深厚软土未打穿砂井超载预压地基孔隙水压力消散规律分析  

Consolidation analysis for partially penetrating sand drain ground preloaded by surcharge

作　　者：郝玉龙[1] 陈云敏[1] 王军[1] 

机构地区：[1]浙江大学岩土工程研究所,浙江杭州310027

出　　处：《中国公路学报》2002年第2期36-39,共4页China Journal of Highway and Transport

摘　　要：针对深厚软土未打穿砂井地基 ,考虑了井阻、涂抹及土体结构损伤破坏对固结的影响 ,将砂井区三维固结向一维固结等效转化的计算方法作了改进 ;给出了单面排水多级等速加、卸载条件下双层地基的超静孔隙水压力计算公式 ;将砂井区连同下卧层连在一起作为双层地基 ,分析了某机场跑道砂井超载预压地基的孔隙水压力消散规律。In view of the influence of well resistance,smeared effect and structural breakage of thick soft clay to consolidation of partially penetrating sand drain ground,this paper ameliorates the equivalent calculation method about the transformation from 3 D consolidation to 1 D consolidation in the region of sand drain.It deduces the excess pore water pressure's calculation formula of double layered ground under the condition of drained top only and multilevel equably loading or unloading,then uses the formula to calculate and analyse the dissipation rule of excess pore water pressure of a airport runway's ground which treated with partially penetrating sand drain and preloaded by surcharge.

关 键 词：深厚软土 孔隙水压力 消散规律 未打穿砂井地基 一维等效计算 超载预压 砂井区 双层地基 软土地基 

分 类 号：TU472.3[建筑科学—结构工程] TU471.8[建筑科学—土工工程]