The influence of soil slip on negative skin friction in pile groups connected to a cap

There have been several investigations into the behaviour of isolated piles in groups subject to negative skin friction (NSF), from experimental observations and theoretical studies (Shibata et al., 1982; Jeong et al., 2004; Lee & Ng, 2004). However, to date, the behaviour of piles in groups connected to a cap in consolidating soil has attracted less attention among engineers than the study of isolated piles in groups. There is only a limited number of relevant case histories on the behaviour of piles connected to a cap (Chellis, 1961; Garlanger & Lambe, 1973...