A triaxial test sample preparation device for biologically inducing calcium carbonate precipitation to solidify sand

Abstract

The application relates to the technical field of sand solidification test, and discloses a triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation solidification of sand, which comprises a base, a supporting plate arranged at the top of the base, an L-shaped frame rotatably arranged on the side wall of the supporting plate, a fixing assembly slidably arranged on the L-shaped frame, a triaxial test assembly connected through the fixing assembly and the L-shaped frame, a power assembly arranged at the top of the base and used for driving the L-shaped frame to rotate, and a pressure increasing assembly arranged at the top of the base and in communication with the top and the bottom of the triaxial test assembly, wherein the pressure increasing assembly and the power assembly constitute a transmission cooperation. The purpose is to improve the penetration speed of the solution, so as to avoid the reaction of the two solutions on the sample surface, the problem that calcium carbonate precipitation cannot be formed in the sample and error data are generated.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of sand solidification tests, in particular to a triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation solidification of sand. BACKGROUND

[0002] Induced calcium carbonate precipitation is a simple and effective process, the principle of which is to generate calcium carbonate precipitation through the reaction of calcium ions and carbonate ions, and the precipitate adheres to the surface of the cementitious matrix material, which not only makes the surface rougher, but also fills small gaps, thereby improving the strength, and microbial induced calcium carbonate reinforcement is essentially a calcium carbonate precipitation technology based on biomineralization, and has certain limitations due to the use of living microorganisms.

[0003] In the sample preparation process of bionic chemical induced calcium carbonate precipitation solidification of sand, two solutions containing carbonate ions and calcium ions respectively are usually used to spray and penetrate the sand sample, and since the two solutions will react after being mixed, in order to ensure the test effect, the penetration speed of the solutions needs to be ensured to avoid the reaction of the two solutions on the surface of the sample, so that calcium carbonate precipitation cannot be formed in the interior of the sample and false data is generated. Therefore, a triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation solidification of sand is provided. SUMMARY

[0004] The purpose of the application is to improve the penetration speed of the solutions to avoid the reaction of the two solutions on the surface of the sample, so that calcium carbonate precipitation cannot be formed in the interior of the sample and false data is generated. Therefore, a triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation solidification of sand is provided.

[0005] The technical solution of the application to solve the above technical problems is as follows:

[0006] A triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation solidification of sand, comprising:

[0007] A base is provided with a support plate on the top, and an L-shaped frame is rotatably arranged on the side wall of the support plate;

[0008] A fixing assembly is slidably arranged on the L-shaped frame;

[0009] A triaxial test assembly is connected through the fixing assembly and the L-shaped frame;

[0010] A power assembly is arranged on the top of the base and used for driving the L-shaped frame to rotate;

[0011] A booster assembly is arranged on the top of the base and communicates with the top and bottom of the triaxial test assembly, and the booster assembly and the power assembly constitute a transmission cooperation.

[0012] Based on the technical scheme, the application can be further improved as follows.

[0013] Further, the fixing assembly comprises:

[0014] The sliding plate and the L-shaped frame are slidingly connected, and a circular hole is formed in the top of the L-shaped frame and the top of the sliding plate.

[0015] The first screw rod is rotationally arranged on the L-shaped frame, a threaded hole is formed in the top of the sliding plate, and the threaded hole is matched with the first screw rod.

[0016] Further, the three-axis test assembly comprises:

[0017] The first support is provided with a plurality of fastening assemblies on the side wall.

[0018] The second support is connected with the plurality of fastening assemblies, and a limiting rod is arranged on the first support and the second support, and the limiting rod is matched with the circular hole.

[0019] The sample tube is arranged between the first support and the second support.

[0020] The two feeding tubes are respectively arranged on the first support and the second support.

[0021] The two electromagnetic valves are respectively arranged on the first support and the second support.

[0022] Further, the fastening assembly comprises:

[0023] The fixing block is fixed on the side wall of the first support, a rotating seat is rotationally arranged on the fixing block, and a second screw rod is fixed on the top of the rotating seat.

[0024] The fixing seat is fixed on the side wall of the second support, a notch is formed in the side wall of the fixing seat, and the second screw rod passes through the notch.

[0025] The connecting block is connected with the second screw rod through a thread.

[0026] Further, the power assembly comprises:

[0027] The motor is fixed on the top of the base.

[0028] The two transmission wheels are rotationally arranged on the side wall of the support plate, one of the transmission wheels is fixed with the output shaft of the motor, and the side walls of the two transmission wheels are sleeved with the same transmission belt.

[0029] A rotating shaft is arranged on the side wall of the support plate, and the rotating shaft and the other transmission wheel are fixed, and the end of the rotating shaft is fixed with the L-shaped frame.

[0030] Further, the booster assembly comprises:

[0031] A tank is fixed on the top of the base, a first pipe is arranged through the top of the side wall of the tank, and the first pipe is communicated with one of the electromagnetic valves, and a second pipe is arranged through the bottom of the side wall of the tank, and the second pipe is communicated with the other electromagnetic valve.

[0032] Further, the booster assembly comprises:

[0033] A piston is slidingly arranged on the inner wall of the tank;

[0034] A transmission rod is fixed on the top of the piston, and the transmission rod penetrates through the top of the tank, and a circular groove is formed on the top of the transmission rod;

[0035] A connecting rod is slidingly arranged in the circular groove, a spring is arranged at the bottom end of the connecting rod, and the spring is fixed with the inner wall of the circular groove, and a connecting seat is fixed at the top end of the connecting rod.

[0036] Further, the booster assembly comprises:

[0037] A fixed plate is fixed on the top of the tank, a rotating disc is rotatably arranged on the side wall of the fixed plate, and the rotating disc is fixed with the rotating shaft;

[0038] A connecting rod is rotatably arranged at the eccentric position of the side wall of the rotating disc, and the connecting rod is rotatably connected with the connecting seat.

[0039] Compared with the prior art, the technical scheme of the present application has the following beneficial technical effects:

[0040] The triaxial test assembly is stably fixed on the L-shaped frame through the fixing assembly, the design not only guarantees the stability of the test assembly, but also enables flexible adjustment through the rotation of the L-shaped frame, the power assembly provides a reliable power source for the rotation of the L-shaped frame, so that the triaxial test assembly can realize a 180-degree overturning, which is crucial for solution penetration, because it can ensure that the solution penetrates from all directions of the sand sample, thereby improving the uniformity and depth of solution penetration, secondly, the booster assembly communicates with the top and bottom of the triaxial test assembly, the booster assembly can provide a stable pressure environment for the test sample as needed, when the power assembly drives the L-shaped frame to rotate, it also drives the booster assembly to work, so that the air pressure at the upper end of the triaxial test assembly rises, this air pressure change helps to promote the solution to penetrate deeper into the sand, and react with the calcium ions and carbonate ions inside to form calcium carbonate precipitation, the device realizes the reciprocating rotation of the triaxial test assembly through the reciprocating work of the power assembly, which means that the two ends of the triaxial test assembly will be alternately at the top during the test, thereby allowing two solutions containing carbonate ions and calcium ions respectively to alternately penetrate into the sand sample, this alternating penetration mode effectively avoids the problem of mixed reaction of the two solutions on the sample surface, and ensures that calcium carbonate precipitation can be uniformly formed inside the sand, in summary, the triaxial test sample preparation device for biomimetic chemical induced calcium carbonate precipitation solidification of sand soil realizes effective control of the solution penetration speed, mixed reaction and test efficiency through the ingenious cooperation of the power assembly, the L-shaped frame, the triaxial test assembly and the booster assembly, this design not only improves the accuracy and reliability of the test, but also provides strong technical support for the research on biomimetic chemical induced calcium carbonate precipitation solidification of sand soil. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a perspective structural schematic diagram of the present application;

[0042] Figure 2 is a structural schematic diagram of the fixing block, rotating seat and second screw rod of the present application;

[0043] Figure 3 is a structural schematic diagram of the tank body of the present application;

[0044] Figure 4 is a structural schematic diagram of the transmission rod of the present application.

[0045] In the figure: 1, base; 2, support plate; 3, L-shaped frame; 4, fixing assembly; 41, sliding plate; 42, first lead screw; 5, triaxial test assembly; 51, first support; 52, fastening assembly; 521, fixed block; 522, rotating seat; 523, second lead screw; 524, fixed seat; 525, connecting block; 53, second support; 54, limiting rod; 55, sample tube; 56, feeding tube; 57, electromagnetic valve; 6, power assembly; 61, motor; 62, transmission wheel; 63, transmission belt; 64, rotating shaft; 7, pressure boosting assembly; 71, tank body; 72, first pipe body; 73, second pipe body; 8, piston; 9, transmission rod; 10, connecting rod; 11, spring; 12, connecting seat; 13, fixed plate; 14, rotating disc; 15, connecting rod. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0047] In combination Figures 1-4 As shown in the figure, the triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation solidification of sand soil according to the present application comprises:

[0048] The base 1 is provided with a support plate 2 on the top thereof, and the side wall of the support plate 2 is rotatably provided with an L-shaped frame 3;

[0049] The fixing assembly 4 is slidably arranged on the L-shaped frame 3;

[0050] The triaxial test assembly 5 is connected through the fixing assembly 4 and the L-shaped frame 3;

[0051] The power assembly 6 is arranged on the top of the base 1, and the power assembly 6 is used to drive the L-shaped frame 3 to rotate;

[0052] The pressure boosting assembly 7 is arranged on the top of the base 1, the pressure boosting assembly 7 is in communication with the top and bottom of the triaxial test assembly 5, and the pressure boosting assembly 7 and the power assembly 6 constitute a transmission cooperation.

[0053] The core components of the device include a base 1, a support plate 2 fixed on the top of the base 1, an L-shaped frame 3 rotatably arranged on the side wall of the support plate 2, a fixing assembly 4 slidably arranged on the L-shaped frame 3, the fixing assembly 4 being used for connecting and fixing a triaxial test assembly 5, the triaxial test assembly 5 being stably connected through the fixing assembly 4 and the L-shaped frame 3, so as to ensure that the triaxial test assembly 5 will not shake or fall off during the test, a power assembly 6 being further arranged on the top of the base 1, the main function of the power assembly 6 being to drive the L-shaped frame 3 to rotate, when the motor 61 is started, the driving shaft 64 is driven to rotate through the transmission of the transmission belt 63 and the two transmission wheels 62, and then the L-shaped frame 3 is driven to rotate around the axis of the support plate 2, so as to realize the overturning of the triaxial test assembly 5, in addition, a pressurizing assembly 7 is further arranged on the top of the base 1, the pressurizing assembly 7 being in communication with the top and bottom of the triaxial test assembly 5, during the rotation of the L-shaped frame 3 driven by the power assembly 6, the pressurizing assembly 7 and the power assembly 6 form a transmission cooperation, specifically, when the L-shaped frame 3 rotates, the piston 8 in the pressurizing assembly 7 can be driven to move, so as to change the air pressure inside the tank body 71, and the air pressure change is transmitted to the inside of the triaxial test assembly 5 through the first pipe body 72 and the second pipe body 73, so as to realize the regulation of the solution permeation speed in the sample tube 55, in summary, the triaxial test sample preparation device for the bionic chemical induction calcium carbonate precipitation solidification of sand soil of the application drives the L-shaped frame 3 to rotate through the power assembly 6, and cooperates with the pressurizing assembly 7 to realize the air pressure change, so as to accelerate the solution permeation and mixing reaction, and improve the accuracy and efficiency of the test.

[0054] The application can be further configured as shown in a preferred embodiment Figures 1 to 4 The fixing assembly 4 comprises

[0055] The sliding plate 41 is slidably connected with the L-shaped frame 3, and the top of the L-shaped frame 3 and the top of the sliding plate 41 are both provided with a circular hole.

[0056] The first screw rod 42 is rotatably arranged on the L-shaped frame 3, and the top of the sliding plate 41 is provided with a threaded hole which is matched with the first screw rod 42.

[0057] The work of the first screw rod 42 makes the sliding plate 41 descend, and through the cooperation of the round holes on the sliding plate 41 and the L-shaped frame 3 and the limiting rods 54, the fixation of the triaxial test assembly 5 and the L-shaped frame 3 can be realized. The fixation assembly 4 is mainly composed of the sliding plate 41 and the first screw rod 42. The sliding plate 41 is in sliding connection with the L-shaped frame 3, and this sliding connection allows the sliding plate 41 to move in a certain direction on the L-shaped frame 3. Round holes are arranged on the top of the L-shaped frame 3 and the top of the sliding plate 41, which are used for subsequent cooperation with the limiting rods 54. The first screw rod 42 is rotationally arranged on the L-shaped frame 3, and its position is usually perpendicular to the moving direction of the sliding plate 41. A threaded hole adapted to the first screw rod 42 is arranged on the top of the sliding plate 41, which means that when the first screw rod 42 rotates, the sliding plate 41 will move along the axis direction of the first screw rod 42 due to the interaction of the threads, that is, the lifting is realized. When it is necessary to fix the triaxial test assembly 5, first, the rotating direction of the first screw rod 42 is adjusted, so that the sliding plate 41 descends along the L-shaped frame 3. With the descent of the sliding plate 41, the round hole on the top of the sliding plate 41 will gradually approach the round hole on the top of the L-shaped frame 3. At this time, the limiting rod 54 is inserted into the round holes of the sliding plate 41 and the L-shaped frame 3. Since the diameter of the limiting rod 54 is usually slightly larger than the diameter of the round hole, it needs to be completely inserted by appropriate force to ensure that the triaxial test assembly 5 is firmly fixed on the L-shaped frame 3. Once the limiting rod 54 is completely inserted and passes through the two round holes, it connects the sliding plate 41, the L-shaped frame 3 and the triaxial test assembly 5 together to form a stable overall structure. In this way, the triaxial test assembly 5 can maintain a stable position and posture during the subsequent test process, ensuring the accuracy and reliability of the test.

[0058] In a preferred embodiment, the application can be further configured as shown in Figures 1 to 4 The triaxial test assembly 5 comprises:

[0059] The first support 51 is provided with a plurality of fastening assemblies 52 on the side wall;

[0060] The second support 53 is connected with the plurality of fastening assemblies 52. The limiting rods 54 are arranged on the first support 51 and the second support 53, and are adapted to the round holes;

[0061] The sample tube 55 is arranged between the first support 51 and the second support 53;

[0062] The two feeding tubes 56 are respectively arranged through the first support 51 and the second support 53;

[0063] Two solenoid valves 57 are respectively installed on the first support 51 and the second support 53. The first support 51 serves as the main support structure, and its side wall is provided with multiple fastening components 52. These fastening components 52 are used to firmly connect the second support 53 to the first support 51, forming a stable support frame. Within this support frame, the sample tube 55 is placed between the first support 51 and the second support 53 to accommodate and support the test sample. To ensure the stability and positional accuracy of the sample tube 55 during the test, both the first support 51 and the second support 53 are provided with limiting rods 54. These limiting rods 54 are adapted to the round holes on the aforementioned sliding plate 41 and L-shaped frame 3. When they are inserted into these holes... When the round holes are installed, the triaxial test assembly 5 can be effectively fixed on the L-shaped frame 3. This fixing method not only ensures the stability of the test assembly, but also facilitates disassembly and reinstallation when needed. In addition, two feeding tubes 56 are respectively installed through the first support 51 and the second support 53. They allow the test personnel to add test materials into the sample tube 55. The design of these feeding tubes 56 makes the material addition process more convenient and efficient. Finally, two solenoid valves 57 are respectively installed through the first support 51 and the second support 53. They are used to control the opening and closing of the feeding tubes 56. By opening or closing the solenoid valves 57, the test personnel can accurately control the amount and time of addition of test materials, thereby ensuring the accuracy and reliability of the test.

[0064] In a preferred embodiment, the present invention may be further configured as follows: Figures 1 to 4 As shown; the fastening assembly 52 includes:

[0065] A fixing block 521 is fixed on the side wall of the first support 51. A rotating seat 522 is rotatably mounted on the fixing block 521. A second lead screw 523 is fixed to the top of the rotating seat 522.

[0066] The fixing seat 524 is fixed to the side wall of the second support 53. The side wall of the fixing seat 524 has a notch, and the second lead screw 523 passes through the notch.

[0067] Connecting block 525 is connected by threads and second lead screw 523.

[0068] The first support 51 is placed on the sample tube 55. Through the action of the rotating seat 522, the second lead screw 523 is rotated into the notch of the fixed seat 524. The rotating connecting block 525, in conjunction with the fixed seat 524, secures the second support 53, sample tube 55, and first support 51. The fixed block 521 is firmly fixed to the side wall of the first support 51. The rotating seat 522 is positioned on the fixed block 521, allowing it to rotate. The second lead screw 523 is fixed to the top of the rotating seat 522; this is a crucial connection and adjustment component. Next, the fixed seat 524 is fixed to the side wall of the second support 53. A notch is provided on the side wall of the fixed seat 524; this notch is designed to allow the second lead screw 523 to pass through and engage with it. When the support 51 is placed on the sample tube 55, the fastening assembly 52 can be used for fixing. By rotating the rotating seat 522, the second lead screw 523 can be rotated and passed through the notch of the fixing seat 524. At this time, the connecting block 525 can be connected to the second lead screw 523 by threads. In order to achieve a firm fixation between the second support 53, the sample tube 55 and the first support 51, the connecting block 525 needs to be rotated. Since the connecting block 525 is connected to the second lead screw 523 by threads, when the connecting block 525 rotates, it will move along the axis of the second lead screw 523. This movement will cause the connecting block 525 to gradually approach and press against the fixing seat 524, thereby achieving a firm fixation between the three.

[0069] In a preferred embodiment, the present invention may be further configured as follows: Figures 1 to 4 As shown; Power assembly 6 includes:

[0070] Motor 61, motor 61 is fixed to the top of base 1;

[0071] Two drive wheels 62 are rotatably mounted on the side wall of the support plate 2. One of the drive wheels 62 is fixed to the output shaft of the motor 61. The same drive belt 63 is sleeved on the side wall of the two drive wheels 62.

[0072] A rotating shaft 64 is rotatably mounted on the side wall of the support plate 2, and the rotating shaft 64 is fixed to another transmission wheel 62. The end of the rotating shaft 64 is fixed to the L-shaped frame 3.

[0073] When the switch for motor 61 is turned on, motor 61 drives shaft 64 to rotate 180 degrees via transmission belt 63 and two transmission wheels 62. The rotation of shaft 64 causes L-shaped frame 3 to rotate. Motor 61 is securely fixed to the top of base 1. The output shaft of motor 61 is fixedly connected to one transmission wheel 62, meaning that when motor 61 is working, it drives this transmission wheel 62 to rotate. Both transmission wheels 62 are rotatably mounted on the side wall of support plate 2. Besides the transmission wheel 62 fixed to the output shaft of motor 61, the other transmission wheel 62 is fixedly connected to shaft 64. Thus, when the first transmission wheel 62 rotates, it transmits power to the second transmission wheel 62 via transmission belt 63. Since the second transmission wheel 62 is fixedly connected to the rotating shaft 64, when the second transmission wheel 62 rotates, it will drive the rotating shaft 64 to rotate. The end of the rotating shaft 64 is fixedly connected to the L-shaped frame 3. This means that when the rotating shaft 64 rotates, it will drive the L-shaped frame 3 to rotate. When it is necessary to adjust the position or angle of the L-shaped frame 3, simply turn on the switch of the motor 61, and the motor 61 will start working. Through the transmission action of the transmission belt 63 and the two transmission wheels 62, the power of the motor 61 will be transmitted to the rotating shaft 64, thereby driving the L-shaped frame 3 to rotate. Since the rotation angle and speed of the motor 61 can be precisely adjusted by the controller, it can be ensured that the L-shaped frame 3 rotates to the required position or angle.

[0074] In a preferred embodiment, the present invention may be further configured as follows: Figures 1 to 4 As shown; the booster assembly 7 includes:

[0075] Tank 71 is fixed to the top of base 1. A first pipe 72 is installed through the top of the side wall of tank 71 and is connected to one of the solenoid valves 57. A second pipe 73 is installed through the bottom of the side wall of tank 71 and is connected to another solenoid valve 57. It should also be noted that a rotary encoder is also provided. The rotary encoder is connected to motor 61 and controller to control the rotation angle of motor 61. Motor 61 rotates 180 degrees clockwise and then immediately rotates 180 degrees counterclockwise to avoid twisting of the first pipe 72 and the second pipe 73, which would affect the normal gas supply. Both the first pipe 72 and the second pipe 73 are flexible hoses.

[0076] In a preferred embodiment, the present invention may be further configured as follows: Figures 1 to 4 As shown; also includes:

[0077] Piston 8 is slidably mounted on the inner wall of tank 71;

[0078] The transmission rod 9 is fixed to the top of the piston 8 and passes through the top of the tank 71. A circular groove is provided on the top of the transmission rod 9.

[0079] The connecting rod 10 is slidably disposed in the circular groove. A spring 11 is provided at the bottom end of the connecting rod 10 and the spring 11 is fixed to the inner wall of the circular groove. A connecting seat 12 is fixed at the top end of the connecting rod 10.

[0080] During the movement of piston 8, a pressure difference exists between the upper and lower parts of the cylinder 71. When the first support 51 is at the top, the solenoid valve 57 on the first support 51 is turned on. At this time, under the action of the compressed spring 11, piston 8 is pushed downward. Through the second tube 73 and the corresponding solenoid valve 57, the air pressure inside the first support 51 rises. Under the action of air pressure, the solution inside the first support 51 quickly permeates into the sand sample. Conversely, when the second support 53 rotates to the top, the solenoid valve 57 on the first support 51 is closed, and the solenoid valve 57 on the second support 53 is opened. At this time, piston 8, under the action of transmission rod 9, connecting rod 10, connecting seat 12, connecting rod 15 and turntable 14, rises with the spring 11, thereby increasing the air pressure inside the second support 53, and allowing the solution inside the second support 53 to quickly permeate into the sand sample.

[0081] In a preferred embodiment, the present invention may be further configured as follows: Figures 1 to 4 As shown; also includes:

[0082] A fixing plate 13 is fixed to the top of the tank body 71. A turntable 14 is rotatably provided on the side wall of the fixing plate 13, and the turntable 14 and the rotating shaft 64 are fixed.

[0083] Link 15 is rotatably mounted at an eccentric position on the side wall of turntable 14, and is rotatably connected to connecting seat 12.

[0084] During the rotation of the rotating shaft 64, the turntable 14 is driven to rotate. When the turntable 14 rotates, the connecting seat 12 is driven to move downward through the connecting rod 15, so that the connecting rod 10 compresses the spring 11. When the corresponding solenoid valve 57 is turned on, the piston 8 is pushed to move under the action of the spring 11. This, together with the first tube 72 and the second tube 73, realizes the change of air pressure inside the first support 51 and the second support 53, thereby assisting the solution to permeate into the sample.

[0085] The specific working principle of the biomimetic chemically induced calcium carbonate precipitation and solidification triaxial test sample preparation device of the present invention is as follows:

[0086] In use, firstly, the first support 51 is connected to the L-shaped frame 3 through the limiting rod 54 and the round hole. Then, the sample tube 55 is placed on the first support 51, and the sand sample is placed inside the sample tube 55. The permeable stone is placed at the bottom of the sample tube 55 to compact the sample. Another permeable stone is placed on top of the sample, so that the sample can be confined inside the sample tube 55 by the two permeable stones. Then, the second support 53 is placed on the sample tube 55. Through the action of the rotating seat 522, the second screw 523 is rotated into the notch of the fixed seat 524. The connecting block 525 is rotated to fix the second support 53, the sample tube 55 and the first support 51 in conjunction with the fixed seat 524.

[0087] Open the feeding tube 56 on the second support 53 and inject one of the solutions into the sample tube 55 through the feeding tube 56. Close the feeding tube 56 and then turn on the motor 61. When the motor 61 is working, it drives the rotating shaft 64 to rotate 180 degrees through the transmission belt 63 and two transmission wheels 62. After the rotating shaft 64 rotates, it drives the L-shaped frame 3 to rotate, thereby positioning the first support 51 in the upper position. Then, inject another solution into the sample tube 55 through the feeding tube 56 on the first support 51. During the rotation of the rotating shaft 64, it drives the turntable 14 to rotate. When the turntable 14 rotates, it drives the connecting seat 12 to move downward through the connecting rod 15, so that the connecting rod 10 compresses the spring 11. At this time, the first support 51 is in the upper position. Turn on the solenoid valve 57 on the first support 51. At this time, the spring 11 in the compressed state acts. The piston 8 is pushed downwards, causing the air pressure inside the first support 51 to rise through the second tube 73 and the corresponding solenoid valve 57. Under the action of air pressure, the solution inside the first support 51 quickly permeates into the sand sample. Conversely, when the second support 53 rotates upwards, the solenoid valve 57 on the first support 51 is closed, and the solenoid valve 57 on the second support 53 is opened. At this time, the piston 8, under the action of the transmission rod 9, connecting rod 10, connecting seat 12, connecting rod 15 and turntable 14, rises with the help of the spring 11, which in turn causes the air pressure inside the second support 53 to rise. This allows the solution inside the second support 53 to quickly permeate into the sand sample, so that the two solutions can be mixed in the sand. Through the pressure difference between the two ends of the sample tube 55, the solution quickly permeates the sample, thereby improving the efficiency of the experiment.

[0088] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0089] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A biomimetic triaxial test sample preparation device for chemically induced calcium carbonate precipitation and solidification of sandy soil, characterized in that, include: The base (1) has a support plate (2) on its top and an L-shaped frame (3) rotatably mounted on the side wall of the support plate (2). Fixing component (4), which is slidably mounted on L-shaped frame (3); The triaxial test assembly (5) is connected by a fixing assembly (4) and an L-shaped frame (3); A power assembly (6) is disposed on the top of the base (1) and is used to drive the L-shaped frame (3) to rotate. A booster assembly (7) is disposed on the top of the base (1). The booster assembly (7) is connected to the top and bottom of the triaxial test assembly (5). The booster assembly (7) and the power assembly (6) form a transmission connection. The fixing component (4) includes: A sliding plate (41) is slidably connected to an L-shaped frame (3), and both the top of the L-shaped frame (3) and the top of the sliding plate (41) are provided with round holes; and The first lead screw (42) is rotatably mounted on the L-shaped frame (3), and the top of the sliding plate (41) is provided with a threaded hole, which is adapted to the first lead screw (42); The triaxial test assembly (5) includes: The first support (51) has a plurality of fastening components (52) on its side wall; The second support (53) is connected to multiple fastening components (52). The first support (51) and the second support (53) are both provided with limiting rods (54), and the limiting rods (54) are adapted to the round holes. The sample tube (55) is disposed between the first support (51) and the second support (53); There are two feeding pipes (56), which are respectively installed through the first support (51) and the second support (53); and There are two solenoid valves (57), and the two solenoid valves (57) are respectively installed on the first support (51) and the second support (53); The power assembly (6) includes: Motor (61), said motor (61) is fixed to the top of base (1); There are two drive wheels (62), both of which are rotatably mounted on the side wall of the support plate (2). One of the drive wheels (62) is fixed to the output shaft of the motor (61), and the two drive wheels (62) are fitted with the same drive belt (63). A rotating shaft (64) is rotatably mounted on the side wall of the support plate (2), and the rotating shaft (64) and another transmission wheel (62) are fixed. The end of the rotating shaft (64) is fixed to the L-shaped frame (3). The booster assembly (7) includes: The tank (71) is fixed to the top of the base (1). A first tube (72) is provided through the top of the side wall of the tank (71), and the first tube (72) is connected to one of the solenoid valves (57). A second tube (73) is provided through the bottom of the side wall of the tank (71), and the second tube (73) is connected to another solenoid valve (57).

2. The biomimetic chemically induced calcium carbonate precipitation and solidification triaxial test sample preparation device for sandy soil according to claim 1, characterized in that, The fastening assembly (52) includes: A fixing block (521) is fixed on the side wall of the first support (51). A rotating seat (522) is rotatably mounted on the fixing block (521). A second lead screw (523) is fixed on the top of the rotating seat (522). A fixing seat (524) is fixed to the side wall of the second support (53), the side wall of the fixing seat (524) has a notch, and the second lead screw (523) passes through the notch; and Connecting block (525), which is connected by threads and a second lead screw (523).

3. The triaxial test sample preparation device for biomimetic chemically induced calcium carbonate precipitation and solidification of sand as described in claim 2, characterized in that, Also includes: Piston (8), which is slidably disposed on the inner wall of the tank body (71); A transmission rod (9) is fixed to the top of the piston (8) and passes through the top of the tank (71). A circular groove is provided on the top of the transmission rod (9). A connecting rod (10) is slidably disposed in a circular groove. A spring (11) is provided at the bottom end of the connecting rod (10), and the spring (11) is fixed to the inner wall of the circular groove. A connecting seat (12) is fixed at the top end of the connecting rod (10).

4. The biomimetic chemically induced calcium carbonate precipitation and solidification triaxial test sample preparation device for sandy soil according to claim 3, characterized in that, Also includes: A fixing plate (13) is fixed to the top of the tank body (71). A turntable (14) is rotatably provided on the side wall of the fixing plate (13), and the turntable (14) and the rotating shaft (64) are fixed. The connecting rod (15) is rotatably disposed at the eccentric position on the side wall of the turntable (14), and the connecting rod (15) and the connecting seat (12) are rotatably connected.

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