Subsurface Environment Simulation Device and Working Method Based on Soil Pressure and Ion Erosion

Abstract

This invention discloses a subsurface environment simulation device and its working method based on soil pressure and ion erosion. It can ensure uniform control of ion distribution and simultaneously simulate the effects of soil pressure and corrosive ions, realistically reproducing the synergistic influence of multiple factors on materials in the subsurface environment. The technical solution includes: the experimental chamber consists of two semi-circular pressure transmission plates, an upper cover plate, and a lower cover plate, respectively located at both ends of the semi-circular pressure transmission plates; a test frame is also provided outside the experimental chamber; a pressure rod is provided between the pressure transmission plates and the test frame; the corrosive ion injection system is composed of a spiral pipe arranged around the test block, with multiple micropores evenly distributed on the wall of the spiral pipe; the data acquisition elements in the data monitoring system are located in the soil and connected to a data acquisition device, which records and transmits data to a computer terminal.

Description

Technical Field

[0001] This invention belongs to the field of coastal underground service environment simulation, specifically involving an underground environment simulation device and working method based on soil pressure and ion erosion. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Currently, in coastal environments, the service environment of pipelines and other underground structures is becoming increasingly complex. Under the combined effects of soil pressure and various chemical erosions, the performance of the structures and materials of underground structures is gradually deteriorating. In particular, the unpredictable nature of the current climate and natural environment has led to an increase in the types and quantities of corrosive ions in the soil. For example, in acidic, saline-alkaline, or high-moisture soils, corrosive ions (such as sulfate and chloride ions) penetrate into the material, working synergistically with soil pressure to cause pipeline cracking, concrete surface spalling, and even complete destruction.

[0004] In actual underground environments, material degradation is often the result of the combined effects of multiple factors; however, most actual simulation experiments on the durability of underground structures and pipeline materials focus on the influence of a single factor. There are problems such as the experimental devices being unable to simultaneously simulate soil pressure and chemical erosion, the diffusion of corrosive ions being difficult to control uniformly in existing experiments, and the impact of soil compaction on pressure transmission, material stress state, and changes in the erosion environment not being considered. Summary of the Invention

[0005] To address the aforementioned issues, the present invention provides an underground environment simulation device and working method based on soil pressure and ion erosion. This device can dynamically adapt to soil pressure, uniformly control ion distribution, and ensure long-term sealing. It is an experimental device that can simultaneously simulate the effects of soil pressure and corrosive ions, and can realistically reproduce the comprehensive impact of multiple factors on materials in the underground environment.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] In a first aspect, the present invention provides an underground environment simulation device based on soil pressure and ion erosion, comprising: a test chamber, a loading system, a data monitoring system, and an erosive ion injection system;

[0008] The test chamber consists of two semi-circular pressure transmission plates, an upper cover plate, and a lower cover plate. The two semi-circular pressure transmission plates form a cylindrical structure. The interior of the test chamber is used to fill the test block and soil. The upper cover plate and the lower cover plate are respectively located at both ends of the semi-circular pressure transmission plates. A test frame is also provided outside the test chamber. The loading system consists of multiple pressure rods, which are located between the pressure transmission plates and the test frame. The corrosive ion implantation system is composed of a spiral pipe arranged around the test block. Multiple micropores are evenly distributed on the wall of the spiral pipe, and each micropore on the wall of the spiral pipe is equipped with a filter device.

[0009] The device is equipped with a data monitoring system, which includes data acquisition elements and data collection devices. The data acquisition elements are placed in the soil and are all connected to the data acquisition devices. The data collection devices record and transmit data to a computer terminal.

[0010] Furthermore, the pressure transmission plate of the test chamber is made of two semi-circular steel plates, and the upper cover plate and lower cover plate are also made of steel plates. The two pressure transmission plates are connected by a mortise and tenon structure.

[0011] Furthermore, the sealing system includes a baffle and a sealing strip. The baffle is provided with an insert plate, which is embedded between the tenon and the groove of the pressure transmission plate. The sealing strip is disposed between the upper cover plate, the lower cover plate, and the two semi-circular pressure transmission plates.

[0012] Furthermore, the pressure rods are evenly distributed on the pressure transmission plate, one end of the pressure rod is connected to the outside of the pressure transmission plate, and the other end of the pressure rod is fixedly connected to the test frame.

[0013] Furthermore, both pressure transmission plates are equipped with multiple pressure rods of the same number.

[0014] Furthermore, the spiral pipe is made of corrosion-resistant material and has multiple micropores evenly distributed on the pipe wall, with each micropore on the pipe wall equipped with a filter device.

[0015] Furthermore, a set distance is maintained between the spiral pipe and the test block.

[0016] Furthermore, the data acquisition elements include a pressure sensor, a temperature and humidity sensor, a pH meter, and an ion concentration detection device, used to monitor pressure changes, soil conditions, and ion concentration distribution in real time.

[0017] Furthermore, the pressure transmission plate and baffles in the simulation device are all made of corrosion-resistant materials.

[0018] Secondly, the present invention also provides a method for operating a subsurface environment simulation device based on soil pressure and ion erosion, comprising:

[0019] S1. Place the test block in the designated position inside the cylindrical test chamber, and then fill the chamber with soil to ensure that the test block is completely surrounded by soil, while ensuring that the spiral pipe maintains a set distance from the test block.

[0020] S2. Force is applied to the pressure rod by hydraulic or mechanical means. The same number of pressure rods are arranged on the two pressure transmission plates to make the pressure in the test chamber uniformly distributed by multi-point loading.

[0021] S3. Inject the prepared corrosive ionic solution into the spiral pipe, so that the solution is evenly released into the soil through the micropores evenly distributed on the pipe wall and diffused to the surface of the test block;

[0022] S4. Throughout the entire experiment, the pressure sensor, temperature and humidity sensor, pH meter and ion concentration detection device installed in the test chamber will monitor the data of pressure changes, soil conditions and ion concentration distribution in real time, and transmit the monitoring data to the computer terminal through the acquisition device.

[0023] S5. After the test is completed, analyze the dynamic changes during the test; at the same time, clean, maintain or reuse the equipment.

[0024] Compared with the prior art, the advantages and positive effects of this invention are:

[0025] The test chamber of this invention, filled with test blocks and soil, can simulate the stress and erosion mechanisms of pipes in a real underground environment. By rationally setting the distance between the spiral pipe and the test block, and injecting corrosive ion solutions, it can better simulate the diffusion path and erosion mechanism of ions in the underground environment. The pressure transmission plate of the test chamber adopts a two-piece splicing form, which can adapt to the change of soil from loose to dense, ensuring effective transmission of loading force. The spiral pipe of the corrosive ion injection system is made of corrosion-resistant material, and the micropores in the pipe wall are equipped with a filter device to prevent soil particles from clogging the pipe and causing test errors. The spiral structure of the pipe design can ensure uniform ion distribution and avoid local ion concentration accumulation, accurately simulating the concentration distribution of corrosive ions in the underground environment. The data monitoring system can monitor pressure changes, soil conditions, and ion concentration distribution in real time, and transmit the data to a computer terminal for easy analysis of dynamic changes during the test.

[0026] The pressure transmission plate of the test chamber of this invention adopts a mortise and tenon structure connection, with the tenon and groove fitting together. It can dynamically fit under the action of external loading force, adapting to the change of soil from loose to dense, avoiding the separation of the test chamber wall and soil due to the shrinkage of soil volume caused by continuous external load pressure, and ensuring effective transmission of loading force. The baffle can dynamically fill the gap changes caused by soil compaction, preventing soil particles from leaking out. At the same time, flexible sealing strips are set on the edges of the upper and lower cover plates to prevent soil leakage due to changes in the diameter of the cover plates, ensuring the integrity of the test environment. The pressure rods are evenly distributed on the pressure transmission plate, and the same number of pressure rods are arranged on the two pressure transmission plates. Force is applied by hydraulic or mechanical means to make the pressure in the test chamber evenly distributed through multi-point loading, avoiding the concentration of loading force. The mortise and tenon structure of the pressure transmission plate will always fit the soil as the soil volume changes, ensuring that the loading force can be effectively transmitted to the soil interior, simulating the real underground pressure environment. Attached Figure Description

[0027] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0028] Figure 1 This is a structural diagram of the simulation device of the present invention;

[0029] Figure 2 This is a diagram of the external structure of the test chamber of the present invention;

[0030] Figure 3 This is a diagram of the internal structure of the test chamber of the present invention.

[0031] In the diagram: 1. Test chamber; 2. Pressure rod; 3. Test frame; 4. Pressure transmission plate; 5. Upper cover plate; 6. Lower cover plate; 7. Sealing strip; 8. Insert plate; 9. Baffle plate; 10. Spiral pipe. Detailed Implementation

[0032] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] The underground environment simulation device based on soil pressure and ion erosion disclosed in this embodiment, such as Figures 1-3 As shown, the system includes a test chamber 1, a loading system, a data monitoring system, and an aggressive ion implantation system. The test chamber 1 consists of two semi-circular pressure transmission plates 4, an upper cover plate 5, and a lower cover plate 6. The two semi-circular pressure transmission plates 4 form a cylindrical structure, and the interior of the test chamber is used to fill test blocks and soil. The upper cover plate 5 and the lower cover plate 6 are respectively located at both ends of the semi-circular pressure transmission plates 4. A U-shaped test frame 3 is also provided outside the test chamber 1. The loading system consists of multiple evenly distributed pressure rods 2, one end of which is connected to the outside of the pressure transmission plates 4. The aggressive ion implantation system consists of a spiral pipe 10, and multiple micropores are evenly distributed on the wall of the spiral pipe 10. The equipment is equipped with a data monitoring system including data acquisition elements and a data collection device. The data acquisition elements are placed in the soil and are all connected to the data acquisition device. The data collection device records and transmits the data to a computer terminal.

[0035] The test chamber 1 is cylindrical in shape and is filled with test blocks and soil to realistically simulate the stress and erosion mechanisms of pipelines in an underground environment. The pressure transmission plate 4 of the test chamber 1 is made of two semi-circular steel plates. The upper cover plate 5 and the lower cover plate 6 are also made of steel plates. The two pressure transmission plates 4 are connected by a mortise and tenon structure, in which the tenon and the groove fit together, allowing them to dynamically fit under external loading forces. This adapts to the change of soil from loose to dense, solving the problem of soil volume shrinkage and separation of the test chamber wall and soil due to continuous external pressure, and ensuring effective transmission of loading forces.

[0036] The sealing system includes a baffle plate 9 and a sealing strip 7. The baffle plate 9 is equipped with an insert plate 8, which is embedded between the tenon and groove of the pressure transmission plate 4. The sealing strip 7 is positioned between the upper cover plate 5, the lower cover plate 6, and the two semi-circular pressure transmission plates 4. The T-shaped baffle plate 9 is used to dynamically fill gaps caused by soil compaction, preventing soil particles from leaking out and improving the long-term sealing performance of the equipment. Meanwhile, flexible sealing strips 7 are provided on the edges of the upper cover plate 5 and the lower cover plate 6 to enhance sealing performance and prevent soil leakage due to changes in the diameter of the cover plates, effectively ensuring the integrity of the test environment.

[0037] The pressure rods 2 are evenly distributed on the pressure transmission plate 4. One end of the pressure rod 2 is connected to the outside of the pressure transmission plate 4, and the other end is fixedly connected to the test frame 3. Multiple pressure rods 2 are arranged on both pressure transmission plates 4, and the same number of rods are used to apply uniform pressure to the pressure plate via hydraulic or mechanical means. This multi-point loading method ensures that the pressure within the test chamber is always evenly distributed during the test, avoiding the concentration of loading force. Similarly, the tenon and mortise structure of the pressure transmission plate 4 remains in contact with the soil as the soil volume changes, ensuring that the loading force is effectively transmitted to the soil interior, simulating the real underground pressure environment.

[0038] The spiral conduit 10 of the corrosive ion implantation system is arranged around the test block. The spiral conduit 10 is made of corrosion-resistant material and has multiple micropores evenly distributed on its wall. Each micropore on the wall of the spiral conduit 10 is equipped with a filter to prevent soil particles from clogging the conduit and causing human error in the experiment. Corrosive ion solution is injected through the spiral conduit 10. The ion solution is evenly released from the micropores into the soil and diffuses to the surface of the test block, simulating the concentration distribution of corrosive ions in the underground environment. The spiral structure of the conduit ensures uniform ion distribution and avoids the problem of localized ion concentration accumulation, thereby ensuring the reliability and authenticity of the experimental results.

[0039] The cylindrical experimental chamber is used to fill the test block and soil. The test block is completely surrounded by soil. The spiral pipe 10 maintains a set distance from the test block to simulate the diffusion path and erosion mechanism of ions in the underground environment.

[0040] The device is equipped with a data monitoring system, including a pressure sensor, a temperature and humidity sensor, a pH meter, and an ion concentration detection device, for real-time monitoring of pressure changes, soil conditions, and ion concentration distribution. The pressure sensor, temperature and humidity sensor, pH meter, and ion concentration detection device are installed in the test chamber 1 and are all connected to the data acquisition device. The data acquisition device records and transmits the data to a computer terminal for analysis of dynamic changes during the test.

[0041] Preferably, but not limited to, the pressure transmission plate 4 and baffle 9 in the simulation device are made of corrosion-resistant materials, such as stainless steel or with a polyethylene protective layer. The main cavity of the test equipment is designed as a detachable structure, which facilitates the cleaning, maintenance and reuse of the equipment, thereby improving the economy and applicability of the test.

[0042] The working method of this invention mainly includes the following steps:

[0043] S1. Place the test block at the designated position inside the cylindrical test chamber 1, and then fill the chamber with soil to ensure that the test block is completely surrounded by soil. At the same time, be careful to maintain a set distance between the spiral pipe 10 and the test block.

[0044] S2. Force is applied to the pressure rod 2 by hydraulic or mechanical means. Since the pressure rod 2 is evenly distributed and one end is connected to the outside of the pressure transmission plate 4 and the other end is fixedly connected to the test frame 3, and the same number of pressure rods 2 are arranged on the two pressure transmission plates 4, the pressure in the test chamber will be evenly distributed by multi-point loading to avoid the concentration of loading force.

[0045] S3. Inject the prepared corrosive ion solution into the spiral pipe 10, so that the solution is evenly released into the soil through the micropores evenly distributed on the pipe wall and diffused to the surface of the test block. The spiral structure of the pipe can ensure the uniform distribution of ions and avoid local accumulation of ion concentration, thus simulating the concentration distribution of corrosive ions in the underground environment.

[0046] S4. Throughout the experiment, the pressure sensor, temperature and humidity sensor, pH meter and ion concentration detector installed in the test chamber 1 will monitor the data of pressure changes, soil conditions and ion concentration distribution in real time, and transmit the monitoring data to the computer terminal through the acquisition device for subsequent processing.

[0047] S5. After the test is completed, analyze the dynamic changes during the test; at the same time, clean, maintain or reuse the equipment. The pressure transmission plate 4 and baffle 9 are made of corrosion-resistant materials, which can better ensure the subsequent performance of the equipment and improve the economy and applicability of the test.

[0048] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A subsurface environment simulation device based on soil pressure and ion erosion, characterized in that, include: Test chamber, loading system, data monitoring system, sealing system, and corrosive ion implantation system; The test chamber consists of two semi-circular pressure transmission plates, an upper cover plate, and a lower cover plate. The two semi-circular pressure transmission plates form a cylindrical structure. The interior of the test chamber is used to fill test blocks and soil. The upper cover plate and the lower cover plate are respectively located at both ends of the semi-circular pressure transmission plates. A test frame is also provided on the outside of the test chamber. The pressure transmission plates of the test chamber are made of two semi-circular steel plates. The upper cover plate and the lower cover plate are also made of steel plates. The two pressure transmission plates are connected by a mortise and tenon structure. The loading system consists of multiple pressure rods, which are positioned between the pressure transmission plate and the test frame. The pressure rods are evenly distributed on the pressure transmission plate, with one end of each pressure rod connected to the outside of the pressure transmission plate and the other end of each pressure rod fixedly connected to the test frame. The sealing system includes a baffle and a sealing strip. The baffle is provided with an insert plate, which is embedded between the tenon and the groove of the pressure transmission plate. The sealing strip is provided between the upper cover plate, the lower cover plate and the two semi-circular pressure transmission plates. The corrosive ion implantation system consists of a spiral tube arranged around the test block. Multiple micropores are evenly distributed on the wall of the spiral tube, and each micropore on the wall of the spiral tube is equipped with a filter device. The data monitoring system includes data acquisition elements and data acquisition devices. The data acquisition elements are placed in the soil and are all connected to the data acquisition devices. The data acquisition devices record and transmit data to a computer terminal.

2. The underground environment simulation device based on soil pressure and ion erosion as described in claim 1, characterized in that, Both pressure transmission plates are equipped with multiple pressure rods of the same number.

3. The underground environment simulation device based on soil pressure and ion erosion as described in claim 2, characterized in that, The spiral pipe is made of corrosion-resistant material and has multiple micropores evenly distributed on the pipe wall. Each micropore on the pipe wall is equipped with a filter device.

4. The underground environment simulation device based on soil pressure and ion erosion as described in claim 3, characterized in that, The spiral pipe maintains a set distance from the test block.

5. The underground environment simulation device based on soil pressure and ion erosion as described in claim 4, characterized in that, The data acquisition components include a pressure sensor, a temperature and humidity sensor, a pH meter, and an ion concentration detection device, which are used to monitor pressure changes, soil conditions, and ion concentration distribution in real time.

6. The underground environment simulation device based on soil pressure and ion erosion as described in claim 5, characterized in that, The pressure transmission plate and baffles in the simulation device are all made of corrosion-resistant materials.

7. The working method of the underground environment simulation device based on soil pressure and ion erosion as described in claim 6, characterized in that, include: S1. Place the test block at the designated position inside the test chamber, and then fill the chamber with soil to ensure that the test block is completely surrounded by soil, while ensuring that the spiral pipe and the test block maintain a set distance. S2. Force is applied to the pressure rod by hydraulic or mechanical means. The same number of pressure rods are arranged on the two pressure transmission plates to make the pressure in the test chamber uniformly distributed by multi-point loading. S3. Inject the prepared corrosive ionic solution into the spiral pipe, so that the solution is evenly released into the soil through the micropores evenly distributed on the pipe wall and diffused to the surface of the test block; S4. Throughout the experiment, the pressure sensor, temperature and humidity sensor, pH meter and ion concentration detection device installed in the test chamber will monitor the pressure changes, soil conditions and ion concentration distribution in real time, and transmit the monitoring data to the computer terminal through the data acquisition device. S5. After the test is completed, analyze the dynamic changes during the test; at the same time, clean, maintain or reuse the device.

Images