CN114739760B - Rapid manufacturing method of shear rheological original sample of large-size weak interlayer with arbitrary shape - Google Patents
Rapid manufacturing method of shear rheological original sample of large-size weak interlayer with arbitrary shape Download PDFInfo
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- CN114739760B CN114739760B CN202210241290.3A CN202210241290A CN114739760B CN 114739760 B CN114739760 B CN 114739760B CN 202210241290 A CN202210241290 A CN 202210241290A CN 114739760 B CN114739760 B CN 114739760B
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- side plates
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- bottom plate
- weak interlayer
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- 239000011229 interlayer Substances 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 238000012360 testing method Methods 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 33
- 239000011435 rock Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000011049 filling Methods 0.000 claims description 21
- 239000010410 layer Substances 0.000 claims description 16
- 239000012188 paraffin wax Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000005056 compaction Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 238000007790 scraping Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000001680 brushing effect Effects 0.000 claims description 3
- 239000011083 cement mortar Substances 0.000 claims description 3
- 239000002480 mineral oil Substances 0.000 claims description 3
- 235000010446 mineral oil Nutrition 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000008021 deposition Effects 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 239000000243 solution Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- G01N1/36—Embedding or analogous mounting of samples
Abstract
The invention relates to the technical field of rock mechanics tests, in particular to a rapid manufacturing method of a large-size random-shape weak interlayer shear rheological original sample, which comprises a bottom plate, wherein two horizontal mounting grooves are formed in the bottom plate, first threaded holes are formed in the periphery of the bottom plate, two side plates are further arranged, two threaded grooves are symmetrically formed in the lower sides of the side plates, and the first threaded holes are connected with the threaded grooves through first screws. The beneficial effects of the invention are as follows: the invention uses the test die, the die is simple to install and convenient to use, and an innovative method is used in the sample preparation, so that the problem that the weak interlayer is difficult to sample completely is solved, meanwhile, the material is fully utilized, and the test requirement can be met only by using a weak interlayer with an original deposition joint in any shape. Compared with the traditional sample method, the method greatly reduces the time cost and the price cost for manufacturing the rock sample, greatly improves the efficiency of performing a large number of tests, and has the advantage of being beneficial to popularization and test.
Description
Technical Field
The invention relates to the technical field of rock mechanics tests, in particular to a rapid manufacturing method of a shear rheological undisturbed sample of a large-size weak interlayer with any shape.
Background
Before rock mechanical test, the corresponding rock sample is generally required to be collected on site, and cut and polished in a laboratory to prepare a rock sample finished product which can be used for the test, however, the thickness of the weak interlayer is smaller than that of the adjacent rock stratum, the mechanical strength and the deformation modulus are also lower, the saturated compressive strength is only one half of the dry compressive strength or lower, the thickness is thinner, and the rock sample is easy to soften or mud when meeting water. Therefore, it is difficult to access a complete and experimentally satisfactory weak interlayer in the field.
At present, most of the market is to take several tons from site and send them to third party institutions for processing, but the proportion of qualified rock samples which can be taken is still not high. The sampling is troublesome, and the transportation is inconvenient, still can cause the wearing of rock specimen in the middle of, and processing cost of manufacture is high, and qualified finished product proportion is low, and this kind of flow leads to test cycle extension, and test cost increases.
Disclosure of Invention
The invention provides a rapid manufacturing method of a large-size and arbitrary-shape soft interlayer shear rheological undisturbed sample, which comprises a bottom plate, wherein two horizontal mounting grooves are formed in the bottom plate, first threaded holes are formed in the periphery of the bottom plate, two side plates are further arranged, two threaded grooves are symmetrically formed in the lower sides of the side plates, and the first threaded holes are connected with the threaded grooves through first screws; two vertical mounting grooves are formed in the opposite surfaces of the two side plates; the two ends of the two clamping plates are respectively matched with vertical mounting grooves formed on the two side plates;
The sample method comprises the following steps:
S100, mold assembly: placing the bottom plate on the ground, symmetrically placing the two side plates on the bottom plate, and connecting the two side plates through a first screw; inserting the clamping plate into the two vertical mounting grooves, and applying downward force to enable the bottom of the clamping plate to be in contact with the horizontal mounting grooves; after the assembly is completed, checking the size of the mold, and brushing a layer of release agent on the inner surface of the mold;
S200, mold material injection: placing the mould on a vibrating table, adding an accelerator into the filling material, fully mixing, and then filling the filling material into the mould by using a large seeder;
S300, vibration compaction: opening a switch of the vibrating table, automatically stopping the machine for 60 times by vibrating, and feeding and vibrating again for 60 times, so that the cycle is performed until the height reaches the lower end position of the scale mark; placing the soft interlayer into the container for vibrating for 30 times, circulating until the half of the soft interlayer is exposed out, uniformly scraping by a small seeder, and standing for 12 hours;
S400, adding paraffin and melting: paving a layer of paraffin particles on the rock sample after standing and solidification, just reaching the upper end position of the scale mark, then putting the rock sample into an oven, melting, condensing and standing to obtain a paraffin layer;
S500, mold material injection and compaction: repeating S200 and S300 until pouring of the whole sample is completed, enabling the filling material to be 1-2mm higher than the die, scraping off redundant filling material on the die, and trowelling by a trowelling knife when the filling material is initially set;
s600, maintaining at constant temperature and demolding: placing the poured test piece into an incubator for standing for one day and night to two days and night, removing the mold, and rapidly placing the test piece into a standard curing room for curing after removing the mold;
S700, drilling a test piece: after the test piece is maintained, the middle paraffin layer is melted, and then the laboratory precision bench drill is used for drilling the test piece, so that the test piece meets the test requirement.
As yet further technical effects of the invention are: the distance between two thread grooves on the same side plate is equal to the distance between two first threaded holes on the bottom plate at a longer distance.
As yet further technical effects of the invention are: the distance between the thread grooves on the two side plates at the same end is equal to the distance between the two first threaded holes at a shorter distance on the bottom plate.
As yet further technical effects of the invention are: the thickness of the clamping plate is equal to the width of the horizontal mounting groove and the width of the vertical mounting groove.
As yet further technical effects of the invention are: the two sides of the side plates are respectively provided with a second threaded hole, the two side plates are connected through a second screw, and a nut is arranged on the second screw.
As yet further technical effects of the invention are: scale marks are arranged on the inner side of the side plate.
As yet further technical effects of the invention are: the filling material is cement mortar.
As yet further technical effects of the invention are: the bottom plate, the side plates and the clamping plates are all made of die steel materials.
As yet further technical effects of the invention are: the release agent is mineral oil.
The beneficial effects of the invention are as follows: the invention uses the test die, the die is simple to install and convenient to use, and an innovative method is used in the sample preparation, so that the problem that the weak interlayer is difficult to sample completely is solved, meanwhile, the material is fully utilized, and the test requirement can be met only by using a weak interlayer with an original deposition joint in any shape. Compared with the traditional sample method, the method greatly reduces the time cost and the price cost for manufacturing the rock sample, greatly improves the efficiency of performing a large number of tests, and has the advantage of being beneficial to popularization and test.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained from the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a rapid manufacturing method of a shear rheological undisturbed sample of a large-size weak interlayer with any shape;
FIG. 2 is a bottom view of the method for rapidly manufacturing a shear rheological undisturbed sample of a large-size weak interlayer of any shape according to the invention;
FIG. 3 is a front view of a regular-shaped sample produced by the rapid manufacturing method of a large-size random-shaped weak interlayer shear rheological undisturbed sample of the invention;
FIG. 4 is a schematic flow chart of a method for shearing rheological samples of a large-size arbitrarily shaped weak interlayer according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 1, the method for quickly manufacturing a shear rheological undisturbed sample with a large-size and arbitrary-shape weak interlayer provided by the embodiment of the invention comprises a bottom plate 1, wherein two horizontal mounting grooves 11 are formed in the bottom plate 1, first threaded holes 13 are formed in the periphery of the bottom plate 1, two side plates 2 are further included, two threaded grooves 25 are symmetrically formed in the lower sides of the side plates 2, and the first threaded holes 13 are connected with the threaded grooves 25 through first screws 12; two vertical mounting grooves 21 are formed on the opposite surfaces of the two side plates 2; the two clamping plates 3 are respectively matched with the two horizontal mounting grooves 11 at the bottoms of the two clamping plates 3, and the two ends of the two clamping plates 3 are respectively matched with the vertical mounting grooves 21 formed in the two side plates 2.
The distance between the two screw grooves 25 on the same side plate 2 is equal to the distance between the two first screw holes 13 on the bottom plate 1 at a longer distance.
The distance between the screw grooves 25 on the two side plates 2 at the same end is equal to the distance between the two first screw holes 13 on the bottom plate 1 at a shorter distance.
The thickness of the clamping plate 3 is equal to the width of the horizontal mounting groove 11 and the width of the vertical mounting groove 21.
The two sides of the side plates 2 are respectively provided with a second threaded hole 22, the two side plates 2 are connected through a second screw 23, and a nut 24 is arranged on the second screw 23.
The inner side of the side plate 2 is provided with graduation marks 26.
A method for shearing rheological samples of a large-size and random-shape weak interlayer, comprising the following steps:
S100, mold assembly: the bottom plate 1 is placed on the ground, and the two side plates 2 are symmetrically placed on the bottom plate 1 and are connected through a first screw 12; the clamping plate 3 is inserted into the two vertical mounting grooves 21 and is forced downwards, so that the bottom of the clamping plate 3 is contacted with the horizontal mounting grooves 11; after the assembly is completed, checking the size of the mold, and brushing a layer of release agent on the inner surface of the mold;
S200, mold material injection: placing the mould on a vibrating table, adding an accelerator into the filling material 5, fully mixing, and then loading the filling material 5 into the mould by using a large seeder;
s300, vibration compaction: opening a vibrating table switch, automatically stopping the machine for 60 times by vibrating, and feeding the material again for 60 times by vibrating, so that the cycle is performed until the height reaches the lower end position of the scale mark 26; at this time, putting the soft interlayer 4 into the container for vibrating for 30 times, circulating until the half of the soft interlayer 4 is just exposed outside, uniformly scraping by a small seeder, and finally standing for 12 hours;
S400, adding paraffin and melting: paving a layer of paraffin particles on the rock sample after standing and solidification, just reaching the upper end position of the scale mark 26, then putting the rock sample into an oven, melting, condensing and standing to obtain a layer of paraffin layer 6;
S500, mold material injection and compaction: repeating S200 and S300 until pouring of the whole sample is completed, enabling the filling material 5 to be 1-2mm higher than the die, scraping off the redundant filling material 5 on the die, and trowelling by a trowelling knife when the filling material 5 is initially set;
s600, maintaining at constant temperature and demolding: placing the poured test piece into an incubator for standing for one day and night to two days and night, removing the mold, and rapidly placing the test piece into a standard curing room for curing after removing the mold;
S700, drilling a test piece: after the test piece is maintained, the middle paraffin layer is melted, and then the laboratory precision bench drill is used for drilling the test piece, so that the test piece meets the test requirement.
The filling material is cement mortar.
The bottom plate 1, the side plates 2 and the clamping plates 3 are all made of die steel materials, the die steel is a steel grade for manufacturing dies such as cold stamping dies, hot forging dies and die casting dies, and the dies are main processing tools for manufacturing parts in industrial departments such as machine manufacturing, radio instruments, motors, electric appliances and the like. The quality of the die directly affects the quality of the press working process, the precision yield and the production cost of the product, and the quality and the service life of the die are mainly affected by the die materials and the heat treatment besides reasonable structural design and machining precision.
The release agent is mineral oil, other release agents which do not react with the filling material can be used, a very thin layer can be brushed on, and the specific value can be about 1 mm.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (10)
1. The rapid manufacturing method of the shearing rheological undisturbed sample of the weak intermediate layer with any large size and any shape comprises a bottom plate (1), wherein two horizontal mounting grooves (11) are formed in the bottom plate (1), and the rapid manufacturing method is characterized in that first threaded holes (13) are formed in the periphery of the bottom plate (1), the rapid manufacturing method also comprises two side plates (2), two thread grooves (25) are symmetrically formed in the lower sides of the side plates (2), and the first threaded holes (13) are connected with the thread grooves (25) through first screws (12); two vertical mounting grooves (21) are formed in the opposite surfaces of the two side plates (2); the two clamping plates (3) are matched with the two horizontal mounting grooves (11) respectively, and two ends of the two clamping plates (3) are matched with the vertical mounting grooves (21) formed in the two side plates (2) respectively;
s100, mold assembly: the bottom plate (1) is placed on the ground, and the two side plates (2) are symmetrically placed on the bottom plate (1) and connected through a first screw (12); then the clamping plate (3) is inserted into the two vertical mounting grooves (21) and is forced downwards, so that the bottom of the clamping plate (3) is contacted with the horizontal mounting grooves (11); after the assembly is completed, checking the size of the mold, and brushing a layer of release agent on the inner surface of the mold;
s200, mold material injection: placing the mould on a vibrating table, adding an accelerator into the filling material (5), fully mixing, and then loading the filling material () into the mould by a large seeder;
S300, vibration compaction: opening a switch of the vibrating table, automatically stopping the machine for 60 times by vibrating, and feeding and vibrating again for 60 times, so that the cycle is performed until the height reaches the lower end position of the scale mark (26); placing the soft interlayer (4) into the container for vibrating for 30 times, circulating until the half of the soft interlayer (4) is exposed to the outside, uniformly scraping by a small seeder, and standing for 12 hours;
S400, adding paraffin and melting: paving a layer of paraffin particles on the rock sample after standing and solidification, just reaching the upper end position of the scale mark (26), then putting the rock sample into an oven, and condensing and standing after melting to finally obtain a layer of paraffin layer (6);
s500, mold material injection and compaction: repeating S200 and S300 until pouring of the whole sample is completed, enabling the filling material (5) to be higher than the die, scraping off the redundant filling material (5) on the die, and trowelling by a trowelling knife when the filling material (5) is initially set;
s600, maintaining at constant temperature and demolding: placing the poured test piece into an incubator for standing for one day and night to two days and night, removing the mold, and rapidly placing the test piece into a standard curing room for curing after removing the mold;
S700, drilling a test piece: after the test piece is maintained, the middle paraffin layer is melted, and then the laboratory precision bench drill is used for drilling the test piece, so that the test piece meets the test requirement.
2. The rapid manufacturing method of the large-size random-shape weak interlayer shear rheological undisturbed sample according to claim 1, wherein the distance between two thread grooves (25) on the same side plate (2) is equal to the distance between two first thread holes (13) on a base plate (1) at a longer distance.
3. The rapid manufacturing method of the large-size random-shape weak interlayer shear rheological undisturbed sample according to claim 1 or 2, wherein the distance between the thread grooves (25) on the two side plates (2) positioned at the same end is equal to the distance between the two first thread holes (13) on the bottom plate (1) at a shorter distance.
4. The rapid manufacturing method of the large-size random-shape weak interlayer shear rheological undisturbed sample according to claim 1, wherein the thickness of the clamping plate (3) is equal to the width of the horizontal mounting groove (11) and the width of the vertical mounting groove (21).
5. The rapid manufacturing method of the large-size arbitrary-shape weak interlayer shear rheological undisturbed sample according to claim 1, wherein the two sides of the side plates (2) are provided with second threaded holes (22), the two side plates (2) are connected through second screws (23), and nuts (24) are arranged on the second screws (23).
6. The rapid manufacturing method of the large-size random-shape weak interlayer shear rheological undisturbed sample is characterized in that the inner side of the side plate (2) is provided with scale marks (26).
7. The rapid manufacturing method of the large-size random-shape weak interlayer shear rheological undisturbed sample, according to claim 1, wherein the filling material is cement mortar.
8. The rapid manufacturing method of the large-size random-shape weak interlayer shear rheological undisturbed sample is characterized in that the bottom plate (1), the side plates (2) and the clamping plates (3) are all made of die steel materials.
9. The method for rapidly manufacturing a large-size random-shape weak interlayer shear rheological undisturbed sample according to claim 7, wherein the release agent is mineral oil.
10. The rapid manufacturing method of a large-size arbitrary-shape weak interlayer shear rheological undisturbed sample according to claim 7, wherein in S500, the filling material (5) is made to be 1-2mm higher than the die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210241290.3A CN114739760B (en) | 2022-03-11 | 2022-03-11 | Rapid manufacturing method of shear rheological original sample of large-size weak interlayer with arbitrary shape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210241290.3A CN114739760B (en) | 2022-03-11 | 2022-03-11 | Rapid manufacturing method of shear rheological original sample of large-size weak interlayer with arbitrary shape |
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| Publication Number | Publication Date |
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| CN114739760A CN114739760A (en) | 2022-07-12 |
| CN114739760B true CN114739760B (en) | 2024-04-16 |
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| CN202210241290.3A Active CN114739760B (en) | 2022-03-11 | 2022-03-11 | Rapid manufacturing method of shear rheological original sample of large-size weak interlayer with arbitrary shape |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030005040A (en) * | 2002-07-05 | 2003-01-15 | 주식회사 한국건설관리공사 | Sampler for weak layer |
| CN109507025A (en) * | 2018-10-16 | 2019-03-22 | 浙江科技学院 | It is a kind of containing weak intercalated layer and thickness is adjustable and the production method of the structural fece sample of rigid constraint |
| CN109520793A (en) * | 2018-10-16 | 2019-03-26 | 浙江科技学院 | A kind of adjustable weak intercalated layer production method of the thickness of existing protolith structural plane |
| CN110333111A (en) * | 2019-06-14 | 2019-10-15 | 河海大学 | A kind of preparation method of the soft rock direct shear test undisturbed sample containing prefabricated shearing seam |
| CN111551450A (en) * | 2020-05-28 | 2020-08-18 | 武汉科技大学 | Soft rock shearing box with blasting and shearing coupling effects and test method thereof |
| CN113790942A (en) * | 2021-09-14 | 2021-12-14 | 中南大学 | Preparation device and method of simulation rock sample containing variable-inclination-angle weak interlayer |
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2022
- 2022-03-11 CN CN202210241290.3A patent/CN114739760B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030005040A (en) * | 2002-07-05 | 2003-01-15 | 주식회사 한국건설관리공사 | Sampler for weak layer |
| CN109507025A (en) * | 2018-10-16 | 2019-03-22 | 浙江科技学院 | It is a kind of containing weak intercalated layer and thickness is adjustable and the production method of the structural fece sample of rigid constraint |
| CN109520793A (en) * | 2018-10-16 | 2019-03-26 | 浙江科技学院 | A kind of adjustable weak intercalated layer production method of the thickness of existing protolith structural plane |
| CN110333111A (en) * | 2019-06-14 | 2019-10-15 | 河海大学 | A kind of preparation method of the soft rock direct shear test undisturbed sample containing prefabricated shearing seam |
| CN111551450A (en) * | 2020-05-28 | 2020-08-18 | 武汉科技大学 | Soft rock shearing box with blasting and shearing coupling effects and test method thereof |
| CN113790942A (en) * | 2021-09-14 | 2021-12-14 | 中南大学 | Preparation device and method of simulation rock sample containing variable-inclination-angle weak interlayer |
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| Title |
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| A Novel Unsteady Fractal Derivative Creep Model for Soft Interlayerswith Varying Water Contents;Wenmin Yao et al.;《KSCE Journal of Civil Engineering》;20191231;第5064-5075页 * |
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