CN105651570B - A kind of preparation method containing the prismatical joint rock mass sample without filling blind joint - Google Patents
A kind of preparation method containing the prismatical joint rock mass sample without filling blind joint Download PDFInfo
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- CN105651570B CN105651570B CN201511016772.5A CN201511016772A CN105651570B CN 105651570 B CN105651570 B CN 105651570B CN 201511016772 A CN201511016772 A CN 201511016772A CN 105651570 B CN105651570 B CN 105651570B
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- joint
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- blind
- rock mass
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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
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
Abstract
The present invention relates to a kind of preparation methods containing the prismatical joint rock mass sample without filling blind joint, include the following steps：Structure, the form of blind joint in the practical prismatical joint rock mass of simulation determine the 3-dimensional digital spatial model of all types of blind joints in sample；The 3-dimensional digital spatial model of different type blind joint is obtained different types of blind joint simulation component, hot melt adhesive is smeared in gained blind joint simulation component surface through 3D printing using water-soluble material；It prepares cement mortar and simulates practical prismatical joint rock mass, blind joint is simulated into component and pours into mold, maintenance to formation sample component with cement mortar mixing；Demoulding；By the sample component after demoulding is toasted, full water, drying, maintenance, working process to get.3D printing technique is used to prepare blind joint simulation component, the accurate form and structure for controlling blind joint by the present invention；Blind joint simulation component is prepared using water-soluble material, the component of blind joint is simulated when solving the problems, such as to prepare sample to be taken out.
Description
Technical field
The present invention relates to the preparation methods of a type rock mass sample, and in particular to a kind of containing the column section without filling blind joint
The preparation method of rock mass sample is managed, belongs to rock mechanics field.
Background technology
Prismatical joint be slag eruption flooding process in due to cooling meat is formed in irregularly or conformation of rules
Primary extension fracture construction, prismatical joint more come across basalt, widely distributed in Southwestern China area, southwest is many
It is built or be located on the basalt of prismatical joint building large hydropower station.Prismatical joint rock mass is as a kind of with special construction
Rock mass not only has the intercolumniation joint plane of exposure, also has implicit joint plane, referred to as blind joint in column, due to column section
The presence of rock mass intercolumniation joint and blind joint is managed, causes prismatical joint rock mass that there is each to different of significant mechanics and penetration property
Property, engineering safety is influenced significantly, therefore study the mechanics of prismatical joint rock mass and the anisotropy of penetration property, had higher
Reality and engineering value.
Experiment be rock mechanics field pass through frequently with a kind of research method, since prismatical joint rock mass includes multigroup section
It manages and columnar volume is larger, limited by laboratory test specimen size size, contained only in the natural rock sample that engineering site is taken
One group or not comprising joint, it can not fully reflect the anisotropy of prismatical joint rock mass；And due to prismatical joint rock mass geometry
The variability of property, different ROCK MASS JOINTs differ greatly, and the result of the test for being derived from the natural rock sample of part rock mass does not have fully
Representativeness, therefore the method for usually selecting artificial sample preparation prepares prismatical joint rock sample, but it is artificial to prepare prismatical joint rock mass at present
The method of rock sample is also incomplete, is only capable of preparing the prismatical joint rock mass sample at the intercolumniation joint for containing only exposure, there are no effective
Method prepare containing the prismatical joint rock mass sample without filling blind joint, but mechanics and infiltration of the blind joint to prismatical joint rock mass
Characteristic and anisotropy have significant impact, and Practical Project scene prismatical joint rock cannot fully be simulated by ignoring blind joint
The property of body, therefore how to prepare and be badly in need of containing the prismatical joint rock mass sample without filling blind joint as rock mechanics experiment field
It solves the problems, such as.
Invention content
Goal of the invention：The purpose of the present invention is to provide a kind of systems containing the prismatical joint rock mass sample without filling blind joint
Preparation Method, sample made from this method can completely reflect the structure and form of blind joint inside the rock mass of prismatical joint.
Technical solution：The present invention relates to a kind of preparation method containing the prismatical joint rock mass sample without filling blind joint, packets
Include following steps：
(1) structure, the form of blind joint in practical prismatical joint rock mass are simulated, determines various types in sample to be prepared
The 3-dimensional digital spatial model of blind joint；
(2) the 3-dimensional digital spatial model of different type blind joint is subjected to 3D printing using water-soluble material, obtained not
The blind joint simulation component of same type smears hot melt adhesive in gained blind joint simulation component surface；
(3) mechanical property for simulating practical prismatical joint rock mass prepares cement mortar, and blind joint is simulated component and cement
Mortar is poured into after being mixed in mold, is conserved, and is made cement mortar solidification molding, is formed sample component；
(4) sample component is demoulded；
(5) baking sample component melts completely to hot melt adhesive, then carries out full water, completely molten to blind joint simulation component
Solution, drying, maintenance, working process are obtained containing the prismatical joint rock mass sample without filling blind joint.
3D printing technique is used to prepare blind joint simulation component by the present invention, can accurately control size, the sky of blind joint
Between form, the roughness of joint plane；Blind joint simulation component is prepared using water-soluble material, by the completely full water of sample component
The component of dissolving simulation blind joint solves what the component of simulation blind joint when preparing containing without filling blind joint sample can not take out
Problem.
Preferably, water-soluble material is PVA materials.
Specifically, in step (5), the sample component after baking is carried out into the water to vacuumize full water.Vacuumize full water
Sample component can quickly be allowed to reach water-saturated state, moisture is well into inside sample component.
Preferably, the part that the mold in step (3) is contacted with cement mortar is made of cochrome material, and in the portion
Divide surface smear hot melt adhesive.Hot melt adhesive and the cohesive force of cochrome are weaker, stronger to the cohesive force of cement mortar, by hot melt adhesive
The surface of cochrome mold is uniformly applied to, before cement mortar solidification forms sample component, blocks cement mortar and mold
Bonding, when avoiding subsequently demoulding destroy sample component structure.
Further, in step (3), the mold bottom sets Packed stomata, during demoulding, which is released close
Envelope, blasts air into mold from stomata, is removed from the mold sample component.It is convenient in demoulding fast, and sample will not be destroyed
The structure of component.
Preferably, in step (2), the thickness of the hot melt adhesive of smearing is 0.5~0.6mm.At this point, very thin hot melt adhesive can be with
Complete simulation blind joint face or the roughness on practical rock mass surface.
Specifically, in step (5), by the sample component after maintenance through being bonded, cutting, polishing obtains containing without filling blind joint
Prismatical joint rock mass sample.
Advantageous effect：Compared with prior art, the advantage of the invention is that：
(1) 3D printing technique is applied to the system containing the prismatical joint rock mass sample without filling blind joint by the present invention for the first time
Make, using 3-dimensional digital spatial model can completely show the type of blind joint in prepared prismatical joint rock mass sample, size,
Spatial shape and roughness make the component of simulation blind joint by 3D printing technique, can be by 3-dimensional digital spatial model essence
Physical model really is printed as, can accurately control the size of blind joint, spatial shape, the roughness of joint plane；Meanwhile the present invention
Blind joint simulation component is prepared using water-soluble material, completely full water can simulate the component of blind joint in dissolved samples component,
Solving the problems, such as to prepare to contain can not take out without blind joint simulation component in filling blind joint sample；Moreover, it is applied in component surface
Smear hot melt adhesive, it is therefore prevented that component in cement mortar contact process with dissolving；
(2) part contacted in mold with cement mortar is prepared by using cochrome, and smears and heats in the part
Glue can avoid the bonding of cement mortar and mold, so that being molded sample from effectively demoulding；
(3) by reserving aperture in mold bottom, in demoulding, by blasting air into mold from aperture, by sample
Component ejection die, fast demoulding are convenient in demoulding fast, will not destroy sample component or the wherein structure of blind joint；
(4) method of the invention is easy to operate, efficiently, fast, has a wide range of application, can prepare difference according to actual needs
Type, without filling blind joint prismatical joint rock mass sample, is opened up containing labyrinth to make to contain without filling blind joint rock mass sample
New approaches.
Description of the drawings
Fig. 1 is the flow chart of the preparation method containing the prismatical joint rock mass sample without filling blind joint of the present invention.
Specific embodiment
Technical scheme of the present invention is described further below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of preparation method containing the prismatical joint rock mass sample without filling blind joint of the present invention, including
Following steps：
(1) structure, the form of blind joint in practical prismatical joint rock mass are simulated, such as the number of types, size, sky of blind joint
Between form, roughness etc., determine the 3-dimensional digital spatial model of various types blind joint in sample to be prepared；
(2) using water-soluble material, such as PVA materials, by 3D printing technique by the 3-dimensional digital of different type blind joint
Spatial model is printed as different types of blind joint simulation component, and smears hot melt adhesive in gained blind joint simulation component surface；
Blind joint simulation component surface smear hot melt adhesive, can prevent component with met in cement mortar contact process it is water-soluble
Solution；In order to completely simulate the roughness in blind joint face, the thickness control of hot melt adhesive can will be smeared in 0.5~0.6mm；It can
Hot melt adhesive is smeared using high-precision thermosol gelgun, high-precision thermosol gelgun can be accurately controlled the volume of hot melt adhesive ejection,
The precision of the hot melt adhesive of smearing can be controlled in 0.1mm or so.
(3) mechanical property of simulation prismatical joint rock mass prepares cement mortar, and various types of blind joints are simulated component
Mold is poured into after being mixed with cement mortar, is then conserved, makes cement mortar solidification molding, form sample component；
The part that mold is contacted with cement mortar can be used cochrome material and be made, and smears and heat in the part surface
Glue, it is stronger to the cohesive force of cement mortar since the cohesive force of hot melt adhesive and cochrome is weaker, hot melt adhesive is uniformly applied to
The surface of cochrome mold before cement mortar solidification forms sample component, blocks cement mortar and the bonding of mold, avoids
The structure of sample component is destroyed during follow-up demoulding.
Likewise, in order to completely simulate the roughness on rock mass surface, the thickness control for smearing hot melt adhesive can be existed
0.5~0.6mm；High-precision thermosol gelgun can be used and smear hot melt adhesive, high-precision thermosol gelgun can be accurately controlled hot melt
The volume that glue sprays, the precision of the hot melt adhesive of smearing can be controlled in 0.1mm or so.
(4) sample component is demoulded；
Packed stomata can be set in mold bottom, during demoulding, by the stomata depressurization, from stomata into mold in advance
Air is blasted, sample component can be removed from the mold；This method is convenient in demoulding fast, and will not destroy sample component and inside
The structure of blind joint.
(5) baking sample component melts completely to hot melt adhesive, then carries out full water, until blind joint simulation component is completely molten
Solution, can carry out the sample component after baking into the water to vacuumize full water, vacuumizing full water quickly can allow sample component to reach
To water-saturated state, moisture is well into inside sample component；The sample component after drying, maintenance, maintenance is then taken out through adding
Work processing, such as bonding, cutting, polishing, obtain containing the prismatical joint rock mass sample without filling blind joint.
3D printing technique is applied to the making containing the prismatical joint rock mass sample without filling blind joint by the present invention, specifically
, 3D printing technique is used to prepare blind joint simulation component, can accurately control the size, spatial shape, joint of blind joint
The roughness in face completely reflects the structure and form of blind joint inside the rock mass of prismatical joint；And it is prepared using water-soluble material
Blind joint simulation component, by the completely full water of sample component, blind joint simulation component can be completely dissolved, solve preparation and be filled containing nothing
The problem of blind joint simulation component can not take out when filling out blind joint sample.
Embodiment
By prepare at some hydropower station riverbed dam foundation containing without filling blind joint prismatical joint rock mass rock sample for, it is of the invention
Preparation method containing the prismatical joint rock mass sample without filling blind joint is as follows：
(1) it according to the geologic information of prismatical joint rock mass at the Hydropower Station river dam foundation, is determined according to similarity relation made
The type of blind joint in the rock mass sample of standby prismatical joint, quantity, size, spatial shape, roughness make different type in sample
The 3-dimensional digital spatial model of blind joint.
(2) the 3-dimensional digital spatial model of blind joint is inputted into 3D printer, is beaten respectively using water-soluble PVA materials
Different types of blind joint simulation component is printed off, prints size, spatial shape, the surface roughness of blind joint simulation component,
Fully simulate the form of blind joint in engineering site rock mass, and the component surface uniformly smeared with thermosol gelgun one layer it is very thin
Hot melt adhesive, thickness be 0.5~0.6mm, hot melt adhesive can closely be sticked to blind joint simulation component surface, will not mix cement
It comes off during mortar, while blind joint is avoided to simulate component with being dissolved in cement mortar contact process.
(3) mechanical property of prismatical joint sillar is simulated, sample is prepared by raw material of cement mortar, it is true according to similarity relation
Determine the proportioning of cement mortar, finally determining sample is by Portland cement, natural river sand and water example 1 in mass ratio:0.5:0.4
It mixes, wherein river sand grain size is less than 1mm, adds in the permeability-reducing admixture and water-reducing agent of gross mass 0.5%, the barrier properties of reinforcement material
The mobility of energy and cement reduces porosity, adds in a little antifoaming agent, and the bubble reduced in cement hydration process generates.According to
The type containing blind joint and the quantity of each type blind joint, are put into respective type in identified prismatical joint rock mass sample
It is sufficiently stirred with the blind joint simulation component of quantity with cement mortar, blind joint simulation component is made uniformly to divide in cement mortar
Cloth.Cement mortar is molded using mold made of cochrome material, mold bottom sets Packed stomata, and in mold
Hot melt adhesive is uniformly smeared in the part that portion is contacted with cement mortar, and the cement mortar stirred evenly and blind joint simulation component are poured into
Mold is 22 DEG C in temperature, and maintenance to cement mortar solidification is molded in the climatic chamber that humidity is 90%, forms sample portion
Part.
(4) the sealing stomata of mold bottom is opened, air is blasted into mold from stomata, makes sample component from mold
Abjection.
(5) sample component after demoulding is put into baking oven and is toasted with 80 DEG C of temperature, guarantee is applied to blind joint simulation
After the hot melt adhesive of component surface is melted completely, sample component is put into normal-temperature water and is vacuumized full water 2-4 hours, it is ensured that blind joint
After simulation component is completely dissolved, drying is taken out.Then after being conserved 33 days in 22 DEG C of temperature, the climatic chamber of humidity 90%,
By being bonded, cutting, polishing, obtain containing the prismatical joint rock mass sample without filling blind joint.
Claims (5)
1. a kind of preparation method containing the prismatical joint rock mass sample without filling blind joint, which is characterized in that include the following steps：
(1) structure, the form of blind joint in practical prismatical joint rock mass are simulated, determines the hidden section of various types in sample to be prepared
The 3-dimensional digital spatial model of reason；
(2) the 3-dimensional digital spatial model of different type blind joint is subjected to 3D printing using water-soluble material, obtains inhomogeneity
The blind joint simulation component of type smears hot melt adhesive in gained blind joint simulation component surface, and the thickness of the hot melt adhesive of smearing is 0.5
~0.6mm；
(3) mechanical property for simulating practical prismatical joint rock mass prepares cement mortar, and blind joint is simulated component and cement mortar
It pours into mold, conserves after mixing, make cement mortar solidification molding, form sample component；Wherein, mold and cement mortar
The part of contact is made of cochrome material, and smears hot melt adhesive in the part surface, and the thickness of the hot melt adhesive of smearing is 0.5
~0.6mm；
(4) sample component is demoulded；
(5) baking sample component melts completely to hot melt adhesive, then carries out full water, is completely dissolved to blind joint simulation component, is dried
Dry, maintenance, working process are obtained containing the prismatical joint rock mass sample without filling blind joint.
2. the preparation method according to claim 1 containing the prismatical joint rock mass sample without filling blind joint, feature exist
In in step (5), the sample component after baking being carried out into the water to vacuumize full water.
3. the preparation side containing the prismatical joint rock mass sample without filling blind joint according to any one of claim 1-2
Method, which is characterized in that in step (3), the mold bottom sets Packed stomata, during demoulding, by the stomata depressurization, from
Stomata blasts air into mold, is removed from the mold sample component.
4. the preparation method according to claim 1 containing the prismatical joint rock mass sample without filling blind joint, feature exist
In the water-soluble material is PVA materials.
5. the preparation method according to claim 1 containing the prismatical joint rock mass sample without filling blind joint, feature exist
In, in step (5), by the sample component after maintenance through be bonded, cut, polish obtain containing without filling blind joint prismatical joint rock
Body sample.
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| CN201511016772.5A CN105651570B (en) | 2015-12-29 | 2015-12-29 | A kind of preparation method containing the prismatical joint rock mass sample without filling blind joint |
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