CN106092695A - A kind of rock-like materials structural plane is produced and for the device and method of shearing test - Google Patents
A kind of rock-like materials structural plane is produced and for the device and method of shearing test Download PDFInfo
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- CN106092695A CN106092695A CN201610640170.5A CN201610640170A CN106092695A CN 106092695 A CN106092695 A CN 106092695A CN 201610640170 A CN201610640170 A CN 201610640170A CN 106092695 A CN106092695 A CN 106092695A
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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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- 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
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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Abstract
The present invention relates to a kind of rock-like materials structural plane produce and for the device and method of shearing test.This device includes test specimen manufacturing system, sample system, loading system and data collecting system.The present invention is capable of producing rock-like materials structural plane, and the weak intercalated layer structural plane containing different charges, and can realize the research to this structural plane shear property.
Description
Technical field
The present invention relates to rock structural face and producing and shearing containing weak intercalated layer structural plane, be specifically related to a kind of rocks
Material structure face is produced, shear and method.
Background technology
Rock structural face is the medium generally existed in slope project, dam foundation engineering, mining engineering, and rock mass is internal the most not
Continuous surface affects and determines the physico-mechanical properties of rock mass, and in secondary structural plane, weak intercalated layer is low due to intensity, often shadow
Ring and determine the principal element of physico-mechanical properties of rock mass.In view of the investment of Large Field experiment in situ, the most right
In crack rock research mainly by means of in-house laboratory investigation, obtained the power of weak intercalated layer structural plane by indoor shearing test
Learn character and failure law is a kind of effective method, but this generally requires substantial amounts of test specimen and does the shearing under different condition
Test, and in reality, is difficult to produce abundant rock structural face for test, by artificial manufacture rock-like materials knot
Structure face shearing test understands mechanics and the deformation behaviour thereof of rock structural face, and design and construction thereof for various rock mass engineering projects carry
For important foundation.
Rock mass often contains the weak intercalated layer such as yellow mud, soil, according to the water content meeting of these interlayers of Changes in weather in crack
Changing, the interlayer of different moisture content has large effect to the stability of rock mass, and a lot of engineering accidents are all due to water
Humidification reduces the shearing strength of structural plane and causes, and what this influence was the most quantitative goes description is relatively difficult
's.Further, since the existence in crack can be in the way of changing mechanical property and the rock mass damage of rock mass, and slip casting can increase rock mass
The internal friction angle in crack and cohesive force, thus change the intensity of rock mass.Owing to slip casting can improve the stability on stratum, at the scene
In work progress, slurry injection technique is increasingly widely applied, and in structural plane, the situation of filling and injecting slurry body is consequently increased, so
And, the situation that affects of structural face shear strength is difficult to be quantitative determined by on-the-spot test by the injecting cement paste of filling, so, research Huang
Site operation and construction effect are had certain by the charges such as mud, soil, injecting cement paste by the impact of Shear Strength along Rock Stratum Plane
Meaning.
Shear strength test is divided into non-limiting intensity shearing test and restricted shear strength test.Non-limiting intensity
Shearing test only shear stress on shear surface exists, and does not has direct stress；Restricted intensity shearing test is on shear surface
In addition to shear stress, there is also direct stress.More conventional for restricted intensity shearing test, due to rock sample and base it
Between exist friction, so surveyed shear strength is frictional force sum between rock sample actual shearing intensity and sample and base,
It is therefore desirable to eliminate or reduce the frictional force between sample and base.Structural plane during shearing test, containing charges
In charges be easy to be scattered from test specimen both sides with shear displacemant, affect test and be normally carried out, so to prevent filling
The device that thing is scattered.
Summary of the invention
For technical problem above-mentioned present on prior art, the present invention proposes a kind of rock-like materials structural plane system
Take, shear.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is as follows:
The present invention provides a kind of rock-like materials structural plane to produce and for the device of shearing test, it is characterised in that: bag
Include test specimen manufacturing system, sample system, loading system and data collecting system.
Described device, its test specimen manufacturing system includes two identical dismountable rectangle steel molding jigs, by front template,
Rear pattern plate, left mould plate, right template and bolt composition, be used for manufacturing the upper and lower two dish class sillars of structural plane；There is the thin of waviness
Steel plate is used for manufacturing " on-plane surface " and has the structural plane of roughness, is formed by Digit Control Machine Tool compacting.
Described device, its sample system includes that dish sillar (11), lower wall sillar (14), " on-plane surface " have roughness
Structural plane (13), charges (25) and Wrap device (26), the material that described charges (25) are chosen is yellow mud, soil or slip casting
Material and similar material thereof, wherein the moisture content of yellow mud is 50%-65%；Wherein soil particle diameter be divided into gravelly sand, coarse sand, medium sand,
Fine sand, five grades of flour sand；Wherein injecting paste material is generally modified urea-formaldehyde resin, wherein Lauxite, oxalic acid and additive ratio
Example is 120:2:3；Using large size pvc pipe is Wrap device, is allowed to be adjacent to surface of test piece by heat shrink, thus prevents filling
Thing is scattered in process of the test.
Described device, its loading system includes normal pressure charger, shearing force charger, two 7 fonts
Load plate, roller group and reaction frame, described normal pressure charger includes servomotor I (2), reductor I (3), the first ball
Leading screw (4), the first ball-screw cylinder (5) and seaming chuck (9), shearing force charger includes servomotor II (22), reductor
II (21), the second ball-screw (18), the second ball-screw cylinder (20) and right pressure head (15), roller group (23) is placed in down 7 fonts and adds
Between support plate (16) and base (24), during test, reduce the frictional force between load plate and base.
The present invention provides a kind of method of test class rock material structural plane shearing force, it is characterised in that
(1) test specimen makes: front template, left mould plate, right template, rear pattern plate, bolt, be assembled into rectangular mould, totally two
Rectangular mould；Then take P32.5 cement, select sand and water to be the proportions of 26:25:10 according to its mass ratio through 20 mesh sieves
It is mixed and stirred for, injects first mould after stirring, sheet metal is alignd with mould and is pressed against upper surface；Second mould
Tool alignment is positioned on first mould, and the modeling material that stirs is injected second mould, take out after maintenance for
Experimental test, respectively as upper and lower dish sillar (11,14)；Wherein, described sheet metal is the sheet metal of different waviness；Described
Upper and lower dish sillar (11,14) is processed further out " on-plane surface " and has the structural plane of roughness；
(2) normal pressure is applied: control normal pressure, the first ball-screw of servosystem by computer controller (27)
(4) drive seaming chuck (9) normal pressure is provided from top to bottom, seaming chuck (9) by upper 7 font load plate (10) by normal pressure
Pass to dish sillar (11) on rock structural face；
(3) shearing force is applied: the second ball-screw (18) drives right pressure head (15) from right to left to rock structural face lower wall
Sillar (14) applies shearing force, is controlled the loading shear displacemant of rock structural face lower wall sillar (14) by computer controller (27)
Speed；
(4) data acquisition: by left dislocation extensometer LVDT 7, right elasticity modulus LVDT 8 Real-time Collection rock texture
On rock structural face in the shear history of face, the normal direction of dish sillar (11) cuts swollen displacement, by the first pressure transducer (6), second
The normal force of pressure transducer (17) Real-time Collection rock structural face upper and lower dish sillar and the size of shearing force.
Described method, increases step interview part containing yellow mud sandwich and produces: take step between step (1), (2)
(1) lower wall rocks test specimen lies against ground, then yellow mud material uniform spreading is sprinkled upon on fissure-plane, by upper dish rocks test specimen
Cover above, take pvc pipe (26) and move towards direction along vertical stratification face and wrap upper dish sillar (11), charges (25), lower wall
Sillar (14), completes producing containing yellow mud sandwich interview part.
Specifically:
1, test specimen producing device, makes rock-like materials test specimen
As shown in Fig. 2 (Fig. 2 includes A and B), Fig. 3, rock-like materials test specimen producing device, make mould including test specimen, no
Sheet metal with waviness；It is characterized in that, it is two identical dismountable rectangle steel molding jigs that described test specimen makes mould,
It is made up of front template (28), rear pattern plate (29), left mould plate (30), right template (31) and bolt (32) (8 altogether).By at mould
The modeling material that in tool, casting is similar to rock makes test specimen, and the coagulated material of this modeling material is P32.5 cement, aggregate used
For sand, the husky sieve model of screening is 20 mesh (aperture 0.85mm), is then 26:25 by cement, sand and water according to its mass ratio:
The proportions of 10 mixes, and uses manual stirring, injects first mould, alignd with mould by sheet metal after stirring
It is pressed against upper surface, second mould alignment is positioned on first mould, the modeling material stirred is injected second
Individual mould, after the natural curing demoulding in 24 hours, sends into standard curing room maintenance, takes out for experimental test after 28 days.
2, the test specimen containing weak intercalated layer is produced
The material that described weak intercalated layer is chosen is yellow mud, soil and injecting paste material and similar material thereof, wherein prepares yellow mud
Moisture content is respectively 50%, 55%, 60%, 65% 4 kind, its viscosity be respectively 328MPa.s, 101MPa.s, 76MPa.s,
23MPa.s, the particle diameter of soil is divided into gravelly sand, coarse sand, medium sand, fine sand, five grades of flour sand；For the serosity of injecting paste material in engineering
Gel time has certain requirement, the shortest meeting of serosity gel time to cause serosity not flow to specify position just solidification, and serosity coagulates
The glue time is oversize, can cause serosity and dynamic water mixed diluting, it is impossible to solidification, and therefore construction is that requirement gel time can not be too
Long, again can not be the shortest, usually a few minutes, as Lauxite, oxalic acid and additive in the injecting paste material of interlayer in the present invention
Ratio is 120:2:3, its gel time is more suitable and slurry condense after intensity bigger.In the producing process of weak intercalated layer, first
First lower wall rocks test specimen is lain against ground, then the yellow mud prepared or injecting paste material are placed in container to partly condensing shape
Spreading upon after state on fissure-plane, thickness about 5mm, finally upper dish rocks test specimen being covered above until completing to condense, thus
Complete producing of the structural plane containing weak intercalated layer；Before the test, outside the test specimen containing weak intercalated layer, one layer and structure are wrapped up
Consistent pvc pipe (42) is moved towards in face, prevents filler to be scattered in process of the test, and this kind of pvc pipe has certain elasticity also
And heat shrinkable such that it is able to being adjacent to surface of test piece, have preferably parcel property, this material is to the shearing in test shear history
Resistance is the least, is substantially negligible for comparing the shearing force that test specimen is subject to.
3, rock structural face shear, in order to realize the shearing of structural plane
As it is shown in figure 1, a kind of rock-like materials structural plane shear, including test specimen manufacturing system, loading system sum
According to acquisition system；It is characterized in that, described loading system includes normal pressure charger, shearing force charger, two 7 words
The load plate of type, roller group and reaction frame, described normal pressure charger includes servomotor I (2), reductor I (3), first
Ball-screw (4), the first ball-screw cylinder (5) and seaming chuck (9), shearing force charger includes servomotor II (22), subtracts
Speed machine II (21), the second ball-screw (18), the second ball-screw cylinder (20) and right pressure head (15), roller group (23) puts down 7 fonts
Between load plate (16) and base (24), during test, reduce the frictional force between load plate and base；Test specimen is placed in down 7 fonts
In load plate (16), control servomotor II (22) by computer and reductor II (21) operating drives the second ball-screw (18)
Along slideway (19) motion, test specimen is the most mobile to contacting with upper 7 font load plate (10), control servo electricity by computer
Machine I (2) and reductor I (3) operating drive the first ball-screw (4) to move down and pass through seaming chuck (9) and apply the most constant
Normal stress, right pressure head (15) applies shearing force to structural plane lower wall sillar from right to left, is controlled by computer controller (27)
The loading shear displacemant speed of lower wall sillar.
4, assembly of the invention and the beneficial effect of method
The explanation of term: a kind of rock-like materials structural plane of the present invention is produced and for the device of shearing test, including
Test specimen manufacturing system, sample system, loading system and data collecting system.System among these, the implication of essence is exactly " structure
Unit " or the meaning of " unit ".
" on-plane surface " has the structural plane of roughness: also referred to as, the structural plane of different roughness.The present invention is a kind of preferably
Scheme be taken from: produce random point by MATLAB software construction random function, each point coordinates SPL connected raw
Becoming 5 random fractal curves, dot spacing is 0.5mm, and length of curve L is 100mm, obtain curve JRC value be respectively 3.454,
7.814、11.249、15.386、19.582.The curve that rock joint section curve random fractal produces replaces nature joint to cut open
Face, generates the curve of different roughness according to demand.Digit Control Machine Tool is used to be pressed into as fractal curve according to fractal curve
Shape, the sheet metal of same waviness.
Technical program of the present invention lies in: the innovation of the present invention: (1) uses rock-like materials to make sillar test specimen,
And test specimen making mould installing/dismounting is simple.(2) " on-plane surface " has structural plane (also referred to as, the different roughness of roughness
Structural plane) design, there is typicality, representativeness.(3) structural plane of the different filling state of filler simulation, it is possible to grind
Study carefully the shearing situation in different filling status architecture face.The especially design of yellow mud.(4) large size pvc pipe parcel test specimen, it is ensured that test
During charges will not be scattered, and pvc pipe is flexible material, little on result of the test impact in process of the test.(5) its
He: two 7 font load plate are supporting with test specimen, and device is simple to operation, and precision is high, data acquisition and control automatization.Shear sets
Put roller group, during test, reduce the frictional force between load plate and base.In short, different roughness can be made, fill containing difference
Fill out the structural plane test specimen of thing, facilitate experimental study, and invent the shear of matched use and anti-charges in examination
The Wrap device being scattered during testing.The present invention arranges shear, it is possible to realize under different wavinesses, different filling state
Structural plane carry out shearing test.This is prominent advantage and the advantage place of the present invention, is also its main innovation point.
Accompanying drawing explanation
Fig. 1 is rock-like materials structural plane shear structural representation；
Fig. 2 is that rock-like materials test specimen makes mould schematic diagram；
Fig. 3 is the sheet metal profile of different waviness；
Fig. 4 is containing weak intercalated layer structural plane test specimen profile.
In figure: 1, reaction frame, 2, servomotor I, 3, reductor the I, 4, first ball-screw, the 5, first ball-screw cylinder,
6, the first pressure transducer, 7, left dislocation extensometer LVDT, 8, right elasticity modulus LVDT, 9, seaming chuck, 10, upper 7 font pressures
Plate, 11, dish sillar on rocks structural plane, 12, left fixed block, 13, structural plane, 14, rocks structural plane lower wall sillar, 15,
Right pressure head, 16, lower 7 font pressing plates, the 17, second pressure transducer, the 18, second ball-screw, 19, slideway, the 20, second ball wire
Cylinder, 21, reductor II, 22, servomotor II, 23, pressure roller group, 24, base, 25, charges, 26, pvc pipe, 27, computer controls
Device, 28, front template I, 29, rear pattern plate I, 30, left mould plate I, 31, right template I, 32, bolt I, 33, front template II, 34, rear pattern plate
II, 35, left mould plate II, 36, right template II, 37, bolt II, 38, sheet metal section I, 39, sheet metal section II, 40, sheet metal
Section III, 41, sheet metal section IV, 42, sheet metal section V.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings, but the present invention is not limited to this.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, the rock-like materials structural plane of the present invention is produced, shear, including test specimen
Manufacturing system, loading system and data collecting system.Described test specimen manufacturing system is by the identical mould of two specifications and 5 pieces of differences
The sheet metal composition of waviness, lower wall test specimen makes mould by front template I 28, left mould plate I 30, right template I 31, rear pattern plate I 29,
Bolt 32 (8 altogether) assembles, and upper dish test specimen makes mould by front template II 33, left mould plate II 35, right template II 36, after
Template II 34, bolt II 37 (8 altogether) assembles, and when making test specimen, is kept flat by the lower wall test specimen assembled making mould
In ground, concrete after stirring injects wherein, takes a certain block of sheet metal and aligns with mould and be pressed against its upper surface,
The upper dish test specimen assembled makes mould alignment be positioned on first mould, then the concrete stirred is injected second
Individual mould, after the natural curing demoulding in 24 hours, sends into standard curing room maintenance, takes out for experimental test after 28 days；Described weakness
The material that interlayer is chosen is cohesive soil and injecting paste material and similar material thereof, in the producing process of weak intercalated layer, first by lower wall
Rocks test specimen lies against ground, then the yellow mud prepared or injecting paste material is placed in container and smears to half coagulated state
On fissure-plane, thickness about 5mm, finally upper dish rocks test specimen is covered above until completing to condense, thus complete containing soft
Producing of the structural plane of weak interlayer；As shown in Figure 1 loading system include normal pressure charger, shearing force charger, two
The load plate of individual 7 fonts, roller group and reaction frame, described normal pressure charger includes servomotor I 2, reductor I 3, first
Ball-screw the 4, first ball-screw cylinder 5 and seaming chuck 9, shearing force charger include servomotor II 22, reductor II 21,
Second ball-screw the 18, second ball-screw cylinder 20 and right pressure head 15, roller group 23 put down 7 font load plate 16 and base 24 it
Between, reduce the frictional force between load plate and base during test；Test specimen is placed in down in 7 font load plate 16, by computer control
Servomotor II 22 processed and reductor II 21 operating drive the second ball-screw 18 to move along slideway 19 and are the most slowly moved by test specimen
Move and contact to upper 7 font load plate 10, control servomotor I 2 by computer and reductor I 3 operating drives the first ball wire
Thick stick 4 moves down and passes through seaming chuck 9 and applies certain constant normal stress, and right pressure head 15 is from right to left to structural plane lower wall sillar
Apply shearing force, controlled the loading shear displacemant speed of lower wall sillar by computer controller；Described data collecting system includes
First pressure transducer 6, left dislocation extensometer LVDT 7, right elasticity modulus LVDT the 8, second pressure transducer 17, described
One pressure transducer 6 is between the first ball-screw cylinder 5 and seaming chuck 9, and described left dislocation extensometer LVDT 7, right displacement are drawn
Stretch meter LVDT 8 to lay respectively at seaming chuck about 9 and hold upper surface, described second pressure transducer be positioned at the second ball wire cylinder 20 with
Between right pressure head 15.
Embodiment 1～embodiment 5 are set forth below to describe the enforcement of the present invention in detail.
Embodiment 1
The rock-like materials structural plane of the present invention is produced, cutting method, comprises the steps:
(1) test specimen makes: front template I 28, left mould plate I 30, right template I 31, rear pattern plate I 29, bolt 32 (8 altogether)
It is assembled into the rectangular mould of length × width × height=100mm × 160mm × 100mm, front template II 33, left mould plate II 35, right mould
Plate II 36, rear pattern plate II 34, bolt II 37 (8 altogether) is assembled into the square of length × width × height=100mm × 160mm × 100mm
Shape mould, then takes P32.5 cement, husky (sieve model is 20 mesh, aperture 0.85mm) through screening, and water is according to its mass ratio
Proportions for 26:25:10 is mixed and stirred for, after stirring inject first mould, by length × width × height=110mm ×
The sheet metal of 170mm × 5mm aligns with mould and is pressed against upper surface, and second mould alignment is positioned on first mould,
The modeling material stirred is injected second mould, after the natural curing demoulding in 24 hours, feeding standard curing room maintenance, 28
Take out for experimental test after it.
Wherein, about sheet metal, random point is produced by MATLAB software construction random function, by each point coordinates batten
Curve connects 5 random fractal curves of generation, and dot spacing is 0.5mm, and length of curve L is 100mm, obtains the JRC value point of curve
It is not 3.454,7.814,11.249,15.386,19.582.The curve that rock joint section curve produces with random fractal replaces
Natural joint section, generates the curve of different roughness according to demand.Use Digit Control Machine Tool to be pressed into according to fractal curve and divide
The same shape of sigmoid curves, the sheet metal of same waviness.
(2) normal pressure is applied: the size being controlled normal pressure by computer controller 27 is 40KN, the of servosystem
One ball-screw 4 drives seaming chuck 9 to provide normal pressure 40KN from top to bottom, seaming chuck 9 by upper 7 font load plate 10 by method
Dish sillar 11 on rock structural face is passed to pressure 40KN.
(3) shearing force is applied: the second ball-screw 18 drives right pressure head 15 from right to left to rock structural face lower wall sillar
14 apply shearing force, and the loading shear displacemant speed being controlled rock structural face lower wall sillar 14 by computer controller 27 is
0.005mm/s。
(4) data acquisition: by left dislocation extensometer LVDT 7, right elasticity modulus LVDT 8 Real-time Collection rock texture
On rock structural face in the shear history of face, the normal direction of dish sillar 11 cuts swollen displacement, by first pressure transducer the 6, second pressure
Sensor 17 gathers normal force and the size of shearing force of real-time rock structural face upper and lower dish sillar.
It is 6.24MPa that above-mentioned treatment conditions obtain rock-like materials structural plane to be sheared peak strength, and peak value is cut swollen displacement and is
0.74mm。
Embodiment 2
The present embodiment uses embodiment substantially the same manner as Example 1, and difference is: embodiment step (1),
(2) increase step structural plane test specimen Han yellow mud to produce: take step 1 lower wall rocks test specimen and lie against ground, then joining
The moisture content made be 50% yellow mud be placed in container and spread upon on fissure-plane to half coagulated state, thickness about 5mm, finally
Upper dish rocks test specimen being covered above until condensing completely, after condensing completely, taking the pvc pipe 26 of a length of 100mm along hanging down
Straight structural plane moves towards direction and wraps dish sillar 11, charges 25, lower wall sillar 14, uses high-power heat gun PVC
Pipe is allowed to shrink surface of test piece of fitting completely, completes the producing of structural plane test specimen of the yellow mud that moisture content is 50%.
It is 1.56MPa that above-mentioned treatment conditions obtain the shearing peak strength containing yellow mud structural plane, and peak value is cut swollen displacement and is
0.12mm。
Embodiment 3
The present embodiment uses embodiment substantially the same manner as Example 1, and difference is: embodiment step (1),
(2) increase a step conglomeratic sand structural plane test specimen produce: take step 1 lower wall rocks test specimen and lie against ground, then
The gravelly sand uniform spreading screened is sprinkled upon on fissure-plane, thickness about 5mm, finally covers upper dish rocks test specimen above, takes length
The pvc pipe 26 that degree is 100mm moves towards direction and wraps upper dish sillar 11, charges 25, lower wall sillar 14 along vertical stratification face, adopts
It is allowed to shrink, with high-power heat gun pvc pipe, surface of test piece of fitting completely, completes the producing of structural plane test specimen of conglomeratic sand.
It is 3.01MPa that above-mentioned treatment conditions obtain the shearing peak strength of conglomeratic sand structural plane, and peak value is cut swollen displacement and is
0.46mm。
Embodiment 4
The present embodiment uses embodiment substantially the same manner as Example 1, and difference is: embodiment step (1),
(2) increase step structural plane test specimen Han injecting paste material to produce: take step 1 lower wall rocks test specimen and lie against ground, then
The injecting paste material prepared is placed in container to be spread upon on fissure-plane to half coagulated state, and thickness about 5mm, finally by upper dish
Rocks test specimen covers above until condensing completely, after condensing completely, takes the pvc pipe 26 of a length of 100mm along vertical stratification
Face is moved towards direction and is wrapped dish sillar 11, charges 25, lower wall sillar 14, uses high-power heat gun pvc pipe to be allowed to
Shrink surface of test piece of fitting completely, complete producing containing injecting paste material structural plane test specimen.
It is 4.78MPa that above-mentioned treatment conditions obtain the shearing peak strength containing injecting paste material structural plane, and peak value cuts swollen displacement
For 0.36mm.
Claims (6)
1. a rock-like materials structural plane is produced and for the device of shearing test, it is characterised in that: include that test specimen makes system
System, sample system, loading system and data collecting system.
Device the most according to claim 1, described test specimen manufacturing system includes two identical dismountable rectangle steel molding jigs,
It is made up of front template, rear pattern plate, left mould plate, right template and bolt, is used for manufacturing the upper and lower two dish class sillars of structural plane；Have
The sheet metal of waviness is used for manufacturing " on-plane surface " and has the structural plane of roughness, is formed by Digit Control Machine Tool compacting.
Device the most according to claim 1, described sample system includes dish sillar (11), lower wall sillar (14), " non-flat
Face " there is the structural plane (13) of roughness, charges (25) and Wrap device (26), the material that described charges (25) are chosen is
Yellow mud, soil or injecting paste material and similar material thereof, wherein the moisture content of yellow mud is 50%-65%；Wherein the particle diameter of soil is divided into gravel
Sand, coarse sand, medium sand, fine sand, five grades of flour sand；Wherein injecting paste material is generally modified urea-formaldehyde resin, wherein Lauxite, grass
Acid and additives ratio are 120:2:3；Using large size pvc pipe is Wrap device, is allowed to be adjacent to surface of test piece by heat shrink,
Thus prevent charges to be scattered in process of the test.
Device the most according to claim 1, described loading system include normal pressure charger, shearing force charger,
The load plate of two 7 fonts, roller group and reaction frame, described normal pressure charger includes servomotor I (2), reductor I
(3), the first ball-screw (4), the first ball-screw cylinder (5) and seaming chuck (9), shearing force charger includes servomotor II
(22), reductor II (21), the second ball-screw (18), the second ball-screw cylinder (20) and right pressure head (15), roller group (23) is put
Between lower 7 font load plate (16) and base (24), during test, reduce the frictional force between load plate and base.
5. the method for a test class rock material structural plane shearing force, it is characterised in that
(1) test specimen makes: front template, left mould plate, right template, rear pattern plate, bolt, be assembled into rectangular mould, totally two rectangles
Mould；Then P32.5 cement is taken, through 20 mesh sieve choosings are husky and water mixes according to the proportions that its mass ratio is 26:25:10
And stir, inject first mould after stirring, sheet metal is alignd with mould and is pressed against upper surface；Second mould pair
Full cry and be placed on first mould, the modeling material stirred is injected second mould, takes out for test after maintenance
Test, respectively as upper and lower dish sillar (11,14)；Wherein, described sheet metal is the sheet metal of different waviness；Described upper and lower
Dish sillar (11,14) is processed further out " on-plane surface " and has the structural plane of roughness；
(2) normal pressure is applied: control normal pressure, first ball-screw (4) of servosystem by computer controller (27)
Driving seaming chuck (9) to provide normal pressure from top to bottom, normal pressure is passed by seaming chuck (9) by upper 7 font load plate (10)
Pass dish sillar (11) on rock structural face；
(3) shearing force is applied: the second ball-screw (18) drives right pressure head (15) from right to left to rock structural face lower wall sillar
(14) apply shearing force, controlled the loading shear displacemant speed of rock structural face lower wall sillar (14) by computer controller (27)
Rate；
(4) data acquisition: by left dislocation extensometer LVDT 7, right elasticity modulus LVDT 8 Real-time Collection rock structural face is cut
On rock structural face during cutting, the normal direction of dish sillar (11) cuts swollen displacement, by the first pressure transducer (6), the second pressure
The normal force of sensor (17) Real-time Collection rock structural face upper and lower dish sillar and the size of shearing force.
Method the most according to claim 5, increases a step and interviews part system containing yellow mud sandwich between step (1), (2)
Take: take step (1) lower wall rocks test specimen and lie against ground, then yellow mud material uniform spreading is sprinkled upon on fissure-plane, by upper dish
Rocks test specimen covers above, takes pvc pipe (26) and moves towards direction along vertical stratification face and wrap upper dish sillar (11), charges
(25), lower wall sillar (14), complete containing yellow mud sandwich interview the producing of part.
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