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groundwith-tool

Ground Structural Electrical Safety Package

Calculates source-bound ground structural-electrical safety metrics from a deterministic SSC-07 task-owned source pack. The template combines SPT correction, CPT-derived behavior and friction angle, Terzaghi shallow foundation bearing capacity, and IEEE 80-style grid resistance/GPR checks while keeping the mechanical ground model separate from the electrical resistivity model.

with-tool: The model is given an executable Python calculator script.

Standards

IEEE 80-2013Liao and Whitman 1986Robertson 1990Terzaghi 1943

Tags

bearing-capacitycptdeterministicearthinggeotechnicalgroundresistivityspt

How this task is generated

One template produces many comparable benchmark tasks while keeping the scoring contract fixed.

  1. 01

    Template

    The reusable contract shown on this page.

  2. 02

    Scenario

    An archetype and site context are sampled.

  3. 03

    Difficulty tier

    Inputs may be hidden at harder tiers.

  4. 04

    Task prompt

    The model responds with the declared outputs.

Parameters

Inputs the model receives, and the outputs it is scored on.

Inputs

28 inputs

Always given

Included directly in every task prompt.

28
Show 28 inputs

  • Raw n value

    raw_n_value

    SPT-07-03-06M raw blow count from BH-07-03

    18

  • Effective overburden

    effective_overburden_kpa

    SOIL-07-PARAM-01 effective overburden pressure at the SPT depth

    125 kPa

  • Hammer type

    hammer_type

    SPT hammer type

    auto

  • Borehole diameter

    borehole_diameter_mm

    BH-07-03 borehole diameter class

    115

  • Sampler type

    sampler_type

    SPT sampler liner state

    with_liner

  • Rod length

    rod_length_m

    SPT-07-03-06M rod length

    8 m

  • Minimum design n1 60

    minimum_design_n1_60

    GM-SSC07-001 minimum corrected N1,60 for the shallow foundation design case

    15

  • Qc

    qc_mpa

    CPT-07-02 cone resistance at the design depth

    12 MPa

  • Fs

    fs_kpa

    CPT-07-02 sleeve friction at the design depth

    60 kPa

  • U2

    u2_kpa

    CPT-07-02 pore pressure behind the cone

    25 kPa

  • Cpt depth

    cpt_depth_m

    CPT-07-02 design interpretation depth

    6 m

  • Total unit weight

    total_unit_weight_kn_m3

    SOIL-07-PARAM-01 total soil unit weight

    18.5 kN/m3

  • Water table depth

    water_table_depth_m

    GW-07-WET-001 wet-season water table depth below ground

    2.1 m

  • Net area ratio

    net_area_ratio

    CPT-07-02 cone net area ratio

    0.8

  • Interpreted design phi deg

    interpreted_design_phi_deg

    GIM-07-001 interpreted design friction angle from the ground interpretation memo

    32 degrees

  • Cohesion

    cohesion_kpa

    SOIL-07-PARAM-01 effective cohesion for the bearing check

    5 kPa

  • Footing width

    footing_width_m

    FDN-07-MAT-01 footing width

    2.4 m

  • Embedment depth

    embedment_depth_m

    FDN-07-MAT-01 footing embedment depth

    1.2 m

  • Footing shape

    footing_shape

    FDN-07-MAT-01 footing shape

    square

  • Factor of safety

    factor_of_safety

    GIM-07-001 bearing-capacity factor of safety

    3

  • Applied bearing pressure

    applied_bearing_pressure_kpa

    FDN-07-MAT-01 applied service bearing pressure

    220 kPa

  • Soil resistivity

    soil_resistivity_ohm_m

    RES-07-ERT-01 apparent soil resistivity for the earthing model

    85 ohm-m

  • Grid length

    grid_length_m

    GRID-07-EARTH-01 grounding-grid length

    32 m

  • Grid width

    grid_width_m

    GRID-07-EARTH-01 grounding-grid width

    24 m

  • Total conductor length

    total_conductor_length_m

    GRID-07-EARTH-01 total buried conductor length

    360 m

  • Burial depth

    burial_depth_m

    GRID-07-EARTH-01 conductor burial depth

    0.6 m

  • Grid current

    grid_current_ka

    FAULT-07-001 maximum grid current

    3.2 kA

  • Gpr limit

    gpr_limit_v

    GIM-07-001 source-pack ground-potential-rise screening limit

    5000 V

Scored outputs

14 outputs

Spt n60

spt_n60

Energy, borehole, sampler, and rod-length corrected SPT N60

Scores if within ±3% of the reference value.

Spt n1 60

spt_n1_60

Overburden-corrected SPT N1,60

Scores if within ±3% of the reference value.

Spt n1 60 margin

spt_n1_60_margin

SPT N1,60 minus the source-pack minimum design N1,60

Scores if within ±3% of the reference value.

Cpt qt mpa

cpt_qt_mpa

Corrected CPT cone resistance

Scores if within ±3% of the reference value.

Cpt ic

cpt_ic

CPT soil behavior type index

Scores if within ±3% of the reference value.

Cpt phi deg

cpt_phi_deg

CPT-derived drained friction angle

Scores if within ±3% of the reference value.

Governing phi deg

governing_phi_deg

Smaller of the interpreted design phi and CPT-derived phi

Scores if within ±3% of the reference value.

Allowable bearing capacity

allowable_bearing_capacity_kpa

Allowable Terzaghi shallow foundation bearing capacity

Scores if within ±3% of the reference value.

Bearing utilization

bearing_utilization

Applied bearing pressure divided by allowable bearing capacity

Scores if within ±3% of the reference value.

Bearing margin

bearing_margin_kpa

Allowable bearing capacity minus applied bearing pressure

Scores if within ±3% of the reference value.

Grid resistance ohm

grid_resistance_ohm

Grounding-grid resistance from the separate resistivity model

Scores if within ±3% of the reference value.

Ground potential rise

ground_potential_rise_v

Ground potential rise from grid current and grid resistance

Scores if within ±3% of the reference value.

Gpr margin

gpr_margin_v

Source-pack GPR screening limit minus ground potential rise

Scores if within ±3% of the reference value.

Overall pass score

overall_pass_score

Pass score for SPT, bearing, and GPR source-pack checks

Scores if within ±3% of the reference value.

Difficulty

Each template is sampled at three tiers. Harder tiers may hide inputs, forcing the model to infer them from the scenario description.

All inputs remain visible at every tier

For this template, difficulty scales through parameter and scenario ranges rather than hidden information.

easy:
All source-pack values given for the SSC-07 ground structural-electrical safety package
medium:
All source-pack values given for the SSC-07 ground structural-electrical safety package
hard:
All source-pack values given for the SSC-07 ground structural-electrical safety package

Task bundle

The exact instruction and parameter contract used to generate this task, pinned to the published library source.

/workspace

  • instruction.md
  • ground-structural-electrical-safety-package_calc.py

Teal lines show Jinja input conditions, not task visibility policy. A line renders only when that input or tool is visible.

1You are a geotechnical/electrical earthing engineer checking a task-owned synthetic SSC-07 package for one ground investigation handoff, shallow foundation bearing check, and separate soil-resistivity earthing check.2 3Use only the task-owned synthetic source pack values shown below for numeric grading. External ground-investigation, geotechnical analysis, and earthing-design workflows shape the context only; they are not extra data sources for this instance.4 5## Scene6 7- Ground package: `GND-SSC07-001`8- Borehole log: `BH-07-03`9- CPT record: `CPT-07-02`10- SPT record: `SPT-07-03-06M`11- Groundwater record: `GW-07-WET-001`12- Soil parameter summary: `SOIL-07-PARAM-01`13- Ground interpretation memo: `GIM-07-001`14- Resistivity record: `RES-07-ERT-01`15- Foundation layout: `FDN-07-MAT-01`16- Earthing layout: `GRID-07-EARTH-01`17- Fault case: `FAULT-07-001`18- Safety memo: `MEMO-07-SAFETY-01`19 20The mechanical ground model and the electrical resistivity model are related source-pack artifacts, but they are separate interpretations. Do not reuse the strength model as the resistivity model.21 22## SPT And CPT Basis23 24| Item | Value |25|------|-------|26| Raw SPT N value | {{ raw_n_value }} |27| Effective overburden at SPT depth | {{ effective_overburden_kpa }} kPa |28| Hammer type | {{ hammer_type }} |29| Borehole diameter class | {{ borehole_diameter_mm }} mm |30| Sampler type | {{ sampler_type }} |31| Rod length | {{ rod_length_m }} m |32| Minimum design N1,60 | {{ minimum_design_n1_60 }} |33| CPT cone resistance qc | {{ qc_mpa }} MPa |34| CPT sleeve friction fs | {{ fs_kpa }} kPa |35| CPT pore pressure u2 | {{ u2_kpa }} kPa |36| CPT interpretation depth | {{ cpt_depth_m }} m |37| Total soil unit weight | {{ total_unit_weight_kn_m3 }} kN/m3 |38| Wet-season water table depth | {{ water_table_depth_m }} m |39| CPT net area ratio | {{ net_area_ratio }} |40| Interpreted design friction angle | {{ interpreted_design_phi_deg }} degrees |41 42SPT checks:43 44- Use energy correction `CE = 1.33` for `auto`, borehole correction `CB = 1.00` for `115`, sampler correction `CS = 1.00` for `with_liner`, and rod length correction `CR = 0.95` for an 8 m rod.45- `N60 = raw_n_value x CE x CB x CS x CR`.46- `CN = min(sqrt(100 / effective_overburden_kpa), 2.0)`.47- `N1,60 = N60 x CN`.48- `spt_n1_60_margin = N1,60 - minimum_design_n1_60`.49 50CPT checks:51 52- Corrected cone resistance `qt = qc_mpa + (u2_kpa / 1000) x (1 - net_area_ratio)`.53- Total vertical stress `sigma_v0 = total_unit_weight_kn_m3 x cpt_depth_m`.54- Pore pressure above the CPT depth uses `9.81 x max(cpt_depth_m - water_table_depth_m, 0)`.55- Effective vertical stress `sigma_prime_v0 = sigma_v0 - pore_pressure`.56- Normalized cone resistance `Qt = (qt_kpa - sigma_v0) / sigma_prime_v0`.57- Normalized friction ratio `Fr = fs_kpa / (qt_kpa - sigma_v0) x 100`.58- Soil behavior type index `Ic = sqrt((3.47 - log10(Qt))^2 + (log10(Fr) + 1.22)^2)`.59- If `Ic <= 2.6`, `cpt_phi_deg = 17.6 + 11 x log10(Qt)`; otherwise use `0.0`.60- `governing_phi_deg` is the smaller of `interpreted_design_phi_deg` and `cpt_phi_deg`.61 62## Bearing And Earthing Basis63 64| Item | Value |65|------|-------|66| Effective cohesion | {{ cohesion_kpa }} kPa |67| Footing width | {{ footing_width_m }} m |68| Embedment depth | {{ embedment_depth_m }} m |69| Footing shape | {{ footing_shape }} |70| Bearing factor of safety | {{ factor_of_safety }} |71| Applied service bearing pressure | {{ applied_bearing_pressure_kpa }} kPa |72| Apparent soil resistivity | {{ soil_resistivity_ohm_m }} ohm-m |73| Grid length | {{ grid_length_m }} m |74| Grid width | {{ grid_width_m }} m |75| Total buried conductor length | {{ total_conductor_length_m }} m |76| Burial depth | {{ burial_depth_m }} m |77| Grid current | {{ grid_current_ka }} kA |78| GPR screening limit | {{ gpr_limit_v }} V |79 80Bearing checks:81 82- Use the template's source-bound Terzaghi bearing factors for `governing_phi_deg = 32.0`: `Nc = 44.0357`, `Nq = 28.5166`, and `Ngamma = 27.85`.83- The source-bound convention is `Nq = exp(2 x (3*pi/4 - phi/2) x tan(phi)) / (2 x cos(45deg + phi/2)^2)`, `Nc = (Nq - 1) / tan(phi)`, and linear interpolation of `Ngamma` between 30 degrees (`19.7`) and 34 degrees (`36.0`).84- For a square footing use `sc = 1.3` and `sg = 0.4`.85- Apply the wet-season water-table correction exactly as follows: because `water_table_depth_m = 2.1` is between `embedment_depth_m = 1.2` and `embedment_depth_m + footing_width_m = 3.6`, use `q = total_unit_weight_kn_m3 x embedment_depth_m = 22.2` and `gamma_eff = (total_unit_weight_kn_m3 - 9.81) + ((water_table_depth_m - embedment_depth_m) / footing_width_m) x 9.81 = 12.36875`.86- Do not replace this interpolated `gamma_eff = 12.36875` with the fully submerged unit weight `8.69`.87- `ultimate_bearing_capacity = cohesion_kpa x Nc x sc + q x Nq + gamma_eff x footing_width_m x sg x Ngamma`.88- `allowable_bearing_capacity_kpa = ultimate_bearing_capacity / factor_of_safety`.89- `bearing_utilization = applied_bearing_pressure_kpa / allowable_bearing_capacity_kpa`.90- `bearing_margin_kpa = allowable_bearing_capacity_kpa - applied_bearing_pressure_kpa`.91 92Earthing checks:93 94- Grid area equals `grid_length_m x grid_width_m`.95- `grid_resistance_ohm = soil_resistivity_ohm_m x (1 / total_conductor_length_m + 1 / sqrt(20 x grid_area) x (1 + 1 / (1 + burial_depth_m x sqrt(20 / grid_area))))`.96- `ground_potential_rise_v = grid_current_ka x 1000 x grid_resistance_ohm`.97- `gpr_margin_v = gpr_limit_v - ground_potential_rise_v`.98- `overall_pass_score` is `1.0` only when the SPT N1,60 margin, bearing margin, and GPR margin are all non-negative; otherwise it is `0.0`.99 100## Output Format101 102Write a compact memo to `/workspace/output.md`. Include a source-boundary statement that this is a task-owned synthetic source pack. Explain the calculations briefly, preserve the object IDs above, and state whether the baseline source pack passes the current synthetic checks.103 104Do not claim authority approval, accepted project evidence, software export validity, full standards compliance, executable real source-pack parsing, generated benchmark readiness, or benchmark readiness.105 106Include a fenced JSON block with exactly these numeric keys:107 108```json109{110 "spt_n60": <numeric_value>,111 "spt_n1_60": <numeric_value>,112 "spt_n1_60_margin": <numeric_value>,113 "cpt_qt_mpa": <numeric_value>,114 "cpt_ic": <numeric_value>,115 "cpt_phi_deg": <numeric_value>,116 "governing_phi_deg": <numeric_value>,117 "allowable_bearing_capacity_kpa": <numeric_value>,118 "bearing_utilization": <numeric_value>,119 "bearing_margin_kpa": <numeric_value>,120 "grid_resistance_ohm": <numeric_value>,121 "ground_potential_rise_v": <numeric_value>,122 "gpr_margin_v": <numeric_value>,123 "overall_pass_score": <numeric_value>124}125```126

Scenario archetypes

Each generated task is drawn from one of these realistic scenario bands.

Site contexts ground each scenario in a real locale the model can use to infer hidden values.

Ssc07 ground safety case

ssc07_ground_safety_case

Ground investigation package for one shallow foundation and earthing-grid check

shallow-foundation-earthingground-investigation-handoff
Parameter ranges
raw_n_value
18
effective_overburden_kpa
125
rod_length_m
8
minimum_design_n1_60
15
qc_mpa
12
fs_kpa
60
u2_kpa
25
cpt_depth_m
6
total_unit_weight_kn_m3
18.5
water_table_depth_m
2.1
net_area_ratio
0.8
interpreted_design_phi_deg
32
cohesion_kpa
5
footing_width_m
2.4
embedment_depth_m
1.2
factor_of_safety
3
applied_bearing_pressure_kpa
220
soil_resistivity_ohm_m
85
grid_length_m
32
grid_width_m
24
total_conductor_length_m
360
burial_depth_m
0.6
grid_current_ka
3.2
gpr_limit_v
5000

Example task

shallow-foundation-earthing-ssc07-ground-safety-case-preview — hard difficulty, all inputs given.

Ground investigation package for one shallow foundation and earthing-grid check. shallow-foundation-earthing. Required outputs: spt_n60, spt_n1_60, spt_n1_60_margin, cpt_qt_mpa, cpt_ic, cpt_phi_deg

The model sees

Scenario context and visible inputs.

raw_n_value
18 to 18
effective_overburden_kpa
125 to 125 kPa
hammer_type
auto
borehole_diameter_mm
115 mm
sampler_type
with_liner
rod_length_m
8 to 8 m
minimum_design_n1_60
15 to 15
qc_mpa
12 to 12 MPa
fs_kpa
60 to 60 kPa
u2_kpa
25 to 25 kPa
cpt_depth_m
6 to 6 m
total_unit_weight_kn_m3
18.5 to 18.5 kN/m3
water_table_depth_m
2.1 to 2.1 m
net_area_ratio
0.8 to 0.8
interpreted_design_phi_deg
32 to 32 degrees
cohesion_kpa
5 to 5 kPa
footing_width_m
2.4 to 2.4 m
embedment_depth_m
1.2 to 1.2 m
footing_shape
square
factor_of_safety
3 to 3
applied_bearing_pressure_kpa
220 to 220 kPa
soil_resistivity_ohm_m
85 to 85 ohm-m
grid_length_m
32 to 32 m
grid_width_m
24 to 24 m
total_conductor_length_m
360 to 360 m
burial_depth_m
0.6 to 0.6 m
grid_current_ka
3.2 to 3.2 kA
gpr_limit_v
5000 to 5000 V

Executable tool: ground-structural-electrical-safety-package_calc.py

The model must infer

Inputs withheld at this difficulty.

Nothing. All inputs are supplied.

The model must produce

The scored JSON answer schema.

{
  "spt_n60": <number>,
  "spt_n1_60": <number>,
  "spt_n1_60_margin": <number>,
  "cpt_qt_mpa": <number>,
  "cpt_ic": <number>,
  "cpt_phi_deg": <number>,
  "governing_phi_deg": <number>,
  "allowable_bearing_capacity_kpa": <number>,
  "bearing_utilization": <number>,
  "bearing_margin_kpa": <number>,
  "grid_resistance_ohm": <number>,
  "ground_potential_rise_v": <number>,
  "gpr_margin_v": <number>,
  "overall_pass_score": <number>
}
  • spt_n60 · scored within ±3%
  • spt_n1_60 · scored within ±3%
  • spt_n1_60_margin · scored within ±3%
  • cpt_qt_mpa · scored within ±3%
  • cpt_ic · scored within ±3%
  • cpt_phi_deg · scored within ±3%
  • governing_phi_deg · scored within ±3%
  • allowable_bearing_capacity_kpa · scored within ±3%
  • bearing_utilization · scored within ±3%
  • bearing_margin_kpa · scored within ±3%
  • grid_resistance_ohm · scored within ±3%
  • ground_potential_rise_v · scored within ±3%
  • gpr_margin_v · scored within ±3%
  • overall_pass_score · scored within ±3%