Laserfiche WebLink
3.2 FILL SURFACE PREPARATION <br /> A. Immediately before additional low permeability fill and permanent embankment fill is added to an <br /> existing fill surface that surface shall meet the following specifications: <br /> 1. Surfaces to receive fill shall be free of debris,organic materials, particles larger than six inches,and <br /> other deleterious materials. <br /> 2. Previous fill surfaces to receive additional fill shall be compacted to the required relative density of <br /> 95 percent relative compaction(standard Proctor)with moisture content within a range of-2 to+3 <br /> percent of the optimum moisture content. <br /> 3. If more than 24 hours has elapsed since the previous lift has been placed,prior to placement of <br /> subsequent lifts,previous fill surfaces shall be scarified to a depth of 2-inches with a disc or similar <br /> equipment and moisture conditioned to facilitate bonding with the new fill. <br /> 4. Surfaces to receive fill shall not have ponded water,snow or ice,nor be desiccated or cracked. <br /> 3.3 PLACEMENT AND COMPACTION <br /> 1. Materials shall be placed in lifts not greater than 8 inches of thickness unless greater thicknesses <br /> are allowed by the Engineer upon demonstration by the Contractor that the materials and <br /> compaction efforts are adequate to obtain the required density. <br /> 2. Material shall be placed in a uniform lift and thoroughly compacted by compaction equipment <br /> suitable for the material encountered to obtain the required density prior to the placement of <br /> succeeding lift. <br /> a. Each lift shall be tested for proper compaction before successive lifts are applied. <br /> 3. Stones shall not exceed 6 inches in greatest dimension and shall be well distributed throughout the <br /> soil mass.Stone shall be defined as rock material either in its natural or broken state. <br /> 4. Stones not well mixed with soil material shall not be used in earth embankments unless the stone <br /> material is sufficiently deteriorated or friable so as to be compactible to achieve minimum voids and <br /> required density. <br /> 5. If the required density is not obtained,compaction of the embankment shall continue until <br /> specified densities are obtained,before any additional embankment is placed.Improperly com- <br /> pacted embankment shall be removed. <br /> 6. Where required,the Contractor shall,at his expense,add sufficient water during the compaction <br /> effort to assure proper density. If,due to rain or other causes,the material exceeds the optimum <br /> moisture content for satisfactory compaction,it shall be allowed to dry,assisted by discing or <br /> harrowing,if necessary,before compaction or filling effort is resumed. <br /> 7. Compaction or consolidation achieved by traveling trucks,machines and other equipment will not <br /> be accepted unless such procedures are approved by the Engineer and proper compaction density is <br /> achieved. <br /> Loloff Slurry Wall 3123 00-3 <br />