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

Hydraulic heave equations - hydraulic heave in deep excavations

Hydraulic heave refers to the potential for soil to heave due to water seepage forces. As excavations get deeper, hydraulic heave can get more important, especially when more permeable layers are encountered under clays.Various building codes specify how hydraulic heave should be calculated, in general an approach according to a service analysis is to formulate hydraulic heave as:

FS Hydraulic heave = (total vertical stress - uTop)/ (water pressure - uTop)

where the total vertical stress and water pressure at are a point of interest, and Utop is the water pressure at the ground surface when the ground is submerged.

Hydraulic heave equations and basic definition

Figure 1: Basic formulation of hyrdaulic heave

Hydraulic heave according to Eurocode 7 has to be calculated according to the following:

FS Hydraulic heave = LF stabilizing (total vertical stress - uTop)/ [LF destabilizing (water pressure - uTop)]

Where LF stabilizing = Stabilizing load factor, and LF destabilizing is the destabilizing load factor according to the examine design scenario.

In general, the hydraulic heave safety factor should be greater than 1.5. For example, most Eurocode 7 national annexes define 1.35 on LF destabilizing, and 0.9 of LF stabilizing.

Groundwater flownet analysis with DeepXcav software

Figure 2: Groundwater flownet analysis with our DeepEX software program.

Groundwater head contours with DeepEX

Figure 3: Groundwater flownet analysis with our DeepEX software program showing ground water head contours.

PLEASE CLICK HERE TO FIND OUT about our deep excavation software deepEx! more than 1000 users worldwide.

E-mail List Signup

Signup to our Email List for the latest information about our products, support and more.

Trusted by