CN102953313B - A kind of monitoring method of graded broken stone isolation - Google Patents
A kind of monitoring method of graded broken stone isolation Download PDFInfo
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- CN102953313B CN102953313B CN201210418535.1A CN201210418535A CN102953313B CN 102953313 B CN102953313 B CN 102953313B CN 201210418535 A CN201210418535 A CN 201210418535A CN 102953313 B CN102953313 B CN 102953313B
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Abstract
The present invention relates to the monitoring method technology of a kind of graded broken stone isolation, the method comprises the following steps: by the modulus of resilience in hammer-falling deflectometer detection graded broken stone layer section, draw scattergram, statistics isolation proportion and distribution.The method can effectively evaluating graded broken stone mixture isolation degree, reflect construction level intuitively, quality control on construction is provided objective reference index, and then ensure engineering total quality, improve the service life of engineering, reduce life-cycle investment, so significant to the service level and economic benefit improving highway.
Description
Technical field:
The present invention relates to a kind of engineering analysis method, be more particularly to a kind of graded broken stone isolation analysis method.
Background technology:
For many years, semi-rigid asphalt pavement is always the primary structure form of China Higher level asphalt highway.But,
The problems such as road surface the most progressively exposes that crack is serious, water resistant evil ability, service life are short, have had a strong impact on height
The utilization benefit of speed highway and service efficiency.
The problem existed in view of semi-rigid type base, had the most once carried out substantial amounts of research and trial.Major measure includes increasing
Thickness of bituminous surface, add geotextile intermediate layer, add Asphalt Stabilized Macadam intermediate layer, to add graded broken stone intermediate layer etc. several
Class.According to China's Asphalt Pavement with Flexible Base behaviour in service investigation, domestic build flexbile base is divided into two stages.First
The individual stage using flexbile base (graded broken stone base or interlayer) as the measure preventing Reflective Crack over Asphalt Pavement with Semi-rigid
The research carried out.Flexbile base is carried out by second stage as the major measure extending the Asphalt Pavement of Highway life-span
Research.
From the point of view of being investigated by the service condition of China's flexbile base and graded broken stone transition zone basic unit: use graded broken stone base, can
To significantly reduce the reflection crack problem of the cracking of bituminous paving, particularly semi-rigid asphalt pavement, it is possible to obtain preferably
Effect.The history that China attempts employing flexbile base in Asphalt Pavement of Highway is the shortest.Although having built some examinations
The section of testing, but large-area construction also belongs to blank, does not substantially have what experience, and the Long Life Asphalt Pavement of developed countries is almost
Being all flexbile base and complete thick formula asphalt concrete pavement, the most substantial amounts of foreign technology can be used for reference, but region, traffic loading,
The aspects such as the industrialization level of processing of environment, material, particularly material, the peopleware of construction team and management level exist
Greatest differences, makes us can not be by external technology.One long-life road surface depends on high-quality design, constructs and run
The maintenance management of phase.Therefore, high-quality construction is to ensure that the important step of Long Life Pavement.
In this context, carry out flexbile base (graded broken stone layer) construction quality (isolation) analyze method research for
Ensure the construction quality of asphalt pavement of highway structure and service life, so to improve China's highway service level and
Economic benefit is significant.But Chinese scholars rarely has research to the isolation analysis of graded broken stone, in order to fill up this at present
Blank, the present invention provides the technical scheme of a kind of graded broken stone isolation analysis method.
Summary of the invention:
It is an object of the invention to provide the monitoring method of a kind of graded broken stone isolation, the method can be mixed by effectively evaluating graded broken stone
Close the degree of material isolation, quality control on construction is provided objective reference index, and then ensures engineering total quality.
For achieving the above object, the present invention is by the following technical solutions: said method comprising the steps of: examine with hammer-falling deflectometer
Survey the modulus of resilience in graded broken stone layer section, draw scattergram, statistics isolation proportion and distribution.
The monitoring method of a kind of graded broken stone isolation that the present invention provides, described hammer-falling deflectometer includes: loading plate, guide rod, fall
Hammer and data collecting transmitter；Described guide rod is vertically installed on described loading plate, is provided with its center through described dropping hammer
Horizontal and vertical orthogonal hole, described guide rod is through the longitudinal hole active link dropped hammer；Described dropping hammer is provided with stop pin and lock
Determining bolt, the tail end of described stop pin intersects in the center dropped hammer through the transverse holes dropped hammer with guide rod, and described locking bolt is fixed on
The tail end of described dead bolt；Described load transducer is provided above cushion pad；Load transducer and position are set on described loading plate
Displacement sensor；The data acquisition transmitting device being connected with main frame by interface gathers described load transducer and the letter of displacement transducer
Number, and transmit a signal to main frame；
Described data acquisition transmitting device includes power supply, shell, data acquisition module, cpu controller, display and interface；
Described cpu controller includes that initialization module, data reception module, data processing module, data disaply moudle, data are transmitted
Module and data statistics module；After module and port initialization, by the data gathered by the transmission of described data reception module to counting
According to processing module, data processing module is connected with data disaply moudle, data transmission module and data statistics module respectively, it is achieved
Data show, data are transmitted and data storage function.
The monitoring method of a kind of graded broken stone isolation that the present invention provides, being distributed as of the vertical and horizontal measuring point in detection section: horizontal
To distance highway sideline 0.7-0.8m, horizontal measuring point and measuring point spacing are 0.5-2m；Longitudinal measuring point is 5-10m with measuring point spacing,
Detect a length of 100-300m.
The monitoring method of another preferred a kind of graded broken stone isolation that the present invention provides, described lateral separation highway sideline optimal
Value is 0.75m, and horizontal measuring point and measuring point spacing optimum are 1m；Longitudinal measuring point is 5m with measuring point spacing optimum, detects length
Optimum is 200m.
The monitoring method of another preferred a kind of graded broken stone isolation that the present invention provides, described each measuring point detection number of times is 4 times,
Reject testing result for the first time, using the average of rear 3 testing results as measuring point modulus of resilience test result.
The monitoring method of another preferred a kind of graded broken stone isolation that the present invention provides, determines the modulus of resilience rank in surveyed section.
The monitoring method of another preferred a kind of graded broken stone isolation that the present invention provides, described load transducer and displacement transducer
Distinguish load and displacement that recording carrying plate occurs due to impulsive force.
The monitoring method of another preferred a kind of graded broken stone isolation that the present invention provides, described impulsive force falls due to securing rod release
Hammer, drops hammer and is formed along guide rod free-falling impact loading plate.
The monitoring method of another preferred a kind of graded broken stone isolation that the present invention provides, described dismountable guide rod by top guide bar and
Lower guide rod forms.
The monitoring method of another preferred a kind of graded broken stone isolation that the present invention provides, described detection section is high-quality graded broken stone
As upper basic unit, semi-rigid material is as subjacent bed, and described detection section is detected after rolling also health preserving 7 days.
With immediate prior art ratio, the technical scheme that the present invention provides provides the benefit that: select hammer-falling deflectometer to grating
Metalling isolation is evaluated embodying the stressing conditions that road surface is actual, and this equipment is simple to operate simultaneously, it is simple to carry, and transport
Convenient, improve test job efficiency, save human and material resources, it is simple to large-scale promotion.
Being by the advantage of dynamic modulus analysis: road surface load is typical dynamic impulsion load, it is real that dynamic modulus can embody road surface
The stressing conditions on border；Due to force-bearing situation and the difference of mechanical characteristic, dynamic modulus can characterize again pavement structure working condition.
By modulus of resilience metrics evaluation graded broken stone construction quality, this index characterization important parameter of graded broken stone rigidity, grating
The uneven of structural strength has been reacted again in the change of the construction rebound modulus of metalling, and therefore we are available on-the-spot to graded broken stone
Basic unit's modulus a little of deploying to ensure effective monitoring and control of illegal activities position targetedly accurately analyzes its isolation situation.
The method can effectively evaluating graded broken stone mixture isolation degree, reflect construction level intuitively, to construction matter
Amount control provides objective reference index, and then ensures engineering total quality, improves the service life of engineering, reduces the life-cycle
Investment, so significant to the service level and economic benefit improving highway.
Accompanying drawing explanation
Fig. 1 is the method schematic diagram of the present invention；
Fig. 2 is the structural representation that measuring point distribution is analyzed in graded broken stone leafing of the present invention analysis；
Fig. 3 is that graded broken stone of the present invention isolates degree criterion schematic diagram；
Fig. 4 is that graded broken stone leafing of the present invention analyses distributed data figure；
Wherein, 1-top guide bar, 2-loading plate, 3-drops hammer, 4-load transducer, 5-cushion pad, 6-displacement transducer, 7-master
Machine, 8-graded broken stone layer, 9-lower guide rod, 10-data acquisition transmitting device, 11-stop pin, 12-locking bolt.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be described in further detail.
Embodiment 1:
As it is shown in figure 1, the invention of this example uses hammer-falling deflectometer to completing to roll and graded broken stone layer after health preserving 7 days is carried out
Detection, Testing index is graded broken stone layer 8 modulus of resilience.The formula hammer-falling deflectometer of taking includes:
Loading plate 2, guide rod, drop hammer 3 and data collecting transmitter 10；Described guide rod is vertically installed on described loading plate 2,
In the described 3 horizontal and vertical orthogonal holes being provided with its center through of dropping hammer, described guide rod through drop hammer 3 longitudinal hole live
Dynamic link；Described dropping hammer 3 is provided with stop pin 11 and locking bolt 12, the tail end of described stop pin 11 through the transverse holes dropped hammer with
Guide rod intersects in the center dropped hammer, and described locking bolt 12 is fixed on the tail end of described dead bolt 11；Described load transducer
4 are provided above cushion pad 5；Load transducer 4 and displacement transducer 6 are set on described loading plate 2；By interface and main frame 7
The data acquisition transmitting device 10 connected gathers described load transducer 4 and the signal of displacement transducer 6, and transmits a signal to
Main frame 7；
Top guide bar 1 and lower guide rod 9 are detachable, it is simple to carry, and described loading plate 2 weight 15kg, thickness are 20mm, described in drop hammer
3 weight 10kg.
As in figure 2 it is shown, mark measuring point on the graded broken stone layer 8 in the detection section rolled and after health preserving 7 days, measuring point is distributed
For: lateral separation highway sideline 0.75m, measuring point and measuring point spacing are 1m；Longitudinal measuring point is 5m with measuring point spacing, detects a length of
200m.Drawn markings on section need to detected before detection.
Assembling hammer-falling deflectometer, top guide bar 1 and lower guide rod 9 are attached, selection diameter 30cm, weight 15kg, thickness are
The loading plate 2 of 20mm, 3 is promoted to 85cm height along guide rod by dropping hammer of a 10kg, then discharges, allow its free-falling,
The 3 impact loading plates 2 that drop hammer produce impact load, and under Impact Load, loading plate 2 produces vertical displacement, and load senses
Load and displacement record are got off by device 4 and displacement transducer 6, and export this signal to data acquisition transmitting device 10, then will
Main frame 7 is transmitted a signal to by data acquisition transmitting device 10.
By equipment placement in measuring point position, each measuring point detection number of times is 4 times, rejects testing result for the first time, by rear 3 detection knots
The average of fruit is as measuring point modulus of resilience test result.
Test result is determined by modulus of resilience formula, modulus of resilience measure equation Ep=2 π pa (1-μ2)/4l；
Wherein p is the loading plate pressure of actual measurement, and a is loading plate radius, and μ is Poisson's coefficient, and l is in the loading plate of actual measurement
Heart flexure.
As it is shown on figure 3, choosing modulus of resilience value 400MPa is desired value, sentence with the difference of desired value with the measured value of the modulus of resilience
Dialysis analysis degree.Wherein non-isolated modulus ranges is 380 ~ 420MPa；Surface compact modulus ranges be 360 ~ 380Mpa or
420~440MPa；Slight isolation modulus ranges is 340 ~ 360Mpa or 440 ~ 460MPa；Moderate isolation modulus ranges is 320 ~ 340Mpa
Or 440 ~ 460MPa；Severe isolation modulus ranges is 0 ~ 320Mpa or 480 ~+∞ MPa.
As shown in Figure 4, draw isolation spatial data scattergram, add up all kinds of isolation according to testing result respectively with isolation scattergram
Proportion and distribution mode, analyze detection section isolation state, provide foundation intuitively for quality control on construction.
Finally should be noted that: above example is only in order to illustrate that technical scheme is not intended to limit, although with reference to upper
Stating embodiment to be described in detail the present invention, those of ordinary skill in the field are it is understood that still can be to the present invention
Detailed description of the invention modify or equivalent, and any amendment or equivalent without departing from spirit and scope of the invention is replaced
Changing, it all should be contained in the middle of present claims scope.
Claims (6)
1. a monitoring method for graded broken stone isolation, said method comprising the steps of: detect graded broken stone with hammer-falling deflectometer
The modulus of resilience in layer section, draws scattergram, statistics isolation proportion and distribution；
Described hammer-falling deflectometer includes: loading plate, guide rod, drop hammer and data collecting transmitter；Described guide rod is vertically installed in
On described loading plate, being provided with the horizontal and vertical orthogonal hole at its center through described dropping hammer, described guide rod is through dropping hammer
Longitudinal hole active link；Described dropping hammer is provided with stop pin and locking bolt, the tail end of described stop pin through the transverse holes dropped hammer with
Guide rod intersects in the center dropped hammer, and described locking bolt is fixed on the tail end of dead bolt；Load sensing is set on described loading plate
Device and displacement transducer；Described load transducer is provided above cushion pad；The data acquisition transmission dress being connected with main frame by interface
Put the described load transducer of collection and the signal of displacement transducer, and transmit a signal to main frame；
Described data acquisition transmitting device includes power supply, shell, data acquisition module, cpu controller, display and interface；
Described cpu controller includes that initialization module, data reception module, data processing module, data disaply moudle, data are transmitted
Module and data statistics module；Described initialization module, data reception module, data processing module, data disaply moudle, number
After transport module and data statistics module and power supply, data acquisition module, display and interface initialization, the data that will gather
Being transmitted to data processing module by described data reception module, data processing module transmits with data disaply moudle, data respectively
Module and data statistics module connect, it is achieved data show, data are transmitted and data storage function；
Detection section is that semi-rigid material is as subjacent bed as upper basic unit for high-quality graded broken stone, and described detection section is rolled and supported
Detect after raw 7 days；
The lateral separation length of highway sideline is 0.75m, and horizontal measuring point is 1m with the length of measuring point spacing；Longitudinal measuring point and measuring point
The length of spacing is 5m, and the length of detection length is 200m.
The monitoring method of a kind of graded broken stone the most as claimed in claim 1 isolation, it is characterised in that: described each measuring point detects
Number of times is 4 times, rejects testing result for the first time, using the average of rear 3 testing results as measuring point modulus of resilience test result.
The monitoring method of a kind of graded broken stone the most as claimed in claim 1 isolation, it is characterised in that: determine returning of surveyed section
Play modulus rank.
A kind of graded broken stone the most as claimed in claim 1 isolation monitoring method, it is characterised in that: described load transducer and
The displacement transducer load that recording carrying plate occurs due to impulsive force respectively and displacement.
The monitoring method of a kind of graded broken stone the most as claimed in claim 4 isolation, it is characterised in that: described impulsive force is due to lock
Fixed pole release is dropped hammer, and drops hammer and is formed along guide rod free-falling impact loading plate.
The monitoring method of a kind of graded broken stone the most as claimed in claim 1 isolation, it is characterised in that: described guide rod is for be led from above
Bar and the detachable guide rod of lower guide rod composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210418535.1A CN102953313B (en) | 2012-10-26 | 2012-10-26 | A kind of monitoring method of graded broken stone isolation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210418535.1A CN102953313B (en) | 2012-10-26 | 2012-10-26 | A kind of monitoring method of graded broken stone isolation |
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| CN102953313A CN102953313A (en) | 2013-03-06 |
| CN102953313B true CN102953313B (en) | 2016-10-12 |
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| CN107142822B (en) * | 2017-04-28 | 2019-08-06 | 华侨大学 | A kind of roadbed cavity detection device and its detection method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6497930B1 (en) * | 2001-04-11 | 2002-12-24 | Gerald D. Petermeier | Process for recycling asphalt shingles and product produced thereby |
| CN1880579A (en) * | 2005-06-13 | 2006-12-20 | 郑州大学 | Application technology of falling weight deflectometer and ground penetrating radar in pavement construction |
| CN101250848A (en) * | 2008-03-24 | 2008-08-27 | 山东省交通科学研究所 | Agitation type pavement deflection tester |
| CN202073124U (en) * | 2011-03-30 | 2011-12-14 | 江苏省交通科学研究院股份有限公司 | Handheld type drop hammer deflectometer |
-
2012
- 2012-10-26 CN CN201210418535.1A patent/CN102953313B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6497930B1 (en) * | 2001-04-11 | 2002-12-24 | Gerald D. Petermeier | Process for recycling asphalt shingles and product produced thereby |
| CN1880579A (en) * | 2005-06-13 | 2006-12-20 | 郑州大学 | Application technology of falling weight deflectometer and ground penetrating radar in pavement construction |
| CN101250848A (en) * | 2008-03-24 | 2008-08-27 | 山东省交通科学研究所 | Agitation type pavement deflection tester |
| CN202073124U (en) * | 2011-03-30 | 2011-12-14 | 江苏省交通科学研究院股份有限公司 | Handheld type drop hammer deflectometer |
Non-Patent Citations (1)
| Title |
|---|
| 应用PFWD进行级配碎石基层施工质量监控的研究;吴琛;《科学技术与工程》;20120430;第12卷(第10期);第2491-2493页 * |
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