CN113107562A - Method for improving rod body structure of high-strength bonding type basalt fiber bar anchor cable - Google Patents
Method for improving rod body structure of high-strength bonding type basalt fiber bar anchor cable Download PDFInfo
- Publication number
- CN113107562A CN113107562A CN202110394196.7A CN202110394196A CN113107562A CN 113107562 A CN113107562 A CN 113107562A CN 202110394196 A CN202110394196 A CN 202110394196A CN 113107562 A CN113107562 A CN 113107562A
- Authority
- CN
- China
- Prior art keywords
- anchor cable
- basalt fiber
- rod body
- hollow steel
- cable rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920002748 Basalt fiber Polymers 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 59
- 239000010959 steel Substances 0.000 claims abstract description 59
- 239000000084 colloidal system Substances 0.000 claims abstract description 18
- 239000003292 glue Substances 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 238000005488 sandblasting Methods 0.000 claims abstract description 15
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0006—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by the bolt material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0086—Bearing plates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
Abstract
The invention provides a method for improving a high-strength bonding type basalt fiber bar anchor cable rod body structure, which comprises the following steps: s1, manufacturing an anchor cable rod body, respectively sleeving two hollow steel sleeves at two ends of the basalt fiber bars, and injecting glue into gaps among the basalt fiber bars of the hollow steel sleeves to manufacture the anchor cable rod body; s2 testing the anchor cable rod body, stretching the basalt fiber rib until the basalt fiber rib is damaged, and testing the tensile strength f of the anchor cable rod body1(ii) a S3 repeating the step S1 to manufacture a plurality of improved anchor cable rod bodies, modifying one or more structural parameters of the sand blasting, the size and the length of the hollow steel sleeve and the strength of the threads and the glue injection colloid in the step S1 each time of manufacturing, and testing the tensile strength f of each anchor cable rod bodyiAnd selecting the structural parameters of the improved anchor cable rod body with the maximum tensile strength as the optimal anchor cable rod body structural parameters. The invention has the beneficial effects that: the structural parameters of the anchor cable rod body with the maximum tensile strength are taken as the optimum, so that the tensile strength of the basalt fiber bar can be fully exerted.
Description
Technical Field
The invention relates to the technical field of manufacturing of geotechnical engineering protection and reinforcement anchor cables, in particular to a method for improving a rod body structure of a high-strength bonding type basalt fiber bar anchor cable.
Background
The basalt fiber serving as a novel composite material in the 21 st century has the advantages of high strength, strong corrosion resistance, light weight, low manufacturing cost and the like, and compared with the traditional steel anchor cable, the basalt fiber reinforced cable prepared by adopting basalt fiber ribs as an anchor cable rod body material can greatly improve the durability and reliability of protection engineering. However, the basalt fiber reinforcement has the characteristics of weak shear strength and high tensile strength in the aspect of mechanical properties, so that the tensile strength of the basalt fiber reinforcement is not fully exerted in the tensioning process and is damaged by shearing when the traditional steel anchor cable lock body structure or structure is directly moved.
Disclosure of Invention
In view of this, in order to fully exert the tensile strength of the basalt fiber bar in the anchor cable rod body, the embodiment of the invention provides a method for modifying a high-strength bonding type basalt fiber bar anchor cable rod body structure.
The embodiment of the invention provides a method for improving a high-strength bonding type basalt fiber bar anchor cable rod body structure, which comprises the following steps:
s1 preparation anchor rope body of rod specifically includes: carrying out sand blasting treatment on the outer surface of the basalt fiber bar, processing two hollow steel sleeves, processing threads on the outer wall and the inner wall of each hollow steel sleeve, respectively sleeving the two hollow steel sleeves at two ends of the basalt fiber bar, and injecting glue into a gap between each hollow steel sleeve and the corresponding basalt fiber bar to manufacture an anchor cable bar body;
the test of S2 anchor rope body of rod specifically includes: enabling the basalt fiber bars in the middle of the anchor cable bar body to penetrate through the center-penetrating jack, arranging threaded connectors on two hollow steel sleeves of the anchor cable bar body, enabling the two threaded connectors to respectively abut against the center-penetrating jack, tensioning the basalt fiber bars through the center-penetrating jack in a load grading loading mode until the bars are damaged, and testing the tensile strength f1 of the anchor cable bar body;
s3, repeating the step S1 to manufacture a plurality of improved anchor cable rod bodies, modifying one or more structural parameters of the sand blasting, the size and the length of the hollow steel sleeve and the colloid strength of the thread and the glue injection in the step S1 during each manufacturing, testing the tensile strength fi of each anchor cable rod body according to the method in the step S2, and selecting the structural parameter of the improved anchor cable rod body with the largest tensile strength as the optimal anchor cable rod body structural parameter.
Further, in the step S1, the grain size of sand grains sprayed by the sand blasting treatment on the outer surface of the basalt fiber bar is 20-40 meshes.
Further, in the step S1, the tensile strength of the hollow steel sleeve and the glue injection colloid is greater than 36MPa, and the compressive strength of the glue injection colloid is greater than 90 MPa.
Further, the length of the hollow steel sleeve is 20 times of the diameter of the basalt fiber rib after sand blasting.
Furthermore, the material of the hollow steel sleeve is at least higher than 45 # steel, and the thickness of the pipe wall is larger than 5 mm.
Further, the threaded connecting piece comprises a tray and a nut, the tray and the nut are all sleeved on the hollow steel sleeve, one side of the tray abuts against the center-penetrating jack, the other end of the tray is connected with the nut, and the nut is in threaded connection with the hollow steel sleeve.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: the invention relates to a method for improving a high-strength bonding type basalt fiber bar anchor cable rod body structure.
Drawings
Fig. 1 is a schematic view of a cable bolt body;
FIG. 2 is a schematic illustration of the structure of the hollow steel casing 2 of FIG. 1;
FIG. 3 is a schematic view of the connection of the anchor cable rod body in the measurement state;
FIG. 4 is a schematic view of the connection of the anchor cable rod body to the threaded connector of FIG. 3;
FIG. 5 is a schematic view of the connection of the threaded connection of FIG. 3 to a hollow steel casing.
In the figure: 1-basalt fiber rib, 2-hollow steel sleeve, 3-glue injection colloid, 4-external thread, 5-internal thread, 6-penetrating jack, 7-oil inlet pipe, 8-oil return pipe, 9-hydraulic pump, 10-nut and 11-tray.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
The embodiment of the invention provides a method for improving a rod body structure of a high-strength bonding type basalt fiber bar anchor cable, which comprises the following steps:
s1, making an anchor cable rod body, please refer to fig. 1 and 2, which specifically includes: the method comprises the steps of carrying out sand blasting treatment on the outer surface of a basalt fiber bar 1, processing two hollow steel sleeves 2, processing threads on the outer wall and the inner wall of each hollow steel sleeve 2, respectively sleeving the two hollow steel sleeves 2 at two ends of the basalt fiber bar 1, and injecting glue into a gap between each hollow steel sleeve 2 and the corresponding basalt fiber bar 1 to manufacture an anchor cable bar body.
The outer surface of the basalt fiber bar 1 is subjected to sand blasting to form the basalt fiber bar with sand, the adhesive friction force between the bar material and the subsequent glue injection colloid 3 is enhanced, the grain size of the sand blasting grains is generally 20-40 meshes, and the diameter of the basalt fiber bar before sand blasting is about 12 mm.
The outer wall and the inner wall of the hollow steel sleeve 2 are both threaded by threading, so that the outer wall of the hollow steel sleeve forms an external thread 4, the inner wall forms an internal thread 5, and the threading depth and the threading distance can be adjusted and controlled during threading.
In order to ensure that the hollow steel sleeve 2 is not broken in the tensioning process, the material of the hollow steel sleeve 2 is at least higher than 45 # steel, and the net thickness of the wall thickness of the hollow steel sleeve 2 is more than 5 mm. In addition, the length of the hollow steel sleeve 2 is about 20 times of the diameter of the sanded basalt fiber rib 1, so that the sanded basalt fiber rib 1 and the hollow steel sleeve 2 have enough bonding strength.
The two hollow steel sleeves 2 are respectively positioned at two ends of the sanded basalt fiber rib 1, the sanded basalt fiber rib 1 is arranged in the hollow steel sleeve 2, a colloid 3 is filled into the hollow steel sleeve 2, and the bonding friction force between the inner wall of the hollow steel sleeve 2 and the colloid 3 is increased through an internal thread 5. The strength of the glue injection colloid 3 at least meets the requirements that the bonding tensile strength of the hollow steel sleeve 2 and the glue injection colloid 3 is more than 36MPa, and the compressive strength of the glue injection colloid 3 is more than 90 MPa; in addition, the colloid poured into the hollow steel sleeve 2 needs to be full and uniform, and no air bubbles exist after the colloid is condensed.
And S2, testing the tensile strength of the basalt fiber bar 1 of the anchor cable bar body.
Referring to fig. 3, 4 and 5, the method specifically includes: enabling the basalt fiber bars 1 in the middle of the anchor cable bar body to penetrate through a center-penetrating jack 6, arranging threaded connectors on two hollow steel sleeves 2 of the anchor cable bar body, enabling the two threaded connectors to respectively abut against the center-penetrating jack 6, tensioning the basalt fiber bars 1 through the center-penetrating jack 6 in a load grading loading mode until the bars are damaged, and testing the tensile strength f of the anchor cable bar body1. The feed-through jack 6 is connected with a hydraulic pump 9 through an oil inlet pipe 7 and an oil return pipe 8, and the tensile strength f of the anchor cable rod body is determined by acquiring the pumping pressure of the hydraulic pump 91。
The threaded connector is used for being connected with the external thread 4 on the hollow steel sleeve 2, bearing the load of the center-penetrating jack 6 and transmitting the load to the hollow steel sleeve 2. In this embodiment, the threaded connector includes a tray 11 and a nut 10, the tray 11 and the nut 10 are both sleeved on the hollow steel sleeve 2, one side of the tray 11 abuts against the center-penetrating jack 6, the other end of the tray is connected with the nut 10, the nut 10 is in threaded connection with the hollow steel sleeve 2, and the tray 11 is used as a supporting body when the center-penetrating jack 6 stretches the basalt fiber rib 1.
When the anchor cable rod body is tensioned, the center-penetrating jack 6 directly acts on the hollow steel sleeve 2 on the outer surface of the basalt fiber bar 1 bar material, so that the shear stress is dispersed along the hollow steel sleeve 2, the shear stress directly acting on the surface of the basalt fiber bar 1 bar material is reduced, and the tensile strength of the basalt fiber bar 1 can be fully exerted.
S3, changing the structural parameters of the anchor cable rod body, testing the tensile strength of the anchor cable rod body, and selecting the optimal structural parameters of the anchor cable rod body.
Specifically, the step S1 is repeated to manufacture a plurality of improved anchor cable rod bodies, and one or more structural parameters of the sand blasting, the size and length of the hollow steel sleeve 2 and the strength of the thread and the glue injection colloid 3 in the step S1 are modified during each manufacturing, wherein the structural parameters may specifically be the diameter of the basalt fiber bar 1 and the sand grain size of the sand blasting, the inner diameter, the outer diameter, the thickness and the length of the hollow steel sleeve 2, the strength of the glue injection colloid 3, the depth of thread threading and the distance between threads. And testing the tensile strength f of each anchor cable rod body according to the method in the step S2iAnd selecting the structural parameters of the improved anchor cable rod body with the maximum tensile strength as the optimal anchor cable rod body structural parameters.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A method for improving a high-strength bonding type basalt fiber bar anchor cable rod body structure is characterized by comprising the following steps:
s1 preparation anchor rope body of rod specifically includes: carrying out sand blasting treatment on the outer surface of the basalt fiber bar, processing two hollow steel sleeves, processing threads on the outer wall and the inner wall of each hollow steel sleeve, respectively sleeving the two hollow steel sleeves at two ends of the basalt fiber bar, and injecting glue into a gap between each hollow steel sleeve and the corresponding basalt fiber bar to manufacture an anchor cable bar body;
the test of S2 anchor rope body of rod specifically includes: enabling the basalt fiber bars in the middle of the anchor cable rod body to penetrate through the center-penetrating jack, arranging threaded connectors on two hollow steel sleeves of the anchor cable rod body, enabling the two threaded connectors to respectively abut against the center-penetrating jack, tensioning the basalt fiber bars through the center-penetrating jack in a load grading loading mode until the bars are damaged, and testing the tensile strength f of the anchor cable rod body1；
S3, repeating the step S1 to manufacture a plurality of improved anchor cable rod bodies, modifying one or more structural parameters of the sand blasting, the size and the length of the hollow steel sleeve and the strength of the threads and the glue injection colloid in the step S1 each time of manufacturing, and testing the tensile strength f of each anchor cable rod body according to the method in the step S2iAnd selecting the structural parameters of the improved anchor cable rod body with the maximum tensile strength as the optimal anchor cable rod body structural parameters.
2. The method for improving the rod body structure of the high-strength bonding type basalt fiber bar anchor cable in claim 1, wherein the method comprises the following steps: and in the step S1, the grain size of sand grains sprayed by the sand blasting treatment on the outer surface of the basalt fiber bar is 20-40 meshes.
3. The method for improving the rod body structure of the high-strength bonding type basalt fiber bar anchor cable in claim 1, wherein the method comprises the following steps: in the step S1, the bonding tensile strength of the hollow steel sleeve and the glue injection colloid is greater than 36MPa, and the compressive strength of the glue injection colloid is greater than 90 MPa.
4. The method for improving the rod body structure of the high-strength bonding type basalt fiber bar anchor cable in claim 1, wherein the method comprises the following steps: the length of the hollow steel sleeve is 20 times of the diameter of the basalt fiber rib after sand blasting.
5. The method for improving the rod body structure of the high-strength bonding type basalt fiber bar anchor cable in claim 1, wherein the method comprises the following steps: the material of the hollow steel sleeve is at least higher than 45 # steel, and the thickness of the pipe wall is more than 5 mm.
6. The method for improving the rod body structure of the high-strength bonding type basalt fiber bar anchor cable in claim 1, wherein the method comprises the following steps: the threaded connecting piece comprises a tray and a nut, the tray and the nut are all sleeved on the hollow steel sleeve, one side of the tray abuts against the center penetrating jack, the other end of the tray is connected with the nut, and the nut is in threaded connection with the hollow steel sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110394196.7A CN113107562B (en) | 2021-04-13 | 2021-04-13 | Transformation method of high-strength adhesive basalt fiber reinforced anchor cable rod body structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110394196.7A CN113107562B (en) | 2021-04-13 | 2021-04-13 | Transformation method of high-strength adhesive basalt fiber reinforced anchor cable rod body structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113107562A true CN113107562A (en) | 2021-07-13 |
| CN113107562B CN113107562B (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110394196.7A Active CN113107562B (en) | 2021-04-13 | 2021-04-13 | Transformation method of high-strength adhesive basalt fiber reinforced anchor cable rod body structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113622420A (en) * | 2021-07-26 | 2021-11-09 | 中国地质调查局武汉地质调查中心 | Bank side slope basalt fiber rib integrated anchoring structure and monitoring system thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106988310A (en) * | 2016-12-28 | 2017-07-28 | 南通沪誉玻璃钢制品有限公司 | A kind of glass fiber-reinforced polymer material, the anchor cable being made up of glass fiber-reinforced polymer material and construction technology |
| CN109736304A (en) * | 2019-01-14 | 2019-05-10 | 江苏东合南岩土科技股份有限公司 | The construction method of glass multiple anchor cable muscle, glass multiple anchor cable and anchor pole |
| CN110725312A (en) * | 2019-09-25 | 2020-01-24 | 东南大学 | Basalt fiber pre-stressed anchor cable system and anchoring method thereof |
| CN112176993A (en) * | 2020-10-23 | 2021-01-05 | 洛阳理工学院 | Preparation and tensioning method of composite reinforcement |
| CN112576291A (en) * | 2020-12-29 | 2021-03-30 | 中国地质调查局武汉地质调查中心(中南地质科技创新中心) | Anchor cable of basalt fiber rib and monitoring system thereof |
-
2021
- 2021-04-13 CN CN202110394196.7A patent/CN113107562B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106988310A (en) * | 2016-12-28 | 2017-07-28 | 南通沪誉玻璃钢制品有限公司 | A kind of glass fiber-reinforced polymer material, the anchor cable being made up of glass fiber-reinforced polymer material and construction technology |
| CN109736304A (en) * | 2019-01-14 | 2019-05-10 | 江苏东合南岩土科技股份有限公司 | The construction method of glass multiple anchor cable muscle, glass multiple anchor cable and anchor pole |
| CN110725312A (en) * | 2019-09-25 | 2020-01-24 | 东南大学 | Basalt fiber pre-stressed anchor cable system and anchoring method thereof |
| CN112176993A (en) * | 2020-10-23 | 2021-01-05 | 洛阳理工学院 | Preparation and tensioning method of composite reinforcement |
| CN112576291A (en) * | 2020-12-29 | 2021-03-30 | 中国地质调查局武汉地质调查中心(中南地质科技创新中心) | Anchor cable of basalt fiber rib and monitoring system thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113622420A (en) * | 2021-07-26 | 2021-11-09 | 中国地质调查局武汉地质调查中心 | Bank side slope basalt fiber rib integrated anchoring structure and monitoring system thereof |
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| Publication number | Publication date |
|---|---|
| CN113107562B (en) | 2023-10-13 |
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