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s� .� � <br /> , <br /> . 1 <br /> �laintain sides and slopes of excavations i_n safe condition until completion of backfillin�. 1 <br /> Shorin� and Bracin�: Provide materials for shorin� and bcacinq, such as sheet piling, <br /> uprights, stringers and cross-braces, in good serviceable condition. ' <br /> Establish requirements for trench shorin� and bracing to comply ��rith local codes and <br /> authorities having jurisdiction. � <br /> Maintain shoring and bracing in excavations regardless of time peciod excavations will be <br /> open. Carry down shorinq and bracing as excavation progresses. <br /> DewaterinQ: Prevent surface water and subsurface or ground water from flowin� into � <br /> excavations and from flooding project site and surrounding area. <br /> Do not allow water to accumulate in excavations. Remove water to prevent softening of ' <br /> foundation botzoms, undercuttinq footings, and soil changes detrimental to stability of <br /> subgrades and foundations. Provide and maintain pumps, well points, sumps, suction and <br /> � discharge lines, and other dewatering system components necessary to convey water , <br /> away from excavations. <br /> Establish and maintain temporary drainage ditches and other diversions outside , <br /> excavation limits to convey rain water and water removed from excavations to <br /> collecting or cun-off areas. Do not use trench excavations as temporary drainage <br /> ditches. � <br /> Material StoraAe: Stockpile satisfactory excavated materials where directed, until ' <br /> required for backfill or fill. Place, grade and shape stockpiles for proper drainage. <br /> Locate and retain soil materials away from edge of excavations. Do not store within ' <br /> drip line of trees indicated to remain. <br /> Dispose of excess soil material and waste materials as herein specified. � ' <br /> Excavation for structures: Conform to elevations and dimensions shown within a <br /> tolerance of plus or minus 0.10', and extending a sufficient distance from footinqs and ' <br /> foundations to permit placing and removal of concrete formwork, <br /> other construction, and foc inspection. <br /> In excavatinq for footin�s and foundations, take care not to disturb bottom of ' <br /> excavation. Excavate by hand to final grade just before concrete reinfo�cement is <br /> placed. Trim bottoms to required lines and grades to leave solid base to receive other <br /> work. � <br /> Excavation for Pavements: Cut surface under pavements to comply with cross-sections, <br /> elevations and �rades as shown. ' <br /> Excavation for Trenches: Dig trenches to the uniform width required for particular item <br /> to e insta e , su iciently wide to provide ample working room. Provide 6" to 9" <br /> clearance on both sides of pipe or conduit. , <br /> � EARTHWORK 02200 - 4 <br /> , <br /> � <br />