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Representative highlights of Willdan Geotechnical's recent industrial and commercial projects are presented below.
Client: City of Mission Viejo, California
Project: Interstate 5 Soundwall
Willdan Geotechnical performed geotechnical investigation for proposed soundwalls along Interstate 5. The fieldwork required site inspection, clearance with homeowners (as boring locations were in their backyard), soil sampling and logging of 6 bucket auger borings using a mini rig, 2 hand dug borings, geologic cross sections, and recommendations for foundation design considering vertical and lateral load supporting capacities.
Client: City of Laguna Hills, California
Project: Aliso Creek Sound Wall Feasibility Study
For two segments of sound walls proposed behind residential backyards and on top of slopes, Arroyo investigated surficial and global stability of the slopes as well as the foundation design. Six soil borings were performed to evaluate subsurface soil and bedrock conditions. Using the developed geologic cross sections, detailed analyses were conducted to assess the slope stability. The most economical foundation type was recommended and the foundation responses under the specified vertical and lateral loads were determined.
Client: 3161 Michelson Drive LLC
Project: Parking Structure No. 2 in Park Place
For the proposed 6-story parking structure in the City of Irvine, California, with a subterranean half-level, Willdan Geotechnical performed field investigation (drilling, sampling and logging of nine borings to evaluate subsurface soil conditions to a maximum depth of 70 feet), a probabilistic seismic hazard analysis to evaluate the ground motion, and engineering analyses to provide recommendations for foundation design and construction. The presence of thick compressible clayey alluvium required driven 14-inch square precast prestressed concrete piles.
Client: Diabetic Youth Services
Project: Camp Conrad-Chinook
The project constructed 13 one-story cabins on the 18-acre campsite. The investigation included fieldwork, a laboratory testing program, recommendations for seismic design of proposed structures in accordance with UBC design criteria, discussions of the corrosivity and chemical attack potential of onsite soils, and recommendations for general site grading including subgrade preparation, fill placement and site drainage.
