Novel soil cutting device for engineering investigation geotechnical test

Abstract

The utility model discloses a soil cutting device for a soil test, which belongs to the technical field of soil test equipment and comprises a base, a soil sample placing mechanism and a cutting mechanism. Wherein the soil sample placing mechanism is arranged on the base and plays a role in supporting a test soil sample, the test soil sample is placed on a soil sample placing semi-arc plate, the soil sample placing semi-arc plate slides and rotates relative to a supporting semi-arc plate through connection of a bearing, the soil sample is easy to cut, and a plurality of cutting steel strings are arranged on the cutting mechanism. The slitting device is used for slitting a test soil sample. According to the device, the mounting number of the cutting steel strings on the cutting mechanism can be adjusted according to the number and size of required samples so as to meet different geotechnical test requirements, a plurality of soil sample test blocks can be cut at a time, the cut soil samples are regular in shape and smooth and flat in surface, especially for soft soil, the disturbance degree of the soil samples is reduced, the sample preparation efficiency and quality are improved, and the device is suitable for popularization and application. And a good foundation is laid for subsequent fine cutting of the soil sample, so that standardization of sample preparation can be realized. The device is simple in structure, easy and convenient to operate, low in manufacturing cost and good in effect in actual tests.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical tests, in particular to a novel soil cutting device used for engineering investigation and geotechnical tests. Background Art

[0002] In geotechnical engineering investigations, in order to accurately determine the physical and mechanical properties of rock and soil, in addition to conducting in-situ tests on site, it is also necessary to collect original or disturbed soil samples and return them to the room for geotechnical tests, and analyze the physical and mechanical properties of the soil based on the test results.

[0003] Conventional geotechnical tests include physical property tests (such as density, water content, liquid limit and plastic limit tests, and particle analysis tests) and mechanical property tests (such as consolidation tests and shear strength tests). Mechanical properties are primarily tested on undisturbed soil samples taken on-site. The goal is to maintain the original structure and state of the soil sample while simulating the engineering stress state of the soil sample using testing equipment such as oedometers and direct shear apparatuses. The compression and shear properties of the soil sample are then tested, and the test results are used to guide engineering construction. The mechanical properties of soil require extremely high undisturbed soil samples. However, during indoor geotechnical testing, due to operator issues, the sample preparation process significantly disturbs the undisturbed soil sample. This, to a certain extent, affects the accuracy of the test results and directly impacts the safety and economic efficiency of engineering construction.

[0004] Currently, indoor geotechnical consolidation tests mostly use specimens with a diameter of 61.8 mm and a height of approximately 20 mm. The standard size for triaxial specimens is generally 35 mm in diameter and 70 mm in height. Untouched soil samples collected on-site using a soil sampler are generally 90 mm in diameter and 200 mm in length. Therefore, these untouched soil samples must be divided into blocks and then fabricated into standard specimens for testing. The current method for dividing untouched soil samples is relatively primitive, using a simple wire saw consisting of a handle and steel wire. The soil sample is placed on a horizontal test bench along its long diameter. The operator holds the sample with one hand while cutting with the wire saw with the other. During the cutting process, the sample is rotated continuously, allowing the wire to penetrate the sample and eventually sever the sample. Each untouched soil sample is cut multiple times with the wire saw to separate into multiple specimen blocks. The blocks are then further finely cut with a circular cutter to achieve the standard test size.

[0005] Manual sample cutting with a wire saw has the following drawbacks: 1) The soil sample is subjected to complex forces during cutting, especially for soft soils. The pressure from the tester's hand increases the density of the soil, causing disturbance. 2) The cross-section of the soil sample cut by the wire saw is uneven, often resulting in skewed cuts, poor sample quality, and failures. This also increases the difficulty and workload of subsequent fine cutting. 3) The wire saw can only cut one specimen at a time, resulting in low cutting efficiency and a high labor cost.

[0006] Therefore, designing a simple tool for dividing undisturbed soil samples has become a technical problem that needs to be solved urgently. Utility Model Content

[0007] The purpose of the utility model is to provide a novel soil cutting device for engineering investigation and geotechnical testing, so as to solve the shortcomings of the traditional simple wire saw mentioned in the above background technology.

[0008] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a new type of soil cutting device for engineering survey and geotechnical testing, comprising a base, wherein one side of the top of the base is fixedly installed with two support rods, the tops of the two support rods are fixedly installed with a rotating shell, the interiors of the two rotating shells are rotatably connected with assembly shafts, a cutting mechanism is fixedly installed between the two assembly shafts, the cutting mechanism comprises a first chord connecting tube and a second chord connecting tube, one side of the first chord connecting tube and one side of the second chord connecting tube are fixedly installed with steel chord mounting joints, and a cutting steel chord is installed between every two steel chord mounting joints, a support seat is fixedly installed in the middle of the top of the base, a supporting semi-arc plate is fixedly installed on the top of the support seat, a soil sample placement piece is provided inside the supporting semi-arc plate, and the soil sample placement piece comprises a turntable and a handle, one end of the turntable is fixedly connected to one end of the handle, and a soil sample placement semi-arc plate is provided on one side of the turntable.

[0009] Preferably, a pressure rod is fixedly installed on the top of the first chord connecting tube, a handle is fixedly installed on one end of the pressure rod, a connecting rod is fixedly installed on one side of the bottom end of the pressure rod, and the bottom end of the connecting rod is fixedly connected to the middle part of the top end of the second chord connecting tube. The user holds the handle, and the handle drives the pressure rod to move synchronously, one end of the pressure rod drives the first chord connecting tube to move synchronously, and the other end of the pressure rod drives the second chord connecting tube to move synchronously through the connecting rod to adjust the cutting direction of the cutting mechanism.

[0010] Preferably, the first chord connecting tube is fixedly connected to two assembly shafts at each end. The second chord connecting tube is threadedly connected to a plurality of adjustment bolts, each corresponding to a plurality of cutting steel strings. The cutting steel strings extend through the second chord connecting tube and cut the soil column placed on the semicircular plate. The user then rotates the adjustment bolts, and the threads on the surface of the adjustment bolts mate with the threads on the inner wall of the second chord connecting tube. This causes the adjustment bolts to rotate relative to the second chord connecting tube, and the adjustment bolts pull the cutting steel strings from one end, ensuring a high tension between the first and second chord connecting tubes. When cutting soil samples, the cutting steel strings should be fixedly positioned between the first and second chord connecting tubes in a straightened state.

[0011] Preferably, several bearings are fixedly installed on the surface of the supporting semi-circular plate, and several of the bearings are connected to the soil sample placing semi-circular plate. The soil sample is placed on the soil sample placing semi-circular plate, and the bearings enable the soil sample placing semi-circular plate to rotate and slide relative to the supporting semi-circular plate.

[0012] Preferably, four soil sample fixing columns arranged in a rectangular shape are fixedly installed at one end of the turntable away from the handle, and the four soil sample fixing columns are all connected to the semicircular arc plate for placing the soil samples. When the user turns the handle, the handle drives the turntable to rotate, and the turntable drives the soil samples installed on the soil sample fixing columns to rotate synchronously.

[0013] Preferably, a fixing frame is installed on the surface of the turntable, and the turntable is connected to the supporting semi-circular arc plate through the fixing frame. The user fixes the turntable on the supporting semi-circular arc plate through the fixing frame.

[0014] Preferably, an anti-collision pad is fixedly installed on the side of the top of the base away from the support rod. The setting of the anti-collision pad prevents the cutting mechanism from pressing down too much and contacting the base, which will cause the cutting mechanism to hit the base and generate noise while damaging the base.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting a cutting mechanism and a soil sample placement member, the test soil sample is placed on a soil sample placement semicircular plate, and the soil sample placement semicircular plate is connected by a bearing, so that the soil sample placement semicircular plate is deflected relative to the supporting semicircular plate, which can drive the soil sample installed on the soil sample placement semicircular plate to rotate. The installation of this device makes it easy to cut soil samples. A plurality of cutting steel strings are provided on the cutting mechanism, and the bolts can be adjusted according to the operation. The number of cutting steel strings installed on the cutting mechanism can be adjusted according to the required number and size of samples, so that multiple soil sample blocks can be cut out at one time. This replaces the traditional soil cutting method, improves the efficiency and quality of sample preparation, and can adjust the number of cutting steel strings to meet the needs of different geotechnical tests. The present device has a simple structure, is easy to operate, and has a low production cost, and has a good effect in actual tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 This is the main view of the utility model;

[0018] Figure 3 It is a side view of the utility model;

[0019] Figure 4 It is a partial schematic diagram of the utility model;

[0020] Figure 5 This is a connection diagram of the supporting semicircular arc plate and the bearing of the utility model.

[0021] In the figure: 1. Base; 2. Anti-collision pad; 3. Support seat; 4. Support rod; 5. First chord connecting pipe; 6. Second chord connecting pipe; 7. Adjusting bolt; 8. Steel string mounting joint; 9. Cutting steel string; 10. Cutting mechanism; 11. Connecting rod; 12. Handle; 13. Pressure rod; 14. Support semicircular plate; 15. Soil sample placement piece; 151. Soil sample placement semicircular plate; 152. Turning handle; 153. Soil sample fixing column; 154. Turntable; 155. Fixed frame; 16. Bearing; 17. Rotating shell; 18. Assembly shaft. DETAILED DESCRIPTION

[0022] The following will provide a clear and complete description of the technical solution in this utility model patent in conjunction with the accompanying drawings of this utility model patent.

[0023] See also Figure 1-5 The utility model provides a new type of soil cutting device for engineering investigation and geotechnical testing, including a base 1, two support rods 4 are fixedly installed on one side of the top of the base 1, and a rotating shell 17 is fixedly installed on the top of the two support rods 4. The interior of the two rotating shells 17 is rotatably connected with an assembly shaft 18, and a cutting mechanism 10 is fixedly installed between the two assembly shafts 18. The cutting mechanism 10 includes a first chord connecting tube 5 and a second chord connecting tube 6, and a steel string mounting joint 8 is fixedly installed on one side of the first chord connecting tube 5 and one side of the second chord connecting tube 6. A cutting steel string 9 is installed between every two opposing steel string mounting joints 8. A support seat 3 is fixedly installed on the middle part of the top of the base 1, and a supporting semi-circular plate 14 is fixedly installed on the top of the support seat 3. A soil sample placement piece 15 is provided inside the supporting semi-circular plate 14. The soil sample placement piece 15 includes a turntable 154 and a handle 152. One end of the turntable 154 is fixedly connected to one end of the handle 152, and a soil sample placement semi-circular plate 151 is provided on one side of the turntable 154.

[0024] A pressure rod 13 is fixedly installed on the top of the first chorus connecting tube 5, and a handle 12 is fixedly installed on one end of the pressure rod 13. A connecting rod 11 is fixedly installed on one side of the bottom end of the pressure rod 13. The bottom end of the connecting rod 11 is fixedly connected to the middle part of the top end of the second chorus connecting tube 6. The user holds the handle 12, and the handle 12 drives the pressure rod 13 to move synchronously. One end of the pressure rod 13 drives the first chorus connecting tube 5 to move synchronously, and the other end of the pressure rod 13 drives the second chorus connecting tube 6 to move synchronously through the connecting rod 11 to adjust the cutting direction of the cutting mechanism 10.

[0025] The first chord connecting tube 5 is fixedly connected to two assembly shafts 18 at both ends. Several adjusting bolts 7 are threadedly connected to the surface of the second chord connecting tube 6. These adjusting bolts 7 correspond to several cutting steel strings 9, which extend through the second chord connecting tube 6. When the user turns the adjusting bolts 7, the threads on the surface of the adjusting bolts 7 mate with the threads on the inner wall of the second chord connecting tube 6, causing the adjusting bolts 7 to rotate relative to the second chord connecting tube 6. The adjusting bolts 7 pull the cutting steel strings 9 from one end, thus increasing the tension between the cutting steel strings 9 and the first chord connecting tube 5, 6 by tightening the adjusting bolts. The cutting steel strings 9 cut the soil sample placed on the semicircular plate 151.

[0026] Several bearings 16 are fixedly installed on the surface of the supporting semicircular plate 14. The several bearings 16 are all connected to the soil sample placing semicircular plate 151. The soil sample is placed on the soil sample placing semicircular plate 151, and the soil sample placing semicircular plate 151 slides relative to the supporting semicircular plate 14 through the bearings 16.

[0027] Four soil sample fixing columns 153 arranged in a rectangular shape are fixedly installed on one end of the turntable 154 away from the turning handle 152. The four soil sample fixing columns 153 are all connected to the semicircular arc plate 151 for placing the soil sample. When the user turns the turning handle 152, the turning handle 152 drives the turntable 154 to rotate, and the turntable 154 drives the soil samples installed on the soil sample fixing columns 153 to rotate synchronously.

[0028] A fixing frame 155 is installed on the surface of the turntable 154 , and the turntable 154 is connected to the supporting semicircular plate 14 through the fixing frame 155 . The user fixes the turntable 154 on the supporting semicircular plate 14 through the fixing frame 155 .

[0029] A crash pad 2 is fixedly installed on the side of the top of the base 1 away from the support rod 4. The setting of the crash pad 2 prevents the cutting mechanism 10 from pressing down too much and contacting the base 1, which would cause the cutting mechanism 10 to hit the base 1 and generate noise while damaging the base 1.

[0030] When the embodiment of the present application is in use: the soil sample is placed on the soil sample placement semicircular plate 151, and one end of the soil sample is inserted into the soil sample fixing plug. The user holds the handle 12, and the handle 12 drives the pressure rod 13 to move synchronously. One end of the pressure rod 13 drives the first chord connecting tube 5 to move synchronously, and the other end of the pressure rod 13 drives the second chord connecting tube 6 to move synchronously through the connecting rod 11, so that the cutting direction of the cutting mechanism 10 can be adjusted. The user rotates the handle 152, and the handle 152 drives the turntable 154 to rotate. The turntable 154 drives the soil sample fixing plug 153 and the soil sample placed on the soil sample placement semicircular plate 151 to move synchronously. The cutting steel string 9 cuts the soil sample placed on the soil sample placement semicircular plate 151. The soil sample placement semicircular plate 151 is rotated and slid relative to the supporting semicircular plate 14 through the bearing 16 to adjust the cutting position of the soil sample.

[0031] The cutting steel string 9 passes through the second string connecting tube 6. Then, the user rotates the adjusting bolt 7. The thread on the surface of the adjusting bolt 7 matches the thread on the inner wall of the second string connecting tube 6. Therefore, the adjusting bolt 7 rotates relative to the second string connecting tube 6, and the adjusting bolt 7 pulls the cutting steel string 9 from one end. Therefore, by tightening the adjusting bolt, the tension of the cutting steel string 9 between the first string connecting tube 5 and the second string connecting tube 6 can be increased. This method can be used to tighten the screw and improve the cutting effect.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A new type of soil cutting device for engineering investigation and geotechnical testing, comprising a base (1), characterized in that: Two support rods (4) are fixedly mounted on one side of the top of the base (1), and a rotating shell (17) is fixedly mounted on the top of each of the two support rods (4). An assembly shaft (18) is rotatably connected to the interior of each of the two rotating shells (17). A cutting mechanism (10) is fixedly mounted between the two assembly shafts (18). The cutting mechanism (10) includes a first chord connecting tube (5) and a second chord connecting tube (6). A steel string mounting joint (8) is fixedly mounted on one side of the first chord connecting tube (5) and one side of the second chord connecting tube (6). Each of the two A cutting steel string (9) is installed between the steel string installation joints (8), a support seat (3) is fixedly installed in the middle of the top of the base (1), a supporting semi-circular plate (14) is fixedly installed on the top of the supporting seat (3), a soil sample placement member (15) is provided inside the supporting semi-circular plate (14), and the soil sample placement member (15) includes a turntable (154) and a turning handle (152), one end of the turntable (154) is fixedly connected to one end of the turning handle (152), and a soil sample placement semi-circular plate (151) is provided on one side of the turntable (154).

2. A novel soil cutting device for engineering investigation and geotechnical testing according to claim 1, characterized in that: A pressure rod (13) is fixedly mounted on the top end of the first chorus connecting tube (5), a handle (12) is fixedly mounted on one end of the pressure rod (13), a connecting rod (11) is fixedly mounted on one side of the bottom end of the pressure rod (13), and the bottom end of the connecting rod (11) is fixedly connected to the middle part of the top end of the second chorus connecting tube (6).

3. The novel soil cutting device for engineering investigation and geotechnical testing according to claim 1 is characterized by: The two ends of the first chord connecting tube (5) are respectively fixedly connected to two assembly shafts (18); the surface of the second chord connecting tube (6) is threadedly connected to a plurality of adjusting bolts (7); and the plurality of adjusting bolts (7) are respectively arranged corresponding to a plurality of cut steel strings (9).

4. The novel soil cutting device for engineering investigation and geotechnical testing according to claim 1 is characterized by: A plurality of bearings (16) are fixedly mounted on the surface of the supporting semicircular arc plate (14). The plurality of bearings (16) are all connected to the soil sample placement semicircular arc plate (151).

5. The novel soil cutting device for engineering investigation and geotechnical testing according to claim 1 is characterized by: Four soil sample fixing plugs (153) arranged in a rectangular shape are fixedly mounted on one end of the turntable (154) away from the turn handle (152), and the four soil sample fixing plugs (153) are all connected to the soil sample placement semicircular arc plate (151).

6. The novel soil cutting device for engineering investigation and geotechnical testing according to claim 1 is characterized by: A fixing frame (155) is installed on the surface of the rotating disk (154), and the rotating disk (154) is connected to the supporting semicircular arc plate (14) through the fixing frame (155).

7. The novel soil cutting device for engineering investigation and geotechnical testing according to claim 1 is characterized by: An anti-collision pad (2) is fixedly mounted on the side of the top end of the base (1) away from the support rod (4).

Images