Cement-soil permeability coefficient testing device

Abstract

The utility model relates to a geotechnical engineering technical field provides a cement soil permeability coefficient testing arrangement, include: a plurality of containers, a plurality of collecting pipes, a plurality of flowmeters, pressurizing water adding system and controller, be equipped with water-permeable stone in the container, and the cement soil test piece of measurement is placed on water-permeable stone;Each collecting pipe is connected with a container through the connecting pipe, and the collecting pipe is used for collecting seepage water;A plurality of flowmeters are arranged in collecting pipe respectively, and the flowmeter is used for detecting the seepage water amount in collecting pipe;Pressurizing water adding system communicates with a plurality of containers, and pressurizing water adding system is used for pressurizing water adding to the container, controller and pressurizing water adding system and flowmeter electric connection, and the controller is used for controlling pressurizing water adding system opening and closing, and the seepage water amount of flowmeter detection is stored and shows. The above-mentioned cement soil permeability coefficient testing arrangement can automatically obtain the detection result and store and show, improves the accuracy of test and test efficiency, and reduces the manpower cost.

Description

Technical Field

[0001] This utility model relates to the field of geotechnical engineering technology, and in particular to a cement-soil permeability coefficient testing device. Background Technology

[0002] The permeability coefficient of cement-soil is a key parameter characterizing its resistance to fluid seepage. This parameter directly relates to the seepage prevention performance and drainage effect of cement-soil and is often used to evaluate its applicability in seepage prevention projects. In engineering practice, cement-soil is mainly used in sub-projects such as foundation reinforcement, slope protection, and foundation pit cutoff walls. By measuring the permeability coefficient of cement-soil, its seepage prevention capacity can be effectively reflected, which is of great practical significance for ensuring the safety of engineering construction.

[0003] Currently, the determination of the permeability coefficient of cement-soil is mainly based on the industry standard JGJ / T233-2011 "Specification for Cement-Soil Mix Proportion Design", and the test is conducted using the cement-soil permeameter specified in the standard. In this method, the permeation process of the specimen relies on manual reading of the permeation volume, that is, the flow rate is recorded by observing the change in the liquid level in the alkaline burette.

[0004] However, existing methods have the following main problems: For specimens with small seepage or no significant seepage during the test period, continuous observation requires a large amount of manpower. According to the standard requirements, specimens with small seepage need to be read every 30-60 minutes, and the pressure needs to be stabilized for 1 hour during the test. If the specimen still has no seepage when it is close to full scale, the entire test process may last for nearly 30 hours, which is inefficient. In addition, manual reading is subject to subjective error, especially when the seepage is extremely small, it is difficult to accurately capture the actual seepage situation, which affects the accuracy and reliability of the test results. Utility Model Content

[0005] This invention provides a cement-soil permeability coefficient testing device to solve the shortcomings of existing technologies, such as large errors in manual reading, low efficiency, and high labor costs.

[0006] This utility model provides a cement-soil permeability coefficient testing device, comprising: multiple containers, each container containing a permeable stone, on which a cement-soil specimen to be tested is placed; multiple collection pipes, each collection pipe connected to one of the containers via a connecting pipe, the collection pipes being used to collect seepage water; multiple flow meters, respectively disposed on the collection pipes, the flow meters being used to detect the amount of seepage water in the collection pipes; a pressurized water supply system, connected to the multiple containers, the pressurized water supply system being used to pressurize and supply water into the containers; and a controller, electrically connected to the pressurized water supply system and the flow meters, the controller being used to control the opening and closing of the pressurized water supply system, and to store and display the amount of seepage water detected by the flow meters.

[0007] According to the present invention, a cement-soil permeability coefficient testing device further includes a first box, the container is disposed on the first box, and the collection pipe and part of the pressurized water supply system are located inside the first box; a baffle is provided on the top surface of the first box along the circumference of the first box.

[0008] According to the present invention, a cement-soil permeability coefficient testing device is provided, wherein a leakage detector is provided on the baffle plate. The leakage detector is used to detect whether there is leakage on the top surface of the first box and to issue an alarm if there is leakage.

[0009] According to the present invention, a cement-soil permeability coefficient testing device is provided, wherein the pressurized water supply system includes: a water supply component connected to a plurality of containers; and a pressurized component connected to the water supply component.

[0010] According to the present invention, a cement-soil permeability coefficient testing device is provided, wherein the water supply component includes: a second housing containing water; a first pipeline connected to the second housing; a first pump disposed on the first pipeline and electrically connected to the controller; a second pipeline connected to the first pipeline; and a plurality of third pipelines, each of which is connected at both ends to the second pipeline and the container, respectively.

[0011] According to the present invention, a cement-soil permeability coefficient testing device is provided, wherein the water supply component further includes multiple valves, which are respectively disposed in the third pipeline, and the valves are electrically connected to the controller.

[0012] According to the present invention, a cement-soil permeability coefficient testing device is provided, wherein the pressurization component includes: a fourth pipeline for connecting to an external air source, the fourth pipeline being connected to a second pipeline; a second pump disposed in the fourth pipeline, the second pump being electrically connected to the controller; and a pressure controller disposed in the fourth pipeline, the pressure controller being used to control the pressure in the fourth pipeline.

[0013] According to the present invention, a cement-soil permeability coefficient testing device further includes: a temperature control module disposed in the second chamber, the temperature control module being used to control the temperature of the water in the second chamber; and a temperature sensor disposed in the second chamber, the temperature sensor being used to detect the temperature of the water in the second chamber.

[0014] According to the present invention, a cement-soil permeability coefficient testing device further includes a liquid level sensor, which is disposed in the second tank and is used to detect the water level in the second tank.

[0015] According to the cement-soil permeability coefficient testing device provided by this utility model, the bottom of the second box is connected to a drain valve.

[0016] The cement-soil permeability coefficient testing device provided by this utility model can automatically acquire, store, and display test results by setting multiple flow meters and controllers, which improves the accuracy and efficiency of the test. During the test, only manual installation of the cement-soil specimen into the container is required, and no human intervention is needed in the testing process, thus reducing labor costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the cement-soil permeability coefficient testing device provided by this utility model.

[0019] Figure label: 10. Container; 11. Permeable stone; 20. Collection pipe; 21. Connecting pipe; 22. Flow meter; 30. Controller; 31. Display screen; 40. First housing; 41. Baffle; 42. Leakage detector; 50. Second housing; 51. First pipeline; 52. First pump; 53. Second pipeline; 54. Third pipeline; 55. Valve; 56. Fourth pipeline; 57. Second pump; 58. Pressure controller; 59. Drain valve; 60. Temperature control module; 61. Liquid level sensor. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] The following is combined with Figure 1 This invention describes a cement-soil permeability coefficient testing device.

[0022] like Figure 1As shown in the embodiment of this utility model, the cement-soil permeability coefficient testing device includes: multiple containers 10, multiple permeable stones 11, multiple collection pipes 20, multiple connecting pipes 21, multiple flow meters 22, a pressurized water supply system, and a controller 30. Each container 10 contains a permeable stone 11, on which a cement-soil specimen to be tested is placed. The cement-soil specimen is sealed to the inner wall of the container 10 with cement grease. In this embodiment, the permeable stone 11 has a microporous structure, allowing water to permeate into the cement-soil specimen. The first end of each connecting pipe 21 is connected to a container 10, and the second end is connected to a collection pipe 20. Each collection pipe 20 is equipped with a flow meter 22, which is used to detect the amount of water seeping into the collection pipe 20. The pressurized water supply system is connected to the multiple containers 10 and is used to pressurize and add water to the containers 10. The controller 30 is electrically connected to the pressurized water supply system and the flow meter 22. The controller 30 is used to control the opening and closing of the pressurized water supply system and to store and display the amount of water leakage detected by the flow meter 22.

[0023] Specifically, when testing the permeability coefficient of the cement-soil specimen, the controller 30 is operated. The controller 30 controls the pressurization and water supply system to be turned on, pressurizing and adding water to multiple containers 10. The water enters the cement-soil specimen through the permeable stone 11 and permeates into the collection pipe 20. The flow meter 22 detects the amount of water seeping into the collection pipe 20. According to the pressure and time set in the test standard, for cement-soil specimens with large seepage, the flow meter 22 detects the data every 3-5 minutes. For cement-soil specimens with small seepage, the flow meter 22 detects the data every 30-60 minutes and sends the detected seepage amount to the controller 30 for storage and display.

[0024] In this embodiment, the controller 30 has a control module, a storage module, and a display screen 31. The control module is used to control the opening and closing of the pressurized water supply system, the storage module is used to store the amount of seepage, and the display screen 31 is used to display the detected amount of seepage.

[0025] The cement-soil permeability coefficient testing device provided in this embodiment of the invention can automatically acquire, store, and display test results by setting up multiple flow meters and controllers, thereby improving the accuracy and efficiency of the test. During the test, only manual installation of the cement-soil specimen into the container is required, and the test process does not require human intervention, thus reducing labor costs.

[0026] like Figure 1 As shown in the embodiment of this utility model, the cement-soil permeability coefficient testing device further includes a first housing 40. The container 10 is disposed on the first housing 40, and the collection pipe 20 and part of the pressurized water supply system are located inside the first housing 40. A baffle 41 is provided on the top surface of the first housing 40 along the circumference of the first housing 40. The baffle 41 is used to block water when the cement-soil specimen leaks due to poor sealing.

[0027] Furthermore, in this embodiment of the invention, a leak detector 42 is provided on the baffle 41. The leak detector 42 is used to detect whether there is leakage on the top surface of the first housing 40, and to issue an alarm if leakage is detected. In this embodiment, the leak detector 42 is located on the top surface of the first housing 40 so that leakage can be detected and an alarm issued as early as possible. The leak detector 42 can also be electrically connected to the controller 30, sending a signal to the controller 30 at the same time as issuing an alarm, and the controller 30 controls the pressurized water supply system to stop operating. In this embodiment, by setting the leak detector 42, the sealing effect of the cement-soil specimen installed in the container 10 can be tested.

[0028] like Figure 1 As shown in the embodiment of this utility model, the pressurized water supply system includes a water supply component and a pressurization component. The water supply component is connected to a plurality of containers 10, and the pressurization component is connected to the water supply component to pressurize and supply water into the containers 10.

[0029] Further, in an embodiment of this utility model, the water filling assembly includes: a second tank 50, a first pipe 51, a first pump 52, a second pipe 53, and a plurality of third pipes 54. The second tank 50 is disposed outside the first tank 40, and the second tank 50 is filled with water. The first pipe 51 is connected to the second tank 50, the first pump 52 is disposed on the first pipe 51, the first pipe 51 is connected to the second pipe 53, and both ends of each third pipe 54 are connected to the second pipe 53 and the container 10, respectively. In this embodiment, the first pipeline 51, the first pump 52, the second pipeline 53, and the third pipeline 54 are all located inside the first housing 40. The first pump 52 is electrically connected to the controller 30. After the controller 30 controls the first pump 52 to start, the first pump 52 pumps the water in the first water tank 50 through the first pipeline 51, the second pipeline 53, and the third pipeline 54 to each container 10. The water permeates through the permeable stone 11 and the cement soil specimen and then enters the collection pipe 20.

[0030] Furthermore, the water supply assembly also includes multiple valves 55. Each third pipeline 54 is equipped with a valve 55, which is used to control the opening and closing of the third pipeline 54. In this embodiment, the valve 55 is electrically connected to the controller 30, and the controller 30 can control the valve 55 to open or close.

[0031] like Figure 1As shown, in an embodiment of this utility model, the pressurization assembly includes: a fourth pipeline 56, a second pump 57, and a pressure controller 58. The fourth pipeline 56, the second pump 57, and the pressure controller 58 are all housed within the first housing 40. The fourth pipeline 56 is connected to an external compressed gas source and is connected to the second pipeline 53. The second pump 57 is located within the fourth pipeline 56 and is electrically connected to the controller 30, which controls the second pump 57 to open or close. The pressure controller 58 is located within the fourth pipeline 56 and controls the pressure within the fourth pipeline 56.

[0032] Specifically, compressed gas from an external gas source enters the container 10 via the fourth pipe 56, the second pipe 53, and the third pipe 54 under the action of the second pump 57. The pressure controller 58 controls the pressure in the fourth pipe 56 to ensure that the pressure inside the container 10 meets the test requirements. Optionally, in this embodiment, the pressure controller 58 can control the pressure in the fourth pipe 56 by controlling the gas flow rate.

[0033] like Figure 1 As shown in the embodiment of this utility model, the cement-soil permeability coefficient testing device further includes a temperature control module 60 and a temperature sensor. The temperature control module 60 is disposed in the second chamber 50 and is used to control the temperature of the water inside the second chamber 50. The temperature sensor is disposed inside the second chamber 50 and is used to detect the temperature of the water inside the second chamber 50 and send the detected data to the controller 30.

[0034] Specifically, the temperature control module 60 includes a heater and a cooling element, which can cool the water in the second chamber 50 to the set value when the water temperature is higher than the set value, or heat the water to the set value when the water temperature is lower than the set value. A temperature sensor monitors the water temperature in the second chamber 50 in real time. When the water temperature reaches the set value, the controller 30 controls the temperature control module 60 to stop operating. By setting the temperature control module 60, the water temperature in the second chamber 50 can be kept at the set value, reducing the influence of ambient temperature on the water temperature and ensuring the accuracy of the test.

[0035] like Figure 1 As shown in the embodiment of this utility model, the cement-soil permeability coefficient testing device further includes a liquid level sensor 61, which is disposed inside the second chamber 50 and is used to detect the water level inside the second chamber 50.

[0036] like Figure 1 As shown, in an embodiment of this utility model, the second box 50 is provided with a drain valve 59, which is located at the bottom of the second box 50 and is used to drain the water in the second box 50.

[0037] In this embodiment of the invention, the storage module of the controller 30 is used to store the time, pressure, water temperature and level in the second chamber 50, and the amount of water seepage in each collection pipe 20 during the test, and displays them on the display screen 31. The control module of the controller 30 is used to control the first pump 52, valve 55, second pump 57, drain valve 59, pressure controller 58, and temperature control module 60 to open or close.

[0038] It should be noted that in the embodiments of this utility model, the electrical connection can be a wired connection or a wireless connection.

[0039] During testing, after the cement-soil specimen is installed inside container 10, controller 30 activates temperature control module 60 to bring the water temperature inside the second chamber 50 to the set value. Then, controller 30 controls the opening of first pump 52, second pump 57, pressure controller 58, and valve 55. Pressure controller 58 controls the gas flow rate in fourth pipeline 56 to bring the gas pressure to the set value. Second pump 57 and first pump 52 pump gas and water into container 10, respectively. According to the pressure and time set in the testing standard, for cement-soil specimens with high seepage, flow meter 22 checks data every 3-5 minutes; for cement-soil specimens with low seepage, flow meter 22 checks data every 30-60 minutes and sends the detected seepage data to controller 30 for storage.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cement-soil permeability coefficient testing device, characterized in that, include: Multiple containers, each containing permeable stones, are used to place cement-soil specimens to be tested on the permeable stones. Multiple collection tubes, each of which is connected to one of the containers via a connecting tube, are used to collect seepage water; Multiple flow meters are respectively installed in the collection pipe, and the flow meters are used to detect the amount of water seepage in the collection pipe; A pressurized water supply system is connected to multiple containers, and the pressurized water supply system is used to pressurize and supply water into the containers; The controller is electrically connected to the pressurized water supply system and the flow meter. The controller is used to control the opening and closing of the pressurized water supply system and to store and display the amount of water leakage detected by the flow meter.

2. The cement-soil permeability coefficient testing device according to claim 1, characterized in that, It also includes a first housing, the container being disposed on the first housing, and the collection pipe and part of the pressurized water supply system being located inside the first housing; The top surface of the first box is provided with a baffle along the circumference of the first box.

3. The cement-soil permeability coefficient testing device according to claim 2, characterized in that, The baffle is equipped with a leak detector, which is used to detect whether there is any leakage on the top surface of the first box and to issue an alarm if there is leakage.

4. The cement-soil permeability coefficient testing device according to claim 1, characterized in that, The pressurized water supply system includes: A water supply assembly is connected to multiple of the containers; A pressurization component is connected to the water supply component.

5. The cement-soil permeability coefficient testing device according to claim 4, characterized in that, The water supply component includes: The second container, which contains water; The first pipeline is connected to the second housing; A first pump is installed on the first pipeline and is electrically connected to the controller; The second pipeline is connected to the first pipeline; Multiple third pipes, each of which is connected at both ends to the second pipe and the container, respectively.

6. The cement-soil permeability coefficient testing device according to claim 5, characterized in that, The water supply assembly also includes multiple valves, which are respectively installed in the third pipeline and are electrically connected to the controller.

7. The cement-soil permeability coefficient testing device according to claim 5, characterized in that, The pressurization component includes: The fourth pipeline is used to connect to an external gas source, and the fourth pipeline is connected to the second pipeline; A second pump is installed in the fourth pipeline, and the second pump is electrically connected to the controller; A pressure controller is installed in the fourth pipeline, and the pressure controller is used to control the pressure in the fourth pipeline.

8. The cement-soil permeability coefficient testing device according to claim 5, characterized in that, Also includes: A temperature control module is located in the second chamber, and the temperature control module is used to control the temperature of the water in the second chamber. A temperature sensor is installed inside the second tank, and the temperature sensor is used to detect the temperature of the water inside the second tank.

9. The cement-soil permeability coefficient testing device according to claim 5, characterized in that, It also includes a liquid level sensor, which is disposed inside the second tank and is used to detect the water level inside the second tank.

10. The cement-soil permeability coefficient testing device according to claim 5, characterized in that, A drain valve is connected to the bottom of the second housing.

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