CN113686681B - Drawing test device and method for fibers with different embedding angles and embedding lengths - Google Patents
Drawing test device and method for fibers with different embedding angles and embedding lengths Download PDFInfo
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- CN113686681B CN113686681B CN202111037511.7A CN202111037511A CN113686681B CN 113686681 B CN113686681 B CN 113686681B CN 202111037511 A CN202111037511 A CN 202111037511A CN 113686681 B CN113686681 B CN 113686681B
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- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- 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
- G01N3/02—Details
- G01N3/04—Chucks
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- 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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/062—Special adaptations of indicating or recording means with mechanical indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0423—Chucks, fixtures, jaws, holders or anvils using screws
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0605—Mechanical indicating, recording or sensing means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The invention discloses a drawing test device and method for different embedding angles and embedding lengths of fibers, and relates to the technical field of drawing tests of fibers in concrete, wherein the drawing test device for different embedding angles and embedding lengths of fibers comprises a mold body, wherein the mold body is provided with at least one mold cavity for molding concrete; the clamp is used for clamping the fiber corresponding to the die cavity and is arranged above the die body; the die body is provided with a restraint piece matched with the slide way, so that the clamp moves downwards along the length direction of the slide way from top to bottom through the slide way, fibers clamped by the clamp are inserted into concrete, and the angles of the slide way and the clamp are adjustable so as to adjust the inclination angle of the slide way. The invention can process the embedment length and embedment angle of the fiber.
Description
Technical Field
The invention relates to the technical field of fiber drawing tests in concrete, in particular to a drawing test device for different embedding angles and embedding lengths of fibers, and further relates to a drawing test method for different embedding angles and embedding lengths of fibers.
Background
The addition of the fiber material to the concrete can control the further development of cracks of the matrix concrete, thereby improving the crack resistance. Because the tensile strength and the elongation of the fiber are high, the tensile strength, the bending resistance, the impact strength, the elongation and the toughness of the concrete are improved. Short fibers having a certain aspect ratio are mainly used for producing fiber concrete, but long fibers or fiber products are sometimes used. The main role of the fibres in fibre concrete is to limit the propagation of cracks in the cement matrix under the action of external forces. In the initial stage of loading, when the ingredients are proper and the proper high efficiency water reducing agent is mixed, the cement base material and the fiber bear external force together, and the former is the main bearing person of the external force; when the base material is cracked, the fibers across the crack become the primary subject of the external force. If the volume loading of the fibers is greater than a certain threshold, the entire composite material can continue to bear higher loads and undergo greater deformation until the fibers are pulled apart or the fibers are pulled out of the matrix, causing the composite material to fail. Compared with common concrete, the fiber concrete has higher tensile strength and bending strength, and particularly has large improvement range of toughness.
The simplest, economical and practical method for researching the bonding property between the fiber and the concrete is to directly draw the fiber and the concrete test block, but the embedded depth and the angle of the fiber are not easy to be stably controlled in the pouring and forming process of the test block, the number of unstable factors is large, the test is not facilitated, and the difficulty is brought to the determination of the interface bonding strength of the fiber and the concrete.
The fiber embedding angle is also lack of auxiliary tools to stabilize the angle of the fiber, partial technologies can only process the angle of one fiber in turn, and the efficiency is low.
The existing technology on the embedded length of the fiber mainly judges how long the fiber is embedded in the concrete through the exposed fiber length or a mark made on the fiber in advance, the two methods are that the embedded length of the exposed fiber is difficult to measure after a test block is poured, the embedded length is inconvenient to measure, the embedded length needs to be pulled outwards, the embedded length needs to be pressed inwards, the embedded length needs to be pulled out and the embedded length needs to be pulled in, the embedded length is measured according to the length of the concrete, the slurry can be attached to the fiber to cover the mark on the fiber, and the embedded length is difficult to see from the mark if the fiber sinks to cause the embedded length to be deeper in the solidification time.
For concrete with quick hardening, early strength and the like which is solidified faster, the control of the embedding length and the embedding angle in the prior art needs longer time, and the method is not suitable for testing the interface bonding performance of the concrete and fibers.
Disclosure of Invention
The present invention aims to solve at least to some extent one of the above-mentioned technical problems of the prior art. To this end, the embodiment of the invention provides a drawing test device for different embedment angles and embedment lengths of fibers, and the embedment lengths and embedment angles of the fibers are processed.
The embodiment of the invention also provides a drawing test method for different embedment angles and embedment lengths of fibers.
According to an embodiment of the first aspect of the invention, a drawing test device for different embedment angles and embedment lengths of fibers is provided, which comprises a mold body, a drawing test device and a drawing test device, wherein the mold body is provided with at least one mold cavity for molding concrete; a clamp for clamping a fiber corresponding to the mold cavity, the clamp disposed above the mold body; and at least two slide rail set spares, two slide rail set spares respectively with the both ends one-to-one of anchor clamps, slide rail set spares includes at least one slide bar, the slide bar is provided with the slide of arranging along its length direction, the mould body be provided with the restraint piece that the slide matches, so that anchor clamps pass through slide bar top-down follows the length direction of slide bar moves down, thereby will the fibre of anchor clamps centre gripping inserts the concrete, the slide bar with the anchor clamps angularly adjustable, in order to adjust the inclination of slide bar.
The drawing test device for different embedment angles and embedment lengths of the fibers at least has the following beneficial effects: the fiber is clamped by arranging the clamp, each fiber corresponds to each corresponding die cavity, the clamp moves downwards through the sliding rail assembly, specifically, the sliding rod moves along the length direction of the slide rod through the cooperation of the slide rail and the restraint piece, the angle of the sliding rod and the clamp is adjustable, after the angle of the sliding rod is adjusted, the clamp moves downwards along the length direction of the sliding rod, the fiber is driven to move downwards, and the fiber clamped by the clamp is inserted into concrete according to the embedding angle through the angle setting of the sliding rod. The invention can process the embedding length and the embedding angle of the fiber, keeps the embedding length and the embedding angle of the fiber unchanged in the solidification process of the concrete, and provides a more convenient and faster technical scheme for testing the interface bonding performance of the quick-hardening early-strength concrete and the fiber.
According to an embodiment of the first aspect of the present invention, the sliding rod and the clamp are connected through a second bolt to adjust an angle between the sliding rod and the clamp, and both ends of the clamp are provided with first angle scale marks.
According to an embodiment of the first aspect of the present invention, the slide bar is provided with an angle pointer pointing to the first angle scale mark to indicate an angle between the slide bar and the clamp, the angle pointer being in the same length direction as the slide bar.
According to an embodiment of the first aspect of the invention, the fixture is provided with second angular scale markings corresponding to the mould cavity for fibre alignment mounting.
According to an embodiment of the first aspect of the invention, the clamp comprises two clamping bodies for clamping the fibre, the two clamping bodies being fixed by a plurality of first bolts.
According to an embodiment of the first aspect of the present invention, two ends of the clamping body are bent outwards to form a connecting plate, and each of the slide rail assemblies includes two slide bars, and the slide bars are mounted on the connecting plate.
According to an embodiment of the first aspect of the present invention, the constraining member is a guide rod disposed on an end of the mold body, and the slide ways of the two slide bars in the slide rail assembly are clamped at two ends of the guide rod.
According to an embodiment of the first aspect of the invention, the end of the guide rod is fitted with a limit nut.
According to an embodiment of the first aspect of the present invention, two of the clamping bodies are provided with anti-skid pads at opposite sides.
According to the embodiment of the second aspect of the invention, a drawing test method for different embedment angles and embedment lengths of fibers is provided, and the drawing test method for different embedment angles and embedment lengths of fibers uses the drawing device for different embedment angles and embedment lengths of fibers according to the embodiment of the first aspect of the invention, and comprises the following steps: inserting the fibers between the two clamping bodies, adjusting the embedding length of the fibers, adjusting the embedding angle of the fibers through second angle scale marks, and screwing the first bolt to enable the two clamping bodies to clamp and fix the fibers; loosening the second bolt, adjusting the angle between the slide rod and the clamp to enable the angle to be the same as the embedding angle of the fiber, and screwing the second bolt; pouring concrete into the cavity of the die body, after pouring, sleeving the slide rod on the restraint body, and moving the clamp downwards along the length direction of the slide rod from top to bottom through the slide rod to enable the fibers to be inserted into the concrete along the corresponding embedding angle.
The drawing test method for different embedment angles and embedment lengths of the fibers at least has the following beneficial effects: through the embedment length of adjustment fibre to with the embedment angle of second angle scale mark regulation fibre, then, anchor clamps move down through slide bar top-down along the length direction of slide bar, make the fibre insert the concrete along the embedment angle that corresponds, the fibre is difficult to take place to remove or rotate at insertion in-process or concrete setting process, avoids leading to fibre embedment length or embedment angle to change.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
FIG. 1 is a front view of a first embodiment of the present invention;
FIG. 2 is a side view of a first embodiment of the present invention;
FIG. 3 is a front view of a second embodiment of the present invention;
FIG. 4 is a front view of a die body in an embodiment of the invention;
FIG. 5 is a top view of a die body in an embodiment of the invention;
FIG. 6 is a front view of a clamp in an embodiment of the present invention;
FIG. 7 is a top view of a clamp in an embodiment of the present invention;
FIG. 8 is a front view of a slide bar in an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
The first embodiment is as follows:
referring to fig. 1 and 2, and 4 to 8, there is shown a drawing test apparatus for different embedment angles and embedment lengths of fibers, comprising a die body 10, a jig 20, and at least two slide rail assemblies.
As shown in fig. 4 and 5, the mold body 10 has at least one cavity 11 for molding concrete, and the mold body 10 is provided with a release hole 12 at the bottom of the cavity 11.
Referring to fig. 6 and 7, the clamp 20 is used to clamp the fiber 41 corresponding to the cavity 11, and the clamp 20 is disposed above the mold body 10. Specifically, the clamp 20 includes two clamping bodies 21 for clamping the fiber 41, and the two clamping bodies 21 are fixed by a plurality of first bolts 23. Preferably, the anti-slip pads 24 are installed on the opposite sides of the two clamping bodies 21, so as to ensure that the fibers 41 are clamped more stably.
Referring to fig. 8, the two slide rail assemblies are respectively connected to two ends of the fixture 20 one by one, each slide rail assembly includes at least one slide bar 31, each slide bar 31 is provided with a slide rail 32 arranged along a length direction thereof, and the mold body 10 is provided with a restraining member matched with the slide rail 32, so that the fixture 20 moves down along the length direction of the slide bar 31 from top to bottom through the slide bar 31, and the fibers 41 clamped by the fixture 20 are inserted into the concrete.
The angle between the sliding rod 31 and the clamp 20 is adjustable so as to adjust the inclination angle of the sliding rod 31, specifically, the sliding rod 31 and the clamp 20 are connected through the second bolt 34 so as to adjust the angle between the sliding rod 31 and the clamp 20, the second bolt 34 is loosened to adjust, the second bolt 34 is screwed after the adjustment is completed, and the two ends of the clamp 20 are provided with the first angle scale marks 25.
It can be understood that, as shown in fig. 1 and fig. 2, the fixture 20 is arranged to clamp the fibers 41, each fiber 41 corresponds to each corresponding mold cavity 11, the fixture 20 moves down through the slide rail assembly, specifically, the slide rod 31 moves along the length direction thereof through the cooperation of the slide rail 32 and the constraining member, and the angle between the slide rod 31 and the fixture 20 is adjustable, after the angle of the slide rod 31 is adjusted, the fixture 20 moves down along the length direction of the slide rod 31, and simultaneously drives the fiber 41 to move down, and through the angle arrangement of the slide rod 31, the fiber 41 clamped by the fixture 20 is inserted into the concrete according to the embedding angle, and during the insertion into the concrete or the solidification of the concrete, the device can keep the embedding length and the embedding angle of the fiber unchanged, in this embodiment, the embedding angle is 90 °, that the length direction of the slide rail 32 forms 90 ° with the horizontal plane.
Preferably, the embedding angle may be indicated in a manner that the slide bar 31 is provided with an angle pointer 33 pointing to the first angle scale mark 25 to indicate the angle between the slide bar 31 and the clamp 20, the angle pointer 33 being the same as the length direction of the slide bar 31, as shown in fig. 8.
In addition, the fixture 20 is provided with a second angle scale mark 26 corresponding to the mold cavity 11 for aligning and installing the fiber 41, so as to facilitate the angle adjustment during the fiber installation process.
Referring to fig. 1, 7 and 8, the two ends of the clamping body 21 are bent outward to form a connecting plate 22, each sliding rail assembly includes two sliding rods 31, and the sliding rods 31 are mounted on the connecting plate 22. Referring to fig. 4 and 5, the constraining member is a guide rod 13 disposed at an end of the die body 10, the slide ways 32 of two slide rods 31 in the slide rail assembly are clamped at two ends of the guide rod 13, and further, a limit nut 14 is mounted at an end of the guide rod 13. It can be understood that two sliding rods 31 are installed at each end of the clamp 20, the sliding rods 31 are slidably sleeved on the guide rods 13, the sliding rods 31 are specifically sleeved on the end portions of the guide rods 13 and are limited by the nuts 14, and the end portions of the guide rods 13 are provided with external threads for the nuts to be screwed in.
The invention also discloses a drawing test method for different embedment angles and embedment lengths of fibers, which uses the drawing device for different embedment angles and embedment lengths of the fibers and comprises the following steps:
inserting the fibers between the two clamping bodies, adjusting the embedding length of the fibers, adjusting the embedding angle of the fibers through second angle scale marks, and screwing the first bolt to enable the two clamping bodies to clamp and fix the fibers;
loosening the second bolt, adjusting the angle between the slide rod and the clamp to enable the angle to be the same as the embedding angle of the fiber, and screwing the second bolt;
pouring concrete into the cavity of the die body, after pouring, sleeving the slide rod on the restraint body, and moving the clamp downwards along the length direction of the slide rod from top to bottom through the slide rod to enable the fibers to be inserted into the concrete along the corresponding embedding angle.
Specifically, the steps are as follows:
s1, the first bolts 23 of the two clamping bodies 21 are slightly loosened to leave a gap for inserting the fiber.
S2, inserting each fiber 41 between the two clamping bodies 21, wherein the specific position is the position of the second angle scale mark 26, and finely adjusting the first bolt 23 to enable the fiber 41 to move only by external force;
s3, the fiber is moved or rotated by hand, the embedding length of the fiber is adjusted to meet the requirement, the embedding angle of the fiber is adjusted by the second angle scale mark 26, and after the embedding angle of the fiber 41 is adjusted, the first bolt 23 is screwed tightly, so that the two clamping bodies 21 clamp and fix the fiber 41.
S4, screwing the second bolt of the sliding rod 31 into the screw hole of the clamp 20, loosening the second bolt, adjusting the angle between the sliding rod 31 and the clamp 20 to make the embedding angle of the sliding rod 31 and the fiber the same, determined by the angle pointer 33, and then screwing the second bolt, wherein the embedding angle of the embodiment is 90 °.
S5, the whole body formed by the clamp 20 and the slide bar 31 is covered on the die body 10, the nuts 14 on the two sides of the die body are adjusted to be close to the outer side of the slide bar 31, and the slide bar 31 is restrained by adjusting the four nuts 14.
S6, taking out the clamp 20 after adjustment, pouring the prepared concrete into the cavity 11 of the mold body 10, and after pouring, sleeving the slide rod 31 on the restraint body, that is, inserting the whole of the clamp 20 and the slide rod 31 into the guide rod 13 of the mold body 10, sliding down along the guide rod 13, so that the fiber 41 is inserted into the concrete along the corresponding angle, as shown in fig. 1.
S7, after the concrete is solidified, the nut 14 on the mold body 10 is loosened and the clamp 20 is removed.
Example two:
referring to fig. 3, this embodiment is different from the embodiment in that the embedment angle is different, and the embedment angle of this embodiment is 45 °.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The utility model provides a different embedment angles of fibre, embedment length draw test device which characterized in that: comprises that
A mold body having at least one mold cavity for molding concrete;
a clamp for clamping a fiber corresponding to the mold cavity, the clamp disposed above the mold body; and
at least two slide rail set spares, two slide rail set spares respectively with the both ends one-to-one of anchor clamps, slide rail set spares includes at least one slide bar, the slide bar is provided with the slide of arranging along its length direction, the mould body be provided with the restraint piece that the slide matches, so that anchor clamps pass through slide bar top-down follows the length direction of slide bar moves down, thereby will the fibre of anchor clamps centre gripping inserts the concrete, the slide bar with the anchor clamps angularly adjustable, in order to adjust the inclination of slide bar.
2. The fiber drawing test device with different embedment angles and embedment lengths according to claim 1, wherein: the slide bar with anchor clamps pass through second bolted connection to adjust both angles, anchor clamps both ends all are provided with first angle scale mark.
3. The fiber drawing test device with different embedment angles and embedment lengths according to claim 2, wherein: the sliding rod is provided with an angle pointer pointing to the first angle scale mark so as to indicate an angle between the sliding rod and the clamp, and the length direction of the angle pointer is the same as that of the sliding rod.
4. The fiber drawing test device with different embedment angles and embedment lengths according to claim 2 or 3, characterized in that: the fixture is provided with second angle scale marks corresponding to the die cavity for aligning and mounting fibers.
5. The fiber drawing test device with different embedment angles and embedment lengths according to claim 4, wherein: the clamp comprises two clamping bodies for clamping fibers, and the two clamping bodies are fixed through a plurality of first bolts.
6. The fiber drawing test device with different embedment angles and embedment lengths according to claim 5, wherein: the clamping body is characterized in that two ends of the clamping body are bent outwards to form connecting plates, each sliding rail assembly comprises two sliding rods, and the sliding rods are mounted on the connecting plates.
7. The fiber drawing test device with different embedment angles and embedment lengths according to claim 6, wherein: the constraint piece is a guide rod arranged on the end part of the die body, and the slide ways of the two slide rods in the slide rail assembly are clamped at the two ends of the guide rod.
8. The fiber drawing test device with different embedment angles and embedment lengths according to claim 7, wherein: and a limiting nut is arranged at the end part of the guide rod.
9. The fiber drawing test device with different embedment angles and embedment lengths according to claim 5, wherein: and anti-slip pads are arranged on the opposite sides of the two clamping bodies.
10. A method for testing different embedment angles and embedment lengths of fibers by drawing, which is characterized by using the drawing device for testing different embedment angles and embedment lengths of fibers according to any one of claims 5 to 9, and comprises the following steps:
inserting the fibers between the two clamping bodies, adjusting the embedding length of the fibers, adjusting the embedding angle of the fibers through second angle scale marks, and screwing the first bolt to enable the two clamping bodies to clamp and fix the fibers;
loosening the second bolt, adjusting the angle between the slide rod and the clamp to enable the angle to be the same as the embedding angle of the fiber, and screwing the second bolt;
pouring concrete into the cavity of the die body, after pouring, sleeving the slide rod on the restraint body, and moving the clamp downwards along the length direction of the slide rod from top to bottom through the slide rod to enable the fibers to be inserted into the concrete along the corresponding embedding angle.
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| CN202111037511.7A CN113686681B (en) | 2021-09-06 | 2021-09-06 | Drawing test device and method for fibers with different embedding angles and embedding lengths |
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| CN101603916A (en) * | 2009-06-15 | 2009-12-16 | 青岛科技大学 | A kind of measuring friction coefficient of direct-reading temperature-change type high molecular material device and method |
| CN105865868B (en) * | 2016-04-01 | 2018-05-15 | 四川大学 | The artificially preparation method of the rock sample of structural plane containing different directions |
| CN207586030U (en) * | 2017-12-25 | 2018-07-06 | 中铁六局集团有限公司 | A kind of major diameter section of jurisdiction resistance to plucking instrument experimental rig of angle adjustable |
| CN208223962U (en) * | 2018-05-03 | 2018-12-11 | 浙江海洋大学 | A kind of tencel drawing angle disk |
| CN209203600U (en) * | 2018-09-27 | 2019-08-06 | 中国人民解放军第四军医大学 | A kind of optical fiber embedding device of angle adjustable |
| CN109142006B (en) * | 2018-11-09 | 2023-09-05 | 交通运输部天津水运工程科学研究所 | Device and method for accurately positioning and quickly burying miniature sensor |
| CN109434757B (en) * | 2018-12-17 | 2023-08-08 | 南京工程学院 | Auxiliary installation device capable of adjusting inclination angle of embedded bolt and application method thereof |
| CN211740888U (en) * | 2019-12-26 | 2020-10-23 | 广东长大道路养护有限公司 | Concrete steel fiber drawing detection forming device |
| CN111024478A (en) * | 2019-12-27 | 2020-04-17 | 上海市市政规划设计研究院有限公司 | Steel fiber pull-out test piece pouring mold, pouring method and bonding slippage testing method |
| CN111198155B (en) * | 2020-01-13 | 2021-07-20 | 西南交通大学 | Sample forming device and method for flexible fiber drawing test |
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