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Dynapac Documentation System Soil Compaction

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Dynapac Documentation SystemSoil Compaction

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Dynapac’s experience o surace covering compaction con-trol dates rom the late 70s. Since then we have oered ourcustomers the opportunity to control the compaction work in real time and to document the completed work or impro-ved quality control, rom the rst display instruments via belt

printers and simple computers to today’s advanced but stilluser-riendly systems.

 The compaction meter registers the movement o the drum inthe vertical plane. This movement changes as the compactionincreases and the rigidity o the underlying surace increases.In principle it can be compared with bouncing a gol ball ondierent suraces. On loose suraces (non-compacted sand)there is basically no bounce, while on a hard surace (concrete)there is a very good bounce. The better the bounce, the hig-her the CMV. We do not know, however, exactly how high the

Dynapac Documentation SystemBackground

Dynapac’s documentation system is built up in three levels. Atthe basic level there is the compaction meter. This can then beexpanded with increasingly more advanced documentationtools in the orm o computers mounted on the roller with di-erent positioning systems. The compaction meter consists o the ollowing main parts:

1. Sensor (accelerometer)2. Processor unit3. Display instrument

 The sensor registers the vibratory movement o the roller andthis inormation is then transerred to the processor, where it is

analysed. The analysed inormation is presented on the displayinstrument as a digital value, CMV (Compaction Meter Value).A high or low measurement range (CMV 0-150 and 0-50) canbe selected with a switch on the instrument panel.

  The compaction meter provides a relative measurement o rigidity o the surace. This increases with an increase in thecompaction and is refected in a rising CMV. An accelerometercontinuously measures the compaction orces that occur asthe vibratory drum works the surace. The signals rom the ac-celerometer change as the surace becomes harder and morestable. The signals are then converted via a patented principleto values that can be read on the roller’s instrument panel. The

compaction meter value (CMV), which is non-dimensional, canbe calibrated to the test method used or acceptance inspection(degree o compaction, deormation module (Ev2) ETC). Eachnew compaction job is thereore initiated by compacting testareas to dierent levels and in this way correlating CMV to thedegree o compaction.

DCA is an abbreviation o Dynapac Compaction Analyzer. Itregisters all the CMV data and allows the operator to see thecompaction results on the computer screen. On the basis o experience or an existing calibration, the CMV limiting valuecan be used or each separate compaction job. The DCA willthen indicate precisely which areas require additional com-paction. The computer gives the operator a graphic image o 

the completed compaction work. Variations in CMV are shownas dierent colours on the surace and it is thereore easy toidentiy weaker areas and take the requisite action. In most

Introduction

cases it is sucient to make additional runs over an area toachieve satisactory compaction, but some areas may needto be improved by excavating poor material and replacing itwith new material.

  The DCA unit is portable and the measurement results canthereore be taken into the oce and studied. It is also easy totranser the measurement data to a standard PC by means o a memory card so that it can be permanently stored.

Compaction meter The display instrument gives the roller operator continuousinormation on the increase in compaction and any weak areas.

At the end o the compaction work the CMV stabilises and theBouncing warning starts to fash. This indicates that the machinecannot signicantly improve the compaction and that urtherruns are uneconomical.

Compaction meter with DCA The same unction as above, but with the opportunity to docu-ment the end results or quality assurance and as an indicationor acceptance inspection. The DCA can be set to show two ormore suraces with the lowest CMV (least bearing strength). The compaction documentation is stored in the computer andcan easily be transerred to other computers or more detailedanalysis or printout. It is also possible in DCA to calibrate CMV to

static fat loads, and thereby obtain a receipt when the correctcompaction has been achieved.

Compaction meter with DCA-GPS The same unction as above, but all the runs can be documen-ted which gives the roller operator ull control o the increasein compaction over the entire area. The DCA also shows theposition o the roller in relation to a selected reerence line orthe section, which eliminates the need or extra setting outto orientate the operator. The analysis unction enables thecompaction work to be replayed to assess i the roller has beenused eciently or i the roller pattern needs to be optimized.At the same it is possible to see how many runs have been al-located over the surace and which CMV have been achieved.

 The results rom the acceptance inspection can be entered inthe DCA so that the results rom quality control can be collectedtogether in one place.

bounce is (or how well-compacted the area is). This requiresthe compaction meter to be calibrated to the static fat loador the density values.

Regardless o whether the system has been calibrated or not,

the roller operator continuously receives inormation on theincrease in the compaction, whereby an increasing CMV me-ans an increase in the compaction. When the increase in CMVlevels o you start to approach the limit to what the machinecan achieve on the surace in question, and urther compactioncan be uneconomic or even damaging.  The compaction meter also gives an indication as to whether thearea is uniormly compacted (the same CMV over the entire area)or i the surace has irregular rigidity (large variations in CMV).

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Compaction meter

A Dynapac roller with a compaction meter is muchmore than just a compaction machine. The compac-tion meter gives the roller operator inormation onthe increase in compaction or each run, it showsvariations in the rigidity o the underlying surace,it can localize weak areas, and it indicates when thematerial is ully compacted. The compaction meteralso tells the roller operator i the roller does double jumps, which can damage both the roller and the

compacted material. Avoiding double jumps saveboth time and money. The compaction meter alsohelps to avoid an unnecessary number o runs,which reduces both uel consumption and wearon the machines.

Sensor (accelerometer)A sensor (1) sits on the vibrating part, which continuously regis-

ters the movement o the drum. The signals rom the sensor are

sent to a processor unit (2), where they are processed.

1

Display instrument (CMV instrument) The CMV indicates the rigidity o the compacted material. The

higher the CMV, the more rigid and more compacted the mate-

rial is. When CMV no longer increases during additional runs this

means that maximum compaction has been reached during thepresent conditions.

3

Processor unit The signals rom the sensor (1) are processed in a processor (2)

and presented as CMV (compaction meter value) on the instru-

ment panel (3).

2

ClayRock 

CMV

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Compaction meter and DCA-S

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2

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45

A Dynapac vibratory roller with compaction meter and DCA-S is a

reliable system or the control o compaction, and thereby guarantees

rst-rate quality in your next project. The operator can continuously read the compaction results on

his instrument panel. As opposed to conventional measurement

methods, the compaction meter provides continuous measurement

results and not only random samples as beore.

  The Dynapac Compaction Analyzer registers all the measure-

ment values rom the compaction meter, while at the same timethe operator can see the compaction results immediately on the

computer screen.

Dynapac has developed this unique combination so that the

compaction will be correct rom the very start.

A genuinely protable machine!

Careul compaction o each layer o soil provides a signicant

improvement o the bearing strength o the earth materials. A uniorm

bearing strength in each layer prevents uncontrolled settlements in

the uture.Correctly used, a vibratory roller is the perect machine or

compaction work. I, moreover, you can use the same machine or

compaction control it is an excellent instrument in the compaction

process. It helps you to localize areas where additional compaction

is needed to achieve uniormity and satisactory compaction cha-racteristics.

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The results of the compaction are shown directly on thescreen of the portable DCA unit . The measurement values

can easily be transferred to a desktop computer by means

of a memory card.

5

The Rear axle sensor registers the longitudinal  position.

The compaction meter measures the bearing strength

of the surface in CMV, where CMV stands for Compaction

Meter Value.

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2

The Processor  processes the signals from the accelero-

meter.3

The Drum accelerometer registers the compaction.1

Rock  Clay140

100

120

8060

40

20

CMV

10 20 30 40 50

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A Dynapac vibratory roller with compaction meter and DCA-S

(GPS) is a reliable system or the control o compaction, and thereby

guarantees rst-rate quality in your next project. The operator can continuously read the compaction results on

his instrument panel. As opposed to conventional measurement

methods, the compaction meter provides continuous measurement

results and not only random samples as beore.

  The Dynapac Compaction Analyzer registers all the measure-

ment values rom the compaction meter, while at the same timethe operator can see the compaction results immediately on the

computer screen.

Dynapac has developed this unique combination so that the

compaction will be correct rom the very start.

A genuinely protable machine!

A Dynapac Compaction Analyzer means that:· The compaction energy can be concentrated to the ground suraces

that need additional compaction.· No unnecessary compaction o already nished suraces.· The risk o inerior or exaggerated compaction is eliminated.· Each stage o the compaction work is documented, and high-quality

documentation o the compacted area is obtained immediately.

In other words you now have a much greater opportunity to achieve:

· First-rate compaction results with maximum uniormity in terms othe bearing strength o each layer.

· Simple quality assurance.· More ecient compaction.· The best possible economy or both contractors and purchasers.

Compaction meter and DCA-S (GPS)

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The results of the compaction are shown directly on thescreen of the portable DCA unit . The measurement values

can easily be transferred to a desktop computer by means

of a memory card.

5

The Rear axle sensor registers the longitudinal  position.

The compaction meter measures the bearing strength

of the surface in CMV, where CMV stands for Compaction

Meter Value.

4

2

The Processor  processes the signals from the acceler-

ometer.3

The Drum accelerometer registers the compaction.1

The roller is in contact with a positioning system via theGPS aerial on the roof, which explains exactly where

the machine is.

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140

100

120

80

60

40

20

Rock 

Clay

CMV

10 20 30 40 7050 60

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Dynapac Compaction Equipment AB, Box 504, SE-371 23 Karlskrona, Sweden. Tel: +46 455 30 60 00, Fax: +46 455 30 60 30

We reserve the right to change specications without notice. Photos and illustrations do not always show standard versions of machines.The above information is a general description only, is not guaranteed and contains no warranties of any kind.

Locations worldwide

For other countries, please check www.dynapac.com or send an e-mail to [email protected]

 AustrAliA Dynapac Australia Pty. Ltd.132 Toongabbie Road. GIRRAWEEN NSW 2145. Phone: +61 2 88689700. Fax: +61 2 97691024 • AustriA Dynapac / Büro Österreich. Feldstrasse 34, 2345 BRUNN AM GEBIRGE. Phone: +43 2236 37992244. Fax: +43 37992299 • BrAzil Dy-

napac Brasil Indústria e Comércio Ltda. Rua Flórida, 1738, 6° andar. Brooklin Novo, 04565-001, SÃO PAULO. Phone: +55 11 3797-2151. Fax: +55

11 3797-2172 • CAnAdA Dynapac Canada Ltd. 4170 Sladeview Crescent, Unit 3, MISSISSAUGA, Ontario, L5L0A1. Phone: +1 905 607 1170. Fax:

+1 905 607 7921 • ChinA Dynapac China Room 401, CYTS Plaza, No.5, Dongzhimen South Avenue, Dongcheng District, BEIJING 100007 Tel: +86

10 5815 6400. Fax: +86 10 5815 6468 • FrAnCe Dynapac France SNC BP 50048 77222 TOURNAN-EN-BRIE CEDEX Phone: +33 (0)1 64 42 59

00 Fax: +33 (0)1 64 07 11 57 • GermAny Dynapac GmbH Im Tiefenbruch 7 DE-31275 LEHRTE Phone: +49 5132 8287-0 Fax: +49 5132 8287-76 •

indiA Dynapac India Pvt. Ltd. 808, Ansal Bhawan 16, Kasturba Gandhi Marg NEW DELHI - 110 001 Phone: +91 11 5152 0851/52 Fax: +91 11

5152 0853 • itAly Dynapac S.p.A. Via Galileo Galilei 41 IT-20010 CORNAREDO (MI) Phone: +39 02 934831 Fax: +39 02 93483199 • mexiCo  

Dynapac Mexico S.de R.L. de C.V. Oso 127 - 405 Col. Del Valle Mexico D.F. 03100 Phone: +52 55 5534 5103 Fax: +52 55 5524 7779 • norwAy Dyna-

pac Norway AS Professor Birkelands vei 36 D pb 23 Alnabru, N 0614 OSLO Phone: +47 40 45 51 00 Fax: ++47 22 90 35 52 • PolAnd Dynapac Poland

Sp. z o.o. ul. Rzepakowa 1A 40-541 KATOWICE Phone: +48 32 78 27 100 Fax: +48 32 78 27 101 • russiA Dynapac CIS 104, Bld. 14, Oktyabrskaya

Emb. RU-193079 ST. PETERSBURG Phone: +7 812 336 94 00 Fax: +7 812 336 94 01 • south AFriCA Dynapac (SA) (Pty) Ltd 64 Kelly Road Jet

Park, JOHANNESBURG, 1459 Phone: +27 11 397-8380 Fax: +27 11 397-8389 • sPAin Dynapac Iberia, S.L.U. Rivas No. 4 ES-28032 MADRID Phone:

+34 902 013 254 Fax: +34 91 825 57 15 • sweden Dynapac Nordic AB Saldovägen 20 SE-175 62 JÄRFÄLLA Phone:+46 8 474 21 00 Fax: +46 8 474

21 10 • united KinGdom  Dynapac Ltd Unit 4B Consul Road RUGBY, Warwickshire CV21 1QJ Phone: +44 1788 53 5030 Fax: +44 1788 53 5090 •

usA Dynapac Compaction, Paving & Milling Inc. P.O. Box 615 SCHERTZ, TX 78154 Phone: +1 210 474 5770 Fax: +1 210 474 5750

· Continuous measuring o the rigidity o the underlying surace.

· Warns the operator o double jumping/overcompaction.

· Two measurement scales, CMV 0-50 or ne-grained material and CMV 0-150 or the rest.

Functions o DCA-S

In addition to the unctions o the Compaction Meter:

· Continuous registering o measured values.

· Calibration to Ev2 ETC.

· Search unction to localize the weakest areas or acceptance inspection.

· Graphic presentation o the compaction results during the compaction work.

· Integrated analysis unction.

· Printout unction.

Functions o DCA-S (GPS)

In addition to the unction o the compaction meter and DCA-S:

· Integrated conversion o WGS84 coordinates to local coordinate system.

· Absolute positioning o measured values in local coordinate system.

· A digital road line model provides the roller operator with inormation on the current position (section/lateral measurement).

Compaction meters DCA-S and DCA-S (GPS) are installed in the ollowing machines (actory ftted or post-actory ftted)

· CA 150/250/260/280 (compaction meter only)

· CA 152–702

Dynapac Compaction Analyzer

Functions o the Compaction Meter