Project Description
Client: City of Los Angeles
Location: Los Angeles, CA
Project: 182nd Street Bridge Expansion and Seismic Retrofit
The 182nd Street Bridge was built in 1964, and was recently upgraded to meet the current seismic codes. The Bridge is 35-foot-wide and 226 feet in length, a 3-span (max span 74 feet) pre-tensioned concrete I- Girder construction, simply-supported on concrete pile foundations.
The Challenges
Albus & Associates, Inc., was retained to evaluate and redesign a deep foundation system using 48-inch-diameter Cast-in-drilled-hole (CIDH) piles as part of the value engineering (VE) services. We performed analyses for vertical and lateral pile capacities under static and seismic conditions.
Our services also included observation, testing and consultation during construction of eight CIDH piles, four at each abutment. Our staff logged the drilled holes to confirm subsurface conditions and to verify design assumptions. We observed the installation of inspection pipes and concrete placement in accordance with project plans and specifications. After concrete placement, we performed Gamma Gamma Logging (GGL) services through the pre-installed inspection pipes to verify concrete quality and pile integrity, and prepared a construction report summarizing our findings and test results.