By Zhongxuan Yang, Richard Jardine, Wangbo Guo, Fiona Chow
A accomplished Database of assessments on Axially Loaded pushed Piles in Sands stories the severe have to increase larger load-test databases for piles pushed in sands. the main caliber parameters, inhabitants of present entries and reporting codecs are defined ahead of supplying initial effects got from comparisons among axial capacities calculated by way of quite a few predictive techniques and location measurements. This ebook additionally indicates that the "simplified" and "offshore" ICP and UWA versions proposed by way of a few practitioners are over-conservative and that their use can be discontinued. the recent pile potential and stiffness database bargains a vast scope for comparing capability prediction biases with regards to a variety of soil and pile parameters. Submission of extra top of the range exams for inclusion in frequently up to date models is encouraged.
- Presents a accomplished and up to date database for piles pushed in predominantly silica sands
- Features reports of the layout methods for pushed piles in sand
- Assesses the functionality of assorted mainstreams layout systems utilized for piles pushed in sand
- Provides complete info of case histories of pile load tests
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Additional info for A Comprehensive Database of Tests on Axially Loaded Piles Driven in Sand
4 AGING TRENDS We consider next the information that can be gleaned from the ZJU-ICL database regarding potential effects of age on the axial capacities of piles driven in sand when subjected to first time testing. 17 present this information as ratio against age of measured-to-calculated capacity (Qm/Qc the inverse of Qc/Qm) evaluated by various design methods, considering total, shaft, and base capacity, respectively. The piles with unspecified ages are not plotted. The high degree of scatter displayed by the API predictive method masks the time dependency of total and shaft dependency that is clearer with all of the “CPT-based” method plots.
Ideally, good measurements of in situ density and interface shearing angles should also be available. , carbonate sand sites are ignored. 1 D have developed. 1 Tests equipped with strain gauges and tension tests to failure are particularly valuable for isolating the shaft-to-base capacity splits from compression tests. offer information on driving method, pile embedment, diameter, tip end conditions, wall thickness, and material. Ideally, the pile driving records and pile age after driving should also be available.
Interface fricƟon angle esƟmated with PSD, and soil unit weight applies default value. 1 An example of description of test site and pile load tests (a) Site ID No. 3: K27, Wuhu, China. Yang et al. (2015a). (b) Pile ID: Wuhu K27-1. 2 Geographical distribution of combined ZJU-ICL database. be accompanied by an adequate site investigation including a complete CPT profile from a nearby location, soil descriptions, information on groundwater levels and sand particle size distribution. Ideally, good measurements of in situ density and interface shearing angles should also be available.
A Comprehensive Database of Tests on Axially Loaded Piles Driven in Sand by Zhongxuan Yang, Richard Jardine, Wangbo Guo, Fiona Chow