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I <br />T <br />I <br />I <br />I <br />T <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />t <br />t <br />I <br />Project No. D-1885-06 <br />Christ Our Savior Catholic Parish <br />moisture content, high compressibility and water holding capacity, low specific gravity, <br />and low bearing capacity. It is generally considered that peat soil is not suitable for <br />supporting foundations or loadings in its natural state. Consequently, peat soil is <br />susceptible to instability such as localized sinking and slip failure, and massive and long- <br />term settlement when subject to even moderate load increase. <br />We propose the following different foundation support system altematives for the <br />construction of the new additional structures, viz mainly Sanctuary Building, Parish <br />Center, and Meeting rooms: <br />A. Sanctuary Building: <br />The following three options are available for foundation support of the new Sanctuary <br />building: <br />Option I. Driven Concrete Piles l4-inch or l6-inch Square: is recommended <br />Option III. Improving Peat Layers by Pre-Loading method and semi-rigid mat <br />foundation <br />These available options are discussed as follows: <br />Option I. Driven Concrete Pile l6-inch Square <br />Considering the potential for seismically induced liquefaction, shallow ground water, the <br />type of proposed building, its loading, and cost effectiveness, it is recommended to <br />provide l6-inch square concrete driven piles for the foundation support for a new <br />Sanctuary Building structure. <br />Pile driving would cause some vibrations and noise. However, driven piles are considered <br />to provide the most efficient deep foundation system in this case, especially since they <br />2I <br />Option II. Cast in-situ I 8" or 24" Concrete Caissons