Should warning tapes not be laid in the subgrade and pavement?
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This post was last edited by Kagawa on 2018-7-24 at 16:37. In clause 2.5.1 of the CJJ33-2005 Standards for Construction and Acceptance of Urban Gas Distribution Projects, there is a statement that says, “Warning tapes shall not be laid within the subgrade or road surface.” I would like to ask everyone how to understand the meaning of this statement? Isn’t the structure of a road made up of the pavement and subgrade? If warning strips are not laid on the subgrade or pavement, then where else can they be laid?
No one replied, so I’ll give my own opinion. In my view, the regulations seem to confuse the concepts of subgrade and pavement, treating the concept of pavement as if it were simply subgrade plus pavement. The regulations should state instead that gas pipeline warning strips must not be laid within the pavement. I’m not sure if my understanding is correct; please feel free to correct me.
Buried pipelines are generally in the soil; if there is a road above them (the road surface consists of a compacted foundation, a subgrade layer, and asphalt-bound aggregates),； I’m just telling you to put the warning tape in the soil, not in the pile of stones
This post was last edited by Kagawa on 2018-7-26 12:09. Thank you for your reply; does “strengthening the foundation” fall under the category of “earth”? In our road engineering field, roads are divided into subgrade and pavement; the subgrade serves as the solid foundation, while the pavement consists of layers of gravel.