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钢管公称直钢管外径×壁厚保温管外径×壁厚管中心距沟宽B垫砂厚C径(mm)(mm)(mm)E(mm)(mm)(mm)DN40D48×3110×2.5340850200DN50D60×3.5140×3360900200DN65D76×4140×3380920200DN80D89×4160×3.2400960200DN100D108×4200×3.94001000200DN125D133×4.5225×4.44501100200DN150D159×4.5250×4.94501100200DN200D219×6315×6.25001300200DN250D273×6365×6.65801400250DN300D325×7420×76601500250DN350D377×7500×7.87201700250DN400D426×7550×8.87801800300DN450D478×7600×8.89002000300DN500D529×8655×9.810002100300DN600D630×8760×1110602400300DN700D720×9850×1212502700300DN800D820×10960×1413502900300DN900D920×121055×1414503100300DN1000D1020×131155×1415503310300最小覆土深度(m)机动车道非机动车道0.80.80.80.80.80.811111.21.21.21.21.31.31.31.31.30.70.70.70.70.70.70.70.70.70.70.90.90.90.9111.11.11.1道保温厚度315365420500550600655760850960105511554846486262616365657068685656156707508008509051010110012101305140511841288139415261626172818342040222024302624282461967372477682687892910301120122013191419200.0250.0300.0350.0400.0450.0500.0600.0700.0800.0900.01000.0150187.5225262.5300337.537545052560067575034753512.535503587.536253662.5370037753850392540004075