CN205049415U - Detect optic fibre and harmonious test device who warp of soil body - Google Patents
Detect optic fibre and harmonious test device who warp of soil body Download PDFInfo
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- CN205049415U CN205049415U CN201520625252.3U CN201520625252U CN205049415U CN 205049415 U CN205049415 U CN 205049415U CN 201520625252 U CN201520625252 U CN 201520625252U CN 205049415 U CN205049415 U CN 205049415U
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- soil body
- optic fibre
- optical fiber
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Abstract
The utility model relates to a detect optic fibre and harmonious test device who warp of soil body. It includes mold box, the fixed spout of optic fibre, optic fibre, scale plate, bearing plate, jack, pressure cell and pressure collecting appearance, the mold box is glued by tetragonal body steel structural framework, structure and is located six organic glass and constitutes, mold box front side both ends all are equipped with the fixed spout of optic fibre, the optic fibre level is in stretched form, and its both ends are the fusiformis structure, in the fixed spout of this fusiformis structure embedding optic fibre, and can be along fixing spout vertical migration, the scale plate is pasted on the organic glass of preceding department, the bearing plate is located the organic glass above the mold box, is equipped with pressure cell and jack on it in proper order, jack connection pressure gathers the appearance. The utility model discloses the different physics mechanics parameter soil bodys of detectable with adopt the harmonious deformation degree between the different packaging technology optic fibre, for optic fibre under the different geological conditionss select for use and technology was buried underground to optic fibre sureness provides the data support.
Description
Technical field
The utility model belongs to technical field of civil engineering, specifically, relates to the test unit of a kind of detection fiber and soil body compatible deformation.
Background technology
First optical fiber sensing technology is applied to xoncrete structure safety detection by Mendez in 1989 etc., it applies by the personnel of state's association area such as the U.S., Canada, Japan in building, hydraulic engineering subsequently, saltyly exert in phase base Hydropower Station dam, with the health status of Real-Time Monitoring dam concrete structure as distributed optical fiber stress strain transducer is arranged on by Fo Meng university of the U.S. in 1992.Along with reaching its maturity of Distributed Optical Fiber Sensing Techniques, be directly embedded in the soil body by sensor fibre, space distribution and the change thereof of the parameter such as ess-strain, displacement, temperature of the monitoring soil body become possibility.But after the soil body imbedded by optical fiber, the degree of coupling of optical fiber and the soil body, namely the inspection of the ability of both compatible deformations does not have dedicated experiments instrument, and both harmony directly determines the reflection degree of optical fiber to soil body true strain all the time.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides that a kind of economy saves time, the test unit of the detection fiber of convenient and efficient and soil body compatible deformation.
The test unit of a kind of detection fiber described in the utility model and soil body compatible deformation, described test unit comprises model casing 1, chute 2 fixed by optical fiber, optical fiber 3, scaleplate 4, bearing plate 5, lifting jack 6, pressure cell 7 and pressure acquisition instrument 8; Described model casing 1 is made up of tetragonal body steel structure frame 101, structure glue 102 and the organic glass 103 that is positioned at six; On front side of described model casing 1, two ends are equipped with optical fiber and fix chute 2; Described optical fiber 3 level is in tension, and its two ends are fusiformis structure 301, and this fusiformis structure 301 embeds optical fiber and fixes in chute 2, can along fixing chute 2 vertically movement; Described scaleplate 4 is pasted on the organic glass 103 located above; Described bearing plate 5 is positioned at the organic glass 103 above model casing 1, it is provided with successively pressure cell 7 and lifting jack 6; Described lifting jack 6 Bonding pressure Acquisition Instrument 8.
The test unit of a kind of detection fiber described in the utility model and soil body compatible deformation, described scaleplate 4 is transparent material.
The test unit of a kind of detection fiber described in the utility model and soil body compatible deformation, described model casing 1 size length × wide × height is 60cm × 30cm × 30cm.
The test unit of a kind of detection fiber described in the utility model and soil body compatible deformation, described steel structure frame 101 adopts " L " type equal angle to be welded, the long 4cm of this leg of angle, the thick 2.8mm of limb.
The test unit of a kind of detection fiber described in the utility model and soil body compatible deformation, described structure glue 102 is epoxy resin adhesive.
The test unit of a kind of detection fiber described in the utility model and soil body compatible deformation, described organic glass 103 is the tempered glass of thickness 1cm.
Compared with prior art, detection fiber described in the utility model and the test unit of soil body compatible deformation can detect the different physical and mechanical parameter soil body and adopt the compatible deformation degree between different packaging technology optical fiber, for optical fiber under different geological conditions select and the determination that technique (digging up and filling in, well cementing) buried underground by optical fiber provides data supporting, make monitoring result more reliable, and device is simple and practical, visualization is high, can be widely used in adopting in the Geotechnical Engineering of fiber-optic monitoring.
Accompanying drawing explanation
Fig. 1: test unit stereographic map; Fig. 2: test unit vertical view; Fig. 3: test unit right view; Fig. 4: Local map on front side of chute; Fig. 5: Local map on the left of chute; Model casing-1, steel structure frame-101, structure glue-102, organic glass-103, optical fiber fix chute-2, optical fiber-3, fusiformis structure-301, scaleplate-4, bearing plate-5, lifting jack-6, pressure cell-7, pressure acquisition instrument-8.
Embodiment
Be described further below in conjunction with the test unit of specific embodiment to detection fiber described in the utility model and soil body compatible deformation, but protection domain of the present utility model is not limited to this.
Embodiment 1
A test unit for detection fiber and soil body compatible deformation, described test unit comprises model casing 1, chute 2 fixed by optical fiber, optical fiber 3, scaleplate 4, bearing plate 5, lifting jack 6, pressure cell 7 and pressure acquisition instrument 8; Described model casing 1 is made up of tetragonal body steel structure frame 101, structure glue 102 and the organic glass 103 that is positioned at six; On front side of described model casing 1, two ends are equipped with optical fiber and fix chute 2; Described optical fiber 3 level is in tension, and its two ends are fusiformis structure 301, and this fusiformis structure 301 embeds optical fiber and fixes in chute 2, can along fixing chute 2 vertically movement; Described scaleplate 4 is pasted on the organic glass 103 located above; Described bearing plate 5 is positioned at the organic glass 103 above model casing 1, it is provided with successively pressure cell 7 and lifting jack 6; Described lifting jack 6 Bonding pressure Acquisition Instrument 8.Described scaleplate 4 is transparent material.
Certain expressway slope top layer soil body physical and mechanical parameter is elastic model 50MPa, Poisson ratio 0.38, cohesive strength 18kPa, angle of friction 16.5 °, density 1690kg/m
3, for adopting the distortion of distributed optical fiber sensing Slope table, optical fiber adopts diameter to be the armored fiber optic of 5mm, and optical fiber adopts grooving backfill, now need carry out backfilling the soil body and the compatible deformation parameter experiment burying optical fiber underground.Intend adopting this detection fiber to be 60cm × 30cm × 30cm with the test device systematic model box size length × wide × height of soil body compatible deformation.Model casing steel structure frame adopts " L " type equal angle to be welded, the long 4cm of leg of angle, the thick 2.8mm of limb.Thickness is that the tempered glass of 1cm is bonded to concordant of steel structure frame by employing epoxy resin adhesive.Soil body 5cm one deck layering of digging out of side slope being slotted loads in model casing, and compaction in layers, controls compaction by density.After compacting 4 layers, will embed optical fiber chute with fusiformis structure monitoring optical fiber two ends, after fusiformis structural embeddedness chute, optical fiber horizontal is in lacing wire state.Optical fiber the latter half contacts with compacted fill.Optical fiber is close to glass, loads the 5cm soil body on optical fiber, keep optical fiber elongated all with glass close contact, to keep the visuality of optical fiber, compacting, backfill the last 5cm soil body, compacting.Bearing plate placed and buries side underground near optical fiber in the middle part of soil body surface, apart from glass surface 5cm, aliging with model casing center line.Pressure cell is placed into bearing plate top, align center.Lifting jack is positioned over pressure cell top, alignment.Pressure cell Bonding pressure Acquisition Instrument, force value returns to zero.With lifting jack imposed load step by step, read force value, read fibre strain value by transparent scale paper, obtain pressure and fibre strain curve.On original soil volume density basis, soil body density parameter is filled in adjustment, repeats above-mentioned test, obtains many pressure and fibre strain curve.Choose in test loading procedure, pressure and fibre strain curve law are strong, the soil body and optical fiber close contact all the time, the filling soil body that nothing is come to nothing, and are and the filling soil body that this type optical fiber compatible deformation is effective.When burying optical fiber backfill soil body at the scene underground, can control to fill the soil body by this density, ensure the compatible deformation of optical fiber and the soil body.
Compared with prior art, detection fiber described in the utility model and the test unit of soil body compatible deformation can detect the different physical and mechanical parameter soil body and adopt the compatible deformation degree between different packaging technology optical fiber, for optical fiber under different geological conditions select and the determination that technique (digging up and filling in, well cementing) buried underground by optical fiber provides data supporting, make monitoring result more reliable, and device is simple and practical, visualization is high, can be widely used in adopting in the Geotechnical Engineering of fiber-optic monitoring.
Claims (6)
1. the test unit of a detection fiber and soil body compatible deformation, it is characterized in that, described test unit comprises model casing (1), chute (2) fixed by optical fiber, optical fiber (3), scaleplate (4), bearing plate (5), lifting jack (6), pressure cell (7) and pressure acquisition instrument (8); Described model casing (1) is made up of tetragonal body steel structure frame (101), structure glue (102) and the organic glass (103) that is positioned at six; Two ends, described model casing (1) front side are equipped with optical fiber and fix chute (2); Described optical fiber (3) level is in tension, and its two ends are fusiformis structure (301), and this fusiformis structure (301) embeds optical fiber and fixes in chute (2), can along fixing chute (2) vertically movement; Described scaleplate (4) is pasted on the organic glass (103) located above; Described bearing plate (5) is positioned at the organic glass (103) above model casing 1, it is provided with successively pressure cell (7) and lifting jack (6); Described lifting jack (6) Bonding pressure Acquisition Instrument (8).
2. the test unit of a kind of detection fiber according to claim 1 and soil body compatible deformation, is characterized in that, described scaleplate (4) is transparent material.
3. the test unit of a kind of detection fiber according to claim 1 and soil body compatible deformation, is characterized in that, described model casing (1) size length × wide × height is 60cm × 30cm × 30cm.
4. the test unit of a kind of detection fiber according to claim 1 and soil body compatible deformation, is characterized in that, described steel structure frame (101) adopts " L " type equal angle to be welded, the long 4cm of this leg of angle, the thick 2.8mm of limb.
5. the test unit of a kind of detection fiber according to claim 1 and soil body compatible deformation, is characterized in that, described structure glue (102) is epoxy resin adhesive.
6. the test unit of a kind of detection fiber according to claim 1 and soil body compatible deformation, is characterized in that, the tempered glass that described organic glass (103) is thickness 1cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520625252.3U CN205049415U (en) | 2015-08-18 | 2015-08-18 | Detect optic fibre and harmonious test device who warp of soil body |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520625252.3U CN205049415U (en) | 2015-08-18 | 2015-08-18 | Detect optic fibre and harmonious test device who warp of soil body |
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| CN205049415U true CN205049415U (en) | 2016-02-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865400A (en) * | 2016-03-31 | 2016-08-17 | 河海大学 | Smart test system for monitoring micro-deformation of soil body, testing method and evaluating method |
| CN106049399A (en) * | 2016-05-26 | 2016-10-26 | 南京大学 | Method for sensing foundation deformation and determining foundation destructional forms and bearing capacity by distributed optical fibers |
| CN111006605A (en) * | 2019-12-31 | 2020-04-14 | 山东科技大学 | Pre-buried type filling body transverse deformation measuring device based on fiber grating sensing |
| CN111006607A (en) * | 2019-12-31 | 2020-04-14 | 山东科技大学 | Filling body transverse deformation on-line monitoring system based on fiber bragg grating sensing |
| CN117346679A (en) * | 2023-11-21 | 2024-01-05 | 中国水利水电科学研究院 | Device and method for calibrating covariant condition of optical fiber and soil body |
-
2015
- 2015-08-18 CN CN201520625252.3U patent/CN205049415U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865400A (en) * | 2016-03-31 | 2016-08-17 | 河海大学 | Smart test system for monitoring micro-deformation of soil body, testing method and evaluating method |
| CN106049399A (en) * | 2016-05-26 | 2016-10-26 | 南京大学 | Method for sensing foundation deformation and determining foundation destructional forms and bearing capacity by distributed optical fibers |
| CN106049399B (en) * | 2016-05-26 | 2018-06-12 | 南京大学 | A kind of distributed fibre optic sensing foundation deformation, the method for determining ground failure mode and bearing capacity |
| CN111006605A (en) * | 2019-12-31 | 2020-04-14 | 山东科技大学 | Pre-buried type filling body transverse deformation measuring device based on fiber grating sensing |
| CN111006607A (en) * | 2019-12-31 | 2020-04-14 | 山东科技大学 | Filling body transverse deformation on-line monitoring system based on fiber bragg grating sensing |
| CN111006607B (en) * | 2019-12-31 | 2021-01-08 | 山东科技大学 | Filling body transverse deformation on-line monitoring system based on fiber bragg grating sensing |
| CN111006605B (en) * | 2019-12-31 | 2021-02-05 | 山东科技大学 | Pre-buried type filling body transverse deformation measuring device based on fiber grating sensing |
| CN117346679A (en) * | 2023-11-21 | 2024-01-05 | 中国水利水电科学研究院 | Device and method for calibrating covariant condition of optical fiber and soil body |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160224 Termination date: 20190818 |