During the pipeline construction in backfill soil area it is needful to treat backfill soil around pipeline according to property of backfill soil.

在回填土地区进行管道施工，应根据回填土的性质，对管底及管顶的回填土进行处理。

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During the pipeline construction in backfill soil area it is needful to treat backfill soil around pipeline according to property of backfill soil.

在回填土地区进行管道施工，应根据回填土的性质，对管底及管顶的回填土进行处理。

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