Horizontal pressurization consolidation test method

Abstract

The invention provides a horizontal pressurization consolidation test method. The horizontal pressurization consolidation test method comprises the following steps: 1, preparing a plurality of cutting ring samples; 2, adjusting the size of a containing space formed by a plurality of soil sample cylinders and a plurality of pressure transmitting plates corresponding to the soil sample cylinders, and correspondingly and vertically placing a plurality of cutting ring samples and water permeable pieces in the containing space in sequence; 3, adjusting the distance between the plurality of pressure transmitting plates and the soil sample cylinder through a sliding block, and enabling the axes of the pressure transmitting plates and the soil sample cylinder to be horizontal and on the same straight line; step 4, applying graded preset pressure to the soil sample along the horizontal axis by a pushing mechanism, and accurately measuring the test pressure by a pressure sensor; 5, the soil sample is deformed in the horizontal direction under the pressure effect, and movement distance information of all the pressure transmission plates is collected through displacement sensors. The problem that an existing soil sample consolidation test method is low in efficiency and accuracy is solved.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering tests, and in particular to a horizontal pressurized consolidation test method. Background Art

[0002] The soil pressure consolidation test is one of the main methods for studying the variation of soil porosity with pressure and soil consolidation deformation characteristics. The principle is to apply external force to the soil, and water is discharged along the pores in the soil under the action of external force, so that the soil particles are displaced, the pores between the particles are reduced, and the soil volume is reduced and compressed. At present, the soil pressure consolidation test is one of the important methods for measuring the compression characteristics of soil. Through this test, parameters such as the compression coefficient and compression modulus of the soil can be obtained, which provides an important basis for engineering design and construction. In the existing soil pressure consolidation test method, the pressure is applied to the soil sample in different vertical directions to achieve the consolidation of the soil sample, record the vertical deformation after completion, and measure the relationship curve of the vertical deformation with time, so as to calculate the porosity, consolidation coefficient and compression deformation index of the soil under various levels of load. However, in the existing method, each container can only be pressurized for one soil sample, which is cumbersome, labor-intensive and inefficient; at the same time, a preload or zero-point pressure needs to be applied before the test, which will cause the soil sample to have initial deformation, affecting the accuracy of the test results.

[0003] As can be seen from the above, there are problems in the prior art of soil sample consolidation test methods with low efficiency and accuracy. Summary of the invention

[0004] The main purpose of the present invention is to provide a horizontal pressure consolidation test method to solve the problems of low efficiency and accuracy in existing soil sample consolidation test methods.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a horizontal pressurized consolidation test method, comprising: step one: preparing a plurality of knife ring specimens; step two: adjusting the size of a receiving space formed by a plurality of soil sample tubes and a plurality of pressure transmission plates corresponding to the soil sample tubes, and placing a plurality of knife ring specimens and water-permeable parts upright in the receiving space in turn; step three: adjusting the distance between the plurality of pressure transmission plates and the soil sample tubes by a slider, and making their axes horizontal and in a straight line; step four: applying a graded preset pressure to the soil sample along the horizontal axis by a pushing mechanism, and the test pressure is accurately measured by a pressure sensor; step five: the soil sample undergoes horizontal deformation under the action of pressure, and the moving distance information of each pressure transmission plate is collected by a displacement sensor.

[0006] Furthermore, step 2 also includes slidingly connecting the side walls of the plurality of soil sample tubes to the workbench and adjusting the opening directions of the soil sample tubes.

[0007] Furthermore, in step 2, the opening directions of the soil sample tubes are adjusted so that the openings of the plurality of soil sample tubes face the same direction or different directions.

[0008] Furthermore, step three also includes adjusting the relative positions of the multiple soil sample tubes and the multiple pressure transmission plates so that the multiple soil sample tubes and the multiple pressure transmission plates are coaxially arranged.

[0009] Furthermore, step five also includes obtaining the numerical information of the moving distance, and obtaining the pore ratio corresponding to the different pressures according to the different displacement information corresponding to each graded pressure, wherein the pore ratio e i The calculation model is: Where ei is the porosity ratio at a certain pressure level; ∑Δh i is the displacement of the sample under a certain level of pressure; h0 is the initial thickness of the sample.

[0010] Furthermore, in step 4, the construction force of the estimation mechanism is in a horizontal direction and can act on multiple soil samples at the same time.

[0011] Furthermore, in step 4, the preset pressure may be selectively applied from one side or both sides of the soil sample. If the preset pressure is applied from both sides of the soil sample, the same pressure must be applied simultaneously.

[0012] Furthermore, step five also includes fitting the data of the preset pressure and the moving distance into a curve.

[0013] Furthermore, step three also includes injecting water into the outer side of the soil sample tube until the soil sample is immersed in the water.

[0014] Furthermore, step two also includes setting water-permeable parts at both ends of the soil sample.

[0015] Applying the technical solution of the present invention, the horizontal pressurized consolidation test method includes: step one: preparing multiple knife ring specimens; step two: adjusting the size of the accommodation space formed by multiple soil sample tubes and multiple pressure transmission plates corresponding to the soil sample tubes, and sequentially placing multiple knife ring specimens and water-permeable parts in the accommodation space; step three: adjusting the distance between multiple pressure transmission plates and soil sample tubes by a slider, and making their axes horizontal and in a straight line; step four: applying graded preset pressure to the soil sample along the horizontal axis by a jacking mechanism, and the test pressure is accurately measured by a pressure sensor; step five: the soil sample deforms horizontally under the pressure, and the movement distance information of each pressure transmission plate is collected by a displacement sensor. In the traditional consolidation test method, each knife ring specimen is placed flat in a container, and each test container is individually applied with a vertical load, and only one specimen can be completed at a time. The consolidation test; before the test begins, in order to ensure good contact between the specimen and the upper and lower components of the instrument, a preload or zero-point pressure needs to be applied, which will cause the soil sample to deform under the action of the pressurized upper cover and the load, and this deformation will cause a certain error in the test results. The horizontal pressure consolidation test method prepares multiple test specimens through multiple ring cutters and places the ring cutters vertically in the accommodating space, adjusts the distance between multiple soil sample tubes and pressure transmission plates, thereby realizing the vertical placement and positioning of multiple soil samples. When a preset pressure is applied to the pressure transmission plate, the pressure transmission plate moves along the inner wall of the soil sample tube, thereby cooperating with the soil sample tube to clamp and compress the soil sample. In this process, the pressure exerted on the soil sample is horizontal pressure, and the pressure is transmitted between the multiple soil samples to complete the consolidation test of multiple soil samples. At the same time, compared with the traditional vertical pressure consolidation test method, the present application does not need to set a preload, so as to avoid deformation of the soil sample before the test affecting the test results, and ultimately improves the efficiency and accuracy of the test, and solves the problem of low efficiency and accuracy of the soil sample consolidation test method in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A flow chart showing a horizontal pressurized consolidation test method in a specific embodiment of the present invention; and

[0018] Figure 2 The schematic diagram of the structure of a horizontal pressure consolidation apparatus in a specific embodiment of the present invention is shown.

[0019] The above drawings include the following reference numerals:

[0020] 10. Workbench; 11. Bottom plate; 12. Vertical plate structure; 13. Drainage control component; 20. Soil sample pressure transmission component; 21. Soil sample tube; 211. Sample inlet; 22. Pressure transmission plate; 23. Guide member; 24. Displacement sensor; 25. Connecting bracket; 26. Ring knife; 27. Water-permeable member; 28. Slide rail; 29. ​​Slider; 30. Push mechanism; 31. Driving unit; 32. Push rod; 33. Pressure sensor; 40. Adjustment member; 50. Sealing member; 100. Soil sample. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0023] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0024] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] In order to solve the problem of low efficiency and accuracy of soil sample consolidation test methods in the prior art, the present invention provides a horizontal pressurization consolidation test method.

[0026] like Figure 1 As shown, the horizontal pressurized consolidation test method includes: step one: preparing a plurality of knife ring specimens; step two: adjusting the size of the accommodation space formed by a plurality of soil sample tubes 21 and a plurality of pressure transmission plates 22 corresponding to the soil sample tubes 21, and sequentially placing a plurality of knife ring specimens and water-permeable members 27 in an upright position in the accommodation space; step three: adjusting the distance between the plurality of pressure transmission plates 22 and the soil sample tubes 21 by means of a slider 29, and making their axes horizontal and in a straight line; step four: applying a graded preset pressure to the soil sample 100 along the horizontal axis by means of a pushing mechanism 30, and the test pressure is accurately measured by means of a pressure sensor 33; step five: the soil sample 100 is horizontally deformed under the action of pressure, and the moving distance information of each pressure transmission plate 22 is collected by means of a displacement sensor 24.

[0027] A plurality of soil samples 100 are prepared by using a plurality of ring cutters and the ring cutters are placed vertically in the accommodating space, and the distances between the plurality of soil sample tubes 21 and the pressure transmission plates 22 are adjusted, thereby realizing vertical placement and positioning of the plurality of soil samples 100, with each part in close and stable contact. When a preset pressure is applied to the pressure transmission plate 22, the pressure transmission plate 22 moves along the inner wall of the soil sample tube 21, thereby cooperating with the soil sample tube 21 to compress the soil sample 100. In this process, the pressure exerted on the soil sample 100 is horizontal pressure, and the pressure is transmitted between the plurality of soil samples 100, thereby completing the consolidation test of the plurality of soil samples 100. At the same time, compared with the traditional vertical pressure test, the present application can realize the consolidation test of a plurality of soil samples 100 under one load, and there is no need to set a preload or a zero-point pressure, thereby avoiding deformation of the soil sample 100 before the test that affects the test results, and ultimately improving the efficiency and accuracy of the test.

[0028] In this embodiment, step 2 further includes slidingly connecting the side walls of the plurality of soil sample tubes 21 to the workbench and adjusting the opening directions of the soil sample tubes 21 .

[0029] Specifically, the knife ring sample includes a soil sample 100 and a knife ring 26, a soil sample tube 21 and a pressure transmission plate 22 located in the soil sample tube 21 form a soil sample pressure transmission assembly 20, and slidingly connecting the soil sample tube 21 with the workbench 10 can facilitate adjustment of the distance between multiple soil sample pressure transmission assemblies 20, so that one side of any pressure transmission plate 22 abuts against the soil sample 100, and the other side abuts against the adjacent soil sample pressure transmission assembly 20. Sliding the soil sample tube 21 on the workbench can ensure that the two sides of the soil sample 100 are exactly abutted against the bottom of the soil sample tube 21 and the pressure transmission plate 22, respectively, so that the soil sample 100 is quickly compressed when a preset horizontal pressure is applied to the pressure transmission plate 22.

[0030] In this embodiment, in step 2, the opening directions of the soil sample tubes 21 are adjusted so that the openings of the plurality of soil sample tubes 21 face the same direction or different directions.

[0031] Specifically, the soil sample tube 21 is placed horizontally so that the axis of the soil sample tube 21 is horizontal. The multiple soil sample tubes 21 can be arranged head to tail, head to head, and tail to tail. No matter which of the three methods is used, the opening of the soil sample tube 21 is always horizontal. Since the horizontal pressure is applied, any of the three pressure application methods can be used. The final result is that the soil sample 100 is compressed and consolidated by the preset pressure in the horizontal direction, thereby simplifying the consolidation test steps of the soil sample 100 and avoiding excessive time spent on the placement of multiple soil sample pressure transmission components 20 in each test.

[0032] In this embodiment, step three further includes adjusting the relative positions of the plurality of soil sample tubes 21 and the plurality of pressure transmission plates 22 so that the plurality of soil sample tubes 21 and the plurality of pressure transmission plates 22 are coaxially arranged.

[0033] Specifically, multiple soil sample pressure transmission components 20 are arranged in sequence and located in the same straight line, so that multiple soil samples 100 can be arranged in the same straight line. When pressure is applied to the pressure transmission plate 22, the pressure areas and pressure magnitudes of each soil sample 100 are the same.

[0034] In this embodiment, step five also includes obtaining deformation information through a displacement sensor after each level of pressure is completed, and comparing it with the movement distance of the push mechanism 30 to timely determine the accuracy of the test.

[0035] Specifically, in this embodiment, the driving part 31 of the pushing mechanism 30 is a servo device. If the difference between the soil sample deformation s and the servo device moving distance y is less than 10%, it is considered that the test accuracy requirement is met. Otherwise, it does not meet the requirement and needs to be retested. n , where s1, s2, s n is the deformation measured by each displacement sensor; the servo device moves the distance y = ppm r / ppm s × L.ppm r is the total number of pulses, ppm s is the number of pulses per revolution, and L is the lead screw pitch.

[0036] In this embodiment, step five also includes obtaining the numerical information of the moving distance, and obtaining the pore ratio corresponding to the different pressures according to the different displacement information corresponding to each graded pressure, wherein the pore ratio e i The calculation model is: Among them, e i is the porosity ratio at a certain pressure level; ∑Δh i is the displacement of the sample under a certain level of pressure; h0 is the initial thickness of the sample.

[0037] Specifically, the height h0 of the soil sample 100 before compression is measured, and after applying the preset pressure, the pressure transmission plate 22 moves to compress and consolidate the soil sample 100. When the moving distance of the pressure transmission plate 22 no longer changes, the soil sample 100 has completed consolidation under the preset pressure. The moving distance of the pressure transmission plate 22 during this process and the displacement h1 of the soil sample 100 after the test are completed are measured, so as to calculate the porosity e of the sample under the preset pressure. i .

[0038] In this embodiment, in step four, a preset horizontal pressure can be selectively applied from one side or both sides of the soil sample 100. If the preset pressure is applied from both sides of the soil sample 100, the same pressure must be applied simultaneously and in the same straight line to ensure the effectiveness of the preset pressure.

[0039] Specifically, when applying the preset pressure, it is not limited to applying the preset pressure to the pressure transmission plate 22 , and the preset pressure may also be applied to the soil sample tube 21 , or the preset pressure may be applied to both the soil sample tube 21 and the pressure transmission plate 22 at the same time.

[0040] The following is a specific example to illustrate how to implement the horizontal pressure consolidation test method.

[0041] like Figure 2 As shown, the horizontal pressure consolidation instrument includes a workbench 10, a soil sample pressure transmission assembly 20, a push mechanism 30 and an adjustment member 40. The soil sample pressure transmission assembly 20 is multiple and is arranged in sequence on the workbench 10 in the horizontal direction, and the multiple soil sample pressure transmission assemblies 20 constitute a test unit. The adjustment member 40 and the push mechanism 30 are both arranged on the workbench 10 and located at both ends of the arrangement direction of the multiple soil sample pressure transmission assemblies 20, so that the adjustment member 40 and the push mechanism 30 are used to pressurize the test unit.

[0042] By arranging multiple soil sample pressure transmission assemblies 20 in the horizontal direction, the adjusting member 40 and the pushing mechanism 30 are respectively located at the two ends of the test unit, and the pushing mechanism 30 is used to apply horizontal pressure to one end of the test unit, so that multiple soil sample pressure transmission assemblies 20 are subjected to pressure at the same time. In this process, the soil sample 100 placed in the soil sample pressure transmission assembly 20 is deformed by the horizontal pressure. By applying the technical solution of the present application, multiple soil samples 100 can be tested at the same time. At the same time, since the soil sample 100 is only subjected to horizontal pressure, the deformation of the soil sample 100 caused by the dead weight of the soil sample pressure transmission assembly 20 is avoided to interfere with the test results, thereby improving the accuracy of the test results.

[0043] like Figure 2 As shown, the soil sample pressure transmission assembly 20 includes a soil sample tube 21 and a pressure transmission plate 22. The pressure transmission plate 22 is movably arranged at the side of the soil sample tube 21 and forms a space for accommodating the soil sample 100 together with the soil sample tube 21. The pressure transmission plate 22 abuts against another soil sample pressure transmission assembly 20 or directly abuts against the push mechanism 30, so that force is transmitted between two adjacent soil sample pressure transmission assemblies 20 through the pressure transmission plate 22.

[0044] Specifically, the size of the water-permeable member 27 connected to the pressure transmission plate 22 is adapted to the inner diameter of the soil sample 100, and is slightly smaller than the inner diameter of the ring knife 26, and smaller than the inner diameter of the soil sample tube 21, so that the pressure transmission plate 22 can extend into the soil sample tube 21. Multiple soil sample pressure transmission assemblies 20 are arranged along the same straight line and abut against each other, that is, the part of the pressure transmission plate 22 extending into the soil sample tube 21 forms a receiving space with the soil sample tube 21, and the other part abuts against the adjacent soil sample tube 21 or is connected to the pushing mechanism 30. Optionally, the pressure transmission plate 22 includes a plate body and a protruding structure arranged on the plate body, a receiving space is formed between one side of the plate body and the soil sample tube 21, the protruding structure is arranged on the other side of the plate body, and the protruding structure abuts against the bottom of the soil sample tube 21 of the adjacent soil sample pressure transmission assembly 20. This structure ensures the continuous transmission of pressure between multiple soil sample pressure transmission assemblies 20, avoids the problem of excessive local pressure, and is suitable for the scene where multiple soil samples 100 need to be pressurized at the same time.

[0045] In this embodiment, a plurality of soil sample pressure transmission components 20 are connected end to end in sequence to form a straight line.

[0046] In another embodiment of the present application which is not shown in the figure, two adjacent ones of the plurality of soil sample pressure transmission assemblies 20 are connected head to head or tail to tail, that is, the orientations of the plurality of soil sample pressure transmission assemblies 20 are not the same.

[0047] like Figure 2 As shown, an opening is provided on the side of the soil sample tube 21, and the pressure transmission plate 22 extends into the soil sample tube 21 through the opening, and the soil sample pressure transmission assembly 20 also includes a guide member 23, which is arranged at the opening to fix the pressure transmission plate 22 installed in the soil sample tube to prevent it from accidentally falling.

[0048] Specifically, the opening is set at the side of the soil sample tube 21. When the pressure transmission plate 22 is inserted into the opening, the guide member 23 is used to limit the pressure transmission plate 22, thereby keeping the pressure transmission plate 22 in a vertical state, preventing the pressure transmission plate 22 from tipping over due to its own weight, causing the soil sample 100 to be separated from the soil sample tube 21, or the pressure transmission plate 22 is tilted, causing the soil sample 100 to be unevenly stressed and causing the test to fail. At the same time, the setting of the guide member 23 increases the safety of the instrument, prevents accidents during the test, and greatly reduces the friction between the pressure transmission plate 22 and the guide member 23. It is suitable for laboratory environments where soil samples 100 need to be frequently replaced for testing, ensuring the smooth progress of the test.

[0049] like Figure 2 As shown, the soil sample pressure transmission assembly 20 further includes a displacement sensor 24 , and two ends of the displacement sensor 24 are respectively connected to the soil sample tube 21 and the pressure transmission plate 22 to detect the moving distance of the pressure transmission plate 22 .

[0050] Specifically, the displacement sensor 24 detects the moving distance of the pressure transmission plate 22 in real time. When the pressure of the soil sample 100 by the pushing mechanism 30 changes, the displacement sensor 24 can well detect the change of the soil sample 100 because the soil sample 100 itself is small and the deformation is not easy to observe. Optionally, the displacement sensor 24 is connected to a display to convert the compression deformation of the soil sample 100 that is not easy to observe into a digital change that is easy to observe, which can facilitate the test personnel to confirm the progress of the test.

[0051] like Figure 2 As shown, the soil sample pressure transmission assembly 20 further includes a connecting bracket 25 , and the displacement sensor 24 is connected to the pressure transmission plate 22 via the connecting bracket 25 .

[0052] Specifically, one end of the connecting bracket 25 is connected to the pressure transmission plate 22, and the other end is connected to the displacement sensor 24. Optionally, the two ends of the connecting bracket 25 are detachably connected to the pressure transmission plate 22 and the displacement sensor 24, respectively, and the connecting bracket 25 and the pressure transmission plate 22 and the displacement sensor 24 can be connected by threads or clamping. Of course, the connecting bracket 25 and the pressure transmission plate 22 can also be integrally formed, and the connecting bracket 25 and the displacement sensor 24 can be threadedly connected.

[0053] In this embodiment, the guide member 23 is an open linear bearing, the inner ring of the guide member 23 is connected to the pressure transmission plate 22, the outer ring is arranged in the soil sample tube 21, and the opening avoids the connection bracket 25. Of course, the guide member 23 can also be other structural members, as long as it meets the requirements of limiting the pressure transmission plate 22 and guiding the movement.

[0054] like Figure 1 As shown, the soil sample pressure transmission assembly 20 also includes a water-permeable member 27. There are two water-permeable members 27. The two water-permeable members 27 are arranged at intervals along the arrangement direction of the multiple soil sample pressure transmission assemblies 20 and are located on both sides of the soil sample 100, and one of the water-permeable members 27 is arranged in contact with the pressure transmission plate 22.

[0055] Specifically, the permeable member 27 is a permeable stone that matches the soil sample 100. The arrangement of the permeable stones on both sides of the soil sample 100 ensures the discharge of water from the soil sample 100 during pressurization. At the same time, the arrangement of the permeable member 27 also ensures that the force on the soil sample 100 is uniform to a certain extent.

[0056] like Figure 2 As shown, a sample inlet 211 is disposed at the top of the soil sample tube 21 , and the soil sample pressure transmission assembly 20 further includes a ring knife 26 , which is detachably disposed in the soil sample tube 21 through the sample inlet 211 .

[0057] Specifically, after the ring knife 26 completes sampling in the designated area, the ring knife 26 is placed vertically into the soil sample tube 21 through the sample insertion port 211. Keeping the ring knife 26 vertically arranged can ensure that the soil sample 100 in the ring knife 26 is only subjected to horizontal pressure, thereby avoiding compression and deformation of the soil sample 100 due to the deadweight of the pressure transmission plate 22. At the same time, placing the ring knife 26 in the soil sample pressure transmission assembly 20 facilitates the loading and replacement of the soil sample 100.

[0058] In this embodiment, the cross-sections of the pressure transmission plate 22 and the water-permeable member 27 are circular, and the size of the water-permeable member 27 connected to the pressure transmission plate 22 is adapted to the inner diameter of the soil sample 100 and is slightly smaller than the inner diameter of the ring knife 26, so that the water-permeable member 27 connected to the pressure transmission plate 22 can extend into the ring knife 26.

[0059] like Figure 2 As shown, the horizontal pressure consolidation apparatus further includes a slide rail 28 , which is extended along the arrangement direction of the plurality of soil sample pressure transmission assemblies 20 , and the bottom of the soil sample pressure transmission assembly 20 is slidably connected to the slide rail 28 .

[0060] Specifically, the slide rail 28 is arranged on the workbench 10 along the axial direction of the soil sample tube 21. The multiple soil sample tubes 21 are arranged on the slide rail 28 to achieve the same force deformation direction of the multiple soil sample pressure transmission components 20, and the arrangement of the slide rail 28 can reduce the friction between the soil sample pressure transmission component 20 and the workbench 10. At the same time, the design of the slide rail 28 makes the movement of the soil sample pressure transmission component 20 more stable, which is convenient for observing the deformation of the soil sample 100.

[0061] In this embodiment, the soil sample pressure transmission assembly 20 further includes a slider 29 , which is disposed at the bottom of the soil sample tube 21 and detachably connected to the soil sample tube 21 . The slider 29 cooperates with the slide rail 28 to enable the soil sample tube 21 to slide on the slide rail 28 .

[0062] In another embodiment of the present application which is not shown in the figure, a structure which is compatible with the slide rail 28 is provided at the bottom of the soil sample tube 21 , and the soil sample tube 21 is directly arranged on the slide rail 28 .

[0063] like Figure 2 As shown, the workbench 10 includes a bottom plate 11 and a vertical plate structure 12. The vertical plate structure 12 is vertically placed on the bottom plate 11 and together with the bottom plate 11, encloses a placement area for accommodating the soil sample pressure transmission assembly 20. The length of the adjustment member 40 extending into the placement area is adjustable, and at least a portion of the pushing mechanism 30 extends into the placement area through the sealing member 50 to push the soil sample pressure transmission assembly 20.

[0064] Specifically, the slide rail 28 is arranged on the base plate 11, and the vertical plate structure 12 is arranged on the base plate 11 to form a frame structure with a rectangular cross-section. One end of the adjusting member 40 is threadedly connected to the vertical plate structure 12, and the other end is abutted against the soil sample tube 21. By adjusting the depth of the adjusting member 40 extending into the vertical plate structure 12, multiple soil sample pressure transmission assemblies 20 can be exactly abutted head to tail, and at the same time, it is convenient to adjust the depth of the pressure transmission plate 22 extending into the soil sample tube 21.

[0065] like Figure 2 As shown, the push mechanism 30 includes a driving part 31, a push rod 32 and a pressure sensor 33. The driving part 31 is arranged on the bottom plate 11 and is located outside the placement area. The push rod 32 is connected to the driving part 31, and at least a part of the push rod 32 extends into the placement area through the sealing member 50 and abuts against the soil sample pressure transmission assembly 20. The pressure sensor 33 is arranged on the push rod 32 and is accommodated in the placement area of ​​the soil sample pressure transmission assembly 20, and is used to detect the pressure applied by the push rod 32.

[0066] Specifically, the driving part 31 may also be a pneumatic pressurizing device or a hydraulic pressurizing device.

[0067] In this embodiment, when the driving part 31 is an electric servo pressurizing device, the driving part 31 includes a control unit, a servo motor driver, a servo motor, a reducer, and a linear ball push rod. The control unit provides a control signal to the servo motor driver to control the operation of the servo motor, increase the torque through the reducer, and drive the linear ball push rod to move.

[0068] In this embodiment, there is one pushing mechanism 30, which is arranged on one side of the vertical plate structure 12. The driving part 31 is connected to the pressure transmission plate 22 of the soil sample pressure transmission assembly 20 close to the pushing mechanism 30 through the pushing rod 32. Of course, the driving part 31 can also be connected to the soil sample tube 21 of the soil sample pressure transmission assembly 20 close to the pushing mechanism 30 through the pushing rod 32.

[0069] In another embodiment of the present application not shown in the figure, there are two pushing mechanisms 30, which are located on both sides of the soil sample pressure transmission assembly 20 and are respectively connected to the soil sample tube 21 and the pressure transmission plate 22 of the soil sample pressure transmission assembly 20.

[0070] In this embodiment, a through hole is provided on the vertical plate structure 12, and the push rod 32 extends into the through hole and abuts against the pressure transmission plate 22 through the pressure sensor 33. The precise measurement capability of the pressure sensor 33 ensures the controllability of the pressurization process.

[0071] like Figure 2As shown, the horizontal pressure consolidation instrument also includes a sealing member 50, which is sleeved on the push rod 32. The sealing member 50 is used to seal the gap between the push rod 32 and the through hole. When water is injected between the vertical plate structure 12 and the bottom plate 11, the soil sample 100 is submerged in water, and water is prevented from flowing out of the through hole during the immersion test. After the immersion test is completed, the above-mentioned injected water is discharged through the drainage control member 13.

[0072] Of course, the above embodiment is only one structural form of a horizontal pressurized consolidation apparatus, and the horizontal pressurized consolidation apparatus may also have other structural forms.

[0073] In this embodiment, step five also includes fitting the data of the preset pressure and the moving distance into a curve.

[0074] Specifically, the preset pressure and moving distance are used as the X-axis and Y-axis respectively, and points are drawn and connected on the graph. In order to ensure the accuracy of data recording, the consolidation instrument that implements the horizontal pressurized consolidation method can be connected to an electronic display device to achieve real-time detection and real-time recording.

[0075] In this embodiment, step three further includes injecting water into the outer side of the soil sample tube 21 until the soil sample 100 is immersed in water.

[0076] Specifically, clean water is slowly injected at a side away from the soil sample 100, and the water flow rate is kept within a small range. Preferably, water is slowly injected along the inner wall of the soil sample tube 21, so as to avoid erosion of the soil sample 100 due to excessive water flow or excessive impact. Slowly injecting water at a position away from the soil sample 100 can achieve a slow rise in the water level until it covers the soil sample 100, so as to achieve the effect that the soil sample 100 is immersed in water but not eroded.

[0077] In this embodiment, step 2 further includes setting water-permeable members 27 at both ends of the soil sample 100 .

[0078] Specifically, the permeable member 27 includes two permeable stones. When adjusting the distance between the soil sample tube 21 and the pressure transmission plate 22, the two permeable stones are pre-placed at both ends of the soil sample 100, and then the ring knife sample is placed, and the distance between the soil sample tube 21 and the pressure transmission plate 22 is adjusted again to achieve the permeable stones fitting at both ends of the soil sample 100. The method of applying a preset pressure horizontally can avoid compression deformation of the soil sample 100 due to the dead weight of the permeable stones.

[0079] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the horizontal pressurized consolidation method includes: step one: preparing multiple knife ring specimens; step two: adjusting the size of the accommodation space formed by multiple soil sample tubes 21 and multiple pressure transmission plates 22 corresponding to the soil sample tubes 21, and placing multiple knife ring specimens and water-permeable parts 27 upright in the accommodation space in turn; step three: adjusting the distance between the multiple pressure transmission plates 22 and the soil sample tubes 21 through the slider 29, and making their axes horizontal and in a straight line; step four: applying a graded preset pressure to the soil sample 100 along the horizontal axis by the pushing mechanism 30, and the test pressure is accurately measured by the pressure sensor 33; step five: the soil sample 100 undergoes horizontal deformation under the action of pressure, and the moving distance information of each pressure transmission plate 22 is collected by the displacement sensor 24. A plurality of test specimens are prepared by using a plurality of ring cutters and the ring cutters are placed vertically in the accommodating space, and the distances between the plurality of soil sample tubes 21 and the pressure transmission plates 22 are adjusted, thereby realizing vertical placement and positioning of the plurality of soil samples 100, with each part in close and stable contact. When a preset pressure is applied to the pressure transmission plate 22, the pressure transmission plate 22 moves along the inner wall of the soil sample tube 21, thereby cooperating with the soil sample tube 21 to compress the soil sample 100. In this process, the pressure exerted on the soil sample 100 is horizontal pressure, and the pressure is transmitted between the plurality of soil samples 100, thereby completing the consolidation test of the plurality of soil samples 100. At the same time, compared with the traditional vertical pressure test, the present application can realize the consolidation test of a plurality of soil samples under one load, and there is no need to set a preload or a zero-point pressure, thereby avoiding deformation of the soil sample 100 before the test that affects the test results, and ultimately improving the efficiency and accuracy of the test.

[0080] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0081] It should be noted that the terms "upper", "lower", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A horizontal pressure consolidation test method, characterized in that: include: Step 1: Prepare multiple ring knife specimens; Step 2: adjusting the size of the accommodation space formed by the multiple soil sample tubes and the multiple pressure transmission plates corresponding to the soil sample tubes, and sequentially placing the multiple ring knife samples and the water-permeable parts upright in the accommodation space; Step 3: adjusting the distance between the plurality of pressure transmission plates and the soil sample tube by means of a slider, and making their axes horizontal and in a straight line; Step 4: The push mechanism applies a graded preset pressure to the soil sample along the horizontal axis, and the test pressure is accurately measured by the pressure sensor; Step 5: The soil sample undergoes horizontal deformation under pressure, and the movement distance information of each pressure transmission plate is collected through a displacement sensor.

2. The horizontal pressure consolidation test method according to claim 1, characterized in that: The step 2 also includes slidingly connecting the side walls of the plurality of soil sample tubes to the workbench and adjusting the opening direction of the soil sample tubes.

3. The horizontal pressure consolidation test method according to claim 2, characterized in that: In the step 2, the opening directions of the soil sample tubes are adjusted so that the openings of the plurality of soil sample tubes face the same direction or different directions.

4. The horizontal pressure consolidation test method according to claim 1, characterized in that: The step three also includes adjusting the relative positions of the plurality of soil sample tubes and the plurality of pressure transmission plates so that the plurality of soil sample tubes and the plurality of pressure transmission plates are coaxially arranged.

5. The horizontal pressure consolidation test method according to claim 1, characterized in that: The step 5 further includes obtaining the numerical information of the moving distance, and obtaining the pore ratio corresponding to different pressures according to the different displacement information corresponding to each graded pressure, wherein the pore ratio e i The calculation model is as follows: Where ei is the porosity ratio at a certain pressure level; ∑Δh i is the displacement of the sample under a certain level of pressure; h0 is the initial thickness of the sample.

6. The horizontal pressure consolidation test method according to claim 1, characterized in that: In the step 4, the construction force of the estimation mechanism is in the horizontal direction and can act on a plurality of soil samples at the same time.

7. The horizontal pressure consolidation test method according to claim 1, characterized in that: In the step 4, the preset pressure can be selectively applied from one side or both sides of the soil sample. If the preset pressure is applied from both sides of the soil sample, the same pressure must be applied simultaneously.

8. The horizontal pressure consolidation test method according to claim 1, characterized in that: The step five also includes fitting the data of the preset pressure and the moving distance into a curve.

9. The horizontal pressure consolidation test method according to claim 1, characterized in that: The step three also includes injecting water into the outer side of the soil sample tube until the soil sample is immersed in water.

10. The horizontal pressure consolidation test method according to any one of claims 1 to 9, characterized in that: The step 2 also includes setting the water-permeable members at both ends of the soil sample.

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