Jet Grout Slab to Reduce Wall Movements Caused by Excavation
DOI:
https://doi.org/10.21467/proceedings.7.7.20Abstract
Two-dimensional numerical analysis has been conducted on an excavation case in soft ground using jet grout slab to reduce wall deflections. The Young’s moduli of the jet grout slab were assessed from the uniaxial compression tests with the axial strains ranging from 0.4 % to 1.4 %. The lower bound secant moduli and uniaxial compressive strengths for the jet grout slab have been adopted in the numerical analysis. The computed wall deflections and ground movements match with those observed in the inclinometers installed in wall and in ground. The analyzed results show that the jet grout slab is an effective measure that could reduce the wall deflections by 36 %. By using the wall deflection path concept, the effects of the jet grout slab and adjacent piles on the wall movements have been assessed in a convenient way.
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