CN113358407A - Sampling method for multi-face empty rock structural face - Google Patents
Sampling method for multi-face empty rock structural face Download PDFInfo
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- CN113358407A CN113358407A CN202110774700.6A CN202110774700A CN113358407A CN 113358407 A CN113358407 A CN 113358407A CN 202110774700 A CN202110774700 A CN 202110774700A CN 113358407 A CN113358407 A CN 113358407A
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- 238000005070 sampling Methods 0.000 title claims abstract description 41
- 239000011435 rock Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005553 drilling Methods 0.000 claims abstract description 30
- 239000002689 soil Substances 0.000 claims abstract description 6
- 239000011800 void material Substances 0.000 claims 6
- 238000012360 testing method Methods 0.000 abstract description 29
- 238000005520 cutting process Methods 0.000 abstract description 9
- 238000011065 in-situ storage Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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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
-
- 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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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a sampling method for a rock structural surface with multiple faces facing empty; and after the residual structural surface forms the empty facing surface in a drilling mode, taking out the target sampling soil block. The invention can quickly obtain the undisturbed structural surface sample for indoor test without time-consuming and expensive field in-situ test, and can control the size of the structural surface sample by selecting different drilling tools; the handheld drilling machine is used for cutting in the operation process, vibration in the cutting process is small, interference on a test piece is small, and a undisturbed test piece is favorably prepared and is very important for obtaining natural mechanical parameters of a structural surface; the equipment is simple, the operation is simple and convenient, and the field implementation is facilitated.
Description
Technical Field
The invention relates to a sampling method for a rock structural surface with multiple faces empty.
Background
The mechanical test parameters of the rock structural surface, particularly the shear strength parameters, are important for the anti-sliding stability of buildings, side slopes, foundations and the like. Thus, engineers have been working to obtain reasonable shear strength parameters of structural surfaces to evaluate the strength of geotechnical bodies. At present, the method for acquiring the shear strength parameter of the rock structural surface mainly adopts a large-scale on-site in-situ shear test, or a structural surface sample is taken back indoors for an indoor test. However, the use of large in-situ shearing in the field often requires excavation of test footrills, or the test site is difficult to reach, which makes the test work extremely difficult, resulting in long test period and high cost. The sampling of the rock mass structural plane is often required to be kept undisturbed. However, the rock mass structural plane is easy to disturb and destroy the original structural system in the sampling operation, so that the sampling of the original rock mass structural plane is difficult, and even the sampling fails. Particularly, in the test of the rock mass structural plane, the test simulation needs to be carried out aiming at the in-situ stress direction of the structural plane, so that the extremely high requirement is provided for the sampling of the rock mass structural plane.
The methods currently used for sampling on-site rock structural surfaces are mainly manual sampling and mechanical sampling methods. Manual sampling is performed manually by using tools such as a hammer, a chisel, a small cutter and the like, an operator hammers the chisel through the hammer, and the chisel strips a small rock body to be sampled from a large rock body. Adopt this mode to appear causing the rock mass to produce great vibrations in the hammering in-process easily, destroy the rock mass especially the original structure of structural plane, lead to the original rock mass to sample the failure. The labor intensity of manually hammering the rock mass is high, and the sampling efficiency is low. The mechanical sampling method mainly adopts machinery to perform operations such as cutting, drilling and the like on rocks, for example, the CN202022341495.8 patent adopts an electric sampling device for accurately obtaining a rock structural plane to perform positioning sampling, and the CN201720841006.0 patent adopts an intelligent device for rapidly cutting an outdoor original rock structural plane with multiple working planes to perform cutting sampling. But the former can only drill a cylindrical sample, and the size of the obtained sample is small and cannot reflect the shearing characteristics of the structural surface. The latter cutting machine with a transmission system can only cut three faces of a rock body for cutting and sampling, and the system is too complex and is not beneficial to field implementation.
Disclosure of Invention
In order to solve the technical problems, the invention provides a sampling method for a multi-faced empty rock structural surface, which can quickly obtain an undisturbed structural surface sample for indoor test without performing a time-consuming and expensive field in-situ test.
The invention is realized by the following technical scheme.
The invention provides a sampling method for a rock structural surface with multiple faces facing empty; and after the residual structural surface forms the empty facing surface in a drilling mode, taking out the target sampling soil block.
The target sampling soil block is a cube.
Two adjacent free surfaces are provided.
The number of the residual structural surfaces is four.
In the drilling mode, drilling is carried out in a mode of sampling and overlapping adjacent drill holes.
The drilling is performed by the electric handheld drilling machine.
In the process of forming the facing hollow surface, every time, the forming is carried out along the adjacent structural surface of the facing hollow surface.
The invention has the beneficial effects that: the undisturbed structural surface sample can be rapidly obtained for indoor test, time-consuming and expensive field in-situ test is not needed, and the size of the structural surface sample can be controlled by selecting different drilling tools; the handheld drilling machine is used for cutting in the operation process, vibration in the cutting process is small, interference on a test piece is small, and a undisturbed test piece is favorably prepared and is very important for obtaining natural mechanical parameters of a structural surface; the equipment is simple, the operation is simple and convenient, and the field implementation is facilitated.
Drawings
FIG. 1 is a schematic diagram of the structure of at least one embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
Example 1
The invention provides a sampling method for a rock structural surface with multiple faces facing empty; and after the residual structural surface forms the empty facing surface in a drilling mode, taking out the target sampling soil block.
Example 2
Based on example 1, and the target sample clods were cubes.
Example 3
Based on example 1, and there are two adjacent blank surfaces.
Example 4
Based on example 1, and the remaining structural planes are four.
Example 5
Based on the embodiment 1, in the drilling mode, the adjacent drilling holes are drilled in a mode of sampling and overlapping.
Example 6
Based on example 1, and the drilling sampling was performed with an electric hand-held drill.
Example 7
Based on the embodiment 1, in the process of forming the facing hollow surfaces, the process is carried out along the adjacent structural surfaces of the facing hollow surfaces each time.
Example 8
Based on the above embodiments, in particular, the method samples a rock structure face having two adjacent face faces. For convenience of laboratory testing, the samples were taken in the general form of cubes. The cube has six faces, and for the structural plane that has two adjacent face vacant faces, need form other four face vacant faces again to cut apart target test piece and surrounding rock mass.
In order to form other four free surfaces without generating larger disturbance to a target structural surface test piece, the invention adopts a drilling mode of an electric hand-held drilling machine to segment the test piece. As shown in fig. 1, three division surfaces are planned on one of the adjacent empty surfaces, a drilling machine is used for drilling along the direction vertical to the structural surface, the drilling depth of the drilling machine exceeds the thickness of the upper rock of the structural surface until the drilling depth reaches a certain depth in the lower rock, and the specific depth can be determined according to the scale of the structural surface and the size of a drill bit. And continuously drilling adjacent drilled holes in an overlapping mode until a continuous free face is formed to separate the structural surface test piece from the rock mass on one side. And separating the rest two surfaces in the same way to form three blank surfaces.
The target structural surface test piece has five blank faces, and the sixth blank face is required to be formed to separate the test piece from the in-situ rock body completely. And drilling from the second natural face along the direction parallel to the structural plane by using a handheld drilling machine in the manner described above until a communicated face is formed to completely separate the target test piece from the surrounding rock mass. And carefully taking out the hexahedral structural surface test piece from the original position to obtain the hexahedral rock structural surface test piece. At this point, the sampling process using this sampling method is ended.
Claims (7)
1. A sampling method for a rock structural surface with multiple faces being empty is characterized in that: and after the residual structural surface forms the empty facing surface in a drilling mode, taking out the target sampling soil block.
2. A method of sampling a rock structure face for multiple faces void according to claim 1, wherein: the target sampling soil block is a cube.
3. A method of sampling a rock structure face for multiple faces void according to claim 1, wherein: two adjacent free surfaces are provided.
4. A method of sampling a rock structure face for multiple faces void according to claim 1, wherein: the number of the residual structural surfaces is four.
5. A method of sampling a rock structure face for multiple faces void according to claim 1, wherein: in the drilling mode, drilling is carried out in a mode of sampling and overlapping adjacent drill holes.
6. A method of sampling a rock structure face for multiple faces void according to claim 1, wherein: the drilling is performed by the electric handheld drilling machine.
7. A method of sampling a rock structure face for multiple faces void according to claim 1, wherein: in the process of forming the facing hollow surface, every time, the forming is carried out along the adjacent structural surface of the facing hollow surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110774700.6A CN113358407A (en) | 2021-07-08 | 2021-07-08 | Sampling method for multi-face empty rock structural face |
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|---|---|---|---|
| CN202110774700.6A CN113358407A (en) | 2021-07-08 | 2021-07-08 | Sampling method for multi-face empty rock structural face |
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| Publication Number | Publication Date |
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| CN113358407A true CN113358407A (en) | 2021-09-07 |
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| CN202110774700.6A Pending CN113358407A (en) | 2021-07-08 | 2021-07-08 | Sampling method for multi-face empty rock structural face |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776926A (en) * | 2021-10-19 | 2021-12-10 | 中国电建集团成都勘测设计研究院有限公司 | Testing device and method for rock on face of empty surface under confining pressure-temperature-water coupling effect |
| CN115931508A (en) * | 2022-12-28 | 2023-04-07 | 中国长江三峡集团有限公司 | Method and device for acquiring real performance and spatial distribution of dam concrete |
| CN115931421A (en) * | 2022-12-28 | 2023-04-07 | 中国长江三峡集团有限公司 | Method and device for obtaining undisturbed sample of dam concrete and electronic equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776926A (en) * | 2021-10-19 | 2021-12-10 | 中国电建集团成都勘测设计研究院有限公司 | Testing device and method for rock on face of empty surface under confining pressure-temperature-water coupling effect |
| CN113776926B (en) * | 2021-10-19 | 2023-04-28 | 中国电建集团成都勘测设计研究院有限公司 | Test device and method for free face rock under confining pressure-temperature-water coupling effect |
| CN115931508A (en) * | 2022-12-28 | 2023-04-07 | 中国长江三峡集团有限公司 | Method and device for acquiring real performance and spatial distribution of dam concrete |
| CN115931421A (en) * | 2022-12-28 | 2023-04-07 | 中国长江三峡集团有限公司 | Method and device for obtaining undisturbed sample of dam concrete and electronic equipment |
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Application publication date: 20210907 |