|
Abstract
|
In this study, excavation walls stablized by both grouted nail and a new type of screw nail
with helix plates and treaded shaft were modelled and the results were compared. The
effects of surcharge load and wall height on the screw and grouted nails performance were
investigated. The results showed that the settlement profile of the ground surface within the
excavated wall has the same shape for different values of slope height, and consists of two
main parts, critical and non-critical parts. The length of the critical zone is 0.60-0.7 times
of the slope height and the rate of changes of the surface settlement in critical part is
greater than the other one. The rate of increase of surface settlement and the maximum
settlement of the ground surface at the edge of the reinforced wall by screw nails and
grouted nails have the same values in clayey soils. There is not significant difference in
safety factor of slope and the vertical and horizontal displacemens of the reinforced wall by
screw and grouted nails in clayey soils. It can be concluded that, there is not considerable
difference between the performance of the screw and grouted nails in clayey soils.
|