Sample preparation device for rock and soil sample

Abstract

The utility model relates to the technical field of rock-soil indoor test sample preparation, in particular to a rock-soil sample preparation device. The sample preparation device of the rock-soil sample comprises a force transmission structure, a sample mold, a first fixing structure and a second fixing structure, the sample mold is provided with a cavity used for containing the rock-soil sample, the outer side wall of the force transmission structure is provided with a plurality of grooves, the extending direction of the grooves is the same as the axial direction of the force transmission structure, and the first fixing structure is provided with a penetrating opening; when the sample preparation device is in an assembled state, the sample mold is located between the first fixing structure and the second fixing structure, the force transmission structure is matched with the guide edges through the grooves, and the sample mold is located between the first fixing structure and the second fixing structure. And the force transmission structure extends into the cavity of the sample mold through the through opening. The rock-soil sample preparation device provided by the utility model can control the falling angle and force of the force transmission structure to obtain the rock-soil sample with a flat inclined plane.

Description

Technical Field

[0001] This disclosure relates to the field of sample preparation technology for indoor geotechnical testing, and in particular to a sample preparation device for geotechnical samples. Background Technology

[0002] Stratification of soil and rock masses is a common phenomenon in nature, widely observed in slope engineering, tunnel engineering, mining engineering, and other projects. Soil and rock masses are prone to failure at the interfaces between these layers, especially when encountering weak interlayers, which can easily lead to engineering accidents such as collapses and landslides. Experimental research on stratified soil and rock masses is an important area of ​​research in geotechnical engineering. Its purpose is to gain a deeper understanding of the physical, mechanical, and engineering properties of stratified soil masses, providing reliable scientific and technical support for various engineering construction projects.

[0003] In the field of layered soil and rock mass testing, inclined layered soil and rock samples can more accurately simulate the stress state and deformation characteristics of soil and rock in actual engineering, providing a more reliable basis for engineering design and construction.

[0004] In related technologies, cylindrical metal inclined plane hammers are used to prepare cylindrical soil samples when preparing soil samples at a certain angle. However, when preparing soil samples with metal inclined plane hammers, it is difficult to control the force and angle of each hammer strike because both the soil sample and the hammer are cylindrical, resulting in samples with uneven inclined surfaces and uneven compaction. Utility Model Content

[0005] This disclosure is made in view of the above-mentioned problems. This disclosure provides a sample preparation apparatus for soil and rock specimens, which can control the falling angle of the force transmission structure to obtain soil and rock specimens with flat inclined surfaces.

[0006] According to one aspect of this disclosure, a sample preparation apparatus for a soil and rock sample is provided, comprising: a force transmission structure, a sample mold, and a first fixing structure and a second fixing structure for fixing the sample mold, the force transmission structure having opposing first and second surfaces, the first surface being a plane and the second surface being an inclined plane, and the sample mold having a cavity for accommodating the soil and rock sample.

[0007] The outer wall of the force transmission structure has multiple grooves, the extension direction of the grooves is the same as the axial direction of the force transmission structure, the first fixing structure has a through opening, the inner wall of the first fixing structure located at the through opening has multiple guide ridges that cooperate with the grooves, and the inner diameter of the sample mold is the same as the diameter of the through opening.

[0008] When the sample preparation device is in the assembled state, the sample mold is located between the first fixed structure and the second fixed structure. The force transmission structure cooperates with the guide ridge through the groove. The force transmission structure extends into the cavity of the sample mold through the through opening.

[0009] In the technical solution provided in this embodiment, firstly, the sample mold can be fixed between the first and second fixed structures, and sample material is added to the sample mold. Then, after the groove of the force transmission structure is matched with the guide ridge of the first fixed structure, the force transmission structure falls along the guide ridge through the through opening of the first fixed structure until the force transmission structure extends into the cavity of the sample mold. At this time, an external force is applied to the first surface of the force transmission structure until the compaction of the sample material reaches a preset compaction degree, and the soil sample of that layer can be obtained. The entire soil sample is obtained in the same way. Since the inner diameter of the sample mold is the same as the diameter of the through opening, the angle of the force transmission structure falling each time can be controlled by the matching of the groove of the force transmission structure and the guide ridge of the first fixed structure, thereby effectively preventing the change of the inclined surface caused by the rotation of the force transmission structure during falling, so that the inclined surface of the finally obtained soil sample is flatter. When making multi-layered soil samples with the same inclination angle, the parallelism of the inclined surfaces of the multi-layered soil samples can be effectively ensured, and the layered soil samples can be compacted more uniformly. Attached Figure Description

[0010] The above and other objects, features, and advantages of this disclosure will become more apparent from the more detailed description of the embodiments thereof in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the disclosure and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0011] Figure 1 This is an exploded structural diagram of the soil and rock sample preparation device according to an embodiment of the present disclosure;

[0012] Figure 2 This is a schematic diagram of the assembly state of the soil and rock sample preparation device according to an embodiment of this disclosure;

[0013] Figure 3 This is a schematic diagram of the structure of the flat gasket according to an embodiment of the present disclosure;

[0014] Figure 4 This is a schematic diagram of the structure of the gasket adsorption component according to an embodiment of the present disclosure;

[0015] Figure 5 This is a schematic diagram of the structure of an intermediate layer of a sample according to an embodiment of this disclosure.

[0016] Figure label:

[0017] 100-Force transmission structure, 100a-First surface, 100b-Second surface, 110-Groove, 200-Sample mold, 210-Three-lobed mold, 220-Reinforcing ring, 300-First fixing structure, 310-Through opening, 320-Guide ridge, 400-Second fixing structure, 410-Non-through opening, 500-Support rod, 600-Diameter reduction auxiliary component, 700-Flattening gasket, 800-Gasket adsorption component. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects to be solved by this disclosure clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0019] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise expressly and specifically defined. "Several" means one or more, unless otherwise expressly and specifically defined.

[0021] In the description of this disclosure, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0022] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0023] Layering of soil and rock masses is a common phenomenon in nature, widely observed in slope engineering, tunnel engineering, mining engineering, and other projects. Soil and rock masses are prone to failure at the interfaces between layers, especially when encountering weak interlayers, which can easily lead to engineering accidents such as collapses and landslides. Experimental research on layered soil and rock masses is an important area of ​​research in geotechnical engineering. Its purpose is to gain a deeper understanding of the physical, mechanical, and engineering properties of layered soil masses, providing reliable scientific and technical support for various engineering constructions. In the field of experimental research on layered soil and rock masses, inclined layered soil and rock samples can more accurately simulate the stress state and deformation characteristics of soil and rock in actual engineering projects, providing a more reliable basis for engineering design and construction.

[0024] However, due to the difficulty in sample preparation, current indoor tests in geotechnical mechanics mainly focus on mechanical tests of soil samples from the same layer. There are relatively few studies on indoor tests of soil samples from layered soil samples, and even fewer studies on the mechanical properties of soil samples with a certain inclination angle.

[0025] In related technologies, cylindrical metal inclined plane hammers are used to prepare cylindrical soil samples when preparing soil samples at a certain angle. However, when preparing soil samples with metal inclined plane hammers, it is difficult to control the force and angle of each hammer strike because both the soil sample and the hammer are cylindrical, resulting in samples with uneven inclined surfaces and uneven compaction.

[0026] To address the aforementioned problems, this disclosure provides a sample preparation device for soil and rock specimens, which can obtain soil and rock specimens with flat inclined surfaces and uniform compaction. This solves the problem in the prior art where it is difficult to control the angle and force of each strike of the hammer rod, leading to specimens with uneven inclined surfaces and uneven compaction.

[0027] Figure 1 An exploded structural schematic diagram of the soil and rock sample preparation apparatus according to an embodiment of the present disclosure is shown. Figure 2 A schematic diagram of the assembled state of the soil and rock sample preparation apparatus according to an embodiment of this disclosure is shown. Figure 1 and Figure 2 As shown, the soil and rock sample preparation apparatus of this embodiment includes: a force transmission structure 100, a sample mold 200, and a first fixing structure 300 and a second fixing structure 400 for fixing the sample mold 200. The force transmission structure 100 has a first surface 100a and a second surface 100b opposite to each other. The first surface 100a is a plane, and the second surface 100b is an inclined plane. The sample mold 200 has a cavity for accommodating the soil and rock sample. It should be understood that the shape of the force transmission structure 100 can be cylindrical, the first surface 100a can be an upper surface, and the second surface 100b can be a lower surface. The first fixing structure 300 and the second fixing structure 400 can be plate-shaped.

[0028] like Figure 1 As shown, the outer wall of the force transmission structure 100 has a plurality of grooves 110, the extension direction of the grooves 110 is the same as the axial direction of the force transmission structure 100, the first fixing structure 300 has a through opening 310, the inner wall of the first fixing structure 300 located in the through opening 310 has a plurality of guide ridges 320 that cooperate with the grooves 110, and the inner diameter of the sample mold 200 is the same as the diameter of the through opening 310.

[0029] Understandably, since the second surface 100b of the force transmission structure 100 is an inclined plane, the multiple grooves 110 are of unequal length. The length of each groove 110 is the same as the axial length of the outer wall of the force transmission structure 100, so that the guide ribs 320 can be engaged in the grooves 110 before the force transmission structure 100 is inserted into the sample mold through the through opening 310. The multiple guide ribs 320 can be arranged on two non-diagonal axes of symmetry of the first fixing structure 300.

[0030] When the above-mentioned sample preparation device is in the assembled state, the sample mold 200 is located between the first fixed structure 300 and the second fixed structure 400. The force transmission structure 100 cooperates with the guide rib 320 through the groove 110, and the force transmission structure 100 extends into the cavity of the sample mold 200 through the through opening 310. The second surface 100b of the force transmission structure 100 is located in the cavity of the sample mold 200.

[0031] In practice, firstly, the sample mold 200 can be fixed between the first fixing structure 300 and the second fixing structure 400, and sample material is added into the sample mold 200. Then, after the groove 110 of the force transmission structure 100 is properly engaged with the guide rib 320 of the first fixing structure 300, the force transmission structure 100 falls along the guide rib 320 through the through opening 310 of the first fixing structure 300 until the force transmission structure 100 extends into the cavity of the sample mold 200. At this time, an external force is applied to the first surface 100a of the force transmission structure 100 until the compactness of the sample material reaches a preset compactness, thus obtaining a soil and rock sample. It should be understood that this preset compactness can be defined as the target compactness to be achieved by the soil and rock sample.

[0032] Based on this, with the cooperation of the groove 110 of the force transmission structure 100 and the guide rib 320 of the first fixing structure 300, the angle of each fall of the force transmission structure 100 can be controlled, thereby effectively preventing changes in the inclined surface caused by the rotation of the force transmission structure 100 during fall, resulting in a smoother inclined surface of the final soil and rock sample. When preparing multi-layered soil and rock samples with the same inclined angle, the parallelism of the inclined surfaces of the multi-layered soil and rock samples can be effectively ensured, further enabling the layered soil and rock samples to be compacted more uniformly. In addition, since the inner diameter of the sample mold 200 is the same as the diameter of the through opening 310, the force transmission structure 100 can fit tightly with the sample mold 200 after entering the sample mold 200, further enabling the force transmission structure 100 to contact the cross-section of the sample material as much as possible when applying external force to the sample material, resulting in a higher degree of flatness of the inclined surface of the final soil and rock sample.

[0033] It is understood that the above-mentioned soil and rock samples can be layered samples, and the number of layers of the layered sample can be multiple, such as two, three, four, five... ten or more layers. There is no limitation here, and the specific number can be set according to the actual situation.

[0034] For example, the above-mentioned soil and rock samples include soil samples and rock samples. Regardless of whether the soil and rock sample is a soil sample or a rock sample, it can be made into a planar soil and rock sample or a layered soil and rock sample as needed. If the soil and rock sample is a soil sample, the size of the soil sample can include a soil sample with a diameter of 39.1 mm, 61.8 mm, or 101 mm. If the soil and rock sample is a rock sample, the size of the rock sample can include a rock sample with a diameter of 50 mm.

[0035] When the diameter of the soil sample is 39.1 mm, its height can be 80 mm. When the diameter of the soil sample is 61.8 mm, its height can be 125 mm. When the diameter of the soil sample is 101 mm, its height can be 200 mm. When the diameter of the rock sample is 50 mm, its height can be 100 mm.

[0036] In one example, the dimensions of the groove 110 in this embodiment match the dimensions of the guide ridge 320. For example, the guide ridge 320 may be 3mm long, 3mm wide, and have a height equal to the thickness of the first fixing structure 300. The groove 110 may be 3.5mm long and 3.5mm wide.

[0037] For example, the exposed edge of the guide rib 320 can be chamfered to make it easier for the groove 110 of the force transmission structure 100 to slide when it engages with the guide rib 320.

[0038] In one possible implementation, the sample preparation apparatus of this disclosure embodiment further includes a plurality of support rods 500 located between the first fixing structure 300 and the second fixing structure 400. Each support rod 500 has a first end and a second end. The first end of each support rod 500 is threadedly connected to the first fixing structure 300, and the second end of each support rod 500 is threadedly connected to the second fixing structure 400. The first end of each support rod 500 extends out of the upper surface of the first fixing structure 300.

[0039] In practice, multiple support rods 500 can be threadedly connected to the first fixed structure 300 and the second fixed structure 400 to support the first fixed structure 300 and the second fixed structure 400, thereby fixing the sample mold 200 between the first fixed structure 300 and the second fixed structure 400.

[0040] Based on this, when it is necessary to adjust the distance between the first fixed structure 300 and the second fixed structure 400, the height between the support rod 500 and the first fixed structure 300 and the second fixed structure 400 can be adjusted by using the thread on the first end of the support rod 500 until the height of the sample mold 200 between the first fixed structure 300 and the second fixed structure 400 is the same as the height of each support rod 500 between the first fixed structure 300 and the second fixed structure 400.

[0041] For example, both ends of the support rod 500 are threaded. The length of the thread at the second end is the same as the thickness of the second fixing structure 400. The diameter of the thread at the second end is 2mm smaller than the diameter of the support rod 500. During installation, a washer is placed on the upper end of the thread. The length of the thread at the first end is the thickness of the first fixing structure + 15mm, that is, the length of the first end of the support rod 500 extending out of the upper surface of the first fixing structure 300 is 15mm. During installation, a nut is installed on the upper end of the thread for fixing.

[0042] Under the action of the aforementioned support rod 500, the sample mold 200 can be clamped between the first fixed structure 300 and the second fixed structure 400, which facilitates subsequent sample preparation.

[0043] In one possible implementation, the second fixing structure 400 of this disclosure embodiment has a non-through opening 410 for fixing the sample mold 200. When the diameter of the sample mold 200 is a preset diameter, the non-through opening 410 cooperates with the bottom of the sample mold 200.

[0044] For example, to make the soil and rock sample preparation apparatus of this disclosure applicable to the preparation of samples of different diameters, a non-penetrating opening 410 can be made on the second fixing structure 400. The diameter of the non-penetrating opening 410 is set according to the preset diameter of the sample mold 200. It should be understood that the preset diameter of the sample mold 200 can be defined as the outer diameter of the sample mold required for the largest size sample. That is: the diameter of the largest diameter specimen + the wall thickness of the sample mold 200. In order to facilitate the removal or placement of the sample mold, the preset diameter of the sample mold 200 can be set to the diameter of the largest diameter specimen + the wall thickness of the sample mold 200 + (1mm to 2mm). The specific amount of addition can be set according to the actual situation. The purpose is to fix the sample mold while making it easy to remove the sample mold.

[0045] In one example, the size of the sample mold in this embodiment of the present disclosure is determined by the size of the target sample. For example, if the target sample is a soil sample with a diameter of 39.1 mm and a height of 80 mm, then the diameter of the sample mold 200 is: inner diameter 39.1 mm + wall thickness of the sample mold 200. If the target sample is a rock sample with a diameter of 50 mm and a height of 100 mm, then the diameter of the sample mold 200 is: inner diameter 50 mm + wall thickness of the sample mold 200.

[0046] In practice, before use, the bottom of the sample mold 200 can be placed into the non-penetrating opening 410 so that the sample mold 200 is fixed to the non-penetrating opening 410 of the second fixing structure 400.

[0047] In one example, when the diameter of the sample mold 200 is smaller than a preset diameter, the sample preparation apparatus further includes a diameter reduction auxiliary member 600, which is located within the non-through opening 410 and has an opening that mates with the bottom of the sample mold 200. It should be understood that the diameter reduction auxiliary member 600 may include an annulus.

[0048] In practice, the required diameter reduction auxiliary part 600 can be determined according to the diameter of the sample mold 200. The suitable diameter reduction auxiliary part 600 is placed into the non-through opening 410, and then the sample mold 200 is placed into the opening of the diameter reduction auxiliary part 600.

[0049] In one possible implementation, if the soil sample in this embodiment of the present disclosure is a soil sample, the sample preparation device further includes a compaction mechanism, which is located above the first surface of the force transmission structure 100 when the sample preparation device is in the assembled state. If the soil sample is a rock sample, the sample preparation device further includes a compaction mechanism, which is located above the first surface of the force transmission structure 100 when the sample preparation device is in the assembled state.

[0050] In practice, when the soil sample is a soil sample, after assembling the sample apparatus, the soil sample is placed in the sample mold 200. Then, the first surface of the force transmission structure 100 is struck using a compaction mechanism until the compaction degree of the soil sample reaches the preset compaction degree, thus obtaining a soil sample. When the soil sample is a rock sample, after assembling the sample apparatus, the rock sample is placed in the sample mold 200. Then, the first surface of the force transmission structure 100 is pressed using a compaction mechanism until the compaction degree of the rock sample reaches the preset compaction degree, thus obtaining a rock sample.

[0051] In one possible implementation, the sample preparation apparatus of this disclosure embodiment further includes a flattening pad 700. Figure 3 A schematic diagram of the structure of a flat gasket according to an embodiment of this disclosure is shown. Figure 3 As shown, the flat shim 700 has the same inclination direction as the second surface, and the outer wall of the flat shim 700 is in contact with the inner wall of the sample mold 200. When the sample preparation device is in the assembled state, the flat shim 700 is located between the second surface and the soil sample.

[0052] In practice, after placing a soil or rock sample into the sample mold 200, the sample inside the mold is first initially leveled using a force transmission mechanism, and then the force transmission mechanism is removed. Next, a flat shim 700 with the same inclination direction as the inclined surface of the first fixing structure 300 is placed above the soil or rock sample. Then, the force transmission structure 100 is placed above the flat shim, and an external force is applied to the force transmission structure 100 using a compaction mechanism or a pressing mechanism. Because the flat shim 700 has the same inclination direction as the inclined surface of the first fixing structure 300, and because it avoids the problem of unevenness caused by applying external force to the groove position of the force transmission structure 100 when it directly contacts the sample, a soil or rock sample with better inclined surface flatness can be obtained.

[0053] In order to facilitate the placement of the flat shim 700 into the layered rock and soil with inclined surfaces in the sample mold 200, the flat shim 700 can be placed into the sample mold 200 by avoiding the guide ridge 320 on the first fixing structure 300.

[0054] The inclination of the second surface of the aforementioned force transmission structure 100 is an acute angle, which can be determined according to actual needs. The position of the groove on the second inclined surface affects whether the flat pad can be easily placed into the sample mold 200. For example, when there are 4 grooves and the 4 grooves are evenly distributed around the circumference of the force transmission structure 100, when the axis of symmetry of the elliptical inclined surface of the second surface has a certain angle with the diagonal of the quadrilateral formed by the connection of the 4 grooves, for example, 15° to 75°, it is convenient for the flat pad 700 to avoid the guide edge 320 on the first fixing structure 300 and be placed into the layered rock and soil layer with the inclined surface in the sample mold 200.

[0055] For example, the sample preparation apparatus of this disclosure embodiment further includes a gasket adsorption member 800. Figure 4 A schematic diagram of the structure of the gasket adsorption member according to an embodiment of the present disclosure is shown. Figure 4 As shown, the pad adsorption component 800 is used to remove the flat pad 700 after each layer of soil and rock sample preparation is completed in the sample preparation device.

[0056] For example, the material of the flat pad 700 can be metal, and the thickness can be 5mm. The pad adsorption component 800 can be a magnet. The magnet has a hook on the upper surface and a flat surface on the lower surface. A thin rope can be tied to the hook.

[0057] In one example, regardless of whether the soil or rock sample is a soil sample or a rock sample, the soil or rock layer with different inclination angles and inclination directions on the upper and lower surfaces can be made by adjusting the inclination angle and inclination direction of the second surface of the force transmission structure 100. For example, the upper or lower surface of the middle layer of the sample can be a sample layer with one side inclination, or it can be a sample layer with both the upper and lower surfaces inclination. When both the upper and lower surfaces are inclination, the inclination direction and inclination angle of the upper and lower surfaces can be different. Figure 5 A schematic diagram of the structure of a sample intermediate layer according to an embodiment of the present disclosure is shown, as follows: Figure 5 As shown, the upper and lower surfaces of the middle layer of the sample are both inclined surfaces, and the inclination direction and inclination angle of the upper and lower surfaces are different.

[0058] In practice, after the first layer of the sample with an inclined upper surface is prepared, and the material of the middle layer of the sample is added, the tilt direction of the flat shim 700 and the tilt angle and tilt direction of the second surface of the force transmission structure 100 can be adjusted to obtain the following: Figure 5 The middle layer of the sample shown.

[0059] For example, such as Figure 1 and Figure 2 As shown, the sample mold 200 of this embodiment includes a three-lobed mold 210 and a reinforcing ring 220. When the sample preparation device is in the assembled state, the reinforcing ring 220 is sleeved on the outer wall of the three-lobed mold 210.

[0060] In one possible implementation, the height of the second surface 100b of the force transmission structure 100 of this disclosure embodiment can be set to facilitate handling without affecting the compaction and tamping of the first surface 100a.

[0061] In one example, the first fixing structure 300, the second fixing structure 400, and the sample mold 200 can be made of stainless steel or other metal materials. The force transmission structure 100 can be made of photosensitive numerical material by 3D printing, or cut from acrylic material, or, to save costs, can be made of hardwood that is not easily deformed.

[0062] Example

[0063] The method for preparing the specimen according to this invention is as follows:

[0064] 1. Apply release agent to the φ50mm×100mm three-part mold, assemble and tighten the reinforcing ring. Place the bottom of the assembled and reinforced three-part mold into the non-penetrating opening of the second fixing structure. Screw the support rod onto the second fixing structure and insert the first fixing structure through the support rod. Place the first fixing structure on the upper part of the three-part mold and tighten the nut to fix the three-part mold between the first and second fixing structures. When replicating the sample, simply loosen the nut on the first fixing structure, remove the three-part mold and place it between the first and second fixing structures. The device does not need to be disassembled.

[0065] 2. If using cement mortar or gypsum-like rock materials, a brittle rock-like material is produced by pouring fluid into a three-part mold, followed by demolding and curing. First, calculate the mass of each fluid layer, the angle of the designed inclined surface, and the height h1 of the highest point of the inclined surface from the top surface of the specimen. Then, pour one type of fluid material into the three-part mold, insert a thin rod to compact it, and use a force-transmitting structure to initially shape the fluid surface. Next, place a flat pad on the initially shaped surface within the three-part mold, and then manually press and compact the flat pad with a clean force-transmitting structure. The degree of compaction is controlled by measuring the height of the exposed force-transmitting structure. Remove the force-transmitting structure, use a magnet with a rope to hold the pad, and then remove the pad. Then, pour another type of fluid material, repeating the process of pouring, inserting and compacting, initially shaping, shaping, and compacting different layers of fluid material. The top surface of the specimen can be manually compacted by pressing a cylindrical shape using the upper surface of the force-transmitting structure. In addition, to reduce the amount of fluid material adhering to the bottom of the force-transmitting structure and flat pad, adhesive tape can be applied to its bottom surface. The prepared specimens are then cured, demolded, and cured again in a curing chamber according to the material demolding time and the required curing time for the study, thus completing the specimen fabrication.

[0066] 3. If the rock sample is made by pressing barite powder, quartz sand, iron concentrate, and rosin alcohol solution as the mixing materials, first design the layers and calculate the mass and volume of different mixing materials. Pour one mixing material into a three-part mold, use a force transmission structure for preliminary shaping, place a flat pad, and then use a clean force transmission structure to compact and shape it on the flat pad. Compaction is carried out slowly by controlling the displacement of the press. The press is stopped by controlling the compression displacement of the press. Without unloading, let the press stand for 10 minutes, unload, remove the flat pad, roughen the material surface, and continue to add the second mixing soil sample. Complete the entire specimen according to the layer design. Remove the three-part mold and demold to complete the specimen preparation.

[0067] 4. When preparing soil samples, according to the designed layers and the calculated quality of different soil layers, different soils are repeatedly loaded, the inclined surface is initially shaped, and finally compacted in layers. Unlike 2 and 3, no release agent or curing is required. When compacting, a compactor is used in conjunction with the compaction process. The degree of compaction is controlled by controlling the number of times the compaction hammer falls and the height of the force transmission structure exposed.

[0068] In summary, the soil and rock sample preparation device of this embodiment uses a first fixing structure and a second fixing structure to fix the sample mold. Simultaneously, a guide ridge is provided on the central through-hole wall of the first fixing structure, which matches the guide groove on the force transmission structure, ensuring that the inclined surface of the layered soil and rock mass maintains a fixed inclination angle during the test preparation process. While keeping the position of the guide groove on the force transmission structure constant, precise preparation of layered soil and rock masses with complex inclined surfaces can be achieved by creating force transmission structures with inclined surfaces of different inclination angles and directions. Furthermore, a better compaction effect is achieved by using an inclined flat pad under the inclined surface of the force transmission structure with grooves and inclined surfaces.

[0069] Based on this, by designing a second fixed structure with a non-penetrating opening at the center that can accommodate rings of different sizes, a design and manufacturing method for multiple diameter combination devices is presented, enabling the production of layered rock and soil specimens of different diameters using a single device. Simultaneously, sample preparation methods for rock and soil samples are designed. Depending on the sample material, the device can be used with different compaction methods such as a press, compactor, or manual operation to achieve the preparation of layered samples of rock-like materials and soil.

[0070] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0071] The block diagrams of devices, apparatuses, devices, and systems disclosed herein are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0072] Additionally, as used herein, the “or” used in a list of items beginning with “at least one” indicates a separate list, such that a list of, for example, “at least one of A, B, or C” means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word “exemplary” does not imply that the described example is preferred or better than other examples.

[0073] It should also be noted that in the systems and methods of this disclosure, the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions to this disclosure.

[0074] Various changes, substitutions, and modifications can be made to the technology described herein without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims of this disclosure is not limited to the specific aspects of the processes, machines, manufactures, events, means, methods, and actions described above. Currently existing or later-developed processes, machines, manufactures, events, means, methods, or actions that perform substantially the same function or achieve substantially the same result as the corresponding aspects described herein can be utilized. Therefore, the appended claims include such processes, machines, manufactures, events, means, methods, or actions within their scope.

[0075] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features disclosed herein.

[0076] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this disclosure to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations therein.

Claims

1. A sample preparation device for soil and rock specimens, characterized in that, The sample includes a force transmission structure, a sample mold, and a first fixing structure and a second fixing structure for fixing the sample mold. The force transmission structure has a first surface and a second surface opposite to each other. The first surface is a plane and the second surface is an inclined plane. The sample mold has a cavity for accommodating a soil and rock sample. The outer wall of the force transmission structure has multiple grooves, the extension direction of the grooves is the same as the axial direction of the force transmission structure, the first fixing structure has a through opening, the inner wall of the first fixing structure located at the through opening has multiple guide ridges that cooperate with the grooves, and the inner diameter of the sample mold is the same as the diameter of the through opening. When the sample preparation device is in the assembled state, the sample mold is located between the first fixed structure and the second fixed structure. The force transmission structure cooperates with the guide ridge through the groove, and the force transmission structure extends into the cavity of the sample mold through the through opening.

2. The sample preparation apparatus for soil and rock specimens according to claim 1, characterized in that, The sample preparation device also includes a plurality of support rods located between the first fixed structure and the second fixed structure. Each support rod has a first end and a second end. The first end of each support rod is threaded to the first fixed structure, and the second end of each support rod is threaded to the second fixed structure. The first end of each support rod extends out of the upper surface of the first fixed structure.

3. The sample preparation apparatus for soil and rock specimens according to claim 2, characterized in that, The height of the sample mold between the first fixed structure and the second fixed structure is the same as the height of each support rod between the first fixed structure and the second fixed structure.

4. The sample preparation apparatus for soil and rock specimens according to claim 1, characterized in that, The length of the groove is the same as the length of the outer wall of the force transmission structure along the axial direction.

5. The sample preparation apparatus for soil and rock specimens according to claim 1, characterized in that, The second fixing structure has a non-penetrating opening, which is used to fix the sample mold. When the diameter of the sample mold is a preset diameter, the non-penetrating opening matches the bottom of the sample mold.

6. The sample preparation apparatus for soil and rock specimens according to claim 5, characterized in that, When the diameter of the sample mold is smaller than the preset diameter, the sample preparation device further includes a diameter reduction auxiliary component, which is located inside the non-through opening and has an opening that matches the bottom of the sample mold.

7. The sample preparation apparatus for soil and rock specimens according to claim 1, characterized in that, When the sample preparation device is in the assembled state, the bottom end of the force transmission structure is located inside the sample mold.

8. The sample preparation apparatus for soil and rock specimens according to claim 7, characterized in that, The soil and rock sample includes soil sample and rock sample. If the soil and rock sample is soil sample, the sample preparation device also includes a compaction mechanism. When the sample preparation device is in the assembled state, the compaction mechanism is located above the first surface of the force transmission structure. If the soil and rock sample is a rock sample, the sample preparation device further includes a compaction mechanism. When the sample preparation device is in the assembled state, the compaction mechanism is located above the first surface of the force transmission structure.

9. The sample preparation apparatus for soil and rock specimens according to claim 7, characterized in that, The sample preparation device also includes a flat shim, which has the same inclination direction as the second surface. The outer wall of the flat shim is in contact with the inner wall of the sample mold. When the sample preparation device is in the assembled state, the flat shim is located between the second surface and the soil sample.

10. The sample preparation apparatus for soil and rock specimens according to claim 9, characterized in that, The sample preparation device also includes a gasket adsorption component, which is used to remove the flat gasket after each layer of soil and rock sample preparation is completed.

11. The sample preparation apparatus for soil and rock specimens according to any one of claims 1 to 10, characterized in that, The sample mold includes a three-lobed mold and a reinforcing ring. When the sample preparation device is in the assembled state, the reinforcing ring is sleeved on the outer wall of the three-lobed mold.

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