%0 Journal Article
%A HU Zhi-feng
%A CHEN Jian
%A QIU Yue-feng
%A LI Jian-bin
%T A Simplified Method for Predicting Ground Surface Settlement Induced by Deep Excavation of Clay Stratum
%D 2019
%R 10.11988/ckyyb.20171282
%J Journal of Yangtze River Scientific Research Institute
%P 60-67
%V 36
%N 6
%X Horizontal displacement of retaining structure is the main cause of ground surface settlement in deep excavation. In this paper we propose a method of estimating the ground surface settlement. First of all we assume that the ground surface settlement curve is a Gaussian probability density function, and derived the analytical formula of ground settlement under different lateral deformation modes of retaining wall based on linear elastic theory. Subsequently we acquired the location <i>x</i><sub>m</sub> of maximum settlement (which is defined as the distance <i>x</i><sub>m</sub> from the location of maximum settlement to foundation pit edge) in clay stratum based on the analytical formula, and then calculated the settlement-influenced range <i>x</i><sub>0</sub> based on the aforementioned assumed function of ground settlement in association with soil loss theory. Furthermore, we derived the area <i>A</i><sub>v</sub> enveloped by the ground settlement curve, and in the meantime obtained the maximum ground settlement <i>δ</i><sub>max</sub> according to the relation between <i>A</i><sub>v</sub> and <i>A</i><sub>h</sub>, which is the area enveloped by the lateral displacement curve of retaining wall. The ground settlement of arbitrary location behind retaining wall hence can be estimated by substituting  <i>δ</i><sub>max</sub>  in the aforementioned assumed function. Through several engineering cases we proved that the proposed method is applicable, and thus providing a semi-theoretical and semi-empirical approach to predicting ground surface settlement.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20171282