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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。
Based on the on-site monitoring data, the settlement and excess pore water pressure of soft soil foundation under the conditions of preloading were analyzed. law. The results show that the measured settlement-time curve is in good agreement with the settlement-time curve fitted by Logistic model. The drainage and consolidation of all layers of soil in the depth range of the plastic drainage board flapper occur, and the drainage board Three-fourths of the total length of the depth of the reinforcement effect of the best. Through the inversion of the measured settlement curve, the average value of the radial consolidation coefficient of the foundation soil is obtained. Finally, the consolidation behavior of the foundation is analyzed. The analysis shows that it is effective to reinforce the foundation by preloading with the plastic drainage board, The research results can provide reliable design basis for subsequent engineering foundation treatment design.