【摘要】 现有的水下真空预压技术主要适用于潮间带的软基加固,并非完全意义上的水下真空预压。针对全水域水下密封存在的问题,文章提出用泥封法代替传统铺膜方法进行水下真空预压的密封,通过室内模型试验对泥封法水下真空预压进行了研究,通过对土体沉降、强度增长和含水率变化的分析,验证了泥封法的可行性,并提出几种增强真空预压加固效果的方法。结合数值模拟进行了泥封法水下真空预压的计算方法研究,并探究上覆水荷载对于真空预压效果的影响。最后,对泥封法水下真空预压技术在工程中的运用方法进行了讨论并提出一定的建议。更多还原

【Abstract】 The existing underwater vacuum preloading technology,which is suitable for the soft soil foundation reinforcement in intertidal zone,is an incomplete underwater vacuum preloading.Considering the problems of underwater sealing for full waters,we put forwoard clay-sealing method to substitute the plastic membrane sealing method to seal for underwater vacuum preloading,performed indoor model test to investigate the method.Through the analysis on changes of soil settlement,strength increase and water content,we verified the feasibility of the clay-sealing method,and put forward several methods to enhance the effect of vacuum preloading.We carried out numerical simulations to study the calculation method of underwater vacuum preloading with clay-sealing method,and investigated the influence of overlying water load on vacuum preloading.Moreover,some advices are given to the application of the underwater vacuum preloading with clay-sealing method in engineering projects based on the discussion.更多还原