Underground phreatic water level monitoring device for airport reconstruction and extension

Abstract

The utility model provides an underground phreatic water level monitoring device for airport reconstruction and extension. The underground phreatic water level monitoring device comprises an outer observation pipe and an inner observation pipe, an observation hole is formed in the ground; the outer observation pipe is placed in the observation hole, and gravel and clay balls are sequentially arranged in gaps of the observation hole to form a gravel permeable layer and a clay ball water-resisting layer; the inner observation pipe is arranged in the outer observation pipe; a sealing cover is arranged at the end part of the outer observation pipe; underground water can enter the inner observation pipe through the outer observation pipe, and underground water level measurement is completed. The water level observation hole can solve the problem of surface collapse at the water level observation hole due to hole wall collapse.

Description

Technical Field

[0001] The utility model belongs to the field of water level monitoring, in particular to an underground diving water level monitoring device for airport reconstruction and expansion. Background Art

[0002] Under normal circumstances, underground water level monitoring and measurement within existing airport flight zones requires drilling a water level observation hole. Measurements can only be taken after the water level stabilizes. However, in most clay soil areas, this can take over eight hours for the water level to stabilize. However, due to operational needs of airport flight zones, drilling water level observation holes with large borehole diameters can cause ground subsidence at the water level observation hole due to wall collapse during periods of stable water levels. This poses a safety hazard to the flight zone and cannot be maintained in the long term. Utility Model Content

[0003] In view of this, the utility model aims to propose an underground diving water level monitoring device for airport renovation and expansion, so as to solve the problem of ground subsidence at the water level observation hole caused by hole wall collapse.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0005] An underground diving water level monitoring device for airport renovation and expansion includes an outer observation tube and an inner observation tube;

[0006] An observation hole is set on the ground; the external observation tube is placed in the observation hole, and gravel and clay balls are sequentially placed in the gap of the observation hole to form a gravel permeable layer and a clay ball water-proof layer;

[0007] The inner observation tube is arranged in the outer observation tube; the end of the outer observation tube is provided with a sealing cover;

[0008] Groundwater can enter the inner observation pipe through the outer observation pipe to complete the groundwater level measurement.

[0009] Furthermore, the bottom of the observation hole is 2m-2.5m below the underground diving water level; the diameter of the observation hole ranges from 130mm to 140mm.

[0010] Furthermore, the top of the external observation tube is exposed to the ground in a range of 15 cm to 40 cm.

[0011] Furthermore, a plurality of centralizing plates are sleeved on the inner observation tube, and the inner observation tube is installed inside the outer observation tube through the centralizing plates, and the bottom of the inner observation tube contacts the bottom of the outer observation tube; the length of the inner observation tube is shorter than that of the outer observation tube.

[0012] Furthermore, a through hole for the inner observation tube to pass through is provided at the center of the centralizing plate, and a plurality of plate air holes distributed in an annular shape relative to the through hole are also provided on the centralizing plate.

[0013] Furthermore, the external observation tube is divided into an upper sealing section, a breathable section, a lower sealing section and a water permeable section from top to bottom;

[0014] The upper sealing section is a pipe structure used to maintain the strength of the pipe wall and install the sealing cover;

[0015] The annular surface of the ventilation section is provided with a plurality of ventilation holes for keeping the air pressure in the tube consistent with the atmospheric pressure;

[0016] The lower sealing section is a pipe structure, which is used to prevent surface water from entering the external observation pipe;

[0017] The annular surface of the water-permeable section is provided with a plurality of water-permeable holes for achieving water permeability with groundwater.

[0018] Furthermore, the inner observation tube is provided with a water-permeable hole as a whole, and the inner diameter of the inner observation tube is 3cm-3.5cm; the inner diameter of the outer observation tube is 7cm-7.5cm.

[0019] Furthermore, the particle size of the gravel is 1 cm, and the particle size of the clay ball is 1.5 cm;

[0020] The top surface of the gravel aquifer is 40-45 cm below the ground surface; the top surface of the clay ball aquiclude is flush with the ground surface.

[0021] Compared with the existing technology, the underground diving water level monitoring device for airport renovation and expansion described in the utility model has the following advantages:

[0022] This utility model is a submersible water level monitoring device for airport renovation and expansion. The water level observation hole is constructed in a single visit, eliminating the need for a secondary visit for backfilling. Because the buried observation pipe has a small diameter, clay and gravel are used in layers to backfill the surrounding area, effectively preventing the collapse of the water level observation hole wall. The observation pipe remains in place for long periods of time, allowing for regular groundwater level monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of an underground submerged water level monitoring device for airport renovation and expansion according to an embodiment of the present utility model;

[0025] Figure 2 Schematic diagram of the inner observation tube (left) and the outer observation tube (right) according to an embodiment of the present utility model;

[0026] Figure 3This is a schematic diagram of the centralizing plate described in an embodiment of the present utility model.

[0027] Description of reference numerals:

[0028] 1. External observation tube; 11. Upper sealing section; 12. Breathing section; 13. Lower sealing section; 14. Permeable section; 2. Internal observation tube; 3. Observation hole; 4. Gravel aquifer; 5. Clay ball aquiclude; 6. Sealing cover; 7. Underground water level line; 8. Righting plate; 81. Through hole; 82. Plate breather hole; 9. Horizon line. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0033] An underground diving water level monitoring device for airport renovation and expansion, such as Figure 1-Figure 3As shown, it includes an outer observation tube 1 and an inner observation tube 2; an observation hole 3 is set on the ground; the outer observation tube 1 is placed in the observation hole 3, and gravel and clay balls are sequentially placed in the gap of the observation hole 3 to form a gravel permeable layer 4 and a clay ball waterproof layer 5;

[0034] The inner observation tube 2 is arranged in the outer observation tube 1; the end of the outer observation tube 1 is provided with a sealing cover 6; the sealing cover 6 is made of a hard material and is usually tightly covered on the top of the outer observation tube 1 to prevent rainwater from entering the observation tube. It is removed when in use.

[0035] Groundwater can enter the inner observation pipe 2 through the outer observation pipe 1 to complete the groundwater level measurement.

[0036] Preferably, the bottom of the observation hole 3 is 72m-2.5m lower than the underground phreatic water level; the diameter of the observation hole 3 is in the range of 130mm-140mm.

[0037] Preferably, the top of the external observation tube 1 is exposed to the ground in a range of 15 cm to 40 cm.

[0038] Preferably, a plurality of centralizing plates 8 are sleeved on the inner observation tube 2, and the inner observation tube 2 is installed inside the outer observation tube 1 through the centralizing plates 8 to ensure that the inner observation tube 2 is vertical and the bottom of the inner observation tube 2 contacts the bottom of the outer observation tube 1; the length of the inner observation tube 2 is shorter than that of the outer observation tube 1;

[0039] like Figure 1 As shown, the centralizing plates 8 are evenly distributed and are made of a hard material, providing a fixed position limiting function.

[0040] Preferably, a through hole 81 for the inner observation tube 2 to pass through is provided at the center of the centralizing plate 8 , and a plurality of plate air holes 82 distributed in an annular shape relative to the through hole 81 are further provided on the centralizing plate 8 .

[0041] Preferably, the external observation tube 1 is divided into an upper sealing section 11, a breathable section 12, a lower sealing section 13 and a water permeable section 14 from top to bottom;

[0042] The upper sealing section 11 is a pipe body structure, which is used to maintain the strength of the pipe wall and install the sealing cover 6; the annular surface of the breathable section 12 is provided with a plurality of breathable holes, which are used to keep the air pressure in the pipe consistent with the atmosphere; the lower sealing section 13 is a pipe body structure, which is used to prevent surface water from entering the external observation pipe 1; the annular surface of the water permeable section 14 is provided with a plurality of water permeable holes, which are used to achieve water permeability between the pipe and the groundwater.

[0043] Preferably, the inner observation tube 2 is provided with a water-permeable hole as a whole, and the inner diameter of the inner observation tube 2 is 3 cm; the inner diameter of the outer observation tube 1 is 7 cm; the entire pipe body is a water-permeable section 14, and groundwater can flow freely in the gravel, the outer observation tube 1 and the inner observation tube 2, and keep the water level consistent.

[0044] Preferably, the particle size of the gravel is 1 cm, and the particle size of the clay ball is 1.5 cm;

[0045] The top surface of the gravel aquifer 4 is 40-45 cm below the ground surface; the top surface of the clay ball aquiclude 5 is flush with the ground surface.

[0046] Directions:

[0047] 1. Select the location of observation hole 3;

[0048] 2. Put the inner observation tube 2 straightening plate 8 on the outer spacer of the inner observation tube 2 respectively;

[0049] 3. Insert the inner observation tube 2 with the centralizing plate 8 gradually into the outer observation tube 1, and keep the bottoms of the inner and outer tubes aligned, with the top of the inner observation tube 2 slightly lower than the outer observation tube 1;

[0050] 4. Use a drilling rig to construct observation hole 3 at the selected observation hole 3 location, with a diameter of 130 mm, and drill into the ground about 2 m below the groundwater level line 7;

[0051] 5. Vertically sink the installed observation tube into the bottom of the completed borehole and center it. Use 1 cm diameter gravel to fill the space between the external observation tube 1 and the borehole wall in layers to 40 cm below the ground surface.

[0052] 6. Then use clay balls with a diameter of about 1.5 cm to backfill the ground layer by layer, leaving the observation tube about 15-40 cm above the ground;

[0053] 7. Cover the external observation tube 1 with the sealing cover 6;

[0054] 8. When measuring the groundwater level, remove the sealing cover 6 of the outer observation tube 1, and gradually insert the steel ruler water level gauge probe from the top of the inner observation tube 2. Measure the groundwater level according to the measurement requirements of the steel ruler water level gauge. After completion, take out the steel ruler water level gauge probe, cover the sealing cover 6 of the outer observation tube 1, and complete the groundwater level measurement.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An underground diving water level monitoring device for airport reconstruction and expansion, characterized by: It includes an outer observation tube and an inner observation tube; An observation hole is set on the ground; the external observation tube is placed in the observation hole, and gravel and clay balls are sequentially set in the gap of the observation hole to form a gravel permeable layer and a clay ball waterproof layer; The inner observation tube is arranged in the outer observation tube; a sealing cover is arranged at the end of the outer observation tube; Groundwater can enter the inner observation pipe through the outer observation pipe to complete the groundwater level measurement.

2. The underground diving water level monitoring device for airport reconstruction and expansion according to claim 1 is characterized by: The bottom of the observation hole is 2m-2.5m below the underground diving water level; the diameter range of the observation hole is 130mm-140mm.

3. The underground diving water level monitoring device for airport reconstruction and expansion according to claim 1 is characterized by: The top of the external observation tube is exposed to the ground in a range of 15cm-40cm.

4. The underground diving water level monitoring device for airport reconstruction and expansion according to claim 1 is characterized by: The inner observation tube is sleeved with a plurality of stabilizing plates, and the inner observation tube is installed inside the outer observation tube through the stabilizing plates, and the bottom of the inner observation tube contacts the bottom of the outer observation tube; the length of the inner observation tube is shorter than that of the outer observation tube.

5. The underground diving water level monitoring device for airport reconstruction and expansion according to claim 4 is characterized by: A through hole for the inner observation tube to pass through is arranged at the center of the centralizing plate, and a plurality of plate air holes which are distributed in an annular shape relative to the through hole are also arranged on the centralizing plate.

6. The underground diving water level monitoring device for airport reconstruction and expansion according to claim 1 is characterized by: The external observation tube is divided into an upper sealing section, a ventilating section, a lower sealing section and a water permeable section from top to bottom; The upper sealing section is a pipe body structure, which is used to maintain the strength of the pipe wall and install the sealing cover; The annular surface of the air-permeable section is provided with a plurality of air-permeable holes for keeping the air pressure in the tube consistent with the atmosphere; The lower sealing section is a pipe structure, which is used to prevent surface water from entering the external observation pipe; The annular surface of the water-permeable section is provided with a plurality of water-permeable holes for achieving water permeability with groundwater.

7. The underground diving water level monitoring device for airport reconstruction and expansion according to claim 1 is characterized by: The inner observation tube is provided with a water-permeable hole as a whole, and the inner diameter of the inner observation tube is 3cm-3.5cm; the inner diameter of the outer observation tube is 7cm-7.5cm.

8. The underground diving water level monitoring device for airport reconstruction and expansion according to claim 1 is characterized by: The particle size of the gravel is 1 cm, and the particle size of the clay ball is 1.5 cm; The top surface of the gravel permeable layer is 40-45 cm below the ground surface; the top surface of the clay ball waterproof layer is flush with the ground surface.

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