Engineering quality assurance measures of horizontal directional drilling

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Horizontal directional drilling construction scheme for trenchless crossing project(2)

Chapter 5 Site restoration of horizontal directional drilling After the crossing line is connected to the pipeline on land and the pressure test is completed, the site can be restored.In the section immediately adjacent to the pipeline, fine soil shall be backfilled. During the backfilling process, the straight pipeline shall be avoided to be damaged by smashing or bumping, and hard …

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