Roads, transit, and utilities
Roads, transit structures, and buried utilities can limit drilling locations, allowable movement, and the work area available for construction.
Market
Transportation and Infrastructure Structural Engineering
Structural support for tunnels, shafts, and crossings beneath or beside streets, transit facilities, and other public infrastructure.
Discuss your projectEngineering for your project
Shoring for tunnels, shafts, and infrastructure work
Underground infrastructure work often takes place in narrow work zones near roads, transit facilities, and utilities that remain in service. Temporary support needs to fit the excavation and the access required for crews, equipment, and materials.
Cefali & Associates has designed support for the Metro 7th Street Station passage and temporary shoring for the Wallis Annenberg Wildlife Crossing. These projects involved different construction constraints, from excavation beneath an active street to support for bridge and earthwork stages.
Design and construction
What affects the shoring and foundations.
Confined construction
Low overhead clearance, limited equipment reach, and narrow work zones can affect installation methods and connection details.
Temporary and permanent construction
The support system needs to work at each excavation stage and leave room for the permanent tunnel, crossing, or utility structure.
Our experience
Related projects
Structural engineering for transportation and infrastructure projects involving tunnels, shafts, earth retention, and constrained access.
Metro BLOC Tunnel
For the Metro BLOC Tunnel, a system of beams and columns was installed as excavation advanced toward the station beneath an active roadway and public stairway.
Wallis Annenberg Wildlife Crossing
At the wildlife crossing, temporary shoring supported early bridge and abutment work before the southerly earthwork was complete.
Additional projects
Related services
Shoring and foundation engineering.
Our services cover excavation support, retaining systems, and specialty foundations. The right combination depends on the ground conditions, existing structures, and work you are building.
Planning guides
Read about the constraints behind this work.
Deep Excavation Near LA Metro: Shoring Beside Tunnels and Transit FacilitiesHow nearby Metro tunnels, tieback limits, demolition, and construction access affect shoring for a Los Angeles basement, with the Wilshire Grand example.Orem Utility Pits: Shoring Around Utilities, Foundations, and Working SpaceA utility pit needs room for support and installation as well as the finished chamber. See how nearby utilities and foundations shape an Orem excavation.
Discuss your project
Tell us what you are planning.
Send the plans and site information you already have. Include your schedule, known access limits, and the engineering work you need help with.
Send project informationUseful information to send
- Alignment and excavation sections
- Records for nearby public structures and utilities
- Proposed construction sequence and access plan
Project photos
Portfolio
Additional projects
01ANAHEIM CONVENTION CENTER
Project overview
Project photos from Cefali & Associates.
02COLORADO RIVER AQUEDUCT MICROPILES - Construction Services
Project overview
Project photos from Cefali & Associates.
03EAST COUNTY DETENTION CENTER
Project overview
Project photos from Cefali & Associates.
04EL MORROW RESERVOIR
Project overview
Project photos from Cefali & Associates.
05FORT MOORE
Project overview
Project photos from Cefali & Associates.
06SILVERLAKE PHASE III
Project overview
Project photos from Cefali & Associates.
07TOYON TANKS
Project overview
Project photos from Cefali & Associates.
08WALLIS ANNENBERG WILDLIFE CROSSING
Project overview
WALLIS ANNENBERG WILDLIFE CROSSING The National Park Service researched transportation infrastructure's effect on wildlife habitat. The 101 Freeway creates a barrier that isolates animal populations within the Santa Monica Mountains. The Wallis Annenberg Wildlife Crossing was developed to restore habitat connectivity across the ten-lane freeway and an adjacent access road at a location where protected lands exist on both sides of the corridor. Images of mountain lions as potential crossers adorn the project website promoting the completion of the crossing. Our firm provided engineering services related to temporary earth shoring design at the base of the site during early construction phases that allowed the bridge and abutments to be constructed ahead of the southerly earthwork. Our services were performed for the General Contractor, C.A. Rasmussen, and the shoring was installed by Malcolm Drilling. The shoring design used Caltrans available beam supply and allowed height to be added to the top of the shoring as grading operations backfilled a slope up to the abutment level.
