Tel: 1-206-279-3300

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

Upcoming Workshop Series

60 hours

Data, databases, and Machine Learning for Geotechnical Engineers

Data, databases, and machine learning for civil engineers

Aug, Sep, Oct 2020

The future of civil engineering is approaching

Online Deep Excavation and Soil nail wall design Workshop

16 PDH

Apr. 22,23, 29, 30, 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!

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

Mixed Soldier Pile and Rock Anchor Deep Excavation in Carrollton, Texas---Designed with DeepEX

Construction of a new pump station at the Elm Fork Water Treatment Plant in Carrollton, Texas required a 56 ft deep excavation. Substrata conditions consisted of 20ft of fill, and clays over shale rock. The solution was to provide a soldier pile and timber lagging wall supported by one level of tiebacks in the upper 20 ft and step the excavation in rock by stabilizing the rock mass with anchors. To save on pile costs, the initial excavation was benched and the soldier piles were installed from a lower elevation.

The soldier pile deep excavation was designed and constructed by Lance Kitchens, P.E. of Russo Construction, using our DeepEX software. Deep Excavation assisted Russo with the design review and setup of the deep excavation model.  An aerial image of the deep excavation can be seen below:

Soldier piles and tiebacks in Texas deep excavation

Figure 1  Aerial image of completed shoring wall in Carrollton, Texas

Conditions like this requires careful examination of various design conditions. First, the soldier pile wall and tieback system needs to be designed to resist the earth and any surcharge loads.  Because the tiebacks are inclined and the pile wall is embedded in rock, the vertical anchor load component will immediately be transferred to the pile and pile socket.  In this case it is typical to examine the stability of rock wedges from the pile tip sloping down to the rock face. DeepEX examined automatically such conditions by also considering the effect of rock anchors in the stability.

Excavation of the vertical rock faces also reduces the available passive resistance on the soldier piles. In this case, the available passive resistance depends on the number of rock anchors, their length, and on the intersection with potential slip surfaces. In DeepEX, the passive resistance on the soldier piles was examined by having the program investigate different sliding surfaces and finding the critical conditions.

Last, the global stability of the whole soldier pile excavation-rock anchor supported system had to be considered. In DeepEX, an automatic search algorithm was utilized to find the most critical potential sliding mass.

In this project, DeepEX was instrumental as it allowed the designer to fully consider all aspects of the deep excavation design in one package.

Soldier pile excavation model in Texas deep excavation

Figure 2 Support of Excavation Analysis with Soldier Pile and Rock Anchors in DeepEX

Excavation face with soldier piles tiebacks and rock anchors

Figure 3 Viewing the mixed soil-rock excavation face supported by soldier piles and rock anchors

See how DeepEX can be an expert by your side, contact us for a 30 minute web demonstration!

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