竖井地基热排水固结模型试验
发布时间:2018-08-19 06:47
【摘要】:设计竖井热排水固结模型试验系统,选取宁波地区典型软黏土,在室温和水热循环温度70℃下分别开展排水固结和热排水固结模型试验,分析加热、分级堆载、恒载降温阶段各测点的温度、孔隙水压力及地表沉降变化规律。研究结果表明:热排水固结法可加速地基模型的固结速率,固结度达到90%所需时间较排水固结法所需时间减少;经过温度历史后,地表最终沉降量增加,土的抗剪强度有所提高,增强软基处理效果。在试验基础上,分析热排水固结法作用机理,结合已有先期固结压力随温度变化理论,按e-lgp曲线法建立热排水固结法的沉降计算公式,并对竖井模型地表沉降进行计算,与试验结果吻合较好,初步验证公式的合理性。
[Abstract]:The model test system of hot drainage consolidation in shaft is designed. Typical soft clay in Ningbo area is selected. The model tests of drainage consolidation and thermal drainage consolidation are carried out at room temperature and 70 鈩,
本文编号:2190977
[Abstract]:The model test system of hot drainage consolidation in shaft is designed. Typical soft clay in Ningbo area is selected. The model tests of drainage consolidation and thermal drainage consolidation are carried out at room temperature and 70 鈩,
本文编号:2190977
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