CN103604697B - Fake triaxial creeping device and method for geotechnical engineering under uniform confining pressure - Google Patents

Fake triaxial creeping device and method for geotechnical engineering under uniform confining pressure Download PDF

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Publication number
CN103604697B
CN103604697B CN201310598127.3A CN201310598127A CN103604697B CN 103604697 B CN103604697 B CN 103604697B CN 201310598127 A CN201310598127 A CN 201310598127A CN 103604697 B CN103604697 B CN 103604697B
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China
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sheet
flexible
pieces
test specimen
pressure
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CN201310598127.3A
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Chinese (zh)
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CN103604697A (en
Inventor
王庆瀚
李术才
李利平
何敬源
张乾青
许振浩
石少帅
王旌
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山东大学
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Abstract

The invention discloses a fake triaxial creeping device for geotechnical engineering under a uniform confining pressure. The fake triaxial creeping device comprises a force applying device, wherein the force applying device is contacted with one end of a test piece needing to be tested by a pressure sensor; readings of a control sensor guarantee that an applied axial force of the force applying device is constant; a rubber ring covers the outer part of the test piece so as to ensure that the confining pressure is applied uniformly and vertically; a sheet-shaped flexible material piece is uniformly wound at the outer part of the rubber ring; one end of the sheet-shaped flexible material piece is fixedly arranged on a clamp and the other end of the sheet-shaped flexible material piece is movably connected to a loading device; a uniform pull force on the sheet-shaped flexible material piece finally acts on the test piece by the loading device to finish the application of the confining pressure. The invention simultaneously discloses an operation method of the device. The fake triaxial creeping device can effectively guarantee that the confining pressure is applied uniformly and vertically; the experiment efficiency is improved and the experiment operation is convenient.

Description

For the false triaxial creepage device and method under Geotechnical Engineering Even round pressure

Technical field

The present invention relates to a kind of Geotechnical Engineering, especially a kind of for the false triaxial creepage device and method under Geotechnical Engineering Even round pressure.

Background technology

At present, creep refers to that solid material is keeping under the condition that stress is constant, the phenomenon that strain extends in time and increases.It is different from plastic yield, and plastic yield just occurs usually after stress exceedes limit of elasticity, as long as and the action time of creep stress quite long, it also can occur when stress is less than limit of elasticity.

In Geotechnical Engineering, creep is very general, and a lot of Geotechnical Engineering disaster is also closely bound up with Rock And Soil creep, and as landslide, landslide, settlement of foundation etc., therefore study Rock And Soil creep very necessary, this is also the important guarantee of geotechnical engineering safety.

At present, both at home and abroad Rock And Soil creep is conducted in-depth research, corresponding experimental provision arises at the historic moment, and single shaft creep test device is comparatively general, but can not the actual forced status of accurate description test specimen, false triaxial creep testing machine adopts oil pressure to apply circumferential pressure, operate very loaded down with trivial details, and labor intensive material resources, other devices are also the close approximation of confined pressure, hoop cannot be reached and apply pressure uniformly, be difficult to reach current creep test.

Summary of the invention

The object of the invention is for overcoming above-mentioned the deficiencies in the prior art, providing a kind of for the false triaxial creepage device and method under Geotechnical Engineering Even round pressure, it effectively can ensure that the uniform vertical of confined pressure applies, and improves conventional efficient, facilitates experimental implementation.

For achieving the above object, the present invention adopts following technical proposals:

A kind of for the false triaxial creepage device under Geotechnical Engineering Even round pressure, comprise augmentor, augmentor is through pressure transducer and the test specimen end thereof contacts needing to test, ensure that augmentor applies the constant of axial compression by the reading controlling sensor, test specimen outer wrap has rubber ring, ensure that the uniform vertical of confined pressure applies, the outside uniform winding of rubber ring has sheet-like flexible material pieces, one end of sheet-like flexible material pieces is fixed on fixture, the other end is movably connected on charger, finally test specimen is acted on by the uniform tension of charger to sheet-like flexible material pieces, complete the applying of confined pressure.

Described test specimen is fixed on the horizontal component that section is L shape base, and base vertical portion is provided with fixture.

Described base vertical portion upper surface and two side intersections are respectively equipped with the roller of pressing base length direction, and roller can reduce friction, ensures the accurate applying of confined pressure.

Described fixture comprises the first component be fixed on base vertical portion upper surface, and the second component be connected to by web member on first component, and corresponding with second component of first component is respectively equipped with intermeshing toothed member, one end of flexible material layer is anchored between first component and the toothed member of second component by web member.

The first component side corresponding with test specimen is the arcuate structure matched with test specimen outside surface.

Described first component is provided with the hole passed for sheet flexible material part.

Described charger comprises loading pallet, and load center on tray upper surface and be provided with loading pallet engaging lug, described engaging lug is provided with axis hole, and the centre position of sheet-like flexible material pieces one end is connected on described engaging lug through axis hole by rotating shaft.Load pallet and sheet-like flexible material pieces central shaft hinged, force action, in sheet-like flexible material pieces center, prevents test specimen to be subject to bias voltage.

Described augmentor is lifting jack.

For a method of operating for the false triaxial creepage device under Geotechnical Engineering Even round pressure, comprising:

(1) creep device is placed in testing table edge, and device pedestal is fixed on testing table;

(2) rubber ring is wrapped creep test specimen, lie against on testing table, by fixture, sheet-like flexible material pieces one end of known features is fixed on fixture, after wrapping test specimen, sheet-like flexible material pieces end is hung down and loading pallet is fixed on sheet-like flexible material pieces end;

(3) creep confined pressure is set, and conversion corresponding loading counterweight weight, counterweight is placed on and loads in pallet;

(4) contrast test is set, the counterweight of equivalent weight is directly acted on the sheet-like flexible material pieces of same length, offset the error that the creep of sheet-like flexible material pieces self brings;

(5) after confined pressure loads and stablizes, applying axial compression by lifting jack, by controlling the reading of sensor, controlling the constant of axial compression;

(6) initial position of jack end and sheet-like flexible material pieces end is recorded, again record is carried out every the corresponding time, by the drop-out value of sheet-like flexible material pieces end, calculate the change in radius of test specimen, draw hoop strain, obtain test specimen axial strain by record axial displacement, finally obtain the creep characteristic curve of test specimen;

(7) change circumferential pressure and axle pressure value, repeat above operation, obtain the creep properties of test specimen under different acting force.

The present invention evenly wraps up test specimen by sheet-like flexible material pieces, finally acting on test specimen, completing the applying of confined pressure by loading the uniform tension of counterweight to sheet-like flexible material pieces; Load pallet and sheet-like flexible material pieces central shaft hinged, force action, in sheet-like flexible material pieces center, prevents test specimen to be subject to bias voltage; Test specimen hoop is wrapped up by rubber ring, ensures that the uniform vertical of confined pressure applies further; The lifting jack that is applied through of axial compression loads realization, settles pressure transducer between lifting jack and test specimen; The constant of axial compression is ensured by the reading controlling sensor.

The sheet-like flexible material pieces pulling force that confined pressure is provided by gravitational load, and then act on around test specimen, sheet-like flexible material pieces transition location arranges roller, reduces friction, ensures the accurate applying of confined pressure.

The mode of sheet-like flexible material pieces parcel test specimen applies confined pressure, and wherein sheet-like flexible material pieces creep properties is known, can be tried to achieve the perimeter change of test specimen, thus extrapolate test specimen hoop strain by the deflection of sheet-like flexible material pieces loaded segment.

The loading pallet and the sheet-like flexible material pieces distal center that apply confined pressure are hinged, effectively prevent from tilting to load producing moment of flexure, avoid the generation of partially drawing phenomenon, warranty test precision.

With rubber ring parcel around test specimen, ensure that the uniform vertical of confined pressure applies, meet the requirement of low-intensity experiment, improve precision.

The lifting jack that is applied through of axial compression loads realization, by the reading of controlled pressure sensor, ensures the accurately constant of axial compression suffered by test specimen.

The present invention has the following advantages compared with measuring method in the past:

1 the invention solves the inconvenience in experiment in the past, and apply confined pressure by the mode of sheet-like flexible material pieces parcel test specimen, the uniform vertical reaching confined pressure applies.

Wrap up rubber ring around 2 test specimens, confined pressure is applied more even, and avoid unnecessary frictional influence.

3 by setting up the mode of contrast test, offsets the error that the creep of sheet-like flexible material pieces self brings, obtain real test specimen perimeter change, thus draw test specimen hoop strain.

4 load pallet by sheet-like flexible material pieces distal center, and are hinged, avoid and tilt to load the Moment Influence brought, prevent sheet-like flexible material pieces to be subject to partially drawing effect.

The installation of 5 pressure transducers ensure that the constant of creep confined pressure, ensures the accuracy of creep test.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

Fig. 2 is other direction view of the present invention;

Wherein 1 lifting jack; 2 pressure transducers; 3 rubber rings; 4 creep test specimens; 5 stationary fixtures; 6 fixed screws; 7 sheet-like flexible material pieces; 8 load tray rotating shaft; 9 load pallet; 10 rotation rollers; 11 instrument firm bankings.

Embodiment

Below in conjunction with drawings and Examples, the present invention is further described.

For the false triaxial creepage new device under Geotechnical Engineering Even round pressure, top mainly comprises instrument firm banking 11, rotation roller 10, lifting jack 1, pressure transducer 2, rubber ring 3, creep test specimen 4, stationary fixture 5, fixed screw 6; Centre is sheet-like flexible material pieces 7, and bottom, for loading tray rotating shaft 8, loads pallet 9.The pressure transducer 2 of its middle and upper part is embedded between lifting jack 1 and creep test specimen 4, wrap up with rubber ring 3 around test block, sheet-like flexible material pieces 7 one end is fixed on stationary fixture 5, fastening with screw 6, and uniform winding rubber ring 3, by rotation roller 10, the embedding loading tray rotating shaft 8 of the other end, fixing loading pallet 9 below tray rotating shaft.

A kind ofly put for the false triaxial creepage under Geotechnical Engineering Even round pressure, method of operating comprises the following steps:

(1) creep device is placed in testing table edge, and device pedestal is fixed on testing table.

(2) rubber ring 3 is wrapped creep test specimen 4, lie against on testing table, by stationary fixture 5, the sheet-like flexible material pieces 7 one sections of known features is fixed on device, after wrapping creep test specimen 4, sheet-like flexible material pieces 7 end is hung down, and loading pallet is fixed 8 at sheet-like flexible material pieces 7 end.

(3) creep confined pressure is set, and conversion corresponding loading counterweight weight, counterweight is placed on and loads in pallet 9.

(4) contrast test is set, the counterweight of equivalent weight is directly acted on the sheet-like flexible material pieces 7 of same length, offset the error that self creep of sheet-like flexible material pieces 7 brings.

(5) after confined pressure loads and stablizes, applying axial compression by lifting jack 1, by controlling the reading of sensor 2, controlling the constant of axial compression.

(6) initial position of lifting jack 1 end and sheet-like flexible material pieces 7 end is recorded, again record is carried out every the corresponding time, by the drop-out value of sheet-like flexible material pieces 7 end, calculate the change in radius of creep test specimen 4, draw hoop strain, obtain creep test specimen 4 axial strain by record axial displacement, finally obtain the creep characteristic curve of test specimen.

(7) change circumferential pressure and axle pressure value, repeat above operation, obtain the creep properties of test specimen under different acting force.

By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.

Claims (9)

1. one kind for the false triaxial creepage device under Geotechnical Engineering Even round pressure, it is characterized in that, comprise augmentor, augmentor is through pressure transducer and the test specimen end thereof contacts needing to test, ensure that augmentor applies the constant of axial compression by the reading controlling sensor, test specimen outer wrap has rubber ring, ensure that the uniform vertical of confined pressure applies, the outside uniform winding of rubber ring has sheet-like flexible material pieces, one end of sheet-like flexible material pieces is fixed on fixture, the other end is movably connected on charger, finally test specimen is acted on by the uniform tension of charger to sheet-like flexible material pieces, complete the applying of confined pressure.
2. as claimed in claim 1 for the false triaxial creepage device under Geotechnical Engineering Even round pressure, it is characterized in that, described test specimen is fixed on the horizontal component that section is the base of L shape, and base vertical portion is provided with fixture.
3. as claimed in claim 2 for the false triaxial creepage device under Geotechnical Engineering Even round pressure, it is characterized in that, described base vertical portion upper surface and two side intersections are respectively equipped with the roller along base length direction, and roller can reduce friction, ensure the accurate applying of confined pressure.
4. as claimed in claim 2 for the false triaxial creepage device under Geotechnical Engineering Even round pressure, it is characterized in that, described fixture comprises the first component be fixed on base vertical portion upper surface, and the second component be connected to by web member on first component, and corresponding with second component of first component is respectively equipped with intermeshing toothed member, one end of flexible material layer is anchored between first component and the toothed member of second component by web member.
5. as claimed in claim 4 for the false triaxial creepage device under Geotechnical Engineering Even round pressure, it is characterized in that, the first component side corresponding with test specimen is the arcuate structure matched with test specimen outside surface.
6. as claimed in claim 4 for the false triaxial creepage device under Geotechnical Engineering Even round pressure, it is characterized in that, described first component is provided with the hole passed for sheet flexible material part.
7. as claimed in claim 1 for the false triaxial creepage device under Geotechnical Engineering Even round pressure, it is characterized in that, described charger comprises loading pallet, load center on tray upper surface and be provided with loading pallet engaging lug, described engaging lug is provided with axis hole, the centre position of sheet-like flexible material pieces one end is connected on described engaging lug by rotating shaft through axis hole, load pallet and sheet-like flexible material pieces central shaft hinged, force action, in sheet-like flexible material pieces center, prevents test specimen to be subject to bias voltage.
8. as claimed in claim 1 for the false triaxial creepage device under Geotechnical Engineering Even round pressure, it is characterized in that, described augmentor is lifting jack.
9., for a method of operating for the false triaxial creepage device under Geotechnical Engineering Even round pressure, it is characterized in that, comprising:
(1) creep device is placed in testing table edge, and device pedestal is fixed on testing table;
(2) rubber ring is wrapped creep test specimen, lie against on testing table, by fixture, sheet-like flexible material pieces one end of known features is fixed on fixture, after wrapping test specimen, sheet-like flexible material pieces end is hung down, and loading pallet is fixed on sheet-like flexible material pieces end;
(3) creep confined pressure is set, and conversion corresponding loading counterweight weight, counterweight is placed on and loads in pallet;
(4) contrast test is set, the counterweight of equivalent weight is directly acted on the sheet-like flexible material pieces of same length, offset the error that the creep of sheet-like flexible material pieces self brings;
(5) after confined pressure loads and stablizes, applying axial compression by lifting jack, by controlling the reading of sensor, controlling the constant of axial compression;
(6) initial position of jack end and sheet-like flexible material pieces end is recorded, again record is carried out every the corresponding time, by the drop-out value of sheet-like flexible material pieces end, calculate the change in radius of test specimen, draw hoop strain, obtain test specimen axial strain by record axial displacement, finally obtain the creep characteristic curve of test specimen;
(7) change circumferential pressure and axle pressure value, repeat above operation, obtain the creep properties of test specimen under different acting force.
CN201310598127.3A 2013-11-22 2013-11-22 Fake triaxial creeping device and method for geotechnical engineering under uniform confining pressure CN103604697B (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11211637A (en) * 1998-01-27 1999-08-06 Mitsubishi Heavy Ind Ltd Method for testing triaxial creep rupture
KR20040045136A (en) * 2002-11-22 2004-06-01 삼성물산 주식회사 Triaxial compressive tester
JP2004205469A (en) * 2002-12-20 2004-07-22 Tomoyoshi Nishimura Humidity-controlled triaxial compression tester
CN2795844Y (en) * 2004-08-10 2006-07-12 中国科学院寒区旱区环境与工程研究所 Low temperature high pressure three shaft creep test instrument
CN102937551A (en) * 2012-11-13 2013-02-20 河海大学 Rock triaxial test device based on capacitance imaging
CN103149101A (en) * 2013-02-28 2013-06-12 西安理工大学 Multifunctional triaxial creep testing machine with soil body pulling, pressing, twisting and shearing functions
CN103196746A (en) * 2013-03-21 2013-07-10 山东大学 Novel device for pseudo tri-axial creep of rock and earth engineering test block and using method of device
CN103344501A (en) * 2013-07-20 2013-10-09 中国水利水电科学研究院 Large geotechnical triaxial creep test system
CN203561557U (en) * 2013-11-22 2014-04-23 山东大学 False triaxial creeping device under uniform confining pressure for geotechnical engineering

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11211637A (en) * 1998-01-27 1999-08-06 Mitsubishi Heavy Ind Ltd Method for testing triaxial creep rupture
KR20040045136A (en) * 2002-11-22 2004-06-01 삼성물산 주식회사 Triaxial compressive tester
JP2004205469A (en) * 2002-12-20 2004-07-22 Tomoyoshi Nishimura Humidity-controlled triaxial compression tester
CN2795844Y (en) * 2004-08-10 2006-07-12 中国科学院寒区旱区环境与工程研究所 Low temperature high pressure three shaft creep test instrument
CN102937551A (en) * 2012-11-13 2013-02-20 河海大学 Rock triaxial test device based on capacitance imaging
CN103149101A (en) * 2013-02-28 2013-06-12 西安理工大学 Multifunctional triaxial creep testing machine with soil body pulling, pressing, twisting and shearing functions
CN103196746A (en) * 2013-03-21 2013-07-10 山东大学 Novel device for pseudo tri-axial creep of rock and earth engineering test block and using method of device
CN103344501A (en) * 2013-07-20 2013-10-09 中国水利水电科学研究院 Large geotechnical triaxial creep test system
CN203561557U (en) * 2013-11-22 2014-04-23 山东大学 False triaxial creeping device under uniform confining pressure for geotechnical engineering

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Experimental investigation of creep behavior of salt rock;Chunhe Yang, et al.;《International Journal of Rock Mechanics and Mining Sciences》;19991231;第36卷;第233-242页 *
Study on tri-axial creep experiment and constitutive relation of different rock salt;Huabin Zhang et al.;《Safety Science》;20121231;第50卷;第801-805页 *
三轴剪切作用下体积变化对岩石其他力学性质影响;王者超;《固体力学学报》;20131031;第34卷(第5期);第527-535页 *
大庆泥岩的三轴蠕变试验研究;周祖辉 等;《华东石油学院学报》;19851231(第4期);第22-30页 *

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