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Telescopic Pile Analysis

1.0 Introduction

In this tutorial the same pile of Tutorial 9 is analyzed for a lateral load of 1000 kN and a vertical load of 4000 kN using the program RSPile.

Finished Product:

The finished product of this tutorial can be found in the Tutorial 10 - Telescopic pile analysis under lateral and axial load.rspile2 data file. All tutorial files installed with RSPile can be accessed by selecting File > Recent Folders > Tutorials Folder from the RSPile main menu.

2.0 Model

Open the Tutorial 9 - Telescopic Drilled Pier with Bell.rspile2 data file by selecting File > Recent Folders > Tutorials Folder from the RSPile main menu.

2.1 PROJECT SETTINGS

  1. Select Analysis > Project Settings (CTRL + J) or click on the Project Settings icon in the toolbar.
  2. Project Settings dialog

  3. Go to the Pile Analysis tab and change the Pile Analysis Type to Individual Pile Analysis > Axially / Laterally Loaded.
  4. Go to the the Advanced tab to choose your accuracy tolerance and other solution controls:
    • Pile Segments = 50
    • Convergence Tolerance = 0.0001
    • Number of Iterations = 100
    • Reinforced Concrete Slices = 100
    • Use Method of Georgiadis Layering Effect = Yes
  5. Click OK to close the dialog.

3.0 Soil

3.1 DEFINE SOIL PROPERTIES

The soil layers are the same as Tutorial 9 but the soil models required for Lateral Analysis and Axial Analysis are chosen with the suitable parameters as follows:

  1. Select Soils > Define Soil Properties to open the Soil Properties dialog.
  2. Edit the soil properties as follows.

For the Clay:

  • In the Lateral tab select the soil type as the Submerged stiff clay model and keep the same undrained shear strength.

Soil Properties Dialog - Clay - Lateral

  • In the Axial tab select the soil type as the Drilled Clay model, while copying the calculated unit skin resistance and end bearing resistance from the previous tutorial results: 70 and 900 kPa respectively.

Soil Properties Dialog - Clay - axial

For the Sand:

  • In the Lateral tab select the soil type as the Sand model and keep the friction angle the same at 38.

Soil Properties - Dense sand - lateral

  • In the Axial tab select the soil type as the Drilled Sand model, while copying the calculated unit skin resistance and end bearing resistance from the previous tutorial results: 32 and 9600 respectively.

Soil Properties - Dense sand - axial

4.0 Piles

4.1 DEFINE PILE SECTION PROPERTIES

The pile is defined similarly as it is in Tutorial 9. A minor update must be made to the Pile Section Properties.

  1. Select Piles > Pile Section Properties in the menu.
  2. Define Pile Section

  3. The pile type is chosen as Elastic in the Axial/Lateral tab.
  4. Change the Young’s modulus to 35000000 kPa for the three segments.
  5. Click OK to close the dialog.

4.2 EDIT PILE TYPE

The pile editor will show the same built-up pile definition as in Tutorial 9. To view the Pile Type Editor select Piles > Edit Pile Type.

Edit Pile Types dialog.

4.3 EDIT PILE - LOADING

Next we will edit the pile to apply and define the loading:

  1. Right click on the pile in the plan view and select Edit Pile.
  2. Go to Loading tab and click on the Green plus button Green Plus button to add a Loading Property.
  3. Enter the follow properties:
  • Loading Property = Loading Property 1
  • Static
  • Load Factor Profile = None
  • Loading Direction = General
  • Loading Type
    • Shear X = 1000 kN
    • Force Z = -4000 kN

Click OK to close the dialog.

5.0 Results

5.1 COMPUTE

Select File > Save As to save the file with a new name and then compute the file by clicking on the Compute icon Compute icon in the toolbar.

5.2 RESULTS

The results of the pile analysis will be similar to what you have learned in previous tutorial for individual pile analysis.

Results


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