Device for detecting external water pressure of fractured rock body

Abstract

The utility model discloses an external water pressure testing device for fractured rock, which is characterized in that one end of a pipe body is a water inlet end capable of being inserted into a water detection hole, one end of the pipe body positioned on the outer side of the water detection hole is a water outlet end, a control valve is arranged at the water outlet end, a water pressure measuring piece is arranged on the pipe body, and the water pressure measuring piece is positioned between the water outlet end and the water inlet end; the plugging mechanism comprises a cone-shaped body and a plugging assembly arranged on the cone-shaped body, the cone-shaped body is adjustably installed on the pipe body, the interior of the cone-shaped body is hollow to form an annular installation cavity for installing the plugging assembly, an annular operation piece is arranged on the cone-shaped body, and the plugging assembly is driven by the annular operation piece to have a plugging state and a storage state. According to the external water pressure testing device for the fractured rock body, the pipe body can be inserted into the water detection hole, the water detection hole is plugged through the plugging mechanism, then the water pressure in the fractured rock body is detected through the control valve and the water pressure measuring piece, and the testing device is simple in structure and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of water pressure detection in fractured rock masses, and particularly to a device for detecting external water pressure in fractured rock masses. Background Art

[0002] Under the action of water (or fluid) pressure in rock mass fractures, the water passing capacity of pores and fractures in the rock mass needs to be evaluated. This characteristic has a significant restrictive effect on the bearing capacity of slopes, underground engineering, and foundation rock masses. The permeability of fractured rock masses is not only affected by factors such as geological structure, lithology, and weathering, but is also closely related to the coupled action of multiple fields such as in-situ stress and temperature.

[0003] In actual engineering, the lining type of a tunnel in a water-rich section needs to be adjusted according to the water flow rate and dynamic water pressure in the rock mass fractures. Although there are already electronic water pressure detection devices that can monitor water pressure in real time, due to the lack of network signals in most tunnels and the constant change of the tunnel face, the electronic water pressure monitoring devices have not been widely used in tunnel cavities. Therefore, in actual operation, advanced water exploration holes are often drilled in the water-rich section of the tunnel, and the water pressure in the exploration holes is measured by traditional water pressure measurement methods to provide relevant data for the design unit to determine the treatment plan. However, the existing water pressure measurement devices for rock mass fractures have complex structures and are prone to various failures in harsh environments, resulting in the failure of measurement. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a device for detecting external water pressure in fractured rock masses to solve the above deficiencies in the prior art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A device for detecting external water pressure in fractured rock masses includes a pipe body that can extend into an exploration hole. One end of the pipe body is an inlet end that can be inserted into the exploration hole, and the end of the pipe body outside the exploration hole is an outlet end. A control valve is arranged on the outlet end, and a water pressure measuring member is arranged on the pipe body, and the water pressure measuring member is located between the outlet end and the inlet end;

[0007] It further includes a sealing mechanism. The sealing mechanism includes a cone body and a sealing component arranged on the cone body. The cone body is adjustably installed on the pipe body. The inside of the cone body is hollow to form an annular installation cavity for installing the sealing component. An annular operating member is arranged on the cone body, and the sealing component is driven by the annular operating member to have a sealing state and a storage state.

[0008] The above-mentioned external water pressure detection device for fractured rock mass, wherein the cone body includes an annular inner wall that can be sleeved on the pipe body, a conical outer wall surrounding the annular inner wall, and a sealing side wall connecting the annular inner wall and the conical outer wall.

[0009] The above-mentioned external water pressure detection device for fractured rock mass, wherein the sealing side wall includes a first annular sealing wall and a second annular sealing wall, and an annular opening is provided on the second annular sealing wall.

[0010] The above-mentioned external water pressure detection device for fractured rock mass, wherein the sealing assembly includes a plurality of arc-shaped sealing plates, and the plurality of arc-shaped sealing plates are sequentially arranged at intervals along the circumferential direction of the annular installation cavity, and an upper rotating connection block and a lower rotating connection block are provided on each of the arc-shaped sealing plates.

[0011] The above-mentioned external water pressure detection device for fractured rock mass, wherein an annular fixing member is provided on the annular inner wall, a lower rotating connection seat is provided on the annular fixing member, and the lower rotating connection block is rotatably installed on the lower rotating connection seat.

[0012] The above-mentioned external water pressure detection device for fractured rock mass further includes a movable sleeve, the movable sleeve is slidably connected to the annular inner wall, an upper rotating connection seat is provided on the movable sleeve, and the upper rotating connection block is connected to the upper rotating connection seat through a connecting rod member.

[0013] The above-mentioned external water pressure detection device for fractured rock mass, wherein the annular sleeve extends out along the annular opening and is connected to the annular operating member, the annular operating member is sleeved on the pipe body, and the movement of the annular operating member along the pipe body can correspondingly drive the annular sleeve to move along the annular inner wall.

[0014] The above-mentioned external water pressure detection device for fractured rock mass further includes a locking assembly, the locking assembly includes a plurality of groups of coaxial fixed rods and movable rods, the fixed rods are fixedly installed on the second annular sealing wall, the movable rods are fixedly installed on the annular operating member, the movable rods are sleeved on the fixed rods, and a locking structure is provided between the movable rods and the fixed rods.

[0015] In the above technical solution, the external water pressure detection device for fractured rock mass provided by the embodiment of the present utility model includes a pipe body that can extend into a water exploration hole and a sealing mechanism. One end of the pipe body can be inserted into the water exploration hole to form a water inlet end, and the end of the pipe body located outside the water exploration hole is the water outlet end. A control valve is arranged on the water outlet end, and a water pressure measuring component is arranged on the pipe body. A sealing component is arranged inside the conical body. Thus, when in use, an advanced water exploration hole is drilled at the fractured rock mass to be detected according to the requirements of the design drawing. The water inlet end of the pipe body is inserted into the water exploration hole, and the water exploration hole is sealed through the sealing mechanism. Subsequently, the water pressure inside the fractured rock mass is detected through the control valve and the water pressure measuring component. The structure of the testing device is simple, the operation is convenient, and it is easy to carry to detect the fractured rock mass at different positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Structural schematic diagram of the external water pressure detection device for fractured rock mass provided by the embodiment of the present utility model;

[0018] Figure 2 Structural schematic diagram of the arc-shaped sealing plate provided by the embodiment of the present utility model;

[0019] Figure 3 Installation schematic diagram of the sealing mechanism provided by the embodiment of the present utility model;

[0020] Figure 4 Top view of the sealing mechanism provided by the embodiment of the present utility model.

[0021] Description of the reference numerals:

[0022] 1. Pipe body; 11. Water inlet end; 12. Water outlet end; 13. Control valve; 2. Water pressure measuring component; 3. Sealing mechanism; 31. Cone body; 310. Annular inner wall; 311. Conical outer wall; 312. First annular sealing wall; 313. Second annular sealing wall; 32. Arc-shaped sealing plate; 320. Upper rotary connection block; 321. Lower rotary connection block; 33. Annular fixing member; 330. Lower rotary connection seat; 34. Movable sleeve; 340. Upper rotary connection seat; 35. Link member; 36. Annular operating member; 37. Locking structure; 38. Movable rod; 39. Fixed rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] like Figures 1-4 As shown, an embodiment of the utility model provides a device for detecting water pressure outside a fractured rock body, comprising a pipe body 1 that can be extended into a water exploration hole and a sealing mechanism 3, wherein one end of the pipe body 1 can be inserted into the water exploration hole to form a water inlet end 11, and the end of the pipe body 1 located outside the water exploration hole is a water outlet end 12, on which a control valve 13 is provided, and a water pressure measuring component 2 is provided on the pipe body 1, and the water pressure measuring component 2 is located between the water outlet end 12 and the water inlet end 11, and the sealing mechanism 3 comprises a cone 31 and a sealing assembly arranged on the cone 31, the cone 31 can be adjustably mounted on the pipe body 1, the inner hollow of the cone 31 forms an annular mounting cavity for mounting the sealing assembly, and an annular operating component 36 is provided on the cone 31, and the sealing assembly receives the drive of the annular operating component 36 and has a sealing state and a collection state.

[0025] Specifically, a water exploration hole is provided on the fractured rock mass to be inspected, and the water exploration hole penetrates into the interior of the fractured rock mass. The pipe body 1 can extend into the interior of the water exploration hole. The pipe body 1 can adopt the steel pipe in the prior art. One end of the pipe body 1 is the water inlet end 11, and the water inlet end 11 can be inserted into the interior of the water exploration hole. The other end of the pipe body 1 is the water outlet end 12. A control valve 13 is provided on the water outlet end 12, and the control valve 13 can control the opening or closing of the water outlet end 12. A water pressure measuring part 2 is provided on the pipe body 1, and the water pressure measuring part 2 is located between the water inlet end 11 and the water outlet end 12. The water pressure measuring part 2 can be a pressure gauge, and the water pressure in the pipe body 1 can be measured by the water pressure measuring part 2.

[0026] In this embodiment, a sealing mechanism 3 is provided on the pipe body 1, and the sealing mechanism 3 is used to seal the water detection hole, so that the pipe body 1 and the water detection hole are fixed. The sealing mechanism 3 includes a cone 31, and the cone 31 is adjustably installed on the pipe body 1, so that the position of the cone 31 on the pipe body 1 can be adjusted as needed. The interior of the cone 31 forms an annular mounting cavity with a ring-shaped cross-section, and the annular mounting cavity can be a conical space. The sealing component is installed in the annular mounting cavity. The sealing component includes a plurality of arc-shaped sealing plates 32, and the plurality of arc-shaped sealing plates 32 are arranged in sequence along the circumference of the annular mounting cavity. An annular operating member 36 is sleeved on the pipe body 1, and each arc-shaped sealing plate 32 is transmission-connected with the annular operating member 36. The sealing component receives the drive of the annular operating member 36 and has two states: a sealing device and a storage state. In the sealing state, each arc-shaped sealing plate 32 is driven to disperse to form a blockage and fixation of the detection hole. In the collection state, each arc-shaped sealing plate 32 is driven to be collected together.

[0027] In this embodiment, during the actual engineering construction process, the actual operation method is as follows:

[0028] In the first step, after water gushing occurs in the fractured rock mass, the tunnel face is sealed, and an over - advance water - exploration hole is drilled using a down - the - hole drill according to the requirements of the design drawings.

[0029] In the second step: Open the control valve 13 at the water outlet end 12 of the pipe body 1 to ensure smooth water flow through the control valve 13, so as to reduce the resistance during the installation of the water pressure measuring device.

[0030] In the third step: Align the pipe body 1 with the water - exploration hole of the tunnel face. When the water pressure is too high and it is difficult for manual installation, use a loader to hold the tail end of the pipe body 1 and push it into the water - exploration hole of the tunnel face, and seal the water - exploration hole through the plugging mechanism 3. The water flows out from the control valve 13, and there is no water leakage at the orifice of the water - exploration hole.

[0031] In the fourth step: Continuously open and close the control valve 13 three times to observe the change of the water pressure gauge. After determining that the water pressure measuring component 2 is fault - free, close the control valve 13 and wait for 30 s to record the pressure of the water pressure measuring component 2. Continuously measure the water pressure at the orifice three times and take the average value as the measured water pressure of the water - exploration hole of the fractured rock mass at the tunnel face.

[0032] The external water pressure detection device for fractured rock masses provided by the embodiment of the present utility model includes a pipe body 1 that can extend into the water - exploration hole and a plugging mechanism 3. One end of the pipe body 1 can be inserted into the water - exploration hole to form a water inlet end 11, and the end of the pipe body 1 located outside the water - exploration hole is a water outlet end 12. A control valve 13 is arranged on the water outlet end 12, and a water pressure measuring component 2 is arranged on the pipe body 1. A plugging assembly is arranged inside the conical body 31. Thus, when in use, an over - advance water - exploration hole is drilled at the location of the fractured rock mass to be detected according to the requirements of the design drawings, the water inlet end 11 of the pipe body 1 is inserted into the water - exploration hole, and the water - exploration hole is plugged through the plugging mechanism 3. Subsequently, the water pressure inside the fractured rock mass is detected through the control valve 13 and the water pressure measuring component 2. The structure of the testing device is simple, the operation is convenient, and it is easy to carry to detect fractured rock masses at different positions.

[0033] In this embodiment, preferably, the conical body 31 includes an annular inner wall 310 that can be sleeved on the pipe body 1, a conical outer wall 311 surrounding the annular inner wall 310, and a plugging side wall connecting the annular inner wall 310 and the conical outer wall 311; the conical outer wall 311 is made of a flexible and elastic material. The plugging side wall includes a first annular plugging wall 312 and a second annular plugging wall 313. The first annular plugging wall 312 and the second annular plugging wall 313 are respectively arranged at opposite ends of the annular inner wall 310. Thus, the annular inner wall 310, the conical outer wall 311, the first annular bottom - sealing wall, and the second annular plugging wall 313 form a sealed annular installation cavity. An annular opening is arranged on the second annular plugging wall 313, and the annular opening is communicated with the annular installation cavity.

[0034] In this embodiment, preferably, the plugging assembly includes a plurality of arc-shaped plugging plates 32. The plurality of arc-shaped plugging plates 32 are sequentially arranged at intervals along the circumferential direction of the annular installation cavity. An upper rotating connection block 320 and a lower rotating connection block 321 are arranged on each arc-shaped plugging plate 32. An annular fixing member 33 is arranged on the annular inner wall 310. The annular fixing member 33 is provided with a lower rotating connection seat 330. The number of the lower rotating connection seats 330 is the same as that of the arc-shaped plugging plates 32. The plurality of lower rotating connection seats 330 are sequentially arranged at intervals along the circumferential direction of the annular fixing member 33. The lower rotating connection block 321 is rotatably installed on the lower rotating connection seat 330.

[0035] In this embodiment, preferably, it further includes a movable sleeve 34. The movable sleeve 34 is slidably connected to the annular inner wall 310. An upper rotating connection seat 340 is arranged on the movable sleeve 34. The number of the upper rotating connection seats 340 is the same as that of the lower rotating connection seats 330. The plurality of upper rotating connection seats 340 are sequentially arranged at intervals along the circumferential direction of the movable sleeve 34. The upper rotating connection seats 340 and the lower rotating connection seats 330 are arranged in one-to-one correspondence. The upper rotating connection block 320 is connected to the upper rotating connection seat 340 through a connecting rod member 35. A limiting structure is arranged between the movable sleeve 34 and the annular inner wall 310 so that the movable sleeve 34 can only move along the axial direction of the pipe body 1. The limiting structure can be a sliding limiting block arranged on the movable sleeve 34. An axial limiting groove is arranged on the annular inner wall 310. The sliding limiting block is slidably connected in the axial limiting groove, so that the movable sleeve 34 can only move along the axial direction of the pipe body 1.

[0036] In this embodiment, preferably, the annular sleeve extends out along the annular opening and is connected to the annular operating member 36. The annular operating member 36 is sleeved on the pipe body 1. When the annular operating member 36 moves along the pipe body 1, it can correspondingly drive the annular sleeve to move along the annular inner wall 310. Thus, when the annular operating member 36 moves along the pipe body 1 towards the conical body 31, the annular operating member 36 and the annular sleeve make each arc-shaped plugging plate 32 move towards the conical outer wall 311 through the connecting rod member 35. Thus, the arc-shaped plugging plate 32 is opened to press against the conical outer wall 311, so that the conical outer wall 311 is fixedly plugged in the water exploration hole. At this time, each arc-shaped plugging plate 32 is in a plugged state. On the contrary, when the annular operating member 36 moves along the pipe body 1 away from the conical body 31, the annular operating member 36 and the annular sleeve make each arc-shaped plugging plate 32 move towards the annular inner wall 310 through the connecting rod member 35. Thus, the arc-shaped plugging plate 32 is collected, and no fixation is formed between the conical body 31 and the water exploration hole. At this time, each arc-shaped plugging plate 32 is in a collected state.

[0037] In this embodiment, preferably, a locking assembly is further included. The locking assembly includes multiple groups of coaxial fixed rods 39 and movable rods 38. The fixed rods 39 are fixedly installed on the second annular sealing wall 313, and the movable rods 38 are fixedly installed on the annular operating member 36. The movable rods 38 are sleeved on the fixed rods 39, and a locking structure 37 is arranged between the movable rods 38 and the fixed rods 39. The number of both the fixed rods 39 and the movable rods 38 is three. The three fixed rods 39 are sequentially arranged at intervals along the circumferential direction of the second annular sealing wall 313, and the three movable rods 38 are sequentially arranged at intervals along the circumferential direction of the annular operating member 36. Moreover, the fixed rods 39 and the movable rods 38 are arranged in one-to-one correspondence and are coaxially arranged. An opening channel is arranged on the movable rod 38, and the opening channel is sleeved on the fixed rod 39. The locking structure 37 includes a locking bolt arranged on the movable rod 38, and multiple locking screw holes are arranged on the fixed rod 39. When the annular operating member 36 moves to make each arc-shaped sealing plate 32 in a sealing state, the locking bolt is correspondingly rotated into the locking screw hole, so that the annular operating member 36 and the arc-shaped sealing plate 32 can be kept in the sealing state. When it is necessary to adjust the arc-shaped sealing plate 32 to the storage state, the locking bolt can be rotated away from the locking screw hole, and thus the operation can be continued.

[0038] Only some exemplary embodiments of the present invention are described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A device for detecting water pressure outside a fractured rock body, comprising a pipe body that can be inserted into a water exploration hole, characterized in that: One end of the tube body is a water inlet end that can be inserted into the water exploration hole, and the end of the tube body located outside the water exploration hole is a water outlet end, a control valve is provided on the water outlet end, and a water pressure measuring component is provided on the tube body, and the water pressure measuring component is located between the water outlet end and the water inlet end; It also includes a sealing mechanism, which includes a cone and a sealing assembly arranged on the cone. The cone can be adjusted on the tube body. The interior of the cone is hollow to form an annular installation cavity for installing the sealing assembly. An annular operating part is arranged on the cone. The sealing assembly is driven by the annular operating part and has a sealing state and a storage state.

2. The device for detecting water pressure outside a fractured rock body according to claim 1, characterized in that: The conical body comprises an annular inner wall which can be sleeved on the tube body, a conical outer wall surrounding the annular inner wall, and a blocking side wall connecting the annular inner wall and the conical outer wall.

3. The device for detecting water pressure outside a fractured rock body according to claim 2, characterized in that: The blocking side wall includes a first annular blocking wall and a second annular blocking wall, and the second annular blocking wall is provided with an annular opening.

4. The device for detecting water pressure outside a fractured rock body according to claim 3, characterized in that: The blocking assembly comprises a plurality of arc-shaped blocking plates, which are arranged in sequence and spaced apart along the circumference of the annular mounting cavity, and each of the arc-shaped blocking plates is provided with an upper rotating connecting block and a lower rotating connecting block.

5. The device for detecting water pressure outside a fractured rock body according to claim 4, characterized in that: An annular fixing piece is arranged on the annular inner wall, and the annular fixing piece is provided with a lower rotating connection seat, and the lower rotating connection block is rotatably mounted on the lower rotating connection seat.

6. The device for detecting water pressure outside a fractured rock body according to claim 5, characterized in that: It also includes a movable sleeve, which is slidably connected to the annular inner wall. An upper rotating connection seat is provided on the movable sleeve, and the upper rotating connection block is connected to the upper rotating connection seat through a connecting rod component.

7. The device for detecting water pressure outside a fractured rock body according to claim 6, characterized in that: The annular sleeve extends out along the annular opening and is connected to the annular operating member, the annular operating member is sleeved on the tube body, and the movement of the annular operating member along the tube body can correspondingly drive the annular sleeve to move along the annular inner wall.

8. The device for detecting water pressure outside a fractured rock body according to claim 7, characterized in that: It also includes a locking assembly, which includes multiple groups of coaxially arranged fixed rods and movable rods, the fixed rods are fixedly installed on the second annular blocking wall, the movable rods are fixedly installed on the annular operating member, the movable rods are sleeved on the fixed rods, and a locking structure is arranged between the movable rods and the fixed rods.

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