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在疏浚吹填施工中,如何快速降低吹填土的含水率是吹填区软基处理的一项关键工作。为进一步提高排水效率,开展了基于泥沙流变学原理的脉动真空预压排水技术研究。通过大量室内小尺度单板排水模型试验,阐释了脉动作用对促进淤泥质软基脱水的作用机理,分析了脉动真空预压法的排水效果,提出了淤泥质软基处理新方法。试验结果表明此方法优于现行常用的真空预压排水法,有效提高了排水效率,可减轻排水板通道的淤积堵塞问题。
In the construction of dredging and reclamation, how to quickly reduce the water content of dredged fill is a key task of soft foundation treatment in the dredging area. In order to further improve the drainage efficiency, a pulsating vacuum pre-drainage drainage technology based on sediment rheology was developed. Through a large number of indoor small-scale single-board drainage model tests, the mechanism of pulsation on the dewatering of soft silty soil is explained. The drainage effect of pulsating vacuum preloading method is analyzed. A new method for treating silty soft ground is proposed. The test results show that this method is superior to the current commonly used vacuum preloading drainage method, effectively improve the drainage efficiency, reduce the deposition of the drainage board channel congestion problems.