真空联合堆载预压加固软基中的地下水位监测成果分析

地下水位的变化是影响真空联合堆载预压加固效果的重要因素之一。本文对浃里陈大桥试验段的地下水位测试方法与监测成果进行了分析 ,分析结果表明用水位计所测得的地下水位基本能反映真空状态下的地基中的实际水位情况 ;地下水位的变化与抽真空的作用时间、距真空泵的距离、与塑排的间距、堆载以及降水渗漏等因素相关。水位在抽真空的初始阶段下降较快 ,在路基堆载阶段有所上升 ,联合堆载预压阶段逐渐下降至基本稳定状态 ,形成一个稳定的渗流场。

Analysis on the Monitoring Results of Groundwater Table in the Consolidation of Soft Soil by Method of Vacuum Combined with Surcharge Preloading

The variation of groundwater table is one of the impor tant influencing factors in the soft ground improved by the method of vacuum com bined with surcharge preloading.The observation method and the monitoring result s of the groundwater table at the experimental site of Jialichen Bridge are anal yzed.The results show that the observed value of the groundwater table is close to the real groundwater table.The variations of groundwater table are related to factors such as the pumping time,the distance between groundwater and pump,the spaces of PVDS,the preloading and the dewatering.The groundwater table lowers qu ickly at the early stage of vacuum preloading and then becomes a relatively stab le seepage field.