Improvement for Underground Construction: The Good, the Bad and the UglyGround Improvement for Groundwater ControlDepression at Nesbitt DamArgentine Shaft Saviour170 Feet Below ColumbusESA’s SEM ChallengeGround Stabilization for Urban TunnelingGeotechnical Solutions: An alternative Approach to Soft Ground Tunneling

Ground Improvement for Groundwater Control

This informative article discusses how understanding of the behavior of soils and groundwater is crucial to allow the right ground improvement choices to be made and presents available methods and their suitability to site-specific conditions.

Depression at Nesbitt Dam

An in-depth presentation of the emergency response dewatering and grouting required to remediate and restore stability to an earthen dam structure.

Argentine Shaft Saviour

When a deep shaft under construction for The Sistema de Potabilización Area Norte potable water system in Buenos Aries experienced persistent ground and water inflow despite several remediation attempts, Moretrench’s ground freezing expertise was called upon to provide effective earth support and groundwater control, allowing the shaft to be successfully completed.

170 Feet Below Columbus

This cover feature article discusses the grouting program used to aid the sinking of deep shafts through highly variable karst geology for the OSIS Augmentation and Relief Sewer (OARS) project in Columbus, OH.

ESA’s SEM Challenge

A discussion of the design and construction challenges of the ground freezing program used to ensure problem-free mining of the East Side Access Northern Boulevard Crossing.

Ground Stabilization for Urban Tunneling

This feature article explores the geotechnical methods available to facilitate soft ground, mixed face and shallow-cover rock tunneling, and associated work such as deep access shaft construction, under dense urban conditions.