CN107966345A - The making mould of three-dimensional fracture strata model sample - Google Patents
The making mould of three-dimensional fracture strata model sample Download PDFInfo
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- CN107966345A CN107966345A CN201810035028.7A CN201810035028A CN107966345A CN 107966345 A CN107966345 A CN 107966345A CN 201810035028 A CN201810035028 A CN 201810035028A CN 107966345 A CN107966345 A CN 107966345A
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- crack
- sliding slot
- frame body
- outer frame
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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Abstract
The invention discloses a kind of making mould of three-dimensional fracture strata model sample, including base, outer frame body, lateral crack adjuster, circular sliding slot, protractor, rectangle sliding slot and vertical crack form piece, the upper end of base is fixed with outer frame body by inserting mode, the sidepiece of outer frame body is fixed with lateral crack adjuster, inside offers forming cavity, the upper shed edge of forming cavity is fixed with circular sliding slot, the lower section of circular sliding slot is equipped with some rectangle sliding slots, the lower slide of rectangle sliding slot is connected with vertical crack and forms piece, upper end is by driving bull stick to be connected with protractor；Lateral crack adjuster includes hemispherical housing, fixed charge method end plate and side crack and forms component.The present invention is adjusted by upper surface and lateral crack, more can really reflect that Three-dimensional Rock crevice space is distributed, including the width of three-dimensional fracture, spacing, inclination angle and perforation degree；It is simple and quick, it can repeatedly use, improve modelling efficiency.
Description
Technical field
The present invention relates to crack rock model sample manufacture technology field, more particularly to a kind of three-dimensional fracture strata model to try
The making mould of sample.
Background technology
The important difference of rock and rock mass is exactly to contain fissure-plane in rock mass, and fissure-plane destroys the integrality of rock itself
And continuity, the intensity of rock mass will be far below rock strength.Since rock mass is the product of earth history effect, and by the later stage
Crustal movement and the refigure of outside of the earth agent, have certain rock composition and Fracture Networks, therefore, rock mass is not equal
Matter, but heterogeneous, anisotropy and discrete complex structure body, the mechanical property of discontinuous face usually determine entirely
The mechanical characteristic of rock mass.Further, since the geometry of fissure-plane and the difference of Spatial Distribution Pattern, result in the strong of rock mass
Degree, there are obvious otherness for deformation characteristic.
Enter high speed development with the infrastructure construction in the fields such as China's water power, traffic, railway, the energy, mine, military project
, there are large quantities of Important Projects large-scale, geological conditions is extremely complex in phase, and the mechanical behavior of discontinuous face is in certain journey
The security of these engineering rock mass structures is determined on degree.Therefore, there is an urgent need for carry out, strengthen relevant crack Mechanical property and its
The basic research work of failure mechanism.Test method is the important hand of current characteristics of deformation and strength of the research containing crack rock
Section.But in view of the complexity and sampling difficulty of natural rock sample structure, general is difficult to it by real rock sample
Mechanical deformation characteristic studied with failure law, scholars generally use makes model containing crack rock and substitutes natural rock
Stone sample.
The existing sample of model containing crack rock is in the production process in place of Shortcomings, when its it is general consider Single Fracture or
The two-dimentional crack of the simple spatial shape of person, the research for three dimensions crack is less, generally can not take into full account the sky in crack
Between form, consider the trend, tendency, inclination angle in crack；Second, mold shape is single, it is not easy to remove and assembled.
The content of the invention
It is an object of the invention to overcome the above-mentioned problems in the prior art, there is provided a kind of three-dimensional fracture strata model
The making mould of sample.
To realize above-mentioned technical purpose and the technique effect, the present invention is to be achieved through the following technical solutions：
A kind of making mould of three-dimensional fracture strata model sample, including base, outer frame body, lateral crack adjuster, circle
Shape sliding slot, protractor, rectangle sliding slot and vertical crack form piece, and the upper end of the base is fixed with outline border by inserting mode
Body, the sidepiece of the outer frame body are fixed with lateral crack adjuster, and inside offers forming cavity, the upper shed side of the forming cavity
Circular sliding slot is fixed with edge, the lower section of the circle sliding slot is equipped with some rectangle sliding slots, the lower end of each rectangle sliding slot
Equipped with cracking, and place of cracking slidably connects T-shaped vertical crack and forms piece, and the upper end of each rectangle sliding slot passes through drive
Turn bar is connected with protractor, and the driving bull stick is passed through from the annular groove of circular sliding slot, and the outside diameter of the protractor is more than
The width of annular groove；
The lateral crack adjuster includes the hemispherical housing with inner cavity, equal at the outer ledge of the hemispherical housing
Some fixed charge method end plates are furnished with, fixing screws fix itself and outer frame body through fixed charge method end plate, in the inner cavity of the hemispherical housing
It is equiped with side crack and forms component, the side crack forms component and forms piece, positioning bull stick, vertical side by supporting block, side crack
Formed to tilt adjustment gear and horizontal direction adjustment gear, the side crack that is fixedly arranged at the front end with of the supporting block forms piece, the branch
Bracer both sides are symmetrically fixed with the vertical direction tilt adjustment gear with positioning bull stick, and the side crack forms on piece and is arranged with water
Put down to adjustment gear, offer the rectangular through-holes for forming piece easy to side crack and sliding in the horizontal direction adjustment gear, described half
The sidepiece of outer frame body offers the passage that piece activity is formed easy to side crack where spherical shell, and passage is connected with forming cavity
It is logical.
Preferably, in the making mould of above-mentioned three-dimensional fracture strata model sample, the upper end of the base offers jack,
The lower end of the outer frame body is fixed with the plug coordinated with jack.
Preferably, in the making mould of above-mentioned three-dimensional fracture strata model sample, the outer frame body generally square column
Structure.
Preferably, in the making mould of above-mentioned three-dimensional fracture strata model sample, the cross section of the forming cavity is circle
It is or square.
Preferably, in the making mould of above-mentioned three-dimensional fracture strata model sample, the front end of the supporting block is equipped with card slot,
The side crack sheet of rear end of shape is equipped with clamp, and the cutting ferrule can be from being laterally caught in card slot.
Preferably, in the making mould of above-mentioned three-dimensional fracture strata model sample, the vertical crack forms piece, side crack
It is all stainless steel substrates to form piece.
The beneficial effects of the invention are as follows：
1st, adjusted by upper surface and lateral crack, more can really reflect that Three-dimensional Rock crevice space is distributed,
Width, spacing, inclination angle and perforation degree including three-dimensional fracture.
2nd, different sizes, different shape (cuboid, square and cylinder) mould can be made.
3rd, it is simple and quick, it can repeatedly use, improve modelling efficiency.
Certainly, implement any of the products of the present invention and it is not absolutely required to all advantages for reaching the above at the same time.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, embodiment will be described below required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is base, the structure diagram of outer frame body in the present invention；
Fig. 3 is the structure diagram of lateral crack adjuster in the present invention；
Fig. 4 is circular sliding slot, protractor, rectangle sliding slot and the sheet of position distribution signal of vertical crack shape in the present invention
Figure；
Fig. 5 is protractor, rectangle sliding slot and the vertical sheet of structure diagram of crack shape in the present invention.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other without creative efforts
Embodiment, belongs to the scope of protection of the invention.
Please refer to Fig.1 shown in -5, the present embodiment is a kind of making mould of three-dimensional fracture strata model sample, including base
1st, outer frame body 2, lateral crack adjuster 3, circular sliding slot 4, protractor 8, rectangle sliding slot 5 and vertical crack form piece 6.Base 1
Upper end outer frame body 2 is fixed with by inserting mode, the sidepiece of outer frame body 2 is fixed with lateral crack adjuster 3, and inside offers
Forming cavity 9.The upper shed edge of forming cavity 9 is fixed with circular sliding slot 4, and circular sliding slot 4 is an integral structure or piecewise combination
Formula structure, is connected by grafting or bolt fixed mode with outer frame body 2.The lower section of circular sliding slot 4 is equipped with some rectangle sliding slots 5.
The lower end of each rectangle sliding slot 5, which is equipped with, cracks, and place of cracking slidably connects T-shaped vertical crack and forms piece 6.Each rectangle
The upper end of sliding slot 5 is by driving bull stick 7 to be connected with protractor 8, and driving bull stick 7 is passed through from the annular groove of circular sliding slot 4, angulation
The outside diameter of device 8 is more than the width of annular groove, that is, is blocked above it, as suspension strut portion.
Lateral crack adjuster 3 includes the hemispherical housing 301 with inner cavity, equal at the outer ledge of hemispherical housing 301
Some fixed charge method end plates 302 are furnished with, fixing screws fix itself and outer frame body 2 through fixed charge method end plate 302.Hemispherical housing 301
Side crack is equiped with inner cavity and forms component.Side crack forms component and forms piece 304, positioning bull stick by supporting block 303, side crack
305th, vertical direction tilt adjustment gear 306 and horizontal direction adjustment gear 307 are formed, and the side that is fixedly arranged at the front end with of supporting block 303 is split
Gap forms piece 304, and the front end of supporting block 303 is equipped with card slot, and the rear end of side crack formation piece 304 is equipped with clamp, and clamp can be from
Laterally it is caught in card slot, departs from order to prevent, clamp is arranged to T-type structure.303 both sides of supporting block are symmetrically fixed with band positioning
The vertical direction tilt adjustment gear 306 of bull stick 305, side crack form on piece 304 and are arranged with horizontal direction adjustment gear 307, water
The rectangular through-holes for being offered into adjustment gear 307 and forming piece 304 easy to side crack and slide are put down, the hemispherical institute of housing 301 is outside
The sidepiece of framework 2 offers the passage 10 that the activity of piece 304 is formed easy to side crack, and passage 10 is connected with forming cavity 9.
The upper end of base 1 offers jack, and the lower end of outer frame body 2 is fixed with the plug coordinated with jack.Outer frame body 2 is overall
For square column structure, the cross section of forming cavity 9 is circular or square.Vertical crack forms piece 6, side crack forms piece 304 all
For stainless steel substrates.
The concrete operation step of the present embodiment is as follows：
(1) according to the requirement of experiment, choose appropriate size outer frame body 2, circular sliding slot 4, vertical crack formed piece 6 and
Side crack forms piece 304.Outer frame body 2 is fixed on base 1, then circular sliding slot 4 is bolted on outer frame body 2
Portion.
(2) according to the requirement of experiment, the vertical crack chosen formation piece 6 is placed on to the rectangle sliding slot 5 for connecting steel disc
It is interior, it is upward through from circular 4 lower part of sliding slot, driving bull stick 7 and circular protractor 8 is fixedly connected by bolt on top, will
Metal finger is zeroed, and whole protractor 8 and vertical crack so far are formed piece 6 is placed in circular sliding slot 4, adjusts steel on request
Angle, position and the group of piece away from.
(3) experimental research, 2 side wall of outer frame body is fixed on by lateral crack adjuster 3 by 4 bolts.Choose
Appropriate side crack forms piece 304, is placed into lateral angles adjuster 3, adjusts on request and vertically rotates and horizontally rotate, Gu
Determine steel disc inclination angle, position, perforation situation and group away from.
(4) after the completion of assembled, start to pour mould and mechanical pudding according to test requirements document.
(5) when material is pre-hardening, first take out vertical crack and form piece 6 and protractor 8, further take out side crack and form piece 304,
Form three dimensions crack.Treat first to remove upper circular sliding slot 4 after final set, then remove lateral crack adjuster 3, finally take
Go out outer frame body 2 and complete the demoulding and sample making, be ready for the physico-mechanical properties experimental study of next step rock mass.
(6) each component of mould is cleaned, so that next time is reused.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
At least one implementation of the present invention is contained in reference to the embodiment or example particular features, structures, materials, or characteristics described
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can close in any one or more embodiments or example
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help and illustrates the present invention.Preferred embodiment is not detailed
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.This specification is chosen and specifically describes these embodiments, is in order to preferably explain the present invention
Principle and practical application so that skilled artisan can be best understood by and utilize the present invention.The present invention is only
Limited by claims and its four corner and equivalent.
Claims (6)
- A kind of 1. making mould of three-dimensional fracture strata model sample, it is characterised in that：Including base, outer frame body, lateral crack Adjuster, circular sliding slot, protractor, rectangle sliding slot and vertical crack form piece, and the upper end of the base is consolidated by inserting mode Surely there is outer frame body, the sidepiece of the outer frame body is fixed with lateral crack adjuster, and inside offers forming cavity, the forming cavity Upper shed edge is fixed with circular sliding slot, and the lower section of the circle sliding slot is equipped with some rectangle sliding slots, and each rectangle is slided The lower end of groove, which is equipped with, cracks, and place of cracking slidably connects T-shaped vertical crack and forms piece, and each the rectangle sliding slot is upper End is by driving bull stick to be connected with protractor, and the driving bull stick is passed through from the annular groove of circular sliding slot, the protractor Outside diameter is more than the width of annular groove；The lateral crack adjuster includes the hemispherical housing with inner cavity, is evenly equipped with the outer ledge of the hemispherical housing Some fixed charge method end plates, fixing screws fix itself and outer frame body through fixed charge method end plate, are installed in the inner cavity of the hemispherical housing There is side crack to form component, the side crack formation component forms piece, positioning bull stick, vertical direction by supporting block, side crack and inclines Oblique adjustment gear and horizontal direction adjustment gear are formed, and the side crack that is fixedly arranged at the front end with of the supporting block forms piece, the supporting block Both sides are symmetrically fixed with the vertical direction tilt adjustment gear with positioning bull stick, and the side crack forms on piece and is arranged with horizontal direction Adjustment gear, the rectangular through-holes for forming piece easy to side crack and sliding are offered in the horizontal direction adjustment gear, described hemispherical The sidepiece of outer frame body offers the passage that piece activity is formed easy to side crack where housing, and passage is connected with forming cavity.
- 2. the making mould of three-dimensional fracture strata model sample according to claim 1, it is characterised in that：The base Upper end offers jack, and the lower end of the outer frame body is fixed with the plug coordinated with jack.
- 3. the making mould of three-dimensional fracture strata model sample according to claim 1, it is characterised in that：The outer frame body Generally square column structure.
- 4. the making mould of three-dimensional fracture strata model sample according to claim 3, it is characterised in that：The forming cavity Cross section to be circular or square.
- 5. the making mould of three-dimensional fracture strata model sample according to claim 1, it is characterised in that：The supporting block Front end be equipped with card slot, the side crack sheet of rear end of shape is equipped with clamp, and the cutting ferrule can be from being laterally caught in card slot.
- 6. the making mould of three-dimensional fracture strata model sample according to claim 1, it is characterised in that：It is described vertically to split Gap forms piece, side crack formation piece is all stainless steel substrates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810035028.7A CN107966345A (en) | 2018-01-15 | 2018-01-15 | The making mould of three-dimensional fracture strata model sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810035028.7A CN107966345A (en) | 2018-01-15 | 2018-01-15 | The making mould of three-dimensional fracture strata model sample |
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| Publication Number | Publication Date |
|---|---|
| CN107966345A true CN107966345A (en) | 2018-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810035028.7A Pending CN107966345A (en) | 2018-01-15 | 2018-01-15 | The making mould of three-dimensional fracture strata model sample |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110376039A (en) * | 2019-08-05 | 2019-10-25 | 长沙理工大学 | A kind of standard class rock sample prefabricated crack producing device and production method |
| CN110470522A (en) * | 2019-09-19 | 2019-11-19 | 东北大学 | A kind of method of prefabricated different water cut saturation degree rock mass of fracture network sample |
| CN112683622A (en) * | 2020-12-29 | 2021-04-20 | 防灾科技学院 | Physical simulation system for prefabricating rock mass with different strike fracture surfaces |
| CN113203617A (en) * | 2021-06-23 | 2021-08-03 | 重庆大学 | Fractured rock mass test piece sample preparation mold and sample preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519767A (en) * | 2011-12-16 | 2012-06-27 | 武汉大学 | Mould for manufacturing fissure surface of rock like test block |
| CN104990772A (en) * | 2014-08-12 | 2015-10-21 | 中国石油大学(北京) | Base apparatus for prefabricating crack having any inclination angle in artificial specimen |
| CN105628463A (en) * | 2015-03-09 | 2016-06-01 | 绍兴文理学院 | Sample preparation mold for fractured rock mass model sample |
| CN105738180A (en) * | 2016-05-03 | 2016-07-06 | 中国石油大学(华东) | Mold for manufacturing fracture-containing rock sample with anchor rod |
| CN105806687A (en) * | 2016-03-04 | 2016-07-27 | 中国石油大学(华东) | Mould for manufacturing rock block with adjustable angle and width of fissure surface |
| CN105823663A (en) * | 2016-05-11 | 2016-08-03 | 中国海洋大学 | Mold for manufacturing hemi-discoid rock-like specimen with fracture surface and manufacturing method |
| CN106124272A (en) * | 2016-08-02 | 2016-11-16 | 中国科学院武汉岩土力学研究所 | A kind of analog material rock mass sample Among Intermittent Joints is accurately positioned producing device |
| CN207964398U (en) * | 2018-01-15 | 2018-10-12 | 吉林大学 | The making mold of three-dimensional fracture strata model sample |
-
2018
- 2018-01-15 CN CN201810035028.7A patent/CN107966345A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519767A (en) * | 2011-12-16 | 2012-06-27 | 武汉大学 | Mould for manufacturing fissure surface of rock like test block |
| CN104990772A (en) * | 2014-08-12 | 2015-10-21 | 中国石油大学(北京) | Base apparatus for prefabricating crack having any inclination angle in artificial specimen |
| CN105628463A (en) * | 2015-03-09 | 2016-06-01 | 绍兴文理学院 | Sample preparation mold for fractured rock mass model sample |
| CN105806687A (en) * | 2016-03-04 | 2016-07-27 | 中国石油大学(华东) | Mould for manufacturing rock block with adjustable angle and width of fissure surface |
| CN105738180A (en) * | 2016-05-03 | 2016-07-06 | 中国石油大学(华东) | Mold for manufacturing fracture-containing rock sample with anchor rod |
| CN105823663A (en) * | 2016-05-11 | 2016-08-03 | 中国海洋大学 | Mold for manufacturing hemi-discoid rock-like specimen with fracture surface and manufacturing method |
| CN106124272A (en) * | 2016-08-02 | 2016-11-16 | 中国科学院武汉岩土力学研究所 | A kind of analog material rock mass sample Among Intermittent Joints is accurately positioned producing device |
| CN207964398U (en) * | 2018-01-15 | 2018-10-12 | 吉林大学 | The making mold of three-dimensional fracture strata model sample |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110376039A (en) * | 2019-08-05 | 2019-10-25 | 长沙理工大学 | A kind of standard class rock sample prefabricated crack producing device and production method |
| CN110376039B (en) * | 2019-08-05 | 2024-02-02 | 长沙理工大学 | Device and method for manufacturing prefabricated cracks of standard rock-like sample |
| CN110470522A (en) * | 2019-09-19 | 2019-11-19 | 东北大学 | A kind of method of prefabricated different water cut saturation degree rock mass of fracture network sample |
| CN112683622A (en) * | 2020-12-29 | 2021-04-20 | 防灾科技学院 | Physical simulation system for prefabricating rock mass with different strike fracture surfaces |
| CN113203617A (en) * | 2021-06-23 | 2021-08-03 | 重庆大学 | Fractured rock mass test piece sample preparation mold and sample preparation method thereof |
| CN113203617B (en) * | 2021-06-23 | 2024-05-24 | 重庆大学 | Sample preparation mold and sample preparation method for fractured rock mass test piece |
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