动力排水固结软基处理模型试验研究  

Model Testing Study on Dynamic Drainage Consolidation Method for Soft Soil Foundation Treatment

作　　者：赵建华[1] 陈晓斌[2] 

机构地区：[1]中南林业科技大学测绘科学与技术学院,长沙410004 [2]中南大学土建学院,长沙410083

出　　处：《地下空间与工程学报》2009年第1期60-66,73,共8页Chinese Journal of Underground Space and Engineering

摘　　要：介绍了动力排水固结室内模型试验,并从室内模型试验出发,对动力排水固结加固效果进行研究,建立了一个相似比1:2的室内动力排水固结加固淤泥质软土的试验模型,严格控制试验条件和工艺参数,研究了动力排水固结淤泥质软土的效果。通过室内模型试验研究,总结了动力排水固结加固软土地基效果的影响因素,被加固土体的变形规律,超孔隙水压力的消散规律和加固过程中软土地基振动液化安全稳性系数变化规律,提出了动力排水固结软土地基有效加固深度确定方法和动力排水固结加固效果评价方法。A model test of the dynamic drainage consolidation method is described and the dynamic drainage consolidation effects are studied, then a silty soft soil dynamic drainage consolidation model with 1：2 resembling ratio was built up in this test. In the model testing, with the strictly controlled drainage and dynamic loading conditions, the effects of silty soft soil foundation consolidation and its changing proceeding are analyzed. During the silty soft soil foundation dynamic drainage consolidation, the main factors which affect the consolidation effects aresummaried up. At the same time, the silty soft soil＇s deformation proceeding, the excess pore water pressure＇s dissipation law, and the foundation liquefaction safety coefficient＇ s changing law are concluded in this paper. At last, a coefficient for the Menard formulation to calculate dynamic drainage consolidation depth is ascertained in this kind of soft soil foundation treatment method. Some normal soil engineering testing methods are used to estimate the silty soft soil dynamic drainage consolidation effects. The consolidation effect shows that the dynamic drainage consolidation method is suitable to consolidate the soft soil foundation.

关 键 词：软土地基处理 动力排水固结 模型试验 超孔隙水压力 

分 类 号：TU411[建筑科学—岩土工程]