排水管扁瘪状态下吹填淤泥排水固结效果研究  

Study on Drainage Consolidation Effect of Hydraulic Filled Mud with the Drainage Tube in Flat and Deflated Condition

作　　者：唐彤芝[1] 盛东升[1] 黄家青[1] 吴月龙 

机构地区：[1]南京水利科学研究院,江苏南京210029 [2]南京瑞迪建设科技有限公司,江苏南京210029

出　　处：《施工技术》2013年第19期75-79,84,共6页Construction Technology

基　　金：水利部科技推广项目(S310002);中央级公益性科研院所基本科研业务费专项资金重点项目(Y30703)

摘　　要：对无砂垫层真空预压法在局部排水管扁瘪状态下淤泥土体的固结变形性状和处理效果进行了研究，表明真空预压过程中淤泥土体的固结变形符合基本规律，预压3～4个月后土体平均压缩率达到23．3％，平均固结度达到89％，物理力学性质指标得到显著改善，地基承载力特征值达到55～65kPa，满足设计要求。局部排水管扁瘪对真空度的深层传递和土体深层排水固结有一定的不利影响，但对吹填淤泥的加固效果无根本性影响。The consolidation, deformation and treatment efficiency of hydraulic filled mud foundation which is treated by vacuum preloading without sand cushion and partial drainage tubes to be sucked flat and deflated is studied in this paper. It shows that the deformation and consolidation of mud comply with the law in the process of vacuum preloading, after preloaded for 3 - 4 months, the average compression ratio achieved 23.3% , average consolidation reached 89% , physical and mechanical properties of mud were improved significantly, characteristic value of subgrade bearing capacity reached 55 -65kPa which can meet the design requirements. The fiat and deflated condition of partial drainage tubes impose a certain negative impact on vacuum transfer with depth and the consolidation of the depths mud. However, there is no fundamental effect for treatment efficiency.

关 键 词：地基 吹填淤泥 排水管 真空度 固结度 

分 类 号：TU472.33[建筑科学—结构工程]