库内层状软土地基的联合处理方法研究

Research on combination method for improving storehouse soft clay layered foundation

介绍了利用重锤夯实法加固表层填土与排水固结法加固深层软土联合处理库内层状软土地基的方法,在填土静荷载和塑料排水板作用下淤泥质软土很快完成主固结沉降,重锤夯实法使表层填土受到动力压密,软土和填土强度得以提高。试验结果表明,排水固结过程中填土层的单位沉降量远小于淤泥质软土,重锤夯实法的有效加固深度可以达到地表下 3.5 m,影响深度可达 6.0 m。联合采用两种地基处理方法可以有效提高层状地基承载力。

Combination method of tamping and drainage consolidation for improving storehouse soft clay layered foundation was introduced. The primary consolidation settlement of saturated soft clay has finished under static loading of fill soil treating with drainage consolidation; and the surface fill soil was dynamically compacted by tamping method. The strengths of fill and soft clay were increased. The results of test show that the unit settlement of saturated soft clay is much more than that of fill soil in process of drainage consolidation; the effective consolidation depth of tamping method is 3.5m;and the influencing depth can reach 6.0m. The bearing capacity of layered foundation could be increased effectively combined using drainage consolidation and tamping method.