---
title: "Methods of lateral stability analysis of well"
subject: "Foundation Engineering"
chapter: 9
key: "semester_5/foundation_engineering:well-lateral-stability-methods"
source: https://www.bctengineer.com/q/semester_5/foundation_engineering/well-lateral-stability-methods
site: BCT Engineering
---

# Methods of lateral stability analysis of well

Foundation Engineering · Chapter 9: Well Foundations

- Asked in: 2075 Chaitra, 1 marks; 2072 Chaitra, 2 marks (asked 2 times)
- Video: [Lateral Stability of Well Foundation](https://www.youtube.com/watch?v=iQOO8RzL7bY) — Civil Giri
- Answer checked by Claude Sonnet 5.5 on 2026-10-14
- Page: https://www.bctengineer.com/q/semester_5/foundation_engineering/well-lateral-stability-methods
- Whole chapter: https://www.bctengineer.com/md/semester_5/foundation_engineering/chapter-9

## Question

Name the different methods to analyze the lateral stability of a well foundation.

## Short answer

Methods are Terzaghi's simplified analysis (light and heavy wells), IRC:45 method (modified Terzaghi), Banerjee and Gupta's elastic/subgrade reaction approach, subgrade reaction (Winkler) method, and finite element methods for complex cases.

## Answer

The lateral stability of a well foundation (resistance to horizontal force and moment) is analysed by:
1. **Terzaghi's analysis** (simplified), for light and heavy wells.
2. **IRC:45 method** (the Indian Roads Congress code, based on the modified Terzaghi method).
3. **Banerjee and Gupta's method** (the elastic / subgrade-reaction approach).
4. **Subgrade reaction (Winkler) method.**
5. **Finite element methods** for complex cases.

## Check yourself

The answer's key points as multiple-choice questions, with the correct option and why.

1. The simplified method for lateral stability of wells is due to:
   A. Rankine
   B. Coulomb
   C. Boussinesq
   D. Terzaghi
   Answer: D. Terzaghi's simplified analysis is used for light and heavy wells. (Key point: Simplified method)

2. IRC:45 method is:
   A. An FEM method
   B. Based on modified Terzaghi method
   C. A pile method
   D. A drilling method
   Answer: B. IRC:45 is the code method based on modified Terzaghi. (Key point: Code method)

3. Banerjee and Gupta's method uses:
   A. Active earth pressure only
   B. Rigid body only
   C. Seepage analysis
   D. Elastic subgrade reaction approach
   Answer: D. It is an elastic/subgrade-reaction approach, like the Winkler method. (Key point: Elastic approach)

## Related in Foundation Engineering

- [Terzaghi lateral stability, light well](https://www.bctengineer.com/question.md?key=semester_5%2Ffoundation_engineering%3Awell-lateral-stability-light-derive) — Foundation Engineering, chapter 9
- [Components of well foundation with sketch](https://www.bctengineer.com/question.md?key=semester_5%2Ffoundation_engineering%3Awell-components-sketch) — Foundation Engineering, chapter 9, asked 9×
- [When well foundation is suitable](https://www.bctengineer.com/question.md?key=semester_5%2Ffoundation_engineering%3Awell-suitability-advantages) — Foundation Engineering, chapter 9, asked 2×
- [Forces acting on well foundation](https://www.bctengineer.com/question.md?key=semester_5%2Ffoundation_engineering%3Awell-forces) — Foundation Engineering, chapter 9, asked 2×
- [Depth and lateral extent of exploration](https://www.bctengineer.com/question.md?key=semester_5%2Ffoundation_engineering%3Adepth-lateral-extent-exploration) — Foundation Engineering, chapter 2, asked 5×
- [Circular well 4 m, light and heavy well](https://www.bctengineer.com/question.md?key=semester_5%2Ffoundation_engineering%3Acircular-well-4m-light-heavy) — Foundation Engineering, chapter 9

## Related in other subjects

- [Well foundation: excavation, sinking, brick, PCC curb](https://www.bctengineer.com/question.md?key=semester_7%2Festimating_and_costing%3Awell-foundation-d-four-items) — Estimating and Costing, chapter 6, asked 2×
- [Well foundation: sinking, brick, sand filling, PCC](https://www.bctengineer.com/question.md?key=semester_7%2Festimating_and_costing%3Awell-foundation-g-sand-filling) — Estimating and Costing, chapter 6, asked 2×
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- [Well foundation, 4.5 m internal diameter](https://www.bctengineer.com/question.md?key=semester_7%2Festimating_and_costing%3Awell-foundation-4-5m-p) — Estimating and Costing, chapter 6, asked 2×