Device for tunnel water seepage detection

Abstract

The utility model discloses a device for tunnel water seepage detection, which relates to the field of tunnel detection equipment and comprises a capacity cylinder, a positioning cover and a chassis, a hollow cavity is formed on the cover wall of the positioning cover, the capacity cylinder is placed in the hollow cavity, the chassis is of a hollow structure, the positioning cover is connected with the chassis, and the hollow cavity is communicated with the hollow structure of the chassis. The capacity cylinder can move into the hollow structure of the chassis from the hollow cavity; the upper end of the volume cylinder is movably connected with a sealing cover which is connected with a force application mechanism; a sealing gasket is arranged at the lower end of the capacity cylinder, and when the capacity cylinder moves into the hollow structure of the base plate, the sealing gasket enables the capacity cylinder and the base plate to be sealed; a screw penetrates through the side face of the positioning cover. According to the utility model, the screws penetrate through the side wall of the positioning cover, and the displacement of the capacity cylinder in the vertical direction is controlled through the screws, so that the capacity cylinder is limited, and the purposes of no need of manual force application for limiting and high air tightness are achieved.

Description

Technical Field

[0001] The utility model relates to the field of tunnel detection equipment, in particular to a device for tunnel water seepage detection. Background Art

[0002] The tunnel water seepage detection device is a technical device specially designed to monitor the moisture situation inside the tunnel. During its service life, the tunnel may be affected by factors such as rising groundwater levels and rainfall. Therefore, timely detection and treatment of water seepage problems are crucial to maintaining the safety of the tunnel structure. As part of the infrastructure, the structural safety of the tunnel is crucial to the normal operation and use of the tunnel. If the water seepage problem is not handled in time, it may cause damage to the tunnel structure and even affect the stability of the surrounding soil. The tunnel seepage may carry pollutants in the underground soil. If it is not monitored and treated in time, it may have an adverse impact on the surrounding environment. Therefore, water seepage detection also involves the aspect of environmental protection. Early detection and treatment of water seepage problems can avoid larger-scale maintenance projects, thereby reducing overall maintenance costs. The introduction of water seepage detection devices helps to achieve cost-effectiveness and extend the service life of tunnels.

[0003] The existing water seepage detection device generally installs a capacity cylinder at the detection part, and after the capacity cylinder is sealed with the tunnel detection surface, liquid is added into the capacity cylinder, and the water seepage situation is evaluated by observing the change of the liquid level in the capacity cylinder. However, during the operation, it is necessary to rely on external force to maintain the seal between the capacity cylinder and the ground, and it also needs to be maintained and observed. If the weak force is applied for too long, the forcer will feel tired, resulting in uneven force or even a significant reduction, which affects the airtightness and leads to low detection accuracy.

[0004] In view of this, this application is hereby filed. Utility Model Content

[0005] The purpose of the utility model is to provide a device for detecting water seepage in a tunnel, which detects water seepage in a tunnel by passing screws through the side wall of a positioning cover and controlling the displacement of a capacity cylinder in a vertical direction through the screws, so as to limit the capacity cylinder and solve the problem of low air tightness in the prior art by limiting the position by manual force.

[0006] The embodiment of the utility model is realized by the following technical scheme: The embodiment of the utility model provides a device for detecting water seepage in a tunnel, comprising a capacity cylinder, a positioning cover and a chassis, wherein the cover wall of the positioning cover forms a hollow chamber, the capacity cylinder is placed in the hollow chamber, the chassis is a hollow structure, the positioning cover is connected to the chassis, the hollow chamber is connected to the hollow structure of the chassis, and the capacity cylinder can move from the hollow chamber to the hollow structure of the chassis;

[0007] The lower end of the capacity cylinder is open, and the upper end is movably connected with a sealing cover, and the sealing cover is connected with a force applying mechanism;

[0008] A sealing gasket is provided at the lower end of the capacity cylinder. When the capacity cylinder moves into the hollow structure of the bottom plate, the sealing gasket keeps the capacity cylinder and the bottom plate sealed.

[0009] A screw passes through the side of the positioning cover. When the screw is rotated, the screw can contact the capacity cylinder and exert horizontal pressure on the capacity cylinder to limit the displacement of the capacity cylinder in the vertical direction.

[0010] Preferably, a groove is provided on the side wall of the capacity cylinder, and when the screw contacts the capacity cylinder, the screw contacts the groove wall of the groove.

[0011] Preferably, a rubber protective layer is provided on the inner wall of the groove.

[0012] Preferably, a sliding block connected to the side wall of the capacity cylinder has a sliding groove arranged in the positioning cover, and when the capacity cylinder moves axially along the positioning cover, the sliding block slides in the sliding groove.

[0013] Preferably, the sliding groove comprises a first sliding arm and a second sliding arm parallel to each other, the first sliding arm is provided with a first slot, the second sliding arm is provided with a second slot, and both the first slot and the second slot extend along the axial direction of the positioning cover;

[0014] The sliding block is provided with a first connecting rod and a second connecting rod, the first connecting rod passes through the first slot, and the second connecting rod passes through the second slot. When the sliding block slides in the sliding slot, the first connecting rod slides in the first slot, and the second connecting rod slides in the second slot.

[0015] The first connecting rod and the second connecting rod are both parallel to the bottom surface of the capacity cylinder.

[0016] Preferably, the capacity cylinder and the positioning cover are both made of transparent material, and scale lines are provided on the outer wall surface of the capacity cylinder.

[0017] Preferably, an observation measuring cylinder is connected to the side wall of the capacity cylinder, the height of the observation measuring cylinder is flush with the top of the capacity cylinder, the observation measuring cylinder is connected to the lower part of the capacity cylinder, and the observation measuring cylinder is made of transparent material.

[0018] Preferably, the observation cylinder is provided with graduation lines.

[0019] Preferably, the observation measuring cylinder is an "L"-shaped structure and includes a transverse cylinder and a vertical cylinder. One end of the transverse cylinder is connected to the capacity cylinder, and the other end is connected to the vertical cylinder. An axial slot is provided on the side wall of the positioning cover, the transverse cylinder passes through the slot, and the vertical cylinder is arranged outside the positioning cover.

[0020] Preferably, the force applying mechanism comprises a force applying rod and a force applying cover, one end of the force applying rod is connected to the sealing cover, and the other end is connected to the force applying cover, and the force applying cover is hemispherical.

[0021] Compared with the prior art, the embodiments of the present invention have the following advantages and beneficial effects:

[0022] 1. An embodiment of the utility model provides a device for detecting water seepage in a tunnel. By placing a capacity cylinder in a positioning cover, the positioning cover can initially limit the capacity cylinder. At the same time, a through screw is arranged on the positioning cover, which can further limit the capacity cylinder when a sealing state is formed between the detection surface and the chassis. This can avoid problems such as artificial limiting, poor sealing due to uneven force or fatigue, and inaccurate detection.

[0023] 2. In the embodiment of the utility model, a groove is arranged on the side wall of the capacity cylinder to provide a concave contact surface for the screw. The concave contact surface can make the screw limiting more stable, improve the air tightness and the accuracy of detection, and the rubber protective layer can increase the friction and protect the cylinder wall of the capacity cylinder from damage.

[0024] 3. The embodiment of the utility model can observe the change of liquid level more clearly by using the principle of communicating vessels through the external leakage setting of the transverse cylinder.

[0025] In general, an embodiment of the utility model provides a device for detecting water seepage in a tunnel, which passes screws through the side wall of the positioning cover and controls the displacement of the capacity cylinder in the vertical direction through the screws, so as to limit the capacity cylinder and achieve the purpose of not requiring manual force to limit the position and having high air tightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a detection device provided in Example 1 of the utility model;

[0028] Figure 2 A schematic diagram of the structure of a detection device provided in Example 2 of the utility model;

[0029] Figure 3 This is a schematic diagram of the sliding groove structure provided in an embodiment of the utility model.

[0030] Marks and corresponding parts names in the attached drawings:

[0031] 1-capacity cylinder, 2-positioning cover, 3-chassis, 4-sealing cover, 5-force mechanism, 6-sealing gasket, 7-screw, 8-groove, 9-sliding block, 10-sliding groove, 11-first sliding arm, 12-second sliding arm, 13-first slot, 14-second slot, 15-first connecting rod, 16-second connecting rod, 17-observation measuring cylinder, 18-horizontal cylinder, 19-vertical cylinder, 20-slot, 21-force rod, 22-force cover. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] Example

[0037] Example 1: Figure 1As shown, the embodiment of the utility model provides a device for detecting water seepage in a tunnel, including a capacity cylinder 1, a positioning cover 2 and a chassis 3. The cover wall of the positioning cover 2 forms a hollow chamber, the capacity cylinder 1 is placed in the hollow chamber, the chassis 3 is a hollow structure, the positioning cover 2 is connected to the chassis 3, the hollow chamber is connected to the hollow structure of the chassis 3, and the capacity cylinder 1 can move from the hollow chamber to the hollow structure of the chassis 3; the capacity cylinder 1 is used to contain liquid, and during the detection process, the water seepage situation is judged by observing the change of the liquid level of the capacity cylinder 1; the capacity cylinder 1 is placed in the positioning cover 2, and is used to preliminarily limit the horizontal displacement distance of the capacity cylinder 1 ; The chassis 3 serves as the bottom base of the entire device, providing stable support to prevent instability and shaking caused by external factors or during operation. During detection, the chassis 3 needs to be placed in contact with the detection surface first. The hollow structure of the chassis 3 serves as the end point of the movement of the capacity cylinder 1. The capacity cylinder 1 contacts the detection surface after entering the hollow structure of the chassis 3, thereby achieving a preparatory detection state in which the cylinder is sealed with the detection surface. When liquid is added to the capacity cylinder 1, the detection state is entered, and the water seepage is judged by observing the degree of change of the liquid level in the capacity cylinder 1. When the liquid level in the capacity cylinder 1 drops quickly, it means that the detection surface is severely seeping.

[0038] The lower end of the capacity cylinder 1 is open, and the upper end is movably connected with a sealing cover 4, and a force-applying mechanism 5 is connected to the sealing cover 4; the lower end of the capacity cylinder 1 is open to ensure that the internal liquid can flow into the detection surface, and the upper end of the sealing cover 4 is to reduce the detection error caused by the volatilization of the liquid during the detection process, and at the same time, it can also prevent impurities from entering the capacity cylinder 1. The force-applying mechanism 5 on the sealing cover 4 can provide the operator with a force-applying point for the capacity cylinder 1 during the detection, and generate pressure on the capacity cylinder 1 on the detection surface, so as to achieve the effect of contact sealing between the capacity cylinder 1 and the detection surface, and maintain air tightness during the tunnel water seepage detection process. The force-applying object here can be a structure such as a support rod, which is not limited here, as long as it can achieve the effect of convenient force application by the operator. As a preferred embodiment of the utility model embodiment, the force-applying mechanism 5 includes a force-applying rod 21 and a force-applying cover 22, one end of the force-applying rod 21 is connected to the sealing cover 4, and the other end is connected to the force-applying cover 22, and the force-applying cover 22 is hemispherical. Specifically, the force rod is connected to one end of the sealing cover 4 at the upper end of the capacity cylinder 1, and the other end is connected to the force-applying cover 22. Through the force-applying rod 21, the force-applying mechanism 5 can apply additional force to the capacity cylinder 1 during the detection process, which helps to ensure the sealing between the sealing cover 4 and the capacity cylinder 1. The hemispherical design of the force-applying cover 22 helps to apply force evenly, while increasing the contact area with the force-applying body and reducing the pressure on the force-applying body.

[0039] A sealing gasket 6 is provided at the lower end of the capacity cylinder 1. When the capacity cylinder 1 moves into the hollow structure of the bottom plate 3, the sealing gasket 6 keeps the capacity cylinder 1 and the bottom plate 3 sealed. The function of the sealing gasket 6 is to create an effective seal when the capacity cylinder 1 contacts the bottom plate 3, preventing moisture or other liquids from penetrating into the capacity cylinder 1 from the hollow structure of the bottom plate 3, and also preventing the liquid in the capacity cylinder 1 from penetrating into the hollow structure or the bottom plate 3. This structure is very important for ensuring the accuracy and reliability of water seepage detection, because if liquid penetrates or seeps out during the detection process, it may lead to misjudgment or affect the detection results.

[0040] A screw 7 penetrates the side of the positioning cover 2. When the screw 7 is rotated, the screw 7 can contact the capacity cylinder 1 and apply pressure in the horizontal direction to the capacity cylinder 1, limiting the displacement of the capacity cylinder 1 in the vertical direction. By rotating the screw 7 on the positioning cover 2, the position where the screw 7 contacts the capacity cylinder 1 can be adjusted, thereby applying additional pressure to the capacity cylinder 1 in the horizontal direction. The design of this structure helps to limit the displacement of the capacity cylinder 1 in the vertical direction, ensuring that the capacity cylinder 1 can maintain a relatively fixed and sealed position during the detection process. By applying pressure in the horizontal direction, the screw 7 of the positioning cover 2 can enhance the stability of the capacity cylinder 1 during the detection process, which is more stable than the effect maintained by manual force, and can also save manpower. This structure is crucial to ensure the accurate positioning of the capacity cylinder 1 and prevent uncontrolled horizontal movement, especially when there may be vibration or other external factors in the tunnel environment.

[0041] In order to improve the engagement stability between the screw 7 and the capacity cylinder 1, a groove 8 is provided on the side wall of the capacity cylinder 1. When the screw 7 contacts the capacity cylinder 1, the screw 7 contacts the groove wall of the groove 8. The presence of the groove 8 can increase the contact area between the screw 7 and the capacity cylinder 1, thereby increasing the friction. This helps to improve the engagement stability between the two and reduce the relative sliding during the detection process. The design of the groove 8 can provide an additional guiding effect, making the position of the screw 7 on the side wall of the capacity cylinder 1 more stable. This structure helps prevent the screw 7 from shifting when in contact, ensuring that it is in full contact with the groove wall of the groove 8, and improving the firmness of the engagement. By ensuring a firm engagement between the screw 7 and the groove 8, pressure in the horizontal direction can be applied more accurately, ensuring that the additional force applied to the capacity cylinder 1 is stable and controllable.

[0042] As a preferred embodiment of the utility model, a rubber protective layer is provided on the inner wall of the groove 8, which can provide a buffering and anti-friction effect between the screw 7 and the inner wall of the groove 8, reduce the wear between the two, and help extend the service life of the device, especially when the device needs to be frequently moved or operated. Rubber has the characteristics of shock absorption and vibration reduction, which can reduce the vibration and noise between the screw 7 and the groove 8, which is beneficial for improving the stability of the device and reducing noise interference during operation, especially in occasions where a quiet environment is required.

[0043] Furthermore, if Figure 3 As shown, a sliding block 9 is connected to the side wall of the capacity cylinder 1, and a sliding groove 10 is provided in the positioning cover 2. When the capacity cylinder 1 moves axially along the positioning cover 2, the sliding block 9 slides in the sliding groove 10. This structure helps to guide and stabilize the axial movement of the capacity cylinder 1 in the positioning cover 2, ensuring its accuracy and stability during the movement. Specifically, the use of the sliding block 9 and the sliding groove 10 can reduce the friction and resistance of the capacity cylinder 1 in the positioning cover 2. By introducing a sliding mechanism between the two, the capacity cylinder 1 can move more smoothly during axial movement, reducing energy loss and operating resistance. The embodiment of the utility model also makes a more detailed design of the sliding structure. Specifically, the sliding groove 10 includes a first sliding arm 11 and a second sliding arm 12 which are parallel to each other. The first sliding arm 11 is provided with a first slot 13, and the second sliding arm 12 is provided with a second slot 14. The first slot 13 and the second slot 14 both extend along the axial direction of the positioning cover 2; the sliding block 9 is provided with a first connecting rod 15 and a second connecting rod 16, the first connecting rod 15 passes through the first slot 13, and the second connecting rod 16 passes through the second slot 14. When the sliding block 9 slides in the sliding groove 10, the first connecting rod 15 slides in the first slot 13, and the second connecting rod 16 slides in the second slot 14; the first connecting rod 15 and the second connecting rod 16 are both parallel to the bottom surface of the capacity cylinder 1.

[0044] This structure realizes the vertical displacement of the entire capacity tube 1 by sliding the connecting rod in the slot. The first sliding arm 11 and the second sliding arm 12 are parallel to each other, which helps to ensure the smooth movement of the sliding block 9 in the sliding slot 10. The parallel structure can reduce unnecessary friction and resistance and improve the efficiency of the system. The first slot 13 and the second slot 14 extend along the axial direction of the positioning cover 2, so that the sliding block 9 can slide freely in the axial direction. The first connecting rod 15 and the second connecting rod 16 pass through the corresponding slots, so that when the sliding block 9 moves in the sliding slot 10, the first connecting rod 15 and the second connecting rod 16 can effectively guide the axial displacement of the sliding block 9. This structure provides a more accurate and stable axial movement mechanism, while also limiting the displacement of the capacity tube 1 in the horizontal direction, thereby improving the reliability and accuracy of the tunnel water seepage detection device during operation.

[0045] In order to more clearly observe the liquid level in the capacity cylinder 1, the capacity cylinder 1 and the positioning cover 2 are both made of transparent materials, and scale lines are set on the outer wall surface of the capacity cylinder 1. This structure can provide more intuitive and real-time information, thereby better meeting the operator's monitoring and operation needs.

[0046] Embodiment 2: The difference from Embodiment 1 is that in Embodiment 2, scale lines may not be set on the capacity cylinder 1, and the capacity cylinder 1 and the positioning cover 2 may not be transparent. The capacity cylinder 1 may be made of relatively strong materials such as stainless steel and iron, because the capacity cylinder 1 needs to withstand external forces in vertical and horizontal directions during operation. In Embodiment 2, Figure 2 As shown, an observation cylinder 17 is connected to the side wall of the capacity cylinder 1. The height of the observation cylinder 17 is level with the top of the capacity cylinder 1. The observation cylinder 17 is connected to the lower part of the capacity cylinder 1, and the observation cylinder 17 is made of a transparent material. That is, in Embodiment 2 of the utility model, the liquid level is observed through an additional observation cylinder. The observation cylinder is connected to the capacity cylinder 1 to form a communicating vessel structure, and the liquid level of the capacity cylinder 1 can be judged by the drop of the liquid level of the observation cylinder. The observation cylinder here can be set inside the positioning cover 2, or it can be exposed to the outside of the positioning cover 2. When the observation cylinder is set inside the positioning cover 2, the positioning cover 2 is made of a transparent material. At this time, the liquid level in the observation cylinder can be observed through the positioning cover 2. Preferably, a scale line is set on the observation cylinder 17.

[0047] When the observation tube leaks out of the positioning cover 2, the positioning cover 2 may not be set to be transparent, and there is no restriction at this time. For example, the observation measuring cylinder 17 may be set to an "L"-shaped structure, and include a horizontal tube 18 and a vertical tube 19. One end of the horizontal tube 18 is connected to the capacity tube 1, and the other end is connected to the vertical tube 19. A slot 20 is axially opened on the side wall of the positioning cover 2. The horizontal tube 18 passes through the slot 20, and the vertical tube 19 is set outside the positioning cover 2. This structure supports the vertical tube 19 on the positioning cover 2 through the horizontal tube 18, and it is necessary to open a slot 20 on the positioning cover 2 to achieve it. During the vertical movement of the observation tube, it will be displaced within the range of the slot 20. This structure sets the vertical tube 19 outside the positioning cover 2, which helps the observer to more easily observe the liquid level changes in the vertical tube 19 without being blocked by the structure of the positioning cover 2.

[0048] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model. It should be noted that the structures or components illustrated in the drawings are not necessarily drawn to scale, and the utility model omits the description of known components and processing technologies and processes to avoid unnecessary limitations on the utility model.

Claims

1. A device for detecting water seepage in a tunnel, comprising a capacity cylinder (1), a positioning cover (2) and a chassis (3), characterized in that: The cover wall of the positioning cover (2) forms a hollow chamber, the capacity cylinder (1) is placed in the hollow chamber, the base plate (3) is a hollow structure, the positioning cover (2) is connected to the base plate (3), the hollow chamber is communicated with the hollow structure of the base plate (3), and the capacity cylinder (1) can move from the hollow chamber into the hollow structure of the base plate (3); The capacity cylinder (1) has an opening at the lower end and a sealing cover (4) movably connected to the upper end, and a force-applying mechanism (5) is connected to the sealing cover (4); A sealing gasket (6) is provided at the lower end of the capacity cylinder (1). When the capacity cylinder (1) moves into the hollow structure of the bottom plate (3), the sealing gasket (6) keeps the capacity cylinder (1) and the bottom plate (3) sealed. A screw (7) passes through the side of the positioning cover (2). When the screw (7) is rotated, the screw (7) can contact the capacity cylinder (1) and exert horizontal pressure on the capacity cylinder (1), thereby limiting the displacement of the capacity cylinder (1) in the vertical direction.

2. The device for detecting water seepage in a tunnel according to claim 1, characterized in that: A groove (8) is provided on the side wall of the capacity cylinder (1), and when the screw (7) contacts the capacity cylinder (1), the screw (7) contacts the groove wall of the groove (8).

3. The device for detecting water seepage in a tunnel according to claim 2, characterized in that: A rubber protective layer is provided on the inner wall of the groove (8).

4. The device for detecting water seepage in a tunnel according to claim 2, characterized in that: A sliding block (9) is connected to the side wall of the capacity cylinder (1), and a sliding groove (10) is arranged in the positioning cover (2). When the capacity cylinder (1) moves axially along the positioning cover (2), the sliding block (9) slides in the sliding groove (10).

5. The device for detecting water seepage in a tunnel according to claim 4, characterized in that: The sliding groove (10) comprises a first sliding arm (11) and a second sliding arm (12) which are parallel to each other, the first sliding arm (11) is provided with a first slot (13), the second sliding arm (12) is provided with a second slot (14), and the first slot (13) and the second slot (14) both extend along the axial direction of the positioning cover (2); The sliding block (9) is provided with a first connecting rod (15) and a second connecting rod (16), the first connecting rod (15) passes through the first slot (13), and the second connecting rod (16) passes through the second slot (14), and when the sliding block (9) slides in the sliding slot (10), the first connecting rod (15) slides in the first slot (13), and the second connecting rod (16) slides in the second slot (14); The first connecting rod (15) and the second connecting rod (16) are both parallel to the bottom surface of the capacity cylinder (1).

6. The device for detecting water seepage in a tunnel according to claim 1, characterized in that: The capacity cylinder (1) and the positioning cover (2) are both made of transparent material, and the outer wall surface of the capacity cylinder (1) is provided with scale lines.

7. The device for detecting water seepage in a tunnel according to claim 1, characterized in that: The side wall of the volume cylinder (1) is connected to an observation measuring cylinder (17), the height of the observation measuring cylinder (17) is flush with the top of the volume cylinder (1), the observation measuring cylinder (17) is connected to the lower part of the volume cylinder (1), and the observation measuring cylinder (17) is made of a transparent material.

8. The device for detecting water seepage in a tunnel according to claim 7, characterized in that: The observation cylinder (17) is provided with scale lines.

9. The device for detecting water seepage in a tunnel according to claim 7, characterized in that: The observation measuring cylinder (17) is of an "L"-shaped structure and comprises a transverse cylinder (18) and a vertical cylinder (19). One end of the transverse cylinder (18) is connected to the capacity cylinder (1), and the other end is connected to the vertical cylinder (19). A slot (20) is axially provided on the side wall of the positioning cover (2). The transverse cylinder (18) passes through the slot (20), and the vertical cylinder (19) is arranged outside the positioning cover (2).

10. The device for detecting water seepage in a tunnel according to claim 1, characterized in that: The force applying mechanism (5) comprises a force applying rod (21) and a force applying cover (22); one end of the force applying rod (21) is connected to the sealing cover (4), and the other end is connected to the force applying cover (22); the force applying cover (22) is hemispherical.

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