泥封法水下真空预压室内模型试验及数值模拟  

Indoor model experimental research and numerical simulation of underwater vacuum preloading with clay-sealing method

作　　者：闫澍旺[1,2] 李亚奇[1,2] 林澍 闫玥[1,2] 朱福明[3] 纪玉诚[1,2] YAN Shu-wang;LI Ya-qi;LIN Shu;YAN Yue;ZHU Fu-ming;JI Yu-cheng(State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;School of Civil Engineering, Tianjin University, Tianjin 300072, China;Tianjin Port Construction Co., Ltd., Tianjin 300452, China)

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072 [2]天津大学建筑工程学院,天津300072 [3]天津港建设公司,天津300452

出　　处：《中国港湾建设》2017年第9期5-10,共6页China Harbour Engineering

基　　金：国家自然科学基金项目(41272323;41372291);天津市自然科学基金重点项目(13JCZDJC35300)

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。The existing underwater vacuum preloading technology,which is suitable for the soft soil foundation reinforcementin intertidal zone,is an incomplete underwater vacuum preloading.Considering the problems of underwater sealing for fullwaters,we put forwoard clay-sealing method to substitute the plastic membrane sealing method to seal for underwater vacuumpreloading,performed indoor model test to investigate the method.Through the analysis on changes of soil settlement,strengthincrease and water content,we verified the feasibility of the clay-sealing method,and put forward several methods to enhancethe effect of vacuum preloading.We carried out numerical simulations to study the calculation method of underwater vacuumpreloading 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 engineeringprojects based on the discussion.

关 键 词：全水域 软黏土 水下真空预压 泥封法 数值模拟 

分 类 号：U655.544.4[交通运输工程—港口、海岸及近海工程] TU43[交通运输工程—船舶与海洋工程]