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Tutorial 6: Excavation outside of two walls connected with a tieback

Tutorial 6: Excavation outside of two walls connected with a tieback. Deep Excavation LLC. DeepXcav 2011 – Advanced course. 1. INTRODUCTION .

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Tutorial 6: Excavation outside of two walls connected with a tieback

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  1. Tutorial 6: Excavation outside of two walls connected with a tieback Deep Excavation LLC DeepXcav 2011 – Advanced course 1

  2. INTRODUCTION DeepXcav 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 or LRFD). The program offers the ability to automatically set all critical settings according to the desired design methodology. The program also offers the ability to perform slope stability analyses with soil nails. Corso Paratie, Milano 30 settembre 2009 DeepXcav 2011 – Advanced course 2

  3. Change the Surface Level to 100 m Go to the General Tab and press the Move Model Elevation button Change the Elevation to 100 m and select All Boreholes Press Ok DeepXcav 2011 – Advanced course

  4. Add 2nd Wall At Stage 0, go to Model Tab and press the Add 2nd Wall button. DeepXcav 2011 – Advanced course

  5. Edit Wall Section By double-clicking on the wall, you can change the wall properties DeepXcav 2011 – Advanced course

  6. Edit Wall Properties Press the Edit Section Data button Change the wall depth to 20m Change 2nd wall x-coordinate to 20 m Press Ok DeepXcav 2011 – Advanced course

  7. Change the Wall Width to 0.8m Press Ok DeepXcav 2011 – Advanced course

  8. Add new Stage Go to the Model Tab Press the Add Stage Button DeepXcav 2011 – Advanced course

  9. Perform a 3m Excavation left and right of the two walls the two walls and add a new Stage Change the left and right elevation to 97 m Click on the Add Stage button DeepXcav 2011 – Advanced course

  10. Add a tieback connecting the two walls Press the Add a Tieback button Click on the two walls to connect them with a tieback DeepXcav 2011 – Advanced course

  11. Change the tieback properties Change the z-coordinate of the support to 97.5 Go to the Tab B. Prestress-Unbraced Select the Adjust Prestress option Adjust Prestress 250 KN Press Ok DeepXcav 2011 – Advanced course

  12. Add a new Stage and excavate 4 m Change the left and right elevation to 93 m Change the water elevation to 93 m Add a new Stage

  13. Calculate the Design Section Press the Calculate the selected Design Section button DeepXcav 2011 – Advanced course

  14. Results – Wall Deflection, Stage 3 Go to the Results Tab Select Dx to show the Wall Deflections Select to shoe min, max values DeepXcav 2011 – Advanced course

  15. Results – Wall Moment , Stage 3 Select to show the Wall Moment Capacity Select Wall Mom. to show the Wall Moment DeepXcav 2011 – Advanced course

  16. Results – Wall Shear, Stage 3 Select to show the Wall Shear Capacity Select Wall Shear DeepXcav 2011 – Advanced course

  17. Results – Tieback Reaction, Stage 3 Select to show the Support Reactions DeepXcav 2011 – Advanced course

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