Interface Shear/Stability

Soil veneer sliding on steep side slopes is of particular concern for traditional soil covers, particularly after major storm events. With this concern in mind, Watershed Geosynthetics engineered ClosureTurf®.

Interface shear strength testing of ClosureTurf® indicates Phi values of 43 degrees (peak) and 38 degrees (large deformation). Using the equation of tan φ/tan α, the interface stability factor of safety can be calculated for a given slope. Factors of Safety for a range of slopes are presented in the Table.

Interface shear strength testing of ClosureTurf®

Interface shear strength testing of ClosureTurf®

Factors of Safety for a Range of Slopes

Factors of Safety for a Range of Slopes

Also, rainfall penetrates quickly through the sand infill and engineered turf. It infiltrates directly into the integrated drainage layer below the engineered turf, avoiding sand erosion and maintaining sand infill stability. The infill, held in place by the engineered turfʼs unique structure, provides ballast which adds even more stability to the system.

The transmissivity of ClosureTurf® is presented in the Figure.

Hydraulic Transmissivity Testing of ClosureTurf™

Hydraulic Transmissivity Testing of ClosureTurf®