Closure to 'Design and Construction Guidelines for Deep Soil Mixing to Stabilize Expansive Soils' by Raja S. Madhyannapu and Anand J. Puppala

摘要

The writers would like to express their appreciation to the discusser for the comments provided on the original paper. Following are the responses to the comments by the discusser. As noted by the discusser in Item la of the discussion, predril-ling of deep soil mixing (DSM) locations prior to soil mixing was necessary and achieved using a flight auger of diameter similar to the one used for the construction of DSM columns [0.6-m (2-ft) diameter]. Due to the stiff to very stiff nature of unsaturated in situ soils, spoil produced was minimal during the predrilling process. During retrieval of flight auger, few of the loosened soil lumps were reintroduced into the predrilled DSM hole prior to soil mixing step. The extra material shown in Fig. 12 in the original paper was produced during actual soil mixing process and it shows the low amounts of spoil produced during the field mixing operations.