CN204439025U - A kind of novel side slope centrifugal model test proving installation - Google Patents
A kind of novel side slope centrifugal model test proving installation Download PDFInfo
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- CN204439025U CN204439025U CN201520072325.0U CN201520072325U CN204439025U CN 204439025 U CN204439025 U CN 204439025U CN 201520072325 U CN201520072325 U CN 201520072325U CN 204439025 U CN204439025 U CN 204439025U
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Abstract
The utility model discloses a kind of novel side slope centrifugal model test proving installation, comprise hydro-extractor, pivoted arm two ends in hydro-extractor are provided with hanging basket, hanging basket internal fixtion has model casing, the Rock And Soil of horizon d and overlayer formation domatic is provided with in model casing, be close to model casing sidewall at the bottom of the slope of Rock And Soil and be provided with friction pile, friction pile and Rock And Soil surface of contact are provided with fiber-optic grating sensor, the slope of Rock And Soil holds out against another sidewall pasting model casing and is adjacent to be provided with four displacement measurement elements, the test anchor pole being provided with fiber-optic grating sensor is had along overlayer oblique cutting, pivoted arm in hydro-extractor is also fixed with fiber Bragg grating (FBG) demodulator and PC, grating demodulation instrument and PC are connected respectively to the power supply of hydro-extractor, friction pile, the fiber-optic grating sensor tested on anchor pole and displacement measurement element accesses fiber optic high-resolution grating demodulation instrument by series connection is rear successively, fiber Bragg grating (FBG) demodulator access PC or memory device.The utility model has easy to operate, that cost is low, safe and reliable feature.
Description
Technical field
The utility model relates to a kind of novel side slope centrifugal model test proving installation, realize, for the fiber grating integration test of slope displacement, friction pile and rockbolt stress test, being particularly useful for that model component size in centrifugal field is little, the situation of work under bad environment in geotechnological centrifugal field.
Background technology
At present, for the electricity component that many employings when slope displacement and earth structure test are traditional in centrifugal field, as adopted the domatic change in displacement of differential displacement measurement examination, and adopt the mechanical response of the works such as foil gauge test friction pile.Adopt during traditional electrical testing element and face problems, wherein differential displacement meter only can test the displacement on side slope surface, cannot test slope body internal displacement, and there is the problem of compatible deformation difficulty between test point and Rock And Soil; And when carrying out forces testing for friction pile and anchor pole, because centrifugal mold shaped piece size is less, adopt conventional foil gauge to test it, face layout not easily, the phenomenon such as bonding difficulty.In addition, when side slope model operates in centrifugal field, due to the impact of moisture and model casing random vibration in the body of slope, also often there is the phenomenon lost efficacy that comes off wholly or in part in foil gauge, cause measuring point test figure regular poor, be difficult to the true and reliable property of warranty test achievement.
Summary of the invention
The purpose of this utility model will solve the deficiencies in the prior art and provide a kind of to have higher sensitivity and degree of accuracy novel side slope centrifugal model test proving installation.
For achieving the above object, the utility model is implemented according to following technical scheme:
A kind of novel side slope centrifugal model test proving installation, comprise hydro-extractor, pivoted arm two ends in hydro-extractor are provided with hanging basket, hanging basket internal fixtion has model casing, the Rock And Soil of horizon d and overlayer formation domatic is provided with in model casing, be close to model casing sidewall at the bottom of the slope of described Rock And Soil and be provided with friction pile, friction pile and Rock And Soil surface of contact are provided with fiber-optic grating sensor, the slope of Rock And Soil holds out against another sidewall pasting model casing and is adjacent to be provided with four displacement measurement elements, the test anchor pole being provided with fiber-optic grating sensor is had along overlayer oblique cutting, institute's displacement measurement element comprises fixed block, the beam of uniform strength, steel wire and cross displacement measuring points, the slope that one end face of fixed block is fixed on Rock And Soil holds out against another sidewall pasting model casing, symmetrical other end is fixedly connected with one end of the beam of uniform strength, the beam of uniform strength is provided with fiber-optic grating sensor, the other end of the beam of uniform strength connects one end of steel wire, the other end of steel wire connects cross displacement measuring points, described four cross displacement measuring points distribution is in the overlayer of Rock And Soil, pivoted arm in described hydro-extractor is also fixed with fiber Bragg grating (FBG) demodulator and PC, grating demodulation instrument and PC are connected respectively to the power supply of hydro-extractor, fiber-optic grating sensor on described friction pile, test anchor pole and displacement measurement element accesses fiber optic high-resolution grating demodulation instrument after being connected successively by fibre circuit, and fiber Bragg grating (FBG) demodulator is by USB port access PC or memory device.
As further preferred version of the present utility model, described test anchor pole is set to two.
As further preferred version of the present utility model, described gauge of wire is 0.3mm.
As further preferred version of the present utility model, the silica sand that the surface mount 1mm of described test anchor pole is thick.
Compared with prior art, the utility model can solve the problem of slope-mass slide displacement and supporting construction load-bearing monitor difficulty in centrifugal model test, and structure is simple.In addition, the utility model, by carrying out simple technological transformation to existing centrifuge test system, can realize the test optical fiber in centrifugal field, has easy to operate, that cost is low, safe and reliable feature.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is connection diagram of the present utility model;
Fig. 3 is the structural representation of the utility model displacement measurement element;
Fig. 4 is the utility model fiber grating data acquisition system (DAS) display information in real time figure.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described, is used for explaining the utility model in the illustrative examples of this utility model and explanation, but not as to restriction of the present utility model.
As Fig. 1, Fig. 2, one shown in Fig. 3 novel side slope centrifugal model test proving installation, comprise hydro-extractor 1, pivoted arm 2 two ends in hydro-extractor 1 are provided with hanging basket 3, hanging basket 3 internal fixtion has model casing 4, the Rock And Soil that horizon d 8 and overlayer 9 form domatic is provided with in model casing 4, be close to model casing sidewall at the bottom of the slope of Rock And Soil and be provided with friction pile 10, friction pile 10 and Rock And Soil surface of contact are provided with fiber-optic grating sensor 17, the slope of Rock And Soil holds out against another sidewall pasting model casing and is adjacent to be provided with four displacement measurement elements 14, the test anchor pole 11 being provided with fiber-optic grating sensor 17 is had along overlayer 9 oblique cutting, displacement measurement element 14 comprises fixed block 15, the beam of uniform strength 16, steel wire 18 and cross displacement measuring points 19, the slope that one end face of fixed block 15 is fixed on Rock And Soil holds out against another sidewall pasting model casing, symmetrical other end is fixedly connected with one end of the beam of uniform strength 16, the beam of uniform strength 16 is provided with fiber-optic grating sensor 17, the other end of the beam of uniform strength 16 connects one end of steel wire 18, the other end of steel wire 18 connects cross displacement measuring points 19, four cross displacement measuring points 19 distributions are in the overlayer 9 of Rock And Soil, pivoted arm 2 in hydro-extractor 1 is also fixed with fiber Bragg grating (FBG) demodulator 5 and PC 6, grating demodulation instrument 5 and PC 6 are connected respectively to the power supply 7 of hydro-extractor, fiber-optic grating sensor 17 on friction pile 10, test anchor pole 11 and displacement measurement element 14 accesses fiber optic high-resolution grating demodulation instrument 5 after being connected successively by fibre circuit, and fiber Bragg grating (FBG) demodulator 5 is by USB port access PC or memory device 6.
For friction pile 10 and test anchor pole 11 is stressed test time, first carry out surface finish process to ensure its flatness, then adopt Qick type special gelatin mixture that fiber-optic grating sensor 17 is fixed on preposition, can use after static 12h, when testing slope-mass slide displacement, for ensureing that the compatible deformation between measuring point and Rock And Soil adopts cross to hook frame as cross displacement measuring points 19, and be connected to the beam of uniform strength 16 by 0.3mm finer wire, finally the beam of uniform strength 16 is fixed on model casing 4 one sidewall by fixed block 15; Slope-mass slide displacement measures the mode adopting cross displacement measuring points 19 to drive the beam of uniform strength 16 to deform, and is obtained by the relation indirect between the strain of the beam of uniform strength 16 and the wavelength variations of fiber-optic grating sensor 17.For friction pile 10 and primary structure member such as test anchor pole 11 grade, when side slope works in centrifugal field, unstability trend can be produced under the imposed loads such as rainfall, thus make the friction pile 10 of body front end, slope and test anchor pole 11 bear corresponding load and produce compatible deformation, and then cause the wavelength of fiber-optic grating sensor 17 to change, fiber Bragg grating (FBG) demodulator 5 can be scaled strain and stress according to wavelength variation data, fiber grating nominal data and works rigidity, and shown in real time by PC or memory device 6, as shown in Figure 4.
What in this test, fiber Bragg grating (FBG) demodulator 5 adopted is the TX type fiber optic high-resolution grating demodulation instrument produced by UC company of the U.S., this system dimension is little, precision is high, by built-in tuning source and photodetector, form a high precision optical fiber grating sensor demodulation analysis instrument, and be applicable to dissimilar Fibre Optical Sensor, system not only can the side-play amount that changes with external condition of display centre wavelength, can also clearly illustrate the process that the spectral shape of fiber-optic grating sensor changes with external condition.Related channel program can the information of multiple sensors in transmission or reflection simultaneously on demodulation simple optical fiber.Test data can by RS232 port or USB communication interface High Speed Transfer extremely external PC or memory device 6.For ensureing the stability of test data, this test adopts and forms demodulation, storage system by the extraordinary notebook computer of Itronix ix270 type with the solid state hard disc with Self-Protection Subsystem.
Because fiber Bragg grating (FBG) demodulator 5 and data memory need independently power supply 7, therefore need in test circuit modification that hydro-extractor is correlated with, coordinate the 220V on hydro-extractor pivoted arm to reserve power supply in this test, by 9 core aviation plug external-connected ports, above-mentioned two systems are powered respectively.
For reducing too much transformation and the loss of signal of light in transmitting procedure in process of the test, in this test, by scheme comparison employing fiber Bragg grating (FBG) demodulator 5 and data-carrier store 6 be fixed on the scheme on hydro-extractor 1 pivoted arm 2.For reducing centrifugal force for the instrument vibrations in the disturbing effect of test macro and process of the test as far as possible, need fiber Bragg grating (FBG) demodulator 5 and data-carrier store 6 be placed near hydro-extractor 1 main shaft as far as possible, fixture is adopted to be fixed on centrifugal basket optical fiber transmission line, in the groove of 2, test proves that the method effectively can avoid the random swing of circuit in hydro-extractor rotation process.
The technical solution of the utility model is not limited to the restriction of above-mentioned specific embodiment, and every technology distortion made according to the technical solution of the utility model, all falls within protection domain of the present utility model.
Claims (4)
1. a novel side slope centrifugal model test proving installation, comprise hydro-extractor (1), pivoted arm (2) two ends in hydro-extractor (1) are provided with hanging basket (3), hanging basket (3) internal fixtion has model casing (4), the Rock And Soil of horizon d (8) and overlayer (9) formation domatic is provided with in model casing (4), it is characterized in that: be close to model casing sidewall at the bottom of the slope of described Rock And Soil and be provided with friction pile (10), friction pile (10) and Rock And Soil surface of contact are provided with fiber-optic grating sensor (17), the slope of Rock And Soil holds out against another sidewall pasting model casing and is adjacent to be provided with four displacement measurement elements (14), the test anchor pole (11) being provided with fiber-optic grating sensor (17) is had along overlayer (9) oblique cutting, institute's displacement measurement element (14) comprises fixed block (15), the beam of uniform strength (16), steel wire (18) and cross displacement measuring points (19), the slope that one end face of fixed block (15) is fixed on Rock And Soil holds out against another sidewall pasting model casing, symmetrical other end is fixedly connected with one end of the beam of uniform strength (16), the beam of uniform strength (16) is provided with fiber-optic grating sensor (17), the other end of the beam of uniform strength (16) connects one end of steel wire (18), the other end of steel wire (18) connects cross displacement measuring points (19), described four cross displacement measuring points (19) distribution is in the overlayer (9) of Rock And Soil, pivoted arm (2) in described hydro-extractor (1) is also fixed with fiber Bragg grating (FBG) demodulator (5) and PC (6), grating demodulation instrument (5) and PC (6) are connected respectively to the power supply (7) of hydro-extractor, fiber-optic grating sensor (17) on described friction pile (10), test anchor pole (11) and displacement measurement element (14) accesses fiber optic high-resolution grating demodulation instrument (5) after being connected successively by fibre circuit, and fiber Bragg grating (FBG) demodulator (5) is by USB port access PC or memory device (6).
2. novel side slope centrifugal model test proving installation according to claim 1, is characterized in that: described test anchor pole (11) is set to two.
3. novel side slope centrifugal model test proving installation according to claim 1, is characterized in that: the diameter of described steel wire (18) is 0.3mm.
4. novel side slope centrifugal model test proving installation according to claim 1, is characterized in that: the silica sand that the surface mount 1mm of described test anchor pole (11) is thick.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520072325.0U CN204439025U (en) | 2015-02-02 | 2015-02-02 | A kind of novel side slope centrifugal model test proving installation |
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| CN201520072325.0U CN204439025U (en) | 2015-02-02 | 2015-02-02 | A kind of novel side slope centrifugal model test proving installation |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115440A (en) * | 2015-08-19 | 2015-12-02 | 华中科技大学 | Partial displacement measurement method based on fiber grating sensor |
| CN105136041A (en) * | 2015-08-19 | 2015-12-09 | 华中科技大学 | Local displacement measuring device based on FBG sensor |
| CN106013273A (en) * | 2016-07-06 | 2016-10-12 | 大连理工大学 | Working condition simulation method of pressure type anchor model in centrifugal field |
| CN106338249A (en) * | 2016-10-09 | 2017-01-18 | 中国电建集团华东勘测设计研究院有限公司 | Centrifuge vibration displacement field integrated test acquisition system and displacement measurement method |
| CN107356381A (en) * | 2017-05-16 | 2017-11-17 | 华北水利水电大学 | A kind of Geotechnical Engineering supporting construction model test apparatus and its test method |
| CN108398543A (en) * | 2018-04-12 | 2018-08-14 | 含山县进步阶梯环境科技有限公司 | Centrifugation landslide case of the high pressure gas to the influence that comes down is probed into model sample |
| CN109826244A (en) * | 2018-12-21 | 2019-05-31 | 成都理工大学 | A kind of double-row pile reinforces embankment side slope centrifugal model and its test method |
| CN109826245A (en) * | 2018-12-21 | 2019-05-31 | 成都理工大学 | A kind of reinforced earth tall earth fill centrifugal model test method |
| CN110487449A (en) * | 2019-07-03 | 2019-11-22 | 南方科技大学 | A kind of real-time landslide monitoring system and method |
-
2015
- 2015-02-02 CN CN201520072325.0U patent/CN204439025U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115440A (en) * | 2015-08-19 | 2015-12-02 | 华中科技大学 | Partial displacement measurement method based on fiber grating sensor |
| CN105136041A (en) * | 2015-08-19 | 2015-12-09 | 华中科技大学 | Local displacement measuring device based on FBG sensor |
| CN105115440B (en) * | 2015-08-19 | 2017-09-12 | 华中科技大学 | A kind of local displacement measuring method based on fiber-optic grating sensor |
| CN105136041B (en) * | 2015-08-19 | 2017-09-29 | 华中科技大学 | A kind of local displacement measurement apparatus based on FBG sensor |
| CN106013273A (en) * | 2016-07-06 | 2016-10-12 | 大连理工大学 | Working condition simulation method of pressure type anchor model in centrifugal field |
| CN106338249A (en) * | 2016-10-09 | 2017-01-18 | 中国电建集团华东勘测设计研究院有限公司 | Centrifuge vibration displacement field integrated test acquisition system and displacement measurement method |
| CN107356381A (en) * | 2017-05-16 | 2017-11-17 | 华北水利水电大学 | A kind of Geotechnical Engineering supporting construction model test apparatus and its test method |
| CN108398543A (en) * | 2018-04-12 | 2018-08-14 | 含山县进步阶梯环境科技有限公司 | Centrifugation landslide case of the high pressure gas to the influence that comes down is probed into model sample |
| CN108398543B (en) * | 2018-04-12 | 2021-08-13 | 陈欢伦 | Centrifugal landslide box for researching influence of high-pressure gas on landslide in model sample |
| CN109826244A (en) * | 2018-12-21 | 2019-05-31 | 成都理工大学 | A kind of double-row pile reinforces embankment side slope centrifugal model and its test method |
| CN109826245A (en) * | 2018-12-21 | 2019-05-31 | 成都理工大学 | A kind of reinforced earth tall earth fill centrifugal model test method |
| CN110487449A (en) * | 2019-07-03 | 2019-11-22 | 南方科技大学 | A kind of real-time landslide monitoring system and method |
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| 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: 20150701 Termination date: 20170202 |