CN111474026A - Manual manufacturing method of mudstone standard test piece - Google Patents
Manual manufacturing method of mudstone standard test piece Download PDFInfo
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- CN111474026A CN111474026A CN202010345737.2A CN202010345737A CN111474026A CN 111474026 A CN111474026 A CN 111474026A CN 202010345737 A CN202010345737 A CN 202010345737A CN 111474026 A CN111474026 A CN 111474026A
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- test piece
- mudstone
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- 238000012360 testing method Methods 0.000 title claims abstract description 98
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000011435 rock Substances 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000005498 polishing Methods 0.000 claims abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 244000137852 Petrea volubilis Species 0.000 claims description 11
- 238000002474 experimental method Methods 0.000 abstract description 3
- 239000002689 soil Substances 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 8
- 241001391944 Commicarpus scandens Species 0.000 description 5
- 238000000227 grinding Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000112 cooling gas Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000005224 forefinger Anatomy 0.000 description 1
- 210000004247 hand Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 210000003813 thumb Anatomy 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
- G01N1/28—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
-
- 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
- G01N1/32—Polishing; Etching
-
- 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
- G01N2001/2873—Cutting or cleaving
-
- 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
- G01N2001/2893—Preparing calibration standards
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a manual manufacturing method of a mudstone standard test piece, belonging to the technical field of rock-soil mechanics experiments and comprising the following steps: a. cutting out the rock core according to the length; b. sawing the cylindrical core into an octagonal prism; c. sanding with abrasive paper; d. polishing the outer surface; e. and (5) polishing the two bottom surfaces. The method does not need too many devices, can manufacture the test piece at any time, can well control the size of the test piece, and can manufacture standard test pieces with different sizes according to different test requirements. The method does not need too many devices, can manufacture the test piece at any time, can well control the size of the test piece, and can manufacture standard test pieces with different sizes according to different test requirements.
Description
Technical Field
The invention belongs to the technical field of geotechnical experiments, and particularly relates to a manual manufacturing method of a mudstone standard test piece.
Background
In the industries of geological exploration, civil construction, mining industry, water conservancy and the like, a plurality of geotechnical engineering scientific research projects are provided, and the research of the scientific research projects cannot leave a large number of rock mechanical tests in a laboratory. Before the experiment, firstly, the rock blocks retrieved from the site need to be processed into rock test pieces meeting the national standard. Due to the difficulty in on-site sampling, the processing quantity of the test pieces meeting the conditions is insufficient. After the rock is taken back, a series of rock-soil mechanical tests cannot be carried out because the rock cannot be processed into standard test pieces, and related physical mechanical characteristic parameters cannot be obtained, so that scientific researchers cannot carry out a series of test researches on the rock.
The current research situation of the manufacturing method of the domestic related rock test piece is as follows:
1. in the patent of a method for manufacturing a shale sample (patent number is CN 103712821A), it is mentioned that the problem of drill bit heating cannot be solved although mud chips can be well controlled to timely remove a drill bit when an inverted drilling machine is used for drilling the shale, and when the drill bit generates heat, the rock sample can be heated and expanded, so that the rock sample is jammed in the drill bit and cannot be timely taken out, and even the rock sample cracks.
2. In the patent of 'device for taking rock sample by mudstone cooling gas and method for taking rock sample' (patent number CN101975038B), a cooling gas device is used for cooling a drill bit and the rock sample and discharging mud scraps in time, but the device is stopped to cool the drill bit and clean the rock scraps when drilling for 3mm-5mm, and once the device is stopped and starts again in the process of drilling the rock sample, the rock sample is easy to break.
3. In the patent of a soft rock coring device (patent number CN 204373941U), the problems of drill bit heating and rock debris are well solved through an internal air type cooling system and an external air type dust suction system, but the device is complex in operation, and soft rock, particularly mudstone, is easy to break when drilled by a mechanical drilling machine, so that the original structure is damaged.
4. In the patent of the device for preparing the shale rock test piece and the preparation method thereof (patent number CN104849120A), three sections of threads are arranged in the used conical reducing grinding barrel, when a rock sample is drilled, rock debris is heated and can be attached to the threads on the inner wall of the conical reducing barrel, so that the grinding barrel cannot work normally, and the rock debris in the threads needs to be cleaned continuously in the drilling process. And the device has more components and complicated operation.
The preparation of a mudstone test piece is an essential step of a rock mechanics test, most rock test pieces can be successfully processed by using a general sample preparation process, but for mudstones which are low in strength, easy to break and easy to disintegrate when meeting water, the mudstone test pieces can be hardly processed into the test pieces meeting the standard, taking the test pieces with the processing specification of phi 50mm × 100mm as an example, the general rocks are often processed into the standard test pieces by using a drilling machine, and the drilling machine is cooled by water or wind.
Disclosure of Invention
The invention aims to overcome the defects in the background technology and provides a manual manufacturing method of a mudstone standard test piece. The manual mudstone manufacturing method adopts a processing method of cutting by a steel saw and polishing a mudstone standard sample by surface sand paper, and can prepare a mudstone standard test piece meeting the test requirements.
The technical scheme adopted for realizing the technical purpose is as follows:
a manual manufacturing method of a mudstone standard test piece comprises the following steps:
a. transversely fixing the taken core on a vice, and cutting out a 105 mm-long core by using a hacksaw;
b. vertically fixing the cut rock core on a vice, drawing a circle with the diameter of 50mm on the bottom surface of the rock core by using compasses, drawing a circular externally-tangent regular octagon by using a steel ruler, and sawing off rock samples except the regular octagon by using a steel saw along the edge of the regular octagon until the cylindrical rock core is sawn into an octagon;
c. putting the sawn octagonal prism test piece on sand paper for polishing until the prism is polished smoothly;
d. laying sand paper on the inner side of a semicircular steel pipe sleeve, placing an octagonal prism test piece which is polished smoothly into the pipe sleeve, and measuring the diameter of the test piece in time through up-down friction and left-right rotation friction until the outer surface of the test piece is smooth, wherein the diameter of the test piece is controlled to be 50 +/-0.5 mm;
e. fixing one end of a test piece which is ground smoothly on an omega-shaped clamp, keeping the bottom end of the test piece and the bottom end of the clamp in the same plane, controlling a screw to enable the clamp to clamp the test piece, polishing the bottom end of the test piece on sand paper by using a handheld clamp, and measuring the length of the test piece in time to enable the length to be controlled to be 100 +/-0.5 mm until two bottom surfaces of the test piece are flat, wherein the prepared test piece is a standard test piece with phi 50mm and × 100 mm.
Further, the saw blade for the hacksaw described in the steps a and b is an 18-tooth saw blade.
Further, the sandpaper used in steps c, d and e is 80# sandpaper.
Furthermore, the semicircular steel pipe sleeve in the step d is determined according to the size of the required standard test piece.
And furthermore, the omega-shaped clamp in the step e is determined according to the size of the required standard test piece.
Compared with the prior art, the invention has the following advantages:
the method is suitable for preparing the test piece of the mudstone which is easy to break and can be disintegrated by swelling in water, the overall method is simple, the processing process is easy to operate, the used materials are common, the used tools are easy to purchase or customize, the test piece grinding tool can be repeatedly used, the cost is low, and the practicability is high; the manual grinding of the mudstone can well reduce the intensity interference on the mudstone test piece, especially the mudstone which already contains cracks, ensure the original physical and mechanical properties of the mudstone test piece to a great extent, and solve the defect that the mudstone is easy to break under the original processing method; the method does not need too many devices, can manufacture the test piece at any time, can well control the size of the test piece, and can manufacture standard test pieces with different sizes according to different test requirements.
Drawings
FIG. 1 is a schematic view of a semicircular steel pipe casing according to the method of the present invention.
FIG. 2 is a schematic view of the structure of an omega-shaped jig in the method of the present invention.
Detailed Description
Example 1
1. Cutting a mudstone test piece sample:
a. transversely placing a mudstone sample obtained from a construction site on a vice, and fastening the acting force direction of the mudstone to be vertical to the bedding or crack surface of the mudstone so as to prevent the mudstone from cracking from the bedding or crack surface after being stressed;
b. cutting the mudstone test piece by a hacksaw for 110mm, and when the mudstone test piece is cut by holding the hacksaw by hand, timely rotating the test piece to cut the mudstone test piece from multiple directions (not less than 4) to the center in order to ensure that the cutting surface is vertical to the axis of the test piece;
c. vertically fixing the cut rock core on a vice, drawing a circle with the diameter of 50mm on the upper bottom surface of the rock core by using compasses, drawing a round externally-tangent regular octagon by using a steel ruler, and sawing off rock samples except the square by using a steel saw along the edge of the regular octagon until the cylindrical rock core is formed into an octagon;
d. the hacksaw blade should be changed in time, avoids hacksaw sawtooth to the surface cutting unevenness of mudstone test piece after the passivation.
2. Polishing the surface of a mudstone test piece sample:
a. holding the ground octagonal prism by two hands, placing the test piece on sand paper, and grinding until the eight prisms are ground to be smooth, so that the test piece is in a cylindrical shape preliminarily;
b. placing abrasive paper on the inner side of a semicircular steel pipe sleeve 1, and placing a test piece with a cylindrical shape in the pipe sleeve;
c. clamping a test piece by a forefinger and a thumb of one hand, controlling the vertical friction and the left-right rotation friction of the test piece in the steel pipe sleeve, and measuring the diameter of the test piece in time to control the diameter of the test piece to be 50 +/-0.5 mm until the outer surface of the test piece is smooth;
d. sand paper in the steel pipe sleeve should be changed in time, pay attention to sand paper grade, and sand paper roughness is difficult too big to influence the test piece surface smoothness.
3. Polishing the bottom surface of a mudstone test piece sample:
a. clamping the lower end of a test piece with a ground and smooth surface by using an omega-shaped clamp 2;
b. keeping the bottom end of the test piece and the bottom end of the clamp in the same plane, and properly controlling the screw to enable the clamp to clamp the test piece;
c. polishing the bottom end of the test piece on abrasive paper by using a handheld clamp, and measuring the length of the test piece in time, wherein the length is controlled to be 100 +/-0.5 mm;
d. the test pieces obtained at this time are standard 50 × 100mm standard test pieces.
Claims (5)
1. A manual manufacturing method of a mudstone standard test piece is characterized by comprising the following steps:
a. transversely fixing the taken core on a vice, and cutting out a 105 mm-long core by using a hacksaw;
b. vertically fixing the cut rock core on a vice, drawing a circle with the diameter of 50mm on the bottom surface of the rock core by using compasses, drawing a circular externally-tangent regular octagon by using a steel ruler, and sawing off rock samples except the regular octagon by using a steel saw along the edge of the regular octagon until the cylindrical rock core is sawn into an octagon;
c. putting the sawn octagonal prism test piece on sand paper for polishing until the prism is polished smoothly;
d. laying sand paper on the inner side of a semicircular steel pipe sleeve, placing an octagonal prism test piece which is polished smoothly into the pipe sleeve, and measuring the diameter of the test piece in time through up-down friction and left-right rotation friction until the outer surface of the test piece is smooth, wherein the diameter of the test piece is controlled to be 50 +/-0.5 mm;
e. fixing one end of a test piece which is ground smoothly on an omega-shaped clamp, keeping the bottom end of the test piece and the bottom end of the clamp in the same plane, controlling a screw to enable the clamp to clamp the test piece, polishing the bottom end of the test piece on sand paper by using a handheld clamp, and measuring the length of the test piece in time to enable the length to be controlled to be 100 +/-0.5 mm until two bottom surfaces of the test piece are flat, wherein the prepared test piece is a standard test piece with phi 50mm and × 100 mm.
2. The method of claim 1, wherein the hacksaw blade of each of the steps a and b is an 18-tooth saw blade.
3. The method for manually making a mudstone standard test piece according to claim 1, wherein the sandpaper used in steps c, d and e is 80# sandpaper.
4. The manual manufacturing method of the mudstone standard test piece according to claim 1, wherein the semicircular steel pipe sleeve in the step d is determined according to the size of the required standard test piece.
5. The manual manufacturing method of the mudstone standard test piece as claimed in claim 1, wherein the omega-shaped clamp in the step e is determined according to the size of the required standard test piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010345737.2A CN111474026A (en) | 2020-04-27 | 2020-04-27 | Manual manufacturing method of mudstone standard test piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010345737.2A CN111474026A (en) | 2020-04-27 | 2020-04-27 | Manual manufacturing method of mudstone standard test piece |
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| Publication Number | Publication Date |
|---|---|
| CN111474026A true CN111474026A (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010345737.2A Pending CN111474026A (en) | 2020-04-27 | 2020-04-27 | Manual manufacturing method of mudstone standard test piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514313A (en) * | 2021-04-22 | 2021-10-19 | 中煤科工集团重庆研究院有限公司 | Device and method for preparing mud rock samples in batches |
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|---|---|---|---|---|
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| CN105823660A (en) * | 2016-03-15 | 2016-08-03 | 合肥工业大学 | Manufacturing method of soft rock undisturbed sample |
| CN206132475U (en) * | 2016-11-08 | 2017-04-26 | 三峡大学 | Portable column rock sample end leveling device |
| CN107044931A (en) * | 2017-04-14 | 2017-08-15 | 华侨大学 | A kind of rock test is with extremely brittle rock end face Plane surface grinding machine |
| CN206795552U (en) * | 2017-05-09 | 2017-12-26 | 江阴兴澄特种钢铁有限公司 | A kind of laminar buck fixture |
| CN107952999A (en) * | 2017-12-26 | 2018-04-24 | 重庆齿轮箱有限责任公司 | A kind of processing method of Hardened gear face large modulus cylindrical rack |
| CN110253432A (en) * | 2019-06-21 | 2019-09-20 | 哈尔滨工业大学 | A kind of fixture and its application method grinding brittleness thermoelectric material cuboid sample |
-
2020
- 2020-04-27 CN CN202010345737.2A patent/CN111474026A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10153537A (en) * | 1996-11-20 | 1998-06-09 | Sumitomo Wiring Syst Ltd | Method and apparatus for formation of cross section of sample |
| CN205129617U (en) * | 2015-11-19 | 2016-04-06 | 山东科技大学 | Mortar small specimen terminal surface anchor clamps of polishing |
| CN105823660A (en) * | 2016-03-15 | 2016-08-03 | 合肥工业大学 | Manufacturing method of soft rock undisturbed sample |
| CN206132475U (en) * | 2016-11-08 | 2017-04-26 | 三峡大学 | Portable column rock sample end leveling device |
| CN107044931A (en) * | 2017-04-14 | 2017-08-15 | 华侨大学 | A kind of rock test is with extremely brittle rock end face Plane surface grinding machine |
| CN206795552U (en) * | 2017-05-09 | 2017-12-26 | 江阴兴澄特种钢铁有限公司 | A kind of laminar buck fixture |
| CN107952999A (en) * | 2017-12-26 | 2018-04-24 | 重庆齿轮箱有限责任公司 | A kind of processing method of Hardened gear face large modulus cylindrical rack |
| CN110253432A (en) * | 2019-06-21 | 2019-09-20 | 哈尔滨工业大学 | A kind of fixture and its application method grinding brittleness thermoelectric material cuboid sample |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514313A (en) * | 2021-04-22 | 2021-10-19 | 中煤科工集团重庆研究院有限公司 | Device and method for preparing mud rock samples in batches |
| CN113514313B (en) * | 2021-04-22 | 2024-01-26 | 中煤科工集团重庆研究院有限公司 | Device and method for preparing mudstone samples in batches |
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Application publication date: 20200731 |