饱和软土地基堆载预压排水固结沉降特性研究  

Analysis of Consolidation Settlement Effects in Saturated Soft-soil Improved by Preloading Combined with Plastic Drains

作　　者：黄建华[1] 张建勋[1] 陈国周[1] 赵志辉[1] 

机构地区：[1]福建工程学院土木工程系,福建福州350108

出　　处：《贵州大学学报（自然科学版）》2011年第6期87-93,共7页Journal of Guizhou University:Natural Sciences

基　　金：福建省自然科学基金项目(D0740003);福建省服务海西重点建设项目(闽教高[2009]8号)

摘　　要：为研究沿海饱和软土地基堆载预压排水固结沉降特性,针对变电站软土地基处理实际应用工程,利用非线性有限元软件,分析饱和软土地基下采用塑料排水板堆载预压排水固结沉降特性,同时考虑井阻效应和涂抹作用,解析计算并设计堆载预压排水固结相关参数和效果控制等,预测饱和软土固结度及其沉降特征,综合分析塑料排水板堆载预压地基加固效果与影响因素。结合工程现场监测数据和实际应用效果进行对比,分析软土地基堆载预压下沉降、分层沉降、深层土体位移、超静孔隙水压力等变化规律,验证有限元分析成果和固结度计算以及沉降预测的有效性,表明堆载预压和排水系统的有效结合,可以加速排水固结,对处理沿海饱和软土地基具有良好效果,将为今后类似地基处理工程提供借鉴。Base on actual application foundation reinforcement by method of preloading combined with plasticdrains in substation engineering, systematic study of consolidation settlement effects of coastal saturated soft soil were made by using nonlinear numerical simulation software and theoretical derivation. Mechanism and characteristic of consolidation settlement, related parameters, influence factors, control effect, etc. were generally analyzed in this paper, while consolidation degree and settlement features were predicted considering that the effects of well resistance and smear. By the comparison of site monitoring data and actual application effect, variation of total settlement, layered settlement, deep ground displacement, excess pore water pressure were comprehensively analyzed and effectiveness of infinite simulation and consolidation calculation results, settlement prediction were certified. Research results were verified by in-site projects and it indicates that preloading drains can accelerated drainage for similar foundation treatment consolidation in coastal saturated soft soil and theoretical engineering. combined with plastic basis can be provided

关 键 词：饱和软土地基 堆载预压 固结沉降 塑料排水板 地基处理 

分 类 号：TU472.6[建筑科学—结构工程]