Supplementary explanation: backfill and soil covering of pipe culvert 1) fill on both sides of pipe culvert: fill and compact in layers; Both sides shall be symmetrical, and the height difference shall not exceed 0.3m.
3) Pipe top covering soil ＞ 0.5m: mechanical filling and mechanical compaction…
(3) The filling section shall be leveled in advance.
(6) The top surface of pipe culvert within the filling height can be rolled by road roller only when the filling is more than 500mm.
The second-class constructor’s municipal engineering core points out the key points of subgrade construction, the notes of the second construction Xueba, long-term click on praise + forwarding + evaluation, and continuously update Oh, wendang version points my avatar private letter to me: 2022 (I) fill the subgrade (2) remove the water in the original area, remove tree roots, weeds, sludge, etc.
When the cross slope of the original ground is steeper than 1:5, it shall be built into a step form.
The pits and grooves of graves, wells and tree root pits shall be properly handled and filled to the original ground height in layers.
The height of each step shall not be greater than 300mm, the width shall not be less than 1.0m, and the top surface of the step shall be inclined inward.
2) Pipe top covering soil ≤ 0.5m: manual filling, manual compaction or small-scale machine compaction.
