PileAXL - Design and analysis for single piles under axial loading
PileAXL is a program that analyzes the behaviour of single piles under axial loading applied at the pile head for both onshore and offshore engineering problems.
Comprehensive analysis models available for ultimate shaft resistance and end bearing resistance
PileAXL provides a wide range of analysis models for determining ultimate shaft and end bearing resistance of both driven and bored piles for cohesive soils, cohesionless soils and rock.
Easy parameter input for various soil and rock materials
Various soil parameters for different axial capacity calculation methods can be easily input by the users. The program can automatically determine the default parameters based on the material type and strength. Advanced options are also available to the users who want to have more control over the adopted analysis method or who have site-specific design parameters for the problems.
Graphical presentation of axial load settlement curve at pile head
Load settlement curve at the pile head is displayed together with the tabulated results. The applied axial load and the resulted pile head settlement are also shown on the same graph for the users' review and reference.
Nonlinear T-Z curve generation along the pile length and graphical presentation
Generation and graphical presentation of nonlinear T-Z curves along the pile length for various soil types such as cohesive soils, cohesionless soils and rocks according to the pile installation type.
Limit state design approach - ASSHTO
PileAXL supports the limit state design approach - ASSHTO (American Association of State Highway and Transportation Officials). Various resistance factors as per the design requirements in ASSHTO code for shaft resistance, end bearing resistance, uplift resistance can be specified by the users.
Limit state design approach - Eurocode 7 UK Annex
PileAXL supports the limit state design approach - Eurocode 7 UK Annex (DA1). Partial factors related to shaft resistance, base resistance, tensile resistance and total resistance and model factor as required by Eurocode 7 for UK Annex are built into the program and are automatically used to calculation the pile design resistance.
Limit state design approach - Eurocode 7 Others
PileAXL supports the limit state design approach - Eurocode 7 Others. Partial factors related to shaft resistance, base resistance, tensile resistance and total resistance and model factor as required by Eurocode 7 can be specified by the users. This option offers more flexibility when Eurocode 7 is adopted in the design.
Fast and efficient creation of axial capacity and settlement analysis problem for single piles
The user-friendly interface enables the user to efficiently create the analysis input file for single piles under axial loading with a logical workflow.
A simple way to access and view all the analysis results on one window dialogue
All analysis results such as shaft resistance, end bearing resistance and pile axial capacity including design strength values based on various selected design standards are displayed on one window dialogue. It is easy for the users to switch among different result plots and copy or print if required.
Both Load Transfer Method and Fleming's Method are available in PileAXL for Pile Settlement Analysis
PileAXL provides two different methods for the pile settlement analysis: (1) Load Transfer Method with using t-z and q-w curves and (2) Fleming's approach (Fleming 1992).
Lateral capacity analysis for short piles
A simple tool - SPileLAT is available in PileAXL for lateral capacity analysis of short piles. It can be used to determine the capacity of the short piles under later force and bending moment applied at the pile head based on Broms method for cohesionless and cohesive soils and Hong Kong Geoguide method for rocks. Three different design approaches are available in SPileLAT: (1) Allowable working load design; (2) Limit state design - ASSHTO and (3) Limit state design - Australian Piling Standard 2159-2009.
Allowable working load design approach
In allowable working load design approach, partial factors related to shaft resistance, base resistance, tensile resistance and total resistance can be specified by the users.
Limit state design approach - AS 2159-2009
PileAXL supports the limit state design approach - Australian Standard - AS 2159-2009. Various geotechnical strength reduction factors for the compression and tension resistance can be specified by the users.
Limit state design approach - Eurocode 7 Singapore Annex
PileAXL supports the limit state design approach - Eurocode 7 Singapore National Annex. Partial factors related to shaft resistance, base resistance, tensile resistance and total resistance and model factor as required by Eurocode 7 for Singapore National Annex are built into the program and are automatically used to calculation the pile design resistance.
The option of "Explicit Verification of SLS" can be checked or unchecked. The corresponding partial factors will be automatically updated as per code requirement.
Complete Feature List
Standard window-style dialogs, push buttons, drop menus, list boxes, EXCEL-like data grid cells, slide bars, radio buttons, check boxes and toolbars can be accessed in the program;
Analysis methods for driven piles include (1) American Petroleum Institute Method (API RP2A), (2) U.S. Army Corps of Engineers Method (USACE), (3) Imperial College Pile Method (ICP) and (4) User-defined method;
Analysis methods for bored piles or drilled shafts include (1) FHWA Clay, (2) FHWA Sand, (3) FHWA Gravelly Sand, (4) FHWA Gravels, (5) FHWA Rational Beta Method (Kulhawy and Chen 2007) and (5) General rock based on the recommendations from FHWA publication entitled "Drilled Shafts: Construction Procedures and LRFD Design Methods" (FHWA-NHI-10-016);
Ultimate end bearing resistance within the layered soils is determined by Meyerhof (1976)’s approach with considering the influence effects of upper and lower soil layers;
Two different approaches are provided by the program for the pile settlement estimation: (1) Load transfer method and (2) Fleming's method;
For the load transfer method, nonlinear T-Z curves and Q-W curves are automatically generated for various soil types such as cohesive soils, cohesionless soils and rocks according to the pile installation type;
Different pile Cross Section Types such as circular section, rectangular section, steel H-section, steel pipe section, octagonal section and user-defined section can be selected by the user. Plugged and unplugged options are available to the steel H-section and steel pipe section;
Six different design approaches are available in PileAXL for the axial capacity design based on various code and design standard requirements:
• Allowable working load design approach;
• AASHTO (American Association of State Highway and Transportation Officials);
• Eurocode 7 – UK National Annex;
• Eurocode 7 – General Requirements;
• Eurocode 7 – Singapore National Annex; and
• Australian Standard – AS 2159 -2009
A well-designed Result Output Dialog is provided for the user to view all the analysis results graphically. Switching among different results is very straightforward. Detailed analysis results are presented in EXCEL-like format and can be easily selected and copied into the third-party program such as EXCEL for further processing;
An Interactive Graphical Interface for pile and soil layer geometry input is provided. Important changes in the input data such as pile length, the number of soil layers, soil layer name, soil layer thickness, soil layer colour, analysis model type, water table position, certain soil parameters and pile loading will be automatically updated in the main graph. It is very convenient for the user to visually view the input change; and
Offshore driven pile foundations can be analysed by the API method, ICP Method, Fugro Method and UWA method included in PileAXL program. The user can benefit from the comprehensive options provided by PileAXL for offshore pile foundation design.
Negative skin friction option is available in PileAXL for the consideration of negative skin friction effects on the pile axial capacity and settlement.