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真空荷载提供了一种减少堤坝软土地基固结时间的选择 .本文开展了一个海堤全断面的试验及原型观测研究 .试验堤高 5 .5m ,2 2m深且三角形布置的塑料排水板作为竖向排水通道 ,现场布置了水平测斜和沉降仪等观测仪器 ,埋设在不同地基深度的孔隙水压力计用来量测真空堆载联合荷载下的地基中超静孔隙水压力的变化 .通过场地条件分析、高真空度维持和真空卸载 ,得到了系统的沉降变形和孔隙水压力资料 ,试验结果验证了真空堆载联合预压加固海堤软土地基的效果 .
Vacuum load provides a choice to reduce the consolidation time of embankment soft soil foundation.This paper carried out a full test of the seawall and prototype observation research.Experiment embankment height of 5.5m, 22m deep and triangular layout of the plastic drainage board as a Vertical drainage channel, the scene of horizontal inclinometer and sedimentation instrument and other observational instruments, buried in different depths of the ground-based pore water pressure gauge used to measure the vacuum load under the combined load of excess pore water pressure changes in the ground through the site Condition analysis, high vacuum maintenance and vacuum unloading, the settlement deformation and pore water pressure data of the system are obtained. The experimental results verify the effect of vacuum surcharge combined with preloading for reinforcing the soft soil foundation of seawall.