Abstract

Aiming at the problems of soil column forming near the plastic vertical drains and soil cracking during electro-osmosis stage in the treatment of dredged slurry by vacuum pre-loading combined with electro-osmosis method, this paper proposed a new method, i.e. vacuum pre-loading combined with electro-osmosis and with dynamic compaction method. Through the laboratory model tests in self-made glass bucket, the optimal combination form of vacuum pre-loading, electro-osmosis and dynamic compaction was obtained by studying the drainage of soil, soil surface settlement, current intensity and the reinforcement effect of dredged slurry under different combination forms. The test results show that under the condition that the total dynamic compaction energy is fixed, when dynamic compaction was combined both in the vacuum pre-loading stage and the electro-osmosis stage, which not only promoted the drainage of soil to the greatest extent; but also effectively enhanced the circuit current and slowed down the attenuation of the circuit current. Moreover, compared with other combination forms in this test, the energy consumption was reduced to the greatest extent. In addition, in this test, when dynamic compaction was combined both in the vacuum pre-loading stage and the electro-osmosis stage, the optimal reinforcement effect of dredged slurry was obtained.

摘要

针对真空预压结合电渗法处理疏浚泥浆中电渗阶段在塑料垂直排水沟附近形成土柱和土体开裂的问题，提出了一种新的方法，即真空预压。加载结合电渗透和强夯法。通过自制玻璃桶室内模型试验，通过对土壤排水、土壤表面沉降、电流强度和疏浚泥浆加固效果的研究，得到了真空预压、电渗和强夯的最佳组合形式。在不同的组合形式下。试验结果表明，在强夯总能量固定的情况下，在真空预压阶段和电渗阶段结合强夯，不仅最大程度地促进了土壤的排水；同时也有效地增强了电路电流，减缓了电路电流的衰减。而且，与本次测试中的其他组合形式相比，最大程度地降低了能耗。此外，在本次试验中，将真空预压阶段和电渗阶段强夯相结合，得到了疏浚泥浆的最佳加固效果。最大程度地降低了能耗。此外，在本次试验中，将真空预压阶段和电渗阶段强夯相结合，得到了疏浚泥浆的最佳加固效果。最大程度地降低了能耗。此外，在本次试验中，将真空预压阶段和电渗阶段强夯相结合，得到了疏浚泥浆的最佳加固效果。