Sand Drain Preloading Calculation Spreadsheet – Eurocode 7

This Sand Drain Preloading Calculation Spreadsheet is a professional Excel template developed for geotechnical engineers working on soft ground improvement projects. It supports the practical design and checking of sand drain systems combined with surcharge preloading, with a structured workflow for settlement, consolidation, and stability assessment.

The workbook is designed for engineering use in preliminary design, internal design review, and project calculation packages. It is presented in English and organized for EU-facing professional workflows.

Key functions included

• Sand drain geometry and layout inputs

• Preloading and surcharge calculation workflow

• Settlement and consolidation assessment

• Degree of consolidation at target time

• Stability check after consolidation

• Structured calculation sheets and engineering summary tables

• Editable input sections for project-specific adaptation

Suitable for

• Soft clay and compressible soil improvement studies

• Road embankments and platform construction on weak ground

• Preloading design with vertical drainage measures

• Internal geotechnical design calculations

• Consultants, contractors, and engineering teams preparing design spreadsheets for EU projects

Why this spreadsheet is useful

• Saves time in repetitive geotechnical calculations

• Converts engineering workflow into a structured Excel format

• Easier checking, review, and reuse across multiple projects

• Clear English presentation for international and EU clients

• Practical template for settlement and stability verification

Important note

This spreadsheet is a professional engineering calculation template and design aid. It is described as Eurocode 7 aligned in design framework and presentation, but project-specific assumptions, National Annex requirements, soil parameters, field investigation data, and engineering judgment remain the responsibility of the designer.