EVALUATION OF THE SEISMIC PERFORMANCE （抗震性能的评估）.pdfVIP

EVALUATION OF THE SEISMIC PERFORMANCE OF DUAL ANCHORED SHEET PILE WALL Shunichi Higuchi, Kenichi Miki Yasushi Nakamura OBAYASHI Co., Japan Yoshiyuki Morikawa Takahiro Sugano Port and Airport Research Institute, Japan Yoshiaki Kikuchi Tokyo University of Science, Japan Masami Hoshino Japan Port Consultants, Ltd., Japan Kazuhiro Higashiyama Tohoku Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism., Japan SUMMARY: The dual anchored sheet pile wall method has been developed for the purpose of increasing a front water depth and improvement of seismic resistance of existing quay walls by providing additional anchors in the lower level of them to reduce a flexural moment of the sheet piles and a tension of the anchors. The authors firstly conducted the centrifuge experiments with a scale model to investigate the seismic behaviour of the dual anchored sheet pile wall. Then, the two dimensional effective stress analyses were conducted to investigate the applicability on evaluating the seismic performance of the dual anchored sheet pile wall prior to the actual application. Keywords: Seismic retrofit, quay wall, centrifuge, effective stress analysis 1. INTRODUCTION Recently, demand of increasing a front water depth of existing quay-walls due to increasing size of cargo ships or from the view point of reservation of marine transportation during post earthquake disaster restoration in Japan, the dual anchored sheet pile wall method (DASPW method, here after) has been developed. Although there are several existing reinforcement methods such as additional piles or soil improvement of backfill for seismic retrofitting of quay-walls, construction works affect regular function, such as cargo handling and storage capability, of quays and aprons. Under Ground Efficient Tie-rod System (Figure 1.1, UGETS, here after), developed by the joint researc