Selection of mechanisms for soil compaction.
Soil compaction work in the pits are implemented in two steps:
– soil compaction between the columns foundations;
– over the columns foundations.
Depending on the lack of space of works performance conditions, can be used:
-motor rollers with smooth rolls – for cohesive soil;
-vibroroller– for non–cohesive soils;
-hydraulic–mechanical vibratory compactors – for all soils;
-electrical self–moving vibrating rammer – for non–cohesive and lowly cohesive soils;
-electrical rammer – for cohesive and non–cohesive soils.
Shift operating performance of rollers is calculated by the formula:
𝑃 = (𝐵 − 𝑏) ∙ 𝜈 ∙ 1000 ∙ ℎ ∙ 𝑇 0,85
𝑠ℎ.𝑜. 𝑚
where, 𝐵– width of compaction line (annex. №1. table. 4);
𝑏 – width of overlap of adjacent lines (0,1–0,2 m);
𝜈 – average speed (4–6 km / h);
ℎ – width of the condensed layer, m (annex. №1. table. 4);
m– required number of blows or passes (8…10).
The composition of the machines included in the set to be determined by
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