Portable loess undisturbed soil sampling device

Abstract

The utility model application provides a portable loess undisturbed soil sampling device, including telescopic link, pedal, connecting device, sampler outer tube, sampler inner tube, cork screw, sampling drill bit, rubber handle, the telescopic link and sampler outer tube are connected through connecting device, the outer wall of sampler inner tube and the inner wall of sampler outer tube are pasted, and the sampler outer tube is connected through the thread and connecting device, and the inner tube of sampler is connected on connecting device through screw rod, and sampler inner tube is the split design, the cork screw is welded on the outer wall of sampler outer tube, the sampling drill bit is ring cutter sample through thread installation in the lower extreme of sampling cylinder, and its drill bit is the annular continuous blade with. Solve the prior art in the loess high strength, easy to disturb and destroy the undisturbed sample, and the problem that the undisturbed soil sample is not easy to obtain, effectively improve the efficiency of taking loess undisturbed soil, convenient to carry, easy to take out different types of undisturbed soil sample, can satisfy the need of indoor soil test.

Description

Technical Field

[0001] This utility model relates to the field of soil sampling technology, and in particular to a portable loess undisturbed soil sampling device. Background Technology

[0002] One of the key aspects of geotechnical engineering investigation is geotechnical testing. Geotechnical tests provide information on the physical and mechanical properties of soil. Indoor soil samples, obtained through laboratory geotechnical testing, can have parameters such as unit weight, natural void ratio, compressibility coefficient, permeability coefficient, and shear strength measured, providing a basis for engineering design and construction. The most significant factor affecting the results of laboratory geotechnical tests is the degree of disturbance to the undisturbed sample taken; therefore, high-quality tools are required for obtaining undisturbed soil samples.

[0003] Loess is a silty soil formed by wind transport and deposition, mainly distributed in the Loess Plateau region of my country. It exhibits significant structural characteristics and typical genetic features, and its engineering geological properties differ significantly from those of general clayey soils. Loess typically possesses characteristics such as large porosity, high compressibility, low natural water content, and strong structure. While it exhibits high strength in a dry state, its structure is easily damaged after absorbing or soaking in water, leading to a rapid decrease in strength and making it prone to engineering disasters such as collapse, landslides, and mudslides. Due to its loose structure and extreme sensitivity to disturbance, obtaining representative undisturbed soil samples for indoor geotechnical testing presents a significant challenge.

[0004] Currently, existing tools for obtaining undisturbed soil samples are widely used. For cohesive soils, the heavy hammer method or the pressing method is generally employed. However, due to the high strength and susceptibility to disturbance and damage of loess, undisturbed samples obtained using these methods are often significantly disturbed, making it difficult to obtain truly undisturbed soil samples. This results in a significant discrepancy between the measured data and the actual data. Therefore, it is necessary to develop a dedicated undisturbed loess soil sampling device to replace traditional undisturbed soil sampling tools. Utility Model Content

[0005] This application provides a portable loess undisturbed soil sampling device, which solves the problem in the prior art that it is difficult to obtain undisturbed soil samples due to the high strength of loess and the ease with which undisturbed samples can be disturbed. It effectively improves the efficiency of obtaining undisturbed loess soil samples, is easy to carry, and can easily extract different types of undisturbed soil samples, thus meeting the needs of indoor geotechnical testing.

[0006] To achieve the above objectives, this application provides the following technical solution: A portable loess undisturbed soil sampling device includes: a portable rod, a connector, a sampler, and a sampling drill bit; the portable rod includes an upper outer rod and a lower inner rod; one end of the connector is coaxially connected to the lower inner rod, and the other end is provided with a coaxial connecting hole; the sampler includes an outer cylinder and an inner cylinder; the outer cylinder is coaxially connected to the outer ring of the connector; the inner cylinder is coaxially fitted inside the outer cylinder and includes two sets of opening and closing units, which form a cylindrical structure with one open end, and a connector is coaxially provided on the outside of the closed end; the connector is detachably connected to the connecting hole; the sampling drill bit is detachably installed on the end of the outer cylinder away from the connector.

[0007] Furthermore, the two sets of opening and closing units of the sampler inner cylinder have the same structure; the sampler inner cylinder is divided into two opening and closing units based on a plane; the central axis of the sampler inner cylinder is located in the plane.

[0008] Furthermore, two rows of small holes are arranged opposite each other on both sides of the upper outer rod, and a press-type protrusion is provided on the outer wall of the lower inner rod; a spring is provided below the press-type protrusion; the spring is vertically embedded in the lower inner rod, perpendicular to the axial direction of the lower inner rod (1b); the cross-section of the press-type protrusion is semi-circular; the press-type protrusion selectively engages with different small holes to realize the extension and retraction of the portable rod.

[0009] Furthermore, the connector is solid, with one end matching the diameter of the lower inner rod and the other end matching the diameter of the sampler outer cylinder; the connector is coaxially threaded to the lower inner rod and coaxially threaded to the sampler outer cylinder.

[0010] Furthermore, the connecting hole is a threaded hole; the connecting member is a screw; and the connecting hole is threadedly connected to the connecting member.

[0011] Furthermore, the upper outer rod is T-shaped, and the horizontal section of the T-shape is provided with an anti-slip component, which can be a handle made of rubber.

[0012] Furthermore, a row of through holes is provided at the bottom of the lower inner rod; the portable box-type loess undisturbed soil sampling device also includes a foot pedal; the foot pedal adjusts its height according to the different through holes connected by the thread.

[0013] Furthermore, a twisted pattern is welded onto the outer wall of the sampler outer cylinder; the twisted pattern is interwoven and welded onto the outer wall of the sampler outer cylinder.

[0014] Furthermore, one end of the sampling drill bit is provided with an annular continuous blade, and the other end is coaxially threaded to the outer cylinder of the sampler.

[0015] This embodiment of the application adopts a sampler inner cylinder opening and closing setting, with the inner cylinder of the sampler coaxially fitted inside the outer cylinder of the sampler, and all components are connected by threads. This effectively solves the problem that it is not easy to obtain undisturbed soil samples due to the high strength of loess and the ease with which it can be disturbed and damaged. This effectively improves the efficiency of obtaining undisturbed loess soil samples, makes it easy to carry, and makes it easy to extract different types of undisturbed soil samples, thus meeting the needs of indoor geotechnical testing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an overall architecture diagram of the sampler provided in the first embodiment of this application; Figure 2 This is a diagram showing the positional relationship between the sampler and its components provided in the first embodiment of this application. Figure 3 This is a connection diagram of the sampler provided in the first embodiment of this application; Figure 4 A diagram of the outer cylinder of the sampler provided in the first embodiment of this application; Figure 5 A schematic cross-sectional view of the inner cylinder of the sampler provided in the first embodiment of this application; Figure 6 This is a schematic diagram of the inner cylinder of the sampler provided in the first embodiment of this application; Figure 7 A diagram showing the relationship between the sampler inner cylinder and the connecting member provided in the first embodiment of this application; Figure 8 Connection diagram of the components of the sampler provided in the second embodiment of this application Among them, 1. Telescopic rod; 1a. Upper outer rod; 1b. Lower inner rod; 2. Foot pedal; 3. Connecting device; 4. Sampler outer cylinder; 5. Twisted pattern; 6. Sampling drill bit; 7. Rubber handle; 8. Sampler inner cylinder; 9. Connecting piece. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0019] First Embodiment This utility model provides a portable loess undisturbed soil sampling device, such as... Figure 1 As shown, it includes a telescopic rod 1, a foot pedal 2, a connecting device 3, a sampler outer cylinder 4, a sampler inner cylinder 8, a spiral pattern 5, a sampling drill bit 6, and a rubber handle 7; the telescopic rod 1 includes an upper outer rod 1a and a lower inner rod 1b; the top of the upper outer rod 1a is T-shaped, and rubber handles 7 are installed at both ends of the T-shape; two rows of small holes are arranged opposite each other on both sides of the upper outer rod 1a, and a press-type protrusion is provided on the outer wall of the lower inner rod 1b; A spring is installed below the press-type protrusion; the spring is vertically embedded in the lower inner rod 1b, perpendicular to the axis of the lower inner rod 1b; the cross-section of the press-type protrusion is semi-circular; the press-type protrusion selectively engages with different small holes to realize the extension and retraction of the portable rod length, and the combination of the two can arbitrarily adjust the length of the telescopic rod.

[0020] A row of through holes is provided at the bottom of the lower outer rod 1b, and a protruding screw is provided on one side of the foot pedal 2. The height is adjusted by connecting different through holes through the screw. The telescopic rod 1 can be quickly adjusted according to the actual engineering conditions, which is conducive to sampling. The foot pedal 2 design makes it easier to insert the sampler into the loess soil.

[0021] like Figure 3 As shown, the sampler includes an outer cylinder 4 and an inner cylinder 8. The outer cylinder 4 is a hollow structure with openings at both ends. The inner cylinder 8 is coaxially fitted inside the outer cylinder 4. During installation, a small amount of petroleum jelly can be applied inside the outer cylinder 4 to increase lubrication and make disassembly and installation easier.

[0022] like Figure 6 As shown, the sampler inner cylinder 8 includes two sets of opening and closing units, which together form a cylindrical structure with one end open. A connector 9 is coaxially arranged outside the closed end; the connector 9 is threadedly connected to the connecting hole. The connecting device 3 is solid; one end of the connecting device 3 is connected to the lower inner rod 1b by a thread for easy disassembly; the other end of the connecting device 3 is matched with the diameter of the sampler outer cylinder 4 by a thread. like Figure 7 As shown, the bottom of the connecting device 3, which connects to the outer cylinder 4 of the sampler, is provided with a connecting hole; the connecting hole is threadedly connected to the connecting piece 9 outside the inner cylinder of the sampler, so that the two will not fall off or separate during the drilling and sampling process.

[0023] like Figure 6As shown, the connecting device 3 connects to the connecting piece 9 outside the sampler inner cylinder 8 via the connecting hole to fix the two opening and closing units of the sampler inner cylinder 8 together; the inner wall of the sampler outer cylinder 4 fits against the outer wall of the sampler inner cylinder 8 to increase the stability of the sampler inner cylinder 8; after the underground sampling is completed, the sampler outer cylinder 4 is removed, the connecting device 3 is disassembled, and the sampler inner cylinder 8 is separated on both sides to obtain a complete soil sample. like Figure 4 As shown, the outer wall of the sampler outer cylinder 4 is welded with a twisted pattern 5, which is interwoven and welded together. Because the twisted pattern 5 is relatively sharp, it cuts the soil around the sampler during the downward drilling process, making the surrounding soil loose, which makes it easier to pull the sampler out of the loess after sampling.

[0024] like Figure 1 As shown, the sampling drill bit 6 is a ring cutter type, which is installed at the lower end of the outer cylinder 4 of the sampler by thread. Its drill bit has a ring continuous blade, which can make it easier to drill the sampler into the loess and make it easier to drill and sample.

[0025] Second Embodiment like Figure 8 As shown, one end of the connecting device 3 and the two components of the lower inner rod 1b have through holes at the same corresponding positions. During assembly, the pin can be inserted into the through holes of the two components, and the two components can be fixed relative to each other through the cooperation of the pin and the through holes. The diameter of the connecting hole at the bottom of the other end of the connecting device 3 matches the diameter of the connecting piece 9 outside the inner cylinder 8 of the sampler, and the depth of the connecting hole matches the length of the connecting piece 9; the outer cylinder 4 of the sampler wraps around the connecting piece 9 and fits against the inner wall of the inner cylinder 8 of the sampler, and the outer cylinder 4 of the sampler, the connecting piece 9 and the inner cylinder 8 of the sampler are fitted together; there are through holes at the corresponding positions of the kit, and the pin can be inserted into the through hole of the kit during assembly, and the relative fixation of the two kits is achieved by the cooperation of the pin and the through hole; During sampling, hold the rubber handle 7 while keeping the sampler perpendicular to the loess surface. Place the sampling drill bit 6 firmly against the loess sampling location surface, using the foot pedal 2 for leverage. Slowly rotate the rubber handle 7 downwards to allow the sampling drill bit 6 to penetrate the loess. During drilling, the sampler remains perpendicular to the loess surface. The spiral pattern 5 on the outer wall of the sampler's outer cylinder 4 cuts through the surrounding soil, making the soil around the sampler more loose. When the loess sample fills the entire sampler, i.e., the top surface of the sampler is located... When the sampler reaches the surface of the loess, stop rotating. Since the surrounding soil has become loose, the sampler can be slowly lifted out of the soil surface. Rotate the sampling drill bit 6 to separate it from the outer cylinder 4 of the sampler. Rotate the outer cylinder 4 of the sampler to separate it from the inner cylinder 8 of the sampler. Rotate the telescopic rod 1 to separate it from the connecting device 3. The inner cylinder 8 of the sampler is fixed by the connecting device 3 and remains stable, which prevents the soil sample in the inner cylinder 8 from swinging due to drilling into the soil, thereby reducing its disturbance and maintaining its stability.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A portable loess undisturbed soil sampling device, characterized in that, include: Portable rod (1), connecting device (3), sampler and sampling drill bit (6); the portable rod (1) includes an upper outer rod (1a) and a lower inner rod (1b); One end of the connecting device (3) is coaxially connected to the lower inner rod (1b), and the other end is provided with a coaxial connecting hole; The sampler includes an outer cylinder (4) and an inner cylinder (8); the outer cylinder (4) is coaxially connected to the connecting device (3); the inner cylinder (8) is coaxially fitted inside the outer cylinder (4); The inner cylinder (8) of the sampler includes two sets of opening and closing units, which form a cylindrical structure with one end open. A connector (9) is coaxially arranged on the outside of the closed end. The connector (9) is detachably connected to the connecting hole. The sampling drill bit (6) is detachably mounted on the end of the sampler outer cylinder (4) away from the connecting device (3).

2. The portable loess undisturbed soil sampling device according to claim 1, characterized in that, The two sets of opening and closing units of the sampler inner cylinder (8) have the same structure; the sampler inner cylinder (8) is divided into two opening and closing units based on a plane; the central axis of the sampler inner cylinder (8) is located in the plane.

3. The portable loess undisturbed soil sampling device according to claim 1, characterized in that, The upper outer rod (1a) has two rows of small holes on its two sides, and the lower inner rod (1b) has a pressing protrusion on its outer wall; a spring is provided below the pressing protrusion; the spring is embedded in the lower inner rod (1b) and is perpendicular to the axial direction of the lower inner rod (1b); the cross-section of the pressing protrusion is semi-circular. The press-type protrusion selectively engages with different small holes to achieve the length extension and retraction of the portable rod (1).

4. The portable loess undisturbed soil sampling device according to claim 1, characterized in that, The connecting device (3) is solid, with one end matching the diameter of the lower inner rod (1b) and the other end matching the diameter of the sampler outer cylinder (4); the connecting device (3) is coaxially threaded to the lower inner rod (1b); the connecting device (3) is coaxially threaded to the sampler outer cylinder (4).

5. A portable loess undisturbed soil sampling device according to claim 1, characterized in that, The connecting hole is a threaded hole; the connecting part (9) is a screw; the connecting hole is threadedly connected to the connecting part (9).

6. A portable loess undisturbed soil sampling device according to claim 3, characterized in that, The top of the upper outer rod (1a) is T-shaped.

7. A portable loess undisturbed soil sampling device according to claim 3, characterized in that, The bottom of the lower inner rod (1b) is provided with a row of through holes.

8. A portable loess undisturbed soil sampling device according to claim 7, characterized in that, The portable loess undisturbed soil sampling device also includes a foot pedal (2), which adjusts its height according to the different through holes connected by the thread.

9. A portable loess undisturbed soil sampling device according to claim 1, characterized in that, The outer wall of the sampler outer cylinder (4) is welded with a twisted pattern (5); the twisted pattern (5) is cross-wound and welded to the outer wall of the sampler outer cylinder (4).

10. A portable loess undisturbed soil sampling device according to claim 1, characterized in that, The sampling drill bit (6) is provided with an annular continuous blade at one end and is coaxially threaded to the outer cylinder of the sampler at the other end.

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