大变形吹填地基排水体不良状态分析与对策研究  

ANALYSIS AND COUNTERMEASURES FOR DEFECTIVE WATER DRAINAGE STRUCTURE OF HYDRAULICALLY FILLED FOUNDATION WITH LARGE DEFORMATION

作　　者：唐彤芝[1] 徐锴[1] 吴月龙[1] 盛东升[1] 王海鹏[1] 

机构地区：[1]南京水利科学研究院,南京210029

出　　处：《建筑技术开发》2015年第8期40-45,共6页Building Technology Development

基　　金：水利部公益性行业科研专项"河湖底淤综合处理与利用技术研究"(201201015);中央级公益性科研院所基本科研业务费专项资金面上项目"吹填淤泥地基大变形对排水固结的影响及技术改进"(Y314012)

摘　　要：对无砂垫层浅层真空预压法处理新近吹填淤泥常常出现的水平管路淤堵和扁瘪、竖向排水板淤堵和弯折四种不良状态的现象、原因以及影响等进行了阐述和分析，指出其影响主要体现在真空压力传递损失加大，超静孔压消散速度减缓，强度和承载力增加缓慢，中下部地基加固效果偏差等。不良状态的存在降低了能量功效率，但经过3～4个月的预压固结，其效果是能满足工程建设对浅层处理的要求的。Horizontal pipeline blocking and crushing, vertical water-retaining board blocking and collapse are four defects of hydraulically filled silt shallow foundation layer treated using vacuum preloading method without sand cushion. This paper described and analyzed in depth the reasons and impact of these four defective phenomenon, and pointed out that these defects may increase the loss of vacuum pressure in transmission, slow down the dissipation of excess pore pressure and the increase of strengthen and bearing capacity, as well as reduce the reinforcement effect of middle and lower parts of foundation. These defects reduced energy efficiency, but the construction effect could still satisfy the requirements for shallow layer treatment after preconsolidation for three or four months.

关 键 词：吹填淤泥 排水体 大变形 固结 

分 类 号：TU753[建筑科学—建筑技术科学]