GeoSpring 1.0: A Software for Designing Shallow & Deep ...

GeoSpring 1.0

A Software for The Design of Shallow & DeepFoundations

By Wafi Bouassida: PhD, M.Sc, P.Eng

[email protected]

www.bouassidageotechnics.wordpress.com

SIMPRO Consulting, Ariana, Tunisia

GeoSpring 1.0 / Wafi Bouassida / January 2020 1

mailto:[email protected]

http://www.bouassidageotechnics.wordpress.com/

GeoSpring In Brief


Features of GeoSpring 1.0

Design of Shallow Foundations: Bearing Capacity and Settlement

Design of Deep Foundations: Bearing Capacity and Settlement

Design of Rigid Inclusions : Determining the Improvement Area Ratio η (%)

Settlement of Embankments


GeoSpring 1.0: Shallow Foundations

1/ Bearing Capacity according to C-Phi & Pressuremeter Methods

2/ Short Term Settlement according to Elastic & Pressuremeter Methods (EC7 and French Code)

3/ Long Term Settlement according to Odometer Test Results


GeoSpring 1.0: Shallow Foundations Examples

Insert the different Layer Characteristics In the GeoSpring 1.0 Interface

Insert the Footing Geometry and Embedment


GeoSpring 1.0 : Insert the water Level


GeoSpring 1.0 : Shallow Foundations / B.C Results


GeoSpring 1.0: Short Term Settlement of Shallow Foundations

• 1st Alternative: User puts directly the deformation modulus of each layer to estimate the settlement of the studied footing


GeoSpring 1.0: Short Term Settlement of Shallow Foundations


Short Term Settlement Estimation

• 2nd Alternative: User puts the PMT Data to estimate the settlement (The presented data are different form those of the first alternative)


GeoSpring 1.0 : Variation of the Short Term Settlement along the Footing Width


GeoSpring 1.0: Estimation of the Oedometric Settlement

Insert the footing Geometry / Embedment and Water Level

Insert the oedometric data In the GeoSpring Interface


GeoSpring 1.0: Oedometric Settlement Results


GeoSpring 1.0: Deep Foundations

Bearing Capacity of Single Piles : C-Phi Method & Pressure meter Method

Settlement of Single Piles according to load transfer Methods

Settlement of Pile Groups according to the Load Interaction Factor Method

The Pile Technologies of Concern Herein are : Bored, Driven, CFA and RIT Piles


GeoSpring 1.0: Single Piles / Bearing Capacity according to C-Phi Method



• Insert the shear strength characteristics of each layer



• The results are : The Shaft Capacity, The Tip Capacity and The Total Load Capacity according to the inserted Factor of Safety


GeoSpring 1.0: Settlement of Single Piles

• First Method: Cubic root Load Transfer Curves (After Bohn et al 2016)



• Second Method: Frank and Zhao Tri-linear Load Transfer Curves based on Pressuremeter Test Results


GeoSpring 1.0: Settlement of Single Piles according to the Load transferMethod (Cubic root curves)


GeoSpring 1.0: Settlement of Single Piles according to Pressuremeter data (Frank & Zhao Load Transfer Curves)


GeoSpring 1.0: Load Settlement Curve according to Pressuremeter Data


GeoSpring 1.0: Settlement of Piles Group

• Based on the Load Interaction Factor Method

• 𝑤𝑖 = 𝑗=𝑙𝑛 𝑃𝑎𝑣 × 𝑆𝑙𝑒 × 𝛼(𝑖, 𝑗)

Pav : Average Load on each pile among the groupSle: Elastic flexibility of the pileα (i, j): Interaction factor of pile (i, j) on the settlement of thestudied pile

𝛼 = 𝐴 × (𝑠/𝑑)𝐵

𝛼 = 𝐶 + 𝐷 𝑙𝑛𝑠

𝑑

The Values of A which ranges between 0.57 and 0.98 and B ranging from -1.2 to -0.6 had been extracted from four typical filed tests assuming that no interaction occurs beyond a certain spacing. This was the same thing for C=1 and D=-0.26.


GeoSpring 1.0: Settlement of Piles Group


GeoSpring 1.0: Settlement of Pile Groups


GeoSpring 1.0: Rigid Inclusions Design


GeoSpring 1.0: Rigid Inclusions Design: Improvement Area Ratio needed to limit the Settlement at 3cm


GeoSpring 1.0: Settlement of Embankments


GeoSpring 1.0: Short Term Settlement of Embankments


GeoSpring 1.0: Oedometric Settlement of Embankments


Thank You For Your Interest


GeoSpring 1.0: A Software for Designing Shallow & Deep ...

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