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The Geology of South Florida With Emphasis on Deep Foundations

机译:南佛罗里达州的地质,强调深厚的基础

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This paper briefly discusses the geologic conditions in South Florida relative to the design, construction, and performance of deep foundations. The subsurface conditions in this area are unique in that the rock layers are highly porous and often very soft, and are sandwiched between layers of typically loose, uncemented quartz fine sands. Due to the high porosity of the Miami Limestone, 4-inch diameter rock coring is often required to obtain intact samples, and dewatering of excavations is sometimes difficult or impossible. The sand layers, typically tens of feet thick, are very loose to loose in relative density and have been the cause of unexpected large, deep foundation settlements. The engineering properties of the various geologic formations are discussed, along with typical deep foundation types used in the Miami area prior to and after 1980.
机译:本文简要讨论了南佛罗里达州与深层基础的设计,施工和性能有关的地质条件。该区域的地下条件是独特的,因为岩石层是高度多孔的并且通常非常柔软,并且被夹在通常为松散的,未胶结的石英细砂层之间。由于迈阿密石灰石的高孔隙率,通常需要4英寸直径的取芯钻来获取完整的样品,并且有时很难或不可能对挖掘的土地进行脱水。通常为几十英尺厚的沙层在相对密度上非常松散或松散,并且是意外的大而深的基础沉降的原因。讨论了各种地质构造的工程特性,以及1980年前和之后在迈阿密地区使用的典型深层基础类型。

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