Abstract：
The vacuum preloading coupling flocculation treatment is a widely employed method for reinforcing soils with high water content in practical construction. However, uneven distribution and accumulation of flocculants pose significant damage to the soil environment and result in uneven soil consolidation, leading to severe issues in subsequent soil development and exploitation. To address these concerns, an evolved leaching with vacuum method is developed for facilitating soil consolidation while preventing the accumulation of flocculant in the soil. In this study, five model tests are conducted in which FeCl3 is chosen as the typical flocculant to promote soil consolidation, and deionized water is used for leaching. The final discharged water, settlement, water content and penetration resistance of soil are obtained to evaluate the soil reinforcement effect, while the flocculant removal effect is evaluated by the Fe3+ content in the filtrate and soil. The comprehensive reinforcement and flocculant removal effect show that this method is extremely effective compared to traditional vacuum preloading. The two leaching is clarified as the best choice, resulting in a 22% decrease in the soil water content and a 25% in soil penetration resistance, meanwhile a 12.8% removal rate of the flocculant. The test results demonstrate that leaching with vacuum preloading can contribute to promoting soil consolidation and reducing the accumulation of flocculant in the soil, ensuring the safe and eco-friendly use of the soil for future applications. The conclusions obtained are of significant theoretical value and technical support for practical construction and sustainable development.
摘要：
真空预压耦合絮凝处理是一种在实际施工中广泛采用的高含水率土壤加固方法。然而,絮凝剂的不均匀分布和积累对土壤环境造成重大破坏，导致土壤固结不均匀，在随后的土壤开发和开发中导致严重的问题。为了解决这些问题，开发了一种真空浸出方法，以促进土壤固结，同时防止絮凝剂在土壤中的积累。在这项研究中,选择FeCl3作为促进土壤固结的典型絮凝剂，进行了五次模型试验，和去离子水用于浸出。最后排出的水，结算，获得了土壤的含水量和抗渗透性，以评估土壤的加固效果，通过滤液和土壤中Fe3+的含量来评价絮凝剂的去除效果。综合加固和絮凝剂去除效果表明，与传统的真空预压相比，该方法极其有效。两种浸出澄清为最佳选择，导致土壤含水量减少22%，土壤渗透阻力减少25%，同时絮凝剂的去除率为12.8%。试验结果表明，真空预压浸出有助于促进土壤固结，减少絮凝剂在土壤中的积累。确保土壤在未来应用中的安全和环保使用。所得结论对实际建设和可持续发展具有重要的理论价值和技术支持。
