Piling ECC Computation Tutorial

Define the Pile Grid Layout

We have been given the following Grid Layout where piles are to be placed.

Ezicad/EziPile allows you to define any regular or irregular grid and define custom label headings for each grid line. The software also allows you to snap piling symbols onto any grid intersection line.

Please note that the terms Ezicad and EziPile are interchangable. Ezicad is the base CAD program. EziPile are some more specialized commands that work in conjunction with Ezicad. We only have the one program.

Typing "Grid" into the Ezicad command line brings up the dialog that allows you to define your custom grid. The dialog is shown below.

The X and Y values are the absolute position of the origin of the two axes. The initial values displayed are the clicked position of the grid. We have set the origin to be the zer point 0,0

The Text Height is the unit height of the text put out. In this example we are working in mm's so 750mm is a good size.

Overhang - The grid is extended left and right, up and down by this value. If you don't want an overhang set this value to 0.

Axis Bearing - The bearing of the axis. 90 degrees is horizontal, 0 is up the page. The two bearings do not have to be at 90 degrees. They can be at any angle to suit the architectual design.

Axis Color - Brings up a color dialog to set the axis color.

Axis Ltype - This still needs to be implemented.

Heading Distance Table - fill in the heading for each line as well as the relative distance from the previous line. Please add in an initial distance of 0. Please refer to the image above for clarification.

Store Data - If you are entering in a complicated grid we suggest that you use this function. It stores away the headings and distances for the two tables.

Read Data - If you go back into the dialog you can read an existing grid if you need to make any corrections

Fill in the table as per the screen shot above. Once you have filled in the values click on the OK button and the grid is drawn in Ezicad.

Click on "View" - "Zoom Extents" and Ezicad will display the calculated grid.

We now have a grid displayed. The grid can be thought of as a smart grid as we can snap our piling symbols/blocks onto the grid intersection points.

Define a Piling Symbol/Block

The Piling symbols that Ezicad uses are standard dwg files that are centred around the 0,0 point. Ezipile looks into the block and uses any circles or intersecting lines such as a cross as the actual pile position for multiple piles

Ezipile ships with a number of predefined symbols for 1,2,3 piles etc. You can edit these dwg files if need be. Any dwg editor including Ezicad can be used to create the symbols.

Some sample symbol piles for 2 and 3 columns are shown below.

Inserting Pile Symbol/Block

It is a two step process to snap onto the piling grid. The Piling symbol must first be entered into the dwg block table. The second step is to then interactively enter the symbols onto the Grid defined.

Importing Piling Symbol

From the "Insert" menu select the "Insert Block (from dwg file)". Ezicad asks you to browse for the dwg and it is entered into the block table for subsequent use.

Insert the blocks P3 and P4 into the block table.

Inserting and Snapping Piling Symbol's

The Piling Symbol is actually entered as a reference. The block reference contains the position, scale, rotation and any associated attributes if applicable. This keeps dwg size more compact.

We will first enter in the P4 block references. Select the "Insert" - "Block Reference" menu item. A dialog is displayed. Select the P4 block name from the drop down combo box. If P4 is not listed you have not imported this symbol into the block table. Enter a scale of 1.0 and rotation of 90.0 is to display the symbol as it was defined.

Move the cursor around. Note that when the cursor passes over a line the cursor changes to a triangular hour glass figure that shows that cursor is snapping to a grid line. When you move to a grid intersection point the cursor changes to a yellow square. If you now left click the block reference is inserted onto the grid point. Click in all the appropriate points. Once you are finished hit the escape key.

We now wish to enter in the triangular Piles that are not rotated. As before click on "Insert" - "Block Reference" and setup the dialog for name of P3, scale of 1.0 and a rotation of 90. Click in the appropriate reference points and hit the escape when finished

We now want to enter in the upside down triangular piles. As before bring up the dialog and enter in a bearing of 270. Click on the grid points as before and hit the escape key when finished.

The diagram below shows the final entry for the upside down triangular piles. Please note the P3 heading for the piles is upside down as expected. If this is an issue you need to create a new dwg block which is upside down to the normal P3 with heading at the right rotation

Importing the Field Data

At this stage you need to get the surveyed data from the field where your party has located the ‘as built location of each of these ‘pile points’.

There are at least 3 ways of getting this data into Ezicad/Ezipile:

This data has been supplied in a file called "pilesurvey.csv". For this tutorial we will show the procedure of importing this data into Ezicad.

Type the command "ImportAscii" at the Ezicad command line. This brings up a series of 3 dialog's that allow you to specify the format of the data to be imported.

Before importing please note that in this example does not have a layer set. In this example we wish for the surveyed points to be placed on the "SURVEYED" layer. To do this follow the procedure

If you fail to preset the layer then points are entered on the current layer. Probably "0". In that case you can enter in the new layer later, select the entered points and set the layer to "SURVEYED".

To import follow the following procedure.

The points are entered into the dwg as a block reference with the appropriate variables stored as attributes. In this case the only attribute to store is the point number. The point number is recommended as a reference but is not necessary. You are prompted for the type of point to display.

You are also prompted for the point size (expect pixel) and the height of the text attributes. In this case the point number. We have entered a point height of 50 and text size of 300 in this case; remembering that everything has been entered in mm's

After zooming any appropriate Zoom's and Pan's we have the following. We have set the points on "SURVEYED" layer to color magenta.

Zooming up around an existing Pile shows the following

Obtain a Displacement Report

The quickest method of determining the compliance, or otherwise, of the job is to obtain a Report.

Type in "PilingReport" into the Ezicad/Ezipile command line. The following dialog is shown

Set the "design" and "surveyed" location. Any designed block references need to be on the layer specified. You may need to select the designed block references and then set the appropriate layer. Make sure the surveyed points are also on the "surveyed" layer. Set the minimum tolerance and the limit. In this example we are using mm's. If everything was in meters then these values would be entered in meters.

Click OK and a report is generated. Ezicad/Ezipile automatically calls notepad or default rtf editor to display.

A short section of the generated report is shown below:

You should use the options available under File in the relevant word processor to save this document with a relevant name. If you wish you can also use the word processor to change the formatting and fonts etc of the report.

If you take a look at the various columns, you will see that the two right hand columns are the ones that can be used to quickly see which piles are in a position that is outside the design tolerance.

Obviously this is also a quick check to ensure that there is no major discrepancy in the coordinate systems used in the field and the office, and if there is more that a few points which have values appearing in the right hand columns you need to have a close look at the data before proceeding.

If, as should be the case at the moment, there are only a few locations where the points have fallen outside the tolerance, you will need to discuss this with the structural engineer to determine whether this is a problem or not.

Most often the engineer will request a plan showing the graphical representation of the direction and distance of the displacements.

Displacement Drawing.

When you are ready to create the displacement drawing you need to choose the required symbol and size and whether text is to be displayed an the size.

Type the command "PilingArrows" into the Ezicad/Ezipile command line.

First set the type of arrows to display

Also set the length of the appropriate axis and the size of the text

Please note that the "layer within tolerance" and the "layer out of tolerance" are not yet supported.

Click OK and the axis are displayed and saved within the dwg.

In the screen shot above we have placed the arrows on a new layer called "arrows" and set the color of the layer to be cyan. We have also turned off the "surveyed" layer so that arrows are clearer.

The dwg can be plotted or printed out - please refer to the printing/plotting tutorial for details

As the file is a native dwg you can also open the file in your favourite dwg editor for additional editting.