Innovative technique for road slope stabilisation

Abstract

The paper describes an innovative method for stabilisation and greening of newly formed road slopes. Meandrically arranged thick ropes made from textile waste covered with soil mixed with randomly distributed wool and polyester fibres were applied for stabilisation. The ropes were installed on the slope in autumn. Hydroseeding was performed the following spring. Behaviour of the slope during several months was regularly monitored. In the first period – during autumn and winter – the ropes in combination with fibre-reinforced soil reduced the danger of local landslides and soil erosion. After hydroseeding the system provided water supply needed for seed germination. During grass growth the fertilising effect of nitrogen compounds released as a result of wool biodegradation was revealed. Finally, a stable slope covered with high grass grown in a relatively short time was achieved.