CN108362738A - Asphalt pavement structure damage alarm method based on the quick characteristic of power-motor - Google Patents
Asphalt pavement structure damage alarm method based on the quick characteristic of power-motor Download PDFInfo
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- CN108362738A CN108362738A CN201810104018.4A CN201810104018A CN108362738A CN 108362738 A CN108362738 A CN 108362738A CN 201810104018 A CN201810104018 A CN 201810104018A CN 108362738 A CN108362738 A CN 108362738A
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
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Abstract
The invention belongs to pavement engineering technical fields, specifically disclose a kind of asphalt pavement structure damage alarm method based on the quick characteristic of force motor, by the key mechanics index for analyzing pavement structure, and the quick characteristic regression relation of force motor for finding out conductive asphalt concrete, and then determine that pavement structure destroys limit value, finally early warning is carried out by the electric conductivity road pavement structural damage situation of ground surface material.Asphalt pavement structure damage alarm method provided by the present invention based on the quick characteristic of force motor avoids the destruction of merging sensor road pavement structural intergrity, and the expense of Pavement Performance periodic detection can be reduced, it is suitable for bituminous paving and damage alarm is carried out to its constructional aspect under different operating modes.
Description
Technical field
The present invention relates to technical field of road engineering, are related to a kind of pavement structure damage alarm method, more particularly to a kind of
Asphalt pavement structure damage alarm method based on the quick characteristic of power-motor.
Background technology
Principal mode of the bituminous paving as China's road deck, has already taken up 95% high-grade highway.Asphalt road
Face, which is typically designed, to be limited to 15 years in year, allows regularly to be repaired and conserved in life span according to the requirement of related specifications,
It is set to meet the requirement of pavement performance.Bituminous paving is generated out due to the crack reflection of semi-rigid type base during operation
It splits, track occurs for plastic deformation, and high temperature unstability generates the diseases such as track and makes the reduction of road service ability.Administrative department mostly uses
Regularly detecting, the performance of road pavement, which is regularly evaluated, timely makes Maintenance Decision making, but this periodic sensing approach,
The company with certain qualification is needed during detection and evaluation to undertake, and is required for larger fund cost every time.Have
A little administrative departments are implanted into corresponding sensor in construction process of asphalt pavement, and the stress-strain of real-time observation sensor is special
Property, road pavement performance makes evaluation；However, sensor is mostly rigid member, survival rate is general in work progress, and and pitch
Material is due to modulus difference so that measured data and actual deviation are too big, it is difficult to the change of true reaction inside asphalt pavement
Change situation.
The patent No. is in 201520592874.0 utility model patent, and disclosing one kind can be to flexible deck paving low temperature
Cracking carries out the pavement structure of self-regeneration, which changes Indirect evaluation pavement structure by the electric conductivity to material
Performance change.During implementation, by electric conductivity variation can effectively evaluating pavement structure performance change, but should
Mode is difficult to hold the extreme point of pavement structure destruction, and when pavement structure is believed that generation destruction, what situation
Down it is believed that disabler, is conserved in what situations, this is all that there is an urgent need for study.
Invention content
In order to solve the technical issues of Protective Measures of Bitumen Pavement Initial Damage present in background technology is difficult to judge, the present invention provides
It is a kind of to react Pavement Performance situation in real time, can avoid since road surface early disease cannot be found in time and later stage disease
It is difficult to repair the asphalt pavement structure damage alarm method based on the quick characteristic of power-motor for the various problems brought.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of asphalt pavement structure damage alarm method based on the quick characteristic of power-motor, it is characterised in that：The method packet
Include following steps：
1) it prepares conducting concrete and determines the key mechanics index of conducting concrete, the key mechanics index is conductive
The indirect tensile strength of concrete；
2) conducting concrete that step 1) is prepared is sampled, and the sampling sample of conducting concrete is closed
Bonding force index test and the resistivity measurement for sampling sample, strain and the change in resistance relationship for establishing sampling sample are bent
Line；
3) strain and change in resistance relation curve that obtained sampling sample is established according to step 2) determine conductive coagulation
The limit of rupture of the soil when forming pavement structure；
4) results of regular determination conducting concrete is formed by the conductivity of the bituminous concrete of pavement structure, really with step 3) institute
The fixed limit of rupture is compared, and evaluation conducting concrete is formed by the extent of the destruction of pavement structure, if the extent of the destruction is big
In or equal to when the limit of rupture, carrying out disease early warning determined by step 3), to conducting concrete be formed by pavement structure into
Row is repaired and maintenance；If the extent of the destruction is less than the limit of rupture determined by step 3), without disease early warning.
Preferably, in step 1), when preparing conducting concrete, gold is laid in layer position below conducting concrete in advance
Belong to silk electrode, and roller-compaction, forms conducting concrete.
Preferably, the specific implementation being sampled to the conducting concrete that step 1) is prepared in step 2)
It is：It after conducting concrete is transported scene to be laid, is sampled during paving, and to sampling sample compaction moulding
Test specimen to be measured.
Preferably, the specific implementation of key mechanics index test is carried out in step 2) to the sampling sample of conducting concrete
Mode is：The anti-shearing deformability of sampling sample is evaluated using indirect stretching experiment.
Preferably, establishing the specific implementation of the strain and change in resistance relation curve of sampling sample in step 2)
It is：
A) the sampling sample that field sampling obtains is cut according to the requirement of Indirect Tensile Tests size, is gone forward side by side in the ranks
Indirect Tensile Tests are connect, the conductivity of test sampling sample while carrying out indirect Indirect Tensile Tests；
B) strain during Indirect Tensile Tests is summarized with conductivity, obtains strain and change in resistance relationship
Curve；The strain includes two different phases mutually continued, i.e. first stage and second with change in resistance relation curve
Stage, the strain value of the second stage are more than the strain value of first stage；
The strain of first stage is with change in resistance relational expression：Y=0.0001x+0.2283, R2=0.925；
The strain of second stage is with change in resistance relational expression：Y=2E-07x2- 4E-05x+0.2818, R2=
0.9515；
Wherein：
X is the strain value for sampling sample during Indirect Tensile Tests；
Y is the resistivity for sampling sample during Indirect Tensile Tests.
Preferably, in step 3) limit of rupture really fixed condition when sampling sample during Indirect Tensile Tests
The limit of rupture takes place when reaching maximum strain value 65%~70% in strain.
It is an advantage of the invention that：
The present invention provides a kind of asphalt pavement structure damage alarm method based on the quick characteristic of power-motor, this method packets
It includes conducting concrete preparation and key mechanics index determines, with Pavement Performance correlation maximum, the most significant mechanical index of response
To evaluate the key mechanics index of road surface pavement performance；By conductive asphalt concrete field sampling, key mechanics index survey is carried out
The correlation of the two is established in examination, while the situation of change of test resistance rate, the correlated performance of regression analysis mechanical index and resistivity
Relationship；Laboratory test combining with theoretical analysis, determine mechanical index when pavement structure will occur fine fisssure, when disease mutation,
When loss of structure function, and analyze change in resistance rule at this time, determine and destroyed by the pavement structure of index of resistivity
The limit；Using the time as interval, the conductivity of fixed time test pavement structure bituminous concrete, and with the limit of rupture pair of setting
Than evaluating structural damage degree, when more than the limit of rupture, carrying out disease early warning immediately, relevant departments take measures on customs clearance
Carry out pavement structure reparation, maintenance.The present invention is difficult to find for bituminous paving early disease, disease development it is difficult to predict ask
Topic, proposes new Asphalt Pavement Damage method for early warning, compared with the conventional method, has following advantageous effects：1) do not exist
The larger sensor of rigidity is buried in bituminous paving, road pavement structural behaviour does not influence significantly；2) it can react in real time,
The performance losses situation of bituminous paving, road pavement performance losses carry out early warning；3) there is better economic benefit；It 4) can be on road
Face repeatedly after repair, persistently uses.The present invention has fully considered conductive mixed by materials conductive characteristic and mechanical characteristic correlation
The relationship of solidifying natural asphalt road surface pavement performance variation and electric conductivity, establishes the correlation of the two.The damage of road pavement performance carries out
Real-time early warning.Data information is provided for pavement maintenance ＆ rehabilitation, is instructed for Maintenance Decision making, it is timely by the conductive characteristic of material
It predicts Pavement Performance variation, lays the foundation for the popularization and application of conducting concrete.
Description of the drawings
Fig. 1 is the curve graph of the strain and conductivity variation during Indirect Tensile Tests；
Fig. 2A is the strain and the relation curve of change in resistance in the first stage during Indirect Tensile Tests；
Fig. 2 B be strain during Indirect Tensile Tests with change in resistance second stage relation curve.
Specific implementation mode
The present invention provides a kind of asphalt pavement structure damage alarm method based on the quick characteristic of power-motor, this method packets
Include following steps：
1) it prepares conducting concrete and determines the key mechanics index of conducting concrete, key mechanics index is conductive coagulation
The indirect tensile strength of soil；
2) conducting concrete that step 1) is prepared is sampled, and the sampling sample of conducting concrete is closed
Bonding force index test and the resistivity measurement for sampling sample, strain and the change in resistance relationship for establishing sampling sample are bent
Line；
3) strain and change in resistance relation curve that obtained sampling sample is established according to step 2) determine conductive coagulation
The limit of rupture of the soil when forming pavement structure；
4) results of regular determination conducting concrete is formed by the conductivity of the bituminous concrete of pavement structure, really with step 3) institute
The fixed limit of rupture is compared, and evaluation conducting concrete is formed by the extent of the destruction of pavement structure, if the extent of the destruction is big
In or equal to when the limit of rupture, carrying out disease early warning determined by step 3), to conducting concrete be formed by pavement structure into
Row is repaired and maintenance；If the extent of the destruction is less than the limit of rupture determined by step 3), without disease early warning.
The specific implementation of conducting concrete in the preparation is：
It will gather materials and be heated to 180 DEG C, maintain 5 hours；Pitch is heated to 165 DEG C；To first it gather materials, carbon fiber addition is mixed and stirred
50s is stirred in pot, adds asphalt mixing 90s, is eventually adding miberal powder, graphite powder stirring 60s；Conducting concrete is transported and is waited for
It is laid with scene, is paved, and lay wire electrode, roller-compaction.When preparing conducting concrete, in advance in conducting concrete
Wire electrode, and roller-compaction are laid in cutting optimal position, form conducting concrete.
The specific implementation being sampled to the conducting concrete that step 1) is prepared in step 2) is：Conduction is mixed
It after solidifying soil transports scene to be laid, is sampled during paving, and to sampling sample compaction moulding test specimen to be measured.
Carrying out the specific implementation of key mechanics index test in step 2) to the sampling sample of conducting concrete is：It adopts
The anti-shearing deformability of sampling sample is evaluated with indirect stretching experiment.
The strain for sampling sample and the specific implementation of change in resistance relation curve are established in step 2) is：
A) the sampling sample that field sampling obtains is cut according to the requirement of Indirect Tensile Tests size, is gone forward side by side in the ranks
Indirect Tensile Tests are connect, the conductivity of test sampling sample while carrying out indirect Indirect Tensile Tests；
B) strain during Indirect Tensile Tests is summarized with conductivity, obtains strain and change in resistance relationship
Curve；Strain and change in resistance relation curve include two different phases mutually continued, i.e. first stage and second stage,
The strain value of second stage is more than the strain value of first stage；
The strain of first stage is with change in resistance relational expression：Y=0.0001x+0.2283, R2=0.925；
The strain of second stage is with change in resistance relational expression：Y=2E-07x2- 4E-05x+0.2818, R2=
0.9515；
Wherein：
X is the strain value for sampling sample during Indirect Tensile Tests；
Y is the resistivity for sampling sample during Indirect Tensile Tests.
Fixed condition is when strain of sampling sample during Indirect Tensile Tests reaches to the limit of rupture really in step 3)
The limit of rupture takes place when maximum strain value 65%~70%.
The technical program is further described with reference to embodiment, but the present invention is not limited to these Examples.
Embodiment 1
(1) prepared by conducting concrete
It will gather materials and be heated to 180 DEG C, maintain 5 hours；Pitch is heated to 165 DEG C.To first it gather materials, carbon fiber addition is mixed and stirred
50s is stirred in pot, adds asphalt mixing 90s, is eventually adding miberal powder, graphite powder stirring 60s.Conducting concrete is transported existing
, it paves, and lay wire motor, roller-compaction.It in paving process, is sampled, interior is molded using rotary compactor
Test specimen.
(2) key mechanics index determines
The destruction for " changing black " asphalt concrete pavement in the present embodiment in vain is mostly that tensile fatigue destroys, and is stretched in fact using indirect
Its anti-shearing deformability can be evaluated by testing, to evaluate its intensity, using indirect tensile strength as key mechanics index.
(3) the quick specificity analysis of conducting concrete force motor
The molding test specimen of field sampling is cut according to the requirement of Indirect Tensile Tests size, goes forward side by side and in the ranks connects indirectly
Tension test, while testing its conductivity.Strain during Indirect Tensile Tests is subjected to Macro or mass analysis, experiment with conductivity
The results are shown in Figure 1：
It is obvious that two benches are presented in strain correlation related to resistivity, the correlation of the two is found in analysis in two stages,
Referring to Fig. 2A and Fig. 2 B, alert and resourceful characteristic relevance formula is obtained.
Period is not destroyed in pressure drag bituminous concrete, and with the increase of strain, resistivity continuously decreases.It is smaller straining
Stage, resistivity are gradually lowered to 0.283M Ω m from 0.319M Ω m, and conic section variation rule are presented in resistivity and strain
Rule.Then resistivity and strain are gradually presented, linear relationship.
(4) limit of rupture determines
By trial curve：Initial strain is 0 ε, and resistivity is 0.319M Ω m；Strain when destruction is
0.00268 ε, resistivity are 0.226M Ω m；During experiment, resistivity has dropped 0.093M Ω m, and strain increases
0.00268ε.The smaller stage is being strained, conic section changing rule is presented in resistivity and strain, and the strain of this stage progressivelyes reach
When 0.00189 ε, resistivity falls to 0.277M Ω m, and strain has reached 70% of maximum strain when destroying, and resistivity declines
11%.Resistivity drop-out value has reached total changing value and has obtained 45%.Later stage, resistivity and the basic presentation linear relationship of strain, but
Local resistivity amplitude of variation increases, relatively gradually disorderly, and internal fine fisssure gradually expands at this time, until destroying.Therefore, it examines
Consider engineering safety, it is structure breakdown point to draft resistivity and strain stress relation to be changed into the point of linear relationship from curved line relation.Therefore
Using this strain variation rate as the limiting value for judging structure destruction, i.e., strain value is obtained by resistance rate conversion, when strain reaches
It will be destroyed when maximum strain value 70% or so, it is necessary to carry out maintenance, otherwise will develop into structural destruction.
(5) pavement disease early warning
At interval of the time, the conductivity of test pavement structure bituminous concrete is compared with the limit of rupture of setting, if reaching
To the limit of rupture, disease early warning is carried out immediately, and relevant departments, which take measures on customs clearance, carries out pavement structure reparation, maintenance.
The present invention is by a large amount of research and experiment, the results showed that, the present invention is based on the bituminous pavings of the quick characteristic of power-motor
Structure damage alarm method can effectively reflect that the stress-strain on road surface changes feelings by the change in resistance of conducting concrete
Condition.The economic problems for overcoming traditional periodic detection can be used as a kind of Pavement Performance indirect method and be promoted and applied.
The above is only the exemplary embodiments of the present invention, not does any restrictions to the present invention, every according to invention skill
Art essence still falls within technical solution of the present invention to any simple modification, change and equivalence change made by above example
Protection domain in.
Claims (6)
1. a kind of asphalt pavement structure damage alarm method based on the quick characteristic of power-motor, it is characterised in that：The method includes
Following steps：
1）It prepares conducting concrete and determines the key mechanics index of conducting concrete, the key mechanics index is conductive coagulation
The indirect tensile strength of soil；
2）To step 1）The conducting concrete being prepared is sampled, and carries out crucial power to the sampling sample of conducting concrete
It learns index test and samples the resistivity measurement of sample, establish strain and the change in resistance relation curve of sampling sample；
3）According to step 2）The strain and change in resistance relation curve for establishing obtained sampling sample determine that conducting concrete exists
Form limit of rupture when pavement structure；
4）Results of regular determination conducting concrete is formed by the conductivity of the bituminous concrete of pavement structure, with step 3）It is identified
The limit of rupture is compared, and evaluation conducting concrete is formed by the extent of the destruction of pavement structure, if the extent of the destruction be more than or
Equal to step 3）When the identified limit of rupture, disease early warning is carried out, pavement structure is formed by conducting concrete and is repaiied
Multiple and maintenance；If the extent of the destruction is less than step 3）When the identified limit of rupture, then without disease early warning.
2. the asphalt pavement structure damage alarm method according to claim 1 based on the quick characteristic of power-motor, feature exist
In：The step 1）In, when preparing conducting concrete, layer lays wire electrode below conducting concrete in advance, and
Roller-compaction forms conducting concrete.
3. the asphalt pavement structure damage alarm method according to claim 2 based on the quick characteristic of power-motor, feature exist
In：The step 2）In to step 1）The specific implementation that the conducting concrete being prepared is sampled is：Conduction is mixed
It after solidifying soil transports scene to be laid, is sampled during paving, and to sampling sample compaction moulding test specimen to be measured.
4. the asphalt pavement structure damage alarm method according to claim 3 based on the quick characteristic of power-motor, feature exist
In：The step 2）In carry out the specific implementation of key mechanics index test to the sampling sample of conducting concrete and be：It adopts
The anti-shearing deformability of sampling sample is evaluated with indirect stretching experiment.
5. the asphalt pavement structure damage alarm method according to claim 4 based on the quick characteristic of power-motor, feature exist
In：The step 2）The middle strain for establishing sampling sample and the specific implementation of change in resistance relation curve are：
a）The sampling sample that field sampling obtains is cut according to the requirement of Indirect Tensile Tests size, is gone forward side by side between in the ranks connecing
Tension test is connect, the conductivity of test sampling sample while carrying out indirect Indirect Tensile Tests；
b）Strain during Indirect Tensile Tests is summarized with conductivity, obtains strain and change in resistance relationship song
Line；The strain includes two different phases mutually continued, i.e. first stage and second-order with change in resistance relation curve
Section, the strain value of the second stage are more than the strain value of first stage；
The strain of first stage is with change in resistance relational expression：Y=0.0001x+0.2283, R2=0.925；
The strain of second stage is with change in resistance relational expression：y=2E-07x2- 4E-05 x+0.2818, R2=0.9515；
Wherein：
X is the strain value for sampling sample during Indirect Tensile Tests；
Y is the resistivity for sampling sample during Indirect Tensile Tests.
6. the asphalt pavement structure damage alarm method according to claim 5 based on the quick characteristic of power-motor, feature exist
In：The step 3）Really fixed condition is when strain of sampling sample during Indirect Tensile Tests reaches most to the middle limit of rupture
The limit of rupture takes place when big strain value 65% ~ 70%.
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Cited By (3)
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| CN109827999A (en) * | 2019-03-19 | 2019-05-31 | 南京工程学院 | A kind of building performance monitoring system based on conducting concrete |
| CN116143476A (en) * | 2023-02-22 | 2023-05-23 | 浙江交工金筑交通建设有限公司 | Conductive concrete, application and self-detection system |
| ES2959888A1 (en) * | 2023-09-22 | 2024-02-28 | Univ Madrid Politecnica | System and procedure for measuring the electrical resistance of an asphalt layer, asphalt pavement that includes it and procedure for obtaining said asphalt pavement |
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