Device for sampling undisturbed soil sample extremely easy to disturb

Abstract

The invention provides a device for sampling an undisturbed soil sample extremely easy to disturb, the device comprises a square damping outer box and a cylindrical sampling inner barrel, the cylindrical sampling inner barrel is placed in the square damping outer box, the cylindrical sampling inner barrel and the square damping outer box are connected through a damping device, and the damping device is arranged in the square damping outer box. The square shock-absorbing outer box comprises a shock-absorbing outer box main body and a shock-absorbing outer box upper cover, the bottom of the shock-absorbing outer box main body is closed, the top of the shock-absorbing outer box main body is open, and the top of the shock-absorbing outer box upper cover is closed and the bottom of the shock-absorbing outer box upper cover is open; the damping outer box is horizontally placed, liquid thermo-sensitive hydrogel is introduced from the damping solution inlet until the thermo-sensitive hydrogel overflows from the damping solution outlet, and the damping solution inlet is closed; putting a constant-temperature heating rod from the damping solution outlet, controlling the temperature of the constant-temperature heating rod to enable the temperature-sensitive hydrogel to form a condensed state, and closing the damping solution outlet.

Description

[0001] This application is a divisional application. The name of the parent application is: A device and method for taking easily disturbed original soil samples, application number: 202310376438.9, application date: April 10, 2023. Technical Field

[0002] The invention relates to the field of geotechnical engineering, and in particular to a device and method for taking an original soil sample which is easily disturbed. Background Art

[0003] Obtaining the physical and mechanical properties of in-situ geotechnical materials is of great engineering significance for the design, construction and subsequent maintenance of geotechnical engineering. For geotechnical materials with stable and firm connections between particles, such as hard geotechnical materials such as loess, expansive soil, and rock, large blocks of rock and soil can be directly cut on site, tightly packaged and transported to the laboratory, and then the physical and mechanical properties of in-situ geotechnical materials can be obtained through indoor tests. However, for geotechnical materials with extremely weak connections between particles, such as sandy soil and volcanic ash soil, it is very easy to be disturbed during sampling and transportation, the initial structure of the original soil is destroyed, the soil is loose or even liquefied, and the physical and mechanical properties cannot be obtained indoors. Therefore, the sampling method of original soil that is easily disturbed has always been a technical problem.

[0004] In order to accurately obtain the physical and mechanical properties of undisturbed soil samples that are easily disturbed, the main measures currently taken are: 1. Moving indoor instruments to the site for testing, but this method consumes a lot of manpower, material and financial resources, and is not suitable for tests using high-precision large-scale instruments and equipment; 2. Preparing undisturbed samples on site and tightly fixing them with metal molds that fit the size of the samples, but this method has a very high sample loss rate during transportation.

[0005] Therefore, it is necessary to design a special device and method for sampling easily disturbed original soil. For example, the Chinese utility model patent with patent number CN202020349433.9 discloses an on-site original sand sampler. The invention designs a handle, an outer cylinder, a push rod, a soil cylinder and a blade opening and closing valve. After completing the sand sampling, the lower end of the soil cylinder is closed by closing the blade start valve to ensure that the sand does not leak back during the sampling process. For another example, the Chinese utility model patent with patent number CN202221965707.2 discloses a new type of original sandy soil sampling packaging device. The invention designs a double-layer square sampling device, which is composed of multiple sampling inner cylinders and sampling outer shells. By setting the hollow area of ​​the inner cylinder and the outer shell, the folding crawler and the fixed pulley system, it is ensured that the sand is disturbed as little as possible during the sampling process. For another example, the Chinese invention patent with application number CN202110719777.3 discloses a sampling and curing system and method for original sand. The invention designs a sampling bracket, a sampling tube, a permeation tube, a storage tube and a curing oven. The original sand sample is pre-cured by a temperature-sensitive resin to ensure that the initial structure of the sand does not change, thereby preserving the original sand sample for a long time.

[0006] The existing public technology mainly focuses on simplifying the sampling process and how to avoid disturbing the soil sample during the sampling process. The relevant instruments and sampling methods are designed, but the destruction of the initial structure of the soil is very likely to occur during the transportation of the sample. Alternatively, a solidifying agent is injected into the pores of the soil sample to solidify the sample in advance, but this method cannot obtain the physical and mechanical properties of the in-situ sand sample.

[0007] Therefore, technicians in this field are committed to developing a device and method for taking undisturbed soil samples that are extremely easy to disturb. Summary of the invention

[0008] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to simplify the sampling operation of the undisturbed soil which is very easy to be disturbed, and to ensure that the undisturbed soil sample is not disturbed during the sampling and transportation process.

[0009] To achieve the above object, the present invention provides a device for taking undisturbed soil samples, the device comprising a square shock-absorbing outer box and a cylindrical sampling inner cylinder, the cylindrical sampling inner cylinder is placed inside the square shock-absorbing outer box, the cylindrical sampling inner cylinder and the square shock-absorbing outer box are connected by a shock-absorbing device, wherein:

[0010] The square shock-absorbing outer box completes the sealing of the original soil sample, and includes a shock-absorbing outer box body and a shock-absorbing outer box upper cover. The shock-absorbing outer box body is closed at the bottom and open at the top, and the shock-absorbing outer box upper cover is closed at the top and open at the bottom. The shock-absorbing outer box upper cover is tightly buckled on the shock-absorbing outer box body through a fastening device;

[0011] The cylindrical sampling inner cylinder completes the sampling and sealing of the original soil sample, and includes two half-side cylinder surfaces and two sampling inner cylinder top covers. The two half-side cylinder surfaces can be spliced ​​into a cylindrical cylinder with the bottom and top surfaces completely open. The top of the sampling inner cylinder top cover is closed and the bottom is open; the two sampling inner cylinder top covers are tightly buckled on the top and bottom of the two half-side cylinder surfaces through a fastening device.

[0012] Furthermore, the shock-absorbing outer box upper cover and the shock-absorbing outer box main body are tightly connected by bolts, and a sealing rubber gasket is arranged at the contact position between the shock-absorbing outer box upper cover and the shock-absorbing outer box main body; the two sampling inner cylinder top covers and the two half-side cylinder surfaces are tightly connected by bolts, and a sealing rubber gasket is arranged at the contact position between the sampling inner cylinder top cover and the cylinder surface.

[0013] Furthermore, a cylindrical first shock-absorbing bracket and a first shock-absorbing spring are arranged at the center of the inner bottom surface and four side surfaces of the shock-absorbing outer box body, one end of the first shock-absorbing spring is fixed to the first shock-absorbing bracket, and the other end of the first shock-absorbing spring is a free end; a cylindrical second shock-absorbing bracket and a second shock-absorbing spring are arranged at the center of the inner top of the shock-absorbing outer box upper cover, one end of the second shock-absorbing spring is fixed to the second shock-absorbing bracket, and the other end of the second shock-absorbing spring is a free end.

[0014] Furthermore, a shock-absorbing solution inlet is provided at the bottom of the side of the shock-absorbing outer box body, and a shock-absorbing solution outlet is provided at the top of the upper cover of the shock-absorbing outer box.

[0015] Furthermore, the inner bottom surface of the shock-absorbing outer box body is 400×400mm2, the inner height is 500mm, and the thickness is 4mm; the inner top surface of the shock-absorbing outer box cover is 408×408mm2, the inner height is 50mm, and the thickness is 4mm; the first shock-absorbing bracket is 30mm high, 40mm in outer diameter, and 4mm in thickness; the second shock-absorbing bracket is 30mm high, 40mm in outer diameter, and 5mm in thickness.

[0016] Furthermore, the half-side cylinder surface includes two fan-shaped cylindrical third shock-absorbing brackets, the center height of the third shock-absorbing brackets is set at the center position of the half-side cylinder surface, and the horizontal position of the third shock-absorbing brackets is set at 45° and 135° clockwise from the center angle of the half-side cylinder surface; the sampling inner cylinder top cover is provided with a fourth shock-absorbing bracket, and the fourth shock-absorbing bracket is set at the center of the outer top surface of the sampling inner cylinder top cover.

[0017] Furthermore, the height of the cylindrical cylinder after the two half side cylinder surfaces are spliced ​​together is 300mm, the inner diameter is 200mm, and the thickness is 4mm; the inner top surface diameter of the sampling inner cylinder top cover is 208mm, the inner height is 50mm, and the thickness is 4mm; the height of the third shock-absorbing bracket and the fourth shock-absorbing bracket is 50mm, the outer diameter is 40mm, and the thickness is 5mm.

[0018] On the other hand, the present invention also provides a method for taking an extremely easily disturbed undisturbed soil sample, characterized in that the undisturbed soil sample is taken using the above-mentioned device for taking an extremely easily disturbed undisturbed soil sample, and the method comprises the following steps:

[0019] S101: applying vaseline on the inner surfaces of the two half-side cylinder surfaces and the inner surfaces of the top covers of the two sampling inner cylinders, and taking the original soil sample;

[0020] S103: tightly buckle the top cover of the sampling inner cylinder onto the top and bottom of the two half-side cylinder surfaces, fix the screws and tighten them, and apply vaseline on the contact position;

[0021] S105: align the fourth shock-absorbing bracket at the bottom of the cylindrical sampling inner cylinder with the free end of the first shock-absorbing spring at the bottom of the shock-absorbing outer box body, align the lower notch of the third shock-absorbing bracket on the side of the cylindrical sampling inner cylinder with the free end of the first shock-absorbing spring on the side of the shock-absorbing outer box body, and press down the cylindrical sampling inner cylinder so that the cylindrical sampling inner cylinder is supported by the first shock-absorbing spring;

[0022] S107: Align the free end of the second shock-absorbing spring of the shock-absorbing outer box upper cover with the fourth shock-absorbing bracket on the top of the cylindrical sampling inner tube, tightly buckle the shock-absorbing outer box upper cover on the top of the shock-absorbing outer box body, and fix and tighten the screws;

[0023] S109: placing the shock-absorbing outer box horizontally, introducing liquid thermosensitive hydrogel from the shock-absorbing solution inlet until the thermosensitive hydrogel overflows from the shock-absorbing solution outlet, and sealing the shock-absorbing solution inlet; inserting a constant temperature heating rod from the shock-absorbing solution outlet, controlling the temperature of the constant temperature heating rod to make the thermosensitive hydrogel form a condensed state, and sealing the shock-absorbing solution outlet;

[0024] S111: transporting the device to a laboratory and storing it at 30-35° C.;

[0025] S113: When using a soil sample, take out the cylindrical sampling inner cylinder from the square shock-absorbing outer box, and remove the two sampling inner cylinder top covers and the two half side cylinder surfaces.

[0026] Furthermore, the step S101 includes the following steps:

[0027] S1011: Determine the location where soil samples are to be taken. First, remove the surface soil with a shovel to expose the fresh section. Excavate to a depth of about 0.5m.

[0028] S1012: Use a shovel to trim the rough outline of the intended sample on the upper, left, right, front and back sides of the intended sampling position, and gently place the two half-side cylinder surfaces that form a cylindrical shape on the top of the intended soil sample;

[0029] S1013: using a thin-cut soil knife to cut a soil sample slightly larger than the half-side cylinder surface along the periphery of the half-side cylinder surface, and pressing the half-side cylinder surface vertically downward;

[0030] S1014: Repeat step S1013 until the soil sample extends out of the upper edge of the half-side cylinder surface, and then level the upper and lower parts of the soil sample of the half-side cylinder surface.

[0031] Furthermore, in the step S109, the temperature of the heating rod is controlled to 35°C so that the thermosensitive hydrogel forms a condensed state; the thermosensitive hydrogel is Pluronic F127 thermosensitive hydrogel, and the heating power of the constant temperature heating rod is 200W.

[0032] In a preferred embodiment of the present invention, the present invention has the following beneficial effects compared with the prior art:

[0033] 1. The device provided by the present invention is a device for taking undisturbed soil samples, which is very easy to disturb. The double-layer soil sampling device is designed, and the inner cylinder and the outer box are connected by a shock absorber and filled with a temperature-sensitive hydrogel, so as to ensure that the undisturbed soil samples are not disturbed during the sampling and transportation process, and the initial structure of the undisturbed soil body is not destroyed, so that the physical and mechanical properties can be obtained indoors;

[0034] 2. The present invention can be used to sample undisturbed soil that is easily disturbed, is simple to operate, and can be widely promoted and used.

[0035] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of a device for taking easily disturbed undisturbed soil samples according to a preferred embodiment of the present invention;

[0037] Figure 2 A schematic cross-sectional view of a device for taking an easily disturbed original soil sample according to a preferred embodiment of the present invention;

[0038] Figure 3 A schematic diagram of a shock-absorbing outer box body according to a preferred embodiment of the present invention;

[0039] Figure 4A schematic cross-sectional view of a shock-absorbing outer box body according to a preferred embodiment of the present invention;

[0040] Figure 5 A schematic diagram of a shock-absorbing outer box upper cover according to a preferred embodiment of the present invention;

[0041] Figure 6 A schematic diagram of a cylindrical sampling inner tube according to a preferred embodiment of the present invention;

[0042] Figure 7 A schematic diagram of a half side cylinder surface of a preferred embodiment of the present invention;

[0043] Figure 8 A schematic diagram of the top surface of the sampling inner cylinder cover of a preferred embodiment of the present invention;

[0044] Fig. 9 A schematic diagram of the bottom surface of the top cover of the sampling inner cylinder of a preferred embodiment of the present invention;

[0045] Fig.10 This is a flow chart of a method for taking an undisturbed soil sample that is extremely easy to disturb, in accordance with a preferred embodiment of the present invention.

[0046] Among them, 1-shock-absorbing outer box body, 2-shock-absorbing outer box upper cover, 3a-shock-absorbing solution inlet, 3b-shock-absorbing solution outlet, 4a-first bolt hole, 4b-second bolt hole, 5a-first shock-absorbing bracket, 5b-first shock-absorbing spring, 6a-second shock-absorbing bracket, 6b-second shock-absorbing spring, 7-half side cylinder surface, 8-sampling inner cylinder top cover, 9-third shock-absorbing bracket, 10a-third bolt hole, 10b-bolt hole, 11-fourth shock-absorbing bracket. DETAILED DESCRIPTION

[0047] The following describes several preferred embodiments of the present invention with reference to the drawings in the specification, so that the technical content is clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned in the text.

[0048] In the drawings, components with the same structure are indicated by the same numerical reference numerals, and components with similar structures or functions are indicated by similar numerical reference numerals. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of the components is appropriately exaggerated in some places in the drawings.

[0049] like Figure 1 , Figure 2As shown, an embodiment of the present invention provides a device for sampling undisturbed soil samples that are easily disturbed, including a square shock-absorbing outer box and a cylindrical sampling inner cylinder. The cylindrical sampling inner cylinder is placed inside the square shock-absorbing outer box, and the cylindrical sampling inner cylinder and the square shock-absorbing outer box are connected by a shock-absorbing device. The device is designed with a double-layer soil sampling device, in which the cylindrical sampling inner cylinder and the square shock-absorbing outer box are connected according to a shock absorber and filled with temperature-sensitive hydrogel, so as to achieve sampling of undisturbed soil that is easily disturbed. The operation is simple and ensures that the undisturbed soil sample is not disturbed during the sampling and transportation process.

[0050] like Figure 1 , Figure 2 As described, the square shock-absorbing outer box completes the sealing of the original soil sample, and includes a shock-absorbing outer box main body 1 and a shock-absorbing outer box upper cover 2. The shock-absorbing outer box main body 1 is closed at the bottom and open at the top; the shock-absorbing outer box upper cover 2 is closed at the top and open at the bottom, and the shock-absorbing outer box upper cover 2 is tightly buckled on the shock-absorbing outer box main body 1 through a fastening device. The shock-absorbing outer box main body 1 and the shock-absorbing outer box upper cover 2 are tightly connected by bolts, and two bolts are arranged at equal intervals on each side of the outer box, for a total of 8 bolts. At the positions corresponding to the bolts, the shock-absorbing outer box main body 1 and the shock-absorbing outer box upper cover 2 are respectively provided with a first bolt hole 4a and a second bolt hole 4b. A shock-absorbing solution inlet 3a is arranged at the bottom of the side of the shock-absorbing outer box main body 1, and a shock-absorbing solution outlet 3b is arranged at the top of the shock-absorbing outer box upper cover 2. As Figure 3 , Figure 4 As shown, a cylindrical first shock absorbing bracket 5a and a first shock absorbing spring 5b are arranged at the center of the inner bottom surface and four side surfaces of the shock absorbing outer box body 1, one end of the first shock absorbing spring 5b is fixed to the first shock absorbing bracket 5a, and the other end of the first shock absorbing spring 5b is a free end; Figure 5 As shown, a cylindrical second shock absorbing bracket 6a and a second shock absorbing spring 6b are arranged at the exact center position of the top of the shock absorbing outer box upper cover 2, one end of the second shock absorbing spring 6b is fixed to the second shock absorbing bracket 6a, and the other end of the second shock absorbing spring 6b is a free end.

[0051] In a preferred embodiment of the present invention, the inner bottom surface of the shock-absorbing outer box body 1 is 400×400mm2, the inner height is 500mm, and the thickness is 4mm; the inner top surface of the shock-absorbing outer box upper cover 2 is 408×408mm2, the inner height is 50mm, and the thickness is 4mm; the first shock-absorbing bracket 5a is 30mm high, 40mm in outer diameter, and 4mm in thickness; the second shock-absorbing bracket 6a is 30mm high, 40mm in outer diameter, and 5mm in thickness.

[0052] like Figure 2 , Figure 6 The cylindrical sampling inner cylinder completes the sampling and sealing of the original soil sample, and includes two half-side cylinder surfaces 7 and two sampling inner cylinder top covers 8. The two half-side cylinder surfaces 7 can be spliced ​​into a cylindrical cylinder with the bottom and the top completely open, such as Figure 7As shown, the top cover 8 of the sampling inner cylinder is closed at the top and open at the bottom. Figure 8 , Fig. 9 As shown. The two sampling inner cylinder top covers 8 are tightly buckled on the top and bottom of the two half-side cylinder surfaces 7 through fastening devices. The half-side cylinder surface 7 includes two fan-shaped cylindrical third shock-absorbing brackets 9, the center height of the third shock-absorbing bracket 9 is set at the center position of the half-side cylinder surface 7, and the horizontal position of the third shock-absorbing bracket 9 is set at the position where the clockwise angle of the center angle of the half-side cylinder surface 7 is 45° and 135°; the sampling inner cylinder top cover 8 is provided with a fourth shock-absorbing bracket 11, and the fourth shock-absorbing bracket 11 is set at the center of the outer top surface of the sampling inner cylinder top cover 8.

[0053] In a preferred embodiment of the present invention, the height of the cylindrical cylinder after the two half-side cylinder surfaces 7 are spliced ​​together is 300mm, the inner diameter is 200mm, and the thickness is 4mm; the inner top surface diameter of the sampling inner cylinder top cover 8 is 208mm, the inner height is 50mm, and the thickness is 4mm; the height of the third shock-absorbing bracket 9 and the fourth shock-absorbing bracket 11 is 50mm, the outer diameter is 40mm, and the thickness is 5mm.

[0054] In a preferred embodiment of the present invention, the device for taking undisturbed soil samples that are easily disturbed is designed with a double-layer soil sampling device, in which the inner cylinder and the outer box are connected by a shock absorber and filled with temperature-sensitive hydrogel, thereby ensuring that the undisturbed soil samples are not disturbed during the sampling and transportation process, and ensuring that the initial structure of the undisturbed soil body is not destroyed, thereby obtaining physical and mechanical properties indoors; at the same time, the device for taking undisturbed soil samples that are easily disturbed can sample undisturbed soil that is easily disturbed, is simple to operate, and can be widely promoted and used.

[0055] like Fig.10 As shown, an embodiment of the present invention provides a method for taking an undisturbed soil sample that is easily disturbed, using the above-mentioned device for taking an undisturbed soil sample that is easily disturbed to take an undisturbed soil sample, and the method comprises the following steps:

[0056] S101: Apply vaseline on the inner surfaces of the two half-side cylinder surfaces 7 and the inner surfaces of the two sampling inner cylinder top covers 8, and take original soil samples.

[0057] This step specifically includes the following steps:

[0058] S1011: Determine the location where soil samples are to be taken. First, remove the surface soil with a shovel to expose the fresh section. Excavate to a depth of about 0.5m.

[0059] S1012: Using a shovel, trim the rough outline of the intended sample on the upper, left, right, front and back sides of the intended sampling position, and gently place the two half-side cylinder surfaces 7 that form a cylindrical shape on the top of the intended soil sample;

[0060] S1013: Gently place two half-side cylinder surfaces 7 that form a cylindrical shape on the top of the sample, use a thin-cut soil knife to cut a soil sample slightly larger than the half-side cylinder surface 7 along the periphery of the half-side cylinder surface 7, and press the half-side cylinder surface 7 vertically downward;

[0061] S1014: Repeat step S1013 until the soil sample extends out of the upper edge of the half-side cylinder surface 7, and then level the upper and lower parts of the soil sample of the half-side cylinder surface 7.

[0062] S103: The sampling inner cylinder top cover 8 is tightly buckled on the top and bottom of the two half-side cylinder surfaces 7, the screws are fixed and tightened, and vaseline is applied to the contact position;

[0063] S105: Align the fourth shock-absorbing bracket 11 at the bottom of the cylindrical sampling inner cylinder with the free end of the first shock-absorbing spring 5b at the bottom of the shock-absorbing outer box body 1, align the lower notch of the third shock-absorbing bracket 9 on the side of the cylindrical sampling inner cylinder with the free end of the first shock-absorbing spring 5b on the side of the shock-absorbing outer box body 1, and press down the cylindrical sampling inner cylinder so that the cylindrical sampling inner cylinder is supported by the first shock-absorbing spring 5b;

[0064] S107: Align the free end of the second shock absorbing spring 6b of the shock absorbing outer box upper cover 2 with the fourth shock absorbing bracket 11 at the top of the cylindrical sampling inner tube, and tightly buckle the shock absorbing outer box upper cover 2 on the top of the shock absorbing outer box body, fix and tighten the screws;

[0065] S109: Place the shock-absorbing outer box horizontally, introduce liquid thermosensitive hydrogel from the shock-absorbing solution inlet 3a until the thermosensitive hydrogel overflows from the shock-absorbing solution outlet 3b, and seal the shock-absorbing solution inlet 3a; insert a constant temperature heating rod from the shock-absorbing solution outlet 3b, control the temperature of the constant temperature heating rod to make the thermosensitive hydrogel form a condensed state, and seal the shock-absorbing solution outlet 3b.

[0066] S111: transport the device to the laboratory and store it at 30-35°C;

[0067] S113: When using the soil sample, take out the cylindrical sampling inner cylinder from the square shock-absorbing outer box, and remove the two sampling inner cylinder top covers 8 and the two half side cylinder surfaces 7.

[0068] When controlling the temperature of the thermostatic heating rod, the temperature of the heating rod is set to 35° C., so that the thermosensitive hydrogel forms a condensed state. The thermosensitive hydrogel is preferably Pluronic F127 thermosensitive hydrogel, and the heating power of the thermostatic heating rod is preferably 200W.

[0069] The device and method for taking undisturbed soil samples that are easily disturbed provided by the embodiments of the present invention can be used to sample undisturbed soil that is easily disturbed. The operation is simple, and the undisturbed soil samples are ensured not to be disturbed during the sampling and transportation process, and the method is easy to promote and use.

[0070] The present invention is described in detail below in conjunction with the preferred embodiments of the present invention.

[0071] In order to overcome the shortcomings of the prior art, the present invention provides a device and method for sampling undisturbed soil that is easily disturbed, thereby solving the problem of sampling undisturbed soil that is easily disturbed.

[0072] like Figure 1 , Figure 2 As shown, a preferred embodiment of the present invention provides a device for taking undisturbed soil samples that are easily disturbed, including a square shock-absorbing outer box and a cylindrical sampling inner tube, and the sampling inner tube is placed in the shock-absorbing outer box. The square shock-absorbing outer box includes a shock-absorbing outer box body 1 and a shock-absorbing outer box upper cover 2. The outer box body 1 is closed at the bottom and open at the top. The recommended dimensions of the inner bottom surface of the body 1 are 400×400mm2, the recommended dimensions of the inner height are 500mm, and the recommended dimensions of the thickness are 4mm. The upper cover 2 is closed at the top and open at the bottom. The recommended dimensions of the inner top surface of the upper cover 2 are 408×408mm2, the recommended dimensions of the inner height are 50mm, and the recommended dimensions of the thickness are 4mm. A shock-absorbing solution inlet 3a is set at the bottom of the side of the body 1, and the recommended diameter is 40mm. As shown Figure 3 , Figure 4 As shown, a cylindrical first shock-absorbing bracket 5a and a first shock-absorbing spring 5b are provided at the center of the inner bottom surface and the four side surfaces of the main body 1. One end of the first shock-absorbing spring 5b is fixed to the first shock-absorbing bracket 5a, and the other end is a free end. The recommended height of the cylindrical first shock-absorbing bracket 5a is 30 mm, the recommended outer diameter is 40 mm, and the recommended thickness is 4 mm. The upper cover 2 is tightly buckled on the main body 1, and a sealing rubber gasket is provided at the contact position between the two. The main body 1 and the upper cover 2 are tightly connected by bolts, and two bolts are evenly spaced on each side of the outer box, for a total of 8 bolts. At the positions corresponding to the bolts, the main body 1 and the upper cover 2 are respectively provided with a first bolt hole 4a and a second bolt hole 4b. A shock-absorbing solution outlet 3b is provided on the top of the upper cover 2, and the recommended diameter is 40 mm. As shown Figure 5 As shown, a cylindrical second shock absorbing bracket 6a and a second shock absorbing spring 6b are arranged at the center of the top of the upper cover 2. One end of the second shock absorbing spring 6b is fixed to the second shock absorbing bracket 6a, and the other end is a free end. The recommended height of the cylindrical second shock absorbing bracket 6a is 30 mm, the recommended outer diameter is 40 mm, and the recommended thickness is 5 mm.

[0073] like Figure 6 As shown, the cylindrical sampling inner tube includes two half-side tube surfaces 7 and two sampling inner tube top covers 8. Figure 7As shown, the two half-side cylinder surfaces 7 can be spliced ​​into a cylindrical cylinder with the bottom and top surfaces completely open. The recommended height of the cylindrical cylinder after splicing is 300mm, the recommended inner diameter is 200mm, and the recommended thickness is 4mm. The half-side cylinder surface 7 includes two fan-shaped cylindrical third shock-absorbing brackets 9 and 6 third bolt holes 10a. The center height of the third shock-absorbing bracket 9 is set at the center position of the half-side cylinder surface 7, and the horizontal position is set at the position where the clockwise angle of the center angle of the half-side cylinder surface 7 is 45° and 135°. The 6 third bolt holes 10a are arranged in 2 rows, 3 in each row, and the height from the top and bottom of the half-side cylinder surface 7 is 50mm. The horizontal position is set at the position where the clockwise angle of the center angle of the half-side cylinder surface 7 is 30°, 90° and 130°. The recommended fan angle of the third shock-absorbing bracket 9 is 300°, the recommended height is 50mm, the recommended outer diameter is 40mm, and the recommended thickness is 5mm. The inner cylinder top cover 8 is closed at the top and open at the bottom. As shown Figure 8 As shown, the inner cylinder top cover 8 includes 6 bolt holes 10b and a fourth shock-absorbing bracket 11. The recommended diameter of the inner top surface of the inner cylinder top cover 8 is 208mm, the recommended size of the inner height is 50mm, and the recommended size of the thickness is 4mm. The two inner cylinder top covers 8 are tightly buckled on the top and bottom of the two half-side cylinder surfaces 7, and sealing rubber gaskets are set at the contact positions. And the inner cylinder top cover 8 and the two half-side cylinder surfaces 7 are tightly connected by bolts. Fig. 9 As shown, the bottoms of the six bolt holes 10b are flush with the edge of the open end of the inner cylinder top cover 8, and the horizontal positions are evenly distributed at intervals of 60° at the central angle of the inner cylinder top cover. The fourth shock-absorbing bracket 11 is set at the center of the outer top surface of the inner cylinder top cover 8, with a recommended height of 50 mm, a recommended outer diameter of 40 mm, and a recommended thickness of 5 mm.

[0074] In addition, the present invention also provides a sampling method using the device for taking soil samples that are easily disturbed, comprising the following steps: Fig.10 As shown:

[0075] Step 1: Apply vaseline on the inner surfaces of the two half-side cylinder surfaces 7 and the inner surfaces of the two inner cylinder top covers 8. Determine the location where the soil sample is to be taken. First, use a shovel to remove the surface soil to expose the fresh section, and dig to a depth of about 0.5m. Use a shovel to cut out the approximate outline of the sample to be taken on the upper, left, right, front and back sides of the proposed sampling location. Gently place the two half-side cylinder surfaces 7 that form a cylindrical shape on the top of the sample. Use a thin-cut soil knife to cut the soil sample slightly larger than the half-side cylinder surface 7 along the periphery of the half-side cylinder surface 7. Then press the half-side cylinder surface 7 vertically downward, and repeat the previous step until the soil sample extends out of the upper edge of the half-cylinder surface. Finally, smooth the upper and lower parts of the half-cylinder surface.

[0076] Step 2: Put the inner cylinder cover 8 tightly on the top and bottom of the two half-side cylinder surfaces 7, place screws and nuts of corresponding sizes at the third bolt hole 10a and the bolt hole 10b, and fix the screws symmetrically. After all the screws are fixed, tighten them one by one. Apply vaseline at the contact position of the parts to prevent the moisture content of the soil sample from changing.

[0077] Step 3: Align the fourth shock-absorbing bracket 11 at the bottom of the cylindrical sampling inner cylinder with the free end of the first shock-absorbing spring 5b at the bottom of the shock-absorbing outer box body 1, and align the lower notch of the third shock-absorbing bracket 9 on the side of the sampling inner cylinder with the free end of the first shock-absorbing spring 5b on the side of the shock-absorbing outer box body 1. Press down the cylindrical sampling inner cylinder so that the sampling inner cylinder is supported by the first shock-absorbing spring 5b.

[0078] Step 4: Align the free end of the second shock-absorbing spring 6b on the top of the shock-absorbing outer box cover 2 with the fourth shock-absorbing bracket 11 on the top of the cylindrical sampling inner tube. Tightly buckle the outer box cover 2 on the top of the quasi-shock-absorbing outer box body 1, place screws and nuts of corresponding sizes at the first bolt hole 4a and the second bolt hole 4b, and fix the screws symmetrically. After all the screws are fixed, tighten them one by one.

[0079] Step 5: Place the shock-absorbing outer box horizontally, and introduce 10-15°C liquid thermosensitive hydrogel from the shock-absorbing solution inlet 3a at the bottom of the side of the main body 1 until it overflows from the shock-absorbing solution outlet 3b at the top of the upper cover 2, and seal the shock-absorbing solution inlet 3a. Put a constant temperature heating rod into the shock-absorbing solution outlet 3b, control the temperature of the heating rod to 35°C, so that the thermosensitive hydrogel forms a condensed state, and seal the shock-absorbing solution outlet 3b. The thermosensitive hydrogel is recommended to be Pluronic F127 thermosensitive hydrogel, and the constant temperature heating rod is recommended to be EHEIM German imported EHEIM heating rod (200W).

[0080] Step 6: Carefully transport the device of the present invention to the laboratory and store it at 30-35°C.

[0081] Step 7: When the soil sample is to be used, the device of the present invention is placed in an environment of 10-15°C to change the thermosensitive hydrogel from a condensed state to a liquid state, and the liquid thermosensitive hydrogel is collected in a storage tank for use next time the soil is collected.

[0082] Step 8: Loosen the screws and nuts of the first bolt hole 4a and the second bolt hole 4b of the shock-absorbing outer box, and slowly remove the cylindrical sampling inner tube. Loosen the screws and nuts of the third bolt hole 10a and the bolt hole 10b of the sampling inner tube, and remove the two inner tube top covers 8. Slowly remove the two half-side tube surfaces 7.

[0083] The preferred specific embodiments of the present invention are described in detail above. It should be understood that ordinary technicians in the field can make many modifications and changes based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by technicians in the technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A device for taking soil samples that are easily disturbed. It is characterized in that The device comprises a square shock-absorbing outer box and a cylindrical sampling inner cylinder, wherein the cylindrical sampling inner cylinder is placed inside the square shock-absorbing outer box, and the cylindrical sampling inner cylinder and the square shock-absorbing outer box are connected via a shock-absorbing device, wherein: The square shock-absorbing outer box completes the sealing of the original soil sample, and includes a shock-absorbing outer box body and a shock-absorbing outer box upper cover. The shock-absorbing outer box body is closed at the bottom and open at the top, and the shock-absorbing outer box upper cover is closed at the top and open at the bottom. The shock-absorbing outer box upper cover is tightly buckled on the shock-absorbing outer box body through a fastening device; The cylindrical sampling inner cylinder completes the sampling and sealing of the original soil sample, and includes two half-side cylinder surfaces and two sampling inner cylinder top covers. The two half-side cylinder surfaces can be spliced ​​into a cylindrical cylinder with the bottom and top surfaces completely open. The top of the sampling inner cylinder top cover is closed and the bottom is open; the two sampling inner cylinder top covers are tightly buckled on the top and bottom of the two half-side cylinder surfaces through a fastening device. The bottom of the side of the shock-absorbing outer box body is provided with a shock-absorbing solution inlet, and the top of the upper cover of the shock-absorbing outer box is provided with a shock-absorbing solution outlet; The shock-absorbing outer box is placed horizontally, and liquid thermosensitive hydrogel is introduced from the shock-absorbing solution inlet until the thermosensitive hydrogel overflows from the shock-absorbing solution outlet, and the shock-absorbing solution inlet is sealed; a constant temperature heating rod is inserted from the shock-absorbing solution outlet, and the temperature of the constant temperature heating rod is controlled to make the thermosensitive hydrogel form a condensed state, and the shock-absorbing solution outlet is sealed; When the soil sample is to be used, the device of the present invention is placed in an environment of 10-15°C to change the thermosensitive hydrogel from a condensed state to a liquid state, and the liquid thermosensitive hydrogel is collected in a storage tank and used again when the soil is collected next time.

2. The device for taking a soil sample that is easily disturbed as claimed in claim 1, It is characterized in that The shock-absorbing outer box upper cover and the shock-absorbing outer box main body are tightly connected by bolts, and a sealing rubber gasket is arranged at the contact position between the shock-absorbing outer box upper cover and the shock-absorbing outer box main body; the two sampling inner cylinder top covers and the two half-side cylinder surfaces are tightly connected by bolts, and a sealing rubber gasket is arranged at the contact position between the sampling inner cylinder top cover and the cylinder surface.

3. The device for taking a soil sample that is easily disturbed as claimed in claim 1, It is characterized in that A cylindrical first shock-absorbing bracket and a first shock-absorbing spring are arranged at the center of the inner bottom surface and four side surfaces of the shock-absorbing outer box body, one end of the first shock-absorbing spring is fixed to the first shock-absorbing bracket, and the other end of the first shock-absorbing spring is a free end; a cylindrical second shock-absorbing bracket and a second shock-absorbing spring are arranged at the center of the inner top of the shock-absorbing outer box upper cover, one end of the second shock-absorbing spring is fixed to the second shock-absorbing bracket, and the other end of the second shock-absorbing spring is a free end.

4. The device for taking a soil sample that is easily disturbed as claimed in claim 1, It is characterized in that The thermosensitive hydrogel is Pluronic F127 thermosensitive hydrogel.

5. The device for taking soil samples that are easily disturbed as claimed in claim 1, It is characterized in that The inner bottom surface of the shock-absorbing outer box body is 400×400mm2, the inner height is 500mm, and the thickness is 4mm; the inner top surface of the shock-absorbing outer box cover is 408×408mm2, the inner height is 50mm, and the thickness is 4mm; the first shock-absorbing bracket is 30mm high, 40mm in outer diameter, and 4mm in thickness; the second shock-absorbing bracket is 30mm high, 40mm in outer diameter, and 5mm in thickness.

6. The device for taking a soil sample that is easily disturbed as claimed in claim 1, It is characterized in that The half-side cylinder surface includes two fan-shaped cylindrical third shock-absorbing brackets, the center height of the third shock-absorbing brackets is set at the center position of the half-side cylinder surface, and the horizontal position of the third shock-absorbing brackets is set at 45° and 135° clockwise from the center angle of the half-side cylinder surface; the sampling inner cylinder top cover is provided with a fourth shock-absorbing bracket, and the fourth shock-absorbing bracket is set at the center of the outer top surface of the sampling inner cylinder top cover.

7. The device for taking a soil sample that is easily disturbed as claimed in claim 6, It is characterized in that The height of the cylindrical cylinder after the two half side cylinder surfaces are spliced ​​together is 300mm, the inner diameter is 200mm, and the thickness is 4mm; the inner top surface diameter of the sampling inner cylinder top cover is 208mm, the inner height is 50mm, and the thickness is 4mm; the height of the third shock-absorbing bracket and the fourth shock-absorbing bracket is 50mm, the outer diameter is 40mm, and the thickness is 5mm.

8. The device for taking a soil sample that is easily disturbed as claimed in claim 1, It is characterized in that The heating power of the constant temperature heating rod is 200W.

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