CN215812114U - Basalt fiber bar anchor cable anchoring performance testing device - Google Patents
Basalt fiber bar anchor cable anchoring performance testing device Download PDFInfo
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- CN215812114U CN215812114U CN202121340069.0U CN202121340069U CN215812114U CN 215812114 U CN215812114 U CN 215812114U CN 202121340069 U CN202121340069 U CN 202121340069U CN 215812114 U CN215812114 U CN 215812114U
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- basalt fiber
- anchor cable
- grouting
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- 229920002748 Basalt fiber Polymers 0.000 title claims abstract description 84
- 238000012360 testing method Methods 0.000 title claims abstract description 43
- 238000004873 anchoring Methods 0.000 title claims abstract description 31
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 239000013307 optical fiber Substances 0.000 claims abstract description 12
- 239000013013 elastic material Substances 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 19
- 239000002002 slurry Substances 0.000 claims description 6
- 210000002435 tendon Anatomy 0.000 claims 12
- 238000003466 welding Methods 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 7
- 239000011151 fibre-reinforced plastic Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000011440 grout Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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Abstract
本实用新型提供一种玄武岩纤维筋锚索锚固性能测试装置，包括锚索锚固系统、围压系统和数据采集系统；锚索锚固系统包括试验台、玄武岩纤维筋、以及粘接于玄武岩纤维筋表面的分布式光纤，试验台的两端均设有竖直的挡板、以及分别设置于两挡板处的围压系统和外锚段锚具；围压系统包括围压套筒，围压套筒设置于挡板内侧并与挡板固定连接，围压套筒内部设有注浆腔和注压腔，注浆腔侧壁为弹性材质；数据采集系统包括与分布式光纤两端串接的调制解调仪和光栅、以及穿心千斤顶和测力计。本实用新型的有益效果：准确测量延展性能和蠕变性能，分析获取玄武岩纤维筋锚索的拉拔力、预应力损失、延展性能、蠕变特征等锚固性能。
The utility model provides a basalt fiber reinforcement anchor cable anchorage performance testing device, which comprises an anchor cable anchoring system, a confining pressure system and a data acquisition system; The distributed optical fiber of the test bench is provided with vertical baffles at both ends, and the confining pressure system and the outer anchorage anchors are respectively set at the two baffles; the confining pressure system includes a confining pressure sleeve, a confining pressure sleeve The cylinder is arranged on the inner side of the baffle and is fixedly connected with the baffle. There is a grouting cavity and a pressure injection cavity inside the confining pressure sleeve, and the side wall of the grouting cavity is made of elastic material; Modems and gratings, as well as feedthrough jacks and dynamometers. The beneficial effects of the utility model are: accurately measure the ductility and creep properties, and analyze and obtain the anchoring properties such as the pulling force, prestress loss, ductility and creep characteristics of the basalt fiber reinforced anchor cable.
Description
Technical Field
The utility model relates to the technical field of anchor cables, in particular to a basalt fiber bar anchor cable anchoring performance testing device.
Background
With the continuous development and progress of material science, a large number of novel fiber reinforced composite anchor rods (cables) are developed at home and abroad to replace the traditional steel anchor rods (cables) research work, wherein the tensile strength of basalt fiber bars is more than or equal to 1100MPa and can reach 4 times of that of common deformed steel bars, the density of the basalt fiber bars is 1/3-1/4 of common steel bars, the basalt fiber bars also have the advantages of good acid-base corrosion resistance, high stability under high temperature conditions, low raw material cost and the like, the basalt fiber bars are good substitutes for steel bars in rock-soil anchoring structures, have wide engineering application value, receive more and more attention in recent years, and anchor rod (cable) bars and anchoring bodies are not limited to steel bars and cement mortar any more.
At present, engineering and scientific research personnel try to apply basalt fiber reinforcement to actual engineering instead of metal anchor cable reinforcement, and how to accurately evaluate the anchoring performance (drawing force, prestress loss, extensibility and the like) of the basalt fiber reinforcement anchor cable is a precondition for engineering popularization and application and is also a key technical problem to be solved urgently when the novel basalt fiber reinforcement anchor cable is successfully applied. At the present stage, in the test of the anchoring performance of the indoor basalt fiber bar anchor cable, the stress action of surrounding rock at the anchoring section is not usually considered, the difference between the test condition and the actual stress state of the project is large, and the anchoring performance parameters cannot be accurately obtained.
SUMMERY OF THE UTILITY MODEL
In view of this, in order to solve the problem of evaluating the anchoring performance of the basalt fiber reinforced plastic anchor cable, an embodiment of the present invention provides a testing apparatus for the anchoring performance of the basalt fiber reinforced plastic anchor cable.
The embodiment of the utility model provides a basalt fiber bar anchor cable anchoring performance testing device, which comprises an anchor cable anchoring system, a confining pressure system and a data acquisition system, wherein the anchor cable anchoring system comprises a cable body, a cable body and a cable body;
the anchor cable anchoring system comprises a test bench, basalt fiber ribs horizontally arranged above the test bench and distributed optical fibers bonded on the surfaces of the basalt fiber ribs, wherein two ends of the test bench are respectively provided with a vertical baffle, and a confining pressure system and an outer anchor section anchorage device which are respectively arranged at the two baffles; the confining pressure system comprises a confining pressure sleeve arranged at one end of the test bed, the confining pressure sleeve is arranged at the inner side of the baffle, one end of the confining pressure sleeve is fixedly connected with the baffle, a detachable sealing element is arranged at the other end of the confining pressure sleeve, a grouting cavity and a grouting pressure cavity which are both annular are sequentially arranged in the confining pressure sleeve from inside to outside, the side wall of the grouting cavity is made of elastic materials, one end of the basalt fiber rib penetrates through the confining pressure sleeve and is anchored by grouting liquid in the grouting cavity, and the other end of the basalt fiber rib is anchored by the outer anchor section anchorage device;
the data acquisition system comprises a modem and a grating which are connected with the two ends of the distributed optical fiber in series, and a center-penetrating jack and a dynamometer which are arranged between the outer anchor segment anchorage and the end part of the test bed, wherein the basalt fiber bar penetrates through the center-penetrating jack and the dynamometer.
Furthermore, the outer anchor section anchorage device comprises an outer anchor disc and two base plates, the other end of the basalt fiber rib sequentially penetrates through the baffle, the dynamometer, the center-penetrating jack and the outer anchor disc to be anchored by the outer anchor disc, and the two base plates are respectively arranged between the dynamometer and the center-penetrating jack and between the dynamometer and the baffle.
Furthermore, the confining pressure system further comprises a confining pressure hydraulic pump, the grouting cavity and the injection cavity are coaxially arranged, the basalt fiber ribs are arranged on the axes of the basalt fiber ribs and the injection cavity, grouting holes are formed in the end portions of the grouting cavity, the grouting cavity is used for injecting slurry around the basalt fiber ribs to form slurry, a pressure injection port communicated with the injection cavity is formed in the surface of the confining pressure sleeve, and the confining pressure hydraulic pump is connected with the pressure injection port and used for applying confining pressure on the slurry.
Furthermore, the sealing element is two semicircular sealing plates, semicircular holes are formed in the circle centers of the two sealing plates, the two sealing plates and the end opening of the confining pressure sleeve are bonded and spliced to form a complete circular plate, and the two semicircular holes are spliced to form a complete circular hole for the basalt fiber rib to pass through.
Further, the confining pressure system also comprises a confining pressure hydraulic gauge which is connected with the confining pressure hydraulic pump and used for measuring applied confining pressure.
Furthermore, a plurality of clamping grooves are formed in the surface of the confining pressure sleeve, and the confining pressure sleeve is connected with the baffle in a clamped mode and is fixed in a welded mode through the clamping grooves.
Furthermore, the center-penetrating jack is also provided with a jack hydraulic pump and a jack hydraulic gauge, and the jack hydraulic pump is respectively connected with the center-penetrating jack and the jack hydraulic gauge.
The technical scheme of the basalt fiber bar anchor cable anchoring performance testing device provided by the embodiment of the utility model has the beneficial effects that: the basalt fiber bar anchor cable is characterized in that a distributed optical fiber and a detected basalt fiber bar are bonded into a whole, deformation detection of the basalt fiber bar is achieved by detecting deformation of the distributed optical fiber, confining pressure of surrounding rock mass of an anchor cable anchoring section is simulated by applying pressure to a confining pressure sleeve, extensibility and creep performance are accurately measured under the confining pressure condition, the drawing force of the basalt fiber bar is measured through a dynamometer, anchoring performances such as drawing force, prestress loss, extensibility and creep characteristic of the basalt fiber bar anchor cable are obtained through analysis, and accurate measurement and assessment of the anchoring performance of the basalt fiber bar anchor cable are achieved.
Drawings
FIG. 1 is a top view of a basalt fiber reinforced plastic anchor cable anchoring performance testing device of the present invention;
fig. 2 is a schematic view of the confining pressure sleeve 4 of fig. 1.
In the figure: 1-test bed, 2-basalt fiber rib, 3-distributed optical fiber, 4-confining pressure sleeve, 5-grouting cavity, 6-grouting body, 7-baffle, 8-grating, 9-modem, 10-center-penetrating jack, 11-outer anchor disk, 12-dynamometer, 13-backing plate, 14-jack hydraulic pump, 15-jack hydraulic gauge, 16-confining pressure hydraulic pump, 17-confining pressure hydraulic gauge, 18-grouting cavity, 19-clamping groove, 20-grouting opening, 21-grouting opening and 22-grouting cavity side wall.
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.
Referring to fig. 1 and 2, an embodiment of the present invention provides a basalt fiber reinforced plastic anchor cable anchoring performance testing apparatus, including an anchor cable anchoring system, a confining pressure system, and a data acquisition system.
The anchor cable anchoring system comprises a test bench 1, basalt fiber ribs 2 horizontally arranged above the test bench 1 and distributed optical fibers 3 bonded on the surfaces of the basalt fiber ribs 2, wherein two ends of the test bench 1 are respectively provided with a vertical baffle 7, and a confining pressure system and an outer anchor section anchorage device which are respectively arranged at the two baffles 7, the confining pressure system anchors one end of the basalt fiber ribs 2, and the outer anchor section anchorage device anchors the other end of the basalt fiber ribs 2.
Specifically, baffles 7 are arranged at two ends of the test bed 1, through holes for the basalt fiber ribs 2 to pass through are reserved in the two baffles 7, and two ends of the basalt fiber ribs 2 bonded with the distributed optical fibers 3 respectively pass through the baffles 7 at two ends of the test bed 1.
The confining pressure system is arranged at one end of the test bed 1 and mainly comprises a confining pressure sleeve 4 arranged at the end part of the test bed 1.
Referring to fig. 2, the confining pressure sleeve 4 is disposed inside the baffle 7 and is fixedly connected to the baffle 7. The confining pressure sleeve 4 is located on the inner side of the end portion of the test bed 1, a plurality of clamping grooves 19 are formed in the surface of the confining pressure sleeve 4, and one end of the confining pressure sleeve 4 is clamped into the baffle 7 at the end portion of the test bed 1 through the clamping grooves 19 and is fixedly welded with the baffle 7. The other end of the confining pressure sleeve 4 is provided with a detachable sealing element which can be set into two semicircular sealing plates, the circle centers of the two sealing plates are provided with semicircular holes, the two sealing plates are arranged at the end, away from the confining pressure sleeve 4, of one end of the baffle 7 and are fixedly bonded with the end, and the two sealing plates are spliced into a complete circular plate, and the semicircular holes are spliced into a complete circular hole for the basalt fiber rib 2 to pass through.
The basalt fiber ribs 2 are arranged on the axis of the confining pressure sleeve 4. The two ends of the confining pressure sleeve 4 are closed, the inside of the confining pressure sleeve is sequentially provided with a grouting cavity 5 and a grouting pressure cavity 18 which are both annular, the grouting cavity 5 surrounds the basalt fiber ribs 2, and the side wall 22 of the grouting cavity is made of elastic materials, such as elastomers such as rubber. Specifically, the grouting cavity 5 and the injection pressing cavity 18 are coaxially arranged, and the basalt fiber rib 2 is arranged on the axes of the grouting cavity and the injection pressing cavity. The annular space between the side wall 22 of the grouting cavity and the outer wall of the confining pressure sleeve 4 forms the grouting cavity 18, the end part of the grouting cavity 5 is provided with grouting holes, slurry is injected around the basalt fiber ribs 2 through the grouting holes 20, and the grouting body 6 is formed after the slurry is solidified. During grouting, plastic soft mud can be used for coating the contact parts of the basalt fiber ribs 2, the baffle 7 and the two sealing plates, so that the sealing effect is enhanced. In addition, after the grouting body 6 is formed, the two sealing plates can be detached and taken down so as to prevent the sealing plates from influencing the forced movement of the basalt fiber bars 2 and the grouting body 6.
Confining pressure system still includes confining pressure hydraulic pump 16 and confining pressure hydraulic pressure table 17, confining pressure sleeve 4 surface be equipped with the notes pressure port 21 of 18 intercommunications in notes pressure chamber, confining pressure hydraulic pump 16 connects notes pressure port 21 can pass through notes pressure port 21 is right confining pressure sleeve 4 inside injection hydraulic oil, through hydraulic oil is right grouting chamber lateral wall 22 applys pressure, and transmits extremely grout body 6, right grout body 6 applys the confining pressure. The confining pressure hydraulic gauge 17 is connected with the confining pressure hydraulic pump 16 and is used for measuring the pressure for applying confining pressure.
The outer anchor section anchorage device is arranged at the other end of the test bed 1 and comprises an outer anchor disc 11 and two backing plates 13, the other end of the basalt fiber rib 2 sequentially penetrates through the baffle 7, the dynamometer 12, the center-penetrating jack 10 and the outer anchor disc 11, and the outer anchor disc 11 is matched with the baffle 7 at the end part of the test bed 1 to anchor the other end of the basalt fiber rib 2. And the two backing plates 13 are respectively arranged between the dynamometer 12 and the piercing jack 10 and between the dynamometer 12 and the baffle 7. When the ultimate pullout resistance and ultimate ductility of the anchor cable are measured, the two ends of the basalt fiber bar 2 are respectively anchored through the outer anchor disc 11 and the grout 6, so that the basalt fiber bar 2 can be tensioned and straightened.
The data acquisition system comprises a modem 9 and a grating 8 which are connected with two ends of the distributed optical fiber 3 in series, and a center-penetrating jack 10 and a dynamometer 12 which are arranged between the external anchor segment anchorage and the baffle 7. Here the modem 9 and grating 8 cooperate to measure the deformation of the distributed optical fibre 3. The center-penetrating jack 10 and the dynamometer 12 are arranged on one side of the test bed 1, which is located on the outer anchor section anchorage device, the center-penetrating jack 10 and the dynamometer 12 are sequentially arranged between the outer cap anchor plate 11 and the baffle 7, and the basalt fiber reinforcement 2 penetrates through the center-penetrating jack 10 and the dynamometer 12. The center-penetrating jack 10 is used for exerting a drawing force on the basalt fiber bar 2, and the dynamometer 12 is used for measuring the drawing force borne by the basalt fiber bar 2. In addition, tie plates 13 may be provided between the through-center jacks 10 and the load cells 12, and between the load cells 12 and the stop plate 7, to increase the stability of the anchoring system.
In this embodiment, the center-penetrating jack 10 is further provided with a jack hydraulic pump 14 used in cooperation with the center-penetrating jack 10, and a jack hydraulic gauge 15 connected to the jack hydraulic pump 14, where the jack hydraulic pump 14 is used for injecting pressure to the center-penetrating jack 10 to enable the center-penetrating jack to work, and the jack hydraulic gauge 15 collects pump injection pressure of the jack hydraulic pump 14.
Further, referring to fig. 1 and 2, the basalt fiber reinforced plastic anchor cable anchoring performance testing apparatus can simulate performance tests of the basalt fiber reinforced plastic 2 under different confining pressure limiting conditions and a certain confining pressure condition. Specifically, grouting is conducted on the grouting cavity 5 through the grouting opening 20 to form a grouting body 6, the basalt fiber ribs 2 are tightly wrapped, and the confining pressure sleeve is used for exerting pressure to simulate confining pressure of a surrounding rock body of the anchor rope anchoring section. Under different confining pressure conditions or certain confining pressure conditions, drawing force is applied to the basalt fiber rib 2 through the center-penetrating jack 10, when the basalt fiber rib 2 is subjected to the drawing force, surrounding pressure is simulated through the surrounding pressure sleeve 4, the basalt fiber rib 2 can be directly separated from the grout 6, the grout 6 can also be driven to be separated from the surrounding pressure sleeve 4, and performance tests of the basalt fiber rib 6 in different confining pressure limiting conditions at the anchoring section can be simulated. The deformation of the basalt fiber bar 2 is measured by the modem 9 to determine the ductility and creep properties thereof, and the drawing force applied to the basalt fiber bar 2 is measured by the dynamometer 12.
The specific method for applying the drawing force to the basalt fiber bar 2 by the center-penetrating jack 10 comprises the following steps: applying a certain drawing force to the basalt fiber bar 2, and simulating the application of prestress of an anchor cable; simulating the anchor cable prestress grading loading process by gradually increasing the applied drawing force in stages; when the cable is loaded to a limit load, the basalt fiber ribs 2 are damaged, and the limit pulling resistance and the limit extensibility of the anchor cable can be obtained; and loading to a certain design load, keeping stability, measuring deformation and prestress change values of the basalt fiber bar 2 at different positions to different degrees, and simulating to obtain the creep characteristic and the prestress loss change rule of the anchor cable.
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 utility model, 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 (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121340069.0U CN215812114U (en) | 2021-06-16 | 2021-06-16 | Basalt fiber bar anchor cable anchoring performance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121340069.0U CN215812114U (en) | 2021-06-16 | 2021-06-16 | Basalt fiber bar anchor cable anchoring performance testing device |
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| Publication Number | Publication Date |
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| CN215812114U true CN215812114U (en) | 2022-02-11 |
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|---|---|---|---|
| CN202121340069.0U Active CN215812114U (en) | 2021-06-16 | 2021-06-16 | Basalt fiber bar anchor cable anchoring performance testing device |
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| CN (1) | CN215812114U (en) |
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2021
- 2021-06-16 CN CN202121340069.0U patent/CN215812114U/en active Active
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