原文传递
SPECIFICATION AND DESIGN CRITERIA FOR THE
CONSTRUCTION OF CONTINUOUS FLIGHT AUGER
PILES IN THE HOUSTON AREA
| 题名： | SPECIFICATION AND DESIGN CRITERIA FOR THE CONSTRUCTION OF CONTINUOUS FLIGHT AUGER PILES IN THE HOUSTON AREA |
| 作者： | K. M. Hassan M.W. O’Neill and C. Vipulanandan |
| 关键词： | piles, augercast, continuous-flight-auger, lateral load, sound walls, clay, construction, specifications, design |
| 摘要： | Five continuous-flight-auger piles were installed in a stiff clay soil following standard practice. Four of these piles were later subjected to lateral load tests to large displacements. The length and diameter of the test piles were varied to investigate the effect of these parameters on pile performance. The fifth pile was used as a reaction for the four test piles. During installation, incremental grout take and upper and lower bound grout pressures were monitored continuously, and grout samples were acquired and tested. Cross-hole ultrasonic tests were performed on the piles following installation to ensure that the piles were structurally sound. A simple design model, the characteristic load model, was adapted from the literature, and soil parameters for that model were determined from geotechnical data available at the test site (the University of Houston National Geotechnical Experimentation Site, partially supported by the Federal Highway Administration) and by back-analysis of the loading test results. The final design model is intended for use in designing foundations for sound wall structures and is capable of predicting the deformation of the pile under a combined shear and moment load, as well as the loads that produce cracking in the pile. A provisional, detailed construction specification is presented that is based on specifications in effect in Texas and other states for continuous flight auger piles, current practice and observations made during the performance of the research. |
| 报告类型： | 科技报告 |
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