日本語フィールド
著者：柴 錦春, J.-C., Carter, J. P. and Liu, M. D 読み: チャイ ジン チュン, J.-C., Carter, J. P. and Liu, M. D題名：
現場での真空圧密方法と地盤変形解析発表情報：Ground Improvement, Proceedings of Institute of Civil Engineer, UK. 巻: 167 号: 1 ページ: 35-46キーワード：
真空圧密、変形解析概要：抄録：Two methods, namely the air-tight sheet method and the vacuum-drain method (sheetless), are generally used to conduct vacuum consolidation in the field. The advantages and disadvantages of both methods and the techniques for preventing vacuum leakage through a middle sand layer in a deposit, as well as the method for maintaining vacuum pressure when large settlement occurs, have been described. Vacuum pressure is an isotropic consolidation pressure applied to a soil deposit, and the deformation induced is different from that induced by a surcharge (e.g., the weight of an embankment). Two typical case histories in Japan are presented and deformation analyses were conducted. In one case history the vacuum-drain method was used with vacuum pressure alone, and in the other a combination of embankment loading and vacuum pressure was applied employing the air-tight sheet method. It is shown that under vacuum pressure loading, the ground deformation (settlement and lateral displacement) can be calculated reliably using the method proposed by Chai et al. in 2005. For the case involving a combination of vacuum pressure and embankment load, the settlements under the embankment centreline can be estimated reasonably assuming one-dimensional (1D) deformation conditions.英語フィールド
Author：Chai, J.-C., Carter, J. P. and Liu, M. DTitle：
Methods of vacuum consolidation and their deformation analyses.Announcement information:Ground Improvement, Proceedings of Institute of Civil Engineer, UK. Vol: 167 Issue: 1 Page: 35-46Keyword：
Vacuum consolidation, deformation analysisAn abstract：Two methods, namely the air-tight sheet method and the vacuum-drain method (sheetless), are generally used to conduct vacuum consolidation in the field. The advantages and disadvantages of both methods and the techniques for preventing vacuum leakage through a middle sand layer in a deposit, as well as the method for maintaining vacuum pressure when large settlement occurs, have been described. Vacuum pressure is an isotropic consolidation pressure applied to a soil deposit, and the deformation induced is different from that induced by a surcharge (e.g., the weight of an embankment). Two typical case histories in Japan are presented and deformation analyses were conducted. In one case history the vacuum-drain method was used with vacuum pressure alone, and in the other a combination of embankment loading and vacuum pressure was applied employing the air-tight sheet method. It is shown that under vacuum pressure loading, the ground deformation (settlement and lateral displacement) can be calculated reliably using the method proposed by Chai et al. in 2005. For the case involving a combination of vacuum pressure and embankment load, the settlements under the embankment centreline can be estimated reasonably assuming one-dimensional (1D) deformation conditions.