CN113295495A - Device and method for manufacturing frozen soil sample with high ice content - Google Patents
Device and method for manufacturing frozen soil sample with high ice content Download PDFInfo
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- CN113295495A CN113295495A CN202110578094.0A CN202110578094A CN113295495A CN 113295495 A CN113295495 A CN 113295495A CN 202110578094 A CN202110578094 A CN 202110578094A CN 113295495 A CN113295495 A CN 113295495A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
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- Devices That Are Associated With Refrigeration Equipment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a device and a method for manufacturing a frozen soil sample with high ice content, which comprises a refrigeration control system, a cold liquid inlet pipe, a cold liquid return pipe, a circular cooling pipe, a water pump, a water inlet pipe, a water return pipe, a permeable stone and a sample cylinder, the piston tray, the annular fixing device, the bent axle, the connecting rod, a support, a pedestal, the motor is constituteed, inlet tube and wet return link to each other with the water pump, the sample cell upside links to each other with the wet return, the sample cell downside links to each other with the inlet tube, the sample cell is installed on the piston tray, piston tray inside is equipped with the pipeline and supplies the inlet tube to pass, the position that the sample cell links to each other with inlet tube and wet return can set up the permeable stone, piston tray below links to each other with the connecting rod, annular fixing device sets up around the piston tray, annular fixing device below sets up support and base, the connecting rod passes through the bent axle and links to each other with the motor, the invention has characteristics such as simple structure, convenient operation.
Description
Technical Field
The invention relates to the field of frozen soil mechanics research, in particular to a device and a method for manufacturing a frozen soil sample with high ice content.
Background
The high ice content frozen soil is frozen soil with the volume ice content of more than 20 percent, and test results show that the high ice content characteristic of the high ice content frozen soil enables the strength and the deformation characteristic to be obviously different from those of the conventional frozen soil, so that the research conclusion of the conventional frozen soil cannot be used. In an indoor test, how to prepare a frozen soil sample with high ice content is a difficult test problem, and at present, the method for preparing the frozen soil sample with high ice content in a laboratory mainly comprises the following 3 methods:
the method comprises the following steps: maxiajie et al published an academic paper entitled "research on high temperature-high ice content frozen clay strength test" in journal of "geotechnical" of No. 9, volume 29, year 2008, and duhaimin et al published an academic paper entitled "influence of initial ice content on deformation and strength of frozen silty sandy soil" in journal of "geotechnical" of volume 10, volume 35, year 2014. The paper proposes that a method of mixing dry soil, liquid water and ice particles is adopted to prepare a frozen soil sample with high ice content, namely, a part of liquid water is mixed with dry soil to prepare a soil sample with a certain water content, and then the ice particles and the rest of liquid water are added to prepare the frozen soil sample with high ice content.
The method 2 comprises the following steps: an academic paper entitled "study on influence of strain rate and water content on uniaxial compression characteristics of frozen soil" is published by Du Haimen et al in 2016, volume 37, journal of the 5 th Engineer's mechanics of rock. It is pointed out that firstly, the mud with required water content is prepared, then it is placed in refrigerator, and is constant-temp. for at least 12h at 0.5 deg.C, then the mud is placed in the iron mould with cylindrical plastic lining which can be separated into two halves, and the whole mould is placed in the heat-insulating box, and is cooled by means of low-temp. alcohol circulating in the copper tube under the mould, and in the course of sample preparation, the unfrozen mud which has been poured into the mould is stirred at intervals so as to prevent the powder sandy soil from sinking and layering in the course of freezing, and can ensure uniformity of sample, so that the frozen soil sample with high ice content can be prepared.
The method 3 comprises the following steps: a preparation method of a frozen soil sample with high ice content is disclosed in Chinese patent granted book CN 107727467B, and comprises the steps of mixing water-soluble substances with dry soil, carrying out layered compaction to form a frozen soil sample, putting the frozen soil sample into a saturator, leading water flow into and out of the saturator to dissolve and remove the water-soluble substances in the frozen soil sample, forming a cavity in the frozen soil sample along with the dissolution of the water-soluble substances, leading the water flow into the cavity and filling the cavity, and finally putting the cavity in a freezer for freezing, thereby preparing the frozen soil sample with high ice content.
The 3 methods for preparing the frozen soil sample with high ice content respectively have the following defects:
(1) the process of freezing the high ice content frozen soil sample prepared by the method 1 is different from the process of freezing a large amount of water in the sample in the natural environment, and the formation process of the high ice content frozen soil in the natural environment cannot be reflected;
(2) the frozen soil sample with high ice content prepared by the method 2 is easy to generate the phenomenon of layering, so that the sample is not uniform;
(3) the preparation process of the method 3 is complicated, and the water-soluble substances are easy to mix with the soil particles and are not easy to be completely removed along with water flow in the subsequent dissolving process.
In view of the above, there is a need for an apparatus and a method for producing frozen soil samples with high ice content, so as to achieve the purpose of producing more homogeneous frozen soil samples with high ice content.
Disclosure of Invention
The invention aims to provide a device and a method for manufacturing a frozen soil sample with high ice content, and the device can be used for preparing a relatively homogeneous frozen soil sample with high ice content in a laboratory. The invention has the characteristics of simple structure, convenient operation and the like.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the device for manufacturing the frozen soil sample with high ice content comprises a refrigeration control system, a cold liquid inlet pipe, a cold liquid return pipe, a circumferential cooling pipe, a water pump, a water inlet pipe, a water return pipe, permeable stones, a sample cylinder, a piston tray, a circumferential fixing device, a crankshaft, a connecting rod, a support, a base and a motor. The cooling liquid inlet pipe, the cooling liquid return pipe, the annular cooling pipe and the refrigeration control system form a refrigeration loop, and the annular cooling pipe is arranged on the surface of the outer wall of the sample cylinder; the water inlet pipe, the water return pipe, the sample cylinder and the water pump form a water circulation loop, the water inlet pipe and the water return pipe are connected with the water pump, openings are formed in the upper side and the lower side of the sample cylinder, the upper side of the sample cylinder is connected with the water return pipe, and the lower side of the sample cylinder is connected with the water inlet pipe; the sample cylinder is arranged on the piston tray, and a pipeline is arranged in the piston tray and is used for the water inlet pipe to pass through; permeable stones can be arranged at the positions where the sample cylinder is connected with the water inlet pipe and the water return pipe; the lower part of the piston tray is connected with the connecting rod, and a circumferential fixing device is arranged around the piston tray; a bracket and a base are arranged below the annular fixing device; the connecting rod is connected with the motor through a crankshaft.
In the above device, the openings provided on the upper and lower sides of the sample tube and below the piston tray are both circular.
In the above device, the base is of an adjustable height type.
A method for making a frozen soil sample with high ice content, comprising the steps of:
the first step, connecting a cold liquid inlet pipe, a cold liquid return pipe and a circular cooling pipe with a refrigeration control system to form a refrigeration loop, and connecting a water inlet pipe, a water return pipe and a sample cylinder with a water pump to form a water circulation loop;
secondly, adding dry soil and water into a sample cylinder according to the calculated mass, and arranging a permeable stone at the position where the sample cylinder is connected with a water inlet pipe and a water return pipe;
thirdly, turning on a water pump to enable the interior of the sample cylinder to form stable water flow from bottom to top;
fourthly, starting the motor to enable the crankshaft and the connecting rod to start to work, wherein the connecting rod can drive the piston tray and the sample cylinder to move up and down together;
fifthly, opening a refrigeration control system to fill the annular cooling pipe with the refrigerant liquid, so that the frozen soil sample with high ice content in the sample cylinder is gradually frozen;
and sixthly, after the frozen soil sample with high ice content in the sample cylinder is frozen, quickly taking out the frozen soil sample, and placing the frozen soil sample in a low-temperature box with required negative temperature to prepare the frozen soil sample with high ice content.
Compared with the prior art, the invention has the beneficial effects that:
by arranging the water circulation loop, stable water flow from bottom to top can be formed in the sample cylinder to resist the self weight of the soil particles, so that the soil particles are in a motion state in the sample cylinder; the piston tray and the sample cylinder are driven by the connecting rod to move up and down together, so that soil particles in the sample cylinder are in a disordered movement state; make the inside water of sample cylinder freeze through the hoop cooling tube, because the soil granule is in unordered motion state, can avoid the soil granule to sink at the freezing in-process and arouse the sample layering, it is more even also to make the distribution of the inside soil granule of the frozen soil sample of high ice content who makes, after freezing the completion, realizes the purpose of stereotyping fast, finally put into the low-temperature chamber of required negative temperature through the frozen soil sample of high ice content after will stereotyping, realize making the purpose of comparatively homogeneous high ice content frozen soil sample.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for producing a frozen soil sample with a high ice content according to the present invention.
FIG. 2 is a detailed structure diagram of the device for making the frozen soil sample with the layered cold growing structure.
FIG. 3 is a side view of the apparatus for producing a frozen soil sample having a layered cold-growing structure according to the present invention.
FIG. 4 is a water circulation circuit diagram of the apparatus for producing a frozen soil sample of a layered cold-rolled structure according to the present invention.
Fig. 5 is a refrigeration circuit diagram of the apparatus for producing a frozen soil sample of a layered cold-growing structure according to the present invention.
The reference numbers in the figures illustrate: 1-refrigeration control system, 2-cold liquid inlet pipe, 3-cold liquid return pipe, 4-circular cooling pipe, 5-water pump, 6-water inlet pipe, 7-water return pipe, 8-permeable stone, 9-sample cylinder, 10-piston tray, 11-circular fixing device, 12-crankshaft, 13-connecting rod, 14-bracket, 15-base and 16-motor.
Detailed Description
The invention will be described in further detail with reference to the following drawings and specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
fig. 1 shows a device for manufacturing a frozen soil sample with high ice content, which comprises a refrigeration control system 1, a cold liquid inlet pipe 2, a cold liquid return pipe 3, a circumferential cooling pipe 4, a water pump 5, a water inlet pipe 6, a water return pipe 7, a permeable stone 8, a sample cylinder 9, a piston tray 10, a circumferential fixing device 11, a crankshaft 12, a connecting rod 13, a bracket 14, a base 15 and a motor 16. The cold liquid inlet pipe 2, the cold liquid return pipe 3, the annular cooling pipe 4 and the refrigeration control system 1 form a refrigeration loop, and the annular cooling pipe 4 is arranged on the surface of the outer wall of the sample cylinder 9; the water inlet pipe 6, the water return pipe 7, the sample cylinder 9 and the water pump 5 form a water circulation loop, the water inlet pipe 6 and the water return pipe 7 are connected with the water pump 5, openings are formed in the upper side and the lower side of the sample cylinder 9, the upper side of the sample cylinder 9 is connected with the water return pipe 7, and the lower side of the sample cylinder 9 is connected with the water inlet pipe 6; the sample cylinder 9 is arranged on a piston tray 10, and a pipeline is arranged in the piston tray 10 and is used for the water inlet pipe 6 to pass through; a permeable stone 8 can be arranged at the position where the sample cylinder 9 is connected with the water inlet pipe 6 and the water return pipe 7; the lower part of the piston tray 10 is connected with a connecting rod 13, and a circumferential fixing device 11 is arranged around the piston tray 10; a bracket 14 and a base 15 are arranged below the annular fixing device 11; the connecting rod 13 is connected to a motor 16 via a crankshaft 12.
A method for making a frozen soil sample with high ice content, comprising the steps of:
firstly, connecting a cold liquid inlet pipe 2, a cold liquid return pipe 3 and a circumferential cooling pipe 4 with a refrigeration control system 1 to form a refrigeration loop, and connecting a water inlet pipe 6, a water return pipe 7, a sample cylinder 9 with a water pump 5 to form a water circulation loop;
secondly, adding dry soil and water into a sample cylinder 9 according to the calculated mass, and arranging a permeable stone 8 at the position where the sample cylinder 9 is connected with a water inlet pipe 6 and a water return pipe 7;
thirdly, turning on the water pump 5 to form stable water flow from bottom to top in the sample cylinder 9;
fourthly, starting the motor 16 to enable the crankshaft 12 and the connecting rod 13 to start working, wherein the connecting rod 13 can drive the piston tray 10 and the sample cylinder 9 to move up and down together;
fifthly, opening the refrigeration control system 1 to fill the annular cooling pipe 4 with the refrigerant liquid, so that the frozen soil sample with high ice content in the sample cylinder 9 is gradually frozen;
and sixthly, after the frozen soil sample with high ice content in the sample cylinder 9 is frozen, quickly taking out the frozen soil sample, and placing the frozen soil sample in a low-temperature box with required negative temperature to prepare the frozen soil sample with high ice content.
Claims (2)
1. A method for making a frozen soil sample with high ice content, comprising the steps of:
firstly, connecting a cold liquid inlet pipe (2), a cold liquid return pipe (3) and a circumferential cooling pipe (4) with a refrigeration control system (1) to form a refrigeration loop, and connecting a water inlet pipe (6), a water return pipe (7) and a sample cylinder (9) with a water pump (5) to form a water circulation loop;
secondly, adding dry soil and water into a sample cylinder (9) according to the calculated mass, and arranging a permeable stone (8) at the position where the sample cylinder (9) is connected with a water inlet pipe (6) and a water return pipe (7);
thirdly, turning on a water pump (5) to form stable water flow from bottom to top in the sample cylinder (9);
fourthly, starting the motor (16) to enable the crankshaft (12) and the connecting rod (13) to start to work, wherein the connecting rod (13) can drive the piston tray (10) and the sample cylinder (9) to move up and down together;
fifthly, opening the refrigeration control system (1) to fill the annular cooling pipe (4) with the refrigerant liquid, so that the frozen soil sample with high ice content in the sample cylinder (9) is gradually frozen;
and sixthly, after the frozen soil sample with high ice content in the sample cylinder (9) is frozen, quickly taking out the frozen soil sample, and placing the frozen soil sample in a low-temperature box with required negative temperature to prepare the frozen soil sample with high ice content.
2. The device for realizing the method for manufacturing the frozen soil sample with high ice content in the claim 1 is composed of a refrigeration control system (1), a cold liquid inlet pipe (2), a cold liquid return pipe (3), a circumferential cooling pipe (4), a water pump (5), a water inlet pipe (6), a water return pipe (7), a permeable stone (8), a sample cylinder (9), a piston tray (10), a circumferential fixing device (11), a crankshaft (12), a connecting rod (13), a bracket (14), a base (15) and a motor (16), wherein the cold liquid inlet pipe (2), the cold liquid return pipe (3), the circumferential cooling pipe (4) and the refrigeration control system (1) form a refrigeration loop, and the circumferential cooling pipe (4) is arranged on the outer wall surface of the sample cylinder (9); the water inlet pipe (6), the water return pipe (7), the sample cylinder (9) and the water pump (5) form a water circulation loop, the water inlet pipe (6) and the water return pipe (7) are connected with the water pump (5), openings are formed in the upper side and the lower side of the sample cylinder (9), the upper side of the sample cylinder (9) is connected with the water return pipe (7), and the lower side of the sample cylinder (9) is connected with the water inlet pipe (6); the sample cylinder (9) is arranged on a piston tray (10), and a pipeline is arranged in the piston tray (10) and is used for a water inlet pipe (6) to penetrate through; a permeable stone (8) can be arranged at the position where the sample cylinder (9) is connected with the water inlet pipe (6) and the water return pipe (7); the lower part of the piston tray (10) is connected with a connecting rod (13), and a circumferential fixing device (11) is arranged around the piston tray (10); a bracket (14) and a base (15) are arranged below the annular fixing device (11); the connecting rod (13) is connected with the motor (16) through the crankshaft (12).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110578094.0A CN113295495A (en) | 2021-05-26 | 2021-05-26 | Device and method for manufacturing frozen soil sample with high ice content |
| ZA2021/05954A ZA202105954B (en) | 2021-05-26 | 2021-08-19 | Device and method for preparing high-ice content frozen soil sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110578094.0A CN113295495A (en) | 2021-05-26 | 2021-05-26 | Device and method for manufacturing frozen soil sample with high ice content |
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| Publication Number | Publication Date |
|---|---|
| CN113295495A true CN113295495A (en) | 2021-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110578094.0A Withdrawn CN113295495A (en) | 2021-05-26 | 2021-05-26 | Device and method for manufacturing frozen soil sample with high ice content |
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| CN (1) | CN113295495A (en) |
| ZA (1) | ZA202105954B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114624088A (en) * | 2022-03-14 | 2022-06-14 | 安徽理工大学 | Device for manufacturing frozen soil sample with high ice content and using method thereof |
| CN114910323A (en) * | 2022-05-07 | 2022-08-16 | 安徽理工大学 | Device for manufacturing frozen soil sample with high ice content and using method |
| WO2023087644A1 (en) * | 2021-11-19 | 2023-05-25 | 安徽理工大学 | Sample preparation device for high-ice-content frozen soil blasting model |
| GB2616926A (en) * | 2021-11-19 | 2023-09-27 | Univ Anhui Sci & Technology | Sample preparation device for high-ice-content frozen soil blasting model |
-
2021
- 2021-05-26 CN CN202110578094.0A patent/CN113295495A/en not_active Withdrawn
- 2021-08-19 ZA ZA2021/05954A patent/ZA202105954B/en unknown
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023087644A1 (en) * | 2021-11-19 | 2023-05-25 | 安徽理工大学 | Sample preparation device for high-ice-content frozen soil blasting model |
| GB2616926A (en) * | 2021-11-19 | 2023-09-27 | Univ Anhui Sci & Technology | Sample preparation device for high-ice-content frozen soil blasting model |
| CN114624088A (en) * | 2022-03-14 | 2022-06-14 | 安徽理工大学 | Device for manufacturing frozen soil sample with high ice content and using method thereof |
| CN114624088B (en) * | 2022-03-14 | 2024-05-07 | 安徽理工大学 | Device for manufacturing frozen soil sample with high ice content and application method thereof |
| CN114910323A (en) * | 2022-05-07 | 2022-08-16 | 安徽理工大学 | Device for manufacturing frozen soil sample with high ice content and using method |
| CN114910323B (en) * | 2022-05-07 | 2024-04-09 | 安徽理工大学 | Device for manufacturing frozen soil sample with high ice content and use method |
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| Publication number | Publication date |
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| ZA202105954B (en) | 2021-09-29 |
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