CN113188901A - Soil sample compression consolidation test system - Google Patents

Soil sample compression consolidation test system Download PDF

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Publication number
CN113188901A
CN113188901A CN202110616065.9A CN202110616065A CN113188901A CN 113188901 A CN113188901 A CN 113188901A CN 202110616065 A CN202110616065 A CN 202110616065A CN 113188901 A CN113188901 A CN 113188901A
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CN
China
Prior art keywords
connecting cylinder
cylinder
test system
consolidation test
piston
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Pending
Application number
CN202110616065.9A
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Chinese (zh)
Inventor
魏厚振
张烁东
李肖肖
阎钶
孟庆山
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Wuhan Institute of Rock and Soil Mechanics of CAS
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Wuhan Institute of Rock and Soil Mechanics of CAS
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Application filed by Wuhan Institute of Rock and Soil Mechanics of CAS filed Critical Wuhan Institute of Rock and Soil Mechanics of CAS
Priority to CN202110616065.9A priority Critical patent/CN113188901A/en
Publication of CN113188901A publication Critical patent/CN113188901A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02Details
    • G01N3/06Special adaptations of indicating or recording means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
    • G01N23/046Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12Pressure testing
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001Type of application of the stress
    • G01N2203/0003Steady
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014Type of force applied
    • G01N2203/0016Tensile or compressive
    • G01N2203/0019Compressive
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003Generation of the force
    • G01N2203/0042Pneumatic or hydraulic means
    • G01N2203/0048Hydraulic means

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  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Pulmonology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Theoretical Computer Science (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses a soil sample compression consolidation test system, and belongs to the technical field of compression consolidation tests. The soil mass sample compression consolidation test system comprises: x-ray computed tomography equipment, a supporting cylinder, a connecting cylinder and a pressurizing device; the supporting cylinder is detachably connected with the connecting cylinder, and the supporting cylinder is communicated with the connecting cylinder; a first end of the pressurizing device penetrates through the connecting cylinder, the middle part of the pressurizing device is slidably arranged in the connecting cylinder, and a second end of the pressurizing device is slidably arranged in the supporting cylinder; the supporting cylinder, the connecting cylinder and the pressurizing device are all arranged in the X-ray computed tomography equipment. The soil mass sample compression consolidation test system can synchronously carry out tomography scanning on the sample in the compression consolidation test process, further analyze the compression condition from the image and know the whole compression consolidation process in more detail.

Description

Soil sample compression consolidation test system
Technical Field
The invention relates to the technical field of compression consolidation tests, in particular to a soil sample compression consolidation test system.
Background
At present, in general foundation treatment design and related foundation consolidation research, compression and consolidation parameters of a foundation soil body need to be obtained, so that the foundation treatment design can be carried out, and the compression consolidation quantity of the foundation and the like can be calculated. Such parameters (compression coefficient av, compression index Cc, consolidation coefficient Cv, etc.) often need to be obtained by compression consolidation tests. When the sand-gravel soil-like particles to be measured are extremely easy to break, the macroscopic mechanical strength of the soil body formed by the sand-gravel soil-like particles should be carefully considered. Through carrying out the compression consolidation test, can study the broken condition of granule simply high-efficiently.
However, when a compression consolidation tester in the prior art is used for researching a breakable sample, particle breakage conditions are often researched by comparing particle grading curves before and after a test, and the particle breakage conditions cannot be synchronously carried out in the experimental process.
Disclosure of Invention
The invention provides a soil sample compression and consolidation test system, which solves or partially solves the technical problem that particle fragmentation conditions can not be synchronously carried out in the experimental process because particle grading curves before and after the test are often compared to research the particle fragmentation conditions when a compression and consolidation tester in the prior art researches an easily-fragmented sample.
In order to solve the technical problem, the invention provides a soil sample compression consolidation test system, which comprises: x-ray computed tomography equipment, a supporting cylinder, a connecting cylinder and a pressurizing device; the supporting cylinder is detachably connected with the connecting cylinder, and the supporting cylinder is communicated with the connecting cylinder; a first end of the pressurizing device penetrates through the connecting cylinder, the middle part of the pressurizing device is slidably arranged in the connecting cylinder, and a second end of the pressurizing device is slidably arranged in the supporting cylinder; the supporting cylinder, the connecting cylinder and the pressurizing device are all arranged in the X-ray computed tomography equipment.
Further, the pressurizing device includes: a piston, a piston ring and a pressure plate; the first end of the piston passes through the connecting cylinder; a piston ring is fixedly arranged in the middle of the piston, the piston ring is slidably arranged in the connecting cylinder, and the outer diameter of the piston ring is matched with the inner diameter of the connecting cylinder; the second end of the piston is fixedly connected with the pressure plate, and the pressure plate is slidably arranged in the support cylinder.
Further, a pressure chamber is formed between an end face of the piston ring, which faces away from the pressure plate, and the connecting cylinder; and the pressure chamber is provided with a pressurizing hole and a pressure relief hole.
Further, the pressurizing device further comprises: cushion blocks; the first end of the cushion block is detachably connected with the second end of the piston, and the second end of the cushion block is detachably connected with the pressing plate.
Furthermore, a through hole is formed in the connecting cylinder; the first end of the piston penetrates through the through hole, and a first sealing ring is arranged in the through hole.
Further, a second seal ring is provided on the circumferential surface of the piston ring.
Further, the soil mass sample compression consolidation test system further comprises: a base; the end part of the support cylinder, which deviates from the connecting cylinder, is detachably arranged on the base.
Further, the soil mass sample compression consolidation test system further comprises: a displacement sensor; the stiff end of displacement sensor with connecting cylinder fixed connection, displacement sensor's measuring terminal with pressure device's first end contact.
Furthermore, the fixed end of the displacement sensor is fixedly connected with the connecting cylinder through a fixing frame.
Further, the soil mass sample compression consolidation test system further comprises: a standard block; the standard block is detachably arranged in the supporting cylinder; the second end of the compression device may press against the standard block.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
because the supporting cylinder is detachably connected with the connecting cylinder, the supporting cylinder is communicated with the connecting cylinder, the first end of the pressurizing device penetrates through the connecting cylinder, the middle part of the pressurizing device is slidably arranged in the connecting cylinder, and the second end of the pressurizing device is slidably arranged in the supporting cylinder, when a compression consolidation test is carried out on a soil sample, the soil sample is put into the supporting cylinder, the middle part of the pressurizing device moves towards the direction of the supporting cylinder in the connecting cylinder, and the second end of the pressurizing device presses the soil sample in the supporting cylinder, and because the supporting cylinder, the connecting cylinder and the pressurizing device are all arranged in the X-ray computed tomography equipment, when the second end of the pressurizing device presses the soil sample in the supporting cylinder, the X-ray computed tomography equipment can synchronously carry out tomography on the soil sample in the compression consolidation test process, and further analyze the compression condition on an image, the whole compression and consolidation process is understood in more detail, so that the research on the interaction mechanism on the microcosmic layer inside the soil mass sample in the compression and consolidation process is realized.
Drawings
Fig. 1 is a schematic structural diagram of a soil mass sample compression consolidation test system provided by an embodiment of the invention.
Detailed Description
Referring to fig. 1, a soil sample compression consolidation test system provided by an embodiment of the present invention includes: x-ray computed tomography equipment, a supporting cylinder 1, a connecting cylinder 2 and a pressurizing device 3.
A support section of thick bamboo 1 is connected with connecting cylinder 2 detachablely, and a support section of thick bamboo 1 and connecting cylinder 2 intercommunication.
The first end of the pressurizing device 3 passes through the connecting cylinder 2, the middle part of the pressurizing device 3 is slidably arranged in the connecting cylinder 2, and the second end of the pressurizing device 3 is slidably arranged in the supporting cylinder 1.
The supporting cylinder 1, the connecting cylinder 2 and the pressurizing device 3 are all arranged in the X-ray computed tomography equipment.
In the embodiment of the application, because the supporting cylinder 1 is detachably connected with the connecting cylinder 2, the supporting cylinder 1 is communicated with the connecting cylinder 2, the first end of the pressurizing device 3 penetrates through the connecting cylinder 2, the middle part of the pressurizing device 3 is slidably arranged in the connecting cylinder 2, and the second end of the pressurizing device 3 is slidably arranged in the supporting cylinder 1, when a compression consolidation test is carried out on a soil sample, the soil sample is put into the supporting cylinder 1, the middle part of the pressurizing device 3 acts towards the direction of the supporting cylinder 1 in the connecting cylinder 2, the second end of the pressurizing device 3 presses the soil sample in the supporting cylinder 1, because the supporting cylinder 1, the connecting cylinder 2 and the pressurizing device 3 are all arranged in the X-ray computed tomography equipment, when the second end of the pressurizing device 3 presses the soil sample in the supporting cylinder 1, the X-ray computed tomography equipment can synchronously carry out tomography on the soil sample in the compression consolidation test, the compression condition is further analyzed from the image, and the whole compression consolidation process is known in more detail, so that the research on the interaction mechanism on the microcosmic layer inside the soil mass sample in the compression consolidation process is realized.
In the embodiment, the support cylinder 1 is detachably connected with the connecting cylinder 2 in a threaded manner, so that a soil body sample can be placed conveniently.
Specifically, the pressurizing device 3 includes: a piston 3-1, a piston ring 3-2 and a pressure plate 3-3.
The first end of the piston 3-1 passes through the connecting cylinder 2.
The middle part of the piston 3-1 is fixedly provided with a piston ring 3-2, the piston ring 3-2 is arranged in the connecting cylinder 2 in a sliding way, and the outer diameter of the piston ring 3-2 is matched with the inner diameter of the connecting cylinder 2.
The second end of the piston 3-1 is fixedly connected with the pressure plate 3-3, and the pressure plate 3-3 is slidably arranged in the supporting cylinder 1.
A pressure chamber 3-5 is formed between the end surface of the piston ring 3-2, which is far away from the pressure plate 3-3, and the connecting cylinder 2; the pressure chamber 3-5 is provided with a pressurizing hole 3-6 and a pressure relief hole 3-7.
When a compression consolidation test is carried out on a soil sample, the soil sample is placed into the supporting cylinder 1, a water pump supplies water to the pressurizing holes 3-6, water enters the pressure chamber 3-5 to realize the step-by-step load application, meanwhile, the pressure relief holes 3-7 are sealed, under the action of water pressure, the piston ring 3-2 is pushed to move towards the supporting cylinder 1 to further drive the piston 3-1 to move towards the supporting cylinder 1, the piston 3-1 drives the pressing plate 3-3 to move towards the supporting cylinder 1 to press the pressing plate 3-3 on the soil sample to carry out the compression consolidation test, the load pressure can reach 10MPa, the pore evolution rule of the samples under the action of high pressure is conveniently researched, the water pump is controlled to supply water to the pressurizing holes 3-6, the load can be stably kept at a fixed level and is not easily influenced by the outside, the test error is effectively reduced, the data obtained in the test are more, the obtained curve is more continuous, and the accuracy of the measured parameters is improved.
Specifically, the pressurizing device further includes: and 3-8 of cushion blocks.
The first end of the cushion block 3-8 is detachably connected with the second end of the piston 3-1, and the second end of the cushion block 3-8 is detachably connected with the pressure plate 3-3.
When the soil sample is small, namely when the height of the sample is 80mm, the cushion block 3-8 is arranged between the piston 3-1 and the pressing plate 3-3, the pressing plate 3-3 is enabled to be pressed on the soil sample, and when the soil sample is large, namely when the height of the sample is 160mm, the cushion block 3-8 is detached from the space between the piston 3-1 and the pressing plate 3-3.
Specifically, a through hole is formed in the connecting cylinder 2; the first end of the piston 3-1 penetrates through the through hole, and a first sealing ring 3-4 is arranged in the through hole and used for ensuring the sealing performance of the pressure chamber 3-5.
Specifically, the piston ring 3-2 is provided on the circumferential surface thereof with a second seal ring 3-9 for ensuring the sealing property of the pressure chamber 3-5.
Specifically, the soil mass sample compression consolidation test system further comprises: a base 4.
The end of the support cylinder 1 facing away from the connecting cylinder 2 is detachably arranged on the base 4. In the present embodiment, the base 4 is provided with a polygonal groove, the end surface of the support cylinder 1 facing the base is polygonal, and the shape of the groove is consistent with the shape of the support cylinder 1 facing the end of the base, so that the support cylinder 1 can be inserted into the groove.
When connecting cylinder 2 and a supporting cylinder 1 threaded connection, will support a section of thick bamboo 1 and offer the polygon recess on the terminal surface embedding base 4 of base in, carry on spacingly to a supporting cylinder 1, be convenient for connecting cylinder 2 and a supporting cylinder 1 threaded connection, when connecting cylinder 2 finishes with a supporting cylinder 1 is connected, will support a section of thick bamboo 1 and offer the polygon recess separation on the terminal surface of base and the base 4.
Specifically, the soil mass sample compression consolidation test system further comprises: and a displacement sensor 5.
The fixed end of the displacement sensor 5 is fixedly connected with the connecting cylinder 2, and the measuring end of the displacement sensor 5 is contacted with the first end of the pressurizing device 3. In the present embodiment, the measuring end of the displacement sensor 5 is in contact with the first end of the piston 3-1 of the pressurizing device 3.
When the piston 3-1 of the pressurizing device 3 drives the pressing plate 3-3 to move towards the direction of the supporting cylinder 1, so that the pressing plate 3-3 is pressed on a soil body sample to carry out a compression consolidation test, the measuring end of the displacement sensor 5 acquires the displacement of the first end of the piston 3-1 of the pressurizing device 3, namely the compression amount in the compression process of the soil body sample can be acquired, and the displacement sensor 5 transmits the compression amount to the experimental data acquisition box.
The fixed end of the displacement sensor 5 is fixedly connected with the connecting cylinder 2 through the fixing frame 6, so that firm connection is guaranteed.
Specifically, the soil mass sample compression consolidation test system further comprises: and a standard block 7.
The standard block 7 is detachably arranged in the supporting cylinder 1, and the second end of the pressurizing device 3 can press on the standard block 7. In the present embodiment, the material of the standard block 7 may be an aluminum alloy.
Before a compression consolidation test is started, a standard block 7 is firstly placed in a supporting cylinder 1, the middle part of a pressurizing device 3 acts towards the supporting cylinder 1 in a connecting cylinder 2, the second end of the pressurizing device 3 presses a soil mass sample in the supporting cylinder 1 to obtain a deformation under a step-by-step pressure, the deformation needs to be subtracted in a future test to reduce a test error, and then a formal test is started to ensure that data obtained by measurement are accurate.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a soil mass sample compression consolidation test system which characterized in that includes: x-ray computed tomography equipment, a supporting cylinder, a connecting cylinder and a pressurizing device;
the supporting cylinder is detachably connected with the connecting cylinder, and the supporting cylinder is communicated with the connecting cylinder;
a first end of the pressurizing device penetrates through the connecting cylinder, the middle part of the pressurizing device is slidably arranged in the connecting cylinder, and a second end of the pressurizing device is slidably arranged in the supporting cylinder;
the supporting cylinder, the connecting cylinder and the pressurizing device are all arranged in the X-ray computed tomography equipment.
2. A soil mass specimen compression consolidation test system as claimed in claim 1, wherein the pressurising means comprises: a piston, a piston ring and a pressure plate;
the first end of the piston passes through the connecting cylinder;
a piston ring is fixedly arranged in the middle of the piston, the piston ring is slidably arranged in the connecting cylinder, and the outer diameter of the piston ring is matched with the inner diameter of the connecting cylinder;
the second end of the piston is fixedly connected with the pressure plate, and the pressure plate is slidably arranged in the support cylinder.
3. The soil mass specimen compression consolidation test system of claim 2, wherein:
a pressure chamber is formed between the end surface of the piston ring, which faces away from the pressure plate, and the connecting cylinder;
and the pressure chamber is provided with a pressurizing hole and a pressure relief hole.
4. The soil sample compressive consolidation test system of claim 2, wherein the pressurization device further comprises: cushion blocks;
the first end of the cushion block is detachably connected with the second end of the piston, and the second end of the cushion block is detachably connected with the pressing plate.
5. The soil mass specimen compression consolidation test system of claim 2, wherein:
the connecting cylinder is provided with a through hole;
the first end of the piston penetrates through the through hole, and a first sealing ring is arranged in the through hole.
6. The soil mass specimen compression consolidation test system of claim 2, wherein:
and a second sealing ring is arranged on the circumferential surface of the piston ring.
7. The soil sample compressive consolidation test system of claim 1, further comprising: a base;
the end part of the support cylinder, which deviates from the connecting cylinder, is detachably arranged on the base.
8. The soil sample compressive consolidation test system of claim 1, further comprising: a displacement sensor;
the stiff end of displacement sensor with connecting cylinder fixed connection, displacement sensor's measuring terminal with pressure device's first end contact.
9. The soil sample compressive consolidation test system of claim 8,
the fixed end of the displacement sensor is fixedly connected with the connecting cylinder through a fixing frame.
10. The soil sample compressive consolidation test system of claim 1, further comprising: a standard block;
the standard block is detachably arranged in the supporting cylinder;
the second end of the compression device may press against the standard block.
CN202110616065.9A 2021-06-02 2021-06-02 Soil sample compression consolidation test system Pending CN113188901A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110616065.9A CN113188901A (en) 2021-06-02 2021-06-02 Soil sample compression consolidation test system

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Application Number Priority Date Filing Date Title
CN202110616065.9A CN113188901A (en) 2021-06-02 2021-06-02 Soil sample compression consolidation test system

Publications (1)

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CN113188901A true CN113188901A (en) 2021-07-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114738349A (en) * 2022-06-09 2022-07-12 中国飞机强度研究所 Loading compensation system and method in airplane vibration fatigue test

Citations (2)

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Publication number Priority date Publication date Assignee Title
CN110376224A (en) * 2019-06-11 2019-10-25 河海大学 CT scan consolidation apparatus and its application method
CN212483131U (en) * 2020-06-30 2021-02-05 长安大学 Miniature high-stress compression instrument for CT continuous scanning

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110376224A (en) * 2019-06-11 2019-10-25 河海大学 CT scan consolidation apparatus and its application method
CN212483131U (en) * 2020-06-30 2021-02-05 长安大学 Miniature high-stress compression instrument for CT continuous scanning

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毛灵涛 等: "软土单轴固结CT实验研究", 《CT理论与应用研究》 *
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114738349A (en) * 2022-06-09 2022-07-12 中国飞机强度研究所 Loading compensation system and method in airplane vibration fatigue test
CN114738349B (en) * 2022-06-09 2022-08-26 中国飞机强度研究所 Loading compensation system and method in airplane vibration fatigue test

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Application publication date: 20210730