CN112964569A - Full-automatic temperature control true triaxial apparatus - Google Patents
Full-automatic temperature control true triaxial apparatus Download PDFInfo
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- CN112964569A CN112964569A CN202110195776.3A CN202110195776A CN112964569A CN 112964569 A CN112964569 A CN 112964569A CN 202110195776 A CN202110195776 A CN 202110195776A CN 112964569 A CN112964569 A CN 112964569A
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- 239000007788 liquid Substances 0.000 claims abstract description 93
- 239000002689 soil Substances 0.000 claims abstract description 33
- 238000004321 preservation Methods 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000012528 membrane Substances 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 230000035939 shock Effects 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 239000011359 shock absorbing material Substances 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 51
- 239000000243 solution Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000011550 stock solution Substances 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000013068 control sample Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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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
- G01N3/18—Performing tests at high or low temperatures
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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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- General Health & Medical Sciences (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a full-automatic temperature control true triaxial apparatus, which relates to the technical field of geotechnical engineering and comprises a pressure chamber, a measuring mechanism and a heat preservation cover, wherein the pressure chamber is arranged on the top wall of an installation frame, the measuring mechanism is arranged inside the pressure chamber for measuring a soil sample, the heat preservation cover is arranged outside the pressure chamber, a heat preservation cover bolt is arranged on the top wall of the installation frame for preserving heat of the pressure chamber, so that the heat exchange between the liquid inside and the outside of the pressure chamber is reduced, the temperature reduction rate is reduced, a confining pressure cover is arranged in the measuring mechanism, the liquid around a sample column is separated from the liquid inside the pressure chamber by adopting the arrangement of the confining pressure chamber, the difficulty in controlling the liquid temperature is reduced, the numerical values such as the liquid temperature around the sample column are more accurately controlled, and the stress-strain relation of a soil body under the real stress state under different temperature states is measured, the method has important significance for researching the influence of the temperature field on the development rule of the stress strain under the three-dimensional stress state of the soil body.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to a full-automatic temperature control true triaxial apparatus.
Background
The soil is a natural and environment-friendly building material with wide distribution and low cost, and is widely applied to geotechnical engineering, including side slopes, refuse landfills, road beds and various geotechnical buildings (such as retaining walls, dams, tunnels and the like). Soil having both water and air in the pores thereof is called unsaturated soil. Unsaturated soil is widely distributed in nature, many regions on the earth surface, especially shallow soil bodies are often in an unsaturated state, and artificial filling, expansive soil, collapsible loess and the like are typical unsaturated soil. The mechanical properties of unsaturated soil such as shear modulus, shear strength and the like are important basis for safe and reliable design of geotechnical engineering. In order to study the mechanical properties of unsaturated soil, it is an effective and common method to perform laboratory tests of various stress paths on soil samples using a triaxial apparatus of unsaturated soil. However, the conventional unsaturated soil triaxial apparatus cannot control the temperature, and most of the unsaturated soil triaxial apparatus is tested at normal temperature.
The soil body in the nature is always in a specific natural environment, the basic properties of the soil body are greatly different along with different conditions of water and temperature, the basic properties of the soil body obtained by neglecting the influence of surrounding environmental factors are inaccurate, and the requirements of actual engineering cannot be met.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a full-automatic temperature control true triaxial apparatus which can realize a soil dynamic true triaxial test under different temperature states (from minus 30 ℃ to 90 ℃) and obtain a stress-strain relation of a saturated soil under a three-dimensional stress state.
In order to achieve the purpose, the invention provides the following technical scheme: including pressure chamber, measuring mechanism and heat preservation cover, the pressure chamber is installed on the roof of mounting bracket, and the inside of pressure chamber is provided with measuring mechanism simultaneously, and measuring mechanism measures the soil sample to the outside of pressure chamber is provided with the heat preservation cover, and the heat preservation cover bolt is installed on the roof of mounting bracket, and wherein the heat preservation cover adopts and separates the temperature material and make, and the top lock of the cover that keeps warm simultaneously is provided with the shroud.
As a further scheme of the invention: the measuring mechanism comprises a loading mechanism, an axial load sensor and a transverse load sensor, wherein the loading mechanism is arranged on the bottom wall of the pressure chamber, a pressure transmitting cap is buckled on the top wall of the loading mechanism, a pressure transmitting plate is arranged on the top wall of the pressure transmitting cap, the pressure transmitting plate is arranged at the bottom of the axial pressure transmitting rod, the other end of the axial pressure transmitting rod is fixedly arranged at the output end of the axial load sensor through a connecting rod, the axial load sensor is fixedly arranged on the top of a supporting plate, a driving rod is fixedly arranged at the top of the supporting plate, the driving rod is slidably arranged in a mounting plate through a piston sleeve, a mounting plate bolt is arranged on the top wall of the pressure chamber, the bottom of the mounting plate is fixedly arranged on the bottom wall of the pressure chamber through a vertical rod, the mounting plate is supported in an auxiliary mode, the driving cylinder is fixedly installed on the top wall of the pressure chamber through the stand column, and meanwhile, a pair of transverse load sensors are arranged on the left side and the right side of the loading mechanism and installed on the bottom wall of the pressure chamber.
As a further scheme of the invention: loading mechanism includes base, sample post, sample membrane and encloses and press the cover, wherein base fixed mounting is on the diapire of pressure chamber, axial water permeable plate has been placed at the top of base simultaneously, and the sample post has been placed at the top of axial water permeable plate, the sample post forms for sample soil pressure casting, wherein the axial water permeable plate has equally been placed at the top of sample post, the top cap is installed to the top of axial water permeable plate simultaneously, and the outside cover of sample post is equipped with the sample membrane, the bottom of sample membrane passes through the snap ring chucking on the outer wall of base, wherein the top of sample membrane compresses tightly on the roof of top cap through passing the pressure cap, be provided with all around enclosing and press the cover simultaneously, enclosing and press the cover to place on the diapire of pressure chamber through placing the board.
As a further scheme of the invention: the confining pressure cover is characterized in that a confining pressure chamber is arranged inside the confining pressure cover, the confining pressure chamber is located outside the sample column, two transverse permeable plates which are symmetrical to each other are slidably arranged inside the confining pressure chamber, the transverse permeable plates are arranged close to two side walls of the sample column, meanwhile, a transverse pressure transmission rod is fixedly arranged on one side wall, away from the sample column, of the transverse permeable plates, the other end of the transverse pressure transmission rod extends out of the side wall of the confining pressure cover, the extending end of the pressure transmission rod is fixedly arranged at the output end of a transverse load sensor, detection of transverse load of the sample column is completed through the transverse load sensor, a liquid inlet pump and a liquid outlet pump are fixedly arranged on the side wall of the confining pressure cover, the liquid inlet pump is located above the liquid outlet pump, and a plurality of heating pipes are.
As a further scheme of the invention: the pressure chamber comprises a bottom plate, a support frame and a top plate, wherein the bottom plate is fixedly installed on the top wall of the installation frame, the base is fixedly installed on the top wall of the bottom plate, the support frame is installed on a top bolt of the bottom plate, the top plate is installed on the top wall of the support frame through a bolt, a through hole is formed in the top plate, a liquid discharge pipe is installed on the top wall of the bottom plate, and a liquid inlet pipe is installed in the top wall of the top plate.
As a further scheme of the invention: the support frame is characterized in that a heat conduction layer is arranged on the inner wall of the support frame and made of heat conduction materials, a liquid guide pipe is wound inside the heat conduction layer, a liquid outlet valve and a liquid inlet valve are respectively arranged at two ends of the liquid guide pipe, and the liquid outlet valve is positioned right above the liquid inlet valve.
As a further scheme of the invention: the outside lock of biography pressure cap has the supporting seat, and the roof of supporting seat links together through connecting rod and backup pad, has seted up annular blind groove on the diapire of supporting seat simultaneously, and the inside slidable mounting in annular blind groove has the picture peg to fixed mounting has a plurality of pressure spring on the roof of picture peg, and pressure spring's other end fixed mounting is on the roof in annular blind groove, corresponds on the roof of enclosing the pressure cover simultaneously and has seted up the ring channel, and the size of ring channel is the same with the picture peg size.
As a further scheme of the invention: the annular liquid storage cavity is formed in the bottom wall of the pressure transmission cap, a water level sensor is fixedly mounted on the inner wall of the liquid storage cavity, a liquid outlet hole is formed in the inner wall of the liquid storage cavity, and a hose is connected to the liquid outlet hole externally.
As a further scheme of the invention: and one sides of the base and the top cover, which are close to the axial permeable plate, are provided with a drainage cavity, wherein the end part of the drainage cavity is provided with a conduit.
As a still further scheme of the invention: and a damping pad is arranged between the pressure chamber and the mounting frame and is made of damping materials.
Compared with the prior art, the invention has the beneficial effects that: the invention is provided with a confining pressure cover, a confining pressure chamber is arranged in the confining pressure cover, the confining pressure chamber is communicated with an external pressure chamber through a liquid inlet pump and a liquid outlet pump, the liquid inlet and outlet in the confining pressure chamber are completed through the liquid inlet pump and the liquid outlet pump, the liquid around the sample column is separated from the liquid in the pressure chamber by the arrangement of the confining pressure chamber, the difficulty of controlling the liquid temperature is reduced, the numerical values of the liquid temperature around the sample column and the like are controlled more accurately, meanwhile, a liquid guide pipe is wound in the support frame of the pressure chamber, a liquid outlet valve and a liquid inlet valve are respectively arranged at two ends of the liquid guide pipe, cooling liquid is led into the liquid guide pipe through the liquid outlet valve and the liquid inlet valve, the high-temperature solution in the pressure chamber is cooled, the influence of the low-temperature solution on the sample soil is simulated, thereby realizing the measurement of the stress-strain relationship of the soil body under the real stress state under different temperature states, the method has important significance for researching the influence of the temperature field on the development rule of the stress strain under the three-dimensional stress state of the soil body.
The measuring result of the instrument can provide necessary parameters for the numerical calculation and the engineering design of geotechnical engineering under different temperature fields, and meanwhile, the measuring result of the instrument can provide necessary test data support for the theoretical research of the soil constitutive theory considering the temperature field.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the measuring mechanism of the present invention.
Fig. 3 is a schematic structural diagram of the loading mechanism of the present invention.
Fig. 4 is a schematic structural view of the pressure chamber of the present invention.
Fig. 5 is a schematic structural view of a pressure transmission cap according to the present invention.
As shown in the figure: 1. pressure chamber, 2, measuring mechanism, 3, heat preservation cover, 4, mounting rack, 5, shock pad, 6, cover cap, 7, upright column, 8, driving cylinder, 9, loading mechanism, 10, top cover, 11, pressure transmission cap, 12, pressure transmission plate, 13, axial pressure transmission rod, 14, connecting rod, 15, axial load sensor, 16, supporting plate, 17, mounting plate, 18, driving rod, 19, piston sleeve, 20, transverse load sensor, 21, base, 22, axial permeable plate, 23, sample column, 24, sample membrane, 25, snap ring, 26, placing plate, 27, confining pressure cover, 28, confining pressure chamber, 29, transverse permeable plate, 30, transverse pressure transmission rod, 31, liquid inlet pump, 32, liquid outlet pump, 33, heating pipe, 34, bottom plate, 35, supporting frame, 36, top plate, 37, liquid outlet pipe, 38, liquid inlet pipe, 39, heat conducting pipe cavity, 40, liquid outlet pipe, 41, liquid outlet valve, 42. liquid inlet valve 43, liquid guide cavity 44, support seat 45, annular blind groove 46, inserting plate 47, compression spring 48, liquid storage cavity 49, water level sensor 50 and liquid outlet hole.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the 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.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; 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 to those skilled in the art.
Referring to fig. 1 to 5, in the embodiment of the present invention, the full-automatic temperature control true triaxial apparatus includes a pressure chamber 1, a measuring mechanism 2 and a heat-insulating cover 3, the pressure chamber 1 is installed on a top wall of an installation frame 4, the measuring mechanism 2 is installed inside the pressure chamber 1, the measuring mechanism 2 measures a soil sample, the heat-insulating cover 3 is installed outside the pressure chamber 1, and the heat-insulating cover 3 is installed on the top wall of the installation frame 4 by bolts, wherein the heat-insulating cover 3 is made of a heat-insulating material and is used for insulating the pressure chamber 1, so as to reduce heat exchange between liquid inside the pressure chamber 1 and outside, reduce a reduction rate of temperature inside the pressure chamber 1, and meanwhile, a cover cap 6 is fastened to the top of the heat-insulating cover 3, so as to facilitate operation inside the heat-insulating cover 3 without repeatedly detaching the heat-insulating cover 3.
Referring to FIGS. 1-3, it can be seen that: the measuring mechanism 2 comprises a loading mechanism 9, an axial load sensor 15 and a transverse load sensor 20, wherein the loading mechanism 9 is installed on the bottom wall of the pressure chamber 1, the loading mechanism 9 is used for placing a sample column 23, the top wall of the loading mechanism 9 is buckled with a pressure transmitting cap 11, a pressure transmitting plate 12 is installed on the top wall of the pressure transmitting cap 11, the pressure transmitting plate 12 is installed at the bottom of an axial pressure transmitting rod 13, the other end of the axial pressure transmitting rod 13 is fixedly installed at the output end of the axial load sensor 20 through a connecting rod 14, so that the axial load of the sample column 23 is measured through the axial load sensor 20, the axial load sensor 15 is fixedly installed on the top of a supporting plate 16, a driving rod 18 is fixedly installed on the top of the supporting plate 16, the driving rod 18 is slidably installed inside a mounting plate 17 through a piston sleeve 19, and the mounting plate 17 is bolted on the top wall, and the bottom of mounting panel 17 is through montant fixed mounting on the diapire of pressure chamber 1, play the effect of auxiliary stay to mounting panel 17, the top fixed mounting of actuating lever 18 is at the output that drives actuating cylinder 8 simultaneously, it installs on the roof of pressure chamber 1 through stand 7 fixed mounting to drive actuating cylinder 8 wherein, control actuating lever 18 through driving actuating cylinder 8 and carry out the elevating movement, thereby control the axial load of sample post 23, the left and right sides of loading mechanism 9 is provided with a pair of horizontal load sensor 20 simultaneously, horizontal load sensor 20 is installed on the diapire of pressure chamber 1, monitor the horizontal load of sample post 23 through horizontal load sensor 20.
Wherein, the loading mechanism 9 comprises a base 21, a sample column 23, a sample film 24 and a confining pressure cover 27, wherein the base 21 is fixedly installed on the bottom wall of the pressure chamber 1, an axial water permeable plate 22 is placed on the top of the base 21, the sample column 23 is placed on the top of the axial water permeable plate 22, the sample column 23 is formed by sample soil pressure casting, the axial water permeable plate 22 is also placed on the top of the sample column 23, a top cover 10 is installed above the axial water permeable plate 22, the sample film 24 is sleeved outside the sample column 23, the bottom of the sample film 24 is clamped on the outer wall of the base 21 through a clamping ring 25, the top of the sample film 24 is pressed on the top wall of the top cover 10 through a pressure transmission cap 11, the installation of the sample column 23 is completed, the confining pressure cover 27 is arranged around the sample column 23, the confining pressure cover 27 is placed on the bottom wall of the pressure chamber 1 through a placing plate 26, a confining pressure chamber 28 is arranged inside the confining pressure cover 27, the confining pressure chamber 28 is located outside the sample column 23, two mutually symmetrical transverse permeable plates 29 are slidably mounted inside the confining pressure chamber 28, the transverse permeable plates 29 are arranged close to two side walls of the sample column 23, a transverse pressure transmission rod 30 is fixedly mounted on one side wall of the transverse permeable plate 29 far away from the sample column 23, the other end of the transverse pressure transmission rod 30 extends out from the side wall of the confining pressure cover 27, the extending end of the pressure transmission rod 30 is fixedly mounted at the output end of the transverse load sensor 20, so that the transverse load of the sample column 23 is detected through the transverse load sensor 20, a liquid inlet pump 31 and a liquid outlet pump 32 are fixedly mounted on the side wall of the confining pressure cover 27, wherein the liquid inlet pump 31 is located above the liquid outlet pump 32, the liquid inlet and outlet in the confining pressure chamber 28 are completed through the liquid inlet pump 31 and the liquid outlet pump 32, and a plurality of heating pipes 33 are fixedly mounted on the inner wall of the confining pressure chamber 28, separate the liquid around the sample post 23 and the inside liquid of pressure chamber 1, the degree of difficulty to liquid temperature control has been reduced, numerical values such as the liquid temperature around more accurate control sample post 23, be convenient for simulate the different environment of sample post 23, the testing result of sample post 23 is more reliable, and can keep warm thermal-insulated to the inside liquid of confining pressure chamber 28 through the inside liquid of pressure chamber 1, 28 inside liquid temperature in confining pressure chamber reduces at the excessive speed in avoiding the experimentation, and lead to the inaccurate phenomenon of test result.
Referring to fig. 4, it can be seen that: the pressure chamber 1 comprises a bottom plate 34, a support frame 35 and a top plate 36, wherein the bottom plate 34 is fixedly arranged on the top wall of the mounting frame 4, the base 21 is fixedly arranged on the top wall of the bottom plate, the support frame 35 is arranged on the top bolt of the bottom plate 34, the top plate 36 is arranged on the top wall of the support frame 35 through a bolt, a through hole is formed in the top plate 36 and used for mounting the mounting plate 17, a liquid discharge pipe 37 is arranged on the top wall of the bottom plate 34, a liquid inlet pipe 38 is arranged in the top plate 36, and liquid inlet and liquid outlet in the pressure chamber 1 are controlled through the liquid discharge pipe 37 and; the interior wall mounting heat-conducting layer 39 of support frame 35, heat-conducting layer 39 adopts the heat conduction material to make, the inside winding of heat-conducting layer 39 has catheter 40 simultaneously, liquid valve 41 and feed liquor valve 42 are installed respectively to the both ends of catheter 40, wherein go out liquid valve 41 and be located feed liquor valve 42 directly over, through going out liquid valve 41 and feed liquor valve 42 to the inside leading-in coolant liquid of guide liquor pipe 40, cool down the high temperature solution of 1 inside of pressure chamber, the influence of simulation low temperature solution to sample soil, the function of device has been increased, satisfy different experimental demands.
Wherein, the outer part of the pressure transmission cap 11 is buckled with a support seat 44, the top wall of the support seat 44 is connected with the support plate 16 through a connecting rod, on one hand, the support function for the support plate 16 is achieved, on the other hand, the pressure transmission cap 11 is sealed through the support seat 44, the liquid is prevented from flowing into the sample column 23 from the top of the sample film 24, meanwhile, the bottom wall of the supporting seat 44 is provided with an annular blind groove 45, an inserting plate 46 is slidably arranged in the annular blind groove 45, and a plurality of compression springs 47 are fixedly arranged on the top wall of the inserting plate 46, the other ends of the compression springs 47 are fixedly arranged on the top wall of the annular blind groove 45, meanwhile, the top wall of the confining pressure cover 27 is correspondingly provided with an annular groove, the size of the annular groove is the same as that of the inserting plate 46, when the support seat 44 is mounted on the top wall of the confining pressure cover 27, the insert plate 46 is pressed in the annular groove by the pressing spring 47, and the sealing of the pressing cap 11 is completed.
Wherein, annular stock solution chamber 48 has been seted up on the diapire of biography pressure cap 11, fixed mounting has level sensor 49 on the inner wall of stock solution chamber 48, and seted up out liquid hole 50 on the inner wall of stock solution chamber 48, it has the hose to go out liquid hole 50 external, when support column seat 44 takes place the weeping, liquid flows into out in the liquid chamber 48, level sensor 49 detects the weeping, when detecting the weeping, in time discharge the weeping through going out liquid hole 50, further avoid the weeping from the top inflow sample post 23 of sample membrane 24, fully guarantee the reliability of experimental result.
Preferably, a liquid guide cavity 43 is formed in one side of the base 21 and the top cover 10 close to the axial permeable plate 22, wherein a conduit is installed at the end of the liquid guide cavity 43, so as to discharge moisture and gas inside the sample column 23 and adjust the pore pressure inside the sample soil.
Preferably, a shock pad 5 is installed between the pressure chamber 1 and the mounting frame 4, and the shock pad 5 is made of shock-absorbing materials, so that the impact force of the pressure chamber 1 on the mounting frame 4 is greatly reduced.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention without departing from the spirit and scope of the invention.
Claims (10)
1. True triaxial apparatus of full-automatic control by temperature change, including pressure chamber (1), measuring mechanism (2) and heat preservation cover (3), its characterized in that: pressure chamber (1) is installed on the roof of mounting bracket (4), and the inside of pressure chamber (1) is provided with measuring mechanism (2) simultaneously, and measuring mechanism (2) are measured soil sample to the outside of pressure chamber (1) is provided with heat preservation cover (3), and heat preservation cover (3) bolt mounting is on the roof of mounting bracket (4), and wherein heat preservation cover (3) adopt to separate the temperature material and make, and the top lock of heat preservation cover (3) is provided with shroud (6) simultaneously.
2. The full-automatic temperature control true triaxial apparatus according to claim 1, wherein: the measuring mechanism (2) comprises a loading mechanism (9), an axial load sensor (15) and a transverse load sensor (20), wherein the loading mechanism (9) is installed on the bottom wall of the pressure chamber (1), the top wall of the loading mechanism (9) is buckled with a pressure transmitting cap (11), the top wall of the pressure transmitting cap (11) is provided with a pressure transmitting plate (12), the pressure transmitting plate (12) is installed at the bottom of an axial pressure transmitting rod (13), the other end of the axial pressure transmitting rod (13) is fixedly installed at the output end of the axial load sensor (20) through a connecting rod (14), the axial load sensor (15) is fixedly installed on the top of a supporting plate (16), the top of the supporting plate (16) is fixedly provided with a driving rod (18), the driving rod (18) is slidably installed inside the mounting plate (17) through a piston sleeve (19), and the mounting plate (17) is installed on the top wall of the pressure chamber (1) through bolts, and the bottom of mounting panel (17) is through montant fixed mounting on the diapire of pressure chamber (1), play the effect of auxiliary stay to mounting panel (17), the top fixed mounting of actuating lever (18) is in the output that drives actuating cylinder (8) simultaneously, wherein drive actuating cylinder (8) and pass through stand (7) fixed mounting on the roof of pressure chamber (1), both sides are provided with a pair of horizontal load sensor (20) about simultaneously loading mechanism (9), horizontal load sensor (20) are installed on the diapire of pressure chamber (1).
3. The full-automatic temperature control true triaxial apparatus according to claim 2, wherein: the loading mechanism (9) comprises a base (21), a sample column (23), a sample membrane (24) and a confining pressure cover (27), wherein the base (21) is fixedly installed on the bottom wall of the pressure chamber (1), an axial water permeable plate (22) is placed at the top of the base (21), the sample column (23) is placed at the top of the axial water permeable plate (22), the sample column (23) is formed by sample soil compression casting, the axial water permeable plate (22) is also placed at the top of the sample column (23), a top cover (10) is installed above the axial water permeable plate (22), the sample membrane (24) is sleeved outside the sample column (23), the bottom of the sample membrane (24) is clamped on the outer wall of the base (21) through a clamping ring (25), the top of the sample membrane (24) is tightly pressed on the top wall of the top cover (10) through a pressure transmission cap (11), and the confining pressure cover (27) is arranged around the sample column (23), the confining pressure cover (27) is placed on the bottom wall of the pressure chamber (1) through a placing plate (26).
4. The full-automatic temperature control true triaxial apparatus according to claim 3, wherein: the device is characterized in that a confining pressure chamber (28) is formed in the confining pressure cover (27), the confining pressure chamber (28) is located on the outer side of the sample column (23), two mutually symmetrical transverse water permeable plates (29) are slidably mounted in the confining pressure chamber (28), the transverse water permeable plates (29) are arranged close to two side walls of the sample column (23), meanwhile, a transverse pressure transmission rod (30) is fixedly mounted on one side wall, away from the sample column (23), of the transverse water permeable plates (29), the other end of the transverse pressure transmission rod (30) extends out of the side wall of the confining pressure cover (27), the extending end of the pressure transmission rod (30) is fixedly mounted at the output end of the transverse load sensor (20), so that the transverse load of the sample column (23) is detected through the transverse load sensor (20), a liquid inlet pump (31) and a liquid outlet pump (32) are fixedly mounted on the side wall of the confining pressure cover (27), wherein the liquid inlet pump (31) is located above the liquid outlet pump (, and a plurality of heating pipes (33) are fixedly arranged on the inner wall of the confining chamber (28).
5. The full-automatic temperature control true triaxial apparatus according to claim 1 or 4, wherein: pressure chamber (1) includes bottom plate (34), support frame (35) and roof (36), wherein bottom plate (34) fixed mounting is on the roof of mounting bracket (4), and base (21) fixed mounting is on the roof of bottom plate, support frame (35) are installed to the top bolt of bottom plate (34) simultaneously, roof (36) are installed to the bolt on the roof of support frame (35), wherein the through-hole has been seted up to the inside of roof (36), fluid-discharge tube (37) are installed to the roof of bottom plate (34) simultaneously, and the internally mounted of roof (36) has feed liquor pipe (38).
6. The full-automatic temperature control true triaxial apparatus according to claim 5, wherein: the inner wall of support frame (35) installs heat-conducting layer (39), and heat-conducting layer (39) adopt the heat conduction material to make, and the inside winding of heat-conducting layer (39) has catheter (40) simultaneously, and liquid valve (41) and feed liquor valve (42) are installed respectively to the both ends of catheter (40), and wherein go out liquid valve (41) and be located feed liquor valve (42) directly over.
7. The full-automatic temperature control true triaxial apparatus according to claim 2, wherein: pass the outside lock of pressure cap (11) and have supporting seat (44), the roof of supporting seat (44) passes through the connecting rod and links together with backup pad (16), annular blind groove (45) have been seted up on the diapire of supporting seat (44) simultaneously, the inside slidable mounting of annular blind groove (45) has picture peg (46), and fixed mounting has a plurality of pressure spring (47) on the roof of picture peg (46), the other end fixed mounting of pressure spring (47) is on the roof of annular blind groove (45), the ring channel has been seted up to corresponding on the roof of enclosing pressure cover (27) simultaneously, the size of ring channel is the same with the size of picture peg (46).
8. The full-automatic temperature control true triaxial apparatus according to claim 7, wherein: annular liquid storage cavity (48) have been seted up on the diapire of biography pressure cap (11), fixed mounting has level sensor (49) on the inner wall of liquid storage cavity (48) to seted up on the inner wall of liquid storage cavity (48) and gone out liquid hole (50), it has the hose to go out liquid hole (50) external.
9. The full-automatic temperature control true triaxial apparatus according to claim 2, wherein: a liquid guide cavity (43) is formed in one side, close to the axial permeable plate (22), of the base (21) and the top cover (10), and a guide pipe is installed at the end part of the liquid guide cavity (43).
10. The full-automatic temperature control true triaxial apparatus according to claim 1, wherein: install shock pad (5) between pressure chamber (1) and mounting bracket (4), shock pad (5) adopt shock-absorbing material to make.
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Application publication date: 20210615 |