Creating Retaining Walls

A retaining wall site modifier can be created based on existing walls created with the Wall tool or Round Wall tool. The existing wall can be a single wall or a chain of multiple wall segments that are L-joined to each other. The retaining wall created can modify the site model, and the terrain can be sculpted around the retaining wall.

Once created, the retaining wall site modifier is not associated with the wall object used to create it.

To create a retaining wall site modifier:

1. Select the wall or multiple, L-joined walls.

While walls are typically used as the basis for creating a retaining wall, other valid selections include a hardscape object or an extrude object.

2. Select the Create Retaining Wall Site Modifier command from the appropriate menu:

●    Designer workspace: AEC > Terrain > Create Retaining Wall Site Modifier

●    Landmark workspace: Landmark > Create Retaining Wall Site Modifier

The Create Retaining Wall Site Modifier dialog box opens. Set the initial location of the site modifiers within the retaining wall. There are three distinct areas that can modify the site model:

●    The pad at the bottom of the wall, which can be offset from the top or bottom of the wall, or simply follow the terrain

●    The left and right side edges of the wall, which can be offset from the top or bottom of the wall, or follow the terrain

●    The starting and ending edges of the wall

The left and right sides of the wall are determined by the wall direction as it was drawn.

Click to show/hide the parameters.

Parameter	Description
Diagram	This wall schematic shows the location of the pad modifier at the bottom of the wall (1), the left (2) and right (3) edge modifiers, and the start (4) and end (5) edge modifiers; it also shows the wall start and end, which determines the wall direction and therefore which edge is left and right
Pad	Specifies the vertical offset and shape of the modifier pad; the modifier can be offset from the top or bottom of the wall and follow top or bottom wall peaks, or can simply follow the current terrain. The pad offset can control the cut and fill values produced by the site modifier.
Offset Below Wall Top	Sets the pad modifier to be offset below the top of the wall by the specified value
Follow Top Wall Peaks	The modifier shape follows the wall peaks at the top of the wall. If a wall has vertical peaks, the modifiers will be nearly vertical.
Offset Above Wall Bottom	Sets the pad modifier to be offset above the bottom of the wall by the specified value
Follow Bottom Wall Peaks	The modifier shape follows the wall peaks at the bottom of the wall. If a wall has vertical peaks, the modifiers will be nearly vertical.
Follow Terrain	The pad modifier follows the terrain location (offset and shape) along the bottom of the wall
Side Edges
Left/Right Modifier Edge	Select whether to create the edge modifier objects on the left and/or right sides of the retaining wall. Edge modifiers sculpt the terrain at the left or right of the retaining wall sides according to the parameters set. The modifier can be offset from the top or bottom of the wall and follow top or bottom wall peaks, or can simply follow the current terrain.
Offset Below Wall Top	Sets the edge modifier to be offset below the top of the wall by the specified value
Follow Top Wall Peaks	The modifier shape follows the wall peaks at the top of the wall. If a wall has vertical peaks, the modifiers will be nearly vertical.
Offset Above Wall Bottom	Sets the edge modifier to be offset above the bottom of the wall by the specified value
Follow Bottom Wall Peaks	The modifier shape follows the wall peaks at the bottom of the wall. If a wall has vertical peaks, the modifiers will be nearly vertical.
Follow Terrain	The edge modifier follows the terrain location (offset and shape) along the side of the wall
Start/End Edges	The start and end edge modifiers define how the terrain wraps around the retaining wall sides
Include Start Modifier Edge	Select whether to create an edge modifier object at the starting edge of the wall
Include End Modifier Edge	Select whether to create an edge modifier object at the ending edge of the wall

3. Click OK to create the retaining wall site modifier. The original wall remains in the drawing; the site modifier is a new, separate object.

4. Update the site model to apply the changes (select the site model and click Update from the Object Info palette).

Editing Retaining Walls

Retaining wall parameters can be edited from the Object Info palette.

Click to show/hide the parameters.

The retaining wall site modifier consists of four modifier edges, joined by common vertices. The left and right edges of the retaining wall site modifier can be reshaped with the Reshape tool, similar to reshaping walls (see Reshaping Walls). Move vertices, and add or delete vertices to reshape the retaining wall.

The start and end edges cannot be directly edited with the Reshape tool. However, a vertex added to the left or right edge can be edited by the Reshape tool (select Start/End Modifier Edge from the Move list in the Object Info palette, and click Add Vertex). Adding vertices to the start and end edges allows them to be reshaped.

The Send to Surface command can be used to send either the retaining wall modifier edge or the pad to the surface of the site model.

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Creating Walls

Wall Direction

Reshaping Walls

Joining Walls

Creating Stepped Walls

Reshaping Objects

Sending Objects to the Site Model Surface

Updating a Site Model

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