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1、最小覆土深度（m）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机动车道 非机动车道（mm)径（mm）（mm）E（mm）（mm）（mm）DN40DN50DN65DN80DN100DN125DN150DN200DN250DN300DN350DN400DN450DN500DN600DN700DN800DN900DN1000D483D603.5D764D894D1084D1334.5D1594.5D2196D2736D3257D3777D4267D4787D5298D6308D7209D82010D92012D1020131102.5140314031603.22003.92254.4
2、2504.93156.23656.642075007.85508.86008.86559.87601185012960141055141155143403603804004004504505005806607207809001000106012501350145015508509009209601000110011001300140015001700180020002100240027002900310033102002002002002002002002002502502503003003003003003003003000.80.80.80.80.80.811111.21.21.21.21
3、.31.31.31.31.30.70.70.70.70.70.70.70.70.70.70.90.90.90.9111.11.11.1道31536542050055060065576085096010551155保温厚度56548615466704875062800628506190563656570686811846191288673139472415267761626826172887818349292040103022201120243012202624131928241419200.0250.0300.0350.0400.0450.0500.0600.0700.0800.0900.01503475187.53512.52253550262.53587.53003625337.53662.5375370045037755253850600392567540007504075101011001210130514051000.0