CN110987555B - Soft disturbed belt manual sample preparation device and method - Google Patents
Soft disturbed belt manual sample preparation device and method Download PDFInfo
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- CN110987555B CN110987555B CN201911124983.9A CN201911124983A CN110987555B CN 110987555 B CN110987555 B CN 110987555B CN 201911124983 A CN201911124983 A CN 201911124983A CN 110987555 B CN110987555 B CN 110987555B
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- 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
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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Abstract
The invention provides a soft dislocation zone manual sample preparation device and a method, wherein the soft dislocation zone manual sample preparation device comprises a pressure device and a filling chamber, an upper disc jointed rock body, a lower disc jointed rock body and filling materials filled in the inner space of the filling chamber are arranged in the filling chamber, a gas transmission pipe is arranged between the pressure device and the filling chamber, and a vent valve and a pressure gauge are sequentially arranged on the gas transmission pipe from one end of the pressure device to one end of the filling chamber. The method solves the problem that the initial rock sample is difficult to obtain due to excavation disturbance on site, can be used for manually manufacturing the soft interlayers with different thicknesses, different strengths and different roughness, realizes the test repeatable operability of the dislocation bands of different filling materials, saves the cost of site sampling and sample preparation, realizes the autonomous simulation of different filling materials, truly reflects the material composition and the mechanical property of the in-situ interlayer dislocation band on site to the maximum extent, and provides a reliable basis for the engineering safety evaluation.
Description
Technical Field
The invention relates to geotechnical engineering encountering a soft disturbed belt in underground engineering and slope engineering in the fields of water conservancy, hydropower, traffic and the like, in particular to an artificial sample preparation device and method for the soft disturbed belt.
Background
The interlaminar dislocation zone is a completely argillized interlayer which is loose in structure and weak in inter-granular connection and is sandwiched in a hard rock stratum, and is a permanent deformation trace which is left by the historical regional tectonic movement along a plurality of parallel weak layers in a stratified rock body under the shearing action and has different thicknesses and different intervals. Due to the wide distribution and the size which is far larger than the size of the rock engineering structure. Therefore, the rock engineering structure is often affected by the interbedded dislocation zone. The universality of the interbedded dislocation zone brings a great deal of rock instability and natural disasters to many countries in the world. For example, 11 interbedded dislocation zones are developed in the dam site area of the white crane beach hydropower station and the underground cavern group, the interbedded zones penetrate through the underground cavern groups of the left bank and the right bank, and the interbedded zones are poor in physical and mechanical properties and filled with soft and weak substances, so that after the large underground cavern group is excavated, the loose depth and large deformation area of rock mass are increased due to the dislocation of upper and lower plates of the interbedded zones, and the integral stability characteristic of the cavern is influenced.
The factors influencing the shearing mechanical property of the interlaminar dislocation zone are more, and mainly comprise the factors such as particle size, interlayer thickness, joint surface roughness, water content and normal force, and the factors influence the shearing mechanical property of the interlaminar dislocation zone to different degrees. Meanwhile, when a shearing mechanical test of the interlaminar dislocation band is carried out, the fact that the interlaminar dislocation band is interfered by various influence factors is found, the discreteness of test data is large, the shearing mechanical parameters of different interlaminar bands are difficult to obtain, even the interlaminar dislocation bands of the same group are different in properties, fillers and the like when different caverns are exposed, the deformation magnitude of the interlaminar dislocation bands can be greatly influenced by the change of the mechanical properties of the interlaminar dislocation bands, and therefore, the mechanical properties of the interlaminar dislocation bands made of different filling materials need to be researched.
Disclosure of Invention
The first purpose of the present invention is to provide a soft disturbed belt manual sample preparation device, which overcomes the shortcomings of the prior art.
Therefore, the above purpose of the invention is realized by the following technical scheme:
the utility model provides a soft dislocation area manual work system appearance device which characterized in that: the artificial sample preparation device for the weak dislocation zone comprises a pressure device and a filling chamber, wherein an upper disc joint rock body, a lower disc joint rock body and a filling material filled in the inner space of the filling chamber are arranged in the filling chamber, a gas conveying pipe is arranged between the pressure device and the filling chamber, and a vent valve and a pressure gauge are sequentially arranged on the gas conveying pipe from one end of the pressure device to one end of the filling chamber.
While adopting the technical scheme, the invention can also adopt or combine the following technical scheme:
as a preferred technical scheme of the invention: the pressure device is a gas storage bottle.
As a preferred technical scheme of the invention: the filling chamber comprises a steel plate and a bolt, and the steel plate and the bolt form a closed space of the filling chamber.
As a preferred technical scheme of the invention: the junction of steel sheet is equipped with and fills silica gel in order to guarantee to fill indoor atmospheric pressure seal.
The invention also aims to provide a method for manually preparing a sample of a weak disturbed belt, aiming at the defects in the prior art.
For this reason, the above object of the present invention is achieved by the following technical solutions:
a soft disturbed belt artificial sample preparation method is characterized by comprising the following steps: the soft disturbed belt artificial sample preparation method is based on the soft disturbed belt artificial sample preparation device and comprises the following steps:
(1) sampling
Selecting a part with good construction conditions and rock mass conditions for drilling and coring, wherein in the drilling process of a small-sized water drilling machine or a heavy geological drilling machine, because a drilling barrel and a rock mass generate heat through friction, water needs to be continuously added for cooling and lubricating, a rock sample in the drilling barrel rotates and disturbs in the water adding process, weak fillers in the rock sample are washed away, and only upper and lower disc jointed rock masses and mud chips are left finally;
after the rock sample is taken out, washing mud chips in the rock sample by using a high-pressure water gun, and separating the upper and lower jointed rock bodies;
the sample size is 150 mm x 150 mm and these rock samples are preferably taken from the same location to ensure uniformity of mechanical properties; in addition, the rock sample is also preferably taken from the vicinity of the tunnel face to ensure that it is not affected by weathering;
(2) sample preparation
The pressure device is a gas storage bottle filled with compressed nitrogen, and can provide stable air pressure in the filling process so as to ensure the filling compactness;
the filling material is mainly prepared by cement and water according to a certain proportion, and the strength grade and the proportion of the cement are mainly prepared according to the argillization degree of filling substances in the site interlaminar dislocation zone; the strength of the cement adopted in the embodiment is 42.5 MPa, and the water is respectively prepared according to the proportion of 0.5:1, 0.6:1 and 0.7: 1;
filling materials are firstly required to be completely stirred in a stirrer, then the lower disc jointed rock mass is placed into a filling chamber, the filling materials are injected into the filling chamber, the upper disc jointed rock mass is placed when the filling materials submerge the lower disc jointed rock mass and reach a preset height, and then the filling materials are continuously poured until the upper disc jointed rock mass is submerged;
a steel plate and a bolt are adopted to seal the filling chamber, a vent valve is opened, high-pressure gas is injected into the filling chamber, so that filling materials enter a pore between the upper disc and the lower disc, and the effect of further compacting is achieved; in the process, the pressure is kept at 0.5-1 MPa for about 0.5-1 hour;
after filling, taking out the sample, and maintaining for 28 days;
because the interlaminar dislocation band mainly inspects the shearing mechanical characteristics, the shearing damage mainly occurs in the weak filling materials, after the shearing damage, the upper and lower disc jointed rock bodies can be continuously utilized for re-filling, and the implementation steps are repeated, so that the dislocation bands made of different filling materials can be realized, and the requirements of test tests can be met.
The invention provides a device and a method for manually preparing a sample of a weak dislocation band, which solve the problem that an initial rock sample is difficult to obtain due to excavation disturbance on site, can manually prepare weak interlayers with different thicknesses, different strengths and different roughness, realize the repeatable operability of tests of different filling material dislocation bands, save the cost of site sampling and sample preparation, realize the autonomous simulation of different filling materials, truly reflect the material composition and the mechanical property of the in-situ interlayer dislocation band on site to the maximum extent, and provide a reliable basis for engineering safety evaluation.
Drawings
Fig. 1 is a schematic diagram of an artificial sample preparation device for a soft disturbed belt provided by the present invention;
in the figure: 1-a pressure device; 2-a filling chamber; 201-steel plate; 202-bolt; 3-a gas conveying pipe; 301-a vent valve; 302-pressure gauge; 401-hanging the jointed rock mass; 402-footwall jointed rock mass; 403-filling material.
Detailed Description
The invention is described in further detail with reference to the figures and specific embodiments.
A soft disturbed belt manual sample preparation device comprises a pressure device 1 and a filling chamber 2, wherein an upper disc jointed rock body 401, a lower disc jointed rock body 402 and filling materials 403 filled in the inner space of the filling chamber 2 are arranged in the filling chamber 2, a gas transmission pipe 3 is arranged between the pressure device 1 and the filling chamber 2, and a vent valve 301 and a pressure gauge 302 are sequentially arranged on the gas transmission pipe 3 from one end of the pressure device 1 to one end of the filling chamber 2.
In the present embodiment, the pressure device 1 is a gas cylinder filled with compressed nitrogen.
In the present embodiment, the filling chamber 2 includes a steel plate 201 and bolts 202, and the steel plate 201 and the bolts 202 form a closed space of the filling chamber 2.
In this embodiment, the joint of the steel plate 201 is provided with a filling silica gel to ensure the air pressure tightness in the filling chamber 2.
The soft disturbed belt artificial sample preparation method is based on the soft disturbed belt artificial sample preparation device and comprises the following steps:
(1) sampling
Selecting a part with good construction conditions and rock mass conditions for drilling and coring, wherein in the drilling process of a small-sized water drilling machine or a heavy geological drilling machine, because a drilling barrel and a rock mass generate heat through friction, water needs to be continuously added for cooling and lubricating, a rock sample in the drilling barrel rotates and disturbs in the water adding process, weak fillers in the rock sample are washed away, and only upper and lower disc jointed rock masses and mud chips are left finally;
after the rock sample is taken out, washing mud chips in the rock sample by using a high-pressure water gun to separate the upper and lower jointed rock bodies;
the sample size is 150 mm x 150 mm and these rock samples are preferably taken from the same location to ensure uniformity of mechanical properties; in addition, the rock sample is also preferably taken from the vicinity of the tunnel face to ensure that it is not affected by weathering;
(2) sample preparation
The pressure device is a gas storage bottle filled with compressed nitrogen, and can provide stable air pressure in the filling process so as to ensure the filling compactness;
the filling material is mainly prepared by cement and water according to a certain proportion, and the strength grade and the proportion of the cement are mainly prepared according to the argillization degree of filling substances in the site interlaminar dislocation zone; the strength of the cement adopted in the embodiment is 42.5 MPa, and the water is respectively prepared according to the proportion of 0.5:1, 0.6:1 and 0.7: 1;
filling materials are firstly required to be completely stirred in a stirrer, then the lower disc jointed rock mass is placed into a filling chamber, the filling materials are injected into the filling chamber, the upper disc jointed rock mass is placed when the filling materials submerge the lower disc jointed rock mass and reach a preset height, and then the filling materials are continuously poured until the upper disc jointed rock mass is submerged;
a steel plate and a bolt are adopted to seal the filling chamber, a vent valve is opened, high-pressure gas is injected into the filling chamber, so that filling materials enter a pore between the upper disc and the lower disc, and the effect of further compacting is achieved; in the process, the pressure is kept at 0.5-1 MPa for about 0.5-1 hour;
after filling, taking out the sample, and maintaining for 28 days;
because the interlaminar dislocation band mainly inspects the shearing mechanical characteristics, the shearing damage mainly occurs in the weak filling materials, after the shearing damage, the upper and lower disc jointed rock bodies can be continuously utilized for re-filling, and the implementation steps are repeated, so that the dislocation bands made of different filling materials can be realized, and the requirements of test tests can be met.
The invention provides a device and a method for manually preparing a sample of a weak dislocation band, which solve the problem that an initial rock sample is difficult to obtain due to excavation disturbance on site, can manually prepare weak interlayers with different thicknesses, different strengths and different roughness, realize the repeatable operability of tests of different filling material dislocation bands, save the cost of site sampling and sample preparation, realize the autonomous simulation of different filling materials, truly reflect the material composition and the mechanical property of the in-situ interlayer dislocation band on site to the maximum extent, and provide a reliable basis for engineering safety evaluation.
The above-described embodiments are intended to illustrate the present invention, but not to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit of the present invention and the scope of the claims fall within the scope of the present invention.
Claims (4)
1. The utility model provides a soft dislocation area manual work system appearance device which characterized in that: the soft dislocation belt manual sample preparation device comprises a pressure device and a filling chamber, wherein an upper disc jointed rock mass, a lower disc jointed rock mass and a filling material filled in the inner space of the filling chamber are arranged in the filling chamber, a gas pipe is arranged between the pressure device and the filling chamber, and a vent valve and a pressure gauge are sequentially arranged on the gas pipe from one end of the pressure device to one end of the filling chamber;
the filling chamber comprises a steel plate and a bolt, and the steel plate and the bolt form a closed space of the filling chamber.
2. The soft disturbed belt artificial sample preparation device according to claim 1, characterized in that: the pressure device is a gas storage bottle.
3. The soft disturbed belt artificial sample preparation device according to claim 1, characterized in that: the junction of steel sheet is equipped with and fills silica gel in order to guarantee to fill indoor atmospheric pressure seal.
4. A soft disturbed belt artificial sample preparation method is characterized by comprising the following steps: the soft disturbed belt artificial sample preparation method is based on the soft disturbed belt artificial sample preparation device of any one of claims 1 to 3 and comprises the following steps:
(1) sampling
Selecting a part with good construction conditions and rock mass conditions for drilling and coring, wherein in the drilling process of a small-sized water drilling machine or a heavy geological drilling machine, because a drilling barrel and a rock mass generate heat through friction, water needs to be continuously added for cooling and lubricating, a rock sample in the drilling barrel rotates and disturbs in the water adding process, weak fillers in the rock sample are washed away, and only upper and lower disc jointed rock masses and mud chips are left finally;
after the rock sample is taken out, washing mud chips in the rock sample by using a high-pressure water gun to separate the upper and lower jointed rock bodies;
the specimen size was 150 mm x 150 mm and the rock samples were taken from the same location to ensure uniformity of mechanical properties; in addition, the rock sample is taken from the vicinity of the tunnel face, so that the rock sample is not influenced by weathering;
(2) sample preparation
The pressure device is a gas storage bottle filled with compressed nitrogen, and can provide stable air pressure in the filling process so as to ensure the filling compactness;
the filling material is mainly prepared by cement and water according to a certain proportion, and the strength grade and the proportion of the cement are mainly prepared according to the argillization degree of filling substances in the site interlaminar dislocation zone;
filling materials are firstly required to be completely stirred in a stirrer, then the lower disc jointed rock mass is placed into a filling chamber, the filling materials are injected into the filling chamber, the upper disc jointed rock mass is placed when the filling materials submerge the lower disc jointed rock mass and reach a preset height, and then the filling materials are continuously poured until the upper disc jointed rock mass is submerged;
a steel plate and a bolt are adopted to seal the filling chamber, a vent valve is opened, high-pressure gas is injected into the filling chamber, so that filling materials enter a pore between the upper disc and the lower disc, and the effect of further compacting is achieved; in the process, the pressure is kept at 0.5-1 MPa for 0.5-1 hour;
after filling, taking out the sample, and maintaining for 28 days;
because the interlaminar dislocation band mainly inspects the shearing mechanical characteristics, the shearing damage mainly occurs in the weak filling materials, after the shearing damage, the upper and lower disc jointed rock bodies are continuously utilized to be refilled, the implementation steps are repeated, the dislocation bands made of different filling materials are realized, and the requirements of test tests are met.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983490A (en) * | 2014-05-26 | 2014-08-13 | 中国科学院武汉岩土力学研究所 | Preparation method of disturbed belt sample for reflecting stress state of primary rock |
| CN104777016A (en) * | 2015-01-14 | 2015-07-15 | 南京工业大学 | Slurry consolidating sample production apparatus and use method thereof |
| CN106042160A (en) * | 2016-05-18 | 2016-10-26 | 中国地质大学（武汉） | Variable-temperature variable-pressure curing device for well cementing slurry test mold |
| CN106092695A (en) * | 2016-08-05 | 2016-11-09 | 湖南科技大学 | A kind of rock-like materials structural plane is produced and for the device and method of shearing test |
| CN109507024A (en) * | 2018-10-16 | 2019-03-22 | 浙江科技学院 | A kind of structural plane production and staight scissors test method containing weak intercalated layer |
| CN211477787U (en) * | 2019-11-18 | 2020-09-11 | 中国电建集团华东勘测设计研究院有限公司 | Soft disturbed belt manual sample preparation device |
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- 2019-11-18 CN CN201911124983.9A patent/CN110987555B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983490A (en) * | 2014-05-26 | 2014-08-13 | 中国科学院武汉岩土力学研究所 | Preparation method of disturbed belt sample for reflecting stress state of primary rock |
| CN104777016A (en) * | 2015-01-14 | 2015-07-15 | 南京工业大学 | Slurry consolidating sample production apparatus and use method thereof |
| CN106042160A (en) * | 2016-05-18 | 2016-10-26 | 中国地质大学（武汉） | Variable-temperature variable-pressure curing device for well cementing slurry test mold |
| CN106092695A (en) * | 2016-08-05 | 2016-11-09 | 湖南科技大学 | A kind of rock-like materials structural plane is produced and for the device and method of shearing test |
| CN109507024A (en) * | 2018-10-16 | 2019-03-22 | 浙江科技学院 | A kind of structural plane production and staight scissors test method containing weak intercalated layer |
| CN211477787U (en) * | 2019-11-18 | 2020-09-11 | 中国电建集团华东勘测设计研究院有限公司 | Soft disturbed belt manual sample preparation device |
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