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

FHWA Apparent earth pressure diagrams

FHWA apparent earth pressure diagrams are prescribed by the Federal Highway Administration for design purposes of vertical "flexible" retaining walls for transportation projects. FHWA recommends a number of diagrams that depend on soil type, and number of brace supports. In general, FHWA recommends using trapezoidal earth pressure diagrams that derive from active earth pressures times a factor that ranges from 1.1 to 1.3. For undrained clays a multiplication factor of 0.2 to 0.4 is recommended. One of the oversights of FHWA is that the apparent earth pressure diagrams reduce to zero at the excavation base. Applying zero earth pressure at subrade can result in undersizing of the required wall embedment. As engineers we should recognize the limitations inhereted with apparent earth pressure diagrams. For this reason, FHWA apparent earth pressure diagrams should be used as preliminary tools that can complement more comprehensive non-linear solutions.

Our deepex software COMES PACKED WITH ALL FHWA APPARENT EARTH PRESSURE CALCULATIONS. Please CLICK here to arrange a free online PRESENTATION with our technical experts

Figure 1 below shows the basic FHWA recommendations for apparent earth pressure diagrams. Figure 2 shows an apparent earth pressure diagram as calculated by our DeepEX software program.

FHWA apparent earth pressure recommendations

Figure 1: Basic recommendations by FHWA

FHWA Apparent Earth PressuresFigure 2: FHWA apparent earth pressure diagram as calculated by DeepEX

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