Geological Engineering: Proceedings of the 1st International Conference (ICGE 2007)
26 Trenchless Pipe-Paving in Complex Hard Stratum by Directional Drilling Technology
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As we all know, it is very difficult to pave any pipe in a complex stratum involving hard stratum, middle-hard stratum and backfilling stratum especially for the narrow space for directional drilling machine. However, a pipe-paving project for waste hot water drainage was fulfilled successfully by the author and his colleagues last year. Based on that experience, many new key high-technologies and measures used in that project are introduced in this paper such as the wireless navigation, the hydraulic correction, the forward direction reaming and the drilling with a tube followed. That project shows the pipe-paving project using a small...