TAILIEUCHUNG - Soils and Foundations Handbook phần 7

Thiết kế Thủ tục tham khảo 5 được khuyến khích. Xem xét Tất cả các bức tường trọng lực bao gồm cả những người được lấy từ các chỉ số tiêu chuẩn cần được kiểm tra sự ổn định. Các bức tường trọng lực chỉ số tiêu chuẩn không được thiết kế cho sự hỗ trợ của tải phụ phí hoặc backfills dốc. | Gravity Walls Design Procedure Reference 5 is recommended. Consideration All gravity walls including those taken from the standard indexes should be checked for stability. The standard index gravity walls are not designed for the support of surcharge loads or sloped backfills. These walls are sensitive to differential settlement so it must be carefully checked. Refer to the FDOT Structures Design Guidelines and the FDOT Plans Preparation Manual for procedures on design of walls. Counterfort Walls Design Procedure References 5 15 and 31 are recommended for Counterfort walls. Consideration This type of wall is typically not as economical as an MSE wall but it is competitive with cast-in-place walls. It can be used in extremely aggressive environments. Speed of construction is another advantage in congested areas. Refer to the FDOT Structures Design Guidelines and the FDOT Plans Preparation Manual for procedures on design of walls. MSE Walls Design Procedure References 12 13 14 15 16 17 18 and 19 are recommended for MSE walls. Consideration The use of proprietary MSE wall systems is growing more common as right-of-ways become limited and congestion grows. FDOT maintains standard indices of wall systems pre-approved for use as permanent and critical temporary walls. For all proprietary systems the Geotechnical Engineer is responsible for external stability and assuring that the design is compatible with the actual subsurface conditions. The system proprietor is responsible for internal stability. Control drawings will be provided to the proprietary wall companies which indicate the minimum lengths of reinforcement required for external stability. Drawings produced by the proprietor will show the actual reinforcement lengths required. These lengths will be the longer of those required for external stability as given by the Geotechnical Engineer and those required for internal stability as calculated by .

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