Experimental compaction of cohesive soils at the Nurek, Toktogul, and Charvak dams using pneumatic-tired rollers: Fid-Bau Portal

Experimental compaction of cohesive soils at the Nurek, Toktogul, and Charvak dams using pneumatic-tired rollers

Korsuntsev, V. I.

Conclusions Compaction with the D-326 roller gives best results with respect to the density and layer thickness.If the D-326 roller is used the optimum moisture content may be taken as 15–16% for the silty soils studied during the investigations. The magnitude of the optimum moisture content, determined by standard laboratory tests, does not differ appreciably from the values obtained under field conditions for the D-326 roller. In the case of the D-263 and D-551 rollers the optimum moisture content is 1–1.5% higher.While compacting with the D-326 roller a maximum density of 1.75–1.80 g/$ cm^{3} $ may be attained if the layer thickness is reduced (∼20 cm) and requirements regarding the optimum moisture conditions are satisfactorily fulfilled throughout the rolling process. Consolidation tests indicate that the dam foundations will attain a density of 1.85–2.0 g/$ cm^{3} $. The position may be further clarified by using more effective, heavier rolling equipment weighing 70–100 tons (with higher wheelloads, tire pressures, tire dimensions etc). This appears to be the most promising method for compacting soil to the desired density immediately while placing it in the core.