CN106053245A - Shearing device for mechanical tests of hydrate-containing sediments - Google Patents
Shearing device for mechanical tests of hydrate-containing sediments Download PDFInfo
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- CN106053245A CN106053245A CN201610564883.8A CN201610564883A CN106053245A CN 106053245 A CN106053245 A CN 106053245A CN 201610564883 A CN201610564883 A CN 201610564883A CN 106053245 A CN106053245 A CN 106053245A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/023—Pressure
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a shearing device for mechanical tests of hydrate-containing sediments. The shearing device comprises a machine frame and a shearing box body, wherein the shearing box body comprises a first box body, a second box body and a box cover which are in closed connection so as to form a closed chamber for generating the hydrate-containing sediments, a water inlet hole and an air inlet hole are formed in the top of the shearing box body, a water and air discharging hole is formed in the bottom of the shearing box body, and a temperature sensor hole and a pressure sensor hole are also formed in the shearing box body. The shearing device not only is a reaction container for the generation of hydrate-containing samples but also is a shearing box for performing consolidation/compression and direct shearing tests on the samples, has the advantages of integration of assembled instruments and experiment step subdivision, is used for carrying out horizontal consolidation/compression tests and vertical direct shearing tests, which are different from conventional direct shearing apparatuses, especially suitable for core samples with large hydrate stability regions, and has wide purposes in the field of mechanical researches of hydrates.
Description
Technical field
The present invention relates to containing hydrate sediment field tests, be specifically related to a kind of for surveying containing hydrate sediment mechanics
The shear of examination.
Background technology
Gas hydrates (abbreviation hydrate) are a kind of unconventional solid compounds matter, and it is typically by hydrone envelope
Gas molecule forms, and mainly composes, at nature, areas such as being stored in the depth of water edge of continental shelf, ocean more than 300m and continent frozen soil layer
In.The energy density of gas hydrates is the highest, and up to about 164 times, the conservative estimation whole world there are about 18.8 trillion tons of organic carbons
Being stored in the form of hydrates in nature (Clayton et al., 2005), thus it is considered the mankind has huge 21 century
The abrasive sustainable novel energy material of DEVELOPMENT PROSPECT, but, under different condition, reserves and the distribution situation of hydrate differ
Very big, particularly ocean water polymer system, research shows only those high fluid neuron network flux and the leakage type water of acutely migration
Polymeric region just has extraction value (Tr é hu et al., 2006), this explanation sediment properties be affect gas hydrate synthesis with
The key factor assembled.
Nature hydrate is assembled by geological structure and deposition characteristics, storage has a significant impact, many research worker also phases
Continuing and carry out sediment properties to gas hydrate synthesis, the research work of cementing aspect, Sava and Hardage (2006) proposes deep
Hydrate and four kinds of cementing patterns of skeleton under water environment, Jain and Juanes (2008) simulates from granule stream collision angle
The lower gas hydrate synthesis of unsaturation flowing and saturation and deposit hole thereof enter the relation between threshold pressure, domestic put into
Peaces etc. (2012) analyze containing hydrate formation hydrostatics character, Feng et al. (2011), Wei Houzhen etc. from point of view of seepage flow
(2011) the hydrate triaxial apparatus built is utilized to test the stress-strain behavior of hydrate and gas hydrate synthesis to sand intensity
Deng impact, it is proposed that consider damage containing hydrate sediment constitutive equation, these research work are greatly promoted hydration
The theoretic knowledge that thing is distributed in deposit and assembles.
Owing to exploitation hydrate reservoir relating to hole collapse and the problem of corresponding stratum strength and deformation, and nature
The deposit unstabilitys that middle decomposition of hydrate causes etc. are studied, and industry and scientific circles need to obtain more accurately more intuitively containing hydrate
The data of the such as shearing mechanical property of shearing strength, cohesive strength, angle of friction etc. of deposit and Changing Pattern, so tradition
Geotechnological class staight scissors instrument be put into the visual field of hydrate mechanics study.What in nature, tax was deposited is general containing hydrate sediment
It is by deposit skeleton-gentle four phase compositions of hydrate-water, along with such deposit of difference of each phase component can show from bullet
Plasticity, to the mechanical characteristics of rheological characteristic, thus needs used direct shear apparatus except completing traditional consolidation and cut test soon
Outward, moreover it is possible to carry out the slow shear creep test under draining/exhaust situation, additionally due to the unstability of hydrate, sink containing hydrate
Long-pending thing sample directly cannot carry out shearing test, in order to obtain accurate hemihydrate content on traditional geotechnological class staight scissors instrument
With load, the relation of deformation, in-situ mechanical test is prepreerence scheme, and in order to realize the two function, gas hydrate synthesis is anti-
Answer still must consider with shear box.
Summary of the invention
In order to solve the problems referred to above, the invention provides a kind of integrated design for containing hydrate sediment mechanics survey
The shear of examination, can either realize, containing the generation in shear box body of the hydrate sediment sample, being capable of again this life
The test carrying out the mechanical properties such as in-situ consolidation compression and direct shearing containing hydrate sediment sample become.
For achieving the above object, the technical scheme is that
A kind of for the shear containing hydrate sediment mechanical test, including frame and shearing box body, described shearing
Box body includes the first box body being fixed on frame side and the second box body that can move up and down relative to the first box body, described the
Two box bodys are internally provided with horizontally movable lid, described first box body, the second box body and box away from one end of the first box body
Airtight connection between lid, is formed for generating the airtight chamber containing hydrate sediment, and the top of described shearing box body is provided with
Inlet opening and air inlet, the bottom of described shearing box body is provided with drainage pore, described shearing box body is additionally provided with temperature
Gauge hole and pressure transducer hole.The airtight chamber of this shearing box body is the generation container containing hydrate sediment sample, box
The sample that the horizontal movement of lid is capable of generating consolidates/compression verification, and the up and down motion of the second box body is capable of
The sample generated is carried out vertical directly shearing test.
Further, it is additionally provided with preformed hole bottom described shearing box body.Preformed hole, as standby hole, occurs in other holes
It is used for during problem replacing it to operate.
Further, described frame also includes fixed support and travel(l)ing rest, described first box body by fixed support with
Frame is fixing to be connected, and described second box body is flexibly connected with frame by travel(l)ing rest.
Further, the top of described second box body is connected with the first connecting rod being furnished with vertical displacement sensor, and described
The bottom of two box bodys is connected with the second connecting rod being furnished with vertical displacement sensor, and the outside of described lid passes with being furnished with horizontal displacement
The third connecting rod of sensor connects, and the other end of described first connecting rod, second connecting rod and third connecting rod is connected with power set.Above-mentioned
Power set can use conventional single cylinder constant voltage constant speed pump, it is provided that the load required for test and speed.
Further, the bottom of described frame is provided with roller.By arranging roller, taking of this shear can be improved
Band.
The present invention is used for the shear containing hydrate sediment mechanical test, is containing hydrate sediment sample
Reaction vessel, is again for the hydrate sample generated horizontal consolidation/compression in situ and the shear box of vertical direct shearing.Examination
When testing, to the water inlet of this shearing box body and air inlet after filling deposit sample, airtight after regulate the temperature and pressure of surrounding again, be allowed to accord with
Close the condition of gas hydrate synthesis, open drainage QI KOU after treating to generate containing hydrate sediment sample, discharge shearing box body
In pressure and possible superfluous water and gas, this sample can be carried out after standing a period of time horizontal consolidation/compression with
Vertically cut/slow shear creep test soon.The shear of the present invention assembles instrument integrated except having and tests the excellent of substepization
Point, additionally it is possible to carry out the horizontal consolidation/compression verification different from conventional direct shear apparatus and the test of vertical direct shearing, be particularly suitable for water
The core sample that compound stability region is big, has in hydrate mechanics study field and has been widely used.
Accompanying drawing explanation
Fig. 1 is the shear structural representation of the present invention；
Fig. 2 is that the shear of the present invention is in consolidation compressive state schematic diagram；
Fig. 3 is that the shear of the present invention is in upwards shearing condition schematic diagram；
Fig. 4 is that the shear of the present invention is in downward shearing condition schematic diagram；
Description of reference numerals: 1-frame；2-shears box body；3-contains hydrate sediment；4-inlet opening；5-air inlet；6-
Drainage pore；7-temperature sensor hole；8-pressure transducer hole；9-preformed hole；10-fixed support；11-travel(l)ing rest；12-
First connecting rod；13-second connecting rod；14-third connecting rod；15-roller；21-the first box body；22-the second box body；221-lid.
Detailed description of the invention
With detailed description of the invention, present disclosure is described in further details below in conjunction with the accompanying drawings.
Embodiment:
As it is shown in figure 1, it is a kind of for the shear containing hydrate sediment mechanical test, including frame 1 and shear box
Body 2, described shearing box body 2 includes the first box body 21 being fixed on frame 1 side and can move up and down relative to the first box body 21
The second box body 22, be internally provided with horizontally movable lid at described second box body 22 away from one end of the first box body 21
221, airtight connection between described first box body the 21, second box body 22 and lid 221, formed for generating containing hydrate sediment
The airtight chamber of 3, the top of described shearing box body 2 is provided with inlet opening 4 and air inlet 5, and the bottom of described shearing box body 2 is arranged
There is drainage pore 6, described shearing box body 2 is additionally provided with temperature sensor hole 7 and pressure transducer hole 8, described shear box
Preformed hole 9 it is additionally provided with bottom body 2.
Wherein, described frame 1 includes fixed support 10 and travel(l)ing rest 11, and described first box body 21 is by fixed support 10
Fixing with frame 1 being connected, described second box body 22 is flexibly connected with frame 1 by travel(l)ing rest 11, described first box body 21 and
It is respectively arranged with dynamic seal ring between second box body 22, between the second box body 22 and lid 221, described travel(l)ing rest 11 is arranged
There is the pressure-regulating device (not shown) making the second box body 22 compress the first box body 21.
Wherein, the top of described second box body 22 is connected with the first connecting rod 12 being furnished with vertical displacement sensor, and described
The bottom of two box bodys 22 is connected with the second connecting rod 13 being furnished with vertical displacement sensor, the outside of described lid 221 be furnished with water
The third connecting rod 14 of prosposition displacement sensor connects, the other end of described first connecting rod 12, second connecting rod 13 and third connecting rod 14 with
Power set (not shown) connects, and power set can use single cylinder constant voltage constant speed pump, it is provided that compression concretion and shearing institute
The load needed and speed, described power set are also mounted in frame 1, and the bottom of described frame 1 is provided with roller 15.
The shearing box body 2 containing hydrate sediment mechanical test that is used for of the present embodiment uses 316L rustless steel, designs
The most pressure for 20MPa, design work temperature range is-20～70 DEG C, and design shape a size of 120 × 60 × 60mm is (long × wide
× high), designing vertical maximum can bearing load be 100KN, and design level maximum drilling depth is 120mm, the vertical maximum drilling depth of design
For 60mm, power set use single cylinder constant voltage constant speed pump, design vertical compression and shear rate is 0.0024-1.2mm/min, its
In the first box body 21 be positioned at the left side of frame 1, the second box body 22 is positioned at the right side of frame 1, and corresponding lid 221 is positioned at the second box
The right-hand member of body 22, referring to Fig. 2 to Fig. 4 to the present invention for the use of shear containing hydrate sediment mechanical test
It is described in detail below with test process:
A () uses high pressure nitrogen inspection to shear the air-tightness of box body 2: shear the sealing feelings of box body 2 before first checking for gas injection
Condition, air inlet 5 is connected with high-pressure nitrogen bottle and (can connect if necessary again by the high-voltage-resistant anti-corrosion pipeline then passing through experiment
Enter booster pump), pipeline is provided with high pressure stop valve, is then shut off remaining hole, opens valve and injects high pressure nitrogen extremely
15MPa, closes valve after static about 2 hours, owing to temperature sensor and pressure transducer have been connected into computer by cable, permissible
By the temperature, pressure situation of change of 2 in corresponding computer monitoring software display shear box body, if finding, pressure slowly declines, then
Use suds to investigate the interface that may leak gas one by one, to the last determine till not havinging gas leak phenomenon；
B () makes containing CO2Hydrate sediment sample: open the lid 221, deposits fine sand by the consolidation of certain particle diameter and puts into
Shear in box body 2, turn off lid 221, inject precalculated deionized water by water inlet 4, close water inlet 4, logical
Cross air inlet 5 and be passed through high pressure CO2Gas, closes air inlet 4 when pressure transducer shows to 8Mpa pressure, uses large-scale stepping into
The cooling systems such as formula high-low temperature test chamber able to programme make the temperature of shear be down to 1 DEG C and settle out, then observe temperature at any time
Degree sensor and the curvilinear motion situation of pressure transducer, can judge the generating state of hydrate, accordingly when determining this CO2Hydration
Sediment specimen reaction completely after, then stand half an hour, then reduce temperature to 0.1 DEG C, in 2min, quickly open drainage
Pore 6 bleeds off possible unnecessary water or gas, is then switched off drainage pore 6, utilizes single cylinder constant voltage constant speed pump to apply to lid 221
Thrust, keeps the confined pressure of about 1.5-2MPa in making shearing box body 2, allow CO2Hydrate is stable, the change of recording level displacement transducer
Change data and curve, note that be intended to be exhausted/draining under consolidation/shearing experiment then can put into accordingly in box body
Pottery clay plates or permeable stone；
C () contains CO2The horizontal consolidation of hydrate sediment/compression property test: after step (b) completes, start single cylinder
Constant voltage constant speed pump, is divided 5 grades to apply horizontal loading lid 221 left direction by third connecting rod 14, carries out this and contain hydrate sample
Consolidation/compression test, as in figure 2 it is shown, the record delta data of displacement transducer and curve, i.e. can obtain this thermodynamic condition
With under hemihydrate content lateral spacing with axially loaded under the conditions of the relation of sample deformation and load, the relation of deformation and time,
Can get the parameters such as the coefficient of compressibility of sample, modulus of compressibility, compression and the coefficient of consolidation according to the relation curve recorded；
D () contains CO2Hydrate sediment vertical is cut and the mechanical property test such as slow shear creep soon: treat that step (b) completes
After, start single cylinder constant voltage constant speed pump, second connecting rod 13 upwards divide 5 grades to apply normal thrust the second box body 22, make the second box
Body 22 upwards shears movement, as it is shown on figure 3, the delta data of record displacement transducer and curve；Or it is right by first connecting rod 12
Second box body 22 divides downwards 5 grades to apply normal thrust, makes the second box body 22 move to down cut, and as shown in Figure 4, record displacement passes
The delta data of sensor and curve, instruct regulations to carry out experiment according to corresponding centrifugal modeling, if vertical shear rate is
0.0024mm/min then can be considered that slow shear creep is tested, if vertical shear rate is 1.2mm/min, can be considered and cuts test soon,
The relation curves such as the angle of friction and the cohesion that finally can get deposit sample under this thermodynamic condition and hemihydrate content,
And obtain its relevant Shear Strength Index.
The shear of the present invention is used in particular for carrying out the horizontal consolidation/compression verification different from conventional direct shear apparatus and vertical
Direct shearing is tested, and is particularly suitable for the core sample that hydrate stability zone territory is big, has wide in hydrate mechanics study field
General purposes.
Above-described embodiment simply to illustrate that the technology design of the present invention and feature, its objective is to be to allow in this area
Those of ordinary skill will appreciate that present disclosure and implements according to this, can not limit the scope of the invention with this.All
It is change or the modification of the equivalence that the essence according to present invention is made, all should contain within the scope of the present invention.
Claims (5)
1., for the shear containing hydrate sediment mechanical test, including frame (1) and shearing box body (2), it is special
Levy and be: described shearing box body (2) include being fixed on frame (1) side the first box body (21) and can be relative to the first box body
(21) the second box body (22) moved up and down, is internally provided with away from one end of the first box body (21) described second box body (22)
Horizontally movable lid (221), airtight connection between described first box body (21), the second box body (22) and lid (221), shape
Become for generating containing the airtight chamber of hydrate sediment (3), the top of described shearing box body (2) be provided with inlet opening (4) and
Air inlet (5), the bottom of described shearing box body (2) is provided with drainage pore (6), described shearing box body (2) is additionally provided with
Temperature sensor hole (7) and pressure transducer hole (8).
The most according to claim 1 for the shear containing hydrate sediment mechanical test, it is characterised in that described
Shear box body (2) bottom and be additionally provided with preformed hole (9).
The most according to claim 2 for the shear containing hydrate sediment mechanical test, it is characterised in that described
Frame (1) also includes fixed support (10) and travel(l)ing rest (11), and described first box body (21) passes through fixed support (10) and machine
Frame (1) is fixing to be connected, and described second box body (22) is flexibly connected with frame (1) by travel(l)ing rest (11).
4. arbitrary described for the shear containing hydrate sediment mechanical test according to claims 1 to 3, its feature exists
In, the top of described second box body (22) is connected with the first connecting rod (12) being furnished with vertical displacement sensor, described second box body
(22) bottom is connected with the second connecting rod (13) being furnished with vertical displacement sensor, the outside of described lid (221) be furnished with water
The third connecting rod (14) of prosposition displacement sensor connects, described first connecting rod (12), second connecting rod (13) and third connecting rod (14)
The other end is connected with power set.
The most according to claim 4 for the shear containing hydrate sediment mechanical test, it is characterised in that described
The bottom of frame (1) is provided with roller (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610564883.8A CN106053245A (en) | 2016-07-14 | 2016-07-14 | Shearing device for mechanical tests of hydrate-containing sediments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610564883.8A CN106053245A (en) | 2016-07-14 | 2016-07-14 | Shearing device for mechanical tests of hydrate-containing sediments |
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| CN201610564883.8A Pending CN106053245A (en) | 2016-07-14 | 2016-07-14 | Shearing device for mechanical tests of hydrate-containing sediments |
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Cited By (7)
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| CN106950115A (en) * | 2017-04-26 | 2017-07-14 | 成都理工大学 | The full-hole core hydrofracturing ultrasonic detection method of axial stress independent loads |
| CN109599021A (en) * | 2018-11-02 | 2019-04-09 | 广州海洋地质调查局 | A kind of geologic reservoir radial flow simulator |
| CN112129589A (en) * | 2020-09-07 | 2020-12-25 | 中国科学院武汉岩土力学研究所 | Radon gas release amount measuring device and method in rock shearing and breaking process |
| CN112730024A (en) * | 2020-12-07 | 2021-04-30 | 西南交通大学 | Integrated device for testing compression and shearing performance of rock material |
| CN112858018A (en) * | 2021-01-08 | 2021-05-28 | 青岛海洋地质研究所 | Device and method for testing lateral pressure creep of hydrate-containing sediment |
| CN114878358A (en) * | 2022-03-21 | 2022-08-09 | 东北大学 | Filling body-rock interface device and method based on DIC and acoustic emission monitoring |
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