One-hole multi-hole manometer embedding device combined with bag type grouting method

Abstract

The utility model relates to the technical field of geotechnical engineering monitoring, and discloses a one-hole multi-hole manometer embedding device combined with a bag type grouting method, which comprises a plurality of sleeve valve pipes which are screwed end to end, and a first pipe body and a second pipe body which are abutted end to end are arranged in each sleeve valve pipe. The outer wall of the sleeve valve pipe is provided with a liquid outlet and a sliding groove which are communicated with the interior of the first pipe body and the interior of the second pipe body respectively, the sleeve valve pipe is fixedly sleeved with an annular air bag used for wrapping the liquid outlet, and the sleeve valve pipe is movably sleeved with a protective sliding sleeve capable of wrapping the annular air bag. The annular air bags arranged outside the sleeve valve pipes can expand to abut against the inner wall of a drill hole when pressure is built in the sleeve valve pipes, so that the water pressure sensors on the adjacent sleeve valve pipes are located in independent spaces which are not communicated, the annular air bags are wrapped by the protective sliding sleeves before being expanded, and when pressure is not built in the sleeve valve pipes, the annular air bags and the protective sliding sleeves are connected through the protective sliding sleeves. The protective sliding sleeve can protect the annular air bag from being scratched by sharp objects in the drill hole in the burying process.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical engineering monitoring, in particular to an burying device of a single-hole multi-hole piezometer combined with a capsule grouting method. Background Art

[0002] During the construction of geotechnical engineering, pore water pressure gauges are often buried at different depths in the borehole to monitor the changes in pore water pressure in the strata, and the changes in pore water pressure are used to determine whether there are risks in the project.

[0003] Due to the limitations of construction equipment and technology, the method of burying only one piezometer in a borehole is often adopted. Since there is a large horizontal distance between the boreholes, although this burial method can ensure that there is no hydraulic connection between the piezometers, it is impossible to observe the change pattern of pore water pressure along the depth. At the same time, this burial method will significantly increase the construction cost.

[0004] In order to improve the above problems, a construction method of burying multiple piezometers in one hole has been designed in the prior art. The main idea is to be able to install multiple piezometers at different depths on a sleeve valve pipe in a single borehole, and the spaces where different piezometers are located should be disconnected, so as to eliminate the hydraulic connection between different piezometers as much as possible, and ultimately ensure that the monitoring data of different piezometers are more accurate.

[0005] However, it is inevitable that hydraulic connection will occur between multiple piezometers in the same borehole. In order to eliminate the hydraulic connection between the piezometers, the existing technology generally injects grout into the borehole through a sleeve valve tube, and isolates the hydraulic connection between the piezometers after the slurry solidifies. However, the solidified slurry will be precisely bonded to the borehole, making it difficult to recover the sleeve valve tube. Therefore, there is an urgent need for a technical solution that can isolate the hydraulic connection between multiple piezometers in the borehole and facilitate the recovery of the sleeve valve tube. Utility Model Content

[0006] The utility model aims to provide a device for embedding a multi-hole piezometer combined with a bladder grouting method to solve the problems in the prior art.

[0007] In order to solve the above technical problems, the utility model specifically provides the following technical solutions:

[0008] A burying device for a one-hole multi-porous piezometer combined with the capsule grouting method, comprising a plurality of sleeve valves connected end to end in a spiral manner. The inside of the sleeve valve is provided with a first pipe body and a second pipe body abutting end to end. Liquid outlets and chutes are formed on the outer wall of the sleeve valve, which are respectively communicated with the inside of the first pipe body and the second pipe body. An annular airbag for covering the liquid outlet is fixedly sleeved outside the sleeve valve. A protective sliding sleeve capable of covering the annular airbag is movably sleeved outside the sleeve valve. A sliding member is arranged inside the second pipe body. One end of the sliding member passes through the chute and is connected with the protective sliding sleeve, and the other end of the sliding member extends into the inside of the first pipe body and is connected with a piston.

[0009] As a preferred solution of the present utility model, the liquid outlet is circular and communicated with the inside of the first pipe body. The chute is a strip-shaped structure extending along the axial direction of the sleeve valve, and the chute is communicated with the inside of the second pipe body.

[0010] As a preferred solution of the present utility model, a bottom notch communicating with its inside is formed at one end of the first pipe body far away from the second pipe body. A spring for elastically supporting the piston is arranged inside the first pipe body.

[0011] As a preferred solution of the present utility model, the top end of the sliding member passes through the chute and is fixedly connected with the protective sliding sleeve, and the bottom end of the sliding member extends into the inside of the first pipe body and is connected with the piston.

[0012] As a preferred solution of the present utility model, an annular accommodating groove for accommodating the annular airbag is arranged on the inner side of the protective sliding sleeve. A chute partition plate that fits on the outer wall of the sleeve valve and covers the chute is arranged on the protective sliding sleeve.

[0013] As a preferred solution of the present utility model, a water pressure sensor for monitoring the water pressure in the drill hole is installed outside the sleeve valve, and the water pressure sensor is always located above the protective sliding sleeve.

[0014] The present utility model has the following beneficial effects compared with the prior art:

[0015] (1) The annular airbag arranged outside the sleeve valve of the present utility model can expand to abut against the inner wall of the drill hole when the pressure is built up inside the sleeve valve, so that the water pressure sensors on adjacent sleeve valves are respectively in non-communicating independent spaces, thereby blocking the hydraulic connection between any adjacent water pressure sensors. In addition, the annular airbag is covered by the protective sliding sleeve before expansion. When the pressure is not built up inside the sleeve valve, the protective sliding sleeve can protect the annular airbag from being scratched by sharp objects in the drill hole during the burying process. When the pressure is built up inside the sleeve valve, the protective sliding sleeve can be lifted to expose the annular airbag.

[0016] (2)When the annular airbag of the utility model expands and abuts against the drilled hole, the piston cannot be reset. Therefore, when relieving the pressure in the sleeve valve pipe, the liquid in the annular airbag will flow back into the first pipe body under the action of the pressure difference, and then flow back into the sleeve valve pipe from the first pipe body, so as to complete the decompression and shrinkage of the annular airbag. After decompression and shrinkage, the annular airbag no longer abuts against the inner wall of the drilled hole. Therefore, the whole sleeve valve pipe can be gradually taken out from the drilled hole at this time, so as to realize the recycling of the device. Brief Description of the Drawings

[0017] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained according to the provided drawings.

[0018] Figure 1 It is a schematic structural diagram of a single sleeve valve pipe of the present utility model without pressure holding.

[0019] Figure 2 It is a schematic structural diagram of a single sleeve valve pipe of the present utility model with pressure holding.

[0020] Figure 3 It is a partial cross-sectional view of a single sleeve valve pipe of the present utility model without pressure holding.

[0021] Figure 4 It is a partial cross-sectional view of a single sleeve valve pipe of the present utility model with pressure holding.

[0022] Reference Signs:

[0023] 1, sleeve valve pipe; 2, single-port pipe body; 3, sealed pipe body; 4, liquid outlet; 5, chute; 6, annular airbag; 7, protective sliding sleeve; 8, sliding connector; 9, piston;

[0024] 11, water pressure sensor;

[0025] 21, bottom notch; 22, spring;

[0026] 71, annular accommodating groove; 72, chute partition. Detailed Embodiments

[0027] The following will clearly and completely describe the technical solutions of the present utility model in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments.

[0028] The components of the embodiments of the present utility model, which are usually described and shown in the accompanying drawings here, can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model.

[0029] Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present utility model.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] Embodiment

[0032] The following in conjunction with Figures 1 to 4 As shown, the embodiment of the present utility model provides a burying device for a one-hole multi-porous piezometer combined with the bag grouting method, which includes a plurality of sleeve valve pipes 1 connected end to end in a spiral manner. The inside of the sleeve valve pipe 1 is provided with a first pipe body 2 and a second pipe body 3 abutting end to end. Liquid outlets 4 and chutes 5 respectively communicating with the inside of the first pipe body 2 and the second pipe body 3 are opened on the outer wall of the sleeve valve pipe 1. An annular airbag 6 for covering the liquid outlet 4 is fixedly sleeved outside the sleeve valve pipe 1. A protective sliding sleeve 7 capable of covering the annular airbag 6 is movably sleeved outside the sleeve valve pipe 1. A sliding member 8 is arranged inside the second pipe body 3. One end of the sliding member 8 passes through the chute 5 and is connected to the protective sliding sleeve 7, and the other end of the sliding member 8 extends into the inside of the first pipe body 2 and is connected with a piston 9.

[0033] The annular airbag 6 provided outside the sleeve valve pipe 1 of the present utility model can expand to abut against the inner wall of the drilling hole when the pressure is built up inside the sleeve valve pipe 1, so that the water pressure sensors 11 on adjacent sleeve valve pipes 1 are respectively in non-communicating independent spaces, thereby blocking the hydraulic connection between any adjacent water pressure sensors 11. In addition, the annular airbag 6 is covered by the protective sliding sleeve 7 before expansion. When the pressure is not built up inside the sleeve valve pipe 1, the protective sliding sleeve 7 can protect the annular airbag 6 from being scratched by sharp objects in the drilling hole during the burying process. When the pressure is built up inside the sleeve valve pipe 1, the protective sliding sleeve 7 can be lifted to expose the annular airbag 6.

[0034] The annular airbag 6 that abuts against the drilled hole after expansion in the utility model will cause the piston to fail to reset (the bottom end of the protective sliding sleeve 77 will contact the expanded annular airbag 6 and cannot slide down). Therefore, when the pressure in the sleeve valve pipe 1 is relieved, the liquid in the annular airbag 6 will flow back into the first pipe body 2 under the action of the pressure difference, and then flow back from the first pipe body 2 into the sleeve valve pipe 1, thereby completing the decompression and shrinking of the annular airbag 6. After decompression and shrinking, the annular airbag 6 no longer abuts against the inner wall of the drilled hole. Therefore, the entire sleeve valve pipe 1 can be gradually taken out of the drilled hole at this time, so as to realize the recycling of the device.

[0035] Among them, the liquid outlet 4 is circular and communicates with the inside of the first pipe body 2. The chute 5 is a long strip structure extending along the axial direction of the sleeve valve pipe 1, and the chute 5 communicates with the inside of the second pipe body 3.

[0036] One end of the first pipe body 2 far from the second pipe body 3 is provided with a bottom notch 21 communicating with its inside, and a spring 22 for elastically supporting the piston 9 is arranged inside the first pipe body 2.

[0037] Specifically, when the pressure is built up in the sleeve valve pipe 1, the liquid can only enter the first pipe body 2 through the bottom notch 21 and cannot enter the second pipe body 3. When the pressure is not built up in the sleeve valve pipe 1, the piston 9 elastically supported by the spring 22 is in the lowest position close to the bottom notch 21. When the pressure is built up in the sleeve valve pipe 1, the piston 9 moves upward under the action of the pressure difference and compresses the spring 22 until the piston 9 moves upward to expose the liquid outlet 4. At this time, the liquid in the first pipe body 2 can flow into the annular airbag 6.

[0038] Among them, the top end of the sliding connector 8 passes through the chute 5 and is fixedly connected with the protective sliding sleeve 7, and the bottom end of the sliding connector 8 extends into the first pipe body 2 and is connected with the piston 9.

[0039] An annular accommodating groove 71 for accommodating the annular airbag 6 is arranged inside the protective sliding sleeve 7. A chute partition plate 72 that fits on the outer wall of the sleeve valve pipe 1 and covers the chute 5 is arranged on the protective sliding sleeve 7. The annular airbag 6 is not communicated with the inside of the sleeve valve pipe 1 in the initial position of the protective sliding sleeve 7. When the protective sliding sleeve 7 slides upward to no longer accommodate the annular airbag 6, the inside of the annular airbag 6 is communicated with the inside of the sleeve valve pipe 1.

[0040] A water pressure sensor 11 for monitoring the water pressure in the drilled hole is installed outside the sleeve valve pipe 1, and the water pressure sensor 11 is always located above the protective sliding sleeve 7.

[0041] Specifically, when the pressure is built up inside the sleeve valve pipe 1 and causes the piston 9 to move upward, the piston 9 will move upward synchronously with the sliding connector 8. Since the sliding connector 8 passes through the sliding groove 5 and is connected to the protective sliding sleeve 7, when the sliding connector 8 moves upward, it will move upward together with the protective sliding sleeve 7. As the protective sliding sleeve 7 moves upward, the annular airbag 6 covered in the annular accommodating groove 71 will be exposed. When the protective sliding sleeve 7 no longer covers the annular airbag 6, the piston 9 has moved upward to expose the liquid outlet 4 at this time, so that the annular airbag 6 can expand to abut against the inner wall of the drilling hole after continuously flowing in liquid inside. In addition, it is known that the water pressure sensor 11 on a single sleeve valve pipe 1 is located above the annular airbag 6 on this sleeve valve pipe 1. Then it can be known that whether another sleeve valve pipe 1 is connected above or below this sleeve valve pipe 1, there will inevitably be an annular airbag 6 between any two adjacent water pressure sensors 11. Since there is an annular airbag 6 between any two adjacent water pressure sensors 11, when all the annular airbags 6 expand to abut against the inner wall of the drilling hole, the hydraulic connection between the water pressure sensors 11 is also greatly eliminated, thereby making the monitoring data of each water pressure sensor 11 more accurate.

[0042] 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 them; 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 make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A burying device for a one-hole multi-porous piezometer combined with the capsule grouting method, comprising a plurality of sleeve valves (1) screwed end to end, characterized in that: Inside the sleeve valve pipe (1), there are a first pipe body (2) and a second pipe body (3) with their heads and tails abutting against each other. On the outer wall of the sleeve valve pipe (1), there are a liquid outlet (4) and a chute (5) respectively communicating with the inside of the first pipe body (2) and the second pipe body (3). An annular airbag (6) for covering the liquid outlet (4) is fixedly sleeved outside the sleeve valve pipe (1). A protective sliding sleeve (7) capable of covering the annular airbag (6) is movably sleeved outside the sleeve valve pipe (1). Inside the second pipe body (3), there is a sliding connector (8). One end of the sliding connector (8) passes through the chute (5) and is connected to the protective sliding sleeve (7), and the other end of the sliding connector (8) extends into the inside of the first pipe body (2) and is connected to a piston (9).

2. The embedding device of a one-hole multi-porous piezometer combined with the capsule grouting method according to claim 1, characterized in that, The liquid outlet (4) is circular and communicates with the inside of the first pipe body (2). The chute (5) is a long strip structure extending along the axial direction of the sleeve valve pipe (1), and the chute (5) communicates with the inside of the second pipe body (3).

3. The embedding device of a one-hole multi-porous piezometer combined with the capsule grouting method according to claim 2, characterized in that, At one end of the first pipe body (2) away from the second pipe body (3), there is a bottom notch (21) communicating with its inside. Inside the first pipe body (2), there is a spring (22) for elastically supporting the piston (9).

4. The embedding device of a one-hole multi-porous piezometer combined with the capsule grouting method according to claim 3, characterized in that, The top end of the sliding connector (8) passes through the chute (5) and is fixedly connected to the protective sliding sleeve (7), and the bottom end of the sliding connector (8) extends into the inside of the first pipe body (2) and is connected to the piston (9).

5. The embedding device of a one-hole multi-porous piezometer combined with the capsule grouting method according to claim 4, characterized in that Inside the protective sliding sleeve (7), there is an annular accommodating groove (71) for accommodating the annular airbag (6). At the top end of the protective sliding sleeve (7), there is a chute partition plate (72) fitting on the outer wall of the sleeve valve pipe (1) and covering the chute (5).

6. The embedding device of a one-hole multi-porous piezometer combined with the capsule grouting method according to claim 2, characterized in that, A water pressure sensor (11) for monitoring the water pressure in the borehole is installed outside the sleeve valve pipe (1), and the water pressure sensor (11) is always located above the protective sliding sleeve (7).

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