Compressive strength test device and method for soft soil solidified body

Abstract

The invention discloses a compressive strength test device and method for a soft soil solidified body, the compressive strength test device comprises a support, an upper pressing part and a lower pressing part, the upper pressing part is slidably arranged on the support along the vertical direction, the lower pressing part is fixed on the support, an upper pressing plate and a lower pressing plate are respectively arranged on the upper pressing part and the lower pressing part, the upper pressing plate is arranged right above the lower pressing plate, and the lower pressing plate is arranged right above the lower pressing plate. A plurality of sliding rails are arranged on the lower pressing plate, the sliding rails are distributed in a circumferential array mode with the center position of the lower pressing plate as the circle center, the sliding rails are distributed in a divergent mode from the center of the lower pressing plate to the periphery, a side pressing block is arranged on each sliding rail in a sliding mode, and a first driving component is arranged on the support. And a first elastic assembly is arranged between the first driving part and each side pressing block. The purpose of the invention is to solve the technical problems that the measured value is lower than the actual value due to the unbalance loading effect and the measured value is lower than the actual value due to the lack of transverse deformation constraint of the to-be-measured solidified soil body.

Description

Technical Field

[0001] The invention belongs to the technical field of compressive strength detection, and in particular relates to a compressive strength test device and method for soft soil solidification bodies. Background Art

[0002] After soil solidification with a soft soil solidifier, compressive strength testing is a key step in evaluating the effectiveness of the solidification process. The core drilling method, a core testing method, requires a systematic analysis of its operating principles and limitations. This method involves drilling cylindrical core samples from the solidified soil, grinding the end surfaces, and then performing a compressive test on a press to obtain the compressive strength value. However, this testing method has the following two drawbacks: 1. System deviation caused by eccentric load effect: Existing testing equipment relies on manual alignment, making it difficult to ensure that the load action line coincides with the geometric center of the solidified soil being tested. When eccentric loading occurs, non-uniform stress distribution occurs across the cross-section of the solidified soil being tested, with the maximum compressive stress concentrated at the edge of the deviated side (causing stress concentration), leading to premature localized material failure. Because the failure mode shifts from uniform compression to localized shear failure, the measured peak load is lower than the material's actual bearing capacity, resulting in a compressive strength value that is lower than the actual strength value.

[0003] 2. Measurement distortion caused by lateral constraint differences: During compression tests, the solidified soil under axial load undergoes lateral expansion and deformation due to the Poisson effect. However, in real-world conditions, the solidified soil is tightly enclosed by surrounding soil, constraining its lateral deformation. This constraint acts as a passive confining pressure, increasing its compressive strength. However, when the testing machine performs the compressive strength test, the solidified soil is not constrained in its lateral deformation, resulting in a measured compressive strength value that is lower than the actual strength value. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a compressive strength testing device and method for soft soil solidification bodies, so as to solve the technical problems that the measured values are lower than the actual values due to the off-center loading effect and the lack of lateral deformation constraint of the solidified soil to be tested, resulting in the measured values being lower than the actual values.

[0005] One of the present inventions: To achieve the aforementioned object of the invention, the technical solution adopted by the present invention includes: a compressive strength test device for soft soil solidified body, comprising a bracket, an upper pressing part and a lower pressing part, the upper pressing part being slidably arranged on the bracket along the vertical direction, the lower pressing part being fixed on the bracket, an upper pressing plate and a lower pressing plate being respectively provided on the upper pressing part and the lower pressing part, the upper pressing plate being provided just above the lower pressing plate, a plurality of sliding tracks being provided on the lower pressing plate, the plurality of sliding tracks being distributed in a circular array with the center position of the lower pressing plate as the center of the circle, and the plurality of sliding tracks being distributed in a divergent shape from the center of the lower pressing plate to the surrounding areas, and a side pressure block being slidably configured on each of the sliding tracks; The bracket is provided with a first driving component for driving a plurality of side pressure blocks to slide synchronously on the lower pressure plate, and a first elastic component is provided between the first driving component and each side pressure block.

[0006] Compared with the prior art, the advantages of the present invention include: (1) The present invention provides a compressive strength test device for soft soil solidification, which drives multiple side pressure blocks to move toward the center of the lower pressure plate through a first driving component. During the moving-together process, the side pressure blocks contact the solidified soil to be tested and push it to the center of the lower pressure plate. In this way, when the solidified soil to be tested is subjected to pressure, the stress in its cross section can be evenly distributed, reducing the possibility of a low compressive strength value being measured due to an eccentric load effect, thereby improving the accuracy of the test; (2) The present invention provides a compressive strength test device for a soft soil solidified body. In the process of the first driving component driving the multiple side pressure blocks to move toward the center position of the lower pressure plate, the first elastic component will undergo elastic deformation and apply lateral pressure to the solidified soil body. This can simulate the situation in which the solidified soil body is tightly wrapped by the surrounding soil in the actual environment, so that the solidified soil body to be tested is subject to lateral constraints corresponding to the actual situation, reducing the possibility of the measured compressive strength value being low due to the difference in lateral constraints, and improving the accuracy of the test; In addition, in actual situations, when solidified soil is compressed and laterally deformed, the greater the degree of deformation, the greater the degree of constraint. In this solution, the greater the degree of lateral deformation of the solidified soil to be tested, the greater the elastic deformation of the first elastic component, that is, the greater the lateral pressure applied. This further adapts to the lateral constraints in actual situations and further improves the accuracy of the test. (3) The present invention provides a compressive strength test device for soft soil solidification bodies. By presetting the elastic deformation length of the first elastic component, the lateral pressure applied by the lateral pressure block to the solidified soil body to be tested can be changed, thereby realizing the compressive strength test of the solidified soil body to be tested under different lateral pressures.

[0007] (4) The present invention provides a compressive strength test device for soft soil solidification. When the solidified soil expands laterally, the lateral pressure exerted by multiple lateral pressure blocks will cause the solidified soil to have a centripetal contraction tendency, thereby reducing the possibility of soil blocks splashing when the solidified soil expands laterally under pressure and breaks. This not only reduces the risk of injury due to soil block splashing, but also reduces the subsequent cleaning trouble caused by soil block splashing; In addition, the side pressure blocks also have a blocking effect, further reducing the possibility of soil splashing.

[0008] Furthermore, the first elastic component is provided with a first scale for measuring the elastic deformation length of the first elastic component.

[0009] Furthermore, the upper pressing plate and the upper pressing portion are connected via a second elastic component, and the second elastic component is provided with a second scale for measuring the elastic deformation length of the second elastic component.

[0010] Furthermore, an opening is provided at the center of the lower pressing plate for the passage of the solidified soil to be tested, the opening penetrates the lower pressing plate along the thickness direction of the lower pressing plate, a cover plate for closing the opening is slidably provided at the bottom of the lower pressing plate, and a second driving component for pushing the cover plate to slide is provided on the bracket; The side pressure block is arranged along the vertical direction, and the inner side of the side pressure block has a pressing surface that is against the side surface of the solidified soil to be tested. The pressing surface is an arc-shaped surface, and the upper pressure plate is a truncated cone-shaped structure with a small upper part and a large lower part. When the upper pressure plate is located on the inner side of the side pressure block, the bottom edge of the upper pressure plate contacts the pressing surface.

[0011] Furthermore, the compressive strength test device further includes a laser sensor and a controller. The laser sensor includes a laser emitter, a receiver, and a processor. The processor is connected to the controller signal. The laser emitter is provided on the upper pressing plate, the receiver is provided on the lower pressing plate, and the side pressing block has a reference position for completing the compressive strength test. When the upper pressure plate moves downward from above the side pressure block to the reference position, the laser emitted by the laser transmitter is projected onto the receiver through the space between the adjacent pressure blocks on both sides. The processor transmits this signal to the controller, and the controller controls the second driving component to operate so that the cover slides to open the opening. When the upper pressure plate moves upward from below the side pressure block to the reference position, the laser emitted by the laser transmitter is again projected onto the receiver through the space between the adjacent pressure blocks on both sides. The processor transmits this signal to the controller, and the controller controls the second driving component to operate so that the cover slides to close the opening.

[0012] The second invention: A compressive strength test method specifically comprises the following steps: Step 1: placing the processed solidified soil to be tested on the lower pressing plate, and making the solidified soil to be tested be located inside the multiple side pressing blocks; Step 2: Start the first driving component to make the multiple side pressure blocks synchronously move toward the center of the lower pressure plate. During the moving process, the side pressure blocks contact the solidified soil to be tested and push the solidified soil to be tested to move so that it is located at the center of the lower pressure plate. At the same time, the first elastic component elastically deforms and applies lateral pressure to the solidified soil to be tested. Step 3: Move the upper pressure part downward, and the upper pressure plate moves downward synchronously to apply pressure to the solidified soil to be tested. When the side pressure block moves away from the center position of the lower pressure plate due to the lateral expansion of the solidified soil to be tested, record the elastic deformation of the second elastic component to determine the applied pressure; Step 4: Start the second driving component to slide the cover plate to open the opening, and continue to move the upper pressing part downward until the upper pressing part is located below the side pressing block. The solidified soil to be tested is discharged downward through the opening under the push of the upper pressing plate; Step 5: Move the upper pressing part downward so that the upper pressing part returns to its original position.

[0013] Furthermore, between step 1 and step 2, the elastic deformation length of the first elastic component is predetermined to determine the lateral pressure applied by the lateral pressure block to the solidified soil to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 Schematic diagram of the structure of an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure; Figure 3 for Figure 2 Schematic diagram of the enlarged structure at A in the middle; Figure 4 Schematic diagram of the structure of the lower pressure part Figure 1 ; Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure; Figure 6 Schematic diagram of the structure of the lower pressure part Figure 2 .

[0016] Reference numerals: Bracket 1, sliding frame 2, upper pressure plate 3, hydraulic propulsion system 4, sliding rail 5, mounting block 6, first spring 7, first rod 8, second rod 9, support ring 10, support column 11, rotating ring 12, moving column 13, screw 14, first connector 15, second connector 16, first scale 17, second spring 18, third rod 19, fourth rod 20, second scale 21, cover plate 22, lower pressure plate 23, hydraulic push rod 24, pressing surface 25, transmitter 26, receiver 27, side pressure block 28, solidified soil to be tested 29. DETAILED DESCRIPTION

[0017] In view of the deficiencies in the prior art, the inventors of this case have proposed the technical solution of the present invention after long-term research and extensive practice. The following will further explain the technical solution, its implementation process and principles, etc. in conjunction with the drawings in the embodiments of this application and specific implementation cases.

[0018] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention. The embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, the present invention covers any substitution, modification, equivalent method and scheme made within the spirit, principle and scope of the present invention defined by the claims. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] In the description of this application, "first", "second", "third" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "a" or "an" and other similar words do not indicate a quantity limitation, but rather indicate the existence of at least one. "Include" or "comprising" and other similar words mean that the elements or objects appearing before "include" or "comprising" include the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0020] In the description of this application, the terms "center," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this application. Furthermore, when positional terms such as "both sides," "outside," "upper," and "lower" are used, they should be understood to be used solely to facilitate understanding and description, taking into account that the structure may be oriented in other directions.

[0021] In the description of this application, unless otherwise clearly specified and limited, the technical or scientific terms used should have the usual meanings understood by persons with ordinary skills in the field to which this application belongs. Terms such as "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection, or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] One of the present inventions: See also Figure 1-6 The present invention provides a technical solution: a compressive strength test device for soft soil solidification body, see Figure 1 , including a bracket 1, an upper pressing part and a lower pressing part. The upper pressing part is slidably arranged on the bracket 1 along the vertical direction. The lower pressing part is fixed on the bracket 1, and an upper pressing plate 3 and a lower pressing plate 23 are respectively provided on the upper pressing part and the lower pressing part. The upper pressing plate 3 is arranged directly above the lower pressing plate 23. In this embodiment, the upper pressing plate and the lower pressing plate are both circular plate-shaped structures, and the upper pressing plate 3 is located directly above the lower pressing plate 23, that is, the upper pressing plate 3 and the lower pressing plate 23 are coaxially arranged.

[0023] Specifically, the upper pressure part includes a sliding frame 2, which is arranged on the bracket 1 for sliding along the vertical direction, and the upper pressure plate 3 is arranged below the sliding frame 2. A hydraulic propulsion system 4 is arranged between the sliding frame 2 and the bracket 1. The hydraulic propulsion system 4 can push the sliding frame 2 to slide up and down along the vertical direction, thereby synchronously driving the upper pressure plate 3 to slide up and down.

[0024] See Figure 2-6 The lower platen 23 is provided with a plurality of sliding rails 5. The plurality of sliding rails 5 are arranged in a circular array with the center of the lower platen 23 as the center, and the plurality of sliding rails 5 are distributed in a divergent manner from the center of the lower platen 23 to the surrounding areas. Each sliding rail 5 is slidably provided with a side pressure block 28. Specifically, the sliding rail 5 is a chute provided at the top of the lower platen 23, with a slider provided in the chute, which is connected to the side pressure block 28; alternatively, the sliding rail 5 is a bar-shaped slide rail with a slider provided on the bar-shaped slide rail, which is connected to the side pressure block 28.

[0025] See Figure 2-3 Or 5, each side pressure block 28 is provided with a first elastic component. Specifically, the first elastic component is provided between the slider and the side pressure block 28. The first elastic component includes a vertically arranged mounting block 6. The bottom of the mounting block 6 is fixedly connected to the top of the slider. A horizontal first spring 7 is provided between the mounting block 6 and the side pressure block 28. One end of the first spring 7 is fixedly connected to the mounting block 6, and the other end is fixedly connected to the side pressure block 28. A first rod 8 and a second rod 9 are provided inside the first spring 7. The first rod 8 is a hollow tubular structure with open ends. The second rod 9 is inserted into the first rod 8. The end of the first rod 8 away from the second rod 9 is fixedly connected to the side pressure block 28, and the end of the second rod 9 away from the first rod 8 is fixedly connected to the mounting block 6.

[0026] The bracket 1 is provided with a first driving component for driving multiple side pressure blocks 28 to slide synchronously on the lower pressure plate 23. Specifically, the first driving component includes a support ring 10, a rotating ring 12, and a driving structure for driving the rotating ring 12 to rotate. The support ring 10 is fixed above the lower pressure plate 23 by a support column 11. The side pressure blocks 28 are located on the inner side of the support ring 10. The support ring 10 and the lower pressure plate 23 are arranged coaxially. The support ring 10 is provided with a first through hole that is compatible with the number and position of the slide grooves. In other words, the first through hole is consistent with the number of the slide grooves and the length direction is also consistent. A movable column 13 is provided in the first through hole. One end of the movable column 13 is fixedly connected to the top of the mounting block 6, and the other end extends upward to pass through the first through hole. The rotating ring 12 is rotatably mounted on the support ring 10 and is coaxially disposed with the support ring 10. A second through-hole is provided on the rotating ring 12. The second through-hole is strip-shaped and inclined. The upward end of the movable post 13 extends upward through the second through-hole, and the movable post 13 is capable of sliding within the second through-hole. By rotating the rotating ring 12, the movable post 13 causes the mounting block 6 to slide along the length of the chute, thereby causing the multiple side pressure blocks 28 to move synchronously toward or away from the center of the lower pressure plate 23.

[0027] The propulsion structure can be a hydraulic push rod 24 or an electric push rod. The telescopic end of the propulsion structure is hinged to the rotating ring 12, and the other end is hinged to the bracket 1. In this embodiment, the propulsion structure includes a screw 14, one end of which is rotatably provided with a first connector 15. The first connector 15 is hinged to the rotating ring 12. The screw 14 is sleeved with a second connector 16. The second connector 16 is connected to the screw 14 through a threaded fit, and the second connector 16 is hinged to the bracket 1. By rotating the screw 14, the rotating ring 12 can be pulled to rotate. Since the first connector 15 is hinged to the rotating ring 12 and the second connector 16 is hinged to the bracket 1, when the screw 14 is rotated to rotate the rotating ring 12, the first connector 15 and the second connector 16 will also rotate to a certain extent accordingly.

[0028] When the above plan is implemented: ①. Drive multiple side pressure blocks 28 toward the center of the lower pressure plate 23 through the first driving component. During the approaching process, they come into contact with the solidified soil 29 to be tested and push it to the center of the lower pressure plate 23. In this way, when the solidified soil 29 to be tested is under pressure, the stress in its cross section can be evenly distributed, reducing the possibility of a low measured compressive strength value due to the off-center load effect, thereby improving the accuracy of the test.

[0029] ②. In the process of the first driving component driving the multiple side pressure blocks 28 to move toward the center of the lower pressure plate 23, after the side pressure blocks 28 abut against the solidified soil 29 to be tested, the side pressure blocks 28 continue to move toward the center of the lower pressure plate, which will cause the first elastic component to elastically deform, thereby applying lateral pressure to the solidified soil 29 to be tested. This can simulate the situation in which the solidified soil 29 to be tested is surrounded by soil in an actual environment, so that the solidified soil 29 to be tested is subject to lateral constraints corresponding to the actual situation, thereby reducing the possibility of a low measured compressive strength value due to differences in lateral constraints, and improving the accuracy of the test; In addition, in actual situations, when the solidified soil body 29 to be tested is compressed and deformed laterally, the greater the degree of deformation, the greater the degree of constraint. In this solution, the greater the degree of lateral deformation of the solidified soil body 29 to be tested, the further the elastic deformation of the first elastic component will increase, and the greater the lateral pressure applied, thereby further adapting to the lateral constraints in actual situations and further improving the accuracy of detection.

[0030] ③. By presetting the elastic deformation length of the first elastic component, the lateral pressure applied by the lateral pressure block 28 to the solidified soil body 29 to be tested can be changed, thereby achieving compression resistance testing of the solidified soil body 29 to be tested under different lateral pressures.

[0031] ④ When the solidified soil expands laterally, the lateral pressure exerted by the multiple lateral pressure blocks 28 will cause the solidified soil 29 to have a centripetal contraction tendency, thereby reducing the possibility of soil blocks splashing when the solidified soil 29 to be tested expands laterally under pressure and ruptures. This not only reduces the risk of injury due to soil block splashing, but also reduces the subsequent cleaning trouble caused by soil block splashing; In addition, the side pressure blocks 28 also have a blocking effect, which also reduces the possibility of soil splashing.

[0032] In this embodiment, the first elastic component is provided with a first scale 17 for measuring the length of the elastic deformation of the first elastic component. Specifically, first scale 17 is provided on second rod 9 and extends along the length of second rod 9. First scale 17 can be used to measure the elastic deformation of the first elastic component, and the corresponding elastic force can be calculated according to Hooke's law.

[0033] See Figure 3 In this embodiment, the upper pressure plate and the upper pressure portion are connected via a second elastic component, and the second elastic component is provided with a second scale 21 for measuring the elastic deformation length of the second elastic component. Specifically, the second elastic component includes a second spring 18, a third rod 19, and a fourth rod 20. The third rod 19 and the fourth rod 20 are arranged inside the first spring 7. The third rod 19 is a hollow tubular structure with open ends. The fourth rod 20 is inserted into the third rod 19. The end of the third rod 19 away from the fourth rod 20 is fixedly connected to the sliding frame 2, and the end of the fourth rod 20 away from the third rod 19 is fixedly connected to the upper pressure plate 3. One end of the second spring 18 is fixedly connected to the upper pressure plate 3, and the other end is fixedly connected to the third rod 19. The second scale 21 is provided on the fourth rod 20 and is arranged along the length direction of the fourth rod 20. The elastic deformation of the second elastic component can be measured by the second scale 21 , and the corresponding elastic force can be calculated according to Hooke's law. The elastic force is the pressure applied to the solidified soil 29 to be measured.

[0034] See Figure 4-5 In this embodiment, an opening is provided at the center of the lower pressing plate 23 for the passage of the solidified soil 29 to be tested. The opening extends through the lower pressing plate 23 along its thickness. A cover plate 22 is provided at the bottom of the lower pressing plate 23 for slidingly closing the opening. A second driving component is provided on the bracket 1 for pushing the cover plate 22 to slide. Specifically, the second driving component is a hydraulic push rod 24, which is provided along the sliding direction of the cover plate 22. The telescopic end of the hydraulic push rod 24 is fixedly connected to the cover plate 22, and the other end is fixedly connected to the bracket 1. When the compressive strength test is completed (i.e., when the side pressure block 28 is affected by the lateral expansion of the solidified soil 29 to be tested and moves a certain distance away from the center of the lower pressing plate 23), the second driving component is activated, causing the cover plate 22 to slide to open the opening, and the solidified soil 29 to be tested is discharged downward from the opening. After the solidified soil 29 to be tested is discharged, the second driving component is restarted, causing the cover plate 22 to slide to close the opening.

[0035] Furthermore, a collecting trough is provided below the opening, and the collecting trough is used to centrally receive the solidified soil 29 to be tested discharged from the opening, thereby facilitating subsequent centralized processing.

[0036] See Figure 3 Or 5, the side pressure block 28 is arranged along the vertical direction, and the inner side of the side pressure block 28 has a pressing surface 25 that abuts against the side surface of the solidified soil body 29 to be tested. The pressing surface 25 is an arc surface that adapts to the outer wall of the cylindrical solidified soil body 29 to be tested, thereby increasing the contact area between the side pressure block 28 and the solidified soil body 29 to be tested, thereby further improving the simulation effect of the solidified soil body being wrapped by the surrounding soil body. Figure 3The upper pressing plate 3 is a truncated cone-shaped structure that is smaller at the top and larger at the bottom, forming a tapered structure. When the upper pressing plate 3 is located inside the side pressing block 28, the bottom edge of the upper pressing plate 3 contacts the pressing surface 25, that is, the cross-sectional shape and size of the upper pressing plate 3 and the solidified soil mass 29 to be tested are consistent. After the upper pressing plate 3 pushes the solidified soil mass 29 to be tested out of the opening and moves upward to restore its original state, the bottom edge of the upper pressing plate 3 contacts the inside of the side pressing block 28, thereby scraping away soil debris inside the side pressing block 28.

[0037] The truncated cone structure of the upper pressure plate 3 allows the soil debris adhered to the upper pressure plate 3 to slide downward along the inclined surface of the truncated cone structure, making it difficult for it to adhere to the upper pressure plate 3. In addition, since the solidified soil 29 to be tested has been cleared from the opening when the upper pressure plate 3 moves downward and passes under the side pressure block 28, the side pressure block 28 will now move closer to the center of the lower pressure plate 23 under the elastic force of the first elastic component. The truncated cone design will enable the side pressure block 28 to slide along the inclined surface of the upper pressure plate 3 away from the center of the lower pressure plate 23 during the subsequent upward movement of the upper pressure plate 3, and the upper pressure plate 3 will be located on the inner side of the side pressure block 28 again, and under the action of the first elastic component, the pressing surface 25 of the side pressure block 28 will contact the bottom edge of the upper pressure plate 3 to facilitate subsequent cleaning work.

[0038] See Figure 2-3 In this embodiment: the compressive strength testing device also includes a laser sensor and a controller. The laser sensor includes a laser emitter 26, a receiver 27 and a processor. The processor is connected to the controller signal. The laser emitter 26 is set on the upper pressure plate 3, the receiver 27 is set on the lower pressure plate 23, and the side pressure block 28 has a reference position for completing the compressive strength test.

[0039] When the upper pressure plate 3 moves downward from above the side pressure block 28 to the reference position, the laser emitted by the laser emitter 26 is projected onto the receiver 27 through the space between the adjacent two side pressure blocks 28. The processor transmits this signal to the controller, and the controller controls the second driving component to operate to make the cover 22 slide to open the opening. Since the first elastic component is in an elastically stressed state, it can push the upper pressure plate 3 to continue to move downward so that the solidified soil 29 to be tested is discharged from the opening. It should also be noted that if the elastic force of the first elastic component is not enough to completely discharge the solidified soil 29 to be tested from the opening, it is necessary to continue to move the upper pressure part downward so that the solidified soil 29 to be tested is completely discharged from the opening.

[0040] When the upper pressure plate 3 moves upward from below the side pressure blocks 28 to the reference position, the laser light emitted by the laser emitter 26 is projected onto the receiver 27 again through the space between the adjacent side pressure blocks 28. The processor transmits this signal to the controller, which controls the second drive component to operate and slide the cover plate 22 to close the opening. This arrangement forms an integrated system for pressure measurement and discharge. After the pressure measurement is completed, the solidified soil 29 to be tested is automatically discharged, which reduces the workload of the operator in cleaning the solidified soil 29 to be tested and makes the operation more convenient.

[0041] The second invention: A compressive strength test method specifically comprises the following steps: Step 1: Place the processed solidified soil 29 to be tested (the specific processing process is: first, use a drill to drill a cylindrical sample core in the area where the soil is solidified with a soft soil solidifying agent, and then use a sander to grind the end surface of the sample core to obtain the solidified soil 29 to be tested) on the lower pressing plate 23, so that the solidified soil 29 to be tested is located inside the multiple side pressing blocks 28; The elastic deformation length of the first elastic component is predetermined to determine the lateral pressure applied by the lateral pressure block 28 to the solidified soil body 29 to be tested. The elastic deformation length of the first elastic component can be determined according to the different lateral constraint strengths applied around the solidified soil body 29 to be tested (for example, different soils have different curing effects of soft soil curing agents; a soil with a good curing effect has a stronger lateral constraint force, while a soil with a poor curing effect has a weaker lateral constraint force). In addition, the compressive strength of the solidified soil body 29 to be tested under different lateral constraint conditions can also be measured.

[0042] Step 2: Start the first driving component to make multiple side pressure blocks 28 move synchronously toward the center position of the lower pressure plate 23. During the moving-together process, they contact the solidified soil 29 to be tested and push the solidified soil 29 to be tested to move so that it is located at the center position of the lower pressure plate 23. At the same time, after the side pressure blocks 28 contact the solidified soil 29 to be tested, continue to start the first driving component to make the first elastic component elastically deform. The first elastic component applies lateral pressure to the solidified soil 29 to be tested through elastic deformation.

[0043] Step 3: Move the upper pressure part downward, and the upper pressure plate 3 moves downward synchronously to apply pressure to the solidified soil 29 to be tested. When the side pressure block 28 is affected by the lateral expansion of the solidified soil 29 to be tested and moves away from the center position of the lower pressure plate 23, the elastic deformation of the second elastic component is recorded to determine the applied pressure.

[0044] Step 4: Start the second driving component to slide the cover plate 22 to open the opening, and continue to move the upper pressing part downward until it is located below the side pressing block 28. The solidified soil 29 to be tested is discharged downward through the opening under the push of the upper pressing plate 3.

[0045] Step 5: Move the upper pressing part downward so that the upper pressing part returns to its original position.

[0046] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make some simple deductions or substitutions without departing from the concept of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A compressive strength test device for soft soil solidification, comprising a bracket, an upper pressing portion, and a lower pressing portion, wherein the upper pressing portion is slidably mounted on the bracket along a vertical direction, and the lower pressing portion is fixed to the bracket, and an upper pressing plate and a lower pressing plate are respectively provided on the upper pressing portion and the lower pressing portion, wherein the upper pressing plate is arranged directly above the lower pressing plate, and wherein: The lower pressing plate is provided with a plurality of sliding tracks, which are distributed in a circular array with the center position of the lower pressing plate as the center, and the plurality of sliding tracks are distributed in a divergent shape from the center of the lower pressing plate to the surrounding areas, and each of the sliding tracks is slidably configured with a side pressure block; The bracket is provided with a first driving component for driving a plurality of side pressure blocks to slide synchronously on the lower pressure plate, and a first elastic component is provided between the first driving component and each side pressure block.

2. The compressive strength testing device for soft soil solidification according to claim 1, characterized in that: The first elastic component is provided with a first scale for measuring the elastic deformation length of the first elastic component.

3. The compressive strength testing device for soft soil solidification according to claim 2, characterized in that: The upper pressing plate and the upper pressing portion are connected via a second elastic component, and the second elastic component is provided with a second scale for measuring the elastic deformation length of the second elastic component.

4. The compressive strength testing device for soft soil solidification according to claim 3, characterized in that: An opening is provided at the center of the lower pressing plate for the passage of the solidified soil to be tested, and the opening penetrates the lower pressing plate along the thickness direction of the lower pressing plate. A cover plate for closing the opening is slidably provided at the bottom of the lower pressing plate, and a second driving component for pushing the cover plate to slide is provided on the bracket; The side pressure block is arranged along the vertical direction, and the inner side of the side pressure block has a pressing surface that is against the side surface of the solidified soil to be tested. The pressing surface is an arc-shaped surface, and the upper pressure plate is a truncated cone-shaped structure with a small upper part and a large lower part. When the upper pressure plate is located on the inner side of the side pressure block, the bottom edge of the upper pressure plate contacts the pressing surface.

5. The compressive strength testing device for soft soil solidification according to claim 4, characterized in that: A cleaning strip is provided at the bottom of the upper pressing plate, and the cleaning strip is provided around the bottom edge of the upper pressing plate.

6. The compressive strength testing device for soft soil solidification according to claim 5, characterized in that: The compressive strength test device also includes a laser sensor and a controller. The laser sensor includes a laser emitter, a receiver, and a processor. The processor is connected to the controller by signal. The laser emitter is arranged on the upper pressing plate, and the receiver is arranged on the lower pressing plate. The side pressing block has a reference position for completing the compressive strength test. When the upper pressure plate moves downward from above the side pressure block to the reference position, the laser emitted by the laser transmitter is projected onto the receiver through the space between the adjacent pressure blocks on both sides. The processor transmits this signal to the controller, and the controller controls the second driving component to operate so that the cover slides to open the opening. When the upper pressure plate moves upward from below the side pressure block to the reference position, the laser emitted by the laser transmitter is again projected onto the receiver through the space between the adjacent pressure blocks on both sides. The processor transmits this signal to the controller, and the controller controls the second driving component to operate so that the cover slides to close the opening.

7. A compressive strength test method, characterized in that: The compressive strength testing device according to claim 6 specifically comprises the following steps: Step 1: placing the processed solidified soil to be tested on the lower pressing plate, and making the solidified soil to be tested be located inside the multiple side pressing blocks; Step 2: Start the first driving component to make the multiple side pressure blocks synchronously move toward the center of the lower pressure plate. During the moving process, the side pressure blocks contact the solidified soil to be tested and push the solidified soil to be tested to move so that it is located at the center of the lower pressure plate. At the same time, the first elastic component elastically deforms and applies lateral pressure to the solidified soil to be tested. Step 3: Move the upper pressure part downward, and the upper pressure plate moves downward synchronously to apply pressure to the solidified soil to be tested. When the side pressure block moves away from the center position of the lower pressure plate due to the lateral expansion of the solidified soil to be tested, record the elastic deformation of the second elastic component to determine the applied pressure; Step 4: Start the second driving component to slide the cover plate to open the opening, and continue to move the upper pressing part downward until the upper pressing part is located below the side pressing block. The solidified soil to be tested is discharged downward through the opening under the push of the upper pressing plate; Step 5: Move the upper pressing part downward so that the upper pressing part returns to its original position.

8. A compressive strength test method according to claim 7, characterized in that: Between step 1 and step 2, the elastic deformation length of the first elastic component is predetermined to determine the lateral pressure applied by the lateral pressure block to the solidified soil to be tested.

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