Excavation Support Design

GZA provides excavation support design for underground construction projects in urban, transportation, utility, marine, and infrastructure settings. Our engineers develop project-specific systems based on documented geotechnical conditions, structural requirements, adjacent infrastructure, groundwater conditions, and proposed construction sequencing.

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From shallow utility excavations to deep urban excavations and cofferdams for bridge construction, GZA designs temporary and permanent support-of-excavation systems. Our multidisciplinary approach combines geotechnical engineering, structural analysis, construction engineering, and finite element modeling to evaluate site constraints and design requirements.

Services include soldier pile and lagging walls, secant pile walls, tangent pile walls, sheet pile walls, slurry walls, soil mix walls, soil nail walls, internally braced excavations, tieback-supported excavations, anchored walls, cantilever walls, and other retaining-wall systems.

GZA also provides dewatering system design, groundwater management, instrumentation and monitoring services, deformation monitoring, construction-phase observations, and engineering evaluations based on documented field conditions.

Expertise

  • Internally Braced Excavations
  • Tieback-Supported Excavations
  • Tie-Rod and Deadman-Supported Excavations
  • Soldier Pile and Lagging Walls
  • Secant Pile Walls and Tangent Pile Walls
  • Soil Mix Walls
  • Sheet Pile Walls
  • Slurry Walls
  • Soil Nail Walls
  • Anchored Walls
  • Cantilever Walls
  • Mechanically Stabilized Earth Walls
  • Cofferdams
  • Dewatering Systems
  • Finite Element Modeling
  • Instrumentation and Monitoring Services
  • Deformation Monitoring

Related Focus Areas

Geotechnical Instrumentation & Monitoring

GZA delivers comprehensive instrumentation and monitoring programs that combine field expertise with advanced technology. Services include geotechnical, structural, environmental, and remote monitoring systems supported by cloud-based dashboards, and automated alerts, automated reporting.

Construction Engineering

GZA’s Construction Engineers know structures. Heavy Civil, industrial, commercial, residential, waterfront, temporary, old or new construction – we understand how structures go together, how to temporarily support them, how to put them up, and how to take them down, in a practical, economical way...

Deep Foundation Testing

GZA has been in performing non-destructive testing on both large and small deep foundations projects, both on land and offshore, since the 1960’s.

Environmental Monitoring

During construction, observation of air quality, noise, and vibration can reduce the risk of 'cease and desist' orders, support worker health and safety programs, and reduce the risk of damage to adjacent structures.

Groundwater Control

Dewatering systems are often an essential component of a project's design, especially in congested urban areas which could have a significant impact on the soil condition at adjacent properties.

Pre- and Post-Construction Structural Condition Surveys

GZA provides pre-construction condition surveys and post-construction condition survey services to document visible conditions at adjacent structures and properties. Survey records provide a reference for evaluating reported changes or damage claims associated with construction activities. Related...

Pre-Bid & Value Engineering

GZA assists contractors with creative approaches to construction, strengthening your bid by providing economical and constructible solutions.

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Rasim Tumer has been with GZA since December 2006. Prior to joining GZA, he worked as a Structural/GeoStructural Engineer for…

View Details for Rasim Tumer

Rasim Tumer

Principal

781-278-5884

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