Akademik Veri Yönetim Sistemi
1. Ulusal Genç Geoteknik Mühendisleri Sempozyumu, Erzurum, Türkiye, 12 Ekim 2016, ss.59-68
Vertical shaft excavations have been widely used in engineering applications such as metro
systems, mines, pumping stations, bridge pier foundations, etc. for temporary and
permanent retaining structures. Calculations of earth pressure acting on the shaft wall are
generally calculated by classical earth pressure theories because of the simplicity and
common-usage. Because the theories were developed for infinite walls under plane stress
conditions, these theories usually calculate high pressure values for shaft excavations.
Hence, conical collapse surface determination should be used in order to define lateral
earth pressures along with plastic equilibrium for circular or elliptical shafts. Because of
the complexity of these solutions, engineers mostly use commercial software packages
developed for numerical analysis methods. While numerical methods provide more
favorable results than plastic equilibrium methods based on equilibrium, cotinuity, material
constitutive behavior and boundary conditions, unrealistic solutions may obtain unless they
use consciously. In this study, aimed to present factors affecting earth pressures on vertical
retaining wall members of circular shafts. To achieve this, numerical analyses performed
for different strength parameters, wall and soil stiffness. Moreover, the earth pressure
results obtained from analyses are compared to classic earth pressure theories. In
conclusion, It is determined in numerical analyses that wall stiffness is an important factor
and affects earth pressure distribution on shafts significantly.