CN108717082A - A kind of compaction of earth rock material quality continuous assessment method based on integrated sonic detection technology - Google Patents

A kind of compaction of earth rock material quality continuous assessment method based on integrated sonic detection technology Download PDF

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CN108717082A
CN108717082A CN201810721874.4A CN201810721874A CN108717082A CN 108717082 A CN108717082 A CN 108717082A CN 201810721874 A CN201810721874 A CN 201810721874A CN 108717082 A CN108717082 A CN 108717082A
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compaction
quality
earth
roller
construction
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CN108717082B (en
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刘天云
张庆龙
安再展
李庆斌
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Tsinghua University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/44Processing the detected response signal, e.g. electronic circuits specially adapted therefor

Abstract

A kind of compaction of earth rock material quality continuous assessment method based on integrated sonic detection technology, includes the steps that being:Scene is obtained using conventional point sampling detection method measurement to test pits experimental tests result;It establishes and chooses suitable compaction of earth rock material Evaluation Model on Quality;Calculate the compaction quality at each grid in current roller compaction construction work surface;In conjunction with spatial interpolation methods, the compaction quality of current roller compaction construction full face any position is obtained;Further, according to compaction quality control criterion, analysis placement grinding construction area is up-to-standard or unqualified region, calculates the qualification rate of the compaction quality in current roller compaction construction region;It timely feedbacks and instructs site operation, and enforcing remedies measure, to control construction quality.The present invention simple, efficient, continuous, accurate, comprehensively can assess earth and rock works and fill the filled soils with earth and stone material, its filled soils is controlled in order to timely feedback under the premise of not destroying earth and rock works filling body.

Description

A kind of compaction of earth rock material quality continuous assessment method based on integrated sonic detection technology
Technical field
The invention belongs to earth rock placement Construction Quality Control Technique fields, can be used for earth rock placement quality and continuously comment Estimate, more particularly to a kind of compaction of earth rock material quality continuous assessment method based on integrated sonic detection technology.
Background technology
Compaction quality assessment during filling is to close for the quality control on construction of earth and rock works such as earth-rock works One of key link has decisive influence to the safety and stability of infrastructure.Filling material such as soil, aggregate or pitch The compaction quality of mixture conventionally by the sampling Detection of the density of the certain discrete points in scene, water content, intensity or modulus into Row assessment.Sand replacement method, carbide, snead process, Nucleus Density Apparatus method and douche be currently used for detection fill material it is close The common detection methods of degree.For water content, common detection methods include mainly Nucleus Density Apparatus method, sand replacement method and directly heat Method.And Dynamic Cone Penetrometer method and Ke Laige impacts soil testing method are conventional to fill material strength detecting method.Just fill Expect for modulus, light weight benkelman beams deflectometer method, soil stiffness meter method and planar loading method are common common detection methods.However it is conventional Method have the shortcomings that it is apparent, such as point sampling detection, damage detection, detection efficiency is low, testing cost is high, for operating personnel require It is high.Therefore, compaction quality conventional control methods can not effectively reflect the compaction state of entire placement grinding operating area, It cannot be satisfied earth and rock works Quick mechanicalization construction demand.
With RICM (roller-integrated compaction monitoring), IC (intelligent Compaction) technology, GPR (ground-penetrating radar) method, Rayleigh wave method and other detection detection sides The appearance of method, common detection methods there are the problem of obtain part solve.RICM technologies are commonly used in earth and rock works compacting Quality control (QC)/quality assurance (QA), and be currently primarily used in construction of the highway.With the relevant RICM indexs of compaction state Value (RICMV) is calculated from the vibration data that the sensor in vibrating wheels obtains, and RICMV can be used to characterize and fill out Build the real-time compaction state of material such as fine grained soil, coarse-grained soil and asphalt mixture.Several RICMVs can be used to characterize fill out at present The compaction quality of material is built, including the CMV (compaction meter value) of Geodynamic companies use, Ammann companies The k of usesMDP (the machine used with ACE systems (Ammann compaction expert), Caterpillar companies Drive power) and Bomag companies use OMEGA and BVC (Bomag variocontrol) system.In addition, White etc. It proposes and uses FvibModulus is vibrated in compacting as supercrust, and Rinehart etc. points out THD (total harmonic Distortion) it is a kind of hypersensitivity index for assessing soil compaction state.By to filling construction parameter (number of rolling, Running speed, vibrational state and compacted thickness) real time monitoring, Liu et al. is using RICM technologies monitoring assessment earth and rockfill dam and coagulation The compaction quality of native rock.In conjunction with AFC (automatic feedback control) technologies and RICM, several researchs Person proposed to assess earth rock placement construction quality using IC technologies, has been widely used in Europe, Japan and the U.S. Highway engineering in.In addition, Karray etc. utilizes the sides MASW (multichannel analysis of surface waves) Method assesses the deep compaction situation of P é ribonka dam foundations, the results showed that it is unique that Surface Wave Method has in terms of rock detection Application potential.Chiang etc. utilizes the compactness of Stress Wave Method detect and assess backfill.Shangguan etc. utilizes GPR Technology monitors the compaction state of bituminous paving.Austin etc. utilizes NIMRS (near-infrared and microwave Resonance sensing) technology monitoring bituminous paving compaction quality.Tan etc. is using FBGS (fiber bragg Grating sensing) the technical research compaction quality control problem of bituminous paving.
At home, correlative study is concentrated mainly on the compaction quality real-time monitoring device development aspect of road foundation feeding. Zhang Runli, the vibrating compacting degree detector for occupying color plum exploitation, the vehicle loaded densification degree detector and Liu Zedong of Yang Jian exploitations The roadbed compactedness detecting instrument etc. of equal exploitations.Above-mentioned apparatus basic principle is all the movenent performance for monitoring roller vibrating wheels (such as speed, amplitude, frequency), the relationship between movenent performance and compactness by analyzing vibrating wheels, is established based on vibration The compactness characteristic index of motility analysis is taken turns, and then to estimate the compactness of roadbed earth material.The it is proposeds such as Deng Xuexin pass through detection Vibrating wheels vibration acceleration reflects the automatic testing principle of the compactness of soil compression situation indirectly, and develops response detection system System.Miao Linchang and Qiu Yu researchs and analyses ground soil nature using spectrum analysis (SASW) technology of surface wave and surface wave.Lee Small brave and Xu Jinkai proposes the detection method with New Type of Rubber Balloon with Water Volumometer compacted density of roadbed.Model cloud and Wang Ying Zhenkai Fill thickness detection and airborne compacting integrated system application study are opened up.Liu Liping and Wang Dongyao have carried out soil-stone material Controls for Compaction Quality is studied.Xu Guanghui etc. is proposed using follow-on test road structure drag change information as the power of characteristic Monitoring method is learned, Continuous Dynamic Monitor Technology on Subgrade Compaction Quality is developed.Li Shaobo etc. is proposed to be evaluated using shear wave velocity The new method of soil-stone embankment porosity is proposed using porosity as the control standard of compaction quality index.In order to realize rigidity The Fast nondestructive evaluation that road slab comes to nothing with Subgrade Compaction Quality, Liu Huixun etc. propose the dynamic using transient test method as characteristic Detection technique.Good, Sun Zuwang of military Artline, hippology etc. has studied the compacting of the oscillatory roller based on energy balance and automatically controls skill Art.Li Bin etc. has developed Middle Line Project For Transferring Water From South To North first stage of the project highly filled road roller compaction construction Real-time quality monitoring system, and It is applied in engineering practice.Wu Bin equalitys develop dragon opening RCC dam and pour roller compaction construction Real-time quality monitoring system It unites and is applied in the engineering.Liu Donghai etc. has developed rock-fill dams compaction quality real-time monitoring system, and to enrockment Dam compaction quality has carried out real-time monitoring and rapid evaluation.In addition, Zhong Denghua etc. develops earth and rockfill dam rolls quality monitoring in real time System and RCC dam realtime construction Quality Monitoring Control System, are calculated using number of rolling, based on acceleration harmonic signal The compactness index value characterization compaction quality arrived, and by multivariate regression models predicts entire dam facing or roller compaction construction region Compactness situation.
Although the above newest achievement in research both at home and abroad shows that above-mentioned new technology, new method were extensive in recent years Applied in Practical Project, these technology and methods are in terms of earth rock placement quality evaluation especially in the compacting matter of stockpile Still have several disadvantages in terms of amount assessment, as accuracy is low, be not convenient to use, the explanation of compaction state is more complicated, significantly from Dissipate property, in result there are it is larger it is wrong, be easy to be influenced by filling material factor.In addition, although compacting parameter such as rolls time Number, running speed, compacting layer thickness for earth rock placement quality control especially stockpile compaction quality control into It has gone and has partly studied, but compacting parameter is not the direct token state of compaction quality, heterogeneity (such as water content and grade of material With) also result in the unsatisfactory control effect of compacting parameter.In conclusion the compaction quality of earth rock placement material It is not only influenced by work progress parameter, but also is influenced by filling material property (such as grading, water content), thus Only by the compactness characteristic index based on vibrating wheels Analysis of mobility, without considering roller compaction process parameter, and native stone The influence of square filling material property, the compaction quality to assess filling material are unilateral.To solve the above-mentioned problems, Zhang Qinglong Accurately had etc. the compaction quality that integrated sonic detection technology rolls quality especially stockpile to earth rock placement is proposed The detection of effect, and the continuous assessment that quality is rolled for earth rock placement still needs to further study.
Invention content
In order to overcome the disadvantages of the above prior art, the purpose of the present invention is to provide one kind based on integrated sonic detection skill The compaction of earth rock material quality continuous assessment method of art, the appraisal procedure are based on roller compaction construction parameter, based on integrated sonic detection skill The compaction quality real-time characterization index of art simultaneously considers earth rock placement material character, can be used for earth and rock works filled soils Real-time effective assessment, especially during earth and rockfill dam dam embankment stockpile compaction quality assessment, as earth and rock works A kind of effective tool of the real-time continuous assessment of filled soils during filling construction, the present invention are filled not destroying earth and rock works Under the premise of body, it simple, efficient, continuous, accurate, comprehensively can assess earth and rock works and fill filling out for material especially earth and stone material Quality is built, its filled soils is controlled in order to timely feedback.Compacting the present invention is based on integrated sonic detection technology to earth and stone material Quality carries out efficient, lossless, full face continuous assessment, the airborne sound wave of compaction quality based on integrated sonic detection technological development Detecting system is acquired the acoustical signal sent out in earth and stone material in roller vibrating compaction process and utilizes airborne computer pair The signal carries out spectrum analysis, then obtains continuous acoustic pressure reality index value (SCV, the sound of characterization compaction of earth rock material quality Compaction value), Statistical regression analysis method is then based on to SCV and roller compaction construction parameter, common detection methods Measure obtained compaction of earth rock material quality and carry out correlation analysis, so establishes and select suitable compaction of earth rock material degree with continuously The relational model of Compaction (SCV) realizes the compacting to full face during filling construction in conjunction with spatial interpolation methods Quality is assessed, in terms of thus can effectively solving existing earth and rock works filled soils assessment technology and method, especially Be in terms of earth and rockfill dam filled soils assessments existing for accuracy it is low, it is inefficient, be not convenient to use, the explanation of compaction state it is more multiple In miscellaneous, apparent discreteness, result there are it is larger it is wrong, be easy to be influenced by filling material factor, do not consider that roller compaction process is joined The problems such as influence of number and earth rock placement material character carries out unilateral assessment to the compaction quality of filling material, realize to It assesses, continuous, full face real-time in the compaction of earth rock material quality that earth and rock works fill.
To achieve the goals above, the technical solution adopted by the present invention is:
A kind of compaction of earth rock material quality continuous assessment method based on integrated sonic detection technology is examined using conventional point sampling The scene that survey method measures test pits experimental tests as a result, include water content w, grading p and compaction quality, compaction quality be compactness K or Dry density ρ, and tested pits the roller compaction construction parameter at a position using the correspondence of acquisition, roller compaction construction parameter is running speed v, pressure Real thickness h, vibration frequency f, number of rolling n, and utilize the consolidation effect integrated at the testing pits of sonic detection technology acquisition Index S CV establishes the one of compaction of earth rock material quality and roller compaction construction parameter, consolidation effect index i.e. earth and stone material water content, grading Member or multiple linear, nonlinear regression model (NLRM), according to several regression model accuracies analysis and to model apply high efficacious prescriptions Just demand chooses suitable regression model as compaction quality assessment models;On this basis, it is currently applied using real-time acquisition The consolidation effect index S CV of the roller compaction construction parameter (v, h, f, n) of work work surface and the current operation side acquired in real time, with And the earth and stone material water content and grading measured using conventional point sampling detection method, it calculates on current operation side at each grid Compaction quality;Then, spatial interpolation methods are recycled, the compaction quality of current operation side any position is obtained;Into One step, according to compaction quality control criterion, up-to-standard or unqualified region is analyzed, the compacting of current operation side is calculated The qualification rate of quality, and it is shown as to the space-time compacting of roller compaction construction operation full face over the display with spatial positional information Quality distribution diagram;Accordingly, site operation is timely feedbacked, to control construction quality.
The routine point sampling detection method can pass through for douche, sand replacement method, core cutter method, Nucleus Density Apparatus method, circular cone Enter instrument method, benkelman beams deflectometer method, soil stiffness meter method or planar loading method etc..
The step is further refined as:
(1) it utilizes the cubic metre of earth and stone to be compacted monitoring system, acquires roller compaction construction parameter, including running speed v, compacted thickness in real time H, vibration frequency f and number of rolling n, and the roller real-time spatial position information that is obtained by RTK-GPS technologies;
(2) using the airborne acoustic wave sensing system of compaction quality being mounted on roller, compaction of earth rock material effect is acquired in real time Fruit index S CV and its corresponding spatial positional information;
(3) it measures scene using conventional point sampling detection method to test pits a little and the result information of laboratory test, including tests pits a little Coordinate, water content w, grading p and compaction quality, compaction quality index be compactness K or dry density ρ;
(4) information for utilizing step (1) and (2) acquisition determines the roller compaction construction parameter at a place of each testing pits and is compacted effect Fruit index and test pits earth and stone material title, water content, grading and the compaction quality a little, build each earth and stone material and test pits a little Sample data;
(5) compaction of earth rock material quality and roller compaction construction parameter, the correlation of consolidation effect index are analyzed, matter is compacted to determine Measure the variable of regression model;
(6) unitary or multiple linear, non-linear soil building stones compaction quality regression model are established, according to several regression models The analysis of accuracy and to model apply efficiently convenient demand, choose suitable regression model as compaction quality assessment mould Type;
(7) it determines current operation side, starts roller compaction construction operation process real time monitoring.
(8) remote monitoring using the cubic metre of earth and stone compacting monitoring system being mounted on roller and foundation at rational position Platform acquires the roller compaction construction parameter (v, h, f, n) of current operation side and its corresponding real-time spatial position information in real time;
(9) using the airborne acoustic wave sensing system of compaction quality being mounted on roller, current construction operation is acquired in real time Consolidation effect index S CV during the roller compaction construction of face and its corresponding spatial positional information;
(10) current construction surface is subjected to gridding processing, is supervised using the far field that is stored in that step (8) and step (9) acquire The information in platform database is controlled, determines roller compaction construction parameter and consolidation effect index at each grid on operation side;
(11) using as step (3) acquire the title of earth and stone material on current operation side, earth and stone material material, determination works as The material of earth and stone material on preceding operation side at each grid determines currently by the aqueous of the earth and stone material of roller compaction construction operation Measure w and grading p;
(12) at each grid that the regression model and step (10) and step (11) established according to step (6) determine Roller compaction construction parameter, consolidation effect index value and earth and stone material material, can assess on current operation side at each grid Compaction quality, compaction quality index includes compactness K or dry density ρ;
(13) compaction quality spatial interpolation methods are used, compaction quality space interpolation is carried out, obtains current operation side The compaction quality value of any position exports compaction quality cloud atlas;
(14) compaction quality of any position obtained according to step (13), and controlled and marked according to the compaction quality of setting Standard analyzes up-to-standard or unqualified region, and calculates the qualification rate of full face compaction quality;It is applied for feedback guidance scene Work, to adopt remedial measures in time to unqualified region.
Step (6) is specially:The model variable determined according to step (5) and each sample data tested pits a little, respectively Establish compaction quality and roller compaction construction parameter, the unitary of consolidation effect index S CV and earth rock placement material character or polynary line Property, nonlinear regression model (NLRM), i.e. compaction of earth rock material Evaluation Model on Quality:Z=F (n, v, h, f, SCV, p, w), roller compaction construction parameter Including:Running speed, compacted thickness, vibration frequency, number of rolling, filling material property include water content v, grading p, and Z is soil The compaction quality of building stones, compaction quality are compactness K or dry density ρ;F () is regression function, can pass through regression analysis It determines.
It is compared with method with existing earth and rock works filled soils assessment technology, the present invention proposes a kind of suitable for native stone Square engineering fill material especially the wider stockpile of earth-rock works particle diameter distribution, be based on roller compaction construction parameter and consolidation effect Compaction of earth rock material quality continuous assessment method that is monitoring in real time and considering material character realizes the reality of compaction of earth rock material quality When, it is continuous, fully assess.The present invention can overcome the one-sidedness using finite point sampling Detection operation side compaction quality, can Realize the assessment of construction full work surface any position compaction quality;The rapidly and efficiently assessment of compaction of earth rock material quality can be achieved, Delay effect that common detection methods bring site operation and laboratory test results is avoided to be difficult to timely feedback guiding construction Disadvantage;New solution can be provided for earth and rock works filling construction quality control, to ensure engineering construction quality Or even engineering safety provides a strong guarantee.
Description of the drawings
Fig. 1 show a kind of compaction of earth rock material quality continuous assessment flow chart based on integrated sonic detection technology.
Specific implementation mode
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention Protection domain.
The present invention provides a kind of compaction of earth rock material quality continuous assessment method based on integrated sonic detection technology, using normal Rule point sampling detection method (such as douche) measure field tests pits experimental tests as a result, including water content w, grading p and compaction quality (compactness K or dry density ρ), and be compacted monitoring system using using the cubic metre of earth and stone being mounted on roller and establish in reasonable position The correspondence of the remote monitoring platform acquisition at the place of the setting roller compaction construction parameter at a position of testing pits (running speed v, compacted thickness h, is shaken Dynamic frequency f, number of rolling n), and testing pits using the airborne acoustic wave sensing system acquisition of the compaction quality being mounted on roller Consolidation effect index S CV at point establishes the compaction quality and roller compaction construction parameter, consolidation effect index and earth and stone material of earth and stone material Water content, the unitary of grading or multiple linear, nonlinear regression model (NLRM), according to analysis to several regression model accuracies and right Model applies efficiently convenient demand, chooses suitable regression model as compaction quality assessment models;On this basis, it utilizes Cubic metre of earth and stone compacting monitoring system acquires the roller compaction construction parameter (v, h, f, n) and earth and stone material pressure of current roller compaction construction work surface in real time The consolidation effect index S CV for the current roller compaction construction work surface that the airborne acoustic wave sensing system of real mass acquires in real time, and utilize Conventional point sampling detection method (such as douche) measures obtained earth and stone material water content and grading, calculates current filling construction operation Compaction quality on face at each grid;Then, in conjunction with spatial interpolation methods, current roller compaction construction full face can be obtained The compaction quality of any position;It is possible to further according to compaction quality control criterion, analyze up-to-standard or unqualified area Domain, and calculate the qualification rate of the compaction quality of current filling construction full face;Accordingly, guidance scene can be timely feedbacked to apply Work, to control construction quality.This method is as follows:
(1) it utilizes the cubic metre of earth and stone to be compacted monitoring system, acquires roller compaction construction parameter, including running speed v, compacted thickness in real time H, vibration frequency f and number of rolling n and its corresponding spatial positional information, and above-mentioned data are transmitted by wireless transmitting system To remote monitoring platform real-time display and it is stored in the database server of remote monitoring platform simultaneously.
(2) using the airborne acoustic wave sensing system of compaction of earth rock material quality being mounted on roller, earth and stone material is acquired in real time Consolidation effect index S CV and its corresponding spatial positional information, and above-mentioned data are transmitted to long-range prison by wireless transmitting system Control platform real-time display is simultaneously stored in the database server of remote monitoring platform simultaneously.
(3) result for sampling test pits a scene and laboratory test is measured using conventional point sampling detection method (such as douche) Information, including point coordinates of testing pits, earth and stone material title, water content w, grading p and compaction quality (compactness K or dry density ρ), and These data are sent to remote data server using wireless transmitting system.
(4) information for utilizing step (1) and step (2) acquisition determines roller compaction construction parameter and pressure at each test pits Real effectiveness indicator and test pits earth and stone material title, water content, grading and the compaction quality a little, structure is each test pits at Sample data.
(5) compaction of earth rock material quality and roller compaction construction parameter, the correlation of consolidation effect index are analyzed, matter is compacted to determine Measure the variable of regression model.
(6) compaction of earth rock material quality regression model (assessment models) is established:According to step (5) determine model variable, with And each sampling test pits at sample data, establish compaction of earth rock material quality (compactness K or dry density ρ) and roller compaction construction respectively Parameter (the material of running speed v, compacted thickness h, vibration frequency f, number of rolling n), consolidation effect index S CV and earth and stone material (water content w, the unitary of grading p) or multiple linear, nonlinear regression model (NLRM) divide matter according to several regression model accuracies It analyses and efficiently convenient demand is applied to model, choose suitable regression model as compaction quality assessment models and establish native stone Expect compaction quality assessment models.
(7) it determines current roller compaction construction work surface, starts roller compaction process monitoring.
(8) it is compacted monitoring system using the cubic metre of earth and stone being mounted on roller, acquires current roller compaction construction work surface in real time Roller compaction construction parameter (v, h, f, n) and its corresponding spatial positional information, and be sent to remote monitoring platform and store simultaneously In the database server of remote monitoring platform.
(9) using the airborne acoustic wave sensing system of compaction quality being mounted on roller, current roller compaction construction is acquired in real time Consolidation effect index S CV in work surface roller compaction process and its corresponding spatial positional information, and it is sent to remote monitoring platform And it is stored in the database server of remote monitoring platform simultaneously.
(10) current operation side gridding is handled, is supervised using the far field that is stored in that step (8) and step (9) acquire The information in the database server of platform is controlled, determines that the roller compaction construction parameter and compacting on operation side at each grid are imitated Fruit index.
(11) material character of earth and stone material title, earth and stone material such as the current roller compaction construction work surface of step (3) acquisition is utilized (including water content w, grading p) determine the earth and stone material in current roller compaction construction work surface at each grid material character (including Water content w, grading p).
(12) stone roller at each grid that the model and step (10) and step (11) established according to step (6) determine The material character of pressure construction parameter, consolidation effect index value and earth and stone material, can assess each net in current roller compaction construction work surface Compaction quality (compactness K or dry density ρ) at lattice.
(13) compaction quality spatial interpolation methods are used, compaction quality space interpolation is carried out, current roller compaction construction can be obtained The compaction quality of any position in work surface exports compaction quality cloud atlas, and result is sent to remote monitoring platform and same When be stored in the database server of remote monitoring platform.
(14) compaction quality of any position obtained according to step (13), and control mark is seen according to the compacting matter of setting Standard analyzes up-to-standard or unqualified region, and calculates the qualification rate of full face compaction quality.Therefore, it can be used for feeding back and refer to On-site rolling construction operation is led, convenient for finding the unqualified region of compaction quality in time and adopting remedial measures in time.
With reference to the flow chart of the present invention to the compaction of earth rock material quality continuous assessment based on integrated sonic detection technology The implementation of method is described in detail.This method is as follows:
(1) roller compaction construction parameter (v, h, f, n) is acquired in real time
By the cubic metre of earth and stone compaction quality monitoring system on roller, by intervals (such as 2s), in real time Running speed v, compacted thickness h, vibration frequency f and number of rolling n etc. in acquisition earth rock placement material compacting process, which are rolled, to be applied Work parameter and its corresponding spatial positional information, and result is sent to remote monitoring platform and is stored in remote monitoring simultaneously and is put down In the database server of platform.
(2) compaction of earth rock material effectiveness indicator SCV is acquired in real time
Using the airborne acoustic wave sensing system of compaction of earth rock material quality on roller, (such as by intervals 2s), the consolidation effect index S CV in acquisition earth and stone material roller compaction process and its corresponding spatial positional information in real time, and by result It is sent to remote monitoring platform and is stored in the database server of remote monitoring platform simultaneously.Here, consolidation effect index SCV is defined as:
SCV=kA2
Wherein, k is the calibration coefficient of compacting material, A2Indicate filtered sound field time-domain signal, spectrum analysis and logarithm The second harmonic component of effective sound wave spectrum after processing.Acoustic signals are by the sound mounted on Front Frame lower position Field pickup device measures in real time.SCV is the indirect characteristic index that can reflect compaction of earth rock material quality (compactness K or dry density ρ);And SCV is bigger, and the compaction quality of earth and stone material is better.
(3) live point sampling detection method Test Information acquisition
In roller compaction construction work surface, test pits a scene and room are acquired using conventional point sampling detection method (such as douche) Interior test result information, including earth and stone material title, water content w and grading p and compaction quality (compactness K or dry density ρ), and Result is sent to remote monitoring platform and is stored in the database server of remote monitoring platform simultaneously, and combines RTK- GPS technology obtains space of points location information of testing pits.
(4) the roller compaction construction parameter at testing pits and consolidation effect index are determined
The roller compaction construction parameter that is acquired in real time using step (1) and step (2), consolidation effect index S CV and its corresponding Spatial positional information, and according to each coordinate tested pits a little, it may be determined that it is each test pits at roller compaction construction parameter (v, h, f, N) and earth and stone material water content w, the grading p and compaction quality at consolidation effect index S CV and a place of testing pits (compactness K is done Density p), it thus constitutes the earth and stone material at different location and tests pits a sample data.
(5) compaction of earth rock material quality and the correlation between roller compaction construction parameter, consolidation effect index are analyzed
According to collected enough sample datas of testing pits, analyze different earth and stone materials compaction quality (compactness K or Dry density ρ) with roller compaction construction parameter, the correlation of consolidation effect index.According to correlation strong or weak relation, determine that compaction quality returns Return the variable of model.
(6) compaction of earth rock material quality regression model (compaction quality assessment models) is established
The variable and each earth and stone material of the regression model determined according to correlation analysis test pits at sample data, Different sampled point compaction of earth rock material quality (compactness K or dry density ρ) and roller compaction construction parameter (v, h, f, n), pressure are established respectively Actual effect fruit index S CV and earth and stone material material character (water content w, grading p) regression model, i.e. compaction of earth rock material quality Assessment models.The model of foundation is as follows:
Z1=F (SCV) (1)
Z2=F (v, h, f, n, SCV, w, p) (2)
Z3=F (v2,h2,f2,n2,SCV,w2,p2) (3)
Wherein, formula (1)~(3) indicate unitary, multiple linear or nonlinear compaction Evaluation Model on Quality, Z1, Z2, Z3 respectively Indicate that the compaction quality (compactness K or dry density ρ) of earth and stone material, F () they are regression function, it can be true by regression analysis It is fixed.In addition, the model need to just can be used by significance test, otherwise needs to use more sample datas, can pass through to establish The regression model (compaction quality assessment models) of significance test.
By taking the dam shell material (sand gravel material) of certain reservoir engineering clay core wall earth and rockfill dam as an example, compaction quality can use dry density ρ reflects;And in view of by design requirement, compacted thickness h, running speed v, vibration frequency f be not substantially in practical roller compaction process It changes, and passes through water content w and obtain irrelevant conclusion with compaction quality correlation analysis, therefore can be in regression model not Consider variable, in the engineering, general number of rolling utilizes conventional sampling point methods (such as douche) when reaching design requirement 8 times Material compaction quality (dry density ρ) is filled to scene to be detected.The compacting matter of dam shell material sees that assessment models can in the engineering as a result, It is written as:
Wherein, F0() is the regression function of dam shell material (sand gravel material) compaction quality (dry density ρ), can be divided by returning Analysis method determines that the model need to pass through significance test.It is consolidation effect index S CV respectively, fills material grade Normalized value with p, According to several times Return the analysis of model exactness and efficiently convenient demand is applied to model, chooses suitable regression model and commented as compaction quality Estimate model.
(7) it determines current roller compaction construction work surface, starts roller compaction construction process monitoring
According to earth and rock works construction speed, the peace of next operation side and the roller compaction construction work surface is determined The roller of monitoring system and the airborne acoustic wave sensing system of compaction of earth rock material quality is compacted equipped with the cubic metre of earth and stone;Then, start to roll Construction starts simultaneously at roller compaction process monitoring.
(8) the roller compaction construction parameter of current roller compaction construction work surface is acquired in real time
It is compacted monitoring system using the cubic metre of earth and stone on roller, acquisition is ground in real time by intervals (such as 2s) The spatial positional information of press and the roller compaction construction parameter (v, h, f, n) in roller compaction process, and result is sent to long-range prison Control platform is simultaneously stored in the database server of remote monitoring platform simultaneously.
(9) the consolidation effect index of current roller compaction construction work surface is acquired in real time
Using the airborne acoustic wave sensing system of compaction of earth rock material quality on roller, according to intervals (such as 2s) acquires consolidation effect index S CV and its corresponding spatial positional information in roller compaction process, and result is sent in real time To remote monitoring platform and it is stored in the database server of remote monitoring platform simultaneously.
(10) roller compaction construction parameter and consolidation effect index at each grid in roller compaction construction work surface are determined
(such as 2s) that the sampling interval in step (8) and step (9) grows is taken to be used as sampling precision, to determine the time interval Current roller compaction construction work surface gridding is handled (small grid for being such as divided into 1m × 1m), utilized by lower roller running distance The on-site rolling data of step (8) and step (9) acquisition, spatially location information, gives each grid assignment, with each net of determination The roller compaction construction parameter (v, h, f, n) and consolidation effect index S CV of lattice.
Wherein, compacted thickness h, number of rolling n, consolidation effect index S CV be at the grid roller by design requirement Last is all over the value acquired when rolling;Running speed v takes roller repeatedly by the average value of the grid;If being wrapped in some grid When containing multiple sampled values, then take the average value of multiple collection values as the assignment of the grid.
(11) determine that current roller compaction construction work surface fills the material character of material
Live point sampling detection experiment (such as douche) after according to rolling, acquires current roller compaction construction work surface and fills out The material character for building material (includes water content w, grading p).Usual roller compaction construction work surface point sampling detection method can take multiple examinations Hole point, thus current roller compaction construction work surface fill material water content w, grading p takes the mean values of multiple experimental tests results of testing pits, and It is assumed that water content w, grading p all sames in roller compaction construction work surface at arbitrary mess.
(12) compaction quality assessment at each grid in current roller compaction construction work surface
Each net that the compaction quality assessment models and step (10) and step (11) established according to step (6) determine Roller compaction construction parameter, consolidation effect index S CV values at lattice, even if the compacting in current roller compaction construction work surface at each grid Quality (compactness K or dry density ρ).
(13) compaction quality space interpolation
In view of grid is discrete (such as each grid is 1m × 1m sizes) in entire roller compaction construction work surface, in order to Realize the assignment of compaction quality any position on full face, it is necessary to carry out compacting matter and see space interpolation, select here empty Interpolation method (such as Kriging interpolation methods) carries out compaction quality space interpolation.And then current roller compaction construction work surface can be obtained The compaction quality value of upper any position recycles the compaction quality cloud atlas of ArcGIS softwares and GS+ softwares output full face, And result is sent to remote monitoring platform and is stored in the database server of remote monitoring platform simultaneously.
(14) analysis of full face compaction quality and construction feedback control
According to the compaction quality for any position that step (13) obtains, (applied in conjunction with the compaction quality control standard of setting Work field engineering quality control requirement), such as dry density ρ >=ρ of sand gravel materiald, wherein ρdFor compaction quality criterion of acceptability value, into And compaction quality acceptance or rejection region can be analyzed, and utilize unqualified region at cloud atlas form mark;And full face is pressed The qualification rate r substantially seen then can be according to the following formula:
Wherein, r is the qualification rate of roller compaction construction full face compaction quality, SDFor roller compaction construction area in compaction quality cloud atlas Domain compaction quality characteristic index SCV or compaction quality (compactness K or dry density ρ) are more than the region area of acceptance value, and S is entire The area in roller compaction construction region, r is bigger, illustrates the better of compaction quality control of rolling operation face during filling construction. In turn, according to the above results, feedback guidance site operation in time adopts remedial measures to unqualified region.

Claims (4)

1. a kind of compaction of earth rock material quality continuous assessment method based on integrated sonic detection technology, which is characterized in that using often Rule point sampling detection method collection site tests pits experimental tests as a result, including water content w, grading p and compaction quality, and utilize acquisition Correspondence test pits at roller compaction construction parameter, consolidation effect index S CV and corresponding spatial positional information, establish earth and stone material Compaction quality and roller compaction construction parameter, with consolidation effect index and with earth and stone material water content w, the unitary of grading p or polynary line Property, nonlinear regression model (NLRM), wherein compaction quality be compactness K or dry density ρ, roller compaction construction parameter include running speed v, pressure Real thickness h, vibration frequency f and number of rolling n, according to several regression model accuracies analysis and to model apply high efficacious prescriptions Just demand chooses suitable regression model as compaction quality assessment models;On this basis, current using what is acquired in real time The roller compaction construction parameter and consolidation effect index S CV of roller compaction construction work surface, and acquired using conventional point sampling detection method Current roller compaction construction work surface test pits the earth and stone material water content w and grading p that experimental tests obtains, calculate current roller compaction construction operation Compaction quality on face at each grid;Then, it in conjunction with spatial interpolation methods, obtains arbitrary in current roller compaction construction work surface Compaction quality at position;And according to compaction quality control criterion, up-to-standard or unqualified region is analyzed, calculating currently rolls The qualification rate of the compaction quality of operation side;Accordingly, it timely feedbacks and instructs site operation, to control roller compaction construction quality.
2. the compaction of earth rock material quality continuous assessment method based on integrated sonic detection technology according to claim 1, special Sign is that the routine point sampling detection method is douche, sand replacement method, core cutter method, Nucleus Density Apparatus method, cone penetrometer Method, benkelman beams deflectometer method, soil stiffness meter method or planar loading method.
3. the compaction of earth rock material quality continuous assessment method based on integrated sonic detection technology according to claim 1, special Sign is, is as follows:
(1) cubic metre of earth and stone compaction quality monitoring system is utilized, acquires roller compaction construction parameter and corresponding spatial positional information in real time;
(2) using the airborne acoustic wave sensing system of compaction quality being mounted on roller, compaction of earth rock material effect is acquired in real time and is referred to Mark SCV and corresponding spatial positional information;
(3) result information for scene and the laboratory test of being tested pits using the acquisition of live point sampling detection method, including a seat of testing pits It marks, fill material title, water content w, grading p and compaction quality;
(4) information for utilizing step (1) and step (2) acquisition determines the roller compaction construction parameter at a place of each testing pits and is compacted effect Fruit index and this test pits a little fill material title, water content, grading and compaction quality, structure fills at the testing pits of material Sample data;
(5) correlation for analyzing compaction of earth rock material quality and roller compaction construction parameter, consolidation effect index, to determine that compaction quality returns Return the variable of model;
(6) it establishes and selects suitable compaction of earth rock material quality regression model, i.e. compaction quality assessment models;
(7) it determines current roller compaction construction work surface, starts roller compaction construction process monitoring;
(8) it is compacted monitoring system using the cubic metre of earth and stone being mounted on roller, acquires the stone roller of current roller compaction construction work surface in real time Press construction parameter and corresponding spatial positional information;
(9) using the airborne acoustic wave sensing system of compaction quality being mounted on roller, current roller compaction construction operation is acquired in real time Consolidation effect index S CV in the roller compaction process of face and corresponding spatial positional information;
(10) current roller compaction construction work surface is subjected to gridding processing, is stored in far using what step (8) and step (9) acquired Information in the database server of range monitoring platform determines the roller compaction construction parameter at each grid in roller compaction construction work surface With consolidation effect index;
(11) it using the material character for filling material title, filling material for acquiring current roller compaction construction work surface such as step (3), determines The material character of earth and stone material in current roller compaction construction work surface at each grid, material character includes water content w and grading p;
(12) rolling at each grid that the model and step (10) and step (11) established according to step (6) determine is applied The material character of work parameter, consolidation effect index value and earth and stone material can be assessed in current roller compaction construction work surface at each grid Compaction quality;
(13) compaction quality spatial interpolation methods are used, compaction quality space interpolation is carried out, obtains current roller compaction construction work surface The compaction quality value of upper any position exports compaction quality cloud atlas;
(14) compaction quality of any position obtained according to step (13), and standard is controlled according to the compaction quality of setting, Up-to-standard or unqualified region is analyzed, and calculates the qualification rate of full face compaction quality;For feedback guidance site operation, To adopt remedial measures in time to unqualified region.
4. the compaction of earth rock material quality continuous assessment method based on integrated sonic detection technology according to claim 3, special Sign is that step (6) detailed process is:The regression model variable and earth and stone material determined according to step (5) test pits at sample Notebook data establishes compaction of earth rock material quality and roller compaction construction parameter, the material character of consolidation effect index S CV and earth and stone material respectively Unitary or multiple linear, nonlinear regression model (NLRM), i.e. compaction of earth rock material Evaluation Model on Quality:Z1=F (SCV), Z2=F (v, H, f, n, SCV, w, p), Z3=F (v2,h2,f2,n2,SCV,w2,p2), F () is regression function, true by regression analysis It is fixed.
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