Foundation pit support water seepage detection device

Abstract

The utility model belongs to the technical field of foundation pit support water seepage detection, and discloses a foundation pit support water seepage detection device which comprises a soil layer, an overground observation room is fixedly arranged on the top face of the soil layer, an underground protective sleeve is fixedly arranged on the bottom face of the overground observation room, a limiting sleeve is fixedly arranged in the underground protective sleeve, and a water inlet is formed in the limiting sleeve. A water storage chamber is fixedly arranged on the bottom face of the underground protective sleeve, a first filter screen is fixedly arranged on the bottom face of the water storage chamber, a second filter screen is fixedly arranged in the first filter screen, the interior of the second filter screen communicates with the water storage chamber, and an air bag is slidably arranged in the water storage chamber. When water seepage detection is carried out on the underground enclosure, large-scale excavation work is not needed, meanwhile, damage to the surrounding environment and follow-up treatment work are reduced, and therefore the workload is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit retaining wall seepage detection technology, specifically a foundation pit retaining wall seepage detection device. Background Technology

[0002] The term "foundation pit retaining structure" refers to the methods used to develop and utilize underground space for the construction of various underground buildings such as multi-story basements, subways, and underground commercial streets. These methods include gravity-mixed pile retaining walls, diaphragm walls, and pile-type retaining walls. The goal is not only to ensure the stability of the foundation pit and the safety and convenience of operations within it, but also to control the displacement of the soil at the bottom and outside the pit within a certain range, ensuring the normal use of adjacent buildings and municipal facilities. Since the foundation pit is mainly composed of soil, and soil stability is primarily related to its moisture content, the soil moisture content should be tested after the foundation pit is constructed to determine if the soil is prone to loosening and deformation. While shallow soil is easily tested through sampling, deeper soil is more difficult to assess. In practice, some methods involve direct excavation to collect soil samples, but this is not only extremely labor-intensive but also causes significant environmental damage, further increasing the workload.

[0003] Meanwhile, patent specification CN 217845997 U discloses a seepage detection device for urban tunnel foundation pits based on smart construction sites, including a mounting frame with a control box inside. A set of support plates is fixedly connected to the bottom of each end of the mounting frame. This seepage detection device for urban tunnel foundation pits based on smart construction sites is equipped with a servo motor, a threaded shaft, a rotating groove, a limiting plate, a threaded cylinder, a limiting groove, and a control box. Before detection, the servo motor at the top is activated to drive the threaded shaft to rotate.

[0004] However, in implementing the relevant technology, the above-mentioned urban tunnel foundation pit seepage detection device based on smart construction sites has the following problems: When this utility model detects seepage in the foundation pit, it needs to go deep underground, which will undoubtedly damage the environment of the area. Moreover, the workload of going deep underground for detection is large, and the subsequent treatment of the excavated ground also requires a certain amount of work.

[0005] Therefore, a seepage detection device for foundation pit retaining walls is proposed to address the above-mentioned problems. Summary of the Invention

[0006] To address the problems mentioned in the background art, this utility model provides a seepage detection device for foundation pit retaining walls, which has the advantage of low workload. When conducting seepage detection on underground retaining walls, this utility model eliminates the need for large-scale excavation, thereby reducing workload, improving work efficiency, reducing damage to the surrounding environment and subsequent treatment work, and has a simple structure that only requires the buoyancy of water to perform the detection.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a seepage detection device for foundation pit retaining walls, comprising a soil layer, an above-ground observation chamber fixedly installed on the top surface of the soil layer, an underground protective sleeve fixedly installed on the bottom surface of the above-ground observation chamber, a limiting sleeve fixedly installed inside the underground protective sleeve, a water storage chamber fixedly installed on the bottom surface of the underground protective sleeve, a first filter screen fixedly installed on the bottom surface of the water storage chamber, a second filter screen fixedly installed inside the first filter screen and communicating with the water storage chamber, an airbag slidably installed inside the water storage chamber, a fixed shaft fixedly installed on the top surface of the airbag and slidably connected to the limiting sleeve, a push plate fixedly installed on the top surface of the fixed shaft and slidably connected to the above-ground observation chamber.

[0008] Preferably, a fixing sleeve is fixedly installed on the top surface of the ground observation room, and a solar panel is fixedly installed on the top surface of the fixing sleeve.

[0009] Preferably, a motor is fixedly installed on the top surface of the ground observation room, and the motor operates inside the fixed sleeve.

[0010] Preferably, a motor is fixedly mounted at the end of the main shaft of the motor, a secondary gear is meshed with the outer side of the motor, and a movable plate is rotatably mounted on one side of the secondary gear.

[0011] Preferably, a limiting shaft is provided inside the other side of the movable plate for rotation, and the limiting shaft penetrates the soil layer.

[0012] Preferably, a sand-dredging machine is fixedly installed inside the airbag, and a pipe is fixedly installed on one side of the sand-dredging machine, with the pipe penetrating the first filter screen.

[0013] Preferably, a sand discharge port is provided on one side of the ground observation room, and the sand discharge port is connected to another pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention filters water from the soil layer through a first filter screen, then through a second filter screen. The groundwater then enters the water storage chamber and is propelled upwards by buoyancy. The airbag simultaneously moves the fixed shaft and the push plate upwards. Finally, when the push plate reaches a certain height, it contacts the sensor inside the observation chamber on the ground, triggering an alarm to alert the staff. This invention eliminates the need for large-scale excavation when detecting seepage in underground retaining structures, thus reducing workload, increasing efficiency, minimizing environmental damage and subsequent treatment. Furthermore, its simple structure utilizes only the buoyancy of water for detection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a seepage detection device for foundation pit retaining structure proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the soil layer cross-sectional structure proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the installation structure of the sand dredging machine proposed in this utility model;

[0019] Figure 4 The present utility model proposes Figure 3 A schematic diagram of the structure at point A;

[0020] Figure 5 This is a schematic diagram of the installation structure of the limiting sleeve proposed in this utility model.

[0021] In the diagram: 1. Soil layer; 2. Above-ground observation room; 3. Underground protective sleeve; 4. Water storage chamber; 5. First filter screen; 6. Second filter screen; 7. Airbag; 8. Fixed shaft; 9. Push plate; 10. Limiting sleeve; 11. Motor; 12. Main gear; 13. Secondary gear; 14. Threaded shaft; 15. Moving plate; 16. Sand pumping machine; 17. Pipeline; 18. Sand discharge port; 19. Fixed sleeve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 5As shown, this utility model provides a seepage detection device for foundation pit retaining walls, including a soil layer 1, an above-ground observation chamber 2 fixedly installed on the top surface of the soil layer 1, an underground protective sleeve 3 fixedly installed on the bottom surface of the above-ground observation chamber 2, a limiting sleeve 10 fixedly installed inside the underground protective sleeve 3, a water storage chamber 4 fixedly installed on the bottom surface of the underground protective sleeve 3, a first filter screen 5 fixedly installed on the bottom surface of the water storage chamber 4, a second filter screen 6 fixedly installed inside the first filter screen 5, and the interior of the second filter screen 6 communicating with the water storage chamber 4, an airbag 7 slidably installed inside the water storage chamber 4, a fixed shaft 8 fixedly installed on the top surface of the airbag 7, and the fixed shaft 8 slidably connected to the limiting sleeve 10. A push plate 9 is fixedly installed on the top surface of 8, and the push plate 9 is slidably connected to the ground observation chamber 2. The water inside the soil layer 1 is filtered through the first filter screen 5, and then filtered again through the second filter screen 6. The groundwater then enters the interior of the water storage chamber 4, and the airbag 7 is pushed up by buoyancy. The airbag 7 drives the push plate 9 to move upward. Finally, when the push plate 9 reaches a certain height, it contacts the sensor inside the ground observation chamber 2, and then issues an alarm to alert the staff. This is how to detect seepage in the underground retaining structure. It eliminates the need for large-scale excavation work, reduces damage to the surrounding environment and subsequent treatment work, and improves work efficiency.

[0024] Specifically, a fixed sleeve 19 is fixedly installed on the top surface of the ground observation room 2, and a solar panel is fixedly installed on the top surface of the fixed sleeve 19. The solar panel provides power for the operation of the underground device.

[0025] Furthermore, a motor 11 is fixedly installed on the top surface of the ground observation room 2, and the motor 11 works inside the fixed sleeve 19. The fixed sleeve 19 is also used to protect the motor 11 and its related components.

[0026] Furthermore, the motor 11 is fixedly installed at the end of the main shaft of the motor 11. The outer side of the motor 11 is connected to the auxiliary gear 13. A movable plate 15 is rotatably installed on one side of the auxiliary gear 13. After the alarm is triggered, the switch of the motor 11 is turned on. The motor 11 drives the main gear 12, and finally pushes the push plate 9 through the movable plate 15. If the buoyancy of the water pushes the push plate 9 to rise, then the resistance when the push plate 9 is pushed down is relatively small. If the mud and sand push the push plate 9 to move and rise, then the sand removal work needs to be carried out first.

[0027] It is worth noting that a limiting shaft is provided on the other side of the movable plate 15 for rotation, and the limiting shaft penetrates the soil layer 1. The limiting shaft is mainly to prevent the movable plate 15 from rotating with the threaded shaft 14, thereby limiting its movement.

[0028] It is worth noting that a sand-dredging machine 16 is fixedly installed inside the airbag 7, and a pipe 17 is fixedly installed on one side of the sand-dredging machine 16. The pipe 17 passes through the first filter screen 5, and sand-dredging work can be carried out through the sand-dredging machine 16.

[0029] It is worth mentioning that a sand discharge port 18 is provided on one side of the ground observation room 2, and the sand discharge port 18 is connected to another pipe 17. The sand discharge port 18 is used for sand discharge work.

[0030] Among them, the motor 11 and the sand-dredging machine 16 are existing technologies and will not be described in detail; at the same time, this utility model also includes a power supply, controller, and switch, which are not the main technical points of this patent and will not be described in detail; the "front, back, left, and right" perspectives of this device are as follows: Figure 1 The direction shown in the diagram is the reference.

[0031] Working principle and process:

[0032] Before using a seepage detection device for foundation pit retaining walls, the device is first buried inside the soil layer 1. If seepage occurs underground, the water will be filtered for the first time through the first filter screen 5, and then enter the water storage chamber 4 through the second filter screen 6. As the seepage becomes more severe, the airbag 7 will slowly float up. At the same time, the airbag 7 pushes the fixed shaft 8 and the push plate 9 to move. A limit sleeve 10 is set on the outside of the airbag 7 to limit the movement of the airbag 7. The underground protective sleeve 3 outside the limit sleeve 10 is used for connecting the upper and lower parts of the device. When the push plate 9 moves, it will touch the sensor inside the observation chamber 2 on the ground. This will trigger an alarm, and the staff will start to check the situation. At this time, the switch of the motor 11 inside the fixed sleeve 19 can be turned on. The motor 11 drives the main gear 12, the main gear 12 drives the auxiliary gear 13, and the auxiliary gear 14 drives the auxiliary gear 15. 3 drives the threaded shaft 14 to slide, the threaded shaft 14 pushes the moving plate 15, and the moving plate 15 pushes the push plate 9 at the same time. If the buoyancy of the water pushes the push plate 9 to rise, then the resistance when the push plate 9 is pushed down is relatively small. If the mud and sand push the push plate 9 to move and rise, then the sand removal work needs to be carried out first. Turn on the switch of the sand pumping machine 16, and the sand pumping machine 16 extracts the mud and sand inside the first filter screen 5 through the pipe 17, and finally discharges it through the sand discharge port 18. This device is also equipped with a solar panel to provide power for the underground power device. When conducting seepage detection on underground retaining structures, this utility model does not require large-scale excavation work, thereby reducing the workload, improving work efficiency, reducing damage to the surrounding environment, and reducing subsequent treatment work. Moreover, the structure is simple and only requires the buoyancy of water to conduct the detection.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A seepage detection device for foundation pit retaining walls, characterized in that: The aboveground observation chamber (2) is set on the top surface of the soil layer (1). The bottom surface of the aboveground observation chamber (2) is fixedly provided with an underground protective sleeve (3). The inside of the underground protective sleeve (3) is fixedly provided with a limiting sleeve (10). The bottom surface of the underground protective sleeve (3) is fixedly provided with a water storage chamber (4). The bottom surface of the water storage chamber (4) is fixedly provided with a first filter screen (5). The inside of the first filter screen (5) is fixedly provided with a second filter screen (6), and the inside of the second filter screen (6) is connected to the water storage chamber (4). The inside of the water storage chamber (4) is slidably provided with an airbag (7). The top surface of the airbag (7) is fixedly provided with a fixed shaft (8), and the fixed shaft (8) is slidably connected to the limiting sleeve (10). The top surface of the fixed shaft (8) is fixedly provided with a push plate (9), and the push plate (9) is slidably connected to the aboveground observation chamber (2).

2. The seepage detection device for foundation pit retaining walls according to claim 1, characterized in that: The top surface of the ground observation room (2) is fixedly equipped with a fixing sleeve (19), and the top surface of the fixing sleeve (19) is fixedly equipped with a solar panel.

3. The seepage detection device for foundation pit retaining walls according to claim 2, characterized in that: A motor (11) is fixedly installed on the top surface of the ground observation room (2), and the motor (11) is located inside the fixed sleeve (19).

4. The seepage detection device for foundation pit retaining walls according to claim 3, characterized in that: The main shaft of the motor (11) is fixedly provided with a main gear (12), and the main gear (12) is meshed with a secondary gear (13). A movable plate (15) is rotatably provided on one side of the secondary gear (13).

5. The seepage detection device for foundation pit retaining walls according to claim 4, characterized in that: The other side of the movable plate (15) is provided with a limiting shaft for rotation, and the limiting shaft penetrates the soil layer (1).

6. The seepage detection device for foundation pit retaining walls according to claim 1, characterized in that: A sand-dredging machine (16) is fixedly installed inside the airbag (7), and a pipe (17) is fixedly installed on one side of the sand-dredging machine (16), and the pipe (17) passes through the first filter screen (5).

7. The seepage detection device for foundation pit retaining walls according to claim 6, characterized in that: The ground observation room (2) has a sand discharge port (18) on one side, and the sand discharge port (18) is connected to another pipe (17).

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