The axial and lateral monotonic and cyclic behavior of helical pile foundations was investigated and new helical screw systems suitable for seismic loadings were developed. More than one hundred full scale field load tests were conducted on instrumented helical ...

This manual embraces both construction and design of drilled shafts, and addresses the following topics: applications of drilled shafts for transportation structure foundations general requirements for subsurface investigations construction means and methods ...

The use of base grouting (tip grouting) to enhance the axial capacity of drilled shaft foundations can achieve improvements in economy and reliability for many types of projects and soil profiles. Recent experiences on a range of different construction projects ...

Two drilled shaft foundations were subjected to axial load tests in order to measure the influence of drilling fluid on performance. Other than the differing drilling fluids, the shafts were constructed with great care to ensure identical conditions. The results ...

Design of piles requires understanding of how load is transferred from pile to soil and, less obvious but equally important, from soil to pile.

<p>This manual provides guidelines concerning the planning, conduct and interpretation of results of lad tests performed on driven piles and drilled shafts.</p>

The Federal Highway Administration (FHWA) is undertaking a study of bearing capacity of piles in sand. Several individuals have been contracted to predict the capacity of a specific size pipe pile based on soil information provided by the FHWA. The predictions ...