CN108051308B - Dynamic and static triaxial test system - Google Patents
Dynamic and static triaxial test system Download PDFInfo
- Publication number
- CN108051308B CN108051308B CN201711475034.6A CN201711475034A CN108051308B CN 108051308 B CN108051308 B CN 108051308B CN 201711475034 A CN201711475034 A CN 201711475034A CN 108051308 B CN108051308 B CN 108051308B
- Authority
- CN
- China
- Prior art keywords
- coarse
- grained soil
- vibration exciter
- pressure
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 53
- 230000003068 static effect Effects 0.000 title claims abstract description 22
- 239000002689 soil Substances 0.000 claims abstract description 100
- 230000008859 change Effects 0.000 claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 158
- 239000004927 clay Substances 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 23
- 238000006073 displacement reaction Methods 0.000 claims description 20
- 239000000428 dust Substances 0.000 claims description 20
- 230000009471 action Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 229920006395 saturated elastomer Polymers 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 230000005284 excitation Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 description 9
- 238000007789 sealing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- 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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
-
- 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
- G01N2203/0026—Combination of several types of applied forces
-
- 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
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
-
- 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
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
-
- 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
- G01N2203/026—Specifications of the specimen
- G01N2203/0284—Bulk material, e.g. powders
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a sound state triaxial test system, belongs to coarse-grained soil test field, including host computer structure, vibration exciter, pressure chamber, body become measuring device and control system, vibration exciter and pressure chamber are installed in host computer structure, and the vibration exciter is used for applys the load to coarse-grained soil, and the pressure chamber is used for placing the coarse-grained soil sample that waits to test, and body becomes measuring device and is used for measuring the volume change of coarse-grained soil sample under the load effect of vibration exciter, and control system is used for controlling vibration exciter and body and becomes measuring device's automatic operation. The dynamic and static triaxial test system can measure the internal and external volume changes of the coarse-grained soil sample in the excitation state, so that various mechanical performance parameters of coarse-grained soil are obtained, the functions are comprehensive and rich, the test result is accurate, the expandability is high, the degree of automation is high, the operation is simple and convenient, and the defects of the existing triaxial test system are effectively overcome.
Description
Technical Field
The invention relates to the field of coarse-grained soil tests, in particular to a dynamic and static triaxial test system.
Background
The unsaturated coarse-grained soil test is widely applied to water conservancy, electric power, metallurgy, mine, geology, large civil buildings, mountain disasters, engineering investigation and design research departments and teaching and research works of higher institutions. And the method is also applied to large dams, highway subgrades, high-speed railway side slopes, metallurgical mines, building investigation designs, resource environments and earthquake-proof research departments to conduct earthquake simulation research.
However, most of the existing coarse-grained soil test systems have the problems of incomplete functions and inaccurate tests.
Disclosure of Invention
The invention aims to provide a dynamic and static triaxial test system which has the characteristics of comprehensive and rich functions, accurate test results and high degree of automation.
Embodiments of the present invention are implemented as follows:
A dynamic and static triaxial test system is used for testing coarse-grained soil samples and comprises a host structure, a vibration exciter, a pressure chamber, a body change measuring device and a control system, wherein the vibration exciter and the pressure chamber are arranged on the host structure, the vibration exciter is used for applying load to coarse-grained soil, the pressure chamber is used for placing coarse-grained soil samples to be tested, the body change measuring device is used for measuring volume change of the coarse-grained soil samples under the load action of the vibration exciter, and the control system is used for controlling automatic operation of the vibration exciter and the body change measuring device.
Further, in a preferred embodiment of the present invention, the main structure includes an upper beam, a lower beam and four columns, two ends of each column are respectively connected to the upper beam and the lower beam, the vibration exciter is disposed on the upper beam, and the pressure chamber is located in a cavity defined by the upper beam, the lower beam and the four columns.
Further, in the preferred embodiment of the invention, the vibration exciter comprises a mounting seat and a power piece, wherein the mounting seat is fixedly arranged on the upper beam, the power piece is an oil cylinder, a cylinder barrel of the oil cylinder is fixedly connected with the mounting seat, and a piston rod of the oil cylinder can linearly reciprocate relative to the cylinder barrel.
Further, in the preferred embodiment of the invention, the mounting seat is in a circular tube shape, the cylinder barrel is in a disc shape, the edge of the cylinder barrel is fixedly connected to one end of the mounting seat, one end of the cylinder is positioned in the mounting seat, the other end of the cylinder is positioned outside the mounting seat, the vibration exciter further comprises a dust cover, the dust cover covers the part of the cylinder positioned outside the mounting seat, and one end of the piston rod positioned outside the mounting seat can linearly reciprocate in the dust cover.
Further, in the preferred embodiment of the invention, a displacement meter is arranged in the dust cover, two ends of the displacement meter are respectively connected with one end of the dust cover far away from the mounting seat and one end of the piston rod outside the mounting seat, and the displacement meter is communicated with the control system.
Further, in a preferred embodiment of the present invention, the pressure chamber includes an upper support, a lower support, an outer wall, and an inner wall, both of which are connected between the upper support and the lower support, and the inner wall is located inside the outer wall, an outer water cavity is formed between the outer wall and the inner wall, the inner wall is used for placing coarse-grained soil samples, and a confining pressure water cavity can be formed between the inner wall and coarse-grained soil.
Further, in a preferred embodiment of the invention, the outer wall is made of a rigid material and the inner wall is made of a flexible material, the flexible material being stainless steel.
Further, in the preferred embodiment of the invention, the upper support is provided with a load applying shaft and a self-balancing water tank, the load applying shaft penetrates through the self-balancing water tank, one end of the load applying shaft props against the coarse soil sample, a piston is arranged in the self-balancing water tank and fixedly connected with the load applying shaft, the piston divides the self-balancing level into an upper cavity and a lower cavity, and the upper cavity and the lower cavity are respectively communicated with the outer water cavity.
Further, in a preferred embodiment of the invention, the body deformation measuring device comprises an outer body deformation measuring device and an inner body deformation measuring device, wherein the outer body deformation measuring device is used for measuring the change of the outer volume of the coarse-grained soil sample under the load action of the vibration exciter, and the inner body deformation measuring device is used for measuring the change of the inner volume of the coarse-grained soil sample under the load action of the vibration exciter.
Further, in a preferred embodiment of the present invention, the external body change measuring device includes an external water source for inputting liquid to the external water cavity, and a confining pressure water source for inputting liquid to the confining pressure water cavity, and the internal body change measuring device includes a hole pressure water source for inputting liquid to the bottom of the coarse-grained soil sample, a back pressure water source for inputting liquid to the bottom of the coarse-grained soil sample, and a clay plate provided on the inner wall of the lower support.
The embodiment of the invention has the beneficial effects that:
The dynamic and static triaxial test system is used for testing coarse-grained soil samples and comprises a host structure, a vibration exciter, a pressure chamber, a body change measuring device and a control system, wherein the vibration exciter and the pressure chamber are arranged on the host structure, the vibration exciter is used for applying load to coarse-grained soil, the pressure chamber is used for placing coarse-grained soil samples to be tested, the body change measuring device is used for measuring the volume change of the coarse-grained soil samples under the load action of the vibration exciter, and the control system is used for controlling the vibration exciter and the body change measuring device to automatically operate. The dynamic and static triaxial test system can measure the internal and external volume changes of the coarse-grained soil sample under the excitation state, so that various mechanical performance parameters of coarse-grained soil are obtained, the functions are comprehensive and rich, the test result is accurate, the expandability is high, the automation degree is high, the operation is simple and convenient, and the defects of the conventional triaxial test system are effectively overcome.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a dynamic and static triaxial test system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a vibration exciter according to an embodiment of the present invention;
FIG. 3 is a schematic diagram showing the connection between a pressure chamber and an external deformation measuring device according to an embodiment of the present invention;
FIG. 4 is a schematic view of the internal structure of a pressure chamber according to an embodiment of the present invention;
fig. 5 is an enlarged view of a portion a of fig. 4;
Fig. 6 is an enlarged view of a portion B of fig. 4;
FIG. 7 is a schematic view of an external water source according to an embodiment of the present invention;
Fig. 8 is a schematic structural diagram of a pressure chamber and an internal body change measuring device according to an embodiment of the present invention.
Icon: 100-a dynamic and static triaxial test system; 200-host structure; 210-upper beam; 220-lower beam; 230-an upright; 300-vibration exciter; 310-mounting base; 320-power piece; 330-sealing the cover; 340-displacement meter; 400-pressure chamber; 410-upper support; 420-a lower support; 430-an outer wall; 440-inner wall; 431-outer water chamber; 441-lumen; 451-confining the pressurized water chamber; 460-a load applying shaft; 470-self-balancing water vat; 480-a voltage stabilizing structure; 481-piston; 482-upper lumen; 483—a lower chamber; 484-flow channel; 500-an external body change measuring device; 510-an outer water source; 511-a metering cylinder; 512-power plant; 520-confining pressure water source; 600-an endosomal variation measurement device; 610-pore pressure water source; 620-back pressure water source; 630-pressure sensor; 640-saturated water tank; 650-a vacuum pump; 700-argil plate.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. 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 invention, as 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 made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, the present embodiment provides a dynamic and static triaxial test system 100 for testing a coarse-grained soil sample to obtain various performance parameters of the coarse-grained soil sample. The dynamic and static triaxial test system 100 comprises a host structure 200, a vibration exciter 300, a pressure chamber 400, a body change measuring device and a control system. The vibration exciter 300 and the pressure chamber 400 are arranged on the main machine structure 200, the vibration exciter 300 is used for applying load to coarse-grained soil, the pressure chamber 400 is used for placing coarse-grained soil samples to be tested, the body change measuring device is used for measuring the volume change of the coarse-grained soil samples under the load action of the vibration exciter 300, and the control system is used for controlling the vibration exciter 300 and the body change measuring device to automatically operate.
The main frame structure 200 includes an upper beam 210, a lower beam 220, and four columns 230, wherein two ends of each column 230 are respectively connected to the upper beam 210 and the lower beam 220, thereby forming a substantially rectangular frame structure.
Referring to fig. 2, the vibration exciter 300 is disposed on the upper beam 210. The vibration exciter 300 may take various structural forms, and in this embodiment, the vibration exciter 300 may include a mounting base 310 and a power member 320. The mounting seat 310 is in a circular tube shape and penetrates through the upper beam 210, the mounting seat 310 is fixedly connected to the upper beam 210, the bottom of the mounting seat is flush with the lower surface of the upper beam 210, and the top of the mounting seat is higher than the upper surface of the upper beam 210.
The power element 320 is an oil cylinder, optionally a bi-directional double-acting low friction seal hydraulic cylinder. The cylinder barrel of the oil cylinder is disc-shaped, the axis of the cylinder barrel coincides with the axis of the mounting seat 310, the edge of the cylinder barrel is fixedly connected to one end of the mounting seat 310, a piston rod of the oil cylinder can linearly reciprocate relative to the cylinder barrel, the piston rod penetrates through the mounting seat 310, two ends of the piston rod are located outside the mounting seat 310, and one end of the piston rod extends into the pressure chamber 400.
In order to prevent dust from entering the cylinder and affecting the normal operation of the cylinder, in this embodiment, the vibration exciter 300 further includes a dust cover, which is substantially in a stepped shaft shape and is of a hollow thin shell structure, and includes a large diameter portion and a small diameter portion that are integrally formed, wherein the large diameter portion is connected to the upper beam 210 and covers a portion of the mounting seat 310 that is higher than the upper surface of the upper beam 210, and the small diameter portion covers a portion of the cylinder that is located outside the mounting seat 310. The end of the piston rod outside the mounting base 310 can reciprocate linearly in the dust cap.
In order to accurately measure the moving distance of the piston rod, a displacement meter 340 is arranged in the dust cover, and the displacement meter 340 is electrically connected with the control system. The displacement meter 340 may take various structural forms, and in this embodiment, the displacement meter 340 is a magnetostrictive displacement sensor. The two ends of the displacement meter 340 are respectively connected with one end of the dust cover far away from the mounting seat 310 and one end of the oil cylinder outside the mounting seat 310. Thus, when the piston rod moves relative to the cylinder, the displacement meter 340 detects the displacement value of the piston rod and feeds it back to the control system for the control system to perform the relevant calculation.
To facilitate the installation and removal of the displacement meter 340, an end of the dust cap remote from the mounting base 310 may be detachably connected with a mounting head. There are many ways of detachable connection, in this embodiment, the mounting head is screwed to the dust cover. The end of the displacement meter 340 remote from the cylinder of the piston 481 is detachably connected to the mounting head.
In this embodiment, the dust cover, the cylinder barrel and the mounting seat 310 may be connected by a plurality of screws, the plurality of screws are disposed along the circumferential direction of the cylinder barrel at intervals, the head of each screw presses the outer wall of the dust cover, and the screw rod sequentially passes through the dust cover and the cylinder barrel and then is locked into the mounting seat 310.
Referring to fig. 3-4, the pressure chamber 400 is located in a cavity defined by the upper beam 210, the lower beam 220, and four columns 230. The pressure chamber 400 may take various forms, and in this embodiment, the pressure chamber 400 includes an upper support 410, a lower support 420, an outer wall 430, and an inner wall 440.
Wherein the outer wall 430 is made of a rigid material and the inner wall 440 is made of a flexible material, optionally the inner wall 440 is made of a stainless steel material. The stainless steel structure has a thickness of 3-5 mm, so that the stainless steel structure not only has good rust resistance, but also has proper elasticity. Outer wall 430 and inner wall 440 are connected between upper support 410 and lower support 420, and inner wall 440 is located within outer wall 430, forming an outer water chamber 431 between outer wall 430 and inner wall 440. The inner wall 440 is used for placing coarse soil samples, and a confining pressure water cavity 451 can be formed between the inner wall 440 and coarse soil.
The upper supporter 410 and the lower supporter 420 are both disc-shaped, and the upper supporter 410 is located above the lower supporter 420. The upper mount 410 is provided with a load applying shaft 460 and a self-balancing water cylinder 470, and the load applying shaft 460 may be a separate part and connected to an end of the piston rod extending into the pressure chamber 400, or may be the piston rod itself. The load applying shaft 460 extends through the self-balancing water cylinder 470 and abuts the coarse soil sample at an end remote from the cylinder. The self-balancing water cylinder 470 is used to assist in maintaining the pressure balance of the outer water chamber 431 and the confining pressure water chamber 451. A piston 481 is provided in the self-balancing water cylinder 470, the piston 481 is fixedly connected to the load applying shaft 460, and the axes of the two are coincident, the piston 481 horizontally divides the self-balancing water cylinder into an upper chamber 482 and a lower chamber 483, and the upper chamber 482 and the lower chamber 483 are respectively communicated with the outer water chamber 431.
In order to enlarge the flow area and ensure the flow rate of the liquid, the side wall of the self-balancing water cylinder 470 is provided with a plurality of flow passages 484, one ends of the flow passages 484 are respectively communicated with the upper chamber 482 and the lower chamber 483, and the other ends are respectively communicated with the outer water chamber 431.
In order to improve the sealing performance of the piston 481, in this embodiment, the piston 481 is provided with a sealing ring, optionally, an annular mounting groove is provided on the circumferential surface of the piston 481, and the sealing ring is sleeved in the annular mounting groove and located between the circumferential surface of the piston 481 and the inner wall of the self-balancing water cylinder 470, so as to effectively ensure the sealing performance between the circumferential surface of the piston 481 and the inner wall of the self-balancing water cylinder 470.
In order to enhance the self-balancing function of the self-balancing cylinder 470, pressure compensators are provided in both the upper and lower chambers 482 and 483, which can absorb pressure when the pressure in the upper and lower chambers 482 and 483 increases and release pressure when the pressure in the upper and lower chambers 482 and 483 decreases. The pressure compensation member may take various structures and forms, and in this embodiment, the pressure compensation member is a bellows accumulator or an air spring.
The principle and process of operation of the present self-balancing vat 470 is as follows:
When the vibration exciter 300 works, the piston 481 moves downwards under the drive of the piston rod, the water pressure in the pressure chamber 400 is compressed, the pressure of the confining pressure water cavity 451 is increased, and meanwhile, the water flowing out of the lower cavity 483 flows into the upper cavity 482 through the flow passage 484 and the outer layer water cavity 431, so that the purpose and effect of self-compensating pressure are achieved. When the piston 481 is reversed, the water in the upper chamber 482 flows to the lower chamber 483 through the flow path 484, which eliminates pressure variation caused by movement of the piston 481 in the pressure chamber 400 upon shock. Meanwhile, the upper chamber and the lower chamber are both provided with a leather bag type energy accumulator or an air spring so as to assist in absorbing water pressure pulsation generated during shock, and the pressure stability of the confining pressure water source 520 can be ensured by matching with the automatic pressure stabilizing function of the confining pressure water source 520, so that a good confining pressure balance and stability function can be achieved.
The self-balancing cylinder is filled with liquid, the specific position of the piston 481 of the self-balancing cylinder can be monitored in real time by using the displacement meter 340, the distance of the piston 481 moving up and down after the self-balancing cylinder is excited along with axial loading can be calculated, and the influence of the dynamic volume of the piston 481 on the volume of the pressure chamber 400 can be calculated. Because the two cavities of the self-balancing cylinder are communicated with each other, liquid automatically circulates alternately, and meanwhile, each of the two cavities is provided with a leather bag type energy accumulator or an air spring with proper volume, the confining pressure change caused by the in-out of the piston 481 during loading excitation can be automatically compensated, the pressure change can be effectively reduced, and favorable conditions are provided for stabilizing the pressure of the confining pressure water cavity 451.
The body-change measuring device includes an outer body-change measuring device 500 and an inner body-change measuring device 600. Referring to fig. 5-7, the external deformation measuring device 500 is used to measure the change of the external volume of the coarse soil sample under the load of the vibration exciter 300. External body-change measuring device 500 includes pressure sensor 630, external water source 510, and confining pressure water source 520, external water source 510 is used for inputting liquid to external water chamber 431, confining pressure water source 520 is used for inputting liquid to confining pressure water chamber 451.
The pressure sensor 630 is used to measure the pressure of the external water source 510 and the confining pressure water source 520, and the pressure sensor 630 is electrically connected to the control system. The external water source 510 and the confining pressure water source 520 comprise a metering hydraulic cylinder 511 and a power structure for injecting the liquid in the metering hydraulic cylinder 511 into the external water cavity 431 and the confining pressure water cavity 451, and the power structure is electrically connected with a control system. The pressure of the outer water cavity 431 and the confining pressure water cavity 451 is monitored by the pressure sensor 630, and the pressure of the outer water cavity 431 and the confining pressure water cavity 451 can be specifically adjusted by controlling the power structure to adjust the liquid in the metering hydraulic cylinder 511 to be injected into the liquid in the outer water cavity 431 and the confining pressure water cavity 451 by the control system, so that the outer water cavity 431 and the confining pressure water cavity 451 are always in a balanced state.
The working principle of the external body change measuring device 500 is as follows:
the sample to be tested is placed in the inner cavity 441 of the pressure chamber 400, and the external deformation measuring device 500 is matched with the external water source 510 through the confining pressure water source 520 to ensure the pressure balance between the external water cavity 431 and the confining pressure water cavity 451.
After the pressure of the outer water cavity 431 and the confining pressure water cavity 451 is balanced, the load and the pressure are applied to the sample arranged in the inner cavity 441 through the load applying shaft 460, and in the process that the sample bears the pressure and the load, the pressure compensation piece and the self-balancing water cylinder 470 cooperate to automatically compensate when the pressure caused by the inlet and outlet of the piston 481 changes, so that the pressure change can be effectively reduced, a better pressure balance and stability function is achieved, the pressure stability in the confining pressure water cavity 451 is further ensured, and an advantage is provided for finally adjusting and stabilizing the confining pressure by the confining pressure water source 520 control system.
Then, when the volume of the sample in the cavity 441 changes, the outer water cavity 431 and the confining pressure water cavity 451 are in a pressure balance state, and the volume of the cavity 441 changes due to the volume change of the sample, so that when the pressure of the confining pressure water cavity 451 is unchanged, the volume of the water injected into the confining pressure water cavity 451 through the confining pressure water source 520 changes due to the volume change of the sample, and the volume change of the water injected into the confining pressure water cavity 451 through the confining pressure water source 520 and the data measured by the displacement meter 340 can accurately calculate the volume variable under the condition that the sample bears the load. The external deformation measuring device 500 can directly measure the volume change of the sample after the external compression (and shearing expansion) of the coarse soil sample.
Referring to fig. 8, the internal variant measuring device is used to measure the change of the internal volume of the coarse soil sample under the load of the vibration exciter 300. The internal body change measuring apparatus 600 includes a pore pressure water source 610 for inputting liquid to the bottom of the coarse soil sample and a back pressure water source 620 for inputting liquid to the bottom of the coarse soil sample 620.
During testing, coarse-grained soil is placed in the inner cavity 441 of the pressure chamber 400, the pore-pressure water source 610 is used for inputting liquid from the bottom of the pressure chamber 400 to the clay plate 700, and the back-pressure water source 620 is used for inputting liquid to the top of the coarse-grained soil sample, so that the top pressure and the bottom pressure of the coarse-grained soil sample in the pressure chamber 400 can be adjusted through the cooperation of the pore-pressure water source 610 and the back-pressure water source 620.
The internal volume-variation measuring device 600 controls the top pressure and the bottom pressure of the coarse-grained soil sample in the pressure chamber 400 by cooperating the pore-pressure water source 610 and the back-pressure water source 620, so as to control the pressure between the top and the bottom of the coarse-grained soil sample. Since part of the water is discharged from the coarse-grained soil sample in the pressure chamber 400 after the internal volume of the coarse-grained soil sample is changed under the pressure and load, the top pressure and the bottom pressure of the coarse-grained soil sample in the pressure chamber 400 are adjusted by the pore-pressure water source 610 and the back-pressure water source 620, so that a pressure difference exists between the top and the bottom of the coarse-grained soil sample (the pressure of the pore-pressure water source 610 is smaller than the pressure of the back-pressure water source 620), and the water discharged from the coarse-grained soil sample due to the internal volume change can be guided to flow out to the pore-pressure water source 610. Therefore, the operation steps are simplified, and more accurate drainage data after the internal volume of the coarse-grained soil sample is changed can be conveniently and directly obtained.
Further, in this embodiment, in order to monitor the pressures of the pore pressure water source 610 and the back pressure water source 620 in real time so as to adjust the water pressures of the pore pressure water source 610 and the back pressure water source 620, pressure sensors 630 are disposed on both the pore pressure water source 610 and the back pressure water source 620.
In order to prevent the coarse soil sample placed in the pressure chamber 400 from being saturated coarse soil, the internal volume change measurement device 600 further includes a structure capable of increasing the saturation of the coarse soil sample.
Specifically, in the present embodiment, the internal body change measuring apparatus 600 includes a saturated water tank 640 for inputting a liquid from the bottom of the pressure chamber 400 to the clay plate 700, and a vacuum pump 650 communicating with the pressure chamber 400. The saturation of the coarse soil sample can be increased by applying head pressure to the coarse soil sample through the saturated water tank 640. In addition, when the coarse soil sample cannot be saturated by the head pressure applied through the saturated water tank 640, the pressure chamber 400 may be vacuumized by the vacuum pump 650 or the coarse soil sample may be saturated by the back pressure of the back pressure water source 620.
The working principle of the internal body change measuring device 600 is:
The top pressure and the bottom pressure of the coarse soil sample in the pressure chamber 400 are controlled by the cooperation of the pore pressure water source 610 and the back pressure water source 620, so as to control the pressure between the top and the bottom of the coarse soil sample. Since part of the water is discharged from the coarse-grained soil sample after the internal volume of the coarse-grained soil sample in the pressure chamber 400 is changed by the external force, the top pressure and the bottom pressure of the coarse-grained soil sample in the pressure chamber 400 are adjusted by the pore-pressure water source 610 and the back-pressure water source 620, so that a pressure difference exists between the top and the bottom of the coarse-grained soil sample (the pressure of the pore-pressure water source 610 is smaller than the pressure of the back-pressure water source 620), and the water discharged from the coarse-grained soil sample due to the internal volume change can be guided to flow out to the pore-pressure water source 610. Thus, the steps of the operation are simplified, and convenience can be realized. More accurate displacement data after internal volume changes of coarse-grained soil samples are directly obtained.
In the process of testing, the internal body change measuring system performs saturation treatment by placing a coarse-grained soil sample to be tested into the inner cavity 441.
Subsequently, an external force test is applied to the coarse soil sample disposed within the inner cavity 441 by the load applying shaft 460. While at the same time ensuring that the outer water chamber 431 and the confining pressure water chamber 451 are pressure balanced and that there is a pressure differential between the top and bottom of the coarse soil sample (the pressure of the pore pressure water source 610 is less than the pressure of the counterpressure water source 620).
The pressure in the outer water chamber 431 is maintained by the self-balancing water cylinder 470 during the external force applied to the coarse soil sample, and causes the external volume change and the internal volume change of the coarse soil sample when the coarse soil sample is applied to the external force.
When the external volume of the coarse soil sample in the inner cavity 441 is changed, the external volume of the coarse soil sample is changed due to the pressure balance between the outer water cavity 431 and the confining pressure water cavity 451, which results in the volume change of the inner cavity 441. Thus, when the pressure of the confining pressure water chamber 451 is not changed, the volume of the water injected into the confining pressure water chamber 451 by the confining pressure water supply structure changes due to the change in volume of the coarse-grained soil sample, and thus the volume of the water injected into the confining pressure water chamber 451 by the confining pressure water supply structure changes, the volume of the sample under load can be calculated more accurately. Therefore, the internal body change measuring system can directly measure the volume change of the sample after the external compression (and shearing expansion) of the coarse-grained soil sample.
At the same time, the coarse soil sample in the pressure chamber 400 is subjected to external force, and the coarse soil sample is subjected to internal volume change, so that the water in the coarse soil sample is discharged after the internal volume change of the coarse soil sample. And the water discharged from the coarse soil sample due to the internal volume change flows out to the pore pressure water source 610 under the guiding action of the pressures of the pore pressure water source 610 and the back pressure water source 620. Therefore, more accurate drainage data of the coarse-grained soil sample under the action of external force can be conveniently and directly obtained.
The clay plate 700 is structurally disposed on the inner wall of the lower support 420 and below the sample to be tested. Specifically, in this embodiment, in order to ensure that the test is performed normally because the structure of the clay plate 700 is easily damaged during the course of the coarse-grained soil test, and without affecting the normal performance of the test, a manner of providing a plurality of clay plates 700 is adopted in this embodiment, which aims at reducing the stress of the clay plates 700 during the test by providing a plurality of clay plates 700 without affecting the flow of the liquid discharged from the coarse-grained soil sample to the pore-pressure water source 610 through the clay plates 700, avoiding the damage of the clay plates 700 during the test, thereby requiring the suspension of the test, and replacing the clay plates 700 in the structure of the clay plates 700. In addition, the arrangement mode can reduce the damage probability of the clay plate 700 and the maintenance cost of the clay plate 700, thereby playing a role in saving test time and test cost.
Next, in order to prevent the construction of the clay plate 700 from being damaged during the course of the coarse soil test, in this embodiment, a mounting plate may be further provided between the protection pad and the clay plate 700, and a plurality of grooves for mounting the plurality of clay plates 700 may be provided on the mounting plate, the plurality of grooves being in one-to-one correspondence with the plurality of clay plates 700, and the clay plate 700 may be further protected by correspondingly mounting the clay plates 700 in the grooves.
In summary, the dynamic and static triaxial test system 100 is used for testing coarse-grained soil samples, and comprises a main machine structure 200, a vibration exciter 300, a pressure chamber 400, a body change measuring device and a control system, wherein the vibration exciter 300 and the pressure chamber 400 are installed on the main machine structure 200, the vibration exciter 300 is used for applying load to coarse-grained soil, the pressure chamber 400 is used for placing coarse-grained soil samples to be tested, the body change measuring device is used for measuring the volume change of coarse-grained soil samples under the load action of the vibration exciter 300, and the control system is used for controlling the automatic operation of the vibration exciter 300 and the body change measuring device. The dynamic and static triaxial test system 100 can measure the internal and external volume changes of the coarse-grained soil sample in the excitation state, so that various mechanical performance parameters of coarse-grained soil are obtained, the functions are comprehensive and rich, the test results are accurate, the expandability is high, the automation degree is high, the operation is simple and convenient, and the defects of the existing triaxial test system are effectively overcome.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The dynamic and static triaxial test system is used for testing coarse-grained soil samples and is characterized by comprising a host structure, a vibration exciter, a pressure chamber, a body change measuring device and a control system, wherein the vibration exciter and the pressure chamber are arranged on the host structure, the vibration exciter is used for applying load to coarse-grained soil, the pressure chamber is used for placing coarse-grained soil samples to be tested, the body change measuring device is used for measuring the volume change of the coarse-grained soil samples under the load action of the vibration exciter, and the control system is used for controlling the vibration exciter and the body change measuring device to automatically operate;
the pressure chamber comprises an upper support, a lower support, an outer wall and an inner wall, wherein the outer wall and the inner wall are connected between the upper support and the lower support, the inner wall is positioned in the outer wall, an outer water cavity is formed between the outer wall and the inner wall, and a surrounding pressure water cavity can be formed between the inner wall and coarse-grained soil;
The internal body change measuring device is used for measuring the change of the internal volume of the coarse-grained soil sample under the load action of the vibration exciter and comprises a hole pressure water source, a back pressure water source and a clay plate, wherein the hole pressure water source is used for inputting liquid to the bottom of the coarse-grained soil sample, the back pressure water source is used for inputting liquid to the top of the coarse-grained soil sample, the clay plate is arranged on the inner wall of the lower support, and the internal body change measuring device further comprises a saturated water tank used for inputting liquid to the clay plate from the bottom of the pressure chamber and a vacuum pump communicated with the pressure chamber;
The self-balancing water tank is characterized in that the upper support is provided with a load applying shaft and a self-balancing water tank, the load applying shaft penetrates through the self-balancing water tank, one end of the load applying shaft props against the coarse-grained soil sample, a piston is arranged in the self-balancing water tank and fixedly connected with the load applying shaft, the piston horizontally separates the self-balancing water tank into an upper cavity and a lower cavity, the upper cavity and the lower cavity are respectively communicated with the outer water cavity, the side wall of the self-balancing water tank is provided with a plurality of flow channels, one ends of the flow channels are respectively communicated with the upper cavity and the lower cavity, and the other ends of the flow channels are respectively communicated with the outer water cavity.
2. The dynamic and static triaxial test system according to claim 1, wherein the main machine structure comprises an upper beam, a lower beam and four upright posts, two ends of each upright post are respectively connected to the upper beam and the lower beam, the vibration exciter is arranged on the upper beam, and the pressure chamber is located in a cavity defined by the upper beam, the lower beam and the four upright posts.
3. The dynamic and static triaxial test system according to claim 2, characterized in that the vibration exciter comprises a mounting seat and a power part, the mounting seat is fixedly mounted on the upper beam, the power part is an oil cylinder, a cylinder barrel of the oil cylinder is fixedly connected to the mounting seat, and a piston rod of the oil cylinder can linearly reciprocate relative to the cylinder barrel.
4. The dynamic and static triaxial test system according to claim 3, wherein the mounting seat is in a circular tube shape, the cylinder is disc-shaped and is fixedly connected to one end of the mounting seat at the edge, the piston rod penetrates through the mounting seat and is respectively located outside the mounting seat at two ends, the vibration exciter further comprises a dust cover, the dust cover covers the position, located outside the mounting seat, of the oil cylinder, and one end, located outside the mounting seat, of the piston rod can linearly reciprocate at the dust cover.
5. The dynamic and static triaxial test system according to claim 4, wherein a displacement meter is arranged in the dust cover, two ends of the displacement meter are respectively connected with one end of the dust cover away from the mounting seat and one end of the piston rod located outside the mounting seat, and the displacement meter is communicated with the control system.
6. The dynamic and static triaxial test system according to claim 1, characterized in that the outer layer wall is made of a rigid material and the inner layer wall is made of a flexible material, the flexible material being stainless steel.
7. The dynamic and static triaxial test system according to claim 1, characterized in that the body-change measuring device comprises an external body-change measuring device for measuring the change of the external volume of the coarse-grained soil sample under the load of the vibration exciter.
8. The dynamic and static triaxial test system according to claim 7, characterized in that the external body change measuring device includes an external water source for inputting liquid to the external water chamber and a confining pressure water source for inputting liquid to the confining pressure water chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711475034.6A CN108051308B (en) | 2017-12-29 | 2017-12-29 | Dynamic and static triaxial test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711475034.6A CN108051308B (en) | 2017-12-29 | 2017-12-29 | Dynamic and static triaxial test system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108051308A CN108051308A (en) | 2018-05-18 |
| CN108051308B true CN108051308B (en) | 2024-05-14 |
Family
ID=62128960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711475034.6A Active CN108051308B (en) | 2017-12-29 | 2017-12-29 | Dynamic and static triaxial test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108051308B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007787A (en) * | 2017-12-29 | 2018-05-08 | 中国科学院武汉岩土力学研究所 | Balancing gate pit and sound state triaxial test system |
| CN108007786B (en) * | 2017-12-29 | 2024-05-14 | 成都东华卓越科技有限公司 | Double-layer pressure chamber and external body change measuring system |
| CN109060851B (en) * | 2018-08-16 | 2020-12-01 | 长安大学 | Micro loess unsaturated suction control loading device and method for separable pressure chamber |
| CN110940578A (en) * | 2019-12-24 | 2020-03-31 | 南京理工大学 | True triaxial loading test device for large-size frozen soil |
| CN112461675A (en) * | 2020-12-01 | 2021-03-09 | 云南云水工程技术检测有限公司 | Coarse-grained soil vibration triaxial test device and method |
| CN113295597B (en) * | 2021-06-11 | 2022-04-26 | 中南大学 | Testing device and testing method for simulating characteristics of ballast particles under cyclic loading action |
| CN114112769B (en) * | 2021-11-24 | 2022-07-22 | 中国水利水电科学研究院 | Triaxial tester pressure chamber piston friction force calibration method and device |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1641350A (en) * | 2005-01-07 | 2005-07-20 | 清华大学 | Large-sized multifunction material three-shaft static-dynamic test machine |
| CN101592574A (en) * | 2009-06-30 | 2009-12-02 | 三峡大学 | Triaxial creep tester of unsaturated soil |
| CN201983979U (en) * | 2011-01-11 | 2011-09-21 | 中国水利水电科学研究院 | Non-saturated body variable measuring device of dynamic and static triaxial tester |
| CN102539244A (en) * | 2012-02-21 | 2012-07-04 | 上海大学 | Unsaturated soil anisotropic consolidation test device |
| CN102818726A (en) * | 2012-08-30 | 2012-12-12 | 中国科学院力学研究所 | Stress path full-automatic hydraulic servo control type rigid-flexible multifunctional triaxial apparatus |
| CN104048879A (en) * | 2014-07-02 | 2014-09-17 | 南京力淮软件科技有限公司 | Full-automatic three-axis testing system for saturated soil stress path |
| CN104614256A (en) * | 2015-02-06 | 2015-05-13 | 河海大学 | Temperature-controlled cold-hot cyclic unsaturated soil triaxial instrument |
| CN104749042A (en) * | 2015-04-09 | 2015-07-01 | 西南交通大学 | Suction force controllable unsaturated soil static triaxial apparatus based on internal body variable precision measurement |
| CN106323999A (en) * | 2016-08-12 | 2017-01-11 | 中国科学院地质与地球物理研究所 | Intervention enhancement imaging method for rock hydrofracture test cracks |
| CN106644750A (en) * | 2016-12-07 | 2017-05-10 | 凌贤长 | Dynamic and static triaxial tester for frozen and thawed soil in open system |
| CN107907425A (en) * | 2017-12-29 | 2018-04-13 | 成都东华卓越科技有限公司 | A kind of inner body becomes measuring device and sound state triaxial test system |
| CN107907426A (en) * | 2017-12-29 | 2018-04-13 | 中国科学院武汉岩土力学研究所 | Vibrator and sound state triaxial test system |
| CN108007787A (en) * | 2017-12-29 | 2018-05-08 | 中国科学院武汉岩土力学研究所 | Balancing gate pit and sound state triaxial test system |
| CN108007786A (en) * | 2017-12-29 | 2018-05-08 | 成都东华卓越科技有限公司 | A kind of double pressure room and ectosome become measuring system |
| CN207894743U (en) * | 2017-12-29 | 2018-09-21 | 中国科学院武汉岩土力学研究所 | Vibrator and sound state triaxial test system |
| CN207894742U (en) * | 2017-12-29 | 2018-09-21 | 中国科学院武汉岩土力学研究所 | Balancing gate pit and sound state triaxial test system |
| CN207894744U (en) * | 2017-12-29 | 2018-09-21 | 成都东华卓越科技有限公司 | Sound state triaxial test system |
| CN207908273U (en) * | 2017-12-29 | 2018-09-25 | 成都东华卓越科技有限公司 | A kind of inner body becomes measuring device and sound state triaxial test system |
| CN207908272U (en) * | 2017-12-29 | 2018-09-25 | 成都东华卓越科技有限公司 | A kind of double pressure room and ectosome become measuring system |
-
2017
- 2017-12-29 CN CN201711475034.6A patent/CN108051308B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1641350A (en) * | 2005-01-07 | 2005-07-20 | 清华大学 | Large-sized multifunction material three-shaft static-dynamic test machine |
| CN101592574A (en) * | 2009-06-30 | 2009-12-02 | 三峡大学 | Triaxial creep tester of unsaturated soil |
| CN201983979U (en) * | 2011-01-11 | 2011-09-21 | 中国水利水电科学研究院 | Non-saturated body variable measuring device of dynamic and static triaxial tester |
| CN102539244A (en) * | 2012-02-21 | 2012-07-04 | 上海大学 | Unsaturated soil anisotropic consolidation test device |
| CN102818726A (en) * | 2012-08-30 | 2012-12-12 | 中国科学院力学研究所 | Stress path full-automatic hydraulic servo control type rigid-flexible multifunctional triaxial apparatus |
| CN104048879A (en) * | 2014-07-02 | 2014-09-17 | 南京力淮软件科技有限公司 | Full-automatic three-axis testing system for saturated soil stress path |
| CN104614256A (en) * | 2015-02-06 | 2015-05-13 | 河海大学 | Temperature-controlled cold-hot cyclic unsaturated soil triaxial instrument |
| CN104749042A (en) * | 2015-04-09 | 2015-07-01 | 西南交通大学 | Suction force controllable unsaturated soil static triaxial apparatus based on internal body variable precision measurement |
| CN106323999A (en) * | 2016-08-12 | 2017-01-11 | 中国科学院地质与地球物理研究所 | Intervention enhancement imaging method for rock hydrofracture test cracks |
| CN106644750A (en) * | 2016-12-07 | 2017-05-10 | 凌贤长 | Dynamic and static triaxial tester for frozen and thawed soil in open system |
| CN107907425A (en) * | 2017-12-29 | 2018-04-13 | 成都东华卓越科技有限公司 | A kind of inner body becomes measuring device and sound state triaxial test system |
| CN107907426A (en) * | 2017-12-29 | 2018-04-13 | 中国科学院武汉岩土力学研究所 | Vibrator and sound state triaxial test system |
| CN108007787A (en) * | 2017-12-29 | 2018-05-08 | 中国科学院武汉岩土力学研究所 | Balancing gate pit and sound state triaxial test system |
| CN108007786A (en) * | 2017-12-29 | 2018-05-08 | 成都东华卓越科技有限公司 | A kind of double pressure room and ectosome become measuring system |
| CN207894743U (en) * | 2017-12-29 | 2018-09-21 | 中国科学院武汉岩土力学研究所 | Vibrator and sound state triaxial test system |
| CN207894742U (en) * | 2017-12-29 | 2018-09-21 | 中国科学院武汉岩土力学研究所 | Balancing gate pit and sound state triaxial test system |
| CN207894744U (en) * | 2017-12-29 | 2018-09-21 | 成都东华卓越科技有限公司 | Sound state triaxial test system |
| CN207908273U (en) * | 2017-12-29 | 2018-09-25 | 成都东华卓越科技有限公司 | A kind of inner body becomes measuring device and sound state triaxial test system |
| CN207908272U (en) * | 2017-12-29 | 2018-09-25 | 成都东华卓越科技有限公司 | A kind of double pressure room and ectosome become measuring system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108051308A (en) | 2018-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108051308B (en) | Dynamic and static triaxial test system | |
| CN207894743U (en) | Vibrator and sound state triaxial test system | |
| CN107907425B (en) | Internal body change measuring device and dynamic and static triaxial test system | |
| CN103712740B (en) | Flat pressure sensor dynamic high-pressure calibrating installation | |
| Clayton et al. | The design of diaphragm-type boundary total stress cells | |
| CN102818726A (en) | Stress path full-automatic hydraulic servo control type rigid-flexible multifunctional triaxial apparatus | |
| CN108007787A (en) | Balancing gate pit and sound state triaxial test system | |
| CN104390845A (en) | Portable multifunctional soil mechanical property test device | |
| CN103245458A (en) | Half-sine quasi-static calibration device of force sensor | |
| CN108007786B (en) | Double-layer pressure chamber and external body change measuring system | |
| CN103822831B (en) | A kind of rigidity following loading framed structure | |
| CN107907426A (en) | Vibrator and sound state triaxial test system | |
| KR20120068103A (en) | Method for tri-axial compression test of unsaturated soils and intermediate soils | |
| CN105627896A (en) | Bridge flexibility detection device and detection method | |
| CN105716959A (en) | Foundation pit model test device capable of simulating dynamic change of underground water level | |
| CN109374498A (en) | A kind of Single Fracture Seepage of Rock Masses stress coupling system and method | |
| CN207894742U (en) | Balancing gate pit and sound state triaxial test system | |
| Cabarkapa et al. | Automated triaxial apparatus for testing unsaturated soils | |
| CN207894744U (en) | Sound state triaxial test system | |
| CN104849143A (en) | Uniaxial tension device and testing method thereof | |
| CN207231976U (en) | A kind of different temperatures, the lower rock permeability factor detection device of pressure effect | |
| CN106066298A (en) | Based on flat sample unsaturated soil triaxial test volume measurement device and measuring method | |
| CN202661279U (en) | Static test device of hydraulic damper | |
| CN102830018A (en) | Determination method and apparatus for coefficient of earth pressure at rest | |
| Brown et al. | An instrumented triaxial cell for cyclic loading of clays |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |