Appendices (recommended content to include in a full deployment of Geoss Guidelines) A. Typical correlation tables for SPT/CPT to unit shaft and end-bearing capacities (with local calibration notes). B. Example pile driving criterion tables and refusal definitions for common hammers. C. Sample borehole and pile log templates. D. Standard forms for pile daily records, test reports, and completion certificates. E. Specification clauses (example) for inclusion in tender documents covering scope, testing, acceptance criteria, tolerances, and remedial actions. F. Example QA/QC plan and monitoring templates. G. Quick-reference flowchart: decision tree for pile-type selection based on soil profile, loads, and site constraints.
The guidelines also address construction problems and possible mitigation measures, discussing ways to avoid problems or mitigate their effects throughout the pile installation process.
The provides a more objective assessment system for identifying rock during bored piling works. Key features include:
While "GEOSS" may refer to regional geotechnical codes (e.g., inspired by Eurocode 7 or national annexes), this paper synthesizes universal principles: Appendices (recommended content to include in a full
Bored piling in rock—particularly in variable or weathered rock formations—requires consistent and accurate identification of rock types, quality, and socket lengths. Disputes between designers and contractors often arise from differing interpretations of rock encountered during excavation.
Without standardized local practices, each project would rely on fragmented individual expertise, leading to inconsistent quality, disputes over rock identification, unanticipated construction delays, and potential safety compromises. The GEOSS guidelines address this by providing that:
The festival of colours, celebrating spring and camaraderie. CPT-based design methods for offshore piles
Minimizing differential settlement in soft soils.
This article outlines these best practices, emphasizing site investigation, design methodologies, construction techniques, and quality control. 1. Introduction to Pile Foundations
The guidelines provide standardized criteria for rock identification during boring, reducing contractual disputes and ensuring that pile socketing into competent rock is properly verified. As one practitioner notes, “Consultants ignore the end bearing of piles usually. Pile socketing into competent rock is the norm”. and time effects on pile capacity.
: Typical allowable pile top settlements under load tests are: under 1.5 times the working load. under 2.0 times the working load. Unit Resistance
International Society for Soil Mechanics and Geotechnical Engineering Load Test Criteria Allowable pile top settlements are generally limited to at 1.5 times the working load and at 2.0 times the working load.
The Norwegian Geotechnical Institute (NGI) focuses on specialized topics including pile driving effects on pore pressure build-up, CPT-based design methods for offshore piles, and time effects on pile capacity. NGI’s work is valuable for research and specialized applications but does not provide the comprehensive, jurisdiction-specific regulatory framework characteristic of GEOSS guidelines.