TAILIEUCHUNG - Soils and Foundations Handbook phần 8

Những bức tường này là nhạy cảm để giải quyết sự khác biệt vì vậy nó phải được kiểm tra cẩn thận. Hãy tham khảo Hướng dẫn Thiết kế cấu trúc FDOT và FDOT Kế hoạch Hướng dẫn sử dụng Chuẩn bị các thủ tục về thiết kế của bức tường. | 6. Recommendations for technical special provisions for footing construction including compaction requirements and the need for particular construction methods such as dewatering or proof rolling in addition to the Specification 455 requirements. Estimate the reduction in settlements anticipated resulting from these special requirements. 7. Sinkhole potential. Driven Piles 1. Suitable pile types and reasons for design selections and exclusions. 2. Plotted design curves of soil resistance for selected pile size alternates. Plotted curves should present the Davisson capacity ultimate skin friction and mobilized end bearing versus pile tip elevation for the existing soil profile. The Davisson capacity is equivalent to the LRFD s nominal resistance Qn . Unless otherwise specified separate pile analyses for recommended pile sizes are to be performed for each SPT boring and or CPT sounding. A corresponding pile capacity curve for each analysis must also be provided. When more than one boring is taken at a pile group or when it is appropriate to otherwise generalize the soil strata the corresponding pile capacity curves are to be shown on the same plot and a recommended relationship established for that particular structure s . 3. Recommendations for minimum pile length or bearing elevation to minimize post-construction settlements if applicable. 4. Minimum pile spacing shall be at least three times the width of the pile used. 5. Estimated pile settlement and pile group settlement if significant. 6. Effects of scour downdrag and lateral squeeze if applicable. 7. Estimated maximum driving resistance to be encountered in reaching the minimum tip elevation. If the SPT-97 ultimate bearing capacity computed at or above the minimum tip elevation exceeds the maximum ultimate resistance defined in the Structures Design Guideline for the pile size s used determine the preforming or jetting elevations required to reduce the driving resistance to an acceptable magnitude. .

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