A rapid drilling water injection test device for a concrete cutoff wall and a detection method thereof

Abstract

The application discloses a kind of concrete cutoff wall quick drilling water injection test device and its detection method, its testing device includes water pressure plug pressurizing pump, water pressure plug rubber tube, water pressure plug, steel ruler water level gauge, tripod, pulley, steel pipe, water tank, water tank valve, water tank water pipe, flowmeter. Since concrete cutoff wall is extremely slightly water-permeable, the connectivity between each test section in drilling hole is poor, so water pressure plug can be used to separate each test section and carry out water injection test at the same time, thereby improving detection efficiency. At the same time, since the drilling of concrete cutoff wall is completed at one time, the in-situ groundwater level can be obtained according to the inspection hole, without the need for indirect punching around to test the groundwater level, thereby making the water injection test more accurate and saving detection resources in punching around.

Description

Technical Field

[0001] This invention belongs to the field of concrete anti-seepage wall testing technology, and more specifically, relates to a rapid drilling and water injection test device for concrete anti-seepage walls and its testing method. Background Technology

[0002] In hydropower projects, concrete cutoff walls have high impermeability, but their permeability is extremely low. The connectivity between test sections in the borehole is poor, and the borehole walls are stable. Generally, water injection tests are conducted section by section after drilling, leading to a waste of geological drilling equipment resources and excessively long water injection test times, resulting in low testing efficiency. Furthermore, according to the current industry standard "Specification for Water Injection Tests in Hydropower Engineering Boreholes" (NB / T 35104-2017), groundwater levels should be observed before the water injection test. Therefore, it is generally necessary to drill a water level observation borehole near the test borehole, requiring sufficient testing resources to conduct the water injection test.

[0003] Therefore, water pressure plugs can be used to separate the test sections and conduct water injection tests simultaneously, thereby improving testing efficiency. Furthermore, since the drilling of the concrete cutoff wall is completed in one operation, the in-situ groundwater level can be obtained from this inspection hole, eliminating the need to indirectly drill holes around the site to test the groundwater level. This results in higher accuracy of the water injection test and saves testing resources previously required for drilling around the site. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a rapid drilling and water injection test device and its testing method for concrete anti-seepage walls, thereby improving the efficiency and accuracy of water injection testing for concrete anti-seepage walls.

[0005] The present invention adopts the following technical solution.

[0006] The first aspect of the present invention provides a rapid drilling and water injection test device for concrete anti-seepage walls:

[0007] The device includes a water pressure pump 1, a first water pressure pump rubber tube 1.1, a first water pressure pump 1.2, a steel ruler water level gauge 2, a first steel ruler water level gauge probe 2.1, a second steel ruler water level gauge 3, a second steel ruler water level gauge probe A3.1, a third steel ruler water level gauge 4, a steel ruler water level gauge probe 4.1, a tripod 5, a first pulley 6, a second pulley 7, a third pulley 8, a second water pressure pump 9, a second water pressure pump rubber tube 9.1, a second water pressure pump 9.2, a first steel pipe 10, a second steel pipe 11, a water tank 12, a water tank valve 13, a water tank water pipe 14, a groundwater level line 15, a borehole 16, and a flow meter 17.

[0008] Preferably, the first steel pipe 10 and the second steel pipe 11 are each divided into two parts by welding, and the first steel pipe 10 and the second steel pipe 11 are rigidly connected. The first steel pipe 10 is divided into a first steel pipe A10.1 and a steel pipe B10.2, and the first steel pipe A10.1 and the first steel pipe B10.2 are not connected. The second steel pipe 11 is divided into a second steel pipe A11.1 and a second steel pipe B11.2, and the second steel pipe A11.1 and the second steel pipe B11.2 are not connected. The first steel ruler water level probe 2.1 moves freely in the first steel pipe A10.1, and the second steel ruler water level probe A3.1 moves freely in the second steel pipe A11.1.

[0009] Preferably, the water pressure plug pump 1 is used as a device to provide pressure;

[0010] The first water pressure plug rubber tube 1.1 is used to connect to the water pressure plug 9.2 and to seal it;

[0011] The first water pressure plug 1.2 is used to pressurize the device;

[0012] The first steel tape level gauge 2, the second steel tape level gauge 3, and the third steel tape level gauge 4 are instruments used to measure water levels and are connected to different locations respectively.

[0013] The first steel tape level gauge probe 2.1, the second steel tape level gauge probe A3.1, and the third steel tape level gauge probe A4.1 are connected to the steel tape level gauge and are used to detect the water level.

[0014] Tripod 5 is used as a support for the device;

[0015] The first pulley 6, the second pulley 7, and the third pulley 8 are used to guide the steel tape level gauge probe to move in the pipeline;

[0016] The second water pressure plug pump 9 is used to provide additional pressure.

[0017] The second water pressure plug rubber tube 9.1 is used to connect with the second water pressure plug 9.2 for sealing;

[0018] The second water pressure plug 9.2 is used for pressurization and is connected to the first water pressure plug rubber tube 1.1 and the second water pressure plug rubber tube 9.1;

[0019] The first steel pipe 10 and the second steel pipe 11 are used for fluid transmission and are associated with the second section and the third section, respectively.

[0020] Water tank 12 is a container used to store water-filled liquid;

[0021] Water tank valve 13 is used to control the outflow of water from the tank;

[0022] Water tank pipe 14 is used to connect the water tank and the water injection device;

[0023] Groundwater level line 15 is a line used to mark the groundwater level;

[0024] Hole 16 is used for the target area of ​​the water injection test;

[0025] Flow meter 17 is used to record the water flow rate.

[0026] The first aspect of the present invention provides a testing method for a rapid drilling and water injection test device for concrete anti-seepage walls, comprising the following steps:

[0027] Step 1: Before conducting the concrete anti-seepage wall test, groundwater level observation is carried out by drilling holes. After waiting for a set time, groundwater is allowed to enter the borehole for groundwater level observation to obtain basic data.

[0028] Step 2: Based on the obtained data, install the borehole water injection test device, open the water tank valve, move the water tank pipe to the borehole opening, assemble the steel pipe and water pressure plug, and install the steel ruler water level gauge probe.

[0029] Step 3: Based on the installed test equipment, conduct three stages of water injection tests, including constant head water injection test, constant head water injection test and decreasing head water injection test;

[0030] Step 4: Based on the water injection test data, calculate the constant water head and the decrease water head respectively, and test the performance of the concrete anti-seepage wall according to the calculation results.

[0031] Preferably, in step 1, a 24-hour waiting period is allowed to allow the groundwater to reach a relatively stable level at the start of the test.

[0032] Preferably, step 2 specifically includes:

[0033] Step 2.1: Open the water tank valve 13 and move the water tank pipe 14 into the borehole 16 to raise and maintain the water level at the borehole opening.

[0034] Step 2.2: Assemble the steel pipes and water pressure plugs. Assemble the first steel pipe 10 and the second steel pipe 11 with the first water pressure plug 1.2 and the second water pressure plug 9.2, so that the first water pressure plug 1.2 and the second water pressure plug 9.2 are located at the junction of the second and third sections and the junction of the second and first sections, respectively.

[0035] Step 2.3: Install the steel ruler water level probes. Lower the first steel ruler water level probe 2.1 to the bottom of the first steel pipe A10.1, lower the second steel ruler water level probe A3.1 to the bottom of the second steel pipe A11.1, and lower the bottom of the third steel ruler water level probe A4.1 to the opening of borehole 16.

[0036] Preferably, in step 2.2, the test section consists of three sections: the first and second sections are constant head water injection tests, and the third section is a decrease head water injection test. The first section refers to the area above 9.2 on the second water pressure plug, the second section refers to the area from 9.2 on the second water pressure plug to 1.2 on the first water pressure plug, and the third section refers to the area below 1.2 on the first water pressure plug.

[0037] Preferably, step 3 specifically includes:

[0038] Step 3.1: Prepare for the water injection test. Add water to the first, second, and third sections respectively. Add water to the second section through the second steel pipe B11.2 and add water to the third section through the first steel pipe B10.2.

[0039] Step 3.2, the first section is a constant head water injection test. The water injection time each time meets the set duration. When the water is added to the orifice of the first section, the observation ends. The water injection flow rate is recorded by the flow meter 17 and divided by the time interval to get the injection flow rate.

[0040] Step 3.3, the second stage is the constant head water injection test. Each water injection time meets the set duration. Water is added through the second steel pipe B11.2 and the water level gauge 3 alarms when the water is added. The water injection stops and the observation ends. The water injection flow rate is recorded by the flow meter 17 and divided by the time interval to get the injection flow rate.

[0041] Step 3.4, the third section is the water head injection test. The water level observation time meets the set duration. The probe 2.1 of the first steel ruler water level gauge is slowly lowered. When the first steel ruler water level gauge 2 sounds an alarm, the observation ends. The height of the water level after the drop is recorded by the steel ruler water level gauge.

[0042] Preferably, in step 3.1, when adding water, ensure that the first steel ruler water level gauge 2, the second steel ruler water level gauge 3, and the third steel ruler water level gauge 4 sound an alarm, indicating that each section has been filled with water, marking the start of the borehole water injection test.

[0043] Preferably, in step 4, the head calculations for constant head and decrease head are performed.

[0044] When the test section is above the stable groundwater level, the constant head calculation formula is as follows:

[0045]

[0046] When the test section is below the stable groundwater level, the constant head calculation formula is as follows:

[0047]

[0048] Where K represents the permeability coefficient of the concrete cutoff wall, in cm / s;

[0049] Q represents the injection flow rate, in L / min;

[0050] l represents the length of the test section, in cm;

[0051] t1 and t2 represent the test time of the water injection test at a certain moment, in minutes;

[0052] H represents the water head height, in cm;

[0053] H1 and H2 represent the corresponding test head heights at times t1 and t2, in cm.

[0054] r represents the borehole radius of the test section, in cm.

[0055] Preferably, the formula for calculating precipitation head is as follows:

[0056]

[0057] Where K represents the permeability coefficient of the concrete cutoff wall, in cm / s;

[0058] Q represents the injection flow rate, in L / min;

[0059] l represents the length of the test section, in cm;

[0060] t1 and t2 represent the test time of the water injection test at a certain moment, in minutes;

[0061] H represents the water head height, in cm;

[0062] H1 and H2 represent the corresponding test head heights at times t1 and t2, in cm.

[0063] r represents the borehole radius of the test section, in cm.

[0064] Compared with the prior art, the beneficial effects of the present invention are as follows: technicians use geological drilling equipment to drill the inspection holes of the concrete anti-seepage wall in one go, avoiding the waste of geological drilling equipment resources. At the same time, the borehole can be used to conduct in-situ water level observation, avoiding drilling holes around the anti-seepage wall inspection hole, thus making the water level observation accuracy high. The borehole is divided into multiple sections by water pressure plugs to carry out water injection tests at the same time, improving the detection efficiency. Attached Figure Description

[0065] Figure 1 This is a schematic diagram of the device provided according to an embodiment of the present invention;

[0066] Figure 2 This is a top view of the steel pipe portion provided according to an embodiment of the present invention. Detailed Implementation

[0067] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. The embodiments described in this application are merely some embodiments of this invention, and not all embodiments. Based on the spirit of this invention, other embodiments obtained by those skilled in the art without creative effort are all within the protection scope of this invention.

[0068] like Figure 1 As shown, Embodiment 1 of the present invention provides a rapid drilling and water injection test device for concrete anti-seepage walls:

[0069] The device includes a water pressure pump 1, a first water pressure pump rubber tube 1.1, a first water pressure pump 1.2, a steel ruler water level gauge 2, a first steel ruler water level gauge probe 2.1, a second steel ruler water level gauge 3, a second steel ruler water level gauge probe A3.1, a third steel ruler water level gauge 4, a steel ruler water level gauge probe 4.1, a tripod 5, a first pulley 6, a second pulley 7, a third pulley 8, a second water pressure pump 9, a second water pressure pump rubber tube 9.1, a second water pressure pump 9.2, a first steel pipe 10, a second steel pipe 11, a water tank 12, a water tank valve 13, a water tank water pipe 14, a groundwater level line 15, a borehole 16, and a flow meter 17.

[0070] Preferably, the first steel pipe 10 and the second steel pipe 11 are each divided into two parts by welding, and the first steel pipe 10 and the second steel pipe 11 are rigidly connected. The first steel pipe 10 is divided into a first steel pipe A10.1 and a steel pipe B10.2, and the first steel pipe A10.1 and the first steel pipe B10.2 are not connected. The second steel pipe 11 is divided into a second steel pipe A11.1 and a second steel pipe B11.2, and the second steel pipe A11.1 and the second steel pipe B11.2 are not connected. The first steel ruler water level probe 2.1 moves freely in the first steel pipe A10.1, and the second steel ruler water level probe A3.1 moves freely in the second steel pipe A11.1.

[0071] Preferably, the water pressure plug pump 1 is used as a device to provide pressure;

[0072] The first water pressure plug rubber tube 1.1 is used to connect to the water pressure plug 9.2 and to seal it;

[0073] The first water pressure plug 1.2 is used to pressurize the device;

[0074] The first steel tape level gauge 2, the second steel tape level gauge 3, and the third steel tape level gauge 4 are instruments used to measure water levels and are connected to different locations respectively.

[0075] The first steel tape level gauge probe 2.1, the second steel tape level gauge probe A3.1, and the third steel tape level gauge probe A4.1 are connected to the steel tape level gauge and are used to detect the water level.

[0076] Tripod 5 is used as a support for the device;

[0077] The first pulley 6, the second pulley 7, and the third pulley 8 are used to guide the steel tape level gauge probe to move in the pipeline;

[0078] The second water pressure plug pump 9 is used to provide additional pressure.

[0079] The second water pressure plug rubber tube 9.1 is used to connect with the second water pressure plug 9.2 for sealing;

[0080] The second water pressure plug 9.2 is used for pressurization and is connected to the first water pressure plug rubber tube 1.1 and the second water pressure plug rubber tube 9.1;

[0081] The first steel pipe 10 and the second steel pipe 11 are used for fluid transmission and are associated with the second section and the third section, respectively.

[0082] Water tank 12 is a container used to store water-filled liquid;

[0083] Water tank valve 13 is used to control the outflow of water from the tank;

[0084] Water tank pipe 14 is used to connect the water tank and the water injection device;

[0085] Groundwater level line 15 is a line used to mark the groundwater level;

[0086] Hole 16 is used for the target area of ​​the water injection test;

[0087] Flow meter 17 is used to record the water flow rate.

[0088] like Figure 1 and Figure 2 The present invention provides a testing method for a rapid drilling and water injection test device for concrete anti-seepage walls, comprising the following steps:

[0089] Step 1: Before conducting the concrete anti-seepage wall test, groundwater level observation is carried out by drilling holes. After waiting 24 hours, groundwater is allowed to enter the boreholes for groundwater level observation to obtain basic data.

[0090] Preferably, the waiting time is used to allow the groundwater to reach a relatively stable level at the start of the test.

[0091] Step 2: Install the borehole water injection test device, open the water tank valve, move the water tank pipe to the borehole opening, assemble the steel pipe and water pressure plug, and install the steel ruler water level gauge probe;

[0092] In a preferred but non-limiting embodiment of the present invention, step 2 specifically includes:

[0093] Step 2.1: Open the water tank valve 13 and move the water tank pipe 14 into the borehole 16 to raise and maintain the water level at the borehole opening.

[0094] Step 2.2: Assemble the steel pipes and water pressure plugs. Assemble the first steel pipe 10 and the second steel pipe 11 with the first water pressure plug 1.2 and the second water pressure plug 9.2, so that the first water pressure plug 1.2 and the second water pressure plug 9.2 are located at the junction of the second and third sections and the junction of the second and first sections, respectively.

[0095] Step 2.3: Install the steel ruler water level probes. Lower the first steel ruler water level probe 2.1 to the bottom of the first steel pipe A10.1, lower the second steel ruler water level probe A3.1 to the bottom of the second steel pipe A11.1, and lower the bottom of the third steel ruler water level probe A4.1 to the opening of borehole 16.

[0096] Preferably, in step 2.2, the test section consists of three sections: the first and second sections are constant head water injection tests, and the third section is a decrease head water injection test. The first section refers to the area above 9.2 on the second water pressure plug, the second section refers to the area from 9.2 on the second water pressure plug to 1.2 on the first water pressure plug, and the third section refers to the area below 1.2 on the first water pressure plug.

[0097] Step 3 involves conducting three stages of water injection tests, including constant head water injection test, constant head water injection test, and decreasing head water injection test.

[0098] In a preferred but non-limiting embodiment of the present invention, step 3 specifically includes:

[0099] Step 3.1: Prepare for the water injection test. Add water to the first, second, and third sections respectively. Add water to the second section through the second steel pipe B11.2 and add water to the third section through the first steel pipe B10.2.

[0100] Preferably, in step 3.1, when adding water, ensure that the first steel ruler water level gauge 2, the second steel ruler water level gauge 3, and the third steel ruler water level gauge 4 sound an alarm, indicating that each section has been filled with water, marking the start of the borehole water injection test.

[0101] Step 3.2, constant head water injection test. The water injection time for each time meets the requirements of 5.0.4 of the "Specification for Water Injection Test of Drilling in Hydropower Engineering" (NB / T 35104-2017). When the water is added to the first section of the borehole, the observation ends. The water injection flow rate is recorded by the flow meter 17 and divided by the time interval to get the injection flow rate.

[0102] Step 3.3, constant head water injection test. The water injection time should meet the requirements of the procedure. Water is added through the second steel pipe B11.2. When the second steel ruler water level gauge 3 alarms, water injection is stopped and the observation ends. The water injection flow rate is recorded through the flow meter 17. Divide the flow rate by the time interval to get the injection flow rate.

[0103] Step 3.4, Water head injection test. The water level observation time should meet the requirements of the procedure. The first steel ruler water level probe 2.1 is slowly lowered. When the first steel ruler water level 2 alarm sounds, the observation ends. The height of the water level after the drop is recorded by the steel ruler water level.

[0104] Step 4: Calculate the water head. Using the formulas provided in the specifications, calculate the constant water head and the decrease water head respectively, and evaluate the performance of the concrete anti-seepage wall based on the calculation results.

[0105] Preferably, in step 4, the head calculations for constant head and decrease head are performed.

[0106] When the test section is above the stable groundwater level, the constant head calculation formula is as follows:

[0107]

[0108] When the test section is below the stable groundwater level, the constant head calculation formula is as follows:

[0109]

[0110] Where K represents the permeability coefficient of the concrete cutoff wall, in cm / s;

[0111] Q represents the injection flow rate, in L / min;

[0112] l represents the length of the test section, in cm;

[0113] t1 and t2 represent the test time of the water injection test at a certain moment, in minutes;

[0114] H represents the water head height, in cm;

[0115] H1 and H2 represent the corresponding test head heights at times t1 and t2, in cm.

[0116] r represents the borehole radius of the test section, in cm.

[0117] Preferably, the formula for calculating precipitation head is as follows:

[0118]

[0119] Where K represents the permeability coefficient of the concrete cutoff wall, in cm / s;

[0120] Q represents the injection flow rate, in L / min;

[0121] l represents the length of the test section, in cm;

[0122] t1 and t2 represent the test time of the water injection test at a certain moment, in minutes;

[0123] H represents the water head height, in cm;

[0124] H1 and H2 represent the corresponding test head heights at times t1 and t2, in cm.

[0125] r represents the borehole radius of the test section, in cm.

[0126] Compared with the prior art, the beneficial effects of the present invention are as follows: technicians use geological drilling equipment to drill the inspection holes of the concrete anti-seepage wall in one go, avoiding the waste of geological drilling equipment resources. At the same time, the borehole can be used to conduct in-situ water level observation, avoiding drilling holes around the anti-seepage wall inspection hole, thus making the water level observation accuracy high. The borehole is divided into multiple sections by water pressure plugs to carry out water injection tests at the same time, improving the detection efficiency.

[0127] This disclosure can be a system, method, and / or computer program product. A computer program product may include a computer-readable storage medium having computer-readable program instructions loaded thereon for causing a processor to implement various aspects of this disclosure.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A rapid drilling and water injection test device for concrete cut-off walls, used for segmented water injection tests on boreholes (16) of concrete cut-off walls, characterized in that: The device includes a first water pressure plug pressurizing pump (1), a first water pressure plug rubber hose (1.1), a first water pressure plug (1.2), a first steel ruler water level gauge (2), a first steel ruler water level gauge probe (2.1), a second steel ruler water level gauge (3), a second steel ruler water level gauge probe (3.1), a third steel ruler water level gauge (4), a third steel ruler water level gauge probe (4.1), a tripod (5), a first pulley (6), a second pulley (7), a third pulley (8), a second water pressure plug pressurizing pump (9), a second water pressure plug rubber hose (9.1), a second water pressure plug (9.2), a first steel pipe (10), a second steel pipe (11), a water tank (12), a water tank valve (13), a water tank water pipe (14), a groundwater level line (15), a borehole (16), and a flow meter (17). The second water pressure plug (9.2) and the first water pressure plug (1.2) are installed from top to bottom in the borehole (16), dividing the borehole (16) into three test sections. The section above the second water pressure plug (9.2) is the first section, the section between the second water pressure plug (9.2) and the first water pressure plug (1.2) is the second section, and the section below the first water pressure plug (1.2) is the third section. The first water pressure plug pressurizing pump (1) is connected to the first water pressure plug (1.2) via the first water pressure plug rubber tube (1.1), and the second water pressure plug pressurizing pump (9) is connected to the second water pressure plug (9.2) via the second water pressure plug rubber tube (9.1) to pressurize the two water pressure plugs respectively. The first steel pipe (10) is rigidly connected to the second steel pipe (11) and assembled with the first water pressure plug (1.2) and the second water pressure plug (9.2); the first steel pipe (10) extends to the third section through the opening of the drill hole (16) and the second water pressure plug (9.2) and the first water pressure plug (1.2); the second steel pipe (11) extends to the second section through the opening of the drill hole (16) and the second water pressure plug (9.2). The first steel pipe (10) is divided into a first steel pipe A (10.1) and a first steel pipe B (10.2) that are not interconnected inside the pipe by welding. The second steel pipe (11) is divided into a second steel pipe A (11.1) and a second steel pipe B (11.2) that are not interconnected inside the pipe by welding. The lower ends of the first steel pipe A (10.1) and the first steel pipe B (10.2) lead to the third section, and the lower ends of the second steel pipe A (11.1) and the second steel pipe B (11.2) lead to the second section. The first steel ruler water level probe (2.1), the second steel ruler water level probe (3.1) and the third steel ruler water level probe (4.1) are respectively connected to the first steel ruler water level (2), the second steel ruler water level (3) and the third steel ruler water level (4); the first steel ruler water level probe (2.1) can move up and down in the first steel pipe A (10.1), the second steel ruler water level probe (3.1) can move up and down in the second steel pipe A (11.1), and the third steel ruler water level probe (4.1) is used to be lowered to the borehole (16) opening to detect the water level of the first section; The tripod (5) is set above the opening of the borehole (16), and the first pulley (6), the second pulley (7) and the third pulley (8) are set on the tripod (5) to guide the corresponding probes connected to the three steel ruler water level gauges to rise and fall respectively; The water tank (12) is connected to the water tank pipe (14) through the water tank valve (13). The water outlet of the water tank pipe (14) can be moved to the borehole (16), the upper end of the second steel pipe B (11.2) and the upper end of the first steel pipe B (10.2) to add water to the first section, the second section and the third section respectively. The flow meter (17) is used to record the water flow rate. The groundwater level in the borehole (16) is marked by the groundwater level line (15).

2. The rapid drilling and water injection test device for concrete anti-seepage walls according to claim 1, characterized in that: The first water pressure plug rubber tube (1.1) is connected to and sealed with the second water pressure plug (9.2), and the second water pressure plug rubber tube (9.1) is connected to and sealed with the second water pressure plug (9.2).

3. A testing method using the rapid drilling and water injection test device for concrete anti-seepage walls as described in any one of claims 1-2, characterized in that, Includes the following steps: Step 1: Before conducting the concrete anti-seepage wall test, groundwater level observation is carried out by drilling holes. After waiting for a set time, groundwater is allowed to enter the borehole for groundwater level observation to obtain basic data. Step 2: Based on the obtained data, install the borehole water injection test device, open the water tank valve, move the water tank pipe to the borehole opening, assemble the steel pipe and water pressure plug, and install the steel ruler water level gauge probe. Step 3: Based on the installed test equipment, conduct water injection tests in three test sections, including two test sections of constant head water injection tests and one test section of decreasing head water injection tests. Step 4: Based on the water injection test data, calculate the constant water head and the decrease water head respectively, and test the performance of the concrete anti-seepage wall according to the calculation results.

4. A testing method using the rapid drilling and water injection test device for concrete anti-seepage walls as described in claim 3, characterized in that: In step 1, wait 24 hours to allow the groundwater to reach a relatively stable level at the start of the experiment.

5. A testing method using the rapid drilling and water injection test device for concrete anti-seepage walls as described in claim 3, characterized in that: Step 2 specifically includes: Step 2.1: Open the water tank valve (13) and move the water tank pipe (14) into the borehole (16) to raise and maintain the water level at the borehole opening; Step 2.2, assemble the steel pipe and water pressure plug. Assemble the first steel pipe (10) and the second steel pipe (11) with the first water pressure plug (1.2) and the second water pressure plug (9.2) so that the first water pressure plug (1.2) and the second water pressure plug (9.2) are located at the junction of the second and third sections and the junction of the second and first sections, respectively. Step 2.3, install the steel ruler water level probe, lower the first steel ruler water level probe (2.1) to the bottom of the first steel pipe A (10.1), lower the second steel ruler water level probe (3.1) to the bottom of the second steel pipe A (11.1), and lower the bottom of the third steel ruler water level probe (4.1) to the opening of the borehole (16).

6. A testing method using the rapid drilling and water injection test device for concrete anti-seepage walls as described in claim 5, characterized in that: In step 2.2, the test section consists of three sections. The first and second sections are constant head water injection tests, and the third section is a decrease head water injection test. The first section refers to the area above the second water pressure plug (9.2), the second section refers to the area from the second water pressure plug (9.2) to the first water pressure plug (1.2), and the third section refers to the area below the first water pressure plug (1.2).

7. A testing method using the rapid drilling and water injection test device for concrete anti-seepage walls as described in claim 3, characterized in that: Step 3 specifically includes: Step 3.1: Prepare for the water injection test. Add water to the first, second, and third sections respectively. Add water to the second section through the second steel pipe B (11.2) and add water to the third section through the first steel pipe B (10.2). Step 3.2, the first section is a constant head water injection test. The water injection time meets the set duration each time. When the water is added to the orifice of the first section, the observation ends. The water injection flow rate is recorded by the flow meter (17) and divided by the time interval to get the injection flow rate. Step 3.3, the second section is a constant head water injection test. Each water injection time meets the set duration. Water is added through the second steel pipe B (11.2) and the water level gauge (3) of the second steel ruler sounds an alarm. Water injection is stopped and the observation ends. The water injection flow rate is recorded by the flow meter (17). Dividing the flow rate by the time interval gives the injection flow rate. Step 3.4, the third section is the water head injection test. The water level observation time meets the set duration. The probe (2.1) of the first steel ruler water level gauge is slowly lowered. When the first steel ruler water level gauge (2) sounds an alarm, the observation ends. The height of the water level after the drop is recorded by the steel ruler water level gauge.

8. A testing method using the rapid drilling and water injection test device for concrete anti-seepage walls as described in claim 7, characterized in that: In step 3.1, when adding water, ensure that the first steel ruler water level gauge (2), the second steel ruler water level gauge (3), and the third steel ruler water level gauge (4) sound an alarm, indicating that each section has been filled with water, marking the start of the borehole water injection test.

9. A testing method using the rapid drilling and water injection test device for concrete anti-seepage walls as described in claim 3, characterized in that: In step 4, the head calculations for constant head and decrease head are performed. When the test section is above the stable groundwater level, the constant head calculation formula is as follows: When the test section is below the stable groundwater level, the constant head calculation formula is as follows: Where K represents the permeability coefficient of the concrete cutoff wall, in cm / s; Q represents the injection flow rate, in L / min; l represents the length of the test section, in cm; , This indicates the test time of the water injection test at a certain moment, in minutes. H represents the water head height, in cm; , Indicates in , The corresponding test head height at any given time, in cm; r represents the borehole radius of the test section, in cm.

10. A testing method using the rapid drilling and water injection test device for concrete anti-seepage walls as described in claim 3, characterized in that: The formula for calculating precipitation head is as follows: Where K represents the permeability coefficient of the concrete cutoff wall, in cm / s; Q represents the injection flow rate, in L / min; l represents the length of the test section, in cm; , This indicates the test time of the water injection test at a certain moment, in minutes. H represents the water head height, in cm; , Indicates in , The corresponding test head height at any given time, in cm; r represents the borehole radius of the test section, in cm.

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