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The horizontal directional drilling method is used to drill a directional borehole between two excavations. The installation method is used when crossing water, motorways, avenues and railway lines. The horizontal directional drilling method offers particular advantages when the conditions make it difficult or impossible to use an open construction method.
Rotation, lifting and thrusting movements and liquefaction in the borehole enable propulsion in a wide variety of soil conditions. The soil loosening is supported by a bentonite drilling fluid (drilling suspension) and the drilling material is flushed out of the channel. After the first drilling, the drilling channel is enlarged and grouted during retraction. This creates a stable drilling channel for laying the SRV-G tc.
Source: Installation concepts in fibre optic expansion - Adams Consult (Whitepaper)
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|Installation concepts in fibre optic expansionAccess to the document, register here.||Whitepaper||23.12.2021|