CN111794222A - Intelligent anchor rod controlled by hydraulic servo system - Google Patents
Intelligent anchor rod controlled by hydraulic servo system Download PDFInfo
- Publication number
- CN111794222A CN111794222A CN202010632111.XA CN202010632111A CN111794222A CN 111794222 A CN111794222 A CN 111794222A CN 202010632111 A CN202010632111 A CN 202010632111A CN 111794222 A CN111794222 A CN 111794222A
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- anchor rod
- anchoring
- ring structure
- hydraulic servo
- servo system
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- 238000004873 anchoring Methods 0.000 claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 239000000835 fiber Substances 0.000 claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims description 14
- 229920001410 Microfiber Polymers 0.000 claims description 10
- 239000003658 microfiber Substances 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D21/02—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection having means for indicating tension
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
- E02D2300/0034—Steel; Iron in wire form
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
An intelligent anchor rod controlled by a hydraulic servo system comprises an anchor rod body, a loading device positioned at one end of the anchor rod body and a miniature fiber bragg grating strain sensor stuck on the anchor rod body; the anchor rod body comprises a plurality of parallel steel strands; the loading device comprises an outer ring structure and an inner ring structure, the outer ring structure adopts a large-scale through type hydraulic jack structure, and the outer end of a piston of the outer ring structure is provided with the inner ring structure; the inner ring structure is a disc type structural member, a plurality of through holes are formed in the disc type structural member along the circumferential direction of the disc type structural member, and an anchoring structure is fixedly arranged in each through hole; the anchoring structure adopts a small-sized through hydraulic jack structure, a single-hole tool anchor is installed at the front end of a piston rod of the anchoring structure, an anchoring hole is formed in the center of the single-hole tool anchor, and a steel strand is anchored in the anchoring hole; the hydraulic servo system drives and connects the outer ring structure and the anchoring structure. The invention can monitor and control the stress condition in the anchor rod in real time, reduce the maintenance difficulty in the operation stage of the anchor rod and ensure the stability of the supporting structure.
Description
Technical Field
The invention relates to the field of engineering monitoring, in particular to an intelligent anchor rod controlled by a hydraulic servo system.
Background
As a supporting structure capable of actively improving the self-strength and self-stability of a rock-soil body, the anchor rod is widely applied to building, water conservancy, electric power, mine roadway, slope reinforcement and foundation pit support due to the advantages of low manufacturing cost, simplicity and convenience in construction and short construction period. As the field of anchor applications expands, engineers have identified a series of problems in their use. For example, a plurality of anchor rods are generally applied to the foundation pit engineering, the anchor rods are additionally arranged when the designed depth is excavated, then downward excavation is continued, a second anchor rod is additionally arranged, and the process is repeated until the foundation pit excavation is completed. The working surfaces of the first few anchor rods will disappear as the excavation process progresses. If the later-stage supporting structure has larger displacement deformation, the deformation can be quickly and effectively controlled by adjusting the stress of a plurality of anchor rods around the position where the supporting structure deforms greatly. But the disappearance of stock working face for the stock atress adjustment work degree of difficulty is great, and construction unit generally can take other modes to consolidate supporting construction, does the consuming time and wasting power like this, and can not control in the very first time. If the horizontal displacement of the supporting structure is not controlled in time, safety accidents may be induced. In addition, there is a loss problem with the use of bolts that are always prestressed. Only when the prestress of the anchor rod meets a certain requirement can the anchor rod be called active support, and once the prestress of the anchor rod does not meet the requirement, the active support effect can be greatly influenced, so that potential safety hazards are caused.
How to realize the real-time monitoring of the stress and loss state of the anchor rod and ensure the long-term safety and stability of the rock-soil anchoring engineering is also the key of the development of the rock-soil anchoring technology. At present, the method for testing the stress and damage states of the anchor rods at home and abroad mainly comprises two types: the method comprises the following steps of firstly, detecting reflection difference of electromagnetic waves, sound waves and the like in different dielectric layers; and secondly, through a drawing test, the stress and damage states of the anchor rod under the drawing action are directly tested by adopting a force measuring anchor rod, an anchor rod drawing meter, a differential resistance strain gauge, a resistance strain gauge and the like. However, these testing methods have the disadvantages of being easily interfered, having large testing error, poor durability and long-term stability, and are difficult to meet the long-term stable monitoring requirements under the environments of hidden, humid and rusty rock and soil anchoring engineering. And the anchor rods are applied to a certain project and are thousands of, and the number is huge, so that the anchor rods are difficult to be comprehensively considered in actual monitoring.
In recent years, the internet of things technology is continuously applied to various fields. And new technologies such as optical fiber and grating sensing technologies are developed rapidly, so that a new idea and a new tool are provided for engineering monitoring work. Aiming at the defects that the existing anchor rod anchoring system is high in detection cost and cannot meet the long-term monitoring requirement, the invention provides the intelligent anchor rod controlled by the hydraulic servo system, the anchor rod can receive the data of the miniature fiber bragg grating strain sensor in real time, automatically process and analyze the data, and the stress of the anchor rod is controlled by the system according to the real-time data, so that the structural safety is ensured.
Disclosure of Invention
In order to overcome the problems, the invention provides an intelligent anchor rod controlled by a hydraulic servo system.
The technical scheme adopted by the invention is as follows: an intelligent anchor rod controlled by a hydraulic servo system comprises an anchor rod body, a loading device positioned at one end of the anchor rod body and a miniature fiber bragg grating strain sensor stuck on the anchor rod body;
the anchor rod body is divided into an anchoring section and a free section, the anchor rod body comprises a plurality of parallel steel strands, and the steel strands penetrate through the loading device and are fixed in anchoring holes of the loading device; miniature fiber grating strain sensors are adhered to the outer surface of the steel strand at intervals along the axial direction of the steel strand; the miniature fiber bragg grating strain sensor is used for monitoring the bearing capacity of the anchor rod and the stress strain of the steel strand; the micro fiber bragg grating strain sensor is in signal connection with the controller, detection data are transmitted to the controller, and the controller is in signal connection with the hydraulic servo system;
the loading device comprises an outer ring structure and an inner ring structure, and the outer ring structure is fixed on the waist rail through bolts; the outer ring structure adopts a large-scale feed-through hydraulic jack structure, and the outer end of a piston of the outer ring structure is provided with an inner ring structure; the inner ring structure is a disc type structural member, a plurality of through holes are formed in the disc type structural member along the circumferential direction of the disc type structural member, and an anchoring structure is fixedly arranged in each through hole; the anchoring structure adopts a small-sized through hydraulic jack structure, a single-hole tool anchor is installed at the front end of a piston rod of the anchoring structure, an anchoring hole is formed in the center of the single-hole tool anchor, and a steel strand is anchored in the anchoring hole; the hydraulic servo system drives and connects the outer ring structure and the anchoring structure.
Further, the arrangement density of the micro fiber grating strain sensors on the anchoring section is greater than that of the micro fiber grating strain sensors on the free section.
Further, the controller is electrically connected with the alarm, and when the data collected by the miniature fiber grating strain sensor is lower than a preset threshold value, the controller triggers the alarm to be turned on.
Further, the controller is connected with a remote terminal in a wireless communication mode, and the remote terminal is a computer, a mobile phone or a tablet computer.
Further, a protective cover is arranged outside the loading device.
Furthermore, plastic pipes are sleeved outside the steel strand and the miniature fiber grating sensor.
The invention has the beneficial effects that:
1) the maintenance difficulty of the anchor rod in the operation stage can be reduced, the detection efficiency of the anchor rod in the operation stage is improved, the service life of the grating is longer compared with that of a strain gauge, and long-term monitoring can be carried out through a reserved port in the anchor rod operation stage;
2) by adopting the hydraulic servo system, the stress of the anchor rod can be controlled in real time, so that the prestress value of the anchor rod is kept at a fixed value, and the stress of the anchor rod can be adjusted according to real-time data, thereby ensuring the stability of a supporting structure;
3) the anchor rods at multiple positions of the supporting structure can be monitored simultaneously, intelligent anchor rods can be implanted into multiple positions according to monitoring requirements, and overall monitoring of one region is achieved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of the loading device.
Description of reference numerals: the device comprises a protective cover 1, a loading device 2, a steel strand 3, a miniature fiber bragg grating strain sensor 4, a hole 5, a data transmission line 6, an outer ring structure 7, an inner ring structure 8, an anchoring hole 9 and a hydraulic servo system 10.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the orientations or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to the attached drawings, the intelligent anchor rod controlled by a hydraulic servo system comprises an anchor rod body, a loading device positioned at one end of the anchor rod body and a miniature fiber bragg grating strain sensor adhered to the anchor rod body;
the anchor rod body is divided into an anchoring section and a free section, the anchor rod body comprises a plurality of parallel steel strands 3, and the steel strands 3 penetrate through the loading device 2 and are fixed in anchoring holes of the loading device 2; miniature fiber grating strain sensors 4 are adhered to the outer surface of the steel strand 3 at intervals along the axial direction of the steel strand, and the miniature fiber grating strain sensors 4 are used for detecting the bearing capacity and the stress strain of the steel strand 3; the number and density of the micro fiber grating strain sensors 4 can be adjusted according to actual engineering, and the micro fiber grating strain sensors can be properly encrypted at the anchoring section. The micro fiber bragg grating strain sensor 4 is in signal connection with the controller, and transmits detection data to the controller, and the controller is in signal connection with the hydraulic servo system 10; the outside cover of steel strand wires 3 and miniature fiber grating sensor 4 is equipped with the plastic tubing, and the plastic tubing can slow down steel strand wires and corrode, guarantees miniature fiber grating strain sensor survival rate.
The loading device 2 comprises an outer ring structure 7 and an inner ring structure 8, the outer ring structure 7 is fixed on the waist rail through bolts, and a protective cover is arranged outside the outer ring structure 7; the outer ring structure 7 adopts a large-scale through type hydraulic jack structure, and the outer end of a piston of the outer ring structure 7 is provided with an inner ring structure 8; the inner ring structure 8 is a disc type structural member, a plurality of through holes are formed in the disc type structural member along the circumferential direction of the disc type structural member, the number of the through holes is customized according to the design, and an anchoring structure is fixedly arranged in each through hole; the anchoring structure adopts a small-sized through hydraulic jack structure, a single-hole tool anchor is installed at the front end of a piston rod of the anchoring structure, an anchoring hole 9 is formed in the center of the single-hole tool anchor, and a steel strand 3 is anchored in each anchoring hole 9; the hydraulic servo system 10 drives the connecting outer ring structure and the anchoring structure.
The controller is electrically connected with the alarm, and when the data collected by the miniature fiber bragg grating strain sensor is lower than a preset threshold value, the controller triggers the alarm to be started. The controller is connected with a remote terminal in a wireless communication mode, and the remote terminal is a computer, a mobile phone or a tablet computer.
Anchor rod construction: the manufactured anchor rod is placed into a hole 5 which is drilled in advance, the loading device 2 and the protective cover 1 are installed in sequence from inside to outside, and each steel strand 3 is ensured to pass through one anchoring hole 9. Before grouting, whether the micro fiber grating strain sensor 4, the data transmission line 6 and the hydraulic servo system work normally or not is tested. And after grouting is finished, tensioning of the anchor rod can be carried out. When prestress is applied, the range of the loading device is small, the conventional hydraulic jack can be used for firstly tensioning to a design value, and the steel strand 3 is locked by the loading device 2.
Anchor rod operation: monitoring data of the supporting structure is fed back to the controller through the fiber bragg grating strain sensor 4 and other monitoring equipment, the controller conducts preliminary analysis according to the preset value, and if certain monitoring data exceed a threshold value, the controller automatically gives an alarm and reports a dangerous case. In addition, the operator can adjust the stress condition of the anchor rod in real time through the loading device 2 according to the actual condition. For example, when the anchor rod is stretched, the condition that the stress of the single steel strand 3 is uneven may occur, and the overall stress of the anchor rod is affected when the stress of the single steel strand 3 is too large or too small. At this time, the controller can send an instruction to the hydraulic servo system 10, and the anchoring structure is utilized to hydraulically adjust the stress of the single steel strand 3. If the anchor rod prestress loss is too much, the prestress of the whole anchor rod needs to be adjusted, and the outer ring structure of the loading device is used for carrying out hydraulic adjustment on the whole anchor rod. In addition, the controller can simultaneously control a plurality of anchor rods in one area, and the anchor rods in the whole area are simultaneously adjusted, so that the overall control of the supporting structure is achieved.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but rather by the equivalents thereof as may occur to those skilled in the art upon consideration of the present inventive concept.
Claims (5)
1. The utility model provides an intelligent stock by hydraulic servo control which characterized in that: the anchor rod comprises an anchor rod body, a loading device positioned at one end of the anchor rod body and a miniature fiber bragg grating strain sensor adhered to the anchor rod body;
the anchor rod body is divided into an anchoring section and a free section, the anchor rod body comprises a plurality of parallel steel strands, and the steel strands penetrate through the loading device and are fixed in anchoring holes of the loading device; miniature fiber bragg grating strain sensors are stuck on the outer surface of the steel strand at intervals along the axial direction of the steel strand, and the miniature fiber bragg grating strain sensors are used for monitoring the bearing capacity of the anchor rod and the stress strain of the steel strand; the micro fiber bragg grating strain sensor is in signal connection with the controller, detection data are transmitted to the controller, and the controller is in signal connection with the hydraulic servo system;
the loading device comprises an outer ring structure and an inner ring structure, and the outer ring structure is fixed on the waist rail through bolts; the outer ring structure adopts a large-scale feed-through hydraulic jack structure, and the outer end of a piston of the outer ring structure is provided with an inner ring structure; the inner ring structure is a disc type structural member, a plurality of through holes are formed in the disc type structural member along the circumferential direction of the disc type structural member, and an anchoring structure is fixedly arranged in each through hole; the anchoring structure adopts a small-sized through hydraulic jack structure, a single-hole tool anchor is installed at the front end of a piston rod of the anchoring structure, an anchoring hole is formed in the center of the single-hole tool anchor, and a steel strand is anchored in the anchoring hole; the hydraulic servo system drives and connects the outer ring structure and the anchoring structure.
2. An intelligent anchor rod controlled by a hydraulic servo system as claimed in claim 1, wherein: the arrangement density of the micro fiber bragg grating strain sensors on the anchoring section is greater than that of the micro fiber bragg grating strain sensors on the free section.
3. An intelligent anchor rod controlled by a hydraulic servo system as claimed in claim 1, wherein: the controller is electrically connected with the alarm, and when the data collected by the miniature fiber grating strain sensor is lower than a preset threshold value, the controller triggers the alarm to be started.
4. An intelligent anchor rod controlled by a hydraulic servo system as claimed in claim 1, wherein: the controller is connected with a remote terminal in a wireless communication mode, and the remote terminal is a computer, a mobile phone or a tablet computer.
5. An intelligent anchor rod controlled by a hydraulic servo system as claimed in claim 1, wherein: and plastic pipes are sleeved outside the steel strand and the miniature fiber grating sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010632111.XA CN111794222A (en) | 2020-07-02 | 2020-07-02 | Intelligent anchor rod controlled by hydraulic servo system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010632111.XA CN111794222A (en) | 2020-07-02 | 2020-07-02 | Intelligent anchor rod controlled by hydraulic servo system |
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| Publication Number | Publication Date |
|---|---|
| CN111794222A true CN111794222A (en) | 2020-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010632111.XA Pending CN111794222A (en) | 2020-07-02 | 2020-07-02 | Intelligent anchor rod controlled by hydraulic servo system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202090A (en) * | 2021-04-15 | 2021-08-03 | 中国葛洲坝集团第一工程有限公司 | Tension type anchoring device capable of monitoring deformation and construction method thereof |
-
2020
- 2020-07-02 CN CN202010632111.XA patent/CN111794222A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202090A (en) * | 2021-04-15 | 2021-08-03 | 中国葛洲坝集团第一工程有限公司 | Tension type anchoring device capable of monitoring deformation and construction method thereof |
| CN113202090B (en) * | 2021-04-15 | 2024-03-12 | 中国葛洲坝集团第一工程有限公司 | Tensioning type anchoring device capable of monitoring deformation and construction method thereof |
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