ABSTRACT
Slurry Method of Construction The slurry method of construction involves the use of a prepared slurry to keep the bore hole stable for the entire depth of excavation. The soil conditions for which the slurry displacement method is applicable could be any of the conditions described for the casing method. The slurry method is a
Figure 17.7 (continued) casing method of construction: (e) drilling ·below casing, (f) underreaming, (g) removing casing, and (h) completed shaft (O'Neill and
Reese, 1999)
Figure 17.8 Potential problems leading to inadequate shaft concrete due to removal of temporary casing without care (D'Appolonia, et aI., 1975)
viable option at any site where there is a caving soil, and it could be the only feasible option in a permeable, water bearing soil if it is impossible to set a casing into a stratum of soil or rock with low permeability. The various steps in the construction process are shown in Fig. 17.9. It is essential in this method that a sufficient slurry head, be available so that the inside pressure is greater than that from the GWT or from the tendency of the soil to cave.
