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目次1总则·······························································⋯⋯12术语·······························································⋯⋯23基本规定······················································。··⋯⋯43.1一般规定························································。⋯43.2施工准备······················································⋯⋯43.3施工现场安全防护··········································⋯⋯53.4质量验收······················································⋯⋯64土方·····································。·························⋯⋯84.1开挖与支护·······················。···························⋯⋯84.2回填与警示带敷设························。·············。···⋯⋯125基础及附属构筑物·············································⋯⋯166输配管道··········。··············································⋯⋯196.1一般规定···················································⋯⋯196.2钢质管道焊接················································⋯⋯216.3钢质管道法兰连接··········································⋯⋯256.4埋地钢质管道防腐和阴极保护······························⋯⋯266.5埋地钢质管道敷设··········································⋯⋯296.6聚乙烯管道敷设·············································⋯⋯296.7球墨铸铁管道敷设··········································。··⋯326，8架空管道安装················································⋯⋯356.9管道附件安装················································⋯⋯377管道穿跨越··················································.·.·⋯⋯397.1一般规定···················································⋯⋯397.2水域开挖穿越················································⋯⋯397.3水平定向钻穿越·············································⋯⋯42左1tlOJO“八UA人︵UC11八jtIC沙11lesl11庄上八匕9山月任产0叹U，.八吕9曰庄人月了Q口件r八X以1上4A工4A几亡J工‘J乃卜U内b﹄b叹U设U内btl︻1勺It︸1tlOn︶QUQU只︺81吕OJOJQ。OC︺0，1︵.1lesl1111.17.4顶管法穿越··⋯7.5管桥和随桥跨越8厂站工艺管道··································.................⋯⋯8.1一般规定8.2管道安装8.3管道...