Earth retaining structure

Earth retaining structure is a working sheet for retaining wall sections. Enter the geometry, the backfill and the water; get the active thrust, the resultant height, three factors of safety and a pressure profile you can read at a glance. Real soil mechanics, not a black box. Earth retaining structure computes Rankine and Coulomb active and passive coefficients, integrates layered backfill with effective stress, adds pore pressure separately so a water table is never silently underestimated, and handles sloping fill and uniform surcharges. Mononobe-Okabe pseudo-static seismic thrust is one slider away. A trial-wedge search double-checks the closed-form result — if the two disagree, the app tells you the section is outside the model rather than hiding it. The whole section, three verdicts. Wall weight and stabilising moments are computed from the true geometry of gravity, cantilever, MSE and gabion sections. Sliding, overturning and bearing checks run against your own thresholds, with a base pressure diagram that shows eccentricity and lift-off honestly. Adjust the base width with a slider and watch every number respond live. Slopes too. An infinite-slope stability module covers planar slips in the same soils, with a critical-angle search and back-calculation: given a target factor of safety, Earth retaining structure solves for cohesion, height or slope angle. Made for the field and the classroom. Ten USCS soil classes with typical values, a coefficient reference table, and a library of wall types with sensible proportions. Save any check with a full frozen copy of its inputs, compare the last five runs side by side, log measured movement, and export a one-page PDF report or the complete dataset as JSON. Metric and imperial units switch anywhere; dark mode is fully supported. Honest by design. No accounts, no analytics, no network access — nothing ever leaves your phone. Earth retaining structure is a sanity check and a teaching tool, not a substitute for a site investigation or a code-based design.

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