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Geotechnical Engineering

How to Analyse Retaining Walls for Trapezoidal Load

In the analysis of retaining walls subjected to earth pressure, it is very common to observe trapezoidal load distribution on the walls. Normally, earth...

A simpler Approach to the Design of Ground Beams Using Staad Pro

Ground beams are employed in reinforced concrete substructures for a lot of reasons. Ground beams can be differentiated from plinth beams due to a...

Provision of Longitudinal Reinforcement in Piles: Solved Example

Precast piles are designed to withstand stresses caused during their installation, and the load from their service life. Bored piles on the other hand...

Determination of Bearing Capacity of Shallow Foundations

Soil investigation is one of the most important activities carried out before the commencement of any construction project. In the soil test report, the...

Calculation of Settlement of Spread Foundation (EC7 Part 2)

In this post, we are going to talk about an approach described in Annex E of EN 1997-2:2006 (Eurocode 7 Part 2) for determining...

Design of Piles in Sand: Case Study of Lekki Pennisula, Lagos Nigeria

1.0 Introduction Construction experts in Lagos Island, Nigeria are no strangers to pile foundation. The poor soil profile in the area means that foundations are...

Structural Design of Flat Raft Foundation (Rigid Approach)

Introduction The conventional rigid combined footing approach is a method of analysing raft foundation using simple statics without any consideration of the elastic properties of...

Structural Design of Combined Footings: Solved Example to Eurocode 2

Introduction Combined footings are normally employed in cases where two or more columns are closely spaced such that their individual pad footings would overlap each...

Design of Pile Foundation Using Pile Load Test (Eurocode 7)

Pile load test is the most reliable method of estimating the load carrying capacity of a pile, but it is rather expensive. Load tests...

Increment of Stress in Soil Under A Pad Foundation

When foundations are constructed, they increase the net pressure that the soil mass under the foundation experiences. The knowledge of this is very important...

Design of Cantilever Retaining Wall Supporting Lateritic Earth Fill

Cohesive soil profiles due to their nature are partially self supporting up to an extent called the critical depth (the critical depth is given...

Solved Example on Elastic Settlement of Shallow Foundations

This post presents a solved example on elastic settlement of shallow foundations. Foundation settlement is mainly made up of elastic (or immediate) settlement, Se,...

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Specification of Concrete for Water Retaining Structures

In the year 2017, we made a successful publication on Analysis and Design of Swimming Pools and Underground Water Tanks. In this post, we...

Comparative Design of Triangular Pile Cap with free PDF download

In our post on Structural Aspects of Pile Foundation Design, we showed how we can determine the number piles required to support...

What Engineers and Architects Should Know About Site Instruction

A site instruction is a formal written order given by the heads of a project to contractors or sub-contractors on specific projects issues such...

Structural Aspects of Pile Foundation Design: A Practical Example

Geotechnical engineers are expected to hand over soil investigation report to structural engineers, who will proceed to provide the longitudinal reinforcements needed for the...