Proceedings of the Deep Mixing 2015 Conference, (DFI)
Utilizing Real-Time Data and Statistical Analysis for Wet Soil Mixing: A Case History
Sunil Arora, P.E., Hayward Baker Inc., United States; Lisheng Shao, Ph.D., P.E., G.E., Hayward Baker Inc., United States; Chris Conkle, P.E., G.E., Geosyntec Consultants, United States
The East Garden Grove - Wintersburg Channel located in Orange County, California, required upgrades along the levees to mitigate potential liquefaction and lateral spreading hazards. The Orange County Public Works designed soilcrete columns constructed between two rows of steel sheet piles along both sides of the channel between Graham Street and Warner Avenue (approximately 2,500 ft), and along an approximately 2,000-ft-long stretch of the south levee. The earthen embankment, approximately 13- to 15-ft high and damaged significantly by erosion, was then excavated to widen the channel to increase the channel flood conveyance capacity. The site is located within the Los Angeles Basin, underlain by several thousand ft of marine sedimentary strata. Uncontrolled fill materials were encountered to approximately 10 ft below ground surface, underlain by tidal and flood plain deposits. Groundwater was encountered at sea level, which is approximately 10 ft below grade. This paper will discuss site soil conditions, and the construction and quality control of soilcrete columns constructed by wet soil mixing; also, the paper will introduce the Drilling Index (DI) as a measurement tool, similar to the cone penetration test (CPT), to evaluate the soil strength in more detail. Finally, the statistical analysis of soil mixing strength distributions for the project quality control will be presented.
|article #2044; publication #1013 (DM-2015)|