Combined device for taking I-grade undisturbed cohesive soil sample under complex terrain condition

Abstract

The invention discloses a combined device for taking an I-grade undisturbed cohesive soil sample under a complex terrain condition. The combined device comprises a u-shaped steel frame, a pushing assembly and a sampling assembly, a pushing assembly is arranged on the u-shaped steel frame; a sampling assembly is arranged at one end of the pushing assembly and is used for collecting sample soil; the pushing assembly comprises a threaded rod; the threaded rod is arranged on the u-shaped steel frame and connected through a thread, one end of the threaded rod is connected with the stress application rod, the other end of the threaded rod is connected with the upper connector, the other end of the upper connector is in threaded connection with the connector middle, and the other end of the connector middle is in threaded connection with the connecting rod. A fixing block is arranged at the bottom of the connecting rod, a cavity is formed in the inner side of the fixing block, an embedding block is arranged at the top of the connecting shaft and arranged in the cavity of the fixing block, and a hanging ring is arranged at the bottom of the connecting shaft. Through the arrangement of the pushing assembly, an operator can conveniently take out the sampling sleeve and a soil sample together, the operation is simple and easy, the soil sample cannot be disturbed, and therefore the quality of the soil sampling sample is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of geotechnical engineering, and is a combined device for taking Class-I undisturbed cohesive soil samples under complex terrain conditions. Background Art

[0002] During highway engineering geological exploration or geotechnical engineering exploration, exploration technicians sometimes need to understand the engineering geological properties of the foundation soil at the site. At this time, it is necessary to take samples of the foundation soil at the site for analysis, that is, to take undisturbed soil samples of the site soil for relevant tests, such as water content, density, strength tests and consolidation tests, and to name the foundation soil. For sites with good site conditions, drill rigs can generally be used to take undisturbed soil samples for analysis. However, when the site conditions are complex, it becomes a big problem to take undisturbed soil samples for analysis. For example, on steep slopes or high slopes, the drill rig cannot reach the site, the construction conditions for the drill rig are not available, and the drill rig cannot be used to take undisturbed soil samples. In addition, during highway route geological mapping, it is often necessary to take undisturbed soil samples for engineering geological analysis. However, the site conditions are all poor and it is inconvenient to enter and exit. For some sections with better site conditions, in order to take an undisturbed soil sample, a drill rig is called in for sampling, which is extremely costly and very uneconomical in terms of economic benefits and very time-consuming in terms of time benefits.

[0003] At present, there are mainly the following two methods for geotechnical engineering technicians to take Class-I undisturbed soil samples:

[0004] 1. Using drilling equipment, a thin-wall soil sampler is used to take samples by hammering (such as light hammer blows) at the position where the undisturbed soil sample needs to be taken. Usually, the sampling location is generally a site with good conditions, a flat site, and good access conditions for the drill rig. The drill rig should have a drilling operation space.

[0005] 2. Under the condition that the drill rig cannot reach the site, such as on slopes or steep slopes, a hoe or pickaxe is usually used to excavate at the designated sampling position to dig out a large square soil block, and then a small knife is used to slowly shave the dug square soil block into a cylindrical shape with the diameter required for the test.

[0006] For the above two methods of taking undisturbed soil samples, the first method has high requirements for the site, that is, the site is required to be flat and the drill rig can enter and exit conveniently. Secondly, the drilling equipment is heavy and inconvenient to carry; the second method can take samples on slopes or steep slopes, but it is very time-consuming and laborious, the samples taken are irregular, and are easily disturbed.

[0007] When using the device of the present invention to take undisturbed soil samples, the device is light and portable, not restricted by site conditions, can take samples on slopes or steep slopes, is simple to operate, time-saving and labor-saving. Therefore, the device of the present invention is very practical for taking Class-I undisturbed soil samples in cohesive soil, has good creativity, and has a novel and compact design.

[0008] In the existing soil sampling equipment, the sampling sleeve is rotated downward and inserted into the soil by rotating the threaded rod. When it is necessary to extract the sampling sleeve from the soil, the threaded rod needs to be rotated again to drive the sampling sleeve to rotate upward and extract it. However, during the upward rotation of the sampling sleeve, the soil sample is easily disturbed. Based on the above problems, the present invention improves the existing soil sampling equipment, sets the threaded rod and the sampling sleeve to be threadedly connected. When it is necessary to extract the sampling sleeve from the soil, only the threaded rod and the sampling sleeve need to be disassembled, and the parts of the pushing component are replaced, so that the sampling sleeve will not rotate with the threaded rod during the extraction process, and the soil sample will not be disturbed. Summary of the Invention

[0009] In view of the deficiencies of the prior art, the present invention provides a combined device for taking Class I undisturbed cohesive soil samples under complex terrain conditions to solve the problems raised in the above background technology.

[0010] To achieve the above object, the present invention provides the following technical solution: A combined device for taking Class I undisturbed cohesive soil samples under complex terrain conditions, including a U-shaped steel frame, a pushing component and a sampling component;

[0011] The pushing component is provided on the U-shaped steel frame;

[0012] One end of the pushing component is provided with a sampling component.

[0013] Further, the pushing component includes a threaded rod; the threaded rod is connected to the U-shaped steel frame through a threaded connection. One end of the threaded rod is connected with a force adding rod, the other end of the threaded rod is connected with an upper joint, the other end of the upper joint is threadedly connected with a middle joint, and the other end of the middle joint is threadedly connected with a connecting rod.

[0014] Further, a fixing block is provided at the bottom of the connecting rod. A cavity is opened inside the fixing block. An inlay block is provided at the top of the connecting shaft. The inlay block is arranged in the cavity of the fixing block. A hanging ring is provided at the bottom of the connecting shaft.

[0015] Further, the sampling component includes a sampling sleeve; a connecting block is provided at the top of the sampling sleeve, and a lower joint is provided on the connecting block.

[0016] Further, a pin hole is opened on the connecting block. A pin is arranged in the pin hole of the connecting block. Connecting holes are opened at both ends of the pin. Both ends of the bottom of the hanging ring are used for inserting into the connecting holes and fixed by nuts.

[0017] Further, the sampling sleeve is composed of two semi-cylindrical tubes. The tops of the two semi-cylindrical tubes are connected to the bottom of the connecting block through hinges. The bottoms of the two semi-cylindrical tubes are threadedly connected with a cutting ring.

[0018] Further, the cutting ring is a saw-toothed sampling cutting ring.

[0019] Furthermore, the U-shaped steel frame includes a positioning frame, a base, and a steel rod; a positioning frame is provided on the inner wall of the lower part of the U-shaped steel frame, bases are provided at both ends of the bottom of the U-shaped steel frame, and steel rods are provided on the bases.

[0020] Furthermore, fixing holes are provided on the bases, and the steel rods are used to pass through the fixing holes and insert into the soil to fix the U-shaped steel frame.

[0021] Compared with the existing technology, the present invention has the following beneficial effects:

[0022] (1) In the present invention, the cutting ring has a saw-tooth shape, the sampling speed is fast, and it can be freely disassembled and replaced.

[0023] (2) In the present invention, by disassembling the sampling sleeve into two halves, it is convenient to take out the soil sample taken in the sleeve, and the soil sample will not be disturbed.

[0024] (3) When pulling out the sampling sleeve and the cutting ring in the present invention, the connecting rod, the lifting ring, and the pin are installed, so that the threaded rod rotates counterclockwise to drive the connecting rod and the fixing block to rotate. Since the size of the inner wall of the cavity of the fixing block is larger than the inlaid block of the connecting shaft, when the fixing block rotates, it rotates around the inlaid block of the connecting shaft, and will not drive the inlaid block and the connecting shaft to rotate. Therefore, when the threaded rod rotates and moves upward, the inlaid block, the connecting shaft, and the sampling sleeve will not rotate. When the sampling sleeve and the cutting ring are pulled out of the soil by the upward movement of the rotation of the threaded rod, the sampling sleeve together with the soil sample is taken out, which is simple and easy, and will not disturb the soil sample, thus ensuring the quality of the soil sample taken. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a perspective view of the soil sampler after the sampling of the present invention is completed.

[0026] Figure 2 It is an enlarged perspective view of the connecting rod, the lifting ring, and the lifting ring of the present invention.

[0027] Figure 3 It is an enlarged view of the upper joint, the middle part of the joint, and the lower joint of the present invention.

[0028] Figure 4 It is a perspective view of the sampling device of the present invention.

[0029] Figure 5 It is a working principle diagram of the present invention when taking a soil sample.

[0030] Figure 6 It is a working principle diagram of the present invention when lifting the soil sampler.

[0031] Reference numerals: 1, force - adding rod; 2, threaded rod; 21, upper joint; 22, middle part of the joint; 23, lower joint; 2301, connecting block; 2302, pin hole; 3, U - shaped steel frame; 4, sampling sleeve; 5, positioning frame; 6, ring cutter; 7, base; 8, steel drill; 9, connecting rod; 91, fixing block; 92, connecting shaft; 93, inlaid block; 10, lifting ring; 11, lifting ring; 1101, connecting hole; 12, nut. Detailed implementation mode

[0032] As Figure 1 shown, the present invention provides a technical solution: a combined device for taking grade - I undisturbed cohesive soil samples under complex terrain conditions, including a U - shaped steel frame 3, a pushing component and a sampling component;

[0033] A pushing component is provided on the U - shaped steel frame 3;

[0034] One end of the pushing component is provided with a sampling component for collecting sample soil.

[0035] As Figures 2 - 4 shown, among them, the pushing component includes a threaded rod 2; the threaded rod 2 is connected to the U - shaped steel frame 3 through screw threads. One end of the threaded rod 2 is connected to a force - adding rod 1, and the other end of the threaded rod 2 is connected to an upper joint 21. The other end of the upper joint 21 is connected to a middle part of the joint 22 through screw threads, and the other end of the middle part of the joint 22 is connected to a connecting rod 9 through screw threads; the force - adding rod 1 is a hollow tube with a length of 30 cm and a diameter of 2 cm, and the wall thickness is about 0.2 cm; the threaded rod 2 has a diameter of 2 cm, is solid, and has a total length of 37 cm. Among them, the upper part of the threaded rod 2 with threads has a length of 32 cm, and the lower part is 1 cm without threads; the threaded rod 2 is welded to the force - adding rod 1 to form an integral body; the total length of the upper joint 21 is 7 cm and the diameter is 2 cm.

[0036] Among them, a fixing block 91 is provided at the bottom of the connecting rod 9. A cavity is opened inside the fixing block 91. An inlaid block 93 is provided at the top of the connecting shaft 92. The inlaid block 93 is arranged in the cavity of the fixing block 91. A lifting ring 10 is provided at the bottom of the connecting shaft 92; the total length of the connecting rod 9 is 7 cm; the diameter of the lifting ring 10 is 0.3 cm and the total height is 10 cm.

[0037] Among them, the sampling component includes a sampling sleeve 4; a connecting block 2301 is provided at the top of the sampling sleeve 4, and a lower joint 23 is provided on the connecting block 2301; the wall thickness of the sampling sleeve 4 is 0.2 cm, and the total height of the sleeve is 24 cm.

[0038] Among them, a pin hole 2302 is formed on the connection block 2301. The plug pin 11 is arranged in the pin hole 2302 of the connection block 2301. Connection holes 1101 are formed at both ends of the plug pin 11. Both ends of the bottom of the lifting ring 10 are used to be inserted into the connection holes 1101 and fixed by nuts 12; the pin hole 2302 is a solid steel bar, 10 cm long, 0.8 cm in diameter, with a hole at each end, 0.5 cm in diameter.

[0039] Among them, the sampling sleeve 4 is composed of two semi-cylindrical tubes. The tops of the two semi-cylindrical tubes are hinged to the bottom of the connection block 2301. The bottoms of the two semi-cylindrical tubes are threadedly connected with a cutting ring 6.

[0040] Among them, the cutting ring 6 is a saw-toothed sampling cutting ring 6; the inner diameter of the cutting ring 6 of the cutting ring is 12 cm, the wall thickness is 0.2 cm, and the total height is 7 cm.

[0041] Among them, the U-shaped steel frame 3 includes a positioning frame 5, a base 7 and a steel drill 8; a positioning frame 5 is provided on the inner wall of the lower part of the U-shaped steel frame 3. Bases 7 are provided at both ends of the bottom of the U-shaped steel frame 3. A steel drill 8 is provided on the base 7; the upper part of the U-shaped steel frame 3 is a cross beam. The two ends of the cross beam are cuboids with a length of 4 cm, a width of 3 cm and a thickness of 2 cm. The two sides in the middle of the U-shaped steel frame 3 are prismatic bodies. The side length of the small rectangle is 3 cm × 2 cm, the side length of the large rectangle is 6 cm × 2 cm, and the height is 4 cm. The middle section is a cuboid, 10 cm long, 3 cm wide and 2 cm thick. Among them, there is a hole with an inner diameter of 2 cm and internal threads in the middle of the U-shaped steel frame 3. The hole is coupled with the threaded rod 2 through threads; the two sides of the U-shaped steel frame 3 are square brackets, 45 cm high, 3 cm long and 1 cm thick. The upper part is welded to the cross beam to form an integral body. The lower part of the U-shaped steel frame 3 is welded to the base 7 to form an integral body; the base 7 is 6 cm long, 3 cm wide and 1 cm thick, and is used to fix the reaction steel drill 8; the middle part of the positioning frame 5 is a steel bar ring with a diameter of 14 cm. The diameter of the steel bar ring is 0.5 cm. Two steel bars with a diameter of 0.5 cm are symmetrically connected and welded on both sides of the steel bar ring and welded to the U-shaped steel frame 3; the positioning frame 5 is mainly used to position the sampling sleeve 4 when sampling on a slope or a steep bank; the total length of the steel drill 8 is 15 cm, the top diameter is 1 cm, and the bottom is a pointed end.

[0042] Among them, fixing holes are provided on the base 7. The steel drill 8 is used to pass through the fixing holes and insert into the soil to fix the U-shaped steel frame 3.

[0043] As Figures 5 - 6As shown in the figure, the work process is as follows: When sampling is required, first place the U-shaped steel frame 3 at the position where sampling is needed. Then insert the steel drill 8 into the soil through the fixing hole on the base 7 to fix the U-shaped steel frame 3. After fixation, rotate and unscrew the nut 12 from the bottom of the lifting ring 10, and pull out the bottom of the lifting ring 10 from the connection hole 1101 of the bolt 11. Immediately afterwards, pull out the bolt 11 from the pin hole 2302 of the connection block 2301. Then rotate and unscrew the connecting rod 9 from the middle part 22 of the joint, so that the connecting rod 9 is disengaged from the middle part 22 of the joint. Take out the connecting rod 9, the lifting ring 10 and the bolt 11. Then connect the lower joint 23 to the middle part 22 of the joint through the thread. After the connection is completed, rotate the force application rod 1 clockwise to drive the threaded rod 2 to rotate. The threaded rod 2 rotates and cooperates with the thread of the U-shaped steel frame 3, so that the threaded rod 2 rotates clockwise to drive the sampling sleeve 4 to move downward in the positioning frame 5, and insert the cutting ring 6 of the sampling sleeve 4 into the soil. After the sampling sleeve 4 and the cutting ring 6 are inserted into the soil for a certain distance, stop rotating the force application rod 1;

[0044] When it is necessary to pull out the cutting ring 6 of the sampling sleeve 4 from the soil, reinstall the connecting rod 9, the lifting ring 10 and the bolt 11. First, rotate and screw the lower joint 23 into the middle part 22 of the joint, so that the middle part 22 of the joint is disengaged from the lower joint 23. After disengagement, rotate and screw the connecting rod 9 upward around the outside of the middle part 22 of the joint. Then insert the bolt 11 through the pin hole 2302 of the connection block 2301. Immediately afterwards, pass the two ends of the bottom of the lifting ring 10 below the connecting rod 9 through the connection hole 1101 of the bolt 11 and fix them with the nut 12. After the connecting rod 9, the lifting ring 10 and the bolt 11 are reassembled, rotate the force application rod 1 counterclockwise to drive the threaded rod 2 to rotate. The threaded rod 2 rotates and cooperates with the thread of the U-shaped steel frame 3, so that the threaded rod 2 rotates counterclockwise to drive the connecting rod 9 and the fixing block 91 to rotate. Since the size of the inner wall of the cavity of the fixing block 91 is larger than the inlay block 93 of the connecting shaft 92, when the fixing block 91 rotates, it rotates around the inlay block 93 of the connecting shaft 92 and does not drive the inlay block 93 and the connecting shaft 92 to rotate. Therefore, when the threaded rod 2 rotates and moves upward, the inlay block 93, the connecting shaft 92 and the sampling sleeve 4 do not rotate. After the sampling sleeve 4 and the cutting ring 6 are pulled out of the soil by the threaded rod 2 rotating and moving upward;

[0045] After the sampling sleeve 4 and the cutting ring 6 are pulled out of the soil, rotate and screw the nut 12 into the bottom of the lifting ring 10, and pull out the two ends of the bottom of the lifting ring 10 from the connection hole 1101 of the bolt 11, so that the sampling sleeve 4 is disengaged from the threaded rod 2. Take out the sampling sleeve 4 from the U-shaped steel frame 3, peel the sampling sleeve 4 into two halves, take out the original soil inside, and seal and package it with a thin-wall soil sampler.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined device for taking Grade I original clay soil samples under complex terrain conditions, characterized in that: It includes a U-shaped steel frame, a pushing assembly and a sampling assembly; The U-shaped steel frame is provided with a pushing component; A sampling component is provided at one end of the pushing component.

2. The combined device for taking Grade I original clay soil samples under complex terrain conditions according to claim 1, characterized in that: The pushing assembly includes a threaded rod; the threaded rod is arranged on a U-shaped steel frame and connected by a threaded connection, one end of the threaded rod is connected to a force rod, the other end of the threaded rod is connected to an upper handle, the other end of the upper handle is threadedly connected to the middle part of the handle, and the other end of the middle part of the handle is threadedly connected to a connecting rod.

3. The combined device for taking Grade I original clay soil samples under complex terrain conditions according to claim 2, characterized in that: A fixing block is arranged at the bottom of the connecting rod, a cavity is opened inside the fixing block, an inlay block is arranged at the top of the connecting shaft, the inlay block is arranged in the cavity of the fixing block, and a hanging ring is arranged at the bottom of the connecting shaft.

4. The combined device for taking Grade I original clay soil samples under complex terrain conditions according to claim 3, characterized in that: The sampling assembly comprises a sampling sleeve; a connecting block is arranged on the top of the sampling sleeve, and a lower handle is arranged on the connecting block.

5. The combined device for taking Grade I original clay soil samples under complex terrain conditions according to claim 4, characterized in that: The connection block is provided with a pin hole, the plug is arranged in the pin hole of the connection block, both ends of the plug are provided with connection holes, and the two ends of the bottom of the lifting ring are used to be inserted into the connection holes and fixed by nuts.

6. The combined device for taking Grade I original clay soil samples under complex terrain conditions according to claim 5, characterized in that: The sampling sleeve is composed of two semi-cylinders, the tops of the two semi-cylinders are connected to the bottom of the connecting block through hinges, and the bottom threads of the two semi-cylinders are connected with ring cutters.

7. The combined device for taking Grade I original clay soil samples under complex terrain conditions according to claim 6, characterized in that: The ring knife is a saw-shaped sampling ring knife.

8. The combined device for taking Grade I original clay soil samples under complex terrain conditions according to claim 7, characterized in that: The U-shaped steel frame comprises a positioning frame, a base and a steel chisel; the positioning frame is arranged on the inner wall of the lower part of the U-shaped steel frame, bases are arranged at both ends of the bottom of the U-shaped steel frame, and the steel chisel is arranged on the base.

9. The combined device for taking Grade I original clay soil samples under complex terrain conditions according to claim 8, characterized in that: A fixing hole is arranged on the base, and a steel chisel is used to pass through the fixing hole and insert into the soil to fix the U-shaped steel frame.

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