TY - JOUR
ID - 4532
TI - Numerical investigation of the static behavior of stepped soil nail walls
JO - Scientia Iranica
JA - SCI
LA - en
SN - 1026-3098
AU - Ahmadi, Mohammad Mehdi
AU - Borghei, Amin
AD - Department of Civil Engineering, Sharif University of Technology, Tehran, Iran
AD - Department of Civil and Environmental Engineering, University of New Hampshire, United States
Y1 - 2018
PY - 2018
VL - 25
IS - 1
SP - 140
EP - 151
KW - Soil Nailing, Optimal step depth
KW - Minimum step width
KW - Deep excavation, Numerical analysis
DO - 10.24200/sci.2017.4532
N2 - This paper presents a numerical investigation on the static behavior of stepped soil nail walls constructed in dry sandy soils. The finite element method was used to study influence of wall geometry and soil parameters on behavior of the walls. We analyzed walls with heights of 10, 15, and 20 m .This study shows that the wall deformation and the nail tensile forces of the stepped soil nail wall are smaller than those of the typical soil nail wall. If properties of soils such as friction angle, cohesion, and elastic modulus decrease, these will result in more decrease in the wall lateral displacement and nail tensile forces of a stepped soil nail wall. Therefore, stepped soil nail walls are more effective in soft soils than hard soils. When a step is located at the middle of the wall height, the wall lateral displacement and nail tensile forces are minimized; hence, the ratio of the optimal step depth to the wall height is 0.5. As the step width increases, the wall deformation and nail forces decrease. Numerical analysis demonstrates that the minimum step width is approximately 0.1 times of the wall height.
UR - http://scientiairanica.sharif.edu/article_4532.html
L1 - http://scientiairanica.sharif.edu/article_4532_e4657fc75b3f51c05cf366c01eb89c4f.pdf
ER -