Published on: October 30, 2019
When it comes to engineers and contractors undertaking new trenchless installation work, it is all about understanding how the ground may behave in response to a given trenchless method. The anticipated behavior considers several complex elements: real-world experience, a fundamental understanding of resultant ground behavior when a specific soil matrix is removed from the ground, strength of the ground to support equipment, a means to stabilize the borehole, and sufficient soil strength to prevent
inadvertent returns (“frac-out”).
One consideration often overlooked is fully understanding the geological history of an area. On large, engineered trenchless installations, it is imperative for the engineer to understand the geological setting of the project, and determine the possible consequences and controlling effects the geology has on the proposed crossing. Part three of this three-part series in the Northeast Journal of Trenchless Technology Practice’s fall issue looks closely at the complications associated with the use of microtunnel boring machines (MTBM) in glacial lake-bed deposits in the Hartford, Connecticut, area. Haley & Aldrich’s Brad Miller, P.G. will briefly examine how deciphering the geologic history (and its anomalies) drives the selection and control of the trenchless method.
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Learn more about Haley & Aldrich’s Associate Geologist, Scott Anderson, and discover how we help our industrial clients to maintain compliance with their environmental liabilities.