Surcharge loading rate for minimizing lateral displacement of PVD improved deposit with vacuum pressure

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• 作者：Jinchun Chai ; ^{chai@cc.saga-u.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; Steeva Gaily Rondonuwu ^{12634008@edu.cc.saga-u.ac.jp" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Preloading ; Consolidation ; Vacuum pressure ; Lateral displacement ; Loading rate
• 刊名：Geotextiles and Geomembranes
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：43
• 期：6
• 页码：558-566
• 全文大小：1414 K

文摘

A series of laboratory radial drainage odometer and triaxial tests were conducted to investigate the deformation behaviour of clayey soils under combined vacuum pressure and surcharge loads. Based on the test results, a method for determining the optimum surcharge loading rate (SLR) which will result in minimum lateral displacement of a deposit under combined loads has been proposed. The method using a dimensionless parameter, 伪, defined as the ratio of SLR and the parameters controlling the rate of consolidation of a deposit improved by prefabricated vertical drains (PVDs). The ratio between surcharge load (螖蟽_s) to the vacuum pressure (螖蟽_vac) is designated as 5001156&_mathId=si1.gif&_user=111111111&_pii=S0266114415001156&_rdoc=1&_issn=02661144&md5=363b54306c568f7d7354e74f966eae15" title="Click to view the MathML source">(LR=螖蟽_s/|螖蟽_vac|)$\left(LR=螖{蟽}_s/\left|螖{蟽}_{vac}\right|\right)$. Values for the optimum SLR increase with increasing of initial effective stress in the soil and with reducing LR. It is suggested that the method can be used for design the preloading project with combined vacuum and surcharge loads.