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Liquefaction Potential Index (LPI) Borehole Profile Calculator

Easily calculate and compute liquefaction potential index (lpi) borehole profile calculator with accurate equations, live formulas, and expert guidance.

Boulanger-Idriss factor of safety against liquefaction (CRR / CSR).

Factor of safety against liquefaction in layer 2.

Factor of safety against liquefaction in layer 3.

Factor of safety against liquefaction in layer 4.

Calculated Result
14.1

Liquefaction Potential Index (LPI)

Liquefaction Potential Index (LPI)

14.1

Liquefaction Potential Index Lpi

14.1

Iwasaki Risk Classification

High Risk (5 < LPI <= 15: Significant Ground Cracking Likely)

Layer1 Contribution0to5m

10.9

Layer2 Contribution5to10m

3.1

14.1

Calculation Breakdown

  1. Applied FormulaIntegrates the Iwasaki (1982) depth-weighted Liquefaction Potential Index (LPI) over the upper 20 meters of a geotechnical soil borehole to evaluate surface manifestation severity.\text{LPI} = \int_{0}^{20} F(z) (10 - 0.5z) dz, \quad F(z) = \max(0, 1 - FS_L)

Liquefaction Potential Index Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.03.57.01114Liquefaction Potential Index (LPI)

What Is the Liquefaction Potential Index (LPI) Borehole Profile Calculator?

This tool computes liquefaction potential index (lpi) borehole profile calculator with high precision arithmetic.

How Does the Liquefaction Potential Index (LPI) Borehole Profile Calculator Work?

Integrates the Iwasaki (1982) depth-weighted Liquefaction Potential Index (LPI) over the upper 20 meters of a geotechnical soil borehole to evaluate surface manifestation severity.

Liquefaction Potential Index (LPI) Borehole Profile Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

LPI=∫020F(z)(10−0.5z)dz,F(z)=max⁡(0,1−FSL)\text{LPI} = \int_{0}^{20} F(z) (10 - 0.5z) dz, \quad F(z) = \max(0, 1 - FS_L)

Integrates the Iwasaki (1982) depth-weighted Liquefaction Potential Index (LPI) over the upper 20 meters of a geotechnical soil borehole to evaluate surface manifestation severity.

How to Use the Liquefaction Potential Index (LPI) Borehole Profile Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Liquefaction Potential Index (LPI) Borehole Profile Calculator Example

Input Values:

factorOfSafetyFsLayer1:0.75
factorOfSafetyFsLayer2:0.90
factorOfSafetyFsLayer3:1.20
factorOfSafetyFsLayer4:1.45
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required Liquefaction Potential Index (LPI).

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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