Improving Soft Soil Mechanical Properties Using an Innovative Grouting Methodoloy

* 9820773 Alshawabkeh这个探索性研究（SGER）项目的小额赠款涉及一个小规模的，探索性的研究，一个新的和创新的技术，用于软土稳定。 电场下的离子迁移将用于注入带电添加剂，以通过胶结作用稳定土壤。 该项目将展示离子迁移在改善土壤特性（如压缩性和剪切强度）方面的潜在用途。 由于该技术不依赖于孔隙流体流动，它可以有效地用于低导水率的土壤，很少或没有相关的土壤体积变化。 如果得到证实，这种技术将允许在合理的时间内就地稳定，而不会引起大的体积变化。 在本研究中，灌浆方法将应用于粘土样品，并在灌浆前后进行力学测试，以评估力学性能的改善程度。 将评估土壤的电化学特性，并评估孔隙流体化学和pH值对电渗流速率的影响。 为了在电化学稳定化测试期间控制电渗流，该步骤是必要的。 然后将在不施加电场的情况下进行批量试验，以评估添加剂对改善土壤机械性能的有效性。 最后，将使用电场进行实验室规模的测试，以证明电场下离子迁移的土壤胶结效果。***

***9820773 AlshawabkehThis Small Grant for Exploratory Research (SGER) project involves a small-scale, exploratory investigation of a new and innovative technique for soft soil stabilization. Ion migration under electric fields will be used to inject charged additives in order to stabilize soils via cementation. This project will demonstrate the potential use of ion migration to improve soil characteristics such as compressibility and shear strength. Because the technique does not depend on pore fluid flow, it can be used effectively in soils with low hydraulic conductivity with little or no associated soil volume change. If proven out, this technique will permit in situ stabilization in a reasonable time period without causing large volume changes. In this study, the grouting methodology will be applied to clay samples, and mechanical testing will be performed before and after grouting to assess the degree of mechanical property improvement. The electrochemical properties of the soil will be evaluated and the impact of pore fluid chemistry and Ph on the rate of electroosmotic flow will be assessed. This step is necessary in order to control electroosmotic flow during the electrochemical stabilization tests. Batch tests will then be conducted without the application of electric fields in order to assess the effectiveness of additives on improving soil mechanical properties. Finally, bench-scale tests will be conducted using electric fields to demonstrate the effectiveness of soil cementation by ion migration under electric fields. ***