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in these Specifications, the Industry will determine the method of extending existing pipe culvert <br />structures by consulting with the Engineer. See also Section 8.22.04. <br />8.23.00 CULVERTS - SMOOTH STEEL PIPE (SSP) — JACK AND BORED <br />These pipe culvert specifications cover the assembly and installation of Smooth Steel Pipe. <br />Where conditions warrant the installation of pipe culverts by jacking and/or earth boring can be a <br />viable alternative to more standard methods of installation. Smooth Steel Pipe shall be assembled and <br />installed in accordance with these Specifications and Chapter 1, Part 4 of the current AREMA <br />Specifications for culvert installation and UP Company Bridge Standard Plan No. 680000, Sheets 1 <br />and 2 and Plan No. 680010, Sheets 1 of 1. <br />8.23.01 SAFETY - Trenching is one of the most dangerous situations in construction, since a <br />jacking operation generally involves some fonn of trenching or pit construction, the jacking <br />Industry shall strictly conform to all Federal, State and local regulations and in particular, the <br />requirements of the Occupational Safety and Health Administration (OSHA). <br />8.23.02 JACKING AND BORING - Pipe boring and jacking operations shall be performed by <br />an experienced specialty Industry normally engaged in performing this type of service. <br />Excavation should not be carried more than a few inches ahead of the pipe. Jacking and boring <br />shall be done continuously to minimize the tendency of the material to "freeze" around the pipe. <br />However, lubricants such as bentonite slurry are available to minimize the freezing tendency. <br />The bore hole diameter shall be essentially the same as the outside diameter of the pipe. Boring <br />operations shall not be stopped if such a stoppage would be detrimental to the UP. A survey crew <br />shall continually monitor the elevation and alignment of the UP track(s) during the jacking <br />procedure and if there is track movement work must stop and the UP immediately notified. The <br />Industry shall submit a corrective action plan to the Engineer for his approval and the approved <br />repairs shall be completed as soon as possible. <br />8.23.03 JACKING AND BORING TOLERANCE - The tolerance from a true line is +/- 2" or <br />less. Adjustments to the line and level shall be gradual to ensure that the pipe manufacture's <br />stated angular deflection is not exceeded. <br />8.23.04 BORING PIT - The approach trench should be properly sheeted and braced on the sides <br />and working face. Wet sandy soils can be de- watered by various means including well points. A <br />detailed plan of the bore pit, including shoring proposals, shall be approved by the Engineer <br />before the Work is started. See also Section 8.21.04. <br />8.23.05 FIELD WELDING - Smooth steel pipe sections shall be welded per UP Bridge <br />Standard Plan No. 6800100, Sheet l of 1. Welders must possess valid certification. <br />8.23.06 PIPE CULVERT MATERIALS - Smooth steel pipe culvert material shall be in <br />accordance with ASTM International A139. Pipe to be Grade B and steel shall have a minimum <br />yield strength of 35 ksi. Smooth steel pipe shall have welded straight longitudinal seams. The <br />ends of each section of pipe shall be square cut and one shall be suitably beveled for field welding <br />sections together. <br />40 <br />