太仓煤堆场软黏土地基堆载预压处理效果分析

采用塑料排水板堆载预压法对太仓煤堆场吹填土地基进行了加固处理,根据现场监测数据,分析了软土地基在堆载预压条件下的沉降和超静孔隙水压力的变化规律。研究结果表明:实测沉降—时间曲线与采用Logistic模型拟合得到的沉降—时间曲线较为吻合;塑料排水板插板深度范围内的各层地基土均发生了排水固结,而且地面以下占排水板总长度四分之三深度范围内的加固效果最佳。通过反演实测沉降曲线,得到了场地地基土径向固结系数平均值;最后对地基固结性状进行了分析,分析表明,本场地采用塑料排水板堆载预压法加固地基是有效的,研究成果可为后续工程地基处理设计提供可靠的设计依据。

Analysis on the effect of soft ground surcharge in Taicang improvement by preloading with coal storage yard

Taicang coal storage soft ground is improved by preloading with surcharge fill combined plastic drains. Based on the field monitoring data, the ground surface settlement and pore water pressure variation with time is analyzed. The results show that the monitored settlement curve is consistent with the calculated by Logistic model; Consolidation is observed in all layers in the depth of plastic drains and the best consolidated depth is the top three quarters. The average lateral consolidation coefficient is obtained by inversion of the settlement-time curves. Finally the ground consolidation effect analysis shows that the soft clay ground treatment method of preloading with surcharge fill combined plastic drains is effective. The research could be a reference for the later phase of the works.