CN111442958A - Temperature control consolidation device for measuring soil body strain under boundary condition - Google Patents
Temperature control consolidation device for measuring soil body strain under boundary condition Download PDFInfo
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- CN111442958A CN111442958A CN202010275253.5A CN202010275253A CN111442958A CN 111442958 A CN111442958 A CN 111442958A CN 202010275253 A CN202010275253 A CN 202010275253A CN 111442958 A CN111442958 A CN 111442958A
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- consolidation
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- soil body
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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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0224—Thermal cycling
Abstract
The invention discloses a temperature control consolidation device for measuring soil body strain under boundary conditions, which comprises a consolidation chamber, wherein the consolidation chamber is arranged in a water tank and is connected with a temperature control system, the temperature control system is used for providing circulating heat load, the top of the consolidation chamber is connected with a positioning rod of an inverted T-shaped structure, and the positioning rod is used for determining the axial strain of a soil sample. The invention can simply and efficiently monitor the influence of the temperature on the soil body strain under the boundary condition.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering, and particularly relates to a temperature control consolidation device for measuring soil body strain under boundary conditions.
Background
Mechanical properties such as deformation characteristics of soil bodies are important parameters in geotechnical engineering, and have guiding significance for actual engineering. The evolution law of consolidation settlement of the soil body is an important basis for evaluating engineering safety, and the settlement phenomenon caused by mechanical loading and self-weight is the most important at present. However, in recent years, global climate change is abnormal, and the temperature thereof becomes an important influence factor, and the key problems to be solved are all urgent, such as irreversible deformation of soil body caused by alternate change of day and night temperature. On the other hand, surface cracking caused by evaporation, development of geothermal resources and the like are closely related to temperature, and soil bodies have different mechanical properties due to different temperature changes, so that the influence of temperature needs to be researched when analyzing the problems.
The idea of studying the deformation characteristics of rock and soil under the condition of temperature cycle change is generally as follows: placing an undisturbed soil sample obtained on site in a high-pressure consolidation device, setting a required temperature state, and applying pressure at the temperature to perform a consolidation test; on the other hand, under a certain consolidation pressure, temperature cycle change is carried out, and the displacement change condition of the soil sample in the whole process is monitored in real time. How to realize the temperature cycle change in the consolidation test is a key problem for researching the soil body temperature effect at present.
The consolidation device is a commonly used geotechnical test device, is used for measuring the expansion and compression performance of soil under different loads and limited conditions, can perform normal slow consolidation test and rapid consolidation test, and measures consolidation pressure and consolidation coefficient at the early stage. At present, the testing precision and controllability of the conventional consolidation test are widely accepted in the field of rock-soil mechanics at home and abroad, the consolidation test of the soil body is usually carried out under the condition of constant temperature, and the conventional tests are obviously insufficient along with the deep research and the requirements of the actual problems at present. It is necessary to design a consolidation test device with temperature variation for studying compressibility and expansion and contraction of soil under different boundary conditions, so that the consolidation test device can monitor the displacement variation of a soil sample during temperature cycle variation.
In most of the previous experiments, soil samples were laterally confined using a temperature controlled consolidation device ring made of ordinary steel. However, the linear thermal expansion coefficient of ordinary steel is comparable to that of soil skeletons, and ordinary steel rings undergo expansion and contraction during heating and cooling, imparting non-negligible lateral strain to the soil specimen. However, invar steel has the greatest characteristic of extremely small deformation along with temperature, and is suitable for manufacturing parts with strict requirements on temperature deformation.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a temperature-controlled consolidation device for measuring soil body strain under boundary conditions, which monitors the axial strain change of a soil sample in the device during temperature cycle change, aiming at the defects in the prior art.
The invention adopts the following technical scheme:
the utility model provides a measure soil body and meet an emergency and use control by temperature change consolidation device under boundary condition, includes consolidation device and temperature control system, and the consolidation device is including consolidating the room, and consolidation room sets up in the water tank to link to each other with temperature control system, temperature control system are used for providing circulation heat load, and the top of consolidation room is connected with the locating lever of the structure of falling T, and the locating lever is used for confirming the axial strain of soil sample.
Specifically, the consolidation chamber includes circular base, first permeable stone, annular hollow structure's sample chamber, stainless steel ring and annular apron from bottom to top in proper order, and first permeable stone sets up in the centre of circular base, and the sample chamber sets up on first permeable stone for place the soil sample, the border and the central point of soil sample put and are provided with the thermocouple respectively, and the stainless steel ring is connected with the sample chamber, and the annular apron passes through the bolt and is connected with circular base.
Further, a circular straight wall groove is formed in the upper surface of the circular base and used for installing the consolidation chamber; two annular grooves are formed in the bottom surface of the circular straight-wall groove by taking the central point as the center of a circle, are used for connecting a threaded pipe and are connected with a temperature control system through the threaded pipe.
Furthermore, the upper surface of the first permeable stone is flush with the bottom surface of the annular groove; the lower end of the sample chamber is embedded in a circular straight wall groove formed in the upper surface of the circular base.
Furthermore, temperature regulating device includes the water bath container, is provided with temperature controller and circulating pump in the water bath container, and the circulating pump passes through the pipeline to be connected with the business turn over entry end of the valve for water that circular base both sides set up, and the exit end of valve forms the liquid circulation return circuit with the screwed pipe connection that the first permeable stone lower part left and right sides set up.
Furthermore, invar steel rings are arranged at the lower part of the inner side of the stainless steel ring.
Specifically, the lower extreme of locating lever is provided with the second permeable stone, and the interlude of locating lever is connected with the displacement sensor.
Specifically, a foam board is arranged outside the water tank.
Compared with the prior art, the invention has at least the following beneficial effects:
the temperature control consolidation device for measuring the soil body strain under the boundary condition can simulate a saturated soil mechanics test under the complex temperature and stress boundary condition and research the heat-water-force coupling characteristic of the soil body; the design development and production manufacturing period is short, the related device is simple in structure, easy and convenient to operate, convenient and fast to install and test, low in cost and high in practicability.
Furthermore, the temperature control consolidation device for measuring the soil body strain under the boundary condition is characterized in that when the temperature in a consolidation chamber is changed due to the water temperature in a water tank, the volume of a soil sample expands with heat and contracts with cold until the deformation tends to be stable, and the deformation in the process is directly reflected in the movement of the vertical displacement rod, so that the mutual conversion process of pore water pressure in soil and effective stress converted into soil particles is indirectly reflected, and the mathematical relationship between the boundary temperature and the soil sample stress strain is conveniently researched.
Furthermore, a circular straight-wall groove is formed in the base in the consolidation chamber, so that the O-shaped threaded pipe is convenient to mount and protect.
Furthermore, a water bath temperature control mode is adopted, so that the temperature control in the consolidation chamber is realized, and the temperature boundary conditions of the sample under different working conditions are simulated.
Furthermore, the consolidation chamber is made of rigid stainless steel, and invar steel is used as a stainless steel ring material to limit the horizontal deformation of the soil sample.
In conclusion, the invention can simply and efficiently monitor the influence of the temperature on the strain of the soil body under the boundary condition.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic view of the overall structure of a temperature-controlled consolidation apparatus;
FIG. 2 is a schematic view of the consolidation apparatus;
FIG. 3 is a schematic structural view of a consolidation apparatus;
FIG. 4 is a schematic structural view of the inner wall of the consolidation chamber;
FIG. 5 is a detail view of the bottom structure of the consolidation chamber;
FIG. 6 is a schematic illustration of a consolidation chamber component material;
FIG. 7 is a schematic view of a consolidation chamber base structure;
FIG. 8 is a cross-sectional view of the consolidation apparatus 1-1;
FIG. 9 is a cross-sectional view of the consolidation apparatus 2-2, 3-3;
FIG. 10 is a graph showing the axial strain results of clay, wherein (a) is a stainless steel ring made of ordinary steel, and (b) is a stainless steel ring made of invar steel;
FIG. 11 is a graph showing the results of axial strain on sand, wherein (a) is a stainless steel ring made of plain steel and (b) is a stainless steel ring made of invar steel;
FIG. 12 is a graph showing the measurement of the cold-hot deformation of the temperature-controlled consolidation apparatus in the absence of a soil sample.
Wherein: 1. a valve; 2. a foam board; 3. a bolt; 4. a consolidation chamber; 5. a thermocouple; 6. positioning a rod; 7. a first permeable stone; a second permeable stone; 8. a stainless steel ring; 9. a displacement sensor; 10. a water line; 11. a water tank; 12. a threaded pipe; 13. a temperature controller; 14. a circulation pump; 15. a water bath container; 16. invar steel rings; 17. an annular groove.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases by those of ordinary skill in the art.
The invention provides a temperature control consolidation device for measuring soil body strain under boundary conditions, which is used for manufacturing geotechnical engineering measuring devices. The invention is improved on the basis of the traditional odometer, and the invar steel consolidation device ring is used for limiting the volume change of the soil body, thereby being convenient for observing the one-dimensional deformation of the soil body. The device consists of a consolidation chamber, permeable stones, an invar ring, a thermocouple, a displacement sensor, a positioning rod, a water tank, a foam board, a spiral pipe, a temperature controller, a circulating pump, a water bath and the like. The method can be used for researching and quantifying the influence of boundary conditions (namely thermal expansion and contraction) of the consolidation device ring on the thermal strain of the soil, and obtaining the influence rule of the temperature on the mechanical property of the saturated soil body; the circulating cold and heat test can be carried out on different soil samples, and the strain change rule of the soil body is obtained through the displacement sensor. The invention has complete functions, simple structure, convenient operation and high test precision.
Referring to fig. 1, the temperature-controlled consolidation device for measuring soil body strain under boundary conditions of the present invention includes a consolidation device and a temperature control system, the consolidation device is used for fixing a soil sample and maintaining a constant temperature, and the temperature control system is used for providing a cyclic thermal load and determining axial strains of different soil samples.
The diameter of the consolidation device is 320mm +/-10 mm, and the height is 270mm +/-10 mm; comprises a consolidation chamber 4, a water tank 11 and a positioning rod 6.
The core part of the consolidation device is a consolidation chamber 4, the consolidation chamber 4 is arranged in the water tank 11 and connected with a temperature control system, and the top of the consolidation chamber 4 is connected with a positioning rod 6 of an inverted T-shaped structure.
The consolidation chamber 4 sequentially comprises a circular base, a first permeable stone 7, a sample chamber with an annular hollow structure, an invar ring 16, a stainless steel ring 8 and an annular cover plate from bottom to top, wherein valves 1 for water inlet and outlet are respectively arranged on two sides of the circular base, the valves 1 are connected with a temperature control device, and a circular straight wall groove is formed in the upper surface of the base, so that the consolidation chamber can be automatically embedded, centered and stabilized; two annular grooves 17 are formed in the upper surface of the base by taking the center point of the circular straight-wall groove as the center of a circle and used for installing two O-shaped threaded pipes 12, a first permeable stone 7 is arranged in the middle of the base, the upper surface of the first permeable stone 7 is flush with the bottom surfaces of the annular grooves 17, and a soil sample is arranged on the upper surface of the first permeable stone 7; thermocouples 5 are respectively arranged at the boundary and the central position of the soil sample; the sample chamber is arranged on the base, and the lower end of the sample chamber is embedded into a circular straight-wall groove formed in the upper surface of the base; the stainless steel ring 8 is fixed in the sample chamber through four small bolts, so that the invar ring 16 can be fixed conveniently, and the lower end of the invar ring 16 is in close contact with the permeable stone 7 at the bottom of the sample chamber; the annular cover plate is arranged on the sample chamber, the base of the annular cover plate is fixed with the sample chamber 4 through a bolt 3, the lower end of the wing part of the positioning rod 6 is correspondingly provided with a second permeable stone 7', and the belly of the positioning rod 6 is connected with a displacement sensor 9.
Referring to FIG. 2, the height of the water tank 11 is 170mm + -5 mm, the outer diameter is 320mm + -10 mm, and the wall thickness is 10mm + -1.0 mm.
Preferably, in order to reduce energy loss and reduce soil temperature fluctuation, the periphery of the consolidation device is wrapped by the foam boards 2 to realize heat insulation.
Referring to fig. 1, the temperature control device includes two threaded pipes 12, a temperature controller 13, a circulation pump 14 and a water bath container 15, the threaded pipes 12 are correspondingly disposed on the left and right sides of the lower portion of the first porous stone 7, one end of each threaded pipe is connected with the circulation pump 14 through the valves 1 on the two sides of the base of the consolidation chamber 4 to form a closed liquid circulation loop, the circulation pump 14 is disposed on the top of the water bath container 15, and the temperature controller 13 is disposed in the water bath container 15.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 3 to 9, the base of the consolidation chamber is made of stainless steel with good wear resistance and high rigidity, and the upper surface of the base is provided with a circular straight-wall groove with a depth of 1mm +/-0.1 mm, so that the consolidation chamber can be automatically embedded, centered and stabilized.
Referring to fig. 2, two annular grooves are formed on the bottom surface of the circular groove with the center point as the center for installing two threaded pipes 12 with outer diameters of 3.5mm ± 0.1mm, and the vertical distance from the center of the threaded pipe 12 to the top end of the base is 3mm ± 0.5 mm.
Referring to fig. 3 and 4, a first permeable stone 7 with a diameter of 70mm + -5 mm and a height of 6mm + -1.0 mm is embedded in the groove at the center of the base, and a cylindrical soil sample with a height of 20mm + -5 mm and a diameter of 70mm + -5 mm is placed on the first permeable stone 7.
The periphery of the soil sample is surrounded by the stainless steel ring 8, the outer diameter of the stainless steel ring 8 is 70mm +/-5 mm, the height is 25mm +/-5 mm, the thickness is 19.5mm +/-0.1 mm, the lower portion of the inner side of the stainless steel ring 8 is surrounded by the invar steel ring 16, the cross section is approximately trapezoidal, the width of the maximum contraction opening is 2mm +/-0.1 mm, and the periphery of the soil sample is tightly surrounded by the invar steel ring 16.
Referring to fig. 5, four bolts 3 vertically pass through the stainless steel ring 8 and fix it at a distance of 6.4mm ± 0.1mm from the base.
Referring to fig. 6 and 7, the left side and the right side of the lower portion of the first permeable stone 7 are respectively connected with a threaded pipe 12 with an outer diameter of 3mm, the vertical distance from the lower end of the threaded pipe 12 to the bottom of the base is 43mm +/-5 mm, valves at two ends of the base are all made of 1/8BSP threads with the diameter of 3mm +/-0.1 mm, the cross-sectional views are shown in fig. 8 and 9, the vertical distance from the threaded pipe to the bottom of the base is 43mm (the specific position is close to the center of the vertical cross section of the base), and accidental breakage in the test process is avoided.
The working principle of the invention is as follows:
during the test, the water temperature in the water bath container 15 was controlled by the temperature control device 13; water having an initial temperature is circulated through the threaded pipes 12 around the top and bottom of the soil sample so that the soil sample is heated or cooled by heat exchange with the circulating water.
In order to ensure that the soil sample only has vertical deformation but not horizontal deformation, the periphery of the soil sample is tightly bound by the invar rings 16.
In order to reduce energy loss and reduce soil temperature fluctuation, foam boards 2 are adopted around the consolidation device for heat insulation, so that the soil temperature fluctuation in the consolidation device is less than 0.1 ℃ in a heat balance state.
When the soil sample is heated (cooled) and the volume is vertically expanded (contracted), the positioning rod 6 is disturbed so as to vertically move up and down, and the positioning rod is matched with the displacement sensor 9 to reflect the deformation of the soil sample, so that the axial strain of the soil sample is obtained.
The accuracy of the displacement sensor 9 measurement was about 0.025% (linearity error 0.25%) × stroke length (2.5mm) × sample height (25 mm).
In particular, the invention selects invar rings, while the traditional stainless steel rings are made of ordinary steel, since the coefficients of linear thermal expansion of ordinary steel and invar steel are respectively 1.5 × 10-5And 5.0 × 10-7The coefficient of thermal expansion of the common steel and the soil framework is close to 5 × 10 at the temperature of m/m DEG C-6～3.5×10-5The temperature is m/m ℃, and the coefficient of thermal expansion of the invar steel is 30 times that of the soil framework, so that the expansion and contraction of the invar steel can be ignored, the influence of boundary conditions on the axial strain of a soil test piece is effectively considered, and the volume deformation of the soil in the horizontal direction is effectively limited.
The present invention can be used in, but is not limited to, the following experimental studies:
(1) the cyclic thermal deformation characteristics of saturated clay and sandy soil under the cyclic heating and cooling conditions;
(2) axial strain of normally consolidated clay and loose sand under cyclic heating and cooling conditions, and the relationship between settling rate and temperature, as shown in fig. 10 and 11;
(3) respectively using consolidation device rings made of common steel and invar steel to perform tests along the same thermal path, comparing the strain of the actually measured soil body, and revealing the influence of boundary conditions on the axial strain of the saturated clay;
(4) the axial strain of different soil samples under cyclic thermal load was studied using the apparatus, as shown in fig. 12.
For example, in the experimental study of clay, the operation method of the invention is as follows:
after the soil sample is prepared, degassed water is added to the consolidation apparatus and the soil sample is allowed to soak for 24 hours. In order to achieve higher saturation, a vacuum of-80 kPa is maintained in a temperature-controlled consolidation device to remove gas in soil, and meanwhile, a displacement sensor and a positioning rod are used for measuring one-dimensional deformation of a soil sample in a saturation stage. After the vertical deformation of the soil sample is basically stable for 24 hours, compressing the sample to an effective vertical stress of 50 kilopascals; if the incremental axial strain is less than 0.025% within 24 hours, the consolidation process is complete. After the soil sample is solidified, each test piece bears the cyclic thermal load under the constant effective vertical stress. During the heating phase (cooling phase) to a stable temperature, the two thermocouples installed at the boundary and center of the soil sample showed almost the same temperature measurement (difference less than 0.1 ℃).
In conclusion, the stainless steel ring of the temperature control consolidation device is made of invar steel, so that the characteristics of small expansion coefficient, low strength and hardness, low thermal conductivity, high plasticity and toughness and the like are fully exerted, and the stainless steel ring can be widely used for researching the volume change of soil under the action of high temperature.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the claims of the present invention.
Claims (8)
1. The utility model provides a measure soil body and meet an emergency and use control by temperature change consolidation device under boundary condition, its characterized in that, including consolidation device and temperature control system, the consolidation device includes consolidation chamber (4), consolidation chamber (4) set up in water tank (11) to link to each other with temperature control system, temperature control system is used for providing circulation heat load, and the top of consolidation chamber (4) is connected with locating lever (6) of the structure of falling T, and locating lever (6) are used for confirming the axial strain of soil sample.
2. The temperature-controlled consolidation device for measuring soil body strain under boundary conditions is characterized in that the consolidation chamber (4) sequentially comprises a circular base, a first permeable stone (7), a sample chamber with an annular hollow structure, a stainless steel ring (8) and an annular cover plate from bottom to top, the first permeable stone (7) is arranged in the middle of the circular base, the sample chamber is arranged on the first permeable stone (7) and used for placing a soil sample, thermocouples (5) are respectively arranged at the boundary and the central position of the soil sample, the stainless steel ring (8) is connected with the sample chamber, and the annular cover plate is connected with the circular base through bolts (3).
3. The temperature-controlled consolidation device for measuring soil body strain under boundary conditions according to claim 2, wherein the upper surface of the circular base is provided with a circular straight wall groove for installing the consolidation chamber (4); two annular grooves (17) are arranged on the bottom surface of the circular straight-wall groove by taking the central point as the center of a circle, are used for connecting a threaded pipe (12) and are connected with a temperature control system through the threaded pipe (12).
4. The temperature-controlled consolidation apparatus for measuring soil body strain under boundary conditions as claimed in claim 3, wherein the upper surface of the first permeable stone (7) is disposed flush with the bottom surface of the annular groove (17); the lower end of the sample chamber is embedded in a circular straight wall groove formed in the upper surface of the circular base.
5. The temperature-controlled consolidation device for measuring soil body strain under boundary conditions according to claim 2, wherein the temperature control device comprises a water bath container (15), a temperature controller (13) and a circulating pump (14) are arranged in the water bath container (15), the circulating pump (14) is connected with inlet ends of water inlet and outlet valves (1) arranged on two sides of the circular base through pipelines, and outlet ends of the valves (1) are connected with threaded pipes (12) arranged on the left side and the right side of the lower portion of the first permeable stone (7) to form a liquid circulation loop.
6. The temperature-controlled consolidation device for measuring soil body strain under boundary conditions according to claim 2, wherein invar rings (16) are arranged at the lower part of the inner side of the stainless steel ring (8).
7. The temperature-controlled consolidation device for measuring soil body strain under boundary conditions according to claim 1 or 2, wherein the lower end of the positioning rod (6) is provided with a second permeable stone (7'), and the middle section of the positioning rod (6) is connected with a displacement sensor (9).
8. The temperature-controlled consolidation apparatus for measuring soil body strain under boundary conditions according to claim 1, wherein a foam board (2) is provided outside the water tank (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010275253.5A CN111442958A (en) | 2020-04-09 | 2020-04-09 | Temperature control consolidation device for measuring soil body strain under boundary condition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010275253.5A CN111442958A (en) | 2020-04-09 | 2020-04-09 | Temperature control consolidation device for measuring soil body strain under boundary condition |
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| CN111442958A true CN111442958A (en) | 2020-07-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112683745A (en) * | 2020-11-18 | 2021-04-20 | 江苏科技大学 | Heat-force-electroosmosis multi-field coupling soft soil consolidation test box |
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| CN102495199A (en) * | 2011-12-09 | 2012-06-13 | 南京大学 | Temperature and suction control high-pressure consolidometer |
| CN108717014A (en) * | 2018-05-30 | 2018-10-30 | 浙江大学宁波理工学院 | Water recycles temperature control one-dimensional consolidation instrument |
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2020
- 2020-04-09 CN CN202010275253.5A patent/CN111442958A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495199A (en) * | 2011-12-09 | 2012-06-13 | 南京大学 | Temperature and suction control high-pressure consolidometer |
| CN108717014A (en) * | 2018-05-30 | 2018-10-30 | 浙江大学宁波理工学院 | Water recycles temperature control one-dimensional consolidation instrument |
Non-Patent Citations (1)
| Title |
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| 张明之 等: "《铸造词典》", 30 April 1986, 中国农业机械出版社，1986年，第1版 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112683745A (en) * | 2020-11-18 | 2021-04-20 | 江苏科技大学 | Heat-force-electroosmosis multi-field coupling soft soil consolidation test box |
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Application publication date: 20200724 |