Tutorial 3 shows you how to design a single pile according to the requirements of Eurocode 7. The worked example is taken from Chapter 13 of the book “Decoding Eurocode 7” by Bond and Harris (2008).
Ground conditions comprise 8 m of medium strength sandy CLAY overlying medium dense gravelly SAND. The clay has characteristic undrained strength of 45 kPa and characteristic weight density of 18.5 kN/m3. The sand a characteristic angle of shearing resistance of 36̊, zero effective cohesion, and characteristic weight density of 20 kN/m3. The sand’s constant-volume angle of shearing-resistance is 33̊.
Groundwater at the site is at 1 m depth and skin friction above groundwater will be ignored.
The pile studied is a 10 m long, 400 mm square pile made of concrete with characteristic weight density of 25 kN/m3.
Vertical loads of 650 kN (permanent) and 250 kN (variable) will be applied to the pile.
You want to determine the minimum pile length required by Eurocode 7 according to the National Annexes published in Ireland and in the United Kingdom.
Full hand calculations for this example are given as Examples 13.1 and 13.2 in Bond and Harris (2008).
This tutorial is written for users of the Standard, Enterprise, and Trial Editions of Repute 2 only. Users of the Professional Edition should look at Tutorials 4-6.
In Step 1, you will use the Project Wizard to enter project information, select design standards, and create a scenario to represent short-term conditions.
In Step 2, you will use the Borehole Wizard to create a borehole containing the clay and sand layers.
In Step 3, you will add a water table to the scenario.
In Step 4, you will create a pile and specify its cross-section and concrete grade.
In Step 5, you will use the Action Wizard to create the forces applied to the pile.
In Step 6, you will use the Calculation Wizard to create a calculation and specify the design standard to use in that calculation.
In Step 7, you will specify precise details of how you want the calculation to be performed.
In Step 8, you will perform the calculations and review the results.
In Step 9, you will create a second calculation, identical to the first but based on the UK National Annex to Eurocode 7.
In Step 10, you will close (and optionally save) the project.
If Repute is not already running, double-click on the Repute icon on Windows’ Desktop to start the program. Once the splash screen has disappeared, Repute displays its Welcome page.
If you have an existing project open, click Close on the program’s Application menu. (You will be prompted to save your work if you have not already done so.)
Now you are ready to start the tutorial.
Step 1 - create the project