David Willoughby

Geotechnical Considerations for Successful HDD Projects- Granular Soil Properties on Construction Methods

Impact of Granular Soil Properties on HDD

Granular soils, including gravels, sands, and silts, vary in particle size, shape, and distribution, which significantly impact Horizontal Directional Drilling (HDD) methods. Rounded particles, often formed by river or creek processes, tend to have less interlocking capability, making it more challenging to maintain a stable drilled hole. These types of particles typically require a fluid condition to keep the hole intact. In contrast, angular particles, resulting from geological processes like glacial activity, offer greater interlocking ability and generally provide better stability for a drilled hole. Understanding these soil characteristics is crucial for effective HDD planning and execution.
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