Research on the stability of diaphragm walls subjected to earthquake using pseudo-static method

The effects of the water table, the ultimate pullout force of the rockbolt, the soil friction angle, and the penetration depth of the diaphragm wall on the stability of the wall under seismic conditions were investigated. The earth pressure, the groundwater pressure and the inertial force of the wall were calculated using "general wedge earthquake analysis". The pseudo-static method was used for analyzing the stability of the wall from the perspective of the safety factors against overturning and sliding. The calculated results show that the stability of the diaphragm wall decreases as the horizontal seismic acceleration coefficient increases;the water table on the non-excavation side, the soil friction angle, the ultimate pullout force of the rockbolt, and the penetration depth of the diaphragm wall play an important role on the stability;moreover, the soil friction angle has greater effect on the safety factor against sliding than on the safety factor against overturning, but the ultimate pullout force of the rockbolt has greater effect on the safety factor against overturning than on the safety factor against sliding.