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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
AND INNOVATIVE SOFTWARE SOLUTIONS
Deep Excavation LLC240 W 35th Street, Suite 1004
New York, NY, 10001
USA
Websites:
www.deepexcavation.com
www.deepex.com
Contact Information:
Tel: 1-206-279-3300
Presentation: Dimitrios Mamoglou, Civil Engineer A.U.Th.
[email protected] – T: +1-917-472-9728
Seminar: Design of Deep Excavations – Methods and Software Application
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
AND INNOVATIVE SOFTWARE SOLUTIONS
• Software solutions for excavation and foundation professionals
• Consultants – Design of deep excavations and pile foundations
• Design of Virtual Reality applications for geotechnical engineers
and contractors
DeepEX HoloDeepEX DeepFND HelixPile SnailPlus SiteMaster
Deep Excavation Definition
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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Deep excavation: typically deeper than 3.5m that requires structural support.
Seminar examines the design (seismic and non-seismic) of deep excavationssupported by tiebacks and struts.
Deep Excavation Design Challenges
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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A deep excavation system has to retain earth, water, and neighboring structures
Unknown factors and risks
Soil properties estimation
Protect adjacent properties
Design issues and Code issues
Economy
Constructability
DeepEX Capabilities and Advantages
Graphical interactive interface – Voice commands
Design and analysis of any deep excavation model
Structural and geotechnical design
Design standards (Eurocodes, US standards, Australian, Chinese etc.)
Model optimization
Fast design – model wizard
Exports reports and sketches
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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Projects designed with DeepEX
Major braced excavations for LA
Subways, Los Angeles, CA, USA
Cofferdams for New Tapan Zee
Bridge, New York, NY, USA
Circular wet soil mix shaft,
Tampa, FL, USA
Soldier pile walls with struts,
Arkansas, USA
Soldier pile walls with tiebacks,
Seattle, WA, USAJeffery road grade separation,
Irvine, CA, USA
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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Projects designed with DeepEX
LaBrea Metro Station, Los Angeles, California, USA
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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100 ft (30.5 m) Excavation
Soldier Piles and Lagging
Lateral Bracing (Struts)
Full Design with DeepEX
5 Stations designed and under
construction
Projects designed with DeepEX
New Tapan Zee Bridge Cofferdams, New York, USA
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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$3.9 billion project
90x45ft (27.5x13.7m)
Cofferdams
Lateral Bracing (Struts)
Full Design with DeepEX
Projects designed with DeepEX
Soldier Pile Excavation Pits with Diagonal Struts, Arkansas, USA
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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24 ft (7.3m) Excavation
Soldier Piles and Lagging
Pipe Struts
Full Design with DeepEX
Projects designed with DeepEX
Soldier Pile Excavation Pits with Diagonal Struts, Arkansas, USA
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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90 ft (27.5m) Excavation
Soldier Piles and Lagging
Pipe Struts
9 rows of Tiebacks
Analysis Methods in DeepEX
Limit Equilibrium Analysis
Non-Linear Analysis
Finite Element Analysis
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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Conventional Analysis Methods
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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Assume lateral earth pressures.
Determine fixity locations for forces at subgrade.
Analyze wall beam with assumed loads.
Advantages: Easy method to verify. Gives a back check for more rigorous methods.
Disadvantages: Soil-structure interaction ignored.
Non-Linear Analysis Concept
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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Soil Elasticity Models
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Linear elastic perfectly plastic
Exponential
Subgrade modulus
Small strain hardening
Reloading stiffness linear 3 to 5 x loading E
Elastoplastic
model
Exponential
model
Support Types in DeepEX
Tiebacks Rakers Fixed Supports Springs Walers
Tierods Struts Slabs
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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Determine Wall Net Loading Diagram
Soil Pressures
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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Surcharge Water
Pressures
Seismic
Pressures
Net Pressures
Soil Pressures in LEM Analysis in DeepEX
Active Pressures At-rest Pressures Peck Apparent Pressures
FHWA Apparent Pressures Custom Trapezoidal Pressures Two Step Rectangular Pressures
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External Loads in DeepEX
Loads on ground surface:
Strip surcharges Linear loads 3D loads (buildings, footings,
3D surface loads
Loads on the wall:
Strip surcharges Linear loads External moments Prescribed displacements
Load modeling options:
Elasticity equations Two-way distribution angle One-way distribution angle One-way distribution angle from soil friction Elasticity to vertical stress x Ka (or Ko) CIRIA Special Pub 95 - 1993
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Water Pressures in DeepEX
Simplified Flow Hydrostatic Pressures Full 2D Flownet
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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Seismic Pressures in DeepEX
Define Seismic Accelerations Ax and Az
Select Seismic Pressures Calculation Method
Select a Seismic Design Standard
Semirigid
Mononobe-Okabe (frictional soils)
Wood Automatic
Wood Manual
Procedure in DeepEX
Seismic Pressure Methods
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Seismic Pressures in DeepEX
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Non-seismic Conditions
Max. Wall Moment=150.6 kNm/m
Max. Support Reaction=267.2 kN/m
Seismic Conditions (Ax=0.12g)
Max. Wall Moment=190.7 kNm/m
Max. Support Reaction=360.05 kN/m
Seismic Pressures might be critical for the wall/support design
Staged Construction
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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Deep excavations always require stagedconstruction.
Even wall construction can affect performance.
Start from at-rest conditions (or before)
Advantages of staged construction design:
Design for the most critical stage (not alwaysthe last one)
Locate the critical stage – easier optimization(consider optimizing the support locations instead of structural sections)
Realistic wall displacements (when a non-linearanalysis method is used)
Staged 0: At-rest Staged 1: Excavation
Staged 2: Support
Installation
Staged 3: Further
Excavation
Example 1: 5m excavation with a tieback
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Sand, φ=30 deg, γ=19.5 kN/m3
Sand, φ=32 deg, γ=21 kN/m3
Example 2: 12m excavation with struts
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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Holographic Representation of
Deep Excavations
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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Visualize a deep excavation in real
space
Visualize challenging ground
conditions
Walk in the excavation before it is
built
Works with: Mixed reality glasses
Virtual reality headsets
Regular PC’s
Model: Braced Excavation and 3D Model
with DeepEX
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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Model: Soldier Pile Walls with Tiebacks
with DeepEX
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Model: Diaphragm wall with tiebacks and
3D Model with DeepEX
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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Model: Deadman Sheet Pile Wall with DeepEX
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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Slope Stability and Soil Nailing in DeepEX
Bishop Method Morgenstern Price Method (G.L.E.) Spencer Method Ordinary (Swedish) Method Automatic Slope Search Method
Single Point Slope Center Rectangular Slope Center Define Radius Search Limits Soil Nails Clouterre Standards for Soil Nails
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Thank you!
Information:
www.deepex.com
www.deepexcavation.com
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DEEP EXCAVATIONEXPERTS IN GEOTECHNICAL ENGINEERING
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