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原文传递 DESIGN METHOD FOR PREVENTING LONGITUDINAL UPLIFT OF CORRUGATED METAL PIPE.

题名：	DESIGN METHOD FOR PREVENTING LONGITUDINAL UPLIFT OF CORRUGATED METAL PIPE.
作者：	Morgan-BC; Lohnes-RA; Klaiber-FW; Kjartanson-BH
关键词：	DESIGN-METHODS; PREVENTION-; UPLIFT-; CORRUGATED-METAL-CULVERTS; STATE-DEPARTMENTS-OF-TRANSPORTATION; GUIDELINES-; DESIGN-STANDARDS; TIEDOWNS-
摘要：	Corrugated metal pipe (CMP) culverts in some situations have experiemced inlet uplift caused by unbalanced pore pressures. Many state departments of transportation (DOTs) have design guidelines for determining the magnitude of force required to restrain CMP against these uplift forces; however, these specified forces vary considerably. Also, the experimental or analytical bases for many of these specifications are unclear. The wide range of the specified tiedown resistances and the vague rationale for these standards suggest that design criteria based on experiments and analyses are needed. The objective of this paper is to describe a design method, developed from experimental and analytical studies, for determining the force required to restrain a CMP against inlet uplift. The design process presented here provides an easy-to-follow procedure that allows the engineer to make final design considerations based on judgment and experience. The method also indicates that in situations in which the soil or pipe is sufficiently stiff or in which total blockage of the pipe is unlikely, tiedowns may not be required. The design guidelines presented here are compared with the specifications of several state DOTs. This comparison indicates that several of the agencies' requirements are somewhat conservative whereas others may be unsafe, and also suggests that some agencies may be overlooking expanded use of CMP by limiting the maximum diameter of pipe that they allow.
总页数：	Transportation Research Record. 1996. (1541) pp107-111 (7 Fig., 1 Tab., 16 Ref.)
报告类型：	科技报告