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三背回填是指哪三背

更新时间: 2020-11-06 00:00:00     

一般是在桥梁的桥台后面和涵洞的上部等部位的回填可以叫台背回填,填料一般是砂砾、灰土或石渣等。填筑要求较高。回填完成后,一定要保证在盖板上进行厚度大于50CM的填方施工,并用小型机具进行夯实。

关键词: 回填

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