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

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UNION fACiFIC" backfill excavation in rock with granular material which shall be compacted and tested as required. 8.21.06 CAMBER - Camber shall be placed in all culverts where it is anticipated that the culvert will settle as the result of high embankment construction or compressible foundation soils below the culvert bedding. Unless otherwise specified by the Engineer, all culverts shall be cambered in accordance with the following: 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 8.21.04, last paragraph. c.) Embankments up to 8 feet high (measured base of rail to flowline) require a 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 -in. 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. 8.21.07 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, or as shown on the Drawings and Specifications. 8.21.08 ASSEMBELY - Pipe culverts shall be jointed with locking coupling bands in accordance with the provisions of the AREMA Manual for Railway Engineering Chapter 1, Part 4, Section 4.3.4. Coupling bands shall be of the same base material and finish as the pipe. Coupling bands for thirty inch (30 ") or larger culvert pipe shall be two foot (2') wide. The inside of the corrugated coupling bands and the outside of pipe culverts to be joined by corrugated coupling bands shall be kept clean and free of all dirt or gravel to ensure that the corrugations on the coupling bands and the pipe culvert fit snugly as the coupling bands are tightened. They should be tapped with a mallet or hard rubber hammer to ensure a tight joint. Coupling bands and the outside surface of the culvert pipe under the coupling bands often need to be lubricated with fuel oil or similar solvent to allow the coupling bands to be drawn firmly into place. Corrugated structural plate pipe shall be assembled in accordance with the manufacturer's detailed assembly instructions and UP Company Bridge Standard Plan No. 680030, Sheet 1 of 1. Bolts shall be tightened progressively and uniformly, starting at one end of the corrugated structural plate pipe after all plates are in place. 'Tightening shall be repeated to ensure all bolts are tight. When a power wrench is used for tightening bolts, the Industry shall check the tightening of the bolts with one handled structural or socket type torque wrench. Bolts shall be torqued uniformly to a minimum of 100 ft, lb. and a maximum of 300 ft. lb. or as specified in the manufacturer's detailed assembly instructions. 33