2012-03-07_PERMIT FILE - C2010088 (24)

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UN(ON PACEFlG a) The culvert shall not be cambered so high in the center that water will be pocketed at the inlet end of the pipe. b) Culverts resting on rock foundations need not be cambered. Refer to Section 8.22.05, last paragraph. c) Embankments up to 8 feet high (measured base of rail to flowline) require 1 -1/2 inch camber. d) Embankments 8 feet to 12 feet high require a 2 -1/2 inch camber. e) Embankments 12 feet to 24 feet high require a 4 -inch camber. f) Embankments 24 feet to 36 feet high require a 6 -inch camber. The above camber standards, based on the height of embankments, may be adjusted in the field where, at the discretion of the Engineer, a greater or lesser amount of camber should be built into pipe to adjust for soil conditions encountered at the site. For fills higher than 36 feet, the AVP Design will provide the camber requirements. 8.22.07 RIPRAP PROTECTION - Both the inlet and outlet ends of all culverts shall be protected by riprap. The riprap shall be installed per detail on UP Company Bridge Standard Plan No. 680000, Sheet 2 of 2 (this plan refers to steel pipe but the riprap section shall also apply to concrete pipe) or as shown on the Drawings and Specifications. 8.22.08 ASSEMBLY - Pipe may be bell and spigot or tongue and groove unless otherwise specified. When bell pipe is used, a shallow excavation shall be made underneath the bell of sufficient depth so the bell does not rest on the bedding material. Ends of reinforced concrete pipe shall be of such design that when properly laid, they shall have a smooth and uniform interior surface. In areas where the pipe will tend to separate, suitable ties shall be installed. Joints shall be made with either mortar, grout, rubber gaskets, plastic mastic compounds, or by a combination of these types. Any joint system must be approved by the Engineer prior to installation. In general, mild bends, no more than a fifteen (15) degree change in either vertical or horizontal alignment at fifty foot (50') intervals, should be used. Pipes used on curves shall have both ends beveled to provide a smooth curve. In no case shall any pipe end be beveled greater than seven and one -half (7 -1/2) degrees, and suitable ties shall be installed. If the resulting gap is less than one inch, the resulting space is to be filled with mortar concrete. For gaps of one inch or greater, a reinforced concrete collar shall be poured around the joint as directed by the Engineer. 8.22.04 LAYING CULVERT PIPE - Installation of culvert pipe shall conform to the current AREMA Manual for Railway Engineering, Chapter 1, Part 4, each pipe culvert shall be laid true to the flowline grade. The minimum gradient for any pipe culvert shall be zero point five percent (0.5 %) or as directed by the Engineer. If two or more pipe culverts are to be laid parallel to each other, such parallel pipe culverts shall be spaced to permit thorough compaction of the backfill as required by Section 8.21.10 below. Parallel culverts shall be separated by a distance of at least one -half (1/2) of the nominal diameter of the pipe culverts, but not less than twelve inches (12 ") nor shall it exceed forty eight inches (48 "). 38