A seasonal frozen soil soil profile soil sampling device

Abstract

The utility model relates to soil profile sampling device technical field, and disclose a kind of seasonal frozen ground soil profile soil sampling device, including support column, the one end of support column is fixedly arranged with soil sampler, the upper end of support column is fixedly arranged with fixed groove, the upper end of support column is fixedly arranged with fixed clamping block, one side of support column is fixedly arranged with semicircular cross arm, one end of semicircular cross arm is fixedly arranged with mounting bolt.This seasonal frozen ground soil profile soil sampling device fundamentally avoids the load disturbance and collapse risk caused by personnel down pit, and the sampler of half-opened oblique mouth design can quickly cut into frozen and thawed layer soil under the premise of maintaining the original structure of soil, solves the problem that traditional spiral sampler is easily blocked in sticky wet soil, disturbs sample, realizes safe, efficient, low disturbance soil sample collection in narrow profile space.

Description

Technical Field

[0001] This utility model relates to the technical field of soil profile sampling devices, specifically a soil sampling device for seasonal frozen soil profiles. Background Technology

[0002] Soil, as a natural resource, is the environment upon which vegetation, soil animals, and microorganisms depend for survival. It plays an irreplaceable role in the material cycle, energy conversion, and environmental purification of ecosystems. Soil profiles contain rich physical, chemical, and biological information. Data on their structural characteristics, nutrient distribution, and pollutant content are important foundations for agricultural production management, environmental protection assessment, ecological restoration projects, and geological disaster early warning. Traditional soil profile sampling methods mostly rely on manual excavation of the profile followed by stratified sampling, which suffers from high labor intensity, low sampling efficiency, significant profile disturbance, and difficulty in achieving continuous sampling at fixed points. These limitations are particularly pronounced in complex terrain areas or large-scale soil surveys. Developing a sampling device that is easy to operate, accurate in sampling, and can effectively maintain the integrity of the soil profile structure is of great significance for improving the scientific nature and application value of soil research.

[0003] This invention discloses a soil sampling device for seasonally frozen soil profiles, mainly addressing the challenge of soil profile sampling in seasonally frozen soil regions. In these regions, due to the short and limited freeze-thaw window, soil sampling can typically only be conducted from May to September each year. This period coincides with the freeze-thaw transition, significantly reducing soil cohesion and making it highly susceptible to collapse when manually excavating soil profiles. To prevent or reduce the risk of collapse, the conventional approach is to excavate circular profile pits. However, this leads to significant water seepage at the bottom of the profile, further increasing the difficulty of soil sample collection. The ever-present risk of collapse and continuous water seepage prevents operators from descending into the profile pit to collect samples, severely hindering the development of soil profile research in this region. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The purpose of this invention is to provide a soil sampling device for seasonal frozen soil profiles to solve the problem of soil profile sampling in seasonal frozen soil areas mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a soil sampling device for seasonal frozen soil profiles, comprising a support column, a soil sampler fixedly installed at one end of the support column, a fixing groove fixedly installed at the upper end of the support column, a fixing block fixedly installed at the upper end of the support column, a semi-circular cross arm fixedly installed on one side of the support column, and an installation bolt fixedly installed at one end of the semi-circular cross arm.

[0008] As a further embodiment of this utility model: a fixing cover is fixedly provided at the upper end of the support column, and a fixing cylinder is fixedly provided at the upper end of the fixing cover.

[0009] As a further embodiment of this utility model: a connecting rod is fixedly provided at the upper end of the fixed cylinder, and a buffer cylinder is fixedly provided at the upper end of the connecting rod.

[0010] As a further embodiment of this utility model: a connecting end is fixedly provided at the upper end of the connecting rod, an installation cylinder is fixedly provided at the upper end of the connecting end, and an operating handle is fixedly provided at the upper end of the installation cylinder.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This seasonally frozen soil profile sampling device addresses the core challenge of soil profile sampling in seasonally frozen soil areas by adopting a "non-contact suspended sampling" design concept. Given the extremely poor stability of seasonally frozen soil profiles during freeze-thaw cycles, manually excavated profile pits typically only maintain a safe operating width of 0.8–1.2 m. Traditional long-handled sampling devices (often ≥1.5 m in length) suffer from insufficient operating radius and are prone to collapsing due to contact with pit walls in confined spaces. This invention innovatively designs the sampling execution end as a 180° semi-circular horizontal arm structure, coupled with a 180 cm long vertical operating handle, allowing the operator to stand on the ground at the edge of the profile pit and use the semi-circular... The arc of the crossarm is adapted to the curved inner wall of the profile pit, enabling suspended operation with the pit wall as the support reference. The three semi-opening angled samplers evenly distributed on the crossarm can simultaneously collect soil samples from different locations on the profile in a single operation. Multi-point sampling can be completed without personnel entering the pit, fundamentally avoiding the load disturbance and collapse risks caused by personnel entering the pit. The semi-opening angled sampler can quickly cut into the freeze-thaw layer soil by horizontal pushing while maintaining the original soil structure. It solves the problem of traditional spiral samplers being prone to clogging and disturbing samples in sticky and wet soil, realizing safe, efficient and low-disturbance soil sample collection in narrow profile space.

[0013] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the semi-circular crossarm structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the connecting rod structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the operating handle structure of this utility model.

[0018] In the diagram: 1. Support column; 2. Soil sampler; 3. Fixing groove; 4. Fixing block; 5. Semi-circular cross arm; 6. Mounting bolt; 7. Fixing cover; 8. Fixing cylinder; 9. Connecting rod; 10. Buffer cylinder; 11. Connecting end; 12. Mounting cylinder; 13. Operating handle. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a soil sampling device for seasonal frozen soil profile, including a support column 1, a soil sampler 2 fixedly installed at one end of the support column 1, a fixing groove 3 fixedly installed at the upper end of the support column 1, a fixing block 4 fixedly installed at the upper end of the support column 1, a semi-circular cross arm 5 fixedly installed on one side of the support column 1, and an installation bolt 6 fixedly installed at one end of the semi-circular cross arm 5.

[0021] A fixing cover 7 is fixedly installed at the upper end of the support column 1, and a fixing cylinder 8 is fixedly installed at the upper end of the fixing cover 7.

[0022] A connecting rod 9 is fixedly installed at the upper end of the fixed cylinder 8, a buffer cylinder 10 is fixedly installed at the upper end of the connecting rod 9, a connecting end 11 is fixedly installed at the upper end of the connecting rod 9, an installation cylinder 12 is fixedly installed at the upper end of the connecting end 11, and an operating handle 13 is fixedly installed at the upper end of the installation cylinder 12.

[0023] Working principle: First, after the soil profile is excavated, clean the loose soil on the profile wall to ensure that the pit wall is vertical. If there are local loose areas, temporary support can be provided by wooden boards. (2) According to the target sampling depth, assemble the operating handle 13 through the threaded interface, adjust the total length to 180cm, and use a level to calibrate the verticality of the handle. 2. Profile marking: (1) Use a tape measure to measure upward from the bottom baseline of the profile. Draw horizontal marking lines on the profile wall with a marker according to the preset sampling layers. The line width is 2cm and the length is 30cm. Ensure that each marking line is parallel and horizontal with the ground. (2) Mark the layer number next to the marking line for easy identification during sampling. 3. Layered sampling: (1) The operator stands in a safe area of ​​1m at the edge of the profile pit, holds the non-slip handle at the top of the handle with both hands, and puts the arc surface of the semi-circular horizontal arm 5 against the inner wall of the profile pit so that the 45° of the 3 samplers Align the beveled end with the marking lines of layers ③, ②, and ① respectively. (2) Keep the horizontal arm horizontal and apply horizontal thrust by exerting force from the waist to push the sampler into the soil at a constant speed until the sampler is fully inserted. At this time, the half-open slot should face upward to avoid sample falling off. (3) Slowly rotate the handle counterclockwise by 15°. After pulling out the device, observe the integrity of the soil core inside the sampler. 4. Sample collection and marking: (1) Align the sampler with the opening of the self-sealing bag and use a stainless steel scraper to scrape the soil core completely into the bag along the half-open groove. Each sample corresponds to one self-sealing bag. (2) Mark the following on the surface of the self-sealing bag with a waterproof marker: profile number, sampling layer, sampling date, sampler and soil type. After folding the bag opening, seal it with a sealing clip. 5. Repeat sampling: (1) If it is necessary to collect samples from deeper layers, the handle connecting rod 9 can be disassembled to shorten the length. Adjust the marking line according to the above steps and then operate. (2) When the same layer of sample needs to be collected repeatedly, move the device horizontally by 5-10cm to avoid the disturbance of the soil structure caused by the previous sampling. 6. Device cleaning: After a single profile sampling is completed, clean the residual soil inside the sampler with a hard brush and wipe it with 75% alcohol cotton pads to prevent cross-contamination of samples.

[0024] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A soil sampling device for seasonally frozen soil profiles, comprising a support column (1), characterized in that: A soil sampler (2) is fixedly installed at one end of the support column (1), a fixing groove (3) is fixedly installed at the upper end of the support column (1), a fixing block (4) is fixedly installed at the upper end of the support column (1), a semi-circular cross arm (5) is fixedly installed on one side of the support column (1), and an installation bolt (6) is fixedly installed at one end of the semi-circular cross arm (5).

2. The soil sampling device for seasonal frozen soil profiles according to claim 1, characterized in that: The upper end of the support column (1) is fixedly provided with a fixing cover (7), and the upper end of the fixing cover (7) is fixedly provided with a fixing cylinder (8).

3. The soil sampling device for seasonal frozen soil profiles according to claim 2, characterized in that: A connecting rod (9) is fixedly installed at the upper end of the fixed cylinder (8), and a buffer cylinder (10) is fixedly installed at the upper end of the connecting rod (9).

4. A soil sampling device for seasonally frozen soil profiles according to claim 3, characterized in that: The upper end of the connecting rod (9) is fixedly provided with a connecting end (11), the upper end of the connecting end (11) is fixedly provided with an installation cylinder (12), and the upper end of the installation cylinder (12) is fixedly provided with an operating handle (13).

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