CN209128856U - A kind of roadbed internal dynamic modulus of resilience real-time monitoring device - Google Patents
A kind of roadbed internal dynamic modulus of resilience real-time monitoring device Download PDFInfo
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- CN209128856U CN209128856U CN201821887463.4U CN201821887463U CN209128856U CN 209128856 U CN209128856 U CN 209128856U CN 201821887463 U CN201821887463 U CN 201821887463U CN 209128856 U CN209128856 U CN 209128856U
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- roadbed
- pressure sensor
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Abstract
The utility model discloses a kind of roadbed internal dynamic modulus of resilience real-time monitoring devices, it solves roadbed dynamic modulus test device in the prior art, and structure is complicated, the time-consuming and laborious problem of test process, with facilitating data to acquire, the beneficial effect that can be used for a long time is installed, its scheme is as follows: a kind of roadbed internal dynamic modulus of resilience real-time monitoring device, pressure sensor including the pipe fitting that can be inserted into roadbed and between road surface and roadbed, pressure sensor measures additional stress caused by vehicular load, the displacement sensor that subgrade deformation is corresponded to for measuring vehicular load is arranged in pipe fitting end, pressure sensor is connected with displacement sensor, dynamic resilience modulus value is obtained according to the numerical value of pressure sensor and displacement sensor.
Description
Technical field
The utility model relates to roadbed fields, fill more particularly to a kind of roadbed internal dynamic modulus of resilience real-time monitoring
It sets.
Background technique
Seed in 1962 etc. is introduced back during studying subgrade soils rebound characteristics and bituminous pavement fatigue damage relationship
Play the concept of modulus.To which subgrade soils dynamic resilience modulus (the abbreviation modulus of resilience) is used as flexible pavement mechanics-Experience Design
One of the major parameter of roadbed soil mechanics characteristic is characterized in method.
Mainly there are live loading plate method, Beckman using more subgrade resilient modulus detection method in road engineering at present
Liang Fa, FWD method, rayleigh wave method etc..In the above method, live loading plate method and Beckman amount method are static detection method, are surveyed
Subgrade resilient modulus is static modulus；FWD method, rayleigh wave method, surveyed subgrade resilient modulus are dynamic modulus.
Live loading plate method, to roadbed multistage loadings, unloading, measures the change of rebound corresponding to loads at different levels using loading plate
Shape value, and then acquire subgrade resilient modulus.This method is one of the standard method of subgrade resilient modulus measurement, in highway engineering
It is widely used.It is rationally to determine the test load upper limit using the difficult point of live loading plate method detection subgrade resilient modulus, makes it
It is consistent with road foundation actual loading and deformation characteristic, to avoid or reduce Pavement Design deviation.In addition, live loading plate
Method is cumbersome, low efficiency, it is difficult to meet the needs quickly detected in highway engineering；The surveyed modulus of resilience of this method is static mould
Amount, it is difficult to deformation characteristic of the reflection roadbed under vehicle dynamic load effect completely, it is especially express highway roadbed in vehicular load
Dynamic deformation under effect.
Backman beam method is the rebound deflection value using benkelman beams deflectometer measurement road surface under standard deviation effect, passes through formula inverse
Acquire subgrade resilient modulus.This method loading method is intuitive, and it is convenient that point position changes, and examines in the highway engineering subgrade modulus of resilience
It is also used widely in survey.Influence factor is more in the application of backman beam method, vehicle tyre load and the blowing pressure, speed, side
Head verticality, point position, branch point deformation, environmental factor, human factor and field management etc. can all bring its detection accuracy
It influences.As live loading plate method, the surveyed subgrade resilient modulus of backman beam method is static modulus, it is difficult to reflect that roadbed is expert at
Deformation characteristic under vehicle dynamic loading.
Dynamic deflection of the FWD method using drop hammer deflection meter measurement roadbed under impact load, passes through deflection value inverse
Subgrade resilient modulus.The load applied when FWD method on-site test is often significantly greater than what roadbed in Practical Project may be born
Traffic load causes roadbed to be plastically deformed, and influences modulus of resilience measurement result.In addition, FWD method on-site test cost compared with
Height, equipment conveying are time-consuming, laborious.
The elastic parameter theory relation of Rayleigh velocity of wave propagation and propagation medium is clear, and R wave passes in uniform dielectric
It is unrelated with frequency to broadcast speed, i.e., without frequency dispersion, this fundamental characteristics makes it can be used for Subgrade Construction Quality detection.
Problem Summary existing for above-mentioned various modulus of resilience detection methods is as follows: the deformation measurement under reaction dynamic load by vehicle
Complicated integral structure, measurement means are cumbersome；Modulus of resilience measurement result accuracy is not high；Therefore, it is necessary to in a kind of roadbed
Portion's dynamic resilience modulus real-time monitoring device carries out new researching and designing.
Utility model content
In order to overcome the deficiencies of the prior art, the utility model provides, and a kind of roadbed internal dynamic modulus of resilience is supervised in real time
Device is surveyed, convenient and efficient, dynamic resilience modulus in the long-term the real time measure roadbed of energy.
A kind of concrete scheme of roadbed internal dynamic modulus of resilience real-time monitoring device is as follows:
A kind of roadbed internal dynamic modulus of resilience real-time monitoring device including the pipe fitting that can be inserted into roadbed and is set to road
Pressure sensor between face and roadbed, pressure sensor measure additional stress caused by vehicular load, and pipe fitting end setting is used for
Measurement vehicular load corresponds to the displacement sensor of subgrade deformation, and pressure sensor is connected with displacement sensor, according to pressure sensing
The numerical value of device and displacement sensor obtains dynamic resilience modulus value.
Above-mentioned apparatus, once mounting can be used for a long time, and by the setting of pressure sensor and displacement sensor, be able to satisfy road
The demand of the long-term real-time monitoring of the base internal dynamic modulus of resilience, obtained data result can be used for analyzing road mechanical characteristic, be
Maintenance, maintenance and the assessment of condition of road surface of highway provide scientific basis, are with a wide range of applications.
Wherein, pressure sensor is directly arranged in the junction on roadbed and road surface；The upper surface of pressure sensor and the road
Base upper surface flushes.
Further, institute's displacement sensors realize the connection of two sensors by the aperture of pressure sensor side,
Pressure sensor is soil pressure sensor, and aperture is arranged in the end face of soil pressure sensor.
Further, the flexible part of probe set of institute's displacement sensors, probe elastic component end setting briquetting with
Elastic component is set to be in compressive state, the prominent briquetting setting of probe, the aperture of probe and pressure sensor connects, and pressure sensor is held
Pressure change is detected by dynamic load, is passed because displacement sensor is connect with pressure sensor, and by displacement sensor pressure
The change in displacement of sensor, to realize the corresponding subgrade deformation of vehicular load.
Further, institute's displacement sensors and the pipe fitting adhesion, can specifically be realized by binder such as glue can
By connection, displacement sensor is LVDT displacement sensor, and the probe of the displacement sensor is arranged upward vertically.
Further, the pressure sensor, displacement sensor pass through conducting wire respectively and connect with modem, and pressure
Sensor is connect with displacement sensor with the solar panel for being set to road surface or roadbed side, solar panel and modulatedemodulate
Device connection is adjusted, the power supply to pressure sensor, displacement sensor and modem is realized by solar panel.
Further, in order to guarantee the service life of conducting wire, the conducting wire is set in flexible hose, and flexible hose is ripple
Pipe.
A kind of installation method of roadbed internal dynamic modulus of resilience real-time monitoring device, includes the following steps:
The position for needing to measure dynamic resilience modulus in road is chosen, determines base course thickness at this, preparation length is greater than
Equal to the pipe fitting of base course thickness at this；
Pipe fitting is squeezed into roadbed；
Displacement sensor is installed in the end that pipe fitting is set in roadbed, in displacement sensor probe tips and pressure sensor
Connection；
And pressure sensor is set between road surface and roadbed；
Dynamic resilience modulus value is obtained according to the numerical value of pressure sensor and displacement sensor.
Wherein, the pipe fitting is threaded steel pipe, and pipe fitting is connected as one with roadbed；
It is described that pipe fitting is squeezed into roadbed method particularly includes: to be squeezed into pipe fitting in roadbed by drilling instrument.
Further, described that dynamic resilience modulus value M is obtained according to the numerical value of pressure sensor and displacement sensor
Specific formula for calculation it is as follows:
Wherein d is the diameter of pressure sensor, and μ is soil's Poisson ratio, and σ is that the vehicular load that pressure sensor measures causes
Additional stress value, l is the corresponding subgrade deformation value of vehicular load that measures of displacement sensor.
Compared with prior art, the utility model has the beneficial effects that
1) the utility model whole device is applied to on-the-spot test, by the setting of pressure sensor and displacement sensor,
Realize real-time measurement, solve the problems, such as can not the real-time measurement roadbed internal dynamic modulus of resilience, the utility model can it is accurate, have
The modulus of resilience inside the measurement roadbed of effect.
2) utility model device is easy, and install convenient can save a large amount of money and time cost, and once mounting can
It is used for a long time.
3) the utility model passes through the setting position of displacement sensor, and the setting position of pressure sensor can effectively improve
The accuracy of measurement data.
4) the utility model carries out data collection task by the way of wireless transmission, has unattended automatic collection number
According to the characteristics of, while can be with the collecting work of remote control data.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the structural schematic diagram of the utility model measuring device；
Fig. 2 is the utility model part-structure enlarged drawing；
Wherein: 1. road surfaces, 2. roadbeds, 3. lower roadbeds, 4. soil pressure sensors, 5. displacement sensors, 6. pipe fittings, 7. modulation
Demodulator, 8. solar panels, 9. briquettings, 10. springs.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, the deficiencies in the prior art, in order to solve technical problem as above, this Shen
It please propose a kind of roadbed internal dynamic modulus of resilience real-time monitoring device.
In a kind of typical embodiment of the application, as depicted in figs. 1 and 2, a kind of roadbed internal dynamic modulus of resilience
Real-time monitoring device, roadbed include roadbed 2 and lower roadbed 3, and monitoring device includes the pipe fitting that can be inserted into roadbed and is set to road
Pressure sensor between face 1 and roadbed 2, pressure sensor measure additional stress caused by vehicular load, and the setting of 6 end of pipe fitting is used
The displacement sensor of subgrade deformation is corresponded in measurement vehicular load, pressure sensor is connected with displacement sensor, passed according to pressure
The numerical value of sensor and displacement sensor obtains dynamic resilience modulus value.
Above-mentioned apparatus, pipe fitting can be installed before roadbed setting, perhaps be installed before pavement construction or on road
After the completion of surface construction, pipe fitting needs to be driven into roadbed by drilling machine, and once mounting can be used for a long time, by pressure sensor and
The setting of displacement sensor 5 is able to satisfy the demand of the long-term real-time monitoring of the roadbed internal dynamic modulus of resilience, obtained data result
It can be used for analyzing road mechanical characteristic, the assessment for the maintenance of highway, maintenance and condition of road surface provides scientific basis, has
Broad application prospect.
Pressure sensor can be connect with the probe of displacement sensor, pressure sensor use diameter for 30cm, with a thickness of 2cm
Soil pressure sensor 4, aperture is arranged in specific 4 side of soil pressure sensor, and aperture is blind hole.5 probe of displacement sensor is cased with
Spring, in the end of spring briquetting is arranged so that spring is in compressive state in probe, to realize the measurement of LVDT displacement sensor,
And the prominent briquetting 9 of probe is arranged, briquetting 9 has set distance, the end of the prominent briquetting 9 of probe and pressure apart from soil pressure sensor 4
The blind hole of force snesor end face connects, and specific probe passes through blind hole and can be connected through a screw thread with pressure sensor, or passes through glue
Water realizes connection.
Displacement sensor 5 and 6 adhesion of pipe fitting can be specifically reliably connected, displacement sensor 5 by binder such as glue realization
Probe be arranged upward vertically.
Pressure sensor, displacement sensor 5 are connect by conducting wire with modem 7 respectively, and pressure sensor and position
Displacement sensor is connect with the solar panel 8 for being set to road surface or roadbed side, and solar panel 8 and modem connect
It connects, the power supply to pressure sensor, displacement sensor 5 and modem 7, modulation /demodulation is realized by solar panel 8
Device 7 is GSM demodulator.
There are two types of data acquisition modes for above-mentioned monitoring device, first is that gsm module itself has storage function, it can be by data
It is stored in module, only needs that data can be obtained in such a way that USB is accessed when obtaining data；Second is that wireless data transmission side
Formula can control the acquisition of data by computer remote by the data wireless transmission function of GSM, and data are wirelessly transferred
Base station is acquired to data.
In order to guarantee the service life of conducting wire, conducting wire is set in flexible hose, and flexible hose is bellows, and corrugated flexible hose is vertical
To that must be flexible, it is displaced with the vertical displacement with LVDT displacement sensor probe.But in the other direction, corrugated flexible hose must
There must be enough rigidity, to resist the pressure from compacting soil.To ensure the displacement of LVDT displacement sensor not by moisture
Deng the influence of other environmental factors, corrugated flexible hose must have preferable waterproof performance.
A kind of installation method of roadbed internal dynamic modulus of resilience real-time monitoring device, includes the following steps:
1) position for needing to measure dynamic resilience modulus in road is chosen, determines base course thickness at this, preparation length is big
In the pipe fitting for being equal to base course thickness at this；
2) pipe fitting is squeezed into lower roadbed 3, pipe fitting is not moved with the movement of roadbed；
3) displacement sensor 5 is installed in the end that pipe fitting is set in roadbed 2, it is light in the setting of 5 probe tips of displacement sensor
Matter spring, and briquetting 9 is set in probe tips, so that spring is in confined state, the prominent briquetting setting of probe；
4) probe tips of displacement sensor are set in the aperture of soil pressure sensor 4, by 4 upper end of soil pressure sensor
Face flushes with 2 upper surface of roadbed and is configured；
5) soil pressure sensor 4 and displacement sensor 5 are connected to modem 7 by conducting wire respectively, according to soil pressure
The numerical value that sensor 4 and displacement sensor 5 measure obtains dynamic resilience modulus value.
Wherein, pipe fitting 6 is threaded steel pipe；
Pipe fitting 6 is squeezed into roadbed method particularly includes: squeeze into pipe fitting 6 in lower roadbed 3 by drilling instrument.
The specific calculating of dynamic resilience modulus value M is obtained according to the numerical value that soil pressure sensor 4 and displacement sensor 5 measure
Formula is as follows:
Wherein d is the diameter of soil pressure sensor 4, and μ is soil's Poisson ratio, and σ is the vehicular load that pressure sensor measures
Caused additional stress value, l are the corresponding subgrade deformation value of vehicular load that displacement sensor measures.
The utility model in-site installation is easy, it is possible to reduce the quantity of required installation personnel and set-up time, will not be because of this
The installation of device and cause road for a long time closing etc. situations.The utility model provides dynamic inside quick automatic measurement roadbed
The method of the state modulus of resilience by data automatic recording and can be stored, and can remotely be obtained by way of wireless transmission
Access evidence, reduces time and the cost of measurement.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (8)
1. a kind of roadbed internal dynamic modulus of resilience real-time monitoring device, which is characterized in that including the pipe that can be inserted into roadbed
Part and the pressure sensor between road surface and roadbed, pressure sensor measure additional stress caused by vehicular load, pipe fitting end
The displacement sensor that subgrade deformation is corresponded to for measuring vehicular load is arranged in portion, and pressure sensor is connected with displacement sensor, root
Dynamic resilience modulus value is obtained according to the numerical value of pressure sensor and displacement sensor.
2. a kind of roadbed internal dynamic modulus of resilience real-time monitoring device according to claim 1, which is characterized in that described
The upper surface of pressure sensor is flushed with the roadbed upper surface.
3. a kind of roadbed internal dynamic modulus of resilience real-time monitoring device according to claim 1, which is characterized in that described
Displacement sensor realizes the connection of two sensors by the aperture of pressure sensor side,
Pressure sensor is soil pressure sensor.
4. a kind of roadbed internal dynamic modulus of resilience real-time monitoring device according to claim 1, which is characterized in that described
In the end of elastic component briquetting is arranged so that elastic component is in compressive state in the flexible part of the probe set of displacement sensor, probe,
The prominent briquetting setting of probe.
5. a kind of roadbed internal dynamic modulus of resilience real-time monitoring device according to claim 1, which is characterized in that described
Displacement sensor and the pipe fitting adhesion；
Alternatively, the pressure sensor is soil pressure sensor.
6. a kind of roadbed internal dynamic modulus of resilience real-time monitoring device according to claim 1, which is characterized in that described
Pressure sensor, displacement sensor pass through conducting wire respectively and connect with modem, and pressure sensor and displacement sensor with
It is connected set on the solar panel of road surface or roadbed side, solar panel is connect with modem.
7. a kind of roadbed internal dynamic modulus of resilience real-time monitoring device according to claim 6, which is characterized in that described
Conducting wire is set in flexible hose.
8. a kind of roadbed internal dynamic modulus of resilience real-time monitoring device according to claim 1, which is characterized in that described
Pipe fitting is threaded steel pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821887463.4U CN209128856U (en) | 2018-11-15 | 2018-11-15 | A kind of roadbed internal dynamic modulus of resilience real-time monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821887463.4U CN209128856U (en) | 2018-11-15 | 2018-11-15 | A kind of roadbed internal dynamic modulus of resilience real-time monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023009889A1 (en) * | 2021-07-30 | 2023-02-02 | Tensar International Corporation | System and method for detecting subgrade deformation |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023009889A1 (en) * | 2021-07-30 | 2023-02-02 | Tensar International Corporation | System and method for detecting subgrade deformation |
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