Sensitivities Of Braced Deep Excavations To Jet Grout Pile Applications

In poor ground, jet grout pile (JGP) slabs may be used as preinstalled struts in deep excavations, to bring significant benefits to the earth-retention system. Based on the author’s experience, top-down construction projects may require JGP slab usage to enable serviceability design criteria to be met at all construction stages, and to reduce base heave, ground settlement and soil loads on retaining walls during construction. This paper discusses parametric finite element sensitivity studies performed to predict qualitatively the performance of JGP slabs in reducing retaining wall loads, deflections, and associated ground movements.