The State of Practice in Deep Mixing Methods

Abstract

The deep mixing method is often classified into two, dry method and wet method based on the hardening agent (binder). The former utilizes the dry powdered binder whereas the latter utilizes the water-binder slurry. Naturally there are some differences in the execution machines between dry and wet methods. But to the author's knowledge, there is no substantial difference in the characteristics of treated soils between them. The apparent difference in the design procedure and application comes from the purpose of improvement, which in turn gives rise to the difference in the installation patterns and in the order of strength required. The present article summarizes the current state of practice of deep mixing and discusses the tasks for the coming decade mostly based on the experience gained in Japan.