Geotechnical Construction Sequence Modeling
Subsurface Structure Model for a Bridge Abutment on a Landslide.
Landslide Technology is often involved with large, complex projects where the sequencing of geotechnical elements is critical for temporary and long-term stability of landslides, rock slopes, and other unstable ground. These elements are also important to maintain safe public passage through active work areas.
Geotechnical design recommendations can affect a Contractor’s chosen sequencing, means, and methods. This can lead to costly delays and/or redesign efforts, particularly for excavation shoring and foundations, soil slope stabilization, and rock slope mitigation. To avoid this situation, LT has successfully coupled our understanding of access requirements, staging, and work sequencing to identify an anticipated construction sequence in the contract drawings. We typically provide sequencing guidelines in the plans, which must be met to ensure interim stability requirements are maintained. These combined elements provide the contractor a carefully-considered, workable sequence as well as guidelines for schedule flexibility. For complex projects, 3D modeling can be used to demonstrate the anticipated sequence to the public, stakeholders, and bidders (as shown above).
During construction, our firm is able to work with the owner and contractor to develop a workflow that is efficient and flexible. This allows the work to adapt to the conditions and production rates actually encountered during construction. By considering a preliminary sequencing , the actual construction sequence can be rapidly modified to fit field conditions. This helps control costs by providing flexibility to deal with ground condition disputes, which are then less likely to become claims. With involvement during construction, we are also able to document actual conditions, counsel the Owner on the validity of claims, and describe how the contractor’s chosen sequence may have influenced the outcome.
Geotechnical design recommendations can affect a Contractor’s chosen sequencing, means, and methods. This can lead to costly delays and/or redesign efforts, particularly for excavation shoring and foundations, soil slope stabilization, and rock slope mitigation. To avoid this situation, LT has successfully coupled our understanding of access requirements, staging, and work sequencing to identify an anticipated construction sequence in the contract drawings. We typically provide sequencing guidelines in the plans, which must be met to ensure interim stability requirements are maintained. These combined elements provide the contractor a carefully-considered, workable sequence as well as guidelines for schedule flexibility. For complex projects, 3D modeling can be used to demonstrate the anticipated sequence to the public, stakeholders, and bidders (as shown above).
During construction, our firm is able to work with the owner and contractor to develop a workflow that is efficient and flexible. This allows the work to adapt to the conditions and production rates actually encountered during construction. By considering a preliminary sequencing , the actual construction sequence can be rapidly modified to fit field conditions. This helps control costs by providing flexibility to deal with ground condition disputes, which are then less likely to become claims. With involvement during construction, we are also able to document actual conditions, counsel the Owner on the validity of claims, and describe how the contractor’s chosen sequence may have influenced the outcome.
Representative Projects:
Landslide Technology has provided 3D modeling services for construction sequencing on the following projects:
- Washington Park Reservoir Construction, Portland, Oregon
- Captain William Henry Moore Bridge, Skagway, Alakska
- Sellwood Bridge, Portland, Oregon
- Yale Dam Rock Block Removal, Cougar, Washington
- MT-200 Tieback Retaining Wall, Missoula, Montana
Services Offered:
- 3D modeling of construction elements and illustration of potential sequencing
- Flexible options for construction sequencing
- Geotechnical Observation Method
- Construction management services for geotechnical aspects