Undisturbed-remolded soil composite preparation device

Abstract

The utility model discloses an undisturbed-remolded soil composite preparation device. The undisturbed-remolded soil composite preparation device comprises a motor and transmission assembly, an undisturbed soil sample preparation assembly, a remolded soil sample preparation assembly and a frame, the motor and the transmission assembly are connected to the upper frame, the lower end of the motor vertically penetrates into the upper frame, and the motor can move front and back in the horizontal direction. The position corresponds to the undisturbed soil sample preparation assembly when moving to the rear end, and the position corresponds to the remolded soil sample preparation assembly when moving to the front end; the undisturbed soil sample preparation assembly comprises an undisturbed soil sample preparation rod piece and a cutting blade from top to bottom, the motor is connected with the undisturbed soil sample preparation rod piece when moving to the rear end, and the motor is used for driving the undisturbed soil sample preparation rod piece to rotate; the remolded soil sample preparation assembly comprises a remolded soil sample preparation rod piece, a mold fixing part and a bearing seat from top to bottom, and the motor is connected with the remolded soil sample preparation rod piece when moving to the front end. According to the device, a semi-automatic preparation process is adopted, and high-precision cutting and standardized compaction technologies are combined, so that the preparation efficiency is improved, and meanwhile, errors in manual operation are remarkably reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of geotechnical testing devices, specifically relating to a device for preparing undisturbed-remolded soil composites. Background Technology

[0002] In geotechnical testing within the field of building engineering, the sample preparation process and mechanical property testing of undisturbed and remolded soils are core technical means for evaluating the engineering properties of soil. Regarding the preparation of undisturbed soil samples, the core technical requirement is to preserve the natural structure and original physical state of the soil to the greatest extent possible, so as to truly reflect the mechanical response characteristics of the soil in its undisturbed state. The preparation process can be systematically divided into two stages: field sampling and laboratory processing. The traditional manual cutting process used in the laboratory processing stage has significant technical defects: manually controlling the cutting tool during the cutting process can easily cause irreversible damage to the original structure of the soil, leading to deviations in key parameters such as the porosity and water content of the sample, thus directly affecting the reliability of the test data.

[0003] The preparation process for remolded soil samples aims to simulate the structural remodeling process of soil under engineering disturbance. The standard preparation procedure includes three steps: first, soil sample pretreatment (including crushing, sieving, and moisture content adjustment); second, layered filling; and finally, structural remodeling through compaction and disturbance treatment. In current processes, the layered filling stage often relies on manual compaction or specialized compaction equipment, which presents two technical problems: first, the interconnectedness of multiple steps significantly increases operational complexity, affecting preparation efficiency; second, the operator's force intensity and compaction frequency are difficult to standardize and control during manual compaction, easily leading to uneven density distribution and abnormal moisture content gradients within the sample. These structural differences directly cause deviations in experimental data, reducing the engineering guidance value of the research results. Utility Model Content

[0004] This utility model provides a virgin-reconstituted soil composite equipment device, the purpose of which is to provide a standardized device for preparing virgin soil and reconstituted soil, so as to reduce the error of manual operation.

[0005] Therefore, the present invention adopts the following technical solution:

[0006] A device for preparing undisturbed and remolded soil composites includes a motor and transmission assembly, an undisturbed soil sample preparation assembly, a remolded soil sample preparation assembly, and a frame;

[0007] The frame consists of two layers: a lower frame and an upper frame. The lower frame includes a top plate, a left side plate, a right side plate, and a bottom plate. The upper frame includes a top plate, a left side plate, and a right side plate. The lower frame is fixed to the ground, and the upper frame is horizontally fixed to the top of the lower frame.

[0008] The motor and transmission assembly are connected to the upper frame. The lower end of the motor is vertically inserted into the upper frame. The motor can move back and forth in the horizontal direction. When it moves to the rear end, the position corresponds to the original soil sample preparation assembly. When it moves to the front end, the position corresponds to the remolded soil sample preparation assembly.

[0009] The undisturbed soil sample preparation assembly consists of a undisturbed soil sample preparation rod and a cutting blade from top to bottom. When the motor moves to the rear end, it connects to the undisturbed soil sample preparation rod, and the motor is used to drive the undisturbed soil sample preparation rod to rotate. The cutting blade is located on the bottom plate of the lower frame, and the position of the cutting blade can be moved to meet the cutting requirements of samples of different sizes.

[0010] The remolded soil sample preparation assembly consists of a remolded soil sample preparation rod, a mold fixing part, and a support from top to bottom. When the motor moves to the front end, it connects to the remolded soil sample preparation rod. The lower end of the remolded soil sample preparation rod is connected to a vertical screw nut component. The lower end of the screw nut component is connected to a vertical compaction rod. The lower end of the compaction rod is connected to a compaction and disturbance part. The mold fixing part and the support are fixed on the base plate directly below the compaction rod. When the motor shaft rotates, the screw nut component drives the compaction rod to move downward or upward.

[0011] Furthermore, the frame comprises two layers, namely a lower frame and an upper frame, each frame being rectangular box-shaped, with the lower frame being larger than the upper frame. The lower frame includes a top plate, a left side plate, a right side plate, and a bottom plate, while the upper frame includes a top plate, a left side plate, and a right side plate. Both the front and rear ends of the lower and upper frames are open structures, facilitating equipment installation. The lower frame is fixed to the ground, and the upper frame is horizontally fixed to the top of the lower frame, with the opening ends of the lower and upper frames facing the same direction.

[0012] Furthermore, the motor and transmission assembly includes a motor, a motor slide rail, and a transmission rod; the motor slide rail is horizontally mounted on the top plate of the upper frame, and the lower end of the motor is vertically inserted into the upper frame; the motor slide rail can drive the motor to move horizontally to the target position.

[0013] Furthermore, the undisturbed soil sample preparation assembly includes, from top to bottom, undisturbed soil sample preparation rods, telescopic rods, a fixed disc, a blade slide rail, a cutting blade, and a bottom fixed support. A circular hole is provided on the rear side of the lower frame, through which the undisturbed soil sample preparation rods are vertically inserted and rotatably connected. The lower end of the undisturbed soil sample preparation rod is connected to the telescopic rod, and the lower end of the telescopic rod is connected to the fixed disc. The bottom fixed support is fixed to the base plate of the lower frame, and the blade slide rail is fixed to the bottom fixed support. A vertical cutting blade is fixed on the blade slide rail, and the cutting blade can move along the blade slide rail. For sample cutting, the distance between the cutting blade and the bottom fixed support can be adjusted via the blade slide rail to meet the cutting requirements of samples of different sizes.

[0014] The beneficial effects of this utility model are as follows:

[0015] This device employs a semi-automated preparation process, combining high-precision cutting and standardized compaction techniques. This significantly reduces errors from manual operation while improving preparation efficiency, ensuring the consistency and high quality of geotechnical samples, and thus enhancing the reliability and comparability of test data. Through this innovative design, the device not only optimizes the sample preparation process but also better meets the high-precision and high-efficiency requirements of modern geotechnical testing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the motor and transmission assembly of this utility model;

[0018] Figure 3 This is a schematic diagram of the original soil sample preparation component of this utility model;

[0019] Figure 4 This is a schematic diagram of the remolded soil sample preparation component of this utility model;

[0020] Figure 5 This is a structural schematic diagram of the framework of this utility model;

[0021] Figure 6 This is a schematic diagram of the connection between the motor transmission rod and the rod component of this utility model;

[0022] In the diagram: 1-Motor and transmission assembly; 11-Motor; 12-Motor slide rail; 13-Coupling; 14-Transmission rod; 15-Upper connecting hole; 151-Bolt; 152-Nut;

[0023] 2-Original soil sample preparation assembly; 22-Original soil sample preparation rod; 23-First bearing; 24-Locking screw; 25-Extendable rod; 26-Fixed disc; 27-Cutting blade; 28-Blade rail; 29-Bottom fixed support;

[0024] 3- Remolded soil sample preparation assembly; 32- Remolded soil sample preparation rod; 33- Second bearing; 34- Screw and nut assembly; 35- Screw; 36- Compaction rod; 37- Compaction and disturbance part; 38- Mold fixing part; 39- Bearing seat;

[0025] 4-Frame; 41-Upper frame; 42-Lower frame top plate; 43-Lower frame. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0027] like Figure 1As shown, a device for preparing undisturbed-reconstituted soil composites includes a motor and transmission assembly 1, an undisturbed soil sample preparation assembly 2, a reconstituted soil sample preparation assembly 3, and a frame.

[0028] like Figure 5 As shown, the frame comprises two layers: a lower frame 43 and an upper frame 41. Both frames are rectangular box-shaped, with the lower frame 43 being larger than the upper frame 41. The lower frame 43 includes a top plate, a left side plate, a right side plate, and a bottom plate, while the upper frame 41 includes a top plate, a left side plate, and a right side plate. Both the lower and upper frames 43 and 41 have open ends for easy equipment installation. The lower frame 43 is fixed to the ground, and the upper frame 41 is horizontally fixed to the top of the lower frame 43. The open ends of the lower and upper frames 43 and 41 face the same direction.

[0029] like Figure 2 As shown, the motor and transmission assembly 1 are connected to the upper frame 41, including the motor, motor slide rail 2, coupling, and transmission rod 14. The motor slide rail 2 is horizontally mounted on the top plate of the upper frame 41. The motor and motor slide rail 2 are installed in a nested manner, with the lower end of the motor vertically inserted into the upper frame 41. The motor slide rail 2 can drive the motor to move horizontally to the target position. The motor spindle and transmission rod 14 are connected by a high-precision coupling to ensure reliable transmission of rotational torque. The lower end of the transmission rod 14 is provided with a connector with a connection hole. After the motor is positioned, the connector can self-align with the top of the rod. The top of the rod is provided with a corresponding connector, which is fixed by bolts and nuts to establish a stable power transmission link.

[0030] like Figure 3As shown, the undisturbed soil sampling assembly 2 includes, from top to bottom, an undisturbed soil sampling rod 22, a first bearing 23, a locking screw 24, a telescopic rod 25, a fixed disc 26, a blade slide rail 28, a cutting blade 27, and a bottom fixed support 29. A circular hole is provided on the top plate of the lower frame 43, and the first bearing 23 is connected to the circular hole. The undisturbed soil sampling rod 22 is vertically inserted into the first bearing 23, and can rotate vertically under the support of the first bearing 23. The undisturbed soil sample preparation rod 22 is located in the upper frame 41, and the telescopic rod 25 is located in the lower frame 43. The undisturbed soil sample preparation assembly 2 adopts the telescopic rod 25 system. The top of the undisturbed soil sample preparation rod 22 is provided with a connecting hole for connecting the transmission rod 14. The surface of the undisturbed soil sample preparation rod 22 is treated with titanium nitride coating, which can withstand a large dynamic torque. Below the bearing is the telescopic rod 25, and the height of the telescopic rod 25 is selected according to the height of the sample. The upper end of the telescopic rod 25 is sleeved and connected to the lower end of the undisturbed soil sample preparation rod 22. The locking screw 24 is a locking structure, and tightening the locking screw 24 is used to fix the telescopic rod 25. The lower end of the telescopic rod 25 is fixed with a fixing disc 26, which is connected to the telescopic rod 25 by threads. The bottom fixed support 29 is fixed to the base plate of the lower frame 43, and the blade slide rail 28 is fixed to the bottom fixed support 29. A vertical cutting blade 27 is fixed on the blade slide rail 28, and the cutting blade 27 can move along the blade slide rail 28. In terms of sample cutting, the distance between the cutting blade 27 and the bottom fixed support 29 can be adjusted by the blade slide rail 28 to meet the cutting requirements of samples of different sizes.

[0031] like Figure 4 As shown, the remolded soil sample preparation assembly 3 includes, from top to bottom, a remolded soil sample preparation rod 32, a second bearing 33, a lead screw and nut assembly, a compaction rod 36, a compaction and disturbance part 37, a mold fixing part 38, and a bearing seat 39.

[0032] The top of the remolded soil sample rod 32 is also provided with a corresponding connecting hole, through which the transmission rod 14 is connected. A circular hole is opened on the top plate of the lower frame 43, and the second bearing 33 is connected in the circular hole. The remolded soil sample rod 32 is vertically inserted in the second bearing 33. A vertical screw nut component is connected to the lower end of the remolded soil sample rod 32. A vertical compaction rod 36 is connected to the lower end of the screw nut component. A compaction and disturbance part 37 is connected to the lower end of the compaction and disturbance part 36. A mold fixing part 38 and a bearing 39 are fixed on the bottom plate directly below the compaction and disturbance part 37. When the motor shaft rotates, the screw nut component drives the compaction rod 36 to move downward or upward to perform compaction or disturbance operations.

[0033] How to use:

[0034] s1. Preparation of undisturbed soil samples:

[0035] The process flow for preparing undisturbed soil samples is as follows: The movement of the undisturbed soil sample preparation component 2 is achieved through a modular rod system. First, the upper motor is axially moved along the motor slide rail 2 to directly above the undisturbed soil sample preparation rod 22. After alignment with the upper and lower holes, bolts are inserted into the holes from one end and tightened with nuts at the other end, establishing alignment with the undisturbed soil sample preparation rod 22. The rotational motion is transmitted to the lower telescopic rod 25 through the undisturbed soil sample preparation rod 22 and the first bearing 23. Then, the rod length is adjusted to match the sample height and locked by the locking screw 24. The fixed disc 26 and the bottom fixed support 39 simultaneously clamp the sample. The distance between the cutting blade 27 and the bottom fixed support 29 is adjusted according to the sample accuracy requirements. After starting the motor, the sample begins to rotate, and the cutting blade 27 cuts the sample, completing the non-disturbed precision machining of the sample.

[0036] Preparation of remolded soil samples:

[0037] The remolded soil sample preparation process is as follows: First, the upper motor is axially moved along the motor slide rail 2 to directly above the remolded soil sample preparation rod 32, aligning the upper and lower holes. Then, the bolt is inserted into the hole from one end and tightened with a nut at the other end, establishing alignment with the remolded soil sample preparation rod 32. Next, the standard sample mold is precisely positioned on the mold fixing base 39 of the support pedestal, completing the quantitative filling of the first layer of remolded soil. After starting the motor, the motor transmission rod 14 drives the remolded soil sample preparation rod 32 and the lower lead screw to rotate synchronously. Then, the nut and transmission device convert the rotational motion into axial linear displacement, driving the compaction and disturbance unit 37 to complete the automatic compaction of the first layer of soil. After the first layer is compacted, the control system switches the motor polarity to achieve reverse rotation of the transmission rod 14, and the compaction device then automatically returns to its original position along the lead screw. The operator uses a manual fine-tuning mechanism to vertically lower the compaction rod 36, causing the bottom surface of the compaction and disturbance part 37 to contact the surface of the compacted soil, thus disturbing the soil. The above process cycle (layer-by-layer filling → automatic compaction → surface disturbance → sample molding) is repeated until the sample reaches the preset density and structural characteristics requirements.

Claims

1. A device for preparing undisturbed-reconstituted soil composites, characterized in that, Includes motor and transmission assembly (1), undisturbed soil sample preparation assembly (2), remolded soil sample preparation assembly (3), and frame; The frame consists of two layers: a lower frame (43) and an upper frame (41). The lower frame (43) includes a top plate, a left side plate, a right side plate, and a bottom plate. The upper frame (41) includes a top plate, a left side plate, and a right side plate. The lower frame (43) is fixed to the ground, and the upper frame (41) is horizontally fixed to the top of the lower frame (43). The motor and transmission assembly (1) are connected to the upper frame (41). The lower end of the motor is vertically inserted into the upper frame (41). The motor can move back and forth in the horizontal direction. When it moves to the rear end, the position corresponds to the original soil sample preparation assembly (2). When it moves to the front end, the position corresponds to the remolded soil sample preparation assembly (3). The undisturbed soil sample preparation assembly (2) includes, from top to bottom, undisturbed soil sample preparation rods (22) and cutting blades (27). When the motor moves to the rear end, it connects to the undisturbed soil sample preparation rods (22). The motor is used to drive the undisturbed soil sample preparation rods (22) to rotate. The cutting blades (27) are located on the bottom plate of the lower frame (43). The position of the cutting blades (27) can be moved to meet the cutting requirements of samples of different sizes. The remolded soil sample preparation assembly (3) includes, from top to bottom, a remolded soil sample preparation rod (32), a mold fixing part (38), and a bearing (39). When the motor moves to the front end, it connects to the remolded soil sample preparation rod (32). The lower end of the remolded soil sample preparation rod (32) is connected to a vertical screw nut component (34). The lower end of the screw nut component (34) is connected to a vertical compaction rod (36). The lower end of the compaction rod (36) is connected to a compaction and disturbance part (37). The mold fixing part (38) and the bearing (39) are fixed on the base plate directly below the compaction rod (36). When the motor shaft rotates, the screw nut component (34) drives the compaction rod (36) to move downward or upward.

2. The apparatus for preparing undisturbed-reconstituted soil composite according to claim 1, characterized in that, The frame consists of two layers: a lower frame (43) and an upper frame (41). The two frames are rectangular boxes, and the lower frame (43) is larger than the upper frame (41). The lower frame (43) includes a top plate, a left side plate, a right side plate, and a bottom plate. The upper frame (41) includes a top plate, a left side plate, and a right side plate. The front and rear ends of the lower frame (43) and the upper frame (41) are open structures to facilitate equipment installation. The lower frame (43) is fixed to the ground, and the upper frame (41) is horizontally fixed to the top of the lower frame (43). The opening ends of the lower frame (43) and the upper frame (41) face the same direction.

3. The apparatus for preparing undisturbed-reconstituted soil composite according to claim 1, characterized in that, The motor and transmission assembly (1) includes a motor, a motor slide rail (12) and a transmission rod (14); the motor slide rail (12) is horizontally installed on the top plate of the upper frame (41), and the lower end of the motor is vertically inserted into the upper frame (41). The motor slide rail (12) can drive the motor to move horizontally to the target position.

4. The apparatus for preparing undisturbed-reconstituted soil composite according to claim 1, characterized in that, The undisturbed soil sampling assembly (2) includes, from top to bottom, an undisturbed soil sampling rod (22), a telescopic rod (25), a fixed disc (26), a blade slide rail (28), a cutting blade (27), and a bottom fixed support (29); a circular hole is provided on the rear side of the lower frame (43), the undisturbed soil sampling rod (22) is vertically inserted into the circular hole and rotated, the lower end of the undisturbed soil sampling rod (22) is connected to the telescopic rod (25), and the lower end of the telescopic rod (25) is connected to the fixed support (29). Fixed disc (26); bottom fixed support (29) is fixed on the base plate of the lower frame (43), blade slide rail (28) is fixed on bottom fixed support (29), vertical cutting blade (27) is fixed on blade slide rail (28), cutting blade (27) can move along blade slide rail (28); in terms of sample cutting, the cutting blade (27) can be adjusted to the distance between the blade slide rail (28) and bottom fixed support (29) to meet the cutting requirements of samples of different sizes.

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