In-situ shear test device

Abstract

The utility model discloses an in-situ shear test device, which relates to the technical field of in-situ testing, and comprises a movable frame, an arc-shaped clamping plate, a limiting screw rod and a sampling sleeve, the movable frame comprises two connecting lug plates, the two arc-shaped clamping plates are located between the two connecting lug plates, and the inner arc sides of the two arc-shaped clamping plates are oppositely arranged; the two limiting screw rods are in threaded connection with the corresponding connecting lug plates respectively; a clamping groove is formed in the outer wall of the sampling sleeve in the circumferential direction, one end of each limiting screw rod penetrates through the corresponding connecting lug plate and can push the two arc-shaped clamping plates to move relatively, and the inner arc sides of the two arc-shaped clamping plates can abut against the clamping groove; and a cutting knife assembly is arranged on the outer arc side of the arc-shaped clamping plate. The in-situ shear test device disclosed by the utility model can reduce contamination, is convenient to disassemble and clean, and improves the test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of in-situ testing technology, and in particular to an in-situ shear test device. Background Technology

[0002] In the field of engineering construction, the combination of engineering and ecological technologies is receiving increasing attention. Among these, vegetation-based slope protection technology is widely used due to its economic and environmental advantages. The root-soil composite, composed of plant roots and soil, can significantly improve the shear strength of slopes, thereby enhancing slope stability. To accurately assess the shear characteristics of the root-soil composite, in-situ shear testing has become an important method. This test can be conducted in a real-world condition without disturbing the root-soil composite, resulting in results that more closely reflect actual conditions.

[0003] The existing in-situ shear test device for root-soil composites has some shortcomings. First, loess easily gets stuck on the test device during sampling. Second, the test device is not easy to disassemble and clean after being stuck with loess, which affects the test efficiency.

[0004] In view of the problems of the prior art, those skilled in the art urgently need an in-situ shear testing device. Utility Model Content

[0005] The purpose of this invention is to provide an in-situ shear testing device to solve the problems existing in the prior art, reduce contamination, facilitate disassembly and cleaning, and improve testing efficiency.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] This utility model provides an in-situ shear testing device, including a movable frame, arc-shaped clamps, limiting screws, and a sampling sleeve; the movable frame includes two connecting lugs, the two arc-shaped clamps are located between the two connecting lugs, and the inner arc sides of the two arc-shaped clamps are arranged opposite to each other; the two limiting screws are respectively threaded to the corresponding connecting lugs; the outer wall of the sampling sleeve is provided with a snap-fit ​​groove along the circumferential direction, one end of each of the two limiting screws passes through the corresponding connecting lugs and can push the two arc-shaped clamps to move relative to each other, and the inner arc sides of the two arc-shaped clamps can abut against the snap-fit ​​groove; a cutting blade assembly is provided on the outer arc side of the arc-shaped clamps.

[0008] In some embodiments, a fixed frame and a pressure rod assembly are also included; the fixed frame includes a first top plate and two side plates, each of the two side plates having a guide groove in the vertical direction; the movable frame is located between the two side plates, the limiting screw passes through the guide groove and is threadedly connected to the connecting lug; one end of the pressure rod assembly passes through the first top plate and is fixedly connected to the movable frame, the connecting pressure plate can drive the movable frame to move in the vertical direction, and the limiting screw can slide along the guide groove.

[0009] In some embodiments, the cutting blade assembly includes a first cutting blade and a second cutting blade; two parallel first cutting blades are disposed at the middle of the outer arc side of the arc-shaped clamping plate, and the second cutting blades are disposed at both ends of the outer arc side of the arc-shaped clamping plate; a first cutting portion is disposed at the bottom of both the first cutting blade and the second cutting blade.

[0010] In some embodiments, two connecting blocks are also included; one end of each of the two first cutting blades is connected and fixed to the outer arc side of the arc-shaped clamp, and the other end of each of the two first cutting blades is connected and fixed to the corresponding connecting block; one end of each of the two limiting screws passes through the corresponding connecting lug and is rotatably connected to the corresponding connecting block.

[0011] In some embodiments, the connecting pressure plate includes a horizontal bar and two vertical bars; the first top plate has through holes for the vertical bars to pass through, and the movable frame includes a second top plate; one end of each of the two vertical bars is connected and fixed to the horizontal bar, and the other end passes through the corresponding through holes and is connected and fixed to the second top plate.

[0012] In some embodiments, the system further includes a test bench, a support frame, and a placement basin; the support frame is mounted on the test bench, the bottom end of the fixed frame is connected and fixed to the top end of the support frame, the placement basin is mounted on the top end of the support frame and located between the two side plates; the placement basin contains a sample to be cut, the pressure rod assembly can drive the movable frame to move vertically downward and drive the sampling sleeve to insert into the sample to be cut; the cutting blade assembly is used to cut the sample to be cut.

[0013] In some embodiments, the second top plate of the movable frame is provided with a clearance hole for avoiding the sample to be cut.

[0014] In some embodiments, the first cutting blade and the second cutting blade are arranged perpendicular to each other.

[0015] In some embodiments, the bottom end of the sampling sleeve is provided with a second cutting section.

[0016] In some embodiments, the side plate is abutted against the opposite side of the corresponding connecting ear plate.

[0017] The present invention achieves the following technical advantages over the prior art:

[0018] This invention relates to an in-situ shear testing device. The sampling sleeve is detachably connected to two arc-shaped clamping plates. Specifically, the two arc-shaped clamping plates are positioned between two connecting lugs, and limiting screws are threadedly connected to the corresponding connecting lugs. By tightening the two limiting screws, the two arc-shaped clamping plates can be moved relative to each other. The outer peripheral wall of the sampling sleeve has grooves, allowing the two limiting screws to push the inner arc sides of the two arc-shaped clamping plates into the locking grooves and abut against the bottom of the grooves. When it is necessary to clean the adhering loess, the two limiting screws can be tightened to separate the two arc-shaped clamping plates from the sampling sleeve. Therefore, this invention's testing device is easy to disassemble and clean, improving efficiency. Furthermore, a cutting blade assembly is provided on the outer arc side of the arc-shaped clamping plates. When the sampling sleeve is inserted into the loess sample column, the cutting blade assembly cuts the loess sample column, reducing loess contamination. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the in-situ shear test device in some embodiments of this utility model;

[0021] Figure 2 This is a schematic diagram showing the connection between the fixing frame and the support frame in some embodiments of this utility model;

[0022] Figure 3 This is a schematic diagram showing the connection between the movable frame and the arc-shaped clamp in some embodiments of this utility model;

[0023] In the figure: 1-Test bench; 2-Support frame; 3-Placement basin; 4-Sample to be cut; 5-Fixed frame; 6-Movable frame; 7-Guide groove; 8-Limiting screw; 9-Connecting block; 10-First cutting blade; 11-Arc-shaped clamp; 12-Second cutting blade; 13-Sampling sleeve; 14-Pressure bar assembly. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] The purpose of this invention is to provide an in-situ shear testing device to solve the problems existing in the prior art, reduce contamination, facilitate disassembly and cleaning, and improve testing efficiency.

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] This utility model provides an in-situ shear testing device, such as... Figures 1 to 3 As shown, the test bench includes a test bench 1, a support frame 2, a placement basin 3, a sample to be cut 4, and a fixing frame 5. The support frame 2 is installed on the upper surface of the test bench 1, with its middle part protruding upwards. The bottom end of the fixing frame 5 is connected and fixed to the top end of the support frame 2. The fixing frame 5 includes a first top plate and two side plates, which are vertically connected to the two ends of the first top plate along its length. The placement basin 3 is installed on the top end of the support frame 2 and is located between the two side plates. The sample to be cut 4 is placed in the placement basin 3.

[0028] The in-situ shear test device of this invention is used to sample the root-soil composite. The sample 4 to be cut is a loess column.

[0029] See Figure 3 As shown, the in-situ shear test device of this utility model also includes a movable frame 6, an arc-shaped clamping plate 11, a limiting screw 8, and a sampling sleeve 13; the movable frame 6 includes a second top plate and two connecting ear plates, the two connecting ear plates being perpendicularly connected to both ends of the second top plate in the length direction; the two arc-shaped clamping plates 11 are located between the two connecting ear plates, and the inner arc sides of the two arc-shaped clamping plates 11 are arranged opposite to each other.

[0030] Both connecting lugs have threaded holes, and two limiting screws 8 correspond one-to-one with the threaded holes of the two connecting lugs and are threadedly connected. One end of each limiting screw 8 passes through the corresponding connecting lug and is used to push the two arc-shaped clamping plates 11 to move relative to each other or away from each other. The outer wall of the sampling sleeve 13 is provided with a snap-fit ​​groove along the circumference. The two arc-shaped clamping plates 11 can be inserted into the snap-fit ​​groove and pressed against the bottom of the groove when they move relative to each other. When disassembly and cleaning are required, the limiting screws 8 are turned to move the two arc-shaped clamping plates 11 in opposite directions to separate them from the snap-fit ​​groove. Thus, this utility model can realize the detachable connection between the two arc-shaped clamping plates 11 and the sampling sleeve 13, which facilitates subsequent disassembly and cleaning and improves efficiency.

[0031] The sampling sleeve 13 of this utility model is used to insert into the middle of the sample 4 to be cut for sampling; and a cutting blade assembly is provided on the outer arc side of the arc-shaped clamp 11. The cutting blade assembly is used to cut the periphery of the sample 4 to be cut in order to reduce the loess contamination test device.

[0032] In some embodiments, a pressure bar assembly 14 is also included, which includes a horizontal bar and two vertical bars; one end of the two vertical bars is connected and fixed to the horizontal bar, and the other end of the two vertical bars passes through a through hole in the first top plate of the fixed frame 5 and is connected and fixed to the second top plate of the movable frame 6.

[0033] like Figure 2 As shown, guide grooves 7 are provided vertically on the two side plates of the fixing frame 5; Figure 1 As shown, the movable frame 6 is located between the two side plates, and the limiting screw 8 passes through the guide groove 7 and is threadedly connected to the corresponding connecting ear plate. The pressure rod assembly 14 can drive the movable frame 6 to slide in the vertical direction, while the limiting screw 8 slides along the guide groove 7, so that the sampling sleeve 13 and the cutting blade assembly can cut and sample the specimen 4 to be cut.

[0034] In some implementations, such as Figure 3 As shown, the cutting blade assembly includes a first cutting blade 10 and a second cutting blade 12; two parallel first cutting blades 10 are arranged in the middle of the outer arc side of each arc-shaped clamping plate 11, and a second cutting blade 12 is arranged at both ends of the outer arc side of each arc-shaped clamping plate 11; a first cutting section is provided at the bottom end of both the first cutting blade 10 and the second cutting blade 12. The first cutting section here can be a cutting blade structure, used to cut the sample 4 to be cut.

[0035] Furthermore, one end of the first cutting blade 10 is connected and fixed to the outer arc side of the arc-shaped clamping plate 11, and the other end extends away from the arc-shaped clamping plate 11; one end of the second cutting blade 12 is connected and fixed to the outer arc side of the arc-shaped clamping plate 11, and the other end extends away from the arc-shaped clamping plate 11; and the extension directions of the first cutting blade 10 and the second cutting blade 12 are perpendicular to each other.

[0036] In some implementations, see further reference. Figure 3 It also includes two connecting blocks 9; one end of the two first cutting blades 10 away from the arc-shaped clamping plate 11 is connected and fixed to one end of the corresponding connecting block 9; one end of the limiting screw 8 passes through the connecting ear plate and is rotatably connected to the corresponding connecting block 9.

[0037] Thus, by turning the limiting screw 8, the limiting screw 8 can push the connecting block 9 and the arc-shaped clamping plate 11 to move as a whole, so that the two arc-shaped clamping plates 11 abut against or separate from the snap-fit ​​groove of the sampling sleeve 13.

[0038] It should also be noted that one end of the limiting screw 8 is rotatably connected to the connecting block 9 but the two will not separate, so that the two limiting screws 8 can drive the two arc-shaped clamps 11 to separate from the sampling sleeve 13 through the corresponding connecting block 9.

[0039] In some embodiments, the second top plate of the movable frame 6 is provided with a clearance hole, which is used to avoid the sample 4 to be cut and sampled.

[0040] In some embodiments, the bottom end of the sampling sleeve 13 is provided with a second cutting part, which may be a cutting blade structure, so that the sampling sleeve 13 can be inserted into the sample 4 to be cut for sampling.

[0041] In some embodiments, the side plate of the fixed frame 5 is fitted against the opposite side of the connecting ear plate of the movable frame 6 for limiting; the present invention limits the movement of the movable frame 6 relative to the fixed frame 5 only in the vertical direction by limiting the movement between the side plate and the connecting ear plate, and limiting the movement between the limiting screw 8 and the guide groove 7.

[0042] In some embodiments, the outer diameter of the threaded portion of the limiting screw 8 is smaller than the width of the guide groove 7, thereby allowing one end of the limiting screw 8 to pass through the guide groove 7 and slide in connection with it.

[0043] When using the in-situ shear testing device of this utility model:

[0044] The sample 4 to be cut is placed in the placement basin 3. The operator presses down on the pressure rod assembly 14. The pressure rod assembly 14 drives the movable frame 6 to move downward, while the limiting screw 8 slides downward along the guide groove 7.

[0045] The movable frame 6 drives the arc-shaped clamping plate 11 and the sampling sleeve 13 to cut and sample downwards as a whole. Specifically, the sampling sleeve 13 is inserted into the middle of the sample 4 to be cut to take a sample, and the first cutting blade 10 and the second cutting blade 12 on the arc-shaped clamping plate 11 cut the outer periphery of the sample 4 to be cut.

[0046] This invention achieves automatic cutting of the loess sample column and insertion of the sampling sleeve 13 through the cooperation of the movable frame 6, the limiting screw 8, and the cutting blade assembly, avoiding the inconvenience of manual operation. The cutting blade assembly cleans the loess, reducing contamination, and the arc-shaped clamp 11 engages with the sampling sleeve 13, facilitating disassembly and cleaning, improving testing efficiency, and ensuring accuracy.

[0047] This invention replaces manual insertion of the sampling tube with a mechanical structure, reducing loess contamination of the surrounding area and facilitating cleaning. This improves the ease of operation and efficiency of in-situ shear tests on root-soil composites, and ensures the accuracy of test data.

[0048] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An in-situ shear test apparatus characterized by, Includes a movable frame, an arc-shaped clamp, a limiting screw, and a sampling sleeve; The movable frame includes two connecting lugs, two arc-shaped clamps are located between the two connecting lugs, and the inner arc sides of the two arc-shaped clamps are arranged opposite to each other; the two limiting screws are respectively threaded to the corresponding connecting lugs. The outer wall of the sampling sleeve is provided with a snap-fit ​​groove along the circumference. One end of each of the two limiting screws passes through the corresponding connecting lug and can push the two arc-shaped clamps to move relative to each other. The inner arc side of the two arc-shaped clamps can abut against the snap-fit ​​groove. A cutting blade assembly is provided on the outer arc side of the arc-shaped clamp.

2. The in-situ shear test apparatus of claim 1, wherein, It also includes a mounting bracket and a pressure bar assembly; The fixed frame includes a first top plate and two side plates, each of which has a guide groove in the vertical direction; the movable frame is located between the two side plates, and the limiting screw passes through the guide groove and is threadedly connected to the connecting ear plate. One end of the pressure rod assembly passes through the first top plate and is fixedly connected to the movable frame. The pressure rod assembly can drive the movable frame to move in the vertical direction, and the limiting screw can slide along the guide groove.

3. The in-situ shear test apparatus of claim 1, wherein, The cutting blade assembly includes a first cutting blade and a second cutting blade; Two parallel first cutting blades are provided in the middle of the outer arc side of the arc-shaped clamping plate, and the second cutting blades are provided at both ends of the outer arc side of the arc-shaped clamping plate. Both the first cutting blade and the second cutting blade have a first cutting section at their bottom.

4. The in-situ shear test apparatus of claim 3, wherein, It also includes two connection blocks; One end of each of the two first cutting blades is connected and fixed to the outer arc side of the arc-shaped clamp, and the other end of each of the two first cutting blades is connected and fixed to the corresponding connecting block. One end of each of the two limiting screws passes through the corresponding connecting lug and is rotatably connected to the corresponding connecting block.

5. The in-situ shear test apparatus of claim 2, wherein, The pressure bar assembly includes a horizontal bar and two vertical bars; The first top plate has a through hole for the vertical rod to pass through, and the movable frame includes a second top plate; one end of the two vertical rods is connected and fixed to the horizontal rod, and the other end passes through the corresponding through hole and is connected and fixed to the second top plate.

6. The in-situ shear test apparatus of claim 2, wherein, It also includes a test bench, support frame, and placement basin; The support frame is installed on the test bench, the bottom end of the fixing frame is connected and fixed to the top end of the support frame, and the placement basin is installed on the top end of the support frame and located between the two side plates. The sample to be cut is placed in the placement basin, and the pressure rod assembly can drive the movable frame to move vertically downward and drive the sampling sleeve to be inserted into the sample to be cut. The cutting blade assembly is used to cut the sample to be cut.

7. The in-situ shear test apparatus of claim 5, wherein, The second top plate of the movable frame is provided with a clearance hole for avoiding the sample to be cut.

8. The in-situ shear test apparatus of claim 3, wherein, The first cutting blade and the second cutting blade are arranged perpendicular to each other.

9. The in-situ shear test apparatus of claim 1, wherein, The bottom end of the sampling sleeve is provided with a second cutting section.

10. The in-situ shear test apparatus of claim 2, wherein, The side plate is fitted to the opposite side of the corresponding connecting ear plate.

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