CN104032723B - The soil body grows long-term method of real-time and device - Google Patents
The soil body grows long-term method of real-time and device Download PDFInfo
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- CN104032723B CN104032723B CN201410298105.XA CN201410298105A CN104032723B CN 104032723 B CN104032723 B CN 104032723B CN 201410298105 A CN201410298105 A CN 201410298105A CN 104032723 B CN104032723 B CN 104032723B
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- soil body
- intelligent aggregate
- concrete pile
- piezoelectric intelligent
- voltage signal
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- Geophysics And Detection Of Objects (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides a kind of soil body and grow long-term method of real-time and device, the method is: be positioned respectively by two groups of piezoelectric intelligent aggregate arrays, on two concrete pile reinforcing cages, the soil body to be imbedded in stake; One group of piezoelectric intelligent aggregate array is applied to the signal of telecommunication field wave of change, and gather the voltage signal ripple of another group piezoelectric intelligent aggregate array output, obtain soil body developmental condition according to voltage signal ripple.Present invention achieves the soil body and grow long-term Real-Time Monitoring, the soil body developmental condition data of acquisition can be the differentiation of stake soil coupling performance provides analysis foundation.
Description
Technical field
The invention belongs to civil engineering monitoring and evaluation technical field, particularly relate to a kind of soil body and grow long-term method of real-time and device.
Background technology
In civil engineering monitoring field, need the supporting capacity assessing stake, and the supporting capacity of stake largely depends on the developmental condition of pile foundation surrounding soil, therefore needs monitoring soil body developmental condition.At present, soil body developmental condition generally obtains by detecting soil body sample, cannot Real-time Obtaining soil body developmental condition.The present invention utilizes piezoelectric intelligent aggregate to carry out real-time long term monitoring to soil body developmental condition, at present also without any relevant report.
Summary of the invention
The object of this invention is to provide a kind of soil body based on piezoelectric intelligent aggregate and grow long-term method of real-time and system, the present invention forms actuating station and induction end respectively by two groups of piezoelectric intelligent aggregates, and obtains soil body developmental condition by the behavior pattern of induction end excitation induced ripple between the soil body.
For achieving the above object, the invention provides a kind of soil body and growing long-term method of real-time: two groups of piezoelectric intelligent aggregate arrays are positioned respectively, on two concrete pile reinforcing cages, concrete pile is imbedded the soil body; One group of piezoelectric intelligent aggregate array is applied to the signal of telecommunication field wave of change, and gather the voltage signal ripple of another group piezoelectric intelligent aggregate array output, obtain soil body developmental condition according to voltage signal ripple.
Above-mentioned piezoelectric intelligent aggregate comprises piezoelectric patches and is coated on the concrete cover outside piezoelectric patches.As preferably, piezoelectric patches is coated with waterproofing course.
Above-mentioned according to voltage signal ripple acquisition soil body developmental condition, comprise sub-step further:
(1) voltage signal ripple Sample Storehouse is set up:
In the different developmental condition soil body, adopt said method to monitor, obtain the voltage signal ripple that the different developmental condition soil body is corresponding, and set up voltage signal ripple Sample Storehouse;
(2) voltage signal ripple in the voltage signal ripple of the soil body to be monitored and voltage signal ripple Sample Storehouse is compared, obtain the developmental condition of the soil body to be monitored.
Present invention also offers a kind of soil body and grow long-term real-time monitoring device, comprising:
Perform concrete pile and induction concrete pile, perform on concrete pile reinforcing cage and be positioned with the first piezoelectric intelligent aggregate array, induction concrete pile reinforcing cage is positioned with the second piezoelectric intelligent aggregate array, first piezoelectric intelligent aggregate array connection signal generating unit, the second piezoelectric intelligent aggregate array connection data collecting unit; Described signal generating unit be used for first piezoelectric intelligent aggregate array apply change signal of telecommunication field wave.
Above-mentioned first piezoelectric intelligent aggregate array is equidistantly positioned to perform on concrete pile reinforcing cage along performing concrete pile length direction; The second described piezoelectric intelligent aggregate array is equidistantly positioned on induction concrete pile reinforcing cage along induction concrete pile length direction.
Above-mentioned piezoelectric intelligent aggregate comprises piezoelectric patches and is coated on the concrete cover outside piezoelectric patches.As preferably, piezoelectric patches is coated with waterproofing course.
The present invention has reoffered a kind of soil body and has grown long-term real-time monitoring system, comprising:
The soil body grows real-time monitoring device, modal processor, higher level's data processing unit and central processing unit, the soil body is grown real-time monitoring device image data and is transmitted by first communication module and be stored in modal processor, storage data are transferred to higher level's data processing unit by second communication module by modal processor, and the data of reception are transferred to central processing unit by third communication module by higher level's data processing unit.
Above-mentioned first communication module, second communication module and third communication module are wireless communication module.
The present invention adopts active sensing monitoring mode: both actuating station piezoelectric intelligent aggregate is launched field wave as actuator and transmitted in the soil body, and induction end piezoelectric intelligent aggregate is as the response of inductor excitation induced ripple in different place.Soil body developmental condition change in various degree correspondingly can affect the transmission performance of field wave.Field wave transmits performance and soil body developmental condition has certain corresponding relation.
The propagation of field wave in the soil body is considered as with one dimension longitudinal waves, and wave equation is
wherein, the displacement of u representation unit,
e is young's modulus of elasticity, and ρ is density of material.The harmonic response energy of field wave
Thus acquisition harmonic amplitude
Wherein ω is humorous angular frequency.According to formula
known harmonic amplitude A is relevant with the Young module E of dielectric material (i.e. the soil body).Young's modulus of elasticity is relevant with soil body growth course again, and young's modulus of elasticity is the leading indicator of evaluation soil strength, and along with soil body developmental condition changes, soil strength changes, and young's modulus of elasticity also can change, and harmonic amplitude is corresponding to change.Harmonic amplitude A is also defined as freeze-thaw index, can be monitored the change of soil strength by the change observing freeze-thaw index, thus obtains the change of soil body developmental condition.See Fig. 2 ~ 3, Fig. 2 is the soil body sample temperature curve over time of test, Fig. 3 is the relation curve of soil body sample temperature and freeze thawing index, Fig. 3 reflects native stress wave in body and develops, crest shows soil strength maximum value, trough represents soil strength minimum value, and wave form varies indicates soil body growth course.
Compared to the prior art, the present invention has the following advantages and beneficial effect:
Adopt piezoelectric intelligent aggregate to achieve the soil body and grow Real-Time Monitoring, the soil body developmental condition data of acquisition can be the differentiation of stake soil coupling performance provides analysis foundation.
Accompanying drawing explanation
Fig. 1 is that the soil body of the present invention grows real-time monitoring device schematic diagram;
Fig. 2 is soil body sample temperature curve over time;
Fig. 3 is the relation curve of soil body sample temperature and freeze thawing index;
Fig. 4 is the network topology structure schematic diagram that the soil body of the present invention grows real-time monitoring system.
Detailed description of the invention
The present invention is based on piezoelectric intelligent aggregate to realize, the core of piezoelectric intelligent aggregate is piezoelectric patches, piezoelectric patches has piezoelectric property, meeting output voltage signal when namely occurring to strain, generation strain signal can be exported during applied field change, because this characteristic makes piezoelectric patches namely can be used as inductor, can be used as actuator again.Piezoelectric intelligent aggregate is made up of the concrete cover outside piezoelectric patches and piezoelectric patches, and as preferably, piezoelectric patches is through waterproofing work, and namely piezoelectric patches is coated with epoxy resin waterproofing course.
The present invention utilizes the piezoelectric property of piezoelectric intelligent aggregate, see Fig. 1, two groups of piezoelectric intelligent aggregate arrays are positioned respectively on two concrete pile reinforcing cages, to burying in people's soil body after concrete pile concrete perfusion, separated by a distance between two concrete piles, this distance is wanted to ensure that the soil body between two concrete piles can represent the development condition in soil body region to be monitored, can ensure again the normal transmission of fluctuation signal.
One group in two groups of piezoelectric intelligent aggregate arrays, as actuating station, is positioned to perform in concrete pile; Another group, as induction end, is positioned in induction concrete pile; Actuating station is used for transmitting, induction end be used for receive actuating station send signal.Piezoelectric intelligent aggregate array is a series of piezoelectric intelligent aggregates being positioned concrete pile reinforcing cage along concrete pile length direction by predetermined interval.The piezoelectric intelligent aggregate array of actuating station is drawn by wire and is connected with signal generating unit, and the piezoelectric intelligent aggregate array of induction end is drawn by wire and is connected with data acquisition unit.In this concrete enforcement, signal generating unit adopts NI company PXI signal generator, and data acquisition unit adopts American National Instrument Instrument company USB-6009 data collecting card.
Signal generating unit sends the signal of telecommunication field wave of change to actuating station, the piezoelectric intelligent aggregate generation deformation of actuating station, thus produce stress field wave, and be transferred to induction stake by the soil body, the induction end piezoelectric intelligent aggregate receiving stress field wave produces voltage signal, by data acquisition unit acquires.During stress field wave transmits in the soil body, if soil body developmental condition is stablized, then stress field wave rule change, presents stability characteristic (quality) in voltage signal certain period of data acquisition unit collection; If the soil body is due to factors vary genesis and development differentiation such as weathers, the corresponding acute variation that presents of stress field wave, also can there is acute variation in the voltage signal of data acquisition unit acquires, the acute variation of voltage signal can reflect the evolution process of the soil body in the corresponding period.
Adopt execution stake and induction stake combination can monitor the zones of different of the soil body, this adopts optimizing data network topology structure to realize the real-time transmission of high-frequency data in specifically implementing.See Fig. 4, in optimizing data network topology, one group of soil body developmental condition data performing stake and induction stake combination monitoring is stored in the modal processor being placed in terminal, modal processor by wireless communication module by the data upload that stores to the data processing unit of higher level.The data processing unit of higher level by the data upload that receives to central processing unit.
The course of work of the present invention and principle is further illustrated below in conjunction with detailed description of the invention:
1, piezoelectric patches skin is wrapped up epoxy resin layer, concrete cover successively, epoxy resin layer is used for waterproof, thus obtains piezoelectric intelligent aggregate, and the piezoelectric patches adopted in this detailed description of the invention is PZT piezoelectric patches.
2, one group of piezoelectric intelligent aggregate is equidistantly buried people and perform concrete pile, and be positioned to perform concrete pile reinforcing cage; Another group piezoelectric intelligent aggregate then equidistantly buries people and responds to concrete pile, is positioned induction concrete pile reinforcing cage; By the holding wire that is connected with piezoelectric intelligent aggregate from concrete pile Base top contact.
3, imbed in the soil body to be monitored by execution concrete pile and induction concrete pile, perform concrete pile and be used for firing stress field wave, induction concrete pile is used for receiving the stress field wave performing concrete pile and launch.The characteristic of stress field wave is produced by signal generating unit, the change that different signal of telecommunication field waves transmits through the soil body to analyze stress field wave can occur setting signal generating unit.
Perform the stress field wave of concrete pile generation after soil body transmission, because the soil body is in the difference of each phasic development state, in transmitting procedure, stress field wave will inevitably produce different variation characteristics, stress field wave after soil body transmission can cause induction concrete pile to produce voltage signal ripple, and received by data acquisition unit, the change of the voltage signal ripple that the change of stress field wave will inevitably cause concrete pile to produce in transmitting procedure.
The Common Parameters characterizing soil body developmental condition comprises porosity, moisture content, freeze thawing index modulus of shearing etc.In the different developmental condition soil body, adopt apparatus of the present invention to monitor, obtain the voltage signal ripple that the soil body of different developmental condition is corresponding, and set up voltage signal ripple Sample Storehouse.Voltage signal ripple in the voltage signal ripple of each data acquisition unit acquires and voltage signal ripple Sample Storehouse is compared, obtains soil body developmental condition.
5, data acquisition unit is sent by the soil body developmental condition data of wireless transport module by each group of execution stake and induction stake combination monitoring and is stored to modal processor, and modal processor will store the data processing unit of data upload to higher level by wireless transport module.The data processing unit of higher level will receive data upload to long-range central processing unit.Can be obtained the developmental condition in each region to be monitored of the soil body by central processing unit, these developmental condition data and corresponding wave spectrum can provide analysis foundation for the differentiation of stake soil coupling performance.
Claims (4)
1. the soil body grows long-term method of real-time, it is characterized in that:
Two groups of piezoelectric intelligent aggregate arrays are positioned respectively perform on concrete pile and induction concrete pile reinforcing cage, execution concrete pile and induction concrete pile are imbedded the soil body; Being positioned the one group of piezoelectric intelligent aggregate array performed on concrete pile reinforcing cage is the first piezoelectric intelligent aggregate array, and connection signal generating unit, and signal generating unit is used for applying the first piezoelectric intelligent aggregate array the signal of telecommunication field wave of change; Being positioned the one group of piezoelectric intelligent aggregate array responded on concrete pile reinforcing cage is the second piezoelectric intelligent aggregate array, and connection data collecting unit, data acquisition unit is used for the voltage signal ripple that collection second piezoelectric intelligent aggregate array exports, and obtains soil body developmental condition according to voltage signal ripple;
Described obtains soil body developmental condition according to voltage signal ripple, comprises sub-step further:
(1) voltage signal ripple Sample Storehouse is set up:
In the different developmental condition soil body, adopt said method to obtain voltage signal ripple corresponding to the different developmental condition soil body, and set up voltage signal ripple Sample Storehouse;
(2) voltage signal ripple in voltage signal ripple corresponding for the soil body to be monitored and voltage signal ripple Sample Storehouse is compared, obtain the developmental condition of the soil body to be monitored.
2. the soil body as claimed in claim 1 grows long-term method of real-time, it is characterized in that:
Described piezoelectric intelligent aggregate comprises piezoelectric patches and is coated on the concrete cover outside piezoelectric patches.
3. the soil body grows long-term real-time monitoring system, it is characterized in that, comprising:
The soil body grows real-time monitoring device, modal processor, higher level's data processing unit and central processing unit, the data that the soil body grows real-time monitoring device collection are undertaken transmitting and being stored in modal processor by first communication module, the data of storage are transferred to higher level's data processing unit by second communication module by modal processor, and the data of reception are transferred to central processing unit by third communication module by higher level's data processing unit;
The described soil body is grown real-time monitoring device and is comprised execution concrete pile and induction concrete pile, perform on concrete pile reinforcing cage and be positioned with the first piezoelectric intelligent aggregate array, induction concrete pile reinforcing cage is positioned with the second piezoelectric intelligent aggregate array, first piezoelectric intelligent aggregate array connection signal generating unit, the second piezoelectric intelligent aggregate array connection data collecting unit; Described signal generating unit be used for first piezoelectric intelligent aggregate array apply change signal of telecommunication field wave.
4. the soil body as claimed in claim 3 grows long-term real-time monitoring system, it is characterized in that:
Described first communication module, described second communication module and described third communication module are wireless communication module.
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| CN106353203B (en) * | 2016-10-13 | 2019-05-10 | 武汉大学 | A kind of visualization of soil capability real-time monitoring is from perceiving detector |
| CN111595374B (en) * | 2020-05-06 | 2021-10-19 | 三峡大学 | Telegraph pole buried depth and damage detection method based on Rayleigh waves |
| CN111579355B (en) * | 2020-06-18 | 2023-04-28 | 湖北震泰建设工程质量检测有限责任公司 | Method for monitoring unbalanced load of static load test of bored concrete pile |
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| CA2013773A1 (en) * | 1990-04-03 | 1991-10-03 | Mikhail Pildysh | Earth anchoring device |
| CN101059408A (en) * | 2007-05-15 | 2007-10-24 | 吉林省交通科学研究所 | Bridge super long large diameter pile foundation bearing capacity test method |
| CN101216443B (en) * | 2008-01-02 | 2010-09-15 | 沈阳建筑大学 | Piezoelectric intelligent aggregate for civil engineering works structure health monitoring |
| CN102279350A (en) * | 2011-03-31 | 2011-12-14 | 广东电网公司广州供电局 | Ultrasonic wave partial discharge detection analyzer |
| CN102507655A (en) * | 2011-10-24 | 2012-06-20 | 沈阳建筑大学 | Method for monitoring compaction of concrete-filled steel tube structure based on piezoelectric intelligent aggregate |
| CN102937646B (en) * | 2012-11-08 | 2015-11-25 | 沈阳建筑大学 | A kind of health monitoring systems for xoncrete structure |
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