Defects in the construction of horizontal directional drilling

1. Since thehorizontal directional drilling construction is a new production technology, my country does not have a unified technical standard and construction acceptance specification, resulting in no official basis for the control of engineering design and construction quality. Once a quality accident occurs, the identification of the responsible party will also cause certain difficulties.

2 .Due to the use of directional reaming and dragging, when the construction is completed, the gap between the pipe and the re-expansion hole cannot be backfilled and compacted like a slotting facility worker. Therefore, there are certain risks in actual use of projects that require relatively high pipe settlement.