Full Scale Cyclic Large Deflection Testing of Foundation Support Systems for Highway Bridges. Part I: Drilled Shaft Foundations

摘要

Cast-In-Drilled-Hole (CIDH) shafts are a commonly used support element for bridges and highways in California. The lateral response of CIDH systems are controlled by the properties of the CIDH shaft and the soil that surrounds it. Effective design of these systems requires observation and analysis of the interaction between shaft and soil through full-scale field testing. This document describes four of a sequence of five tests sponsored by the California Department of Transportation (Caltrans) and managed by the University of California, Los Angeles (UCLA). The first test - a six foot diameter shaft in a flagpole configuration - was completed in 2001 and the results are presented in Wallace et al. (2001). The tests that are the subject of this report consist of a two foot diameter flagpole specimen, a two foot diameter fixed-head specimen, a group of nine two foot diameter shafts, and an abutment wall.