and the other side is attached to the second circular steel plate; the threaded rod passes through the first circular steel plate, the rubber plug, and the second circular steel plate in sequence; the first locking nut is threadedly sleeved on the threaded rod and abuts against the first circular steel plate, and the second locking nut is sleeved on the threaded rod and abuts against the second circular steel plate;

[0010] The rubber plug is placed inside the sleeve and at the end of the sleeve away from the annular plate;

[0011] Through holes for the slurry inlet pipe to pass through are provided on the first circular steel plate, the rubber plug, and the second circular steel plate; through holes for the slurry return pipe to pass through are also provided on the first circular steel plate, the rubber plug, and the second circular steel plate.

[0012] Further, it also includes a sleeve; the sleeve is provided with internal threads and is sleeved on the threaded rod; one end of the sleeve is connected to the first locking nut, and the other end abuts against the first circular steel plate; a handle is connected to the first locking nut.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] First, bolts are sequentially passed through the annular plate and the cushion block and then screwed into the crown arch of the underground powerhouse to fix the sleeve at the crown arch of the underground powerhouse; the grouting equipment injects slurry into the reserved hole through the slurry inlet pipe, and the slurry fills the reserved hole and the space where the sleeve is located; when the slurry steadily flows out of the slurry return pipe under the pressure of the grouting equipment, it means that the slurry is full and the grouting fullness is guaranteed. Description of the Drawings

[0015] Figure 1 It is the overall schematic diagram of the present utility model.

[0016] Figure 2 It is the schematic diagram of the rubber plug and the threaded rod of the present utility model.

[0017] Figure 3 It is the detailed schematic diagram of the sleeve and the cushion block of the present utility model.

[0018] The meanings of the reference numerals in the figure are as follows: 1, sleeve; 2, cushion block; 3, annular plate; 4, crown arch of the underground powerhouse; 5, bolt; 6, unbonded cable; 7, reserved hole; 8, slurry inlet pipe; 9, slurry return pipe; 10, annular rubber gasket; 11, rubber plug; 12, first circular steel plate; 13, second circular steel plate; 14, threaded rod; 15, first locking nut; 16, second locking nut; 17, sleeve; 18, handle. Detailed Implementation Modes

[0019] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings of the specification and the specific embodiments. The described embodiments are one of the embodiments of the present utility model, and the present utility model may also have other embodiments.

[0020] Embodiment:

[0021] See Figure 1 、 Figure 3 A hole mouth grout stopping device for unbonded anchor cables in an underground powerhouse of the present utility model includes a sleeve 1, a cushion block 2, and a bolt 5; one end of the sleeve 1 is connected with an annular plate 3; one side of the cushion block 2 is attached to the annular plate 3, and the other side is attached to the inner side of the top arch 4 of the underground powerhouse; the bolt 5 sequentially passes through the annular plate 3 and the cushion block 2 and then is screwed into the top arch 4 of the underground powerhouse, and the head of the bolt 5 abuts against the annular plate 3; the sleeve 1 communicates with the reserved hole 7 where the unbonded anchor cable 6 is located;

[0022] A sealing member is provided at the end of the sleeve 1 away from the annular plate 3, and through holes for the grout inlet pipe 8 and the grout return pipe 9 to pass through are opened on the sealing member.

[0023] In this embodiment, first, the bolt 5 sequentially passes through the annular plate 3 and the cushion block 2 and then is screwed into the top arch 4 of the underground powerhouse, thereby fixing the sleeve 1 at the top arch 4 of the underground powerhouse; the grouting equipment injects grout into the reserved hole 7 through the grout inlet pipe 8, and the grout fills the space where the reserved hole 7 and the sleeve 1 are located; when the grout steadily flows out from the grout return pipe 9 under the pressure of the grouting equipment, it means that the grout is full and the grouting fullness is guaranteed. During this process, one side of the cushion block 2 is attached to the annular plate 3, and the other side is attached to the inner side of the top arch 4 of the underground powerhouse, thereby ensuring the sealing performance at the connection between the sleeve 1 and the reserved hole 7 during the grouting process. The sealing member provided at the other end of the sleeve 1 can be realized by various sealing structures or components in the prior art.

[0024] The cushion block 2 is provided with through holes matching the reserved hole 7, and one end of the sleeve 1 communicates with the reserved hole 7 where the unbonded anchor cable 6 is located through the through holes of the cushion block 2.

[0025] As a preferred embodiment, see Figure 1 、 Figure 3 It further includes an annular rubber gasket 10; one side of the annular rubber gasket 10 is attached to the annular plate 3, and the other side is attached to the cushion block 2; the bolt 5 also passes through the annular rubber gasket 10.

[0026] In this embodiment, when the head of the bolt 5 abuts against the annular plate 3, due to the existence of the annular rubber gasket 10, the sealing performance at the connection between the sleeve 1 and the reserved hole 7 is further improved.

[0027] As a preferred embodiment, see Figure 2, the seal includes a rubber plug 11, a first circular steel plate 12, a second circular steel plate 13, a threaded rod 14, a first locking nut 15, and a second locking nut 16; one side of the rubber plug 11 is in contact with the first circular steel plate 12, and the other side is in contact with the second circular steel plate 13; the threaded rod 14 sequentially passes through the first circular steel plate 12, the rubber plug 11, and the second circular steel plate 13; the first locking nut 15 is threadedly sleeved on the threaded rod 14 and abuts against the first circular steel plate 12, and the second locking nut 16 is sleeved on the threaded rod 14 and abuts against the second circular steel plate 13;

[0028] The rubber plug 11 is placed inside the sleeve 1 and at the end of the sleeve 1 away from the annular plate 3;

[0029] The first circular steel plate 12, the rubber plug 11, and the second circular steel plate 13 are provided with through holes for the slurry inlet pipe 8 to pass through; the first circular steel plate 12, the rubber plug 11, and the second circular steel plate 13 are also provided with through holes for the slurry return pipe 9 to pass through.

[0030] In this embodiment, the operator holds the threaded rod 14 by hand and inserts the rubber plug 11 into the other end of the sleeve 1 to achieve the sealing of the other end of the sleeve 1.

[0031] As a preferred embodiment, refer to Figure 2 , it further includes a sleeve 17; the sleeve 17 is provided with internal threads and is sleeved on the threaded rod 14; one end of the sleeve 17 is connected to the first locking nut 15, and the other end abuts against the first circular steel plate 12; a handle 18 is connected to the first locking nut 15.

[0032] In this embodiment, the operator first inserts the rubber plug 11 into the other end of the sleeve 1, and then rotates the handle 18, so that the first locking nut 15 rotates, driving the sleeve 17 to rotate. After the sleeve 17 abuts against the first circular steel plate 12, the rubber plug 11 is further compressed, making the rubber plug 11 contact the inner wall of the sleeve 1 more closely, thereby further improving the sealing performance of the other end of the sleeve 1.

[0033] The terms "connection", "fixation", and "butt joint" that appear in the description of the present utility model can be fixed connection, machining, welding, or mechanical connection. The specific meanings of the above terms in the present utility model should be understood according to the specific situation.

[0034] In the description of the present utility model, the terms "inner", "upper", "lower", "end", "side", "outer", etc. indicate the orientation or positional relationship only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying a specific orientation that the device or element must have. Therefore, it cannot be understood as a limitation to the present utility model.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hole stop grouting device for unbonded anchor cables in underground powerhouses, characterized in that: It comprises a sleeve (1), a cushion block (2), and a bolt (5); one end of the sleeve (1) is connected to a ring plate (3); one side of the cushion block (2) is in contact with the ring plate (3), and the other side is in contact with the inner side of the underground powerhouse top arch (4); the bolt (5) passes through the ring plate (3) and the cushion block (2) in sequence and is then screwed into the underground powerhouse top arch (4), with the head of the bolt (5) being pressed against the ring plate (3); the sleeve (1) is connected to a reserved hole (7) where the non-bonded anchor cable (6) is located; A sealing member is provided at one end of the sleeve (1) away from the annular plate (3), and a through hole is provided on the sealing member for the pulp inlet pipe (8) and the pulp return pipe (9) to pass through.

2. A hole stop grouting device for unbonded anchor cables in underground powerhouses according to claim 1, characterized in that: It also includes an annular rubber gasket (10); one side of the annular rubber gasket (10) is in contact with the annular plate (3), and the other side is in contact with the gasket (2); and the bolt (5) also passes through the annular rubber gasket (10).

3. The hole stop grouting device for unbonded anchor cables in underground powerhouses according to claim 1, characterized in that: The sealing member comprises a rubber plug (11), a first round steel plate (12), a second round steel plate (13), a threaded rod (14), a first locking nut (15), and a second locking nut (16); one side of the rubber plug (11) is in contact with the first round steel plate (12), and the other side is in contact with the second round steel plate (13); the threaded rod (14) passes through the first round steel plate (12), the rubber plug (11), and the second round steel plate (13) in sequence; the first locking nut (15) is threadedly sleeved on the threaded rod (14) and pressed against the first round steel plate (12); the second locking nut (16) is sleeved on the threaded rod (14) and pressed against the second round steel plate (13); The rubber plug (11) is placed in the sleeve (1) and is located at an end of the sleeve (1) away from the annular plate (3); The first circular steel plate (12), the rubber plug (11) and the second circular steel plate (13) are provided with through holes for the pulp inlet pipe (8) to pass through; the first circular steel plate (12), the rubber plug (11) and the second circular steel plate (13) are also provided with through holes for the pulp return pipe (9) to pass through.

4. A hole stop grouting device for unbonded anchor cables in underground powerhouses according to claim 3, characterized in that: It also includes a sleeve (17); the sleeve (17) is provided with an internal thread and is sleeved on the threaded rod (14); one end of the sleeve (17) is connected to the first locking nut (15) and the other end abuts against the first round steel plate (12); and a handle (18) is connected to the first locking nut (15).

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