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Consolidation Settlement

Estimates primary consolidation settlement of clay layers under applied loading using Terzaghi's one-dimensional theory. Handles normally consolidated, overconsolidated, and transitional cases via the compression index (Cc) and recompression index (Cr) on the e-log-p curve, with settlement governed by Sc = CcH/(1+e0) * log10(sigma_vf/sigma_v0) and its variants.

inputs

7 fields

context

3 archetypes

engine

with-tool

outputs

2 scored fields

contract fields

Parameter Map

7 inputs to 2 scored outputs

  • clay_thickness_m

    float

    Clay layer thickness H

    1 to 20m

  • compression_index_cc

    floatfrom archetypehidden in hard

    Compression index Cc

    0.1 to 1.5

  • recompression_index_cr

    floatfrom archetypehidden in hard

    Recompression index Cr

    0.01 to 0.15

  • initial_void_ratio_e0

    floatfrom archetypehidden in hard

    Initial void ratio e0

    0.5 to 3

  • preconsolidation_pressure_kpa

    float

    Preconsolidation pressure sigma'p

    30 to 500kPa

  • initial_effective_stress_kpa

    float

    Initial effective overburden stress sigma'v0

    20 to 300kPa

  • final_effective_stress_kpa

    float

    Final effective stress after loading sigma'vf

    50 to 600kPa
ocrtol 0.03

Overconsolidation ratio OCR

settlement_mmtol 0.03

Primary consolidation settlement Sc (mm)

visibility contract

Difficulty Ladder

all_giveneasy

NC clay, all parameters given, single-case settlement

all fields visible
all_givenmedium

OC clay, all parameters given, two-case settlement possible

all fields visible
partialhard

Soil properties hidden, agent must determine Cc, Cr, e0 from site description

compression_index_ccrecompression_index_crinitial_void_ratio_e0

scenario bands

Archetype Atlas

soft_nc_clay

3 contexts

Soft normally consolidated marine clay

compression_index_cc0.4 to 0.8
recompression_index_cr0.04 to 0.08
initial_void_ratio_e01.2 to 2.5

brisbane-alluvial / darwin-estuarine / gladstone-marine

medium_oc_clay

3 contexts

Medium overconsolidated clay

compression_index_cc0.2 to 0.4
recompression_index_cr0.02 to 0.04
initial_void_ratio_e00.7 to 1.2

sydney-hawkesbury / melbourne-brighton / adelaide-stiff

stiff_oc_clay

3 contexts

Stiff heavily overconsolidated clay

compression_index_cc0.1 to 0.25
recompression_index_cr0.01 to 0.03
initial_void_ratio_e00.5 to 0.8

melbourne-basalt / canberra-stiff / perth-spearwood

rendered task

Generation Preview

brisbane-alluvial-soft-nc-clay-preview

difficulty
hard
visibility
partial
archetype
soft_nc_clay
site context
brisbane-alluvial
instruction excerptconsolidation-settlement_calc.py

visible fields

  • clay_thickness_m1 to 20 m
  • preconsolidation_pressure_kpa30 to 500 kPa
  • initial_effective_stress_kpa20 to 300 kPa
  • final_effective_stress_kpa50 to 600 kPa

withheld schema

recompression_index_crinitial_void_ratio_e0compression_index_ccocrsettlement_mm
Soft normally consolidated marine clay. brisbane-alluvial. Required outputs: ocr, settlement_mm