tutorial 7: two walls: backfill and excavation deep excavation llc deepex 2015 – advanced course1
TRANSCRIPT
Tutorial 7: Two Walls: Backfill and Excavation
Deep Excavation LLC
DeepEX 2015 – Advanced course 1
DeepEX is a software program for braced excavations in soils with 2D limit-equilibrium and non-linear analysis
methods, and structural verification of all elements (with AISC, ASD, Eurocodes).
It offers the ability to analyze walls with multiple braces (tiebacks) in multilayered soils.
The non-linear analysis considers elastoplastic behavior for the whole soil-wall-support system.
The program also offers the ability to perform traditional limit-equilibrium analyses.
The graphical interface is completely interactive and the input is simplified to a great extend.
The program utilizes archives of wall types, structural and soil materials, ground anchors etc.
The analysis can be performed in either an utlimate state or at a service state (allowable design, LRFD, or Eurocode 7
design approach methods).
The program offers the ability to automatically set all critical settings according to the desired design methodology.
Corso Paratie, Milano 30 settembre 2009
INTRODUCTION
DeepEX 2015 – Advanced course 2
Change the Surface Level to -3 m
Go to the General Tab and press the Move Model Elevation button
Change the Elevation to -3 m and select All Boreholes
Press Ok
DeepEX 2015 – Advanced course
Change units to metric
Set sizes and other standards to metric• Go to design tab • Design codes can be changed by clicking on
the CODE button or on the drop down
At Stage 0, go to Model Tab and press the Add 2nd Wall button.
Add 2nd Wall
DeepEX 2015 – Advanced course
By double-clicking on the wall, you can change the wall properties
Edit Wall Section
DeepEX 2015 – Advanced course
Edit Left Wall Data
Set the top Wall Elevation to 0
Change the Wall Depth to 7m
Press Ok
Press Edit Section Data
DeepEX 2015 – Advanced course
Edit Left Wall Section Properties
Select a Sheet pile wall
Select a Sheet pile AZ 19 Section
Press Ok
DeepEX 2015 – Advanced course
Edit Right Wall Data
Set the top Wall Elevation to 0
Change the Wall Depth to 15m
Press Edit Section Data
Change the Wall x-coordinate to 20m
DeepEX 2015 – Advanced course
Edit Right Wall Section Properties
Select a Sheet pile wall
Select a Sheet pile AZ 25 Section
Press Ok
Add a new Wall Section
DeepEX 2015 – Advanced course
Press Ok
Apply the new Wall Section
Select and apply the new Wall Section
DeepEX 2015 – Advanced course
Add a new Stage and a tieback 1. Press the Add Stage button
2. Select “Draw ground anchor” to draw the tierod
3. Select the two Walls to add the tieback
DeepEX 2015 – Advanced course
Edit Tieback Properties
Change the tieback’s Elev. z-coordinate to -2.5m
Press Ok
Press Edit
Press Add New Tieback Section
Select D32 and 1 bar (Grade 150)
DeepEX 2015 – Advanced course
Edit Tieback Properties
Press Ok
Select Tieback Section
DeepEX 2015 – Advanced course
Add a new Stage and Backfill1. Press the Add Stage button2. Change the Left and Center
Elevation to 0
DeepEX 2015 – Advanced course
Add a new Stage and Excavate 4m to the right side1. Press the Add Stage button (stage 4)
2. Change the Right Elevation to -7
DeepEX 2015 – Advanced course
Calculate Design Section
Press Calculate Selected Design Section
DeepEX 2015 – Advanced course
Result summary (when completed)
Results – Wall Deflections , Stage 3
Press Dx to show Wall Deflection
Press to show min, max values
Results – Wall Moment , Stage 3
Press to show Wall Moment
Press to show Wall Moment Capacity Press to Show Env. to display
envelope for all stages
Results – Wall Shear, Stage 3
Press to show Wall Shear
Press to show Wall Shear Capacity
Results – Support Reactions, Stage 3
Press to show Support Reaction
Interaction between two walls• When Limit-Equilibrium is performed with Non-linear analysis,
program calculates interaction surcharge on lower wall as a percentage of the resisting pressures.
Horizontal soil pressures
• From elastoplastic analysis