OPERABILITY OF GEOTEXTILE PROTECTIVE FILTERING MATERIALS OF THE DRAINAGE

Abstract

Data on studying of influence of term of operation of drainage systems on filtrational characteristics protective filteringmaterials are provided. Meliorative systems with drainage corrugated pipes and the geotextile protective Typar SF 27 filter are picked up. The term of operation of a drainage from 2 to 8 years. Drainage excavation is carried out, technical condition of pipes and filters is filled. The zaokhrivaniye of pipes and filtering materials is noted. Laboratory researches of filtrational characteristics of geotextile materials and water reception ability of pipes with samples of ZFM which were in operation are conducted. It is established that coefficients of a filtration of samples of the geotextile material Typar SF 27 from various objects at operation term from 2 to 8 years decrease on the average by 40 - 60% in comparison with the new. Water reception ability decreased by 20 - 30%.