Clay Grouting Mechanisms and Applications

Abstract

Grouting in clay soils could easily lead to a poor grouting efficiency because of a lack of good understanding of the fundamental clay grouting mechanisms and grout rheological characteristics and grout hose system. Additionally, for the purpose of lifting tilted building and/or structure in clay soils, the dissipation of the excess porewater pressure generated during grout injection is likely to lead a negative final compensation efficiency. To address the said key engineering issues, a comprehensive study on the properties of grouts and effective grout injection is deemed to be necessary for the success of the project. Since grouting in clay soils rules out any other ground improvement methods other than fracturing grouting, the chapter presented herein would introduce not only previous studies for a better understanding of the grout properties but also two case histories for demonstrating how the final compensation efficiency can be improved by introducing the proposed simultaneous and multiple grouting technique.