ABSTRACT
Regarding the effect of pressurized grouting on pullout resistance in a ground anchor, Hobst & Zajic (1983) carried out laboratory pullout tests on the ground anchor and showed a significant increase in pullout resistance due to the pressurized grouting. Kleyner et al. (1993) discussed the effect of grout pressure on the capacity of bore-injected piles and anchors. Recently, Yin et al. (2008) investigated the increase of pullout resistance in a soil nailing system caused by pressurized
2 THEORIES UTILIZED FOR PRESSURIZED GROUTING
2.1 Cavity expansion theory
In this study, the cavity expansion theory based on the equations of elasto-plastic analysis by Yu & Houlsby (1991) is modified to be more suitable for analyzing the pressurized grouting.
