Rapid unloading geotechnical testing device and its usage method

Abstract

This invention discloses a rapid unloading geotechnical testing device and its usage method, belonging to the field of geotechnical testing technology. The testing device includes: a support frame with a drop hole; a slide rail mounted on the support frame; a material box located below the slide rail and capable of sliding along it; a test pedestal with a removable baffle at its bottom. During unloading, the test pedestal slides along the slide rail above the drop hole on the support frame, allowing the filler material on the pedestal to fall into the material box through the drop hole after the baffle at the bottom of the test pedestal is removed; and a jack positioned between the slide rail and the support frame. The jack is used to lift the slide rail from the support frame before moving the test pedestal, thereby raising the test pedestal, or to press the slide rail down during sample loading, loading, and unloading, thereby pressing the test pedestal down onto the support frame. Using this method, the filler material can be quickly dropped into the material box by gravity, saving time and effort in sample removal.

Description

Technical Field

[0001] This application relates to the field of geotechnical engineering testing technology, and in particular to a rapid unloading geotechnical testing device and its usage method. Background Technology

[0002] Currently, most triaxial testing platforms for geotechnical engineering on the market are fixed test benches. When dismantling large triaxial specimens of coarse-grained soil, a shovel is needed to remove the specimen layer by layer from the top down. However, for specimens with large shear strain or tightly packed gravel, dismantling becomes difficult. In addition, the triaxial specimen is wrapped with a rubber membrane. The disadvantages of this type of assembly are: 1. Dismantling requires removing from the top down, and it is difficult to clean the test bench properly; 2. Reloading requires moving the material box, making the overall dismantling process cumbersome; 3. Using a traditional shovel for dismantling can easily damage the rubber membrane and other test materials, affecting the efficiency of the test. Summary of the Invention

[0003] Therefore, it is necessary to provide a rapid unloading geotechnical testing device and its usage method that allows the filler to quickly slide into the material box under gravity, thereby saving sample removal time and effort, in order to address the aforementioned technical problems.

[0004] In a first aspect, this application provides a rapid unloading geotechnical testing device, the device comprising:

[0005] The bracket has a drop hole;

[0006] A slide rail, which is mounted on the bracket;

[0007] A material box, which is located under the slide rail and slides along the slide rail;

[0008] The test bench has a detachable baffle at the bottom, and when unloading, the test bench slides above the drop hole of the bracket via the slide rail, so that after the baffle at the bottom of the test bench is removed, the filler on the test bench falls into the material box through the drop hole.

[0009] A jack is disposed between the slide rail and the support. The jack is used to lift the slide rail from the support before moving the test bench, so as to raise the test bench; or to press the slide rail down during sample loading, loading and unloading, so as to press the test bench down onto the support.

[0010] In one embodiment, the test bench is provided with two limiting grooves, which are arranged in parallel to form a release opening and a clamping groove. The baffle is screwed in and out of the limiting grooves so that the baffle is clamped to the bottom of the test bench, or the baffle is removed from the bottom of the test bench.

[0011] In one embodiment, the release opening has a screw-in arc, the clamping groove has a clamping arc, the radial distance of the release opening is greater than the radial distance of the clamping groove, wherein the radial direction of the release opening is parallel to the limiting groove, and the radial direction of the clamping groove is perpendicular to the limiting groove.

[0012] In one embodiment, the test bench further includes a central portion, and the baffle includes two rotors and a latch. The rotors are used to rotate under the drive of the latch. The bottom surface of the central portion is provided with a fan-shaped protrusion, and the baffle includes a fan-shaped groove corresponding to the fan-shaped protrusion. When the central portion is installed on the baffle, the fan-shaped protrusion rotates within a 90° range in the fan-shaped groove.

[0013] In one embodiment, the diameter of the drop hole is larger than the diameter of the baffle.

[0014] In one embodiment, the slide rail is a U-shaped slide rail, and a groove is provided on the inner side except for the lower half of the front arc-shaped slide rail of the slide rail. The groove is used for the sliding of the test bench. During unloading, the test bench and the material box are slid to the two parallel slide rails of the U-shaped slide rail and the position corresponding to the drop hole to achieve the first unloading. After the first unloading is completed, the test bench and the material box are slid to the front arc-shaped slide rail of the U-shaped slide rail to achieve the second unloading.

[0015] In one embodiment, the tail end of the U-shaped slide rail is provided with a rod with a limiting hole, and the tail end of the bracket is provided with a threaded hole; the device further includes a threaded limiting rod, which fixes the U-shaped slide rail to the bracket through the rod with the limiting hole and the threaded hole.

[0016] In one embodiment, the material box includes pulleys, bottom wheels, and drawer slide rails. The bottom wheels are used to slide the material box, and the pulleys and drawer slide rails are used to control the material box to slide along the slide rails to the front outer side of the support.

[0017] Secondly, this application also provides a method for using a rapid unloading geotechnical testing device, the method comprising:

[0018] After the test loading is completed, the jack is inflated so that the slide rail is lifted off the support;

[0019] Slide the slide rail above the drop hole of the bracket, release the air from the jack so that the test bench presses onto the bracket, and after disassembling the bottom of the test bench, perform the first unloading so that the filler on the test bench falls into the material box through the drop hole.

[0020] Inflate the jack so that the test bench is lifted off the support;

[0021] The test bench slides to the arc-shaped slide rail of the U-shaped slide rail and the material box slides to a predetermined position outside the support to perform the second unloading.

[0022] In one embodiment, after performing the second unloading, the process includes:

[0023] Push the test bench to the sample loading position and release the air from the jack so that the test bench presses onto the support.

[0024] Samples are loaded through the filler in the material box, the jack is inflated to lift the test bench from the support and slide it to the test position, and the jack is deflated to press the test bench onto the support.

[0025] Load the sample at the test position. After the test, continue to inflate the jack so that the slide rail is lifted off the support for unloading the next set of samples.

[0026] The aforementioned rapid unloading geotechnical testing device and its usage method feature a detachable baffle at the bottom of the test pedestal. During unloading, the test pedestal slides along the slide rail above the drop hole of the support. After the baffle at the bottom of the test pedestal is removed, the filler material on the test pedestal falls into the material box through the drop hole. This allows for rapid unloading by gravity, causing the filler material to slide into the material box quickly, saving sampling time and improving sampling efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a rapid unloading geotechnical testing device in one embodiment;

[0028] Figure 2 This is a schematic diagram of the test bench in one embodiment;

[0029] Figure 3 This is a schematic diagram of the center of the test bench and the baffle in one embodiment;

[0030] Figure 4 This is a schematic diagram of the installation of the test bench and baffle in one embodiment;

[0031] Figure 5 This is a schematic diagram of the interface between the U-shaped slide rail and the track in one embodiment;

[0032] Figure 6 This is a schematic diagram of the bracket drop hole in one embodiment;

[0033] Figure 7 This is a schematic diagram of a threaded limiting rod and a guide rail with a limiting hole at the tail end in one embodiment;

[0034] Figure 8 This is a schematic diagram of a material box in one embodiment;

[0035] Figure 9 This is a schematic diagram of the first unloading in one embodiment;

[0036] Figure 10 This is a schematic diagram of the second unloading in one embodiment;

[0037] Figure 11 This is a schematic diagram of the sample loading steps in one embodiment;

[0038] Figure 12 This is a schematic diagram of the test steps in one embodiment;

[0039] in,

[0040] 1. Center of the test bench; 11. Top of the center; 12. Center baffle; 13. Fixing bolt; 14. Fan-shaped groove; 15. Rotor; 2. Outer circle of the test bench; 21. First pulley; 22. Limiting groove; 3. Pneumatic jack; 4. U-shaped slide rail; 41. Grooved rail; 42. Ungrooved rail; 43. Rod with limiting hole; 5. Threaded limiting rod; 51. Rod cap; 52. Thread; 6. Bracket; 61. Drop hole; 62. Threaded hole; 7. Material box; 71. Drawer-type slide rail; 72. Box body; 73. Second pulley. Detailed Implementation

[0041] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 invention.

[0043] 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 at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0047] In one embodiment, see Figure 1 As shown, Figure 1 This is a schematic diagram of a rapid unloading geotechnical testing device in one embodiment. The rapid unloading geotechnical testing device includes a support 6, a slide rail 4, a material box 7, a jack 3, a test platform center 1, and a test platform outer circle 2.

[0048] The support 6 has a drop hole 61, which is optionally located in the middle of the top panel of the support 6, allowing the support 6 to pass through. This allows the filler material placed on the test bench on the support 6 to fall through the drop hole 61 into the material box 7 below the support 6. For ease of understanding, the entire device is divided into three areas: a discharge area, a test area, and a sample loading area. The discharge area is located in the middle, corresponding to the drop hole 61. The test area and loading area are located on either side of the discharge area. Optionally, the sample loading area is closer to the arc-shaped slide rail at the front end of the U-shaped slide rail 3, while the test area is farther away from the arc-shaped slide rail at the front end of the U-shaped slide rail 3.

[0049] The slide rail 4 is mounted on the bracket 6, that is, the slide rail 4 is mounted on the top panel of the bracket 6. Optionally, the slide rail 4 is a U-shaped slide rail 4, which includes two parallel slide rails and an arc-shaped front end. The distance between the two U-shaped slide rails is slightly smaller than the width of the bracket 6, so that the two parallel slide rails can be fixed to the top panel of the bracket 6. Each U-shaped slide rail consists of a grooved rail 41, a grooveless rail 42, and a rod with a limiting hole 43. The two arms of the U-shaped slide rail correspond to the length of the bracket 6, and the arc-shaped slide rail at the front end is located on the outside of the bracket 6. The other side is fixed to the bracket 6 by a threaded limiting rod 5.

[0050] The material box 7 is located below the slide rail 4 and slides along the slide rail 4. That is to say, the upper part of the slide rail 4 is the test bench, and the lower part is the material box 7. Both can slide freely within the groove on the slide rail 4 to adjust the position of the material box 7 and the test bench.

[0051] A jack 3 is positioned between the slide rail 4 and the support 6, with the jack 3 fixed at a specific location on the support 6. Preferably, four jacks 4 are spaced apart at the four corners of the support, and the other side of the jack 3 supports the slide rail 4. In one embodiment, the jack 3 is a pneumatic jack 3; in other embodiments, other types of jacks 3 can be selected, which are not specifically limited here. The jack 3 is used to lift the slide rail 4 from the support 6 before moving the test bench, thereby raising the test bench; or to press the slide rail 4 down during unloading, thereby pressing the test bench down onto the support 6.

[0052] The baffle 12 of the center part 1 of the test bench is detachable. When the test bench is unloading, it slides above the drop hole 61 of the support 6 via the slide rail 4. That is, when the test bench is in the unloading area, the rotor 15 rotates out of the limiting groove 22 of the outer circle 2 of the test bench by rotating the baffle 12. After the center part 1 of the test bench is removed, the filler on the outer circle 2 of the test bench falls into the material box 7 through the drop hole 61. The side of the outer circle 2 of the test bench includes a first pulley 21, which is engaged in the grooved rail 41 of the slide rail 4 so that the test bench 2 can slide on the slide rail 4.

[0053] In the above embodiment, the bottom center baffle 12 of the center part 1 of the test bench is detachable, so that when the test bench is unloading, it slides above the drop hole 61 of the bracket 6 via the slide rail 4. After the bottom center baffle 12 of the center part 1 of the test bench is removed, the filler on the test bench falls into the material box 7 through the drop hole 61. In this way, the unloading can be quickly achieved by sliding down into the material box 7 under the action of gravity, saving the time and effort of sample removal. Moreover, the bracket 6 with a hole in the middle can achieve rapid unloading.

[0054] In one embodiment, two limiting grooves 22 are provided on the outer circle 2 of the test bench. The two limiting grooves 22 are arranged in parallel to form a release opening and a clamping groove. The central baffle 12 is set at the limiting groove 22 by screwing, so that the central baffle 12 can be removed from the bottom of the outer circle 2 of the test bench, or the central baffle 12 can be clamped to the bottom of the outer circle 2 of the test bench.

[0055] Among them, see Figures 2 to 4 As shown, Figure 2 This is a schematic diagram of test benches 1 and 2 in one embodiment. Figure 3 This is a schematic diagram of the disassembly and installation of the central baffle 12 in one embodiment.

[0056] In this embodiment, a detachable central baffle 12 is installed on the test bench. The central baffle 12 is mounted on the bottom of the outer circle 2 of the test bench. The central baffle 12 can be rotated so that its two wings are positioned between two limiting grooves 22, thereby separating the central part 1 of the test bench connected to the central baffle 12 from the outer circle 2 of the test bench. This method of rotating and disassembling the central baffle 12 results in a low failure rate. Combined with... Figure 3 The test bench's central portion 2 includes two rotors 15 and a fixing bolt 13 for easy tightening with a wrench. The rotors 15 rotate under the influence of the fixing bolt 13. Figure 4 The outer circle 2 of the test bench is provided with two limiting grooves 22. Specifically, the limiting grooves 22 are located at the bottom of the outer circle 2 of the test bench. The two limiting grooves 22 are arranged in parallel to form a loosening opening and a clamping groove, wherein the combination Figure 4 The release opening has a screw-in arc, and the clamping groove has a clamping arc. The radial distance of the release opening is greater than the radial distance of the clamping groove. The radial direction of the release opening is parallel to the limiting groove 22, and the radial direction of the clamping groove is perpendicular to the limiting groove 22. The outer circle 2 of the test bench and the central part 1 of the test bench can be disassembled at will, ensuring firmness during the test.

[0057] In one embodiment, the combination continues. Figure 3 and Figure 4 As shown, the test bench also includes a central part, the bottom surface of which is provided with a fan-shaped protrusion, and the buckle includes a fan-shaped groove corresponding to the fan-shaped protrusion. When the central part is installed on the baffle, the fan-shaped protrusion at the top 11 of the central part can rotate within the range of the fan-shaped groove with a larger angle on the baffle 12 of the central part.

[0058] Specifically, in this embodiment, the test rig comprises two parts: one part is the test rig body, which can be regarded as... Figure 3 The outer circle 2 in the middle is partly the central part, which is used to support the packing material for the test during the test. It consists of the top 12 of the central part and the central baffle 13, and is fitted with fixing bolts 13 to fix the central baffle 13 to fix the central part to the test bench body.

[0059] Specifically, after the jack descends, the test pedestal body will press down on the test platform for testing. The test pedestal body is equipped with a first pulley 21 for sliding on the slide rail. In addition, the test pedestal is also provided with limit grooves 22 at intervals. The limit grooves 22 can be semi-circular or rod-shaped, as long as there is a hollow in the middle to accommodate the rotor.

[0060] The top of the central part is used to support the packing material during the test. The lower part is provided with double fan-shaped protrusions, and the center of the two double fan-shaped protrusions is provided with screw holes for connecting and rotating with the baffle.

[0061] The central baffle 12 is used to rotate into the spaced-in insertion groove 22 during the test; after the test, it is rotated out of the spaced-in insertion groove 22 to remove the entire central part.

[0062] The central baffle 12 has a screw hole at its center, housing an internal hex bolt and a hex nut. The bolt connects the central part of the test bench to the baffle, while the nut serves as the medium for contact between the central part and the wrench, facilitating rotation and removal of the central part. The top 11 of the central part has a fan-shaped protrusion, while the central baffle 12 has two larger-angle double-fan-shaped grooves. This ensures that within a certain range (90°), only the central baffle 12 rotates when the bolt is tightened. This is because after the test, the filler adheres tightly to the top of the central part of the test bench; if the entire central part were to rotate simultaneously, significant resistance would occur.

[0063] In one embodiment, the diameter of the drop hole 61 is larger than the diameter of the central baffle 12, preferably slightly larger. Meanwhile, the tail of the bracket 6 is provided with a screw hole for installing the threaded limiting rod 5.

[0064] In one embodiment, the slide rail 4 is a U-shaped slide rail 4, and a groove is provided on the upper part of the slide rail 4 for the sliding of the test bench; and during unloading, the test bench and the material box 7 are slid to the two parallel slide rails of the U-shaped slide rail 4 and the position corresponding to the drop hole 61 to achieve the first unloading. After the first unloading is completed, the test bench and the material box 7 are slid to the front arc-shaped slide rail of the U-shaped slide rail 4 to achieve the second unloading.

[0065] In one embodiment, the tail of the U-shaped slide rail 4 is provided with a rod 43 with a limiting hole, and the tail of the bracket 6 is provided with a threaded hole 52; the device also includes a threaded limiting rod 5, which includes a rod cap 51 and a thread 52, wherein the threaded limiting rod 5 fixes the U-shaped slide rail 4 to the bracket 6 through the rod 43 with the limiting hole and the threaded hole 52.

[0066] In one embodiment, grooves for jacks 3 are provided on the two parallel rails of the U-shaped slide rail 4, and the grooves for jacks 3 are used to fix the position of the jacks 3. Optionally, four pneumatic jacks 3 are provided between the U-shaped slide rail 4 and the test platform to control the lifting and lowering of the U-shaped slide rail 4.

[0067] Specifically, in combination Figures 5 to 7 As shown, where Figure 5 This is a schematic diagram of the interface between the U-shaped slide rail 4 and the grooved rail 41 of the U-shaped slide rail 4 in one embodiment. Figure 6 This is a schematic diagram showing the position of the drop hole 61 on the bracket 6. Figure 7In one embodiment, the threaded limiting rod 5 and the U-shaped slide rail 4 are equipped with limiting rods, so that the U-shaped slide rail can only move up and down a certain distance under the control of the jack 3.

[0068] Specifically, the U-shaped slide rail 4 includes two parallel slide rails and a front arc-shaped slide rail. The U-shaped slide rail 4 has good stability and is not prone to deformation. At the same time, the outer circle 2 of the test bench is flipped to the front end of the U-shaped slide rail 4 for cleaning. The U-shaped slide rail 4 is installed on the upper and lower parts of the base. The upper part has a detachable test bench in the middle and a material box 7 at the bottom. Both can slide freely on the grooved rail 41 on them.

[0069] Optionally, four pneumatic jacks 3 are installed between the U-shaped slide rail 4 and the test platform to control the lifting and lowering of the U-shaped slide rail 4. The four jacks 3 engage with the recesses on the U-shaped slide rail 4, ensuring a stable lifting effect. In addition, a threaded limiting rod 5 fixes the U-shaped slide rail 4 to the bracket 6, and the addition of the threaded limiting rod 5 improves the overall stability of the U-shaped slide rail 4.

[0070] In this embodiment, four jacks 3 are fixed on the bracket 6. The U-shaped slide rail 4 is groove-shaped, allowing the test bench and the drawer-type slide rail 72 of the material box 7 to slide freely on it. The middle has a corresponding recess for installing the jacks 3, and the tail is a rod 43 with a limiting hole and a pre-reserved strip-shaped gap in the middle. The pneumatic lifting test bench is composed of four jacks 3, and the top of the jacks 3 can be inserted into the reserved groove. The threaded limiting rod 5 is mushroom-shaped with a thread 52 at one end, which can be removed by rotation. The hollow bracket 6 in the middle is used to support the weight of the components of the device and the sample, as well as the load during the test. A drop hole 61 of appropriate size is reserved in the middle.

[0071] In one embodiment, the material box 7 includes a drawer slide rail 71, a box body 72, and a second pulley 73. The second pulley 73 is used to slide the material box 7, and the drawer slide rail 71 is used to control the material box 7 to slide along the drawer slide rail 71 and to slide out of the grooved rail 41 at the bottom of the U-shaped rail 4 within a certain range.

[0072] Specifically, in combination Figure 8 As shown, the material box 7 with second pulleys 73 has wheels at the bottom and second pulleys 73 on both sides of the top for easy sliding. The material box 7 with second pulleys 73 makes it easy to pull the filler out from the bottom of the bracket 6 for quick refilling.

[0073] In one embodiment, a method for using a rapid unloading geotechnical testing device is provided, specifically, in conjunction with... Figures 9 to 12 As shown, the usage method includes:

[0074] S1: Inflate jack 3 so that slide rail 4 is lifted off bracket 6.

[0075] Specifically, in this embodiment, the U-shaped slide rail 4 is lifted by inflating the pneumatic jack 3.

[0076] S2: Slide the slide rail 4 above the drop hole 61 of the bracket 6, release the air from the jack 3 so that the test bench presses onto the bracket 6, and after the bottom of the test bench 1 and 2 are disassembled, perform the first unloading so that the filler on the test bench falls into the material box 7 through the drop hole 61.

[0077] Specifically, in combination Figure 9 As shown, Figure 9 This is a schematic diagram of the first unloading in one embodiment. In this embodiment, the central part 1 of the test bench is disassembled to perform the first unloading, so that most of the material falls out. Specifically, the test bench and the material box 7 with the second pulley 73 are slid to the hollow position in the middle of the support 6, that is, aligned with the direction of the drop hole 61. The jack 3 is deflated to press the test bench down onto the table surface of the support 6. The baffle 12 in the center of the test bench is rotated to the movable position using a wrench or other assistive tool. In this way, the central part 1 of the test bench can be removed, and the filler in the sample can fall into the material box 7 by gravity. At the same time, the sample can be gently tapped or shaken to accelerate the falling of the filler.

[0078] S3: Inflate jack 3 so that the test bench is lifted off support 6.

[0079] S4: The test bench 2 and the material box 7 slide to the predetermined position of the slide rail 4 to perform the second unloading.

[0080] Specifically, in combination Figure 10 As shown, Figure 10 This is a schematic diagram of the second unloading in one embodiment. After the first unloading, most of the filler has fallen into the material box 7, but there is still some residual filler. Therefore, the test bench is slid to the top of the U-shaped slide rail 4 and the material box 7 is pulled out to the outside of the support 6 for thorough cleaning.

[0081] Specifically, after most of the packing has fallen from the test bench into the material box 7 with the second pulley 73, the pneumatic jack 3 is inflated again to lift the U-shaped slide rail 4, and the test bench is slid to the top of the U-shaped slide rail 4, that is, the front arc-shaped slide rail of the U-shaped slide rail 4, and the material box 7 is pulled out of the support 6; the rubber diaphragm is removed, and the remaining packing on the test bench is cleaned into the material box 7 to complete the cleaning of the packing.

[0082] Optionally, after performing the second unloading, the following steps are included:

[0083] S5: Push the test bench to the sample loading position and release the air from the jack 3 so that the test bench presses onto the support 6.

[0084] Specifically, in combination Figure 11 As shown, Figure 11 This is a schematic diagram of the sample loading steps in one embodiment, in which the test bench is slid up to the sample loading area for the next sample loading.

[0085] S6: Load the sample through the filler in the material box 7, inflate the jack 3 so that the test bench is lifted from the support 6 and slid to the test position, deflate the jack 3 so that the test bench presses onto the support 6.

[0086] S7: Conduct the test at the test position and inflate the jack 3 so that the test platform is lifted off the support 6.

[0087] Specifically, in combination Figure 12 As shown, Figure 12 This is a schematic diagram of the test steps in one embodiment, in which the test bench is slid to the loading area to conduct the next set of tests.

[0088] Specifically, after cleaning the outer circle 2 of the test bench, the test bench can be pushed up to the sample loading position, and the jack 3 can be deflated to press the test bench down onto the support 6. The filler material in the material box 7 with the second pulley 73, which has been slid to the outside of the support 6, is used to load and compact the sample. Then, the pneumatic jack 3 is inflated to raise the U-shaped slide rail 4, and then slid to the test position to lower the jack 3 for the test. The above steps are repeated to set different confining pressure, load type, filler type and other parameters to complete the triaxial test of coarse-grained soil under different conditions.

[0089] In the above embodiment, the center part 1 of the deformable test bench is fixed on the slide rail 4, and the material is quickly unloaded using the empty position of the test bench 2. During the test, the center baffle 12 can be locked to prepare samples and apply test loads. After the test, the center baffle 12 can be removed to make the bottom plate hollow. The filler material after the test can quickly slide down into the material box 7 below by gravity. This test device can save time and effort in sample removal.

[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A rapid unloading geotechnical testing device, characterized in that, The device includes: The bracket has a drop hole; A slide rail, which is mounted on the bracket; A material box, which is located under the slide rail and slides along the slide rail; The test bench has a detachable baffle at the bottom, and when unloading, the test bench slides along the slide rail to above the drop hole of the bracket, so that after the baffle at the bottom of the test bench is removed, the filler on the test bench falls into the material box through the drop hole. A jack is disposed between the slide rail and the support. The jack is used to lift the slide rail from the support before moving the test bench, so as to raise the test bench; or to press down the slide rail during sample loading, loading and unloading, so as to press the test bench down onto the support. The test bench is provided with two limiting grooves, which are arranged in parallel to form a release opening and a clamping groove. The baffle is set inside and outside the limiting groove by screwing, so that the baffle is clamped to the bottom of the test bench, or the baffle is removed from the bottom of the test bench.

2. The apparatus according to claim 1, characterized in that, The release opening has a screw-in arc, the clamping groove has a clamping arc, the radial distance of the release opening is greater than the radial distance of the clamping groove, wherein the radial direction of the release opening is parallel to the limiting groove, and the radial direction of the clamping groove is perpendicular to the limiting groove.

3. The apparatus according to claim 1 or 2, characterized in that, The test bench also includes a central part, and the baffle includes two rotors and a buckle. The rotors are used to rotate under the drive of the buckle. The bottom surface of the central part is provided with a fan-shaped protrusion, and the baffle includes a fan-shaped groove corresponding to the fan-shaped protrusion. When the central part is installed on the baffle, the fan-shaped protrusion rotates within a 90° range in the fan-shaped groove.

4. The apparatus according to claim 1 or 2, characterized in that, The diameter of the drop hole is larger than the diameter of the baffle.

5. The apparatus according to claim 1 or 2, characterized in that, The slide rail is a U-shaped slide rail, and a groove is provided on the inner side except for the lower half of the front arc-shaped slide rail of the slide rail. The groove is used for the sliding of the test bench. During unloading, the test bench and the material box are slid to the two parallel slide rails of the U-shaped slide rail and the position corresponding to the drop hole to achieve the first unloading. After the first unloading is completed, the test bench and the material box are slid to the front arc-shaped slide rail of the U-shaped slide rail to achieve the second unloading.

6. The apparatus according to claim 5, characterized in that, The U-shaped slide rail is provided with a rod with a limiting hole at its tail end, and the bracket is provided with a threaded hole at its tail end; the device also includes a threaded limiting rod, which fixes the U-shaped slide rail to the bracket through the rod with the limiting hole and the threaded hole.

7. The apparatus according to claim 1 or 2, characterized in that, The material box includes pulleys, bottom wheels, and drawer-type slide rails. The bottom wheels are used to slide the material box, and the pulleys and drawer-type slide rails are used to control the material box to slide along the slide rails to the front outer side of the support.

8. A method for using a rapid unloading geotechnical testing device, characterized in that, The geotechnical testing apparatus is the geotechnical testing apparatus according to any one of claims 1 to 7; the method of use includes: After the test loading is completed, the jack is inflated so that the slide rail is lifted off the support; Slide the slide rail above the drop hole of the bracket, release the air from the jack so that the test bench presses onto the bracket, and after disassembling the bottom of the test bench, perform the first unloading so that the filler on the test bench falls into the material box through the drop hole. Inflate the jack so that the test bench is lifted off the support; The test bench slides to the arc-shaped slide rail of the U-shaped slide rail and the material box slides to a predetermined position outside the support to perform the second unloading.

9. The method according to claim 8, characterized in that, After the second unloading is performed, the following is included: Push the test bench to the sample loading position and release the air from the jack so that the test bench presses onto the support. Samples are loaded through the filler in the material box, the jack is inflated to lift the test bench from the support and slide it to the test position, and the jack is deflated to press the test bench onto the support. Load the sample at the test position. After the test, continue to inflate the jack so that the slide rail is lifted off the support for unloading the next set of samples.

Images