应该是要求做资料的,但具体的请按照当地要求来ÈWm3Ïè!bbs.3c3t.comâä^(ÿ|Z
圆管涵台背回填的要求参照桥梁台背回填要求,在桥涵规范上有ÈWm3Ïè!bbs.3c3t.comâä^(ÿ|Z
圆管涵台台背回填范围:管节外径+2mÈWm3Ïè!bbs.3c3t.comâä^(ÿ|Z
台背回填高度:管节外径+50cm覆土ÈWm3Ïè!bbs.3c3t.comâä^(ÿ|Z
每层厚度根据要求不同一般是20cm或15cm一层ÈWm3Ïè!bbs.3c3t.comâä^(ÿ|Z