Water lifting type tubular micro water test device and micro water test method

Abstract

The present application relates to a kind of water lifting type tubular micro water test device and micro water test method.The device includes static pressure pipe, rigid water permeable structure, water lifting cylinder, water level gauge and acquisition instrument.The bottom of static pressure pipe is connected with rigid water permeable structure, and is pressed into target aquifer under the action of static pressure pipe equipment;water lifting cylinder can be lifted in static pressure pipe, is provided with water container and check valve, and ensures that water can only flow into water container in one direction without backflow when taking water;water level gauge is located at the bottom of water lifting cylinder, data line passes through water container and is connected with acquisition instrument, and is used to collect water level change data.The test method includes static pressure into soil, lowering water level gauge, lowering water lifting cylinder, water lifting recovery and calculating hydrogeological parameters.The present application avoids drilling and well completion process, simplifies construction steps, reduces cost, reduces disturbance to underground water environment, and improves test efficiency.

Description

Technical Field

[0001] This invention relates to micro-water testing, specifically to a water-lifting tubular micro-water testing device and a micro-water testing method. Background Technology

[0002] Micro-water testing, as a method of hydrogeological exploration, observes changes in water level within a borehole through a specific water level stimulation method, and calculates hydrogeological parameters by fitting the data. It features simple equipment, easy operation, short testing cycle, and minimal disturbance to the groundwater environment.

[0003] Micro-water tests need to be conducted in test wells, and a single test well can only test the hydrogeological parameters of a single target aquifer. For different aquifers, multiple test wells still need to be constructed for separate testing. The construction of test wells for micro-water tests involves procedures such as borehole drilling, casing installation, filter media filling, and well flushing. The well construction process is complex, and casing retrieval is inconvenient. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, a water-lifting tubular micro-water testing device and its usage method are provided. This technology involves inserting a probe with a permeable front end into the target aquifer. Inside the probe, a water-lifting cylinder extracts a portion of the water, lowering the water level. The water level recovery is then monitored using an internal water level gauge, and hydrogeological parameters are calculated. This method solves the problems of high well construction costs, cumbersome procedures, and poor water level activation performance in micro-water testing. The specific scheme is as follows:

[0005] A water-lifting tubular micro-water testing device, comprising a static pressure tube, a rigid permeable structure, a water-lifting cylinder, a water level gauge, and a data acquisition instrument;

[0006] A rigid permeable structure is connected to the bottom of the static pressure pipe, and the rigid permeable structure is pressed into the target aquifer under the action of the static pressure pipe equipment.

[0007] The water lifting cylinder is installed inside the static pressure pipe and includes a water container and a one-way valve. The water container has a through hole in the center and multiple second water permeable holes at the bottom. The second water permeable holes are connected to the one-way valve.

[0008] The water level gauge is located at the bottom of the water lifting cylinder. The data cable of the water level gauge passes through the through hole of the water container and is connected to the data acquisition instrument, which collects and records the water level change data.

[0009] The one-way valve controls water to flow only into the water container from the static pressure pipe, preventing backflow when the water container is lifted.

[0010] Furthermore, the rigid permeable structure is a permeable metallic stone.

[0011] Furthermore, the static pressure pipe is a single section of pipe pile or is composed of multiple sections of pipe piles that can be detached from each other.

[0012] Furthermore, the bottom of the rigid permeable structure is connected to a conical tube shoe.

[0013] Furthermore, the bottom plate of the water container is provided with several first water permeable holes, and a pressure plate is sealed and connected to the inner wall of the water lifting cylinder. The pressure plate has a through hole in the center and several second water permeable holes are provided around the through hole. The second water permeable holes coincide with the first water permeable holes one by one in the axial direction.

[0014] Multiple one-way valves, corresponding to the positions of the first and second water permeable holes, are provided between the pressure plate and the bottom plate of the water lifting cylinder. Each one-way valve, from bottom to top, consists of a baffle plate, a return spring, and a spring support. The upper and lower ends of the return spring are connected to the baffle plate and the spring support, respectively.

[0015] The spring support is a hollow cap that is upside down at the bottom of the through hole, and several support permeable holes are opened on the side wall of the hollow cap.

[0016] Furthermore, a lifting device is connected to the top of the water-lifting cylinder, and a counterweight is fixed to the bottom of the water-lifting cylinder. The counterweight has a through hole that coincides with the first water-permeable hole.

[0017] Furthermore, the water baffle is a disc-shaped metal plate with a diameter larger than that of the first water-permeable hole.

[0018] Furthermore, a sealing ring is provided between the data cable of the water level gauge and the through hole.

[0019] A method for testing micro-water based on the above-mentioned water-lifting tubular micro-water testing device includes the following steps:

[0020] S1. Static pressure buried structure assembly: Install the rigid permeable structure at the bottom of the static pressure pipe;

[0021] S2. Static pressure penetration: Using static pressure pipe pressing equipment to press a rigid permeable structure into the target aquifer;

[0022] S3. Data acquisition device connection: After the pressure pipe is completed, lower the water level gauge, and let its data cable pass through the through hole of the water container and connect it to the data acquisition device.

[0023] S4. Pressurized water storage: Lower the water pump and maintain it at a predetermined depth. The data acquisition instrument obtains and records the static water level.

[0024] S5. Water level recovery: Pull up the water lifting cylinder to cause the water level in the static pressure pipe to drop instantaneously and gradually recover. The data acquisition instrument obtains and records the dynamic water level.

[0025] S6. Calculation of hydrogeological parameters: Based on the recovery curve of water level over time, the hydrogeological parameters of the target aquifer are calculated.

[0026] The technical advantages of this invention are as follows:

[0027] 1. Avoid well-drilling procedures and reduce construction costs: This invention uses static pressure pipes and rigid permeable structures to directly press into the target aquifer for testing, eliminating the need for complex procedures such as drilling, filling filter media, and well washing. This avoids the generation of waste mud, shortens the construction cycle, and significantly reduces construction costs.

[0028] 2. Simple structure and flexible installation: The static pressure pipe can be a single section of pipe pile or multiple sections of detachable pipe pile, which can flexibly adapt to different strata depths, facilitate transportation and on-site construction, and improve the adaptability and flexibility of the device.

[0029] 3. Stable permeability, pressure resistance and corrosion resistance: The rigid permeable structure is preferably made of permeable metal stone, which has good permeability uniformity, pressure resistance and corrosion resistance, ensuring the stability of water level activation and recovery during the test and improving the accuracy of test data.

[0030] 4. The water lifting cylinder is reasonably designed to ensure one-way water intake: The water lifting cylinder is equipped with a water container and a one-way valve, which can ensure that water can only enter the water container from the static pressure pipe, prevent backflow during the lifting process, significantly stimulate the water level, and enhance the reliability of the test.

[0031] 5. Optimized counterweight and sealing structure: A counterweight is installed at the bottom of the water lifting cylinder to ensure smooth water intake during the lowering process; a sealing ring is installed between the water level gauge data cable and the through hole to prevent water leakage and ensure the stability of data acquisition.

[0032] 6. Reduced disturbance to the groundwater environment: The static injection method avoids strong disturbance to the surrounding strata and aquifers caused by drilling and pumping, making the test process more environmentally friendly and having less impact on the groundwater environment.

[0033] 7. The testing process is efficient and convenient: by raising water in the pipe to stimulate the water level, and using a water level gauge and data acquisition instrument to automatically collect water level changes, hydrogeological parameters can be calculated. Compared with traditional testing methods, the operation is simpler, the test cycle is shorter, and the efficiency is higher. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a structural diagram of a water-lifting tubular micro-water testing device according to the present invention;

[0036] Figure 2 This is a plan view of the pressure plate on the inner wall of the water container;

[0037] Figure 3 A schematic diagram of a one-way valve inside a water container;

[0038] Figure 4-8 This is a flowchart of the micro-water test method of the present invention, wherein,

[0039] Figure 4 A schematic diagram of the assembly of a statically pressed submerged structure;

[0040] Figure 5 This is a schematic diagram of static pressure penetration into the soil;

[0041] Figure 6 This is a schematic diagram of a water level gauge being lowered into a static pressure pipe.

[0042] Figure 7 A schematic diagram showing the lowering of a water-lifting cylinder inside a static pressure pipe;

[0043] Figure 8 A schematic diagram for raising the water pump. Detailed Implementation

[0044] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0045] To fully understand this invention, detailed steps and structures will be presented in the following description to illustrate the technical solution of this invention. Preferred embodiments of the invention are described in detail below; however, in addition to these detailed descriptions, the invention may have other embodiments.

[0046] Reference Figure 1-3 As shown, the present invention provides a water-lifting tubular micro-water test device, which includes a static pressure tube 1, a rigid permeable structure 2, a water-lifting cylinder 4, a water level gauge 5, and a data acquisition instrument 6.

[0047] The static pressure pipe 1 can be connected in multiple sections to apply static pressure, pressing the rigid permeable structure 2 into the designed location within the target aquifer. The detachable multi-section pipe design allows the static pressure pipe to adapt to formation tests at different depths, ensuring construction flexibility while reducing the difficulty of transporting and handling long pipes. Simultaneously, the static pressure method reduces vibration and disturbance, minimizing the impact on the surrounding soil and groundwater environment, thus exhibiting good environmental friendliness.

[0048] In this embodiment, the bottom of the rigid permeable structure 2 is connected to the conical tip shoe 3. This facilitates the rigid permeable structure 2's penetration through the cover layer of the target aquifer during static pressure testing. Preferably, the rigid permeable structure 2 is a permeable metallic stone, ensuring good guidance and resistance during the insertion of the probe. The permeable metallic stone not only possesses good pressure resistance and corrosion resistance but also ensures uniform permeability, thereby improving the stability of water level activation and recovery during the test.

[0049] The water lifting cylinder 4 is installed inside the static pressure pipe 1 and includes a water container 4-1. The bottom plate of the water container 4-1 has several first water permeable holes 4-2-4. A pressure plate is sealed to the inner wall of the water lifting cylinder 4. The pressure plate has a through hole 4-1-1 at its center and several second water permeable holes 4-1-2 around the through hole 4-1-1. The second water permeable holes 4-1-2 coincide with the first water permeable holes 4-2-4 one by one in the axial direction. Between the pressure plate and the bottom plate of the water lifting cylinder 4, there are multiple holes that are connected to the first water permeable holes 4-2-4. 1. A one-way valve 4-2 corresponding to the second water permeable hole. The one-way valve 4-2, from bottom to top, is equipped with a baffle plate 4-2-1, a return spring 4-2-2, and a spring support 4-2-3. The upper and lower ends of the return spring 4-2-2 are connected to the baffle plate 4-2-1 and the spring support 4-2-3, respectively. The spring support 4-2-3 is a hollow cap that is inverted and placed at the bottom of the through hole 4-1-1. Several support water permeable holes 4-2-5 are provided on the side wall of the hollow cap. The one-way valve 4-2 controls water to flow only into the water container 4-1 from the static pressure pipe 1, preventing backflow when the water container 4-1 is lifted.

[0050] The baffle plate 4-2-1 adopts a disc-shaped metal pressure plate structure, with a diameter designed to be significantly larger than the aperture of the first water-permeable hole 4-2-4. In a static state, the baffle plate 4-2-1, under the combined action of the return spring and the weight of the water, tightly covers the first water-permeable hole 4-2-4, thus forming an effective seal and preventing water from flowing back along its original path. This design not only ensures the unidirectional flow of water during the lifting process of the water-lifting cylinder but also improves the water-stopping effect by increasing the sealing contact area, thereby ensuring the stability and reliability of the experimental data.

[0051] To ensure the water-lifting cylinder can smoothly enter the static pressure pipe and quickly reach the predetermined depth during descent, a counterweight 4-3 is fixedly connected to the bottom of the water container 4-1. This counterweight transmits gravity downwards through its own weight, increasing the stability and guidance of the water-lifting cylinder during descent, preventing it from shaking or getting stuck in the pipe, thus improving the smoothness and safety of the descent operation. Simultaneously, the counterweight 4-3 has a through hole corresponding to the position of the first permeable hole 4-2-4, allowing water to flow unimpeded and ensuring that the normal water intake function of the water container 4-1 is not affected. This structural design achieves a balance between counterweight and permeability, maintaining good water intake while improving the overall operational convenience and reliability of the device.

[0052] A water level gauge 5 is installed at the bottom of the device to monitor the water level changes inside the static pressure tube in real time. The water level gauge 5 is electrically connected to the data acquisition instrument 6 via a data cable. The data cable passes through the through-hole 4-1-1 of the water container 4-1 and extends to the ground, reliably connecting to the data acquisition instrument 6, thus enabling continuous acquisition and storage of water level data. To prevent leakage or seepage caused by the data cable passing through the through-hole, a sealing ring is designed and installed between the data cable and the through-hole. This sealing ring maintains good sealing performance in long-term underwater working environments, ensuring the accuracy of water level measurement and improving the durability and protection of the entire device. This sealing structure design not only effectively prevents external factors from interfering with the water level data during the experiment but also further improves the reliability of the test results and the stability of the system operation.

[0053] like Figure 4-8 As shown, the method of using the above-mentioned water-lifting tubular micro-water testing device to conduct micro-water tests includes the following steps:

[0054] S1. Static Pressure Pipe Assembly: First, the conical pipe shoe is connected to the rigid permeable structure to form the front guide and permeable unit of the device; then, the rigid permeable structure is securely connected to the first section of the static pressure pipe. This assembly method ensures that the front end of the device has good penetration and permeability, enabling it to smoothly break through the overburden layer and enter the target aquifer during the subsequent static pressure injection process, while maintaining the stability and sealing of the overall structure. This pre-assembly ensures the efficiency and accuracy of the subsequent construction process.

[0055] S2. Static Pressure Pipe Insertion: After assembly, static pressure pipes are connected section by section to form a pipe length sufficient for the target depth. Using a static pressure pipe insertion device, uniform pressure is applied to steadily press the rigid permeable structure into the ground until it reaches the designed location of the target aquifer. This static pressure insertion method effectively avoids the strong disturbance and mud contamination generated during traditional drilling, reducing adverse impacts on the surrounding soil and groundwater environment. Simultaneously, this method ensures full contact between the rigid permeable structure at the front end of the device and the aquifer, guaranteeing the authenticity and accuracy of subsequent water level activation and monitoring processes.

[0056] S3. Data Acquisition Device Connection: After the static pressure pipe is pressed into place, slowly lower the water level gauge to the predetermined depth to ensure stable installation inside the water lifting cylinder. The data cable of the water level gauge is led out through the through hole of the water container to the ground and connected to the data acquisition device.

[0057] S4. Lowering the Pumping Tank to the Design Depth: Slowly lower the pumping tank to the designed depth and maintain it at that position for a period of time to allow the water level inside the pipe to reach a natural static state. During this process, the data acquisition instrument continuously monitors the data collected by the water level gauge, reads and records the static water level h0 after stabilization. This step establishes a benchmark water level for the aquifer under natural conditions, providing a reference for subsequent pumping activation and recovery analysis, thereby ensuring the accuracy of hydrogeological parameter calculations.

[0058] S5. Water Level Recovery: After the static water level measurement is completed, some water is lifted out by raising the water pump, causing a momentary drop in the water level in the static pressure pipe. At this time, water from the underground aquifer will gradually replenish the static pressure pipe, allowing the water level to slowly recover to its original level. Throughout the recovery process, the water level gauge monitors the dynamic water level h in real time. i The data is transmitted to the data acquisition instrument. This step can simulate the infiltration and recharge process of the aquifer, and the water level recovery curve clearly reflects the water conductivity and recharge capacity of the aquifer, providing a reliable experimental basis for parameter calculation.

[0059] S6. Calculation of Hydrogeological Parameters: Based on the water level recovery curve over time, calculate the hydrogeological parameters of the target aquifer. Calculate the water level change amplitude ΔH = h. i -h0, plot the experimental curve ΔH~t, and select the appropriate wiring method for calculation according to the requirements. It should be noted that plotting the experimental curve is a common technique used by those skilled in the art, and will not be elaborated here.

[0060] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. A water-lifting tubular micro-water testing device, characterized in that, The water-lifting tubular micro-water test device includes a static pressure tube (1), a rigid permeable structure (2), a water-lifting cylinder (4), a water level gauge (5), and a data acquisition instrument (6). The bottom of the static pressure pipe (1) is connected to a rigid permeable structure (2), which is pressed into the target aquifer by the static pressure pipe device. The water lifting cylinder (4) is installed inside the static pressure pipe (1) and includes a water container (4-1) and a one-way valve (4-2). The water container (4-1) has a through hole (4-1-1) in the center and multiple second water permeable holes (4-1-2) at the bottom. The second water permeable holes are connected to the one-way valve (4-2). The water level gauge (5) is located at the bottom of the water lifting cylinder (4). The data line of the water level gauge (5) passes through the through hole (4-1-1) of the water container (4-1) and is connected to the data acquisition instrument (6). The data acquisition instrument (6) collects and records the water level change data. The one-way valve (4-2) controls that water can only flow into the water container (4-1) from the static pressure pipe (1), and prevents water from flowing back when the water container (4-1) is lifted. The bottom plate of the water container (4-1) is provided with several first water permeable holes (4-2-4). A pressure plate is sealed and connected to the inner wall of the water container (4-1). The pressure plate has a through hole (4-1-1) in the center and several second water permeable holes (4-1-2) are provided around the through hole (4-1-1). The second water permeable holes (4-1-2) coincide with the first water permeable holes (4-2-4) in the axial direction. Between the pressure plate and the bottom plate of the water-lifting cylinder (4), there are multiple one-way valves (4-2) corresponding to the positions of the first and second water-permeable holes. The one-way valves (4-2) are provided with a baffle plate (4-2-1), a return spring (4-2-2), and a spring support (4-2-3) from bottom to top. The upper and lower ends of the return spring (4-2-2) are connected to the baffle plate (4-2-1) and the spring support (4-2-3) respectively. The spring support (4-2-3) is a hollow cap that is upside down at the bottom of the through hole (4-1-1), and several support water-permeable holes (4-2-5) are provided on the side wall of the hollow cap.

2. The water-lifting tubular micro-water testing device according to claim 1, characterized in that, The rigid permeable structure (2) is a permeable metal stone.

3. The water-lifting tubular micro-water testing device according to claim 1, characterized in that, The static pressure pipe (1) is a single section of pipe pile or is composed of multiple sections of pipe piles that can be detached from each other.

4. The water-lifting tubular micro-water testing device according to claim 1, characterized in that, The bottom of the rigid permeable structure (2) is connected to a conical tube boot (3).

5. The water-lifting tubular micro-water testing device according to claim 1, characterized in that, The top of the water-lifting cylinder (4) is connected to a lifting device, and the bottom of the water-lifting cylinder (4) is fixed with a counterweight (4-3). The counterweight (4-3) has a through hole that coincides with the first water-permeable hole (4-2-4).

6. The water-lifting tubular micro-water testing device according to claim 1, characterized in that, The water baffle (4-2-1) is a disc-shaped metal pressure plate with a diameter larger than that of the first water-permeable hole (4-2-4).

7. The water-lifting tubular micro-water testing device according to claim 1, characterized in that, A sealing ring is provided between the data line of the water level gauge (5) and the through hole (4-1-1).

8. A method for testing micro-water using the water-lifting tubular micro-water testing device according to any one of claims 1-7, characterized in that, Includes the following steps: S1. Assembly of static pressure buried structure: Install the rigid permeable structure (2) at the bottom of the static pressure pipe (1); S2, Static pressure insertion: The rigid permeable structure (2) is pressed into the target aquifer using a static pressure pipe press device; S3. Data acquisition device connection: After the pressure pipe is completed, lower the water level gauge (5), and its data line passes through the through hole (4-1-1) of the water container (4-1) and is connected to the data acquisition instrument (6); S4, Pressurized water storage: Lower the water pump (4) and maintain it at a predetermined depth. The data acquisition instrument (6) acquires and records the static water level. S5, Water level recovery: Pull up the water lifting cylinder (4) to make the water level in the static pressure pipe (1) drop instantly and gradually recover. The data acquisition instrument (6) acquires and records the dynamic water level. S6. Calculation of hydrogeological parameters: Based on the recovery curve of water level over time, the hydrogeological parameters of the target aquifer are calculated.

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