Open source · AGPL-3.0 · Python
Lythos is a family of eight geotechnical engineering programs for slopes, foundations and retaining structures. They share one architecture: driven from your browser, bilingual in English and Turkish, reporting to PDF, HTML and Word, and tested against closed-form solutions.
$ pip install lythosbearing
$ lythos-bearing
Lythos Bearing 0.1.0 — http://127.0.0.1:8781/
$ lythos-bearing run project.bearing
Bearing capacity by method
Terzaghi (1943) q_ult = 516.8 kPa
Meyerhof (1963) q_ult = 466.0 kPa
Brinch Hansen (1970) q_ult = 474.2 kPa
Vesić (1973) * q_ult = 533.5 kPa
EN 1997-1 Annex D q_ult = 517.3 kPa
Sliding: FS = 5.33 ≥ 1.50 — OKOpens in your browser; your data never leaves your machine.
Each tool does one job in depth; together they cover the geotechnical design of a whole project.
Finite elements, limit equilibrium and rock slope kinematics.
2D finite element analysis
2D finite elements for slopes, embankments and deep excavations: factor of safety by strength reduction, staged construction, internal forces in walls and piles, sections and construction sequence straight from DXF.
pip install lythosfeaLimit equilibrium slope stability
Method-of-slices stability of slopes and embankments: eight methods from Fellenius to Morgenstern-Price, critical surface search, water, seismic, reinforcement and tension cracks — with zero dependencies.
pip install lythosleRock slope kinematics and stability
Markland screening on a stereonet and Monte Carlo probability of failure, then wedge, planar and toppling limit equilibrium, bolt design and PDF reports — in one workflow.
pip install lythoskinematicShallow foundation capacity, settlement and piles.
Bearing capacity of shallow foundations
Terzaghi, Meyerhof, Hansen, Vesić, EN 1997-1 and Skempton side by side; eccentric and inclined loads, layered ground, SPT/CPT/pressuremeter, rock, earthquake and reliability studies.
pip install lythosbearingSettlement of foundations and embankments
Boussinesq and 2:1 stress distribution, Steinbrenner and Schmertmann immediate settlement, primary consolidation and secondary compression, Terzaghi time–settlement and angular distortion checks.
pip install lythossettlePile capacity, groups and settlement
Shaft friction by the α, β and λ methods, Meyerhof/Vesić/Janbu base resistance, group efficiency and block failure, required length, single and group settlement; rock sockets by twelve correlations.
pip install lythospile · installs from GitHubSheet pile walls and mechanically stabilised earth.
Sheet pile wall analysis
Free-earth support limit equilibrium and staged Winkler beam-spring analysis side by side; Mononobe-Okabe seismic pressures, tension-only anchors and reliability studies.
pip install lythosspwaMechanically stabilised earth walls
External and internal stability per FHWA-NHI-10-024 and AASHTO LRFD 11.10: sliding, overturning, bearing, tensile, pullout, connection; steel strips and geosynthetics, corrosion, earthquake, ASD or LRFD.
pip install lythosmsew · installs from GitHubLearn one and you know them all. Same interface layout, same files, same commands.
The interface is a small HTTP server on your own machine. It works over a remote session, in a container and on a headless server.
Every label, result, figure and report in English and Turkish; switch while it runs — the numbers never change.
PDF, self-contained HTML and Word reports come from one assembly, so all three say the same thing.
Inputs are saved as readable JSON. A case set up in the browser re-runs unattended from the command line.
Sweep any input as a range or a distribution: LHS, Monte Carlo, sensitivities, probability of failure and β.
Every method is pinned with pytest against published tables, hand calculations and closed-form solutions.
One engine — click through it in the browser, drive it from the command line, or script it from Python.
Follow the design of an excavation, a fill, a piled foundation and an anchored wall on a port site end to end, with the right Lythos tool at every step.
Go to the end-to-end example →Python 3.10+ and a single pip command.
Installation guide →