Struct FoundationSoil 

pub struct FoundationSoil {
    pub cu: f64,
    pub phi_deg: f64,
    pub c_prime: f64,
    pub gamma: f64,
    pub spt_n: u32,
    pub constrained_modulus: f64,
}

Foundation soil properties for bearing capacity analysis.

Fields

cu: f64

Undrained shear strength cu (kPa) for cohesive soils.

phi_deg: f64

Effective internal friction angle φ’ (degrees).

c_prime: f64

Cohesion c’ (kPa) for c-φ soil.

gamma: f64

Soil unit weight γ (kN/m³).

spt_n: u32

SPT N-value (blows per 300mm).

constrained_modulus: f64

Constrained modulus D (MPa) for settlement.

Implementations

impl FoundationSoil

pub fn medium_clay() -> Self

Create a typical medium stiff clay.

pub fn ultimate_bearing_capacity(&self, b: f64, df: f64) -> f64

Ultimate bearing capacity by Terzaghi (strip footing, general shear).

b = footing width (m), df = depth of foundation (m).

pub fn allowable_bearing_capacity(&self, b: f64, df: f64) -> f64

Allowable bearing capacity with factor of safety FOS = 3.

pub fn immediate_settlement(&self, q: f64, b: f64, es_mpa: f64, nu: f64) -> f64

Immediate settlement by Boussinesq (elastic, uniform load).

q = net foundation pressure (kPa), b = footing width (m), es = Young’s modulus of soil (MPa), nu = Poisson’s ratio.