Compaction Redefined
With a Seismic Soil machine you benefit from, increased productivity, energy and cost efficiency as well as operator comfort and simplicity. The Patented Seismic innovation by Dynapac is unique and is the only system on the market that is completely automatic with no need for additional operator training.
Excellent Operator Comfort
The machine operates at a lower noise level and transmits fewer vibrations to the cab, thanks to reduced frequency levels. This results in a more pleasant experience for the operator, allowing you to enjoy your workday in a quieter, smoother, and more comfortable cab.
Select and go
Starting a machine with Seismic is incredibly simple, as Seismic is automatically activated by default. Just pick high or low amplitude. That’s it. You’re ready to roll.
Thanks to lower frequency vibrations, the improvement is evident both inside the cab and in the area around the machine. You get a calmer, more comfortable workspace that enhances both focus and overall operator well-being.
Seismic Soil
How the System Works
The system provides real-time monitoring and continuously adjusts the frequency automatically based on the material. No additional training is required and no risk of getting the compaction settings wrong. By working in harmony with the material being compacted, it significantly reduces issues like bouncing and aggregate crushing. This fully automatic compaction process eliminates operator guesswork, ensuring optimal performance for any material or layer thickness.
Reduces Wear and Tear
Thanks to Seismic and the optimised frequency adjustments, the vibration powertrain and drum shell are exposed to less stress and wear compared to conventional compaction. This, in turn, means a longer life of the vibration mechanism and related hydraulics. On top of this, Dynapac's already durable and thick drum shells will last even longer, maximising the drum lifetime.
Marked components benefit from extended lifetime enabled by Seismic Soil:
Scientifically Proven
With Seismic Soil, operators can reduce the number of compaction passes by up to 30%, delivering faster results with lower fuel use and reduced operating costs.
These benefits are backed by repeated testing, including studies from KTH Royal Institute of Technology and VTI (Swedish National Road and Transport Research Institute), which confirm that Seismic Soil technology increases compaction efficiency while also lowering environmental impact.
Seismic Delivers More
EcoMode
With the EcoMode setting enabled, the machine operates at the lowest possible RPM without compromising compaction quality. The machine automatically idles after 10 seconds in neutral, significantly reducing engine RPM. This feature does not interfere with the general workflow or operation of the machine and ensures instant start-up after idle mode.
Compaction Meter
The Dynapac Compaction Meter provides real time stiffness measurements to ensure optimal compaction. The compaction meter can present three unique values for the operator, CMV, EVIB1 and EVIB2. Seismic Soil uses the Compaction Meter Sensors to calculate the frequency adjustment.
Active Bouncing Control
When the soil becomes highly compacted, it can no longer absorb additional energy, leading to harmful bouncing. The system operates by first alerting the operator when bouncing is detected. Subsequently, the machine automatically disables vibrations and notifies the operator to reduce the amplitude, ultimately resulting in the cessation of vibrations.
FAQ
Seismic is the innovation that lets the roller determine the optimum frequency for any compacted material, monitoring the variations and constantly adjusting to the changing conditions automatically.
The Seismic Soil is very useful to us in the compaction process and will give several advantages:
• Lifetime fuel consumption reduction by up to 55% with EcoMode engaged
• Lower noise levels thanks to a lower vibration frequency
• Possibility to omit final static passes
• Possible reduction of the number of compaction passes (depending on application). If possible, total fuel savings (reduction of passes with 30%, EcoMode and Seismic) might reduce the fuel consumption with up to 55%
• Lower machine wear (increased lifetime)
CA1500-6500 except Dual Speed machines and IIIA variants of CA2500/3.3, CA2800 and CA3600.
In addition to the decals on the engine hood and front/rear of the cab/ROPS, it will be shown in the machine’s display. Seismic is set as default but can be turned off using the adjustable frequency button. The Dynapac Compaction Meter with Evib (DCM Evib) is standard so the accelerometer in the drum is mounted along with the eccentric position sensor.
No, we offer Seismic only as a factory installed option.
Seismic Soil with Active Bouncing Control (ABC) is a Dynapac Patent since 2021.
Up to 55% in combination with EcoMode.
Yes, both laboratory tests together with Royal Institute of Technology (KTH) in Sweden and field tested together with Trafikverket for the Swedish high-speed railway foundations. Several reports can be distributed upon request. Over the seven years we have delivered Seismic machines, we only received positive feedback on performance and savings.
Thanks to Seismic Soil, the operator no longer needs to manually set the frequency or guess what soil type or frequency should be used at any given time. As usual the operator must select the correct amplitude in relation to the material layer thickness. Using the pre-set on the speed limiter, constant speed and optimal compaction is ensured, thus allowing the operator to focus on meeting the compaction requirements. Dynapac’s well-renowned tools such as Dynapac Compaction Meter and DynaLyzer ensure that these requirements are met.
No, we are using the same proven mechanical components we have used for several years. The Seismic system is algorithm based adding no extra complexity or service need to the roller.
Conventional vibratory compactors deliver a rapid succession of impacts to the soil surface at a frequency that is either pre-set at high or low amplitude or at a frequency that is adjusted manually. Normally around 30-33 Hz (1800 vpm–1980 vpm). Dynapac Seismic does it differently. Since the drum and the soil act as one dynamic system, several benefits can be found from this system’s natural frequency. At the natural frequency, the drum amplitude is enhanced significantly, since energy is automatically fed to the system at exactly the right time. This, in turn, maximizes the contact force between the drum and the ground, yielding maximized compaction and energy efficiency. Now we are in the range of 20 Hz (1200 vpm) and up depending on soil type and stiffness achieved.
The possibility to adjust the frequency manually has been present for quite some time, most rollers have been operated at fixed frequencies between 28 to 40 Hz (1,680–2,400 vpm). Recognizing the dynamic characteristics of a certain soil is not possible, these characteristics also change as the compaction state of the soil changes. With Dynapac Seismic, the roller automatically determines the natural frequency of the soil and adjusts to it. This saves both time and fuel, reduces the environmental impact and reduces the wear of the machine.
Yes, look here for more information
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