CN105486555A - Method for preparing columnar jointed rock mass model containing blind joints and interlayer shear belts - Google Patents
Method for preparing columnar jointed rock mass model containing blind joints and interlayer shear belts Download PDFInfo
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- CN105486555A CN105486555A CN201510815949.1A CN201510815949A CN105486555A CN 105486555 A CN105486555 A CN 105486555A CN 201510815949 A CN201510815949 A CN 201510815949A CN 105486555 A CN105486555 A CN 105486555A
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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
Abstract
The invention discloses a method for preparing a columnar jointed rock mass model containing blind joints and interlayer shear belts. According to the method, a similar material is utilized to prepare the model to simulate columnar jointed rock mass of an engineering field; oats of different thicknesses and sizes are added in the stirring process of the similar material so as to simulate different characteristics of the blind joint; and interlayer shear belt characteristics including inclination angles, quantities, distances among different interlayer shear belts and mutual included angles of the interlayer shear belts are also arranged. The method is simple in preparation process and easy to operate and overcomes the disadvantage that incapable drilling-out of a rock sample with interlayer shear belts due to a small size of a laboratory rock sample leads to incapable analysis of influence of random blind joints and interlayer shear belts on the mechanical properties of the columnar jointed rock mass in virtue of an original core sample. Columnar jointed rock mass models with different blind joint characteristics, different interlayer shear belt characteristics and different joint thicknesses prepared by using the preparation method can accurately simulate the distribution characteristics and mechanical properties of on-site columnar jointed rock masses.
Description
Technical field
What the present invention relates to is to be rich in the engineering safety problem of prismatic jointing rock mass for major project object of blind joint and inter-laminar dislocation band in the field such as rock mechanics engineering and hydroelectric project, be specifically related to utilize similar material model determination random joints and inter-laminar dislocation band on the impact of column jointed rock mass intensity, mainly a kind of preparation method utilizing preparation to contain the prismatic jointing strata model of blind joint and inter-laminar dislocation band.
Background technology
Prismatic jointing rock mass is the one in a kind of special mass, is the distinctive structure of Irish touchstone, it often cut into by prismatic jointing the prism-shaped pillar of difformity size.Not only grow prismatic jointing rock mass in the Irish touchstone part rock stratum of white crane beach hydroelectric dam basal part, and have several inter-laminar dislocation band to run through whole prismatic jointing rock mass in the middle of whole rock mass, column interior is abundant grows blind joint.Power station, white crane beach will be domestic second largest power station after building up, in its construction, operation, safety and stability implementations is focus, the relaxation problem of its prismatic jointing Black Warrior rock mass in digging process, stability problem under seepage liquefaction effect during operational process under high water head is heavily stressed etc.
Owing to being difficult to the rock sample obtaining the complete lab size in on-the-spot dam foundation place, namely allow to fetch the sample being also difficult to be processed into experiment, because will be broken through polishing containing abundant blind joint one in pillar, and the just single pillar that can obtain returns to process, can not the damage-form of real simulation on-the-spot whole prismatic jointing rock mass, on-the-spot failure mode is structural failure, the intensity surrender of non-pillar.
Because the plasticity of analog material is strong, it is simple to make, cost is low and with strong points, be widely used in the strata model in simulation rock engineering, therefore can simulate this deformation behaviour of prismatic jointing rock mass under different ambient stress being rich in blind joint, inter-laminar dislocation band with analog material.
Application number is respectively 2015100600984,201407443937 and 2014105643869 and is preparation regular irregular prismatic jointing strata model, all propose the new method of some, obtain the beneficial effect that some are good, but a good effective preparation is not all proposed with the on-the-spot corresponding model of prismatic jointing rock mass being rich in blind joint and inter-laminar dislocation band, therefore the model at the more identical scene of this preparation is proposed, the model analysis obtained more can reflect on-the-spot mechanical characteristics.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of method preparing prismatic jointing strata model containing blind joint and inter-laminar dislocation band, the method can obtain the core sample of different blind joint feature, different inter-laminar dislocation band feature, the mechanical characteristics simulating on-the-spot prismatic jointing rock mass that can be relatively accurate.
Technical scheme: for solving the problems of the technologies described above, preparation provided by the invention contains the method for the prismatic jointing strata model of blind joint and inter-laminar dislocation band, comprises the following steps:
Step 1, on-the-spot at column rock mass, get one group of cylinder and add up its shape, size and size; And the characteristic information of the blind joint of column body is added up and record, and get rock sample that cylinder makes standard tests out it rock mechanics parameters through shop experiment;
Step 2, according to the shape of the replacement of statistic record, size and size, utilizes the geometric similarity of empirical model to compare C
1, unit weight ratio of similitude C
y, obtain rock mechanics parameters according to shop experiment, then strength similarity compares C
r=C
1× C
y, elastic modulus ratio of similitude C
e=C
1× C
y, and determine the concrete size of single replacement and the raw material of its different order of label record, analog material and proportioning with this;
Step 3, by the size and dimension of the single replacement finally determined by ratio of similitude in the shape of the cylinder added up at the scene in step 1, size and size and step 2, adopts iron plate split to be formed cellular, for the formation of strata model cylindrical joint;
Step 4, according to specific rule, oatmeal is processed into the fragment shape of different size, thickness, length according to the blind joint quantity of typical column body, mean breadth, average length, thus determines kind and the quantity of the fragment shape oatmeal adding different characteristic in modelling raw material;
Step 5, carries out uniform stirring by the ratio that analog material cement, sand and water are determined according to similarity criterion in step 2, and the fragment shape oatmeal in step 4 being obtained inserts wherein, after stirring again, pours in cube mold; Then be placed in the fog room of constant temperature and humidity, maintenance 1-2h;
Step 6, injects iron plate obtained for step 3 in the model after maintenance according to specific order, then continues model to be placed in the fog room of constant temperature and humidity, maintenance 1-2h;
Step 7, iron plate in the mould of the analog material of band blind joint good for maintenance in step 6 is extracted, then pour into glueing material filling and extract formed joint hole by iron plate, then continue model to be placed in the fog room of constant temperature and humidity, continue maintenance 24-48h;
Step 8, the model in the step 7 good by maintenance is taken out from fog room, is then released by the model in mould, obtains the prismatic jointing strata model containing blind joint;
Step 9, model step 8 obtained according to specific inter-laminar dislocation band feature cuts, and obtains different blocks;
Step 10, utilizes different bindings be bonded together by the block in step 9 and make certain thickness filling, obtains the prismatic jointing strata model containing different blind joint and inter-laminar dislocation band.
As preferably, in described step 1, the characteristic information of the blind joint of column body is added up and record, and get rock sample that cylinder makes standard tests out it rock mechanics parameters through shop experiment.
As preferably, in described step 9, specific inter-laminar dislocation band feature comprises inclination angle, thickness and clipped position.
During use, method of operating is as follows:
1) on-the-spot at column rock mass, get multiple cylinder, add up the shape of its cylinder, size and size; The characteristic information of the blind joint of column body is added up and record, and gets rock sample that pillar makes standard tests out it rock mechanics parameters through shop experiment;
2) according to the shape of the pillar that comes out, size and size, the geometric similarity of empirical model is utilized to compare C
1, unit weight ratio of similitude C
y, obtain rock mechanics parameters according to shop experiment, then strength similarity compares C
r=C
1× C
y, elastic modulus ratio of similitude C
e=C
1× C
y, and with this determine single pillar concrete size and the raw material of its different order of label record, analog material and proportioning;
3) by 1) in the shape of cylinder, size and the size and 2 of adding up at the scene) in the size and dimension of single pillar finally determined by ratio of similitude,
4) according to 3) in the shape and size of single pillar determine the required iron plate of different pillar, the thickness 1-4mm of iron plate, thus the variation in thickness scope that can make joint is 1-4mm;
5) according to specific rule, oatmeal is processed into the fragment shape of different size, thickness, length according to the blind joint quantity of typical column body, mean breadth, average length, thus determine kind and the quantity of the fragment shape oatmeal adding different characteristic in modelling raw material, specific distribution rule is normal distribution, uniform distribution;
6) by analog material cement, sand and water according to 2) in the ratio determined of similarity criterion carry out uniform stirring, and by 5) in fragment shape oatmeal insert wherein, after stirring again gently, pour in the cube mold of 150mm; Then be placed in the fog room of constant temperature and humidity, maintenance 1-2h;
7) by 5 after maintenance) in model take out, by 3) specific iron plate inject in model according to specific order, then continue model to be placed in the fog room of constant temperature and humidity, maintenance 1-2h;
8) then by 6) iron plate in mould in the analog material of maintenance band blind joint extracts, then pour into glueing material filling and extract formed joint hole by iron plate, then continue model to be placed in the fog room of constant temperature and humidity, continue maintenance 24-48h;
9) by good for maintenance 8) in model take out from fog room, then the model in mould is released, thus obtains the prismatic jointing strata model containing blind joint;
10) according to specific inter-laminar dislocation band feature (inclination angle, thickness, clipped position) by 9) model that obtains cuts, and obtains different blocks;
11) utilize different bindings by 10) in block be bonded together and make certain thickness filling, thus obtain the prismatic jointing strata model containing different blind joint and inter-laminar dislocation band.
Beneficial effect: the present invention can prepare the prismatic jointing strata model containing blind joint and inter-laminar dislocation band, analog material prepared by it is that a simulation to be replaced containing blind joint and intercolumniation with the prismatic jointing rock mass of inter-laminar dislocation band, enables in lab size Imitating Test in Situ; The shape of prepared replacement is not quite similar, and is according to the replacement feature interpretation representing rock mass, has sealene triangle, irregular quadrilateral, irregular pentagon, irregular hexagon; Prepared replacement is with random blind joint, meet on-the-spot actual, it finds expression in containing feature of blind joint and obtains the oatmeal simulation of different characteristic by processed, is that the oatmeal adding these different characteristics in the mix process of analog material is to simulate the feature of blind joint.Be applicable to simulate scene, white crane beach and be rich in the mechanical characteristic that blind joint and inter-laminar dislocation band run through the rock mass of rock stratum, prismatic jointing, the material in institute's employing method is simple, with low cost, simple to operate.
Except technical matters, the technical characteristic forming technical scheme and the advantage brought by the technical characteristic of these technical schemes that the present invention recited above solves, the advantage that the other technologies feature comprised in the other technologies problem that the method that preparation of the present invention contains the prismatic jointing strata model of blind joint and inter-laminar dislocation band can solve, technical scheme and these technical characteristics bring, will be described in more detail by reference to the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is the top conceptual iron plate shape figure of cube model in embodiments of the invention;
Fig. 2 is the axonometric drawing of Fig. 1;
Fig. 3 is the side-looking concept map containing the prismatic jointing rock mass cube model of inter-laminar dislocation band in embodiment 1.
Embodiment
In order to understand the present invention further, be described in more detail the present invention below in conjunction with concrete drawings and Examples, embodiment only to the concrete exemplifications effect of the present invention, and does not have any restrictive effect; The insubstantial modifications that any those skilled in the art make on basis of the present invention, all should belong to the scope of protection of the invention.
Embodiment 1
1) on-the-spot at column rock mass, get multiple cylinder, add up the shape of its cylinder, size and size; The characteristic information of the blind joint of column body is added up and record, and gets rock sample that pillar makes standard tests out it rock mechanics parameters through shop experiment;
2) according to the shape of the pillar that comes out, size and size, the geometric similarity of empirical model is utilized to compare C
1, unit weight ratio of similitude C
y, obtain rock mechanics parameters according to shop experiment, then strength similarity compares C
r=C
1× C
y, elastic modulus ratio of similitude C
e=C
1× C
y, and determine the concrete size of single pillar and its different order of label record with this, raw material and the proportioning of this example analog material are respectively: cement: husky: water=1:1:0.5;
3) by 1) in the shape of cylinder, size and the size and 2 of adding up at the scene) in the size and dimension of single pillar finally determined by ratio of similitude prepare specific iron plate, selected pillar geomery as shown in Figure 1,
4) according to 1:1 processing 3) the required iron plate of different pillars, the thickness 2mm of iron plate, thus the variation in thickness scope that can make joint is 2mm, as shown in Figure 2;
5) according to specific rule, oatmeal is processed into the fragment shape of different size, thickness, length according to the blind joint quantity of typical column body, mean breadth, average length, thus determine kind and the quantity of the fragment shape oatmeal adding different characteristic in modelling raw material, specific rule is normal distribution;
6) by analog material cement, sand and water according to 2) in the ratio determined of similarity criterion carry out uniform stirring, and by 5) in fragment shape oatmeal insert wherein, after stirring again gently, pour in the cube mold of 150mm; Then be placed in the fog room of constant temperature and humidity, maintenance 2h;
7) by 6 after maintenance) in model take out, by 3) specific iron plate inject in model according to specific order, then continue model to be placed in the fog room of constant temperature and humidity, maintenance 2h;
8) then by 7) in blind joint after maintenance analog material mould in iron plate extract, then pour into glueing material filling and extract formed joint hole by iron plate, then model is continued to be placed in the fog room of constant temperature and humidity, continue maintenance 24h, the glueing material added in this example is: white cement: water=3:1;
9) by good for maintenance 8) in model take out from fog room, then the model in mould is released, thus obtains the prismatic jointing strata model containing blind joint;
10) according to specific inter-laminar dislocation band feature (inclination angle, thickness, clipped position) by 9) model that obtains cuts, and obtains different blocks, what adopt inside this example be inclination angle is 45 °, thickness be 10mm clipped position in centre, as shown in Figure 3;
11) utilize different bindings by 10) in block be bonded together and make certain thickness filling, thus obtain the prismatic jointing strata model containing different blind joint and inter-laminar dislocation band, the binding that this example adopts is cement: water=3:1;
Embodiment 2
Difference from Example 1 content is as follows:
Step 2) in cast material be cement: sand: water=2:4:1;
In step 4), the thickness 1mm of iron plate;
Maintenance standing time of step 7) is 1h;
In step 8), maintenance standing time is 36h, and the binder of employing is epoxy resin;
In step 10), the feature of the inter-laminar dislocation band of employing is: inclination angle is 30 °, thickness is 15mm, and clipped position is in centre.
In step 11), the binding of employing adopts cement: water=2:1
Embodiment 3
Difference from Example 1 content is as follows:
Step 2) in cast material be cement: sand: water=2:3:1;
In step 4), the thickness 3mm of iron plate;
Maintenance standing time of step 7) is 1.5h;
In step 8), maintenance standing time is 48h, and the binder of employing is epoxy resin;
In step 10), the feature of the inter-laminar dislocation band of employing is two parallel inter-laminar dislocation band: inclination angle is 30 °, thickness is 15mm, is spaced apart 35mm, and two parallel inter-laminar dislocation band all run through shears centre position.
In step 11), the binding of employing adopts cement: water=2:1.
Below by reference to the accompanying drawings embodiments of the present invention are described in detail, but the present invention is not limited to described embodiment.For those of ordinary skill in the art, in the scope of principle of the present invention and technological thought, multiple change, amendment, replacement and change are carried out to these embodiments and still falls within the scope of protection of the present invention.
Claims (3)
1. prepare a method for the prismatic jointing strata model containing blind joint and inter-laminar dislocation band, it is characterized in that comprising the following steps:
Step 1, on-the-spot at column rock mass, get one group of cylinder and add up its shape, size and size;
Step 2, according to the shape of the replacement of statistic record, size and size, utilizes the geometric similarity of empirical model to compare C
1, unit weight ratio of similitude C
y, obtain rock mechanics parameters according to shop experiment, then strength similarity compares C
r=C
1× C
y, elastic modulus ratio of similitude C
e=C
1× C
y, and determine the concrete size of single replacement and the raw material of its different order of label record, analog material and proportioning with this;
Step 3, by the size and dimension of the single replacement finally determined by ratio of similitude in the shape of the cylinder added up at the scene in step 1, size and size and step 2, adopts iron plate split to be formed cellular, for the formation of strata model cylindrical joint;
Step 4, according to specific rule, oatmeal is processed into the fragment shape of different size, thickness, length according to the blind joint quantity of typical column body, mean breadth, average length, thus determines kind and the quantity of the fragment shape oatmeal adding different characteristic in modelling raw material;
Step 5, carries out uniform stirring by the ratio that analog material cement, sand and water are determined according to similarity criterion in step 2, and the fragment shape oatmeal in step 4 being obtained inserts wherein, after stirring again, pours in cube mold; Then be placed in the fog room of constant temperature and humidity, maintenance 1-2h;
Step 6, injects iron plate obtained for step 3 in the model after maintenance according to specific order, then continues model to be placed in the fog room of constant temperature and humidity, maintenance 1-2h;
Step 7, iron plate in the mould of the analog material of the band blind joint after maintenance in step 6 is extracted, then pour into glueing material filling and extract formed joint hole by iron plate, then continue model to be placed in the fog room of constant temperature and humidity, continue maintenance 24-48h;
Step 8, the model in the step 7 good by maintenance is taken out from fog room, is then released by the model in mould, obtains the prismatic jointing strata model containing blind joint;
Step 9, model step 8 obtained according to specific inter-laminar dislocation band feature cuts, and obtains different blocks;
Step 10, utilizes different bindings be bonded together by the block in step 9 and make certain thickness filling, obtains the prismatic jointing strata model containing different blind joint and inter-laminar dislocation band.
2. preparation according to claim 1 contains the method for the prismatic jointing strata model of blind joint and inter-laminar dislocation band, it is characterized in that: in described step 1, the characteristic information of the blind joint of column body is added up and record, and get rock sample that cylinder makes standard tests out it rock mechanics parameters through shop experiment.
3. preparation according to claim 1 contains the method for the prismatic jointing strata model of blind joint and inter-laminar dislocation band, it is characterized in that: in described step 9, specific inter-laminar dislocation band feature comprises inclination angle, thickness and clipped position.
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| CN106706393A (en) * | 2017-02-22 | 2017-05-24 | 河海大学 | Method for determining representative elementary volume (REV) of columnar jointed rock mass through similarity model |
| CN106769341A (en) * | 2017-03-09 | 2017-05-31 | 河海大学 | A kind of rocks sample preparation device and preparation method containing blind joint |
| CN106840800A (en) * | 2017-03-01 | 2017-06-13 | 河海大学 | A kind of rocks preparation method of sample containing polygonal Joint network simulation |
| CN107782578A (en) * | 2017-11-07 | 2018-03-09 | 中国科学院武汉岩土力学研究所 | A kind of in-situ sampling method of the rock mass containing disturbed belt |
| CN107817164A (en) * | 2017-11-27 | 2018-03-20 | 中国科学院武汉岩土力学研究所 | Simulate the indoor true triaxial test method of live changing of the relative positions band structure and stress state |
| CN110057639A (en) * | 2019-04-29 | 2019-07-26 | 河海大学 | A kind of sampling die and its method for making sample for simulating the rock mass of inter-laminar dislocation band containing multilayer |
| CN110146352A (en) * | 2019-04-19 | 2019-08-20 | 河海大学 | A kind of sampling die and preparation method for simulating disturbed belt rock mass |
| CN111157322A (en) * | 2020-01-19 | 2020-05-15 | 河海大学 | Preparation method of irregular columnar jointed rock mass sample of nested interlayer dislocation zone |
| CN111366427A (en) * | 2020-02-28 | 2020-07-03 | 河海大学 | Method for preparing columnar joint rock sample |
| CN112729984A (en) * | 2020-12-22 | 2021-04-30 | 华能煤炭技术研究有限公司 | Method and device for preparing multiple groups of cross jointed rock mass model test pieces |
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| CN106706393A (en) * | 2017-02-22 | 2017-05-24 | 河海大学 | Method for determining representative elementary volume (REV) of columnar jointed rock mass through similarity model |
| CN106840800A (en) * | 2017-03-01 | 2017-06-13 | 河海大学 | A kind of rocks preparation method of sample containing polygonal Joint network simulation |
| CN106840800B (en) * | 2017-03-01 | 2019-09-24 | 河海大学 | A kind of rocks preparation method of sample of the Joint network simulation containing polygonal |
| CN106769341A (en) * | 2017-03-09 | 2017-05-31 | 河海大学 | A kind of rocks sample preparation device and preparation method containing blind joint |
| CN106769341B (en) * | 2017-03-09 | 2019-03-12 | 河海大学 | A kind of rocks sample preparation device and preparation method containing blind joint |
| CN107782578A (en) * | 2017-11-07 | 2018-03-09 | 中国科学院武汉岩土力学研究所 | A kind of in-situ sampling method of the rock mass containing disturbed belt |
| CN107782578B (en) * | 2017-11-07 | 2019-07-23 | 中国科学院武汉岩土力学研究所 | A kind of in-situ sampling method of the rock mass containing disturbed belt |
| CN107817164A (en) * | 2017-11-27 | 2018-03-20 | 中国科学院武汉岩土力学研究所 | Simulate the indoor true triaxial test method of live changing of the relative positions band structure and stress state |
| CN107817164B (en) * | 2017-11-27 | 2019-07-12 | 中国科学院武汉岩土力学研究所 | Simulate the indoor true triaxial test method of live changing of the relative positions band structure and stress state |
| CN110146352B (en) * | 2019-04-19 | 2022-04-29 | 河海大学 | Sample preparation mold for simulating rock mass in disturbed belt and preparation method |
| CN110146352A (en) * | 2019-04-19 | 2019-08-20 | 河海大学 | A kind of sampling die and preparation method for simulating disturbed belt rock mass |
| CN110057639A (en) * | 2019-04-29 | 2019-07-26 | 河海大学 | A kind of sampling die and its method for making sample for simulating the rock mass of inter-laminar dislocation band containing multilayer |
| CN110057639B (en) * | 2019-04-29 | 2021-07-27 | 河海大学 | Sample preparation mold for simulating rock mass with multilayer interlayer dislocation zone and sample preparation method thereof |
| CN111157322A (en) * | 2020-01-19 | 2020-05-15 | 河海大学 | Preparation method of irregular columnar jointed rock mass sample of nested interlayer dislocation zone |
| CN111366427A (en) * | 2020-02-28 | 2020-07-03 | 河海大学 | Method for preparing columnar joint rock sample |
| CN111366427B (en) * | 2020-02-28 | 2023-04-07 | 河海大学 | Method for preparing columnar joint rock sample |
| CN112729984A (en) * | 2020-12-22 | 2021-04-30 | 华能煤炭技术研究有限公司 | Method and device for preparing multiple groups of cross jointed rock mass model test pieces |
| CN112729984B (en) * | 2020-12-22 | 2023-07-21 | 华能煤炭技术研究有限公司 | Method and device for preparing multi-group cross jointed rock mass model test pieces |
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