A test apparatus and method for deep-earth complex disturbance seepage shear test

Abstract

This application discloses a deep-earth complex disturbance seepage shear test device and method. The shear test device includes a sample assembly, a shear chamber assembly, and a pressure chamber. The sample assembly contains a sample and is used to monitor the impact of various disturbances on the sample in a deep-earth environment. The shear chamber assembly loads the sample assembly and transmits pressure and shear force. The pressure chamber provides pressure and shear force and simulates high-pressure conditions in a deep-earth environment. This application utilizes inlet and outlet water channels in the upper and lower samples to allow high-pressure water from the outside to enter the sample, simulating high permeability pressure in a deep-earth scenario. Simultaneously, the pressure heads within the pressure chamber apply pressure and shear force to the sample, thereby simulating the stress state of soil and rock under the coupling of various factors in a deep-earth environment. This application relates to the field of underground engineering technology.

Description

Technical Field

[0001] This application relates to the field of underground engineering technology, and in particular to a deep-earth complex disturbance seepage shear test device and test method. Background Technology

[0002] Deep underground engineering faces extremely complex environments, often subjected to extreme conditions such as high ground stress, high osmotic pressure, high temperature, and dynamic disturbances. This not only threatens the stability of the rock mass but also poses a severe challenge to engineering safety. Currently, traditional triaxial testing devices struggle to accurately reproduce the stress, seepage, and temperature changes in rock masses under these extreme conditions, resulting in significant limitations in simulating the actual stress state of deep rock strata using existing experimental methods and equipment. Therefore, researching how to accurately simulate the mechanical behavior of deep rock masses, especially the shear seepage process, under the "three highs and one disturbance" environment has become one of the key scientific issues in the field of deep underground engineering. Developing new testing equipment and research methods is crucial not only for providing important theoretical basis for the stability evaluation of deep rock masses but also for the safe and efficient exploitation of deep resources. Summary of the Invention

[0003] The purpose of this application is to at least solve one of the technical problems existing in the prior art, and to provide a deep-earth complex disturbance seepage shear test device and test method, which can simultaneously apply force to the rock and soil sample and create a high-pressure seepage environment, thereby better simulating the stress situation of the rock and soil in the deep underground.

[0004] According to a first aspect of this application, a deep-earth complex disturbance seepage shear test apparatus is provided, comprising:

[0005] The sample assembly includes an upper sample, a lower sample, and a polyurethane layer. The bottom surface of the upper sample is a first joint surface, and the upper sample has a water inlet channel extending to the first joint surface. The top surface of the lower sample is a second joint surface, and the lower sample has a water outlet channel extending to the second joint surface. The top surface of the polyurethane layer is bonded to the first joint surface, and the bottom surface of the polyurethane layer is bonded to the second joint surface.

[0006] A shear box assembly, comprising an upper shear box and a lower shear box, both of which are L-shaped, interlocked and forming a compression space between them, wherein the sample assembly is placed in the compression space;

[0007] The pressure chamber contains a first pressure head, a second pressure head, a third pressure head, and a chamber pressure. The first pressure head abuts against the side of the upper shear box, the second pressure head abuts against the side of the lower shear box, and the third pressure head abuts against the top surface of the upper shear box. The chamber pressure surrounds the shear box assembly. The pressure chamber also has a seepage inlet and a seepage outlet. The seepage inlet is connected to the water inlet channel via a pipe, and the seepage outlet is connected to the water outlet channel via a pipe.

[0008] The first and second pressure heads apply pressure to the shear box assembly to generate shear force on the sample assembly, the third pressure head applies pressure to the upper shear box to generate normal pressure on the sample assembly, the chamber pressure provides circumferential pressure to the shear box assembly, and the seepage inlet can introduce high-pressure water to increase the pressure on the sample assembly.

[0009] According to a first aspect of the present application, the shear box assembly further includes a rubber ring that connects the upper shear box and the lower shear box together, and the upper shear box and the lower shear box are driven to move closer to each other by elastic force.

[0010] According to a first aspect of the present application, the top of the upper shear box is further provided with an upper roller, which makes rolling contact with the third pressure head, and the upper roller is used to reduce the friction between the upper roller and the third pressure head.

[0011] According to a first aspect of the present application, the upper roller is further connected to the upper shear box via a return spring.

[0012] According to a first aspect of the present application, further, a lower roller is installed at the bottom of the lower shear box, the lower roller making rolling contact with the inner wall of the pressure chamber, the lower roller being used to reduce the friction between the roller and the inner wall of the pressure chamber.

[0013] According to a first aspect embodiment of this application, the lower roller is further connected to the lower shear box via a return spring.

[0014] According to a first aspect of the present application, the shear box assembly further includes a connecting rod, the two ends of which are respectively connected to the upper roller and the lower roller.

[0015] According to a first aspect of the present application, the deep-earth complex disturbance seepage shear test device further includes a water pump, a water storage tank, a flow meter, and a wastewater tank. The water pump fills the seepage inlet with water from the water storage tank, and the seepage outlet is connected to the wastewater tank through the flow meter, which is used to detect the seepage flow rate.

[0016] According to a first aspect of the present application, the deep-earth complex disturbance seepage shear test apparatus further includes a control system and a servo system that are electrically connected to each other. The first pressure head, the second pressure head, the third pressure head and the chamber pressure are all electrically connected to the servo system, and the servo system is used to control the pressure of each pressure head.

[0017] According to a second aspect of this application, a test method is provided, based on the above-described deep-earth complex disturbance seepage shear test apparatus, comprising the following steps:

[0018] A water inlet channel is obtained by drilling holes in the upper sample using an electric drill, and a water outlet channel is obtained by drilling holes in the lower sample using an electric drill. Connectors are installed in the water inlet channel and the water outlet channel.

[0019] Polyurethane material is sprayed onto the side of the rock mass between the first joint surface of the upper sample and the second joint surface of the lower sample to obtain a polyurethane layer that completely seals the first joint surface and the second joint surface.

[0020] The prepared sample assembly is placed between the upper shear box and the lower shear box;

[0021] The shear box assembly, together with the sample assembly, is placed in the pressure chamber;

[0022] A connector for connecting the pipe extending from the seepage inlet to the water inlet channel, and a connector for connecting the pipe extending from the seepage outlet to the water outlet channel;

[0023] Seal the pressure chamber and inject oil into the pressure chamber to seal the sample;

[0024] The first pressure head, the second pressure head, and the third pressure head are activated to apply pressure to the shear box assembly;

[0025] Start the external water supply equipment to increase the water pressure inside the sample assembly;

[0026] Begin the experiment and record the data;

[0027] Export the data and analyze the results; the experiment is now complete.

[0028] The beneficial effects of the embodiments of this application include at least the following: by opening water inlet channels and water outlet channels in the upper and lower samples, the high-pressure water from the outside can enter the interior of the sample to simulate the high permeability pressure in deep-earth scenarios. At the same time, each pressure head in the pressure chamber can apply pressure and shear force to the sample, thereby simulating the stress situation of the rock and soil mass after being coupled by various factors in deep-earth scenarios. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this application, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0030] Figure 1 This is a three-dimensional view of the upper specimen 110 and the lower specimen 120 in the deep complex disturbance seepage shear test apparatus according to the first aspect of this application;

[0031] Figure 2 This is a three-dimensional view of the sample assembly 100 in the deep complex disturbance seepage shear test apparatus according to the first aspect of this application;

[0032] Figure 3 This is a cross-sectional view of the shear box assembly 200 and the pressure chamber 300 in the deep complex disturbance seepage shear test apparatus according to the first aspect of this application;

[0033] Figure 4 This is a schematic diagram of the connection of the deep complex disturbance seepage shear test apparatus according to the first aspect of this application.

[0034] Reference numerals: 100-Sample assembly, 110-Upper sample, 111-Water inlet channel, 120-Lower sample, 121-Water outlet channel, 130-Polyurethane layer, 200-Shear box assembly, 210-Upper shear box, 220-Lower shear box, 230-Rubber ring, 240-Upper roller, 250-Lower roller, 260-Reset spring, 270-Connecting rod, 300-Pressure chamber, 310-First pressure head, 320-Second pressure head, 330-Third pressure head, 340-Seepage inlet, 350-Seepage outlet. Detailed Implementation

[0035] This section will describe in detail the specific embodiments of this application. Preferred embodiments of this application are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of this application, but they should not be construed as limiting the scope of protection of this application.

[0036] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0038] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0039] Currently, traditional triaxial testing equipment struggles to accurately reproduce the stress, seepage, and temperature changes in rock masses under these extreme conditions, resulting in significant limitations in simulating the actual stress state of deep rock strata using existing experimental methods and equipment. Therefore, researching how to accurately simulate the mechanical behavior of deep rock masses, particularly the shear seepage process, under conditions of "high temperature, high humidity, high temperature, and high temperature disturbance," has become one of the key scientific issues in the field of deep underground engineering.

[0040] In response, this application proposes a deep-earth complex disturbance seepage shear test device and test method. By opening water inlet channel 111 and water outlet channel 121 in the upper sample 110 and the lower sample 120, high-pressure water from the outside can enter into the sample to simulate the high permeability pressure under deep-earth conditions. At the same time, each pressure head in the pressure chamber 300 can apply pressure and shear force to the sample, thereby simulating the stress situation of the rock and soil under the coupling of various factors in deep-earth conditions.

[0041] The deep-earth complex disturbance seepage shear test apparatus in the first aspect of this application includes a sample assembly 100, a shear box assembly 200, and a pressure chamber 300. The sample assembly 100 contains a sample and is used to detect the effects of multiple disturbances on the sample in a deep-earth environment. The shear box assembly 200 is used to load the sample assembly 100 and transmit pressure and shear force. The pressure chamber 300 is used to provide pressure and shear force and simulate high-pressure conditions in a deep-earth environment.

[0042] Specifically, refer to Figure 1 and Figure 2The sample assembly 100 includes an upper sample 110, a lower sample 120, and a polyurethane layer 130. The bottom surface of the upper sample 110 is a first joint surface, and the upper sample 110 has a water inlet channel 111 extending to the first joint surface. The top surface of the lower sample 120 is a second joint surface, and the lower sample 120 has a water outlet channel 121 extending to the second joint surface. The top surface of the polyurethane layer 130 is bonded to the first joint surface, and the bottom surface of the polyurethane layer 130 is bonded to the second joint surface, thereby bonding the upper sample 110, the lower sample 120, and the polyurethane layer 130 into a single unit.

[0043] Reference Figure 3 The shear box assembly 200 includes an upper shear box 210 and a lower shear box 220. Both the upper shear box 210 and the lower shear box 220 are L-shaped and are interlocked to form a compression space between them, in which the sample assembly 100 is placed. Therefore, when pressure is applied to the upper shear box 210 and the lower shear box 220 respectively, both pressure and shear force can be applied to the sample assembly 100, thereby simulating the complex mechanical environment of deep-earth environments.

[0044] The pressure chamber 300 is equipped with a first pressure head 310, a second pressure head 320, a third pressure head 330, and chamber pressure. The first pressure head 310 abuts against the side of the upper shear box 210, the second pressure head 320 abuts against the side of the lower shear box 220, and the third pressure head 330 abuts against the top surface of the upper shear box 210. The chamber pressure surrounds the shear box assembly 200. Each pressure head can apply pressure to different sides of the sample assembly 100, and the chamber pressure can provide circumferential pressure to the shear box assembly. The pressure chamber 300 also has a seepage inlet 340 and a seepage outlet 350. The seepage inlet 340 is connected to the water inlet channel 111 through a pipe, and the seepage outlet 350 is connected to the water outlet channel 121 through a pipe.

[0045] The first pressure head 310 and the second pressure head 320 apply pressure to the shear box assembly 200 to generate shear force on the sample assembly 100, and the third pressure head 330 applies pressure to the upper shear box 210 to generate normal pressure on the sample assembly 100. The seepage inlet 340 can introduce high-pressure water to increase the pressure on the sample assembly 100, thereby simulating the coupled scenario of multiple conditions such as pressure, shear force and high osmotic pressure, and improving the simulation degree of deep earth environment.

[0046] Furthermore, the shear box assembly 200 also includes a rubber ring 230, which connects the upper shear box 210 and the lower shear box 220 together. The rubber ring 230 drives the upper shear box 210 and the lower shear box 220 to move closer to each other through elastic force, thereby preventing the upper shear box 210 and the lower shear box 220 from separating and loosening. The sample assembly 100 can be placed more stably between the upper shear box 210 and the lower shear box 220.

[0047] Furthermore, an upper roller 240 is mounted on the top of the upper shear box 210. The upper roller 240 makes rolling contact with the third pressure head 330. The upper roller 240 is used to reduce the friction between the upper roller 240 and the third pressure head 330, thereby reducing the scraping between the third pressure head 330 and the upper shear box 210 when the shear box assembly 200 is driven by the first pressure head 310 or the second pressure head 320 and undergoes lateral displacement.

[0048] Furthermore, the upper roller 240 is connected to the upper shear box 210 via a return spring 260 to prevent the upper roller 240 and the upper shear box 210 from separating from each other.

[0049] Furthermore, a lower roller 250 is installed at the bottom of the lower shear box 220. The lower roller 250 makes rolling contact with the inner wall of the pressure chamber 300. The lower roller 250 is used to reduce the friction between the lower shear box 220 and the inner wall of the pressure chamber 300, thereby reducing the scraping between the lower shear box 220 and the inner wall of the pressure chamber 300 when the shear box assembly 200 is driven by the first pressure head 310 or the second pressure head 320 and undergoes lateral displacement.

[0050] Furthermore, the lower roller 250 is connected to the lower shear box 220 via a return spring 260 to prevent the lower roller 250 and the lower shear box 220 from separating from each other.

[0051] Furthermore, the shear box assembly 200 also includes a connecting rod 270, the two ends of which are connected to the upper roller 240 and the lower roller 250 respectively, to maintain the relative position of the upper roller 240 and the lower roller 250, thereby preventing the direction of the force from shifting due to the misalignment of the upper roller 240 and the lower roller 250 when the third pressure head 330 applies pressure.

[0052] Reference Figure 4 The deep-ground complex disturbance seepage shear test apparatus also includes a water pump, a water storage tank, a flow meter, and a wastewater tank. The water pump fills the seepage inlet 340 with water from the water storage tank, and the seepage outlet 350 is connected to the wastewater tank via a flow meter, which is used to detect the seepage flow rate.

[0053] Furthermore, the deep-ground complex disturbance seepage shear test device also includes a control system and a servo system that are electrically connected to each other. The first pressure head 310, the second pressure head 320, the third pressure head 330 and the chamber pressure are all electrically connected to the servo system, which is used to control the pressure of each pressure head.

[0054] A test method according to a second aspect embodiment of this application, based on the above-described deep-earth complex disturbance seepage shear test device, includes the following steps:

[0055] S100. Use an electric drill to drill holes in the upper sample 110 to obtain a water inlet channel 111, use an electric drill to drill holes in the lower sample 120 to obtain a water outlet channel 121, and install connectors in the water inlet channel 111 and the water outlet channel 121.

[0056] S200. Polyurethane material is sprayed onto the side of the rock mass between the first joint surface of the upper sample 110 and the second joint surface of the lower sample 120 to obtain a polyurethane layer 130 that completely seals the first and second joint surfaces.

[0057] S300. Place the prepared sample assembly 100 between the upper shear box 210 and the lower shear box 220;

[0058] S400. Place the shear box assembly 200 together with the sample assembly 100 in the pressure chamber 300;

[0059] S500. A connector for connecting the pipe extending from the seepage inlet 340 to the water inlet channel 111, and a connector for connecting the pipe extending from the seepage outlet 350 to the water outlet channel 121.

[0060] S600. Seal the pressure chamber 300 and inject oil into the pressure chamber 300 to seal the sample;

[0061] S700. Activate the first pressure head 310, the second pressure head 320 and the third pressure head 330 to apply pressure to the shear box assembly 200;

[0062] S800. Start the external water supply equipment to increase the water pressure inside the sample assembly 100;

[0063] S900. Begin the experiment and record the data;

[0064] S1000. Export the data and analyze the results. The experiment ends.

[0065] The above is a detailed description of the preferred embodiments of this application. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A deep-earth complex disturbance seepage shear test device, characterized in that, include: The sample assembly includes an upper sample, a lower sample, and a polyurethane layer. The bottom surface of the upper sample is a first joint surface, and the upper sample has a water inlet channel extending to the first joint surface. The top surface of the lower sample is a second joint surface, and the lower sample has a water outlet channel extending to the second joint surface. The top surface of the polyurethane layer is bonded to the first joint surface, and the bottom surface of the polyurethane layer is bonded to the second joint surface. A shear box assembly, comprising an upper shear box and a lower shear box, both of which are L-shaped, interlocked and forming a compression space between them, wherein the sample assembly is placed in the compression space; The pressure chamber contains a first pressure head, a second pressure head, a third pressure head, and a chamber pressure. The first pressure head abuts against the side of the upper shear box, the second pressure head abuts against the side of the lower shear box, and the third pressure head abuts against the top surface of the upper shear box. The chamber pressure surrounds the shear box assembly. The pressure chamber also has a seepage inlet and a seepage outlet. The seepage inlet is connected to the water inlet channel via a pipe, and the seepage outlet is connected to the water outlet channel via a pipe. The first and second pressure heads apply pressure to the shear box assembly to generate shear force on the sample assembly, the third pressure head applies pressure to the upper shear box to generate normal pressure on the sample assembly, the chamber pressure provides circumferential pressure to the shear box assembly, and the seepage inlet can introduce high-pressure water to increase the pressure on the sample assembly.

2. The deep-earth complex disturbance seepage shear test device according to claim 1, characterized in that: The shear box assembly also includes a rubber ring that connects the upper shear box and the lower shear box together, and the upper shear box and the lower shear box are driven to move closer to each other by elastic force.

3. The deep-earth complex disturbance seepage shear test device according to claim 1, characterized in that: An upper roller is mounted on the top of the upper shear box. The upper roller makes rolling contact with the third pressure head. The upper roller is used to reduce the friction between the upper roller and the third pressure head.

4. The deep-earth complex disturbance seepage shear test device according to claim 3, characterized in that: The upper roller is connected to the upper shear box via a return spring.

5. The deep-earth complex disturbance seepage shear test device according to claim 3, characterized in that: The bottom of the lower shear box is equipped with a lower roller, which makes rolling contact with the inner wall of the pressure chamber. The lower roller is used to reduce the friction between the roller and the inner wall of the pressure chamber.

6. The deep-earth complex disturbance seepage shear test apparatus according to claim 5, characterized in that: The lower roller is connected to the lower shear box via a return spring.

7. The deep-earth complex disturbance seepage shear test device according to claim 5, characterized in that: The shear box assembly also includes a connecting rod, the two ends of which are respectively connected to the upper roller and the lower roller.

8. The deep-earth complex disturbance seepage shear test device according to claim 1, characterized in that: The deep-earth complex disturbance seepage shear test device also includes a water pump, a water storage tank, a flow meter, and a wastewater tank. The water pump fills the seepage inlet with water from the water storage tank, and the seepage outlet is connected to the wastewater tank through the flow meter, which is used to detect the seepage flow rate.

9. The deep-earth complex disturbance seepage shear test apparatus according to claim 1, characterized in that: The deep-earth complex disturbance seepage shear test device also includes a control system and a servo system that are electrically connected to each other. The first pressure head, the second pressure head, the third pressure head and the chamber pressure are all electrically connected to the servo system, which is used to control the pressure of each pressure head.

10. A test method, based on the deep-earth complex disturbance seepage shear test apparatus according to any one of claims 1 to 9, Its features are, include: A water inlet channel is obtained by drilling holes in the upper sample using an electric drill, and a water outlet channel is obtained by drilling holes in the lower sample using an electric drill. Connectors are installed in the water inlet channel and the water outlet channel. Polyurethane material is sprayed onto the side of the rock mass between the first joint surface of the upper sample and the second joint surface of the lower sample to obtain a polyurethane layer that completely seals the first joint surface and the second joint surface. The prepared sample assembly is placed between the upper shear box and the lower shear box; The shear box assembly, together with the sample assembly, is placed in the pressure chamber; A connector for connecting the pipe extending from the seepage inlet to the water inlet channel, and a connector for connecting the pipe extending from the seepage outlet to the water outlet channel; Seal the pressure chamber and inject oil into the pressure chamber to seal the sample; The first pressure head, the second pressure head, the third pressure head, and the chamber pressure are activated to apply pressure to the shear box assembly; Start the external water supply equipment to increase the water pressure inside the sample assembly; Begin the experiment and record the data; Export the data and analyze the results; the experiment is now complete.

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