DRS260D — уплотнение гравийной насыпи

Preface: Difficulties of Gravel Subgrade Compaction

Gravel and macadam embankment is the core bearing layer of highways, dams and industrial yards. Conventional medium rollers often fail to reach target compaction density on thick gravel lifts, leading to post-construction settlement and pavement cracking. The Redline DRS 260D heavy single-drum roller, a 26.2-ton dual-drive compactor from Dynapac Redline series, provides a mature full-set construction solution for large-scale gravel subgrade compaction projects globally. This case shares standardized rolling procedures and machine advantages applied on a highway gravel embankment project.

Core Machine Advantages for Gravel Compaction

The DRS 260D heavy-duty compactor is tailor-made for heavy earth and gravel filling works.

• Its front-rear weight ratio reaches 2:1, delivering up to 790 N/cm static linear load, which forces coarse gravel particles to interlock tightly without loose voids.

• Equipped with dual vibration modes (2.0 mm high amplitude / 1.3 mm low amplitude) at 29/31 Hz frequency, it matches thick gravel base and thin finishing lifts separately.

• The Cummins 162 kW water-cooled engine and full hydraulic dual drive system bring 45% maximum gradeability, allowing stable climbing on steep gravel embankment slopes without wheel slipping.

• Large 2130 mm smooth steel drum covers wide area per pass to boost daily construction output.

• Besides, the ROPS air-suspension cab with panoramic windows ensures precise edge rolling along embankment shoulders, while factory-accessible service points cut daily maintenance downtime on remote job sites.

Standard Gravel Embankment Construction Flow with DRS 260D

▸Step 1:  Base Preparation & Material Control

Clear organic soil and soft mud from the raw subgrade, level the ground and inspect gravel grading and moisture content to stay within optimal range. Spread gravel mixture with motor graders, controlling loose lift thickness under 300 mm to fit the DRS 260D’s deep compaction capacity. Reserve 300 mm extra width on both sides of the embankment for full edge compaction.

▸Step 2:  Initial Static Stabilization

Operate the roller at low travel speed (2–4 km/h) with vibration off for 2 full forward-reverse passes.  Total weight of the machine flattens protruding large stones and eliminates loose surface segregation, preventing steel drum jumping during subsequent vibratory rolling. Follow the rule “roll from embankment edge to center” with 200–300 mm overlap between adjacent tracks.

▸Step 3:  Main Heavy Vibration Compaction

Switch to high-amplitude 2.0 mm vibration mode, complete 4–6 rolling passes. Powerful 410 kN excitation force penetrates the full gravel layer, squeezing fine filler into gaps between coarse aggregates to hit design compaction degree over 95%. For steep slope sections, reduce travel speed and extend overlapping width to avoid incomplete slope compaction.

▸Step 4:  Low-Amplitude Finishing Rolling

Turn to 1.3 mm low amplitude vibration for 1–2 finishing passes, removing obvious wheel marks and homogenizing surface density. The balanced weight distribution of DRS 260D vibratory roller avoids over-compaction on surface gravel which causes particle crushing.

▸Step 5:  Inspection & Supplementary Compaction

Detect compaction density at regular intervals. If weak zones exist, conduct supplementary vibration rolling with the DRS 260D; narrow trench corners unreachable by this heavy roller can be finished with small compactors as auxiliary equipment.

On-Site Construction Effect & Cost Benefits

Compared with 20-ton single-drum rollers used on previous similar projects, the Redline DRS 260D dual-drive compactor cuts required rolling passes by 20% for identical gravel lifts. Its high excitation force shortens each construction section’s working cycle, raising daily earthwork throughput by nearly 30%. The integrated Redline telematics system remotely monitors machine running hours, fuel consumption and fault data, helping contractors arrange maintenance plans reasonably to extend roller service life. The universal Cummins spare parts supply network worldwide also lowers long-term fleet operation costs for global road builders.

Applicable Global Scenarios

Beyond highway gravel subgrade, this DRS 260D heavy single-drum roller fits dam embankment filling, landfill soil compaction, port yard ground treatment and large industrial park foundation projects. It is the preferred heavy compaction equipment for all large-scale granular fill construction requiring high bearing capacity and long-term structural stability.