Triaxial test sample preparation device for solidifying sandy soil through biomimetic chemical induction of calcium carbonate precipitation

Abstract

The invention relates to the technical field of sandy soil solidification tests, and discloses a triaxial test sample preparation device for solidifying sandy soil through biomimetic chemical induction of calcium carbonate precipitation, the triaxial test sample preparation device comprises a base, the top of the base is provided with a support plate, and the side wall of the support plate is rotatably provided with an L-shaped frame; the fixing assembly is arranged on the L-shaped frame in a sliding manner; the triaxial test assembly is connected with the L-shaped frame through a fixing assembly; the power assembly is arranged at the top of the base, and the power assembly is used for driving the L-shaped frame to rotate; the pressurization assembly is arranged at the top of the base, the pressurization assembly is communicated with the top and the bottom of the triaxial test assembly, and the pressurization assembly and the power assembly form transmission fit. The invention aims to improve the solution permeation speed so as to avoid the problem that two solutions react on the surface of a sample, so that calcium carbonate precipitates cannot be formed in the sample, and wrong data is generated.

Description

Technical Field

[0001] The invention relates to the technical field of sand solidification test, in particular to a triaxial test sample preparation device for sand solidification by bionic chemical induction of calcium carbonate precipitation. Background Art

[0002] Inducing calcium carbonate precipitation is a simple and effective process. The principle is to generate calcium carbonate precipitates through the reaction of calcium ions and carbonate ions. The precipitates adhere to the surface of the bonded matrix material, which not only makes the surface rougher, but also fills small gaps, thereby increasing the strength. Microbial induced calcium carbonate reinforcement is essentially a calcium carbonate precipitation technology based on biomineralization. Since it uses living microorganisms, it has certain limitations.

[0003] In the sample preparation process of bionic chemical induced calcium carbonate precipitation solidification sand, two solutions containing carbonate ions and calcium ions are usually used to spray and penetrate the sand sample respectively. Since the two solutions will react after mixing, in order to ensure the test effect, it is necessary to ensure the speed of solution penetration to avoid the two solutions reacting on the sample surface, resulting in the failure to form calcium carbonate precipitation inside the sample and generating erroneous data. Therefore, a triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation solidification sand is proposed. Summary of the invention

[0004] The purpose of the present invention is to increase the speed of solution penetration to avoid the reaction of two solutions on the sample surface, resulting in the inability to form calcium carbonate precipitation inside the sample and the generation of erroneous data. A triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation solidification sand is proposed.

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

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

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

[0008] A fixing assembly, wherein the fixing assembly is slidably disposed on the L-shaped frame;

[0009] A triaxial test assembly, wherein the triaxial test assembly is connected via a fixing assembly and an L-shaped frame;

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

[0011] A booster assembly is arranged on the top of the base, the booster assembly is connected to the top and bottom of the triaxial test assembly, and the booster assembly and the power assembly form a transmission match.

[0012] Based on the above technical solution, the present invention can also be improved as follows.

[0013] Furthermore, the fixing assembly includes:

[0014] A sliding plate, wherein the sliding plate is slidably connected to the L-shaped frame, and a circular hole is formed on the top of the L-shaped frame and the top of the sliding plate; and

[0015] A first screw rod is rotatably arranged on the L-shaped frame, a threaded hole is provided on the top of the sliding plate, and the threaded hole is adapted to the first screw rod.

[0016] Furthermore, the triaxial test assembly comprises:

[0017] A first support, wherein a plurality of fastening components are disposed on a side wall of the first support;

[0018] A second support, wherein the second support is connected to a plurality of fastening components, and the first support and the second support are both provided with limiting rods, and the limiting rods are both adapted to the circular holes;

[0019] A sample tube, wherein the sample tube is disposed between the first support and the second support;

[0020] There are two feeding pipes, which are respectively disposed on the first support and the second support; and

[0021] There are two solenoid valves, which are respectively arranged on the first support and the second support.

[0022] Furthermore, the fastening assembly includes:

[0023] A fixed block, the fixed block is fixed on the side wall of the first support, a rotating seat is rotatably provided on the fixed block, and a second screw rod is fixed on the top of the rotating seat;

[0024] A fixing seat, the fixing seat is fixed on the side wall of the second support, the side wall of the fixing seat is provided with a notch, and the second screw rod passes through the notch; and

[0025] A connecting block is connected to the second screw rod via a thread.

[0026] Furthermore, the power assembly includes:

[0027] A motor, wherein the motor is fixed on the top of the base;

[0028] There are two transmission wheels, both of which are rotatably arranged on the side wall of the support plate, one of which is fixed to the output shaft of the motor, and the side walls of the two transmission wheels are sleeved with the same transmission belt;

[0029] The rotating shaft is rotatably arranged on the side wall of the support plate, and the rotating shaft is fixed to another transmission wheel, and the end of the rotating shaft is fixed to the L-shaped frame.

[0030] Furthermore, the booster assembly includes:

[0031] The tank body is fixed on the top of the base, a first tube body is arranged through the top of the tank body side wall, and the first tube body is connected to one of the solenoid valves, a second tube body is arranged through the bottom of the tank body side wall, and the second tube body is connected to another solenoid valve.

[0032] Furthermore, it also includes:

[0033] A piston, wherein the piston is slidably disposed on the inner wall of the tank body;

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

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

[0036] Furthermore, it also includes:

[0037] A fixed plate, the fixed plate is fixed to the top of the tank body, a rotating disk is rotatably arranged on the side wall of the fixed plate, and the rotating disk and the rotating shaft are fixed;

[0038] A connecting rod is rotatably arranged at an eccentric position of a side wall of the turntable, and the connecting rod is rotatably connected to a connecting seat.

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

[0040] The present invention firmly fixes the triaxial test assembly on the L-shaped frame through a fixing assembly. This design not only ensures the stability of the test assembly, but also enables it to be flexibly adjusted through the rotation of the L-shaped frame. The addition of the power assembly provides a reliable power source for the rotation of the L-shaped frame, so that the triaxial test assembly can achieve a 180-degree flip. This flipping function 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 is connected to the top and bottom of the triaxial test assembly, and 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 push the solution to penetrate deeper into the sand and interact with the internal calcium ions and Carbonate ions react to form calcium carbonate precipitation. The device realizes the reciprocating rotation of the triaxial test assembly through the reciprocating work of the power assembly. This means that during the test, the two ends of the triaxial test assembly will be alternately at the top, allowing two solutions containing carbonate ions and calcium ions to alternately penetrate into the sand sample. This alternating penetration method effectively avoids the problem of mixing reaction of the two solutions on the sample surface, ensuring that calcium carbonate precipitation can be evenly formed inside the sand. In summary, the triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation and solidification of sand achieves effective control of solution penetration speed, mixing reaction and test efficiency through the ingenious cooperation of the power assembly, L-shaped frame, triaxial test assembly and booster assembly. This design not only improves the accuracy and reliability of the test, but also provides strong technical support for the research on bionic chemical induced calcium carbonate precipitation and solidification of sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0042] Figure 2 It is a schematic diagram of the structure of the fixed block, the rotating seat and the second screw rod of the present invention;

[0043] Figure 3 It is a schematic diagram of the cross-sectional structure of the tank body of the present invention;

[0044] Figure 4 It is a schematic diagram of the cross-sectional structure of the transmission rod of the present invention.

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

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Combination Figure 1-Figure 4 As shown, a triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation and solidification of sand soil of the present invention comprises:

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

[0049] A fixing component 4, the fixing component 4 is slidably arranged on the L-shaped frame 3;

[0050] A triaxial test assembly 5, the triaxial test assembly 5 is connected to the L-shaped frame 3 via the fixing assembly 4;

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

[0052] The booster assembly 7 is arranged 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 match.

[0053] The core components of the device include a base 1, a support plate 2 is fixed on the top of the base 1, an L-shaped frame 3 is rotatably arranged on the side wall of the support plate 2, a fixing component 4 is slidably arranged on the L-shaped frame 3, and the fixing component 4 is used to connect and fix the triaxial test component 5. The triaxial test component 5 is firmly connected with the fixing component 4 and the L-shaped frame 3 to ensure that it will not shake or fall off during the test. A power component 6 is also arranged on the top of the base 1. The main function of the power component 6 is to drive the L-shaped frame 3 to rotate. When the motor 61 is started, the transmission belt 63 and the two transmission wheels 62 are used to drive the rotating shaft 64 to rotate, thereby driving the L-shaped frame 3 to rotate around the axis of the support plate 2 to achieve the flipping of the triaxial test component 5. In addition, a booster component 7 is also arranged on the top of the base 1. The pressure component 7 is connected to the top and bottom of the triaxial test component 5. When the power component 6 drives the L-shaped frame 3 to rotate, the booster component 7 and the power component 6 form a transmission cooperation. Specifically, when the L-shaped frame 3 rotates, the piston 8 in the booster component 7 can be driven to move, thereby changing the air pressure inside the tank body 71. This air pressure change is transmitted to the inside of the triaxial test component 5 through the first tube body 72 and the second tube body 73, thereby realizing the regulation of the penetration rate of the solution in the sample tube 55. In summary, the triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation and solidification of sand of the present invention drives the L-shaped frame 3 to rotate through the power component 6, and cooperates with the booster component 7 to realize air pressure changes, thereby accelerating the penetration and mixing reaction of the solution, and improving the accuracy and efficiency of the test.

[0054] In a preferred embodiment, the present invention can be further configured as follows: Figures 1 to 4 As shown; the fixing assembly 4 comprises:

[0055] A sliding plate 41, the sliding plate 41 is slidably connected to the L-shaped frame 3, and a circular hole is formed on the top of the L-shaped frame 3 and the top of the sliding plate 41;

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

[0057] The first screw rod 42 is operated to make the sliding plate 41 descend, and the triaxial test assembly 5 and the L-shaped frame 3 can be fixed by the circular holes on the sliding plate 41 and the circular holes on the L-shaped frame 3 in cooperation with the limiting rod 54. The fixing assembly 4 is mainly composed of the sliding plate 41 and the first screw rod 42. The sliding plate 41 is slidably connected to the L-shaped frame 3. This sliding connection allows the sliding plate 41 to move along a certain direction on the L-shaped frame 3. Circular holes are provided at the top of the L-shaped frame 3 and the top of the sliding plate 41. These circular holes are used for subsequent cooperation with the limiting rod 54. The first screw rod 42 is rotatably set 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 provided on the top of the sliding plate 41, which means that when the first screw rod 42 rotates, due to the interaction of the threads, the sliding plate 41 will move along the axis of the first screw rod 42 The limiting rod 54 is moved in the direction, that is, it is lifted and lowered. When the triaxial test assembly 5 needs to be fixed, the rotation direction of the first screw rod 42 is first adjusted so that the sliding plate 41 descends along the L-shaped frame 3. As the sliding plate 41 descends, the circular hole on its top will gradually approach the circular hole on the top of the L-shaped frame 3. At this time, the limiting rod 54 is inserted into the circular 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 circular hole, it is necessary to fully insert it with 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 fully inserted and passes through the two circular 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, in the subsequent test process, the triaxial test assembly 5 can maintain a stable position and posture to ensure the accuracy and reliability of the test.

[0058] In a preferred embodiment, the present invention can be further configured as follows: Figures 1 to 4 As shown; the triaxial test assembly 5 includes:

[0059] A first support 51, a side wall of which is provided with a plurality of fastening components 52;

[0060] A second support 53, the second support 53 is connected to a plurality of fastening components 52, and a limiting rod 54 is disposed on both the first support 51 and the second support 53, and the limiting rod 54 is adapted to the circular hole;

[0061] A sample tube 55, wherein the sample tube 55 is disposed between the first support 51 and the second support 53;

[0062] Two feeding pipes 56, which are respectively arranged on the first support 51 and the second support 53;

[0063] Two solenoid valves 57 are respectively arranged on the first support 51 and the second support 53. The first support 51 is used as the main supporting structure. A plurality of fastening components 52 are arranged on its side wall. These fastening components 52 are used to firmly connect the second support 53 to the first support 51 to form a stable supporting frame. In this supporting frame, the sample tube 55 is arranged between the first support 51 and the second support 53 to accommodate and support the test sample. In order to ensure the stability and position accuracy of the sample tube 55 during the test, the first support 51 and the second support 53 are both provided with limiting rods 54. These limiting rods 54 are adapted to the circular holes on the aforementioned sliding plate 41 and the L-shaped frame 3. When they are inserted into this When some circular holes are formed, 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 necessary. In addition, two feeding tubes 56 are respectively arranged on the first support 51 and the second support 53, which allow test personnel to add test materials to the sample tube 55. The design of these feeding tubes 56 makes the process of adding materials more convenient and efficient. Finally, two solenoid valves 57 are respectively arranged on the first support 51 and the second support 53, which are used to control the switch of the feeding tube 56. By opening or closing the solenoid valve 57, the test personnel can accurately control the amount and time of adding the test material, thereby ensuring the accuracy and reliability of the test.

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

[0065] A fixed block 521, the fixed block 521 is fixed on the side wall of the first support 51, a rotating seat 522 is rotatably provided on the fixed block 521, and a second screw rod 523 is fixed on the top of the rotating seat 522;

[0066] A fixing seat 524, the fixing seat 524 is fixed on the side wall of the second support 53, the side wall of the fixing seat 524 is provided with a notch, and the second screw rod 523 passes through the notch;

[0067] The connecting block 525 is connected to the second screw rod 523 via a thread.

[0068] The first support 51 is placed on the sample tube 55. Through the action of the rotating seat 522, the second screw rod 523 is rotated to the notch of the fixed seat 524. The connecting block 525 is rotated to cooperate with the fixed seat 524 to realize the fixation between the second support 53, the sample tube 55 and the first support 51. The fixed block 521 is firmly fixed on the side wall of the first support 51. On the fixed block 521, the rotating seat 522 is set and allowed to rotate. The second screw rod 523 is fixed on the top of the rotating seat 522. This is a key connection and adjustment component. Then, the fixed seat 524 is fixed on the side wall of the second support 53. A notch is opened on the side wall of the fixed seat 524. The notch is designed to allow the second screw rod 523 to pass through and cooperate with it. When a support 51 is placed on the sample tube 55, the fastening assembly 52 can be used to perform the fixing operation. By rotating the rotating seat 522, the second screw rod 523 can be driven to rotate and pass it through the gap of the fixed seat 524. At this time, the connecting block 525 can be connected to the second screw rod 523 through a thread. In order to achieve a firm fixation between the second support 53, the sample tube 55 and the first support 51, it is necessary to rotate the connecting block 525. Since the connecting block 525 and the second screw rod 523 are connected by threads, when the connecting block 525 rotates, it will move along the axial direction of the second screw rod 523. This movement will cause the connecting block 525 to gradually approach and fit closely to the fixed seat 524, thereby achieving a firm fixation between the three.

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

[0070] The motor 61 is fixed on the top of the base 1;

[0071] Two transmission wheels 62, both of which are rotatably arranged on the side wall of the support plate 2, one of which is fixed to the output shaft of the motor 61, and the side walls of the two transmission wheels 62 are sleeved with the same transmission belt 63;

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

[0073] Turn on the switch of 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 the two transmission wheels 62. After the rotating shaft 64 rotates, it drives the L-shaped frame 3 to rotate. The motor 61 is firmly fixed to the top of the base 1. The output shaft of the motor 61 is fixedly connected to a transmission wheel 62, which means that when the motor 61 is working, it will drive the transmission wheel 62 to rotate. Then, the two transmission wheels 62 are rotatably set on the side wall of the support plate 2. In addition to the transmission wheel 62 fixed to the output shaft of the motor 61, the other transmission wheel 62 is fixedly connected to the rotating shaft 64. In this way, when the first transmission wheel 62 rotates, it will transmit power to the second transmission wheel 62 through the 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, which means that when the rotating shaft 64 rotates, it will drive the L-shaped frame 3 to rotate. When the position or angle of the L-shaped frame 3 needs to be adjusted, just 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 accurately adjusted by the controller, it can ensure that the L-shaped frame 3 rotates to the required position or angle.

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

[0075] The tank body 71 is fixed on the top of the base 1, and a first tube body 72 is provided through the top of the side wall of the tank body 71, and the first tube body 72 is connected to one of the solenoid valves 57, and a second tube body 73 is provided through the bottom of the side wall of the tank body 71, and the second tube body 73 is connected to another solenoid valve 57. It should also be noted that a rotary encoder is also provided, and the rotary encoder is connected to the motor 61 and the controller to control the rotation angle of the motor 61, wherein the motor 61 rotates 180 degrees clockwise and then rotates 180 degrees counterclockwise to avoid distortion of the first tube body 72 and the second tube body 73, which affects normal gas supply. The first tube body 72 and the second tube body 73 are both hoses.

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

[0077] A piston 8, the piston 8 is slidably disposed on the inner wall of the tank body 71;

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

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

[0080] During the movement of the piston 8, there is a pressure difference between the air pressure above and below the piston 8 inside the tank body 71. The first support 51 is at the top, and the switch of the solenoid valve 57 on the first support 51 is turned on. At this time, under the action of the compressed spring 11, the piston 8 is pushed downward, and the air pressure inside the first support 51 rises through the second tube body 73 and the corresponding solenoid valve 57. Under the action of the air pressure, the solution inside the first support 51 quickly penetrates 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, the piston 8 rises in cooperation with the spring 11 under the action of the transmission rod 9, the connecting rod 10, the connecting seat 12, the connecting rod 15 and the turntable 14, thereby causing the air pressure inside the second support 53 to rise, and thereby allowing the solution inside the second support 53 to quickly penetrate into the sand sample.

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

[0082] A fixed plate 13, the fixed plate 13 is fixed to the top of the tank body 71, a rotating disk 14 is rotatably arranged on the side wall of the fixed plate 13, and the rotating disk 14 and the rotating shaft 64 are fixed;

[0083] The connecting rod 15 is rotatably arranged at an eccentric position of a side wall of the rotating disk 14 , and the connecting rod 15 is rotatably connected to the 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 connected, the piston 8 is pushed to move under the action of the spring 11, and the first tube body 72 and the second tube body 73 are cooperated to realize the air pressure change inside the first support 51 and the second support 53, thereby assisting the solution to penetrate into the sample.

[0085] The specific working principle of the triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation and solidification of sand soil of the present invention is as follows:

[0086] When in use, first connect the first support 51 to the L-shaped frame 3 through the limiting rod 54 and the circular hole, then place the sample tube 55 on the first support 51, then place the sand sample in the sample tube 55, place the permeable stone at the bottom of the sample tube 55, compact the sample, and place another permeable stone on the top of the sample. The sample can be confined inside the sample tube 55 by the two permeable stones, and then place the second support 53 on the sample tube 55. Through the action of the rotating seat 522, rotate the second screw rod 523 to the notch of the fixed seat 524, rotate the connecting block 525, and cooperate with the fixed seat 524 to achieve the fixation between the second support 53, the sample tube 55 and the first support 51;

[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 switch of the motor 61. When the motor 61 is working, the transmission belt 63 and the two transmission wheels 62 drive the shaft 64 to rotate 180 degrees. After the shaft 64 rotates, it drives the L-shaped frame 3 to rotate, so that the first support 51 is at the upper position, and then another solution is injected into the sample tube 55 through the feeding tube 56 on the first support 51. During the rotation of the shaft 64, the turntable 14 is driven to rotate. When the turntable 14 rotates, the connecting seat 12 is driven downward through the connecting rod 15, so that the connecting rod 10 compresses the spring 11. At this time, the first support 51 is at the upper side, and the switch of the solenoid valve 57 on the first support 51 is turned on. At this time, the spring 11 in the compressed state acts Under the action of the air pressure, the piston 8 is pushed downward to increase the air pressure inside the first support 51 through the second tube body 73 and the corresponding solenoid valve 57. The solution inside the first support 51 quickly penetrates into the sand sample under the action of the air pressure. On the contrary, when the second support 53 rotates to the upper side, 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 rises in cooperation with the spring 11 under the action of the transmission rod 9, the connecting rod 10, the connecting seat 12, the connecting rod 15 and the turntable 14, thereby increasing the air pressure inside the second support 53. The solution inside the second support 53 can quickly penetrate into the sand sample, so that the two solutions can be mixed in the sand. The solution can quickly penetrate into the sample through the pressure difference at both ends of the sample tube 55, thereby improving the efficiency of the experiment.

[0088] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

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

Claims

1. A triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation and solidification of sand, characterized in that: include: A base (1), wherein a support plate (2) is arranged on the top of the base (1), and an L-shaped frame (3) is rotatably arranged on the side wall of the support plate (2); A fixing component (4), wherein the fixing component (4) is slidably arranged on the L-shaped frame (3); A triaxial test assembly (5), wherein the triaxial test assembly (5) is connected to the L-shaped frame (3) via a fixing assembly (4); A power assembly (6), wherein 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; A booster assembly (7), wherein the booster assembly (7) is arranged on the top of the base (1), the booster assembly (7) is connected to the top and bottom of the triaxial test assembly (5), and the booster assembly (7) and the power assembly (6) form a transmission match.

2. The triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation and solidification of sand according to claim 1 is characterized in that: The fixing assembly (4) comprises: A sliding plate (41), wherein the sliding plate (41) is slidably connected to the L-shaped frame (3), and a circular hole is provided on the top of the L-shaped frame (3) and the top of the sliding plate (41); and A first screw rod (42) is rotatably arranged on the L-shaped frame (3); a threaded hole is provided on the top of the sliding plate (41), and the threaded hole is adapted to fit the first screw rod (42).

3. The triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation and solidification of sand according to claim 2 is characterized in that: The triaxial test assembly (5) comprises: A first support (51), wherein a plurality of fastening components (52) are disposed on a side wall of the first support (51); A second support (53), wherein the second support (53) is connected to a plurality of fastening components (52), and both the first support (51) and the second support (53) are provided with limiting rods (54), and the limiting rods (54) are adapted to the circular holes; A sample tube (55), wherein the sample tube (55) is disposed between the first support (51) and the second support (53); There are two feeding pipes (56), and the two feeding pipes (56) are respectively arranged on the first support (51) and the second support (53); and There are two solenoid valves (57), and the two solenoid valves (57) are respectively arranged on the first support (51) and the second support (53).

4. The triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation and solidification of sand according to claim 3 is characterized in that: The fastening assembly (52) comprises: A fixed block (521), the fixed block (521) being fixed on a side wall of the first support (51), a rotating seat (522) being rotatably arranged on the fixed block (521), and a second screw rod (523) being fixed on the top of the rotating seat (522); A fixing seat (524), wherein the fixing seat (524) is fixed on a side wall of the second support (53), a notch is provided on the side wall of the fixing seat (524), and the second screw rod (523) passes through the notch; and A connecting block (525), wherein the connecting block (525) is connected to the second screw rod (523) via a thread.

5. The triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation and solidification of sand according to claim 4, characterized in that: The power assembly (6) comprises: A motor (61), wherein the motor (61) is fixed on the top of the base (1); There are two transmission wheels (62), both of which are rotatably arranged on the side wall of the support plate (2), one of the transmission wheels (62) is fixed to the output shaft of the motor (61), and the side walls of the two transmission wheels (62) are sleeved with the same transmission belt (63); A rotating shaft (64) is rotatably arranged on the side wall of the support plate (2), and the rotating shaft (64) and another transmission wheel (62) are fixed, and the end of the rotating shaft (64) is fixed to the L-shaped frame (3).

6. The triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation and solidification of sand according to claim 5, characterized in that: The booster assembly (7) comprises: A tank body (71), wherein the tank body (71) is fixed on the top of the base (1), a first tube body (72) is provided through the top of the side wall of the tank body (71), and the first tube body (72) is connected to one of the solenoid valves (57), and a second tube body (73) is provided through the bottom of the side wall of the tank body (71), and the second tube body (73) is connected to another solenoid valve (57).

7. The triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation and solidification of sand according to claim 6, characterized in that: Also includes: A piston (8), wherein the piston (8) is slidably disposed on the inner wall of the tank body (71); A transmission rod (9), the transmission rod (9) is fixed to the top of the piston (8), and the transmission rod (9) passes through the top of the tank body (71), and a circular groove is formed on the top of the transmission rod (9); A connecting rod (10) is slidably arranged in the circular groove, a spring (11) is arranged at the bottom end of the connecting rod (10), and the spring (11) is fixed to the inner wall of the circular groove, and a connecting seat (12) is fixed at the top end of the connecting rod (10).

8. The triaxial test sample preparation device for bionic chemical induced calcium carbonate precipitation and solidification of sand according to claim 7, characterized in that: Also includes: A fixed plate (13), the fixed plate (13) being fixed on the top of the tank body (71), a rotating disk (14) being rotatably arranged on the side wall of the fixed plate (13), and the rotating disk (14) and the rotating shaft (64) being fixed; A connecting rod (15) is rotatably arranged at an eccentric position of a side wall of the rotating disk (14), and the connecting rod (15) is rotatably connected to a connecting seat (12).

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