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Last Chance 60 hours

Data, databases, and Machine Learning for Geotechnical Engineers

Data, databases, and machine learning for civil engineers

Starts Sep 23rd

The future of civil engineering is approaching

Online Deep Excavation and Soil nail wall design Workshop

16 PDH

Nov 18-19, 2020

Deep excavation in Las Vegas

Early registration ends soon!

DeepEX 2020

Solving Deep Excavation Design

DeepEX 2017 talk to it and design your deep excavation!

Online Slope Stability, Soil Nailing, and Inclinometer Monitoring Workshop

4 hours each day, 8 PDH

Slope stability, soil nailing, and inclinometer worksho

July 15, 16, 2020

Deep Foundation Software, Pile Rafts, Pile Groups

From soil estimation to axial and lateral pile capacity

DeepFND - Deep Foundation Software, caissons, CFA, drilled piles, driven piles, concrete, timber

From soil estimation to helical pile settlement estimation.

New helical pile software HelixPile
Signup for a free trial and get our free pdf on the five most common errors in deep excavation design
What do you want to design?
DeepFND 2020: Deep Foundation software (NEW: Pile-Group/Pile Raft Analysis!)
DeepEX 2020: Deep Excavation software
Soldier pile walls
Sheet pile walls
Secant pile Walls
Tangent piles
Diaphragm Walls
Soldier and Tremied Concrete
Soil Mix walls
Combined king pile sheet piles
Slope stability
Cost estimation for braced excavations
Waler-Strut Cofferdams
Snail-Plus 2019: Soil nailing - soil nailing walls
SiteMaster: Inclinometer software (adopted by Geokon)
HelixPile: Helical Pile Software
RC-Solver: Concrete Design ACI-318, EC2, EC8
Steel-Beam: Steel beam column design, full equations, AISC, EC3

Deep Excavation model in Abu Dhabi, U.A.E.

Compared with DeepEX, FREW, and Plaxis 2D

NSCC International in 2015 presented a paper on a deep excavation performance for the Emirates Pearl Tower and Bab El Qasr Hotel in Abu Dhabi. The paper was presented in DFI 2015 by Dr. Walid Jaber & Amr Al Degwe. The 20m deep excavation was supported by a 1.0m thick reinforced diaphragm wall with most of the excavation braced with three levels of ground anchors. In one corner, the excavation was supported by two levels of steel struts. The performance of the excavation was instrumented for lateral displacements and support reactions. We reanalyzed published results with DeepEX 2018 and obtained really good correspondance with observed behavior. 

Deep Excavation in Abu Dhabi with three levels of ground anchors in DeepEX
Deep Excavation in Abu Dhabi with two levels of struts in DeepEX

The original publication compared results from FREW and Plaxis 2D. Obviously a lot of assumptions can go into running an analysis. So we went in and performed our evaluation by making similar assumptions to what the authors had presented in their publication. When missing, some parameters were assumed based on engineering evaluation and any available literature. The following table compares the results presented by the authors against our DeepEX evaluation:

Comparison between DeepEX - FREW and Plaxis for a deep excavation in Abu Dhabi

Our DeepEX evaluation produced wall displacements that were closest to measured displacements. Support reactions were very close for all models. From measured results it was also visible that maximum reactions were observed only in limited cases.

DeepEX produced smaller moments vs. FREW and comparable moments to Plaxis2D. The bending moment results from the non-linear analysis of DeepEX were also verified with conventional analysis methods. Given that measured displacements were much smaller than predicted we feel that the DeepEX bending moment results were closer to actual bending moment values. Another interesting aspect was that reasonable modelling of the ground water table and flow conditions was an important factor in capturing realistic response. In this case, we found that using the full flow analysis was vital in capturing realistic loads.

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