David Willoughby

Geotechnical Considerations for Successful HDD Projects- Characteristics of Cohesion Soils

Cohesive Soils and Their Impact on HDD Stability

Cohesive soils, including clays and silts, exhibit varying stability based on moisture content and plasticity. These soils transition from hard, brick-like states to moldable clays and, ultimately, to muddy water as moisture increases. The stability of a borehole during Horizontal Directional Drilling (HDD) depends on these properties, with higher clay content and plasticity indices indicating more stable drilling conditions. Properly assessing these factors is crucial for successful HDD operations.
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