![Deep foundations techniques](/en/sites/keller-algerie-en/files/styles/techniques_listing/public/2019-01/bored-piles-deep-foundations_1.jpg?itok=Xs0hmizp)
![Deep foundations techniques](/en/sites/keller-algerie-en/files/styles/techniques_listing/public/2019-01/bored-piles-deep-foundations_1.jpg?itok=Xs0hmizp)
Deep foundations
Heavy foundations are required whenever weak soils have little capacity to resist an existing load or a change in existing load. They involve the construction of structural elements to transfer loads down to stronger underlying soils or rock.
![Earth retention techniques](/en/sites/keller-algerie-en/files/styles/techniques_listing/public/2019-01/diaphragm-wall-cutter.jpg?itok=FLJFHT7b)
Earth retention
Earth retention retains earth successfully so that it does not move or shift to any unwanted directions.
![Keller ground improvement](/en/sites/keller-algerie-en/files/styles/techniques_listing/public/2019-01/vibro-replacement-stone-columns-ground-improvement_0.jpg?itok=IzNDo-EP)
Ground improvement
With a pedigree of over 20 years' experience and specially manufactured equipment built in Germany, Keller lead the way with these solutions.
![Keller grouting techniques](/en/sites/keller-algerie-en/files/styles/techniques_listing/public/2019-01/jet-grouting_0.jpg?itok=_BLMKFr5)
Grouting
Keller lead the world in grouting technology – with systems for all applications from lifting structures to grouting dam curtains.
![Geotechnical instrumentation and monitoring](/en/sites/keller-algerie-en/files/styles/techniques_listing/public/2019-01/geotechinical-instrumentation-and-monitoring_0.jpg?itok=yPm2dKs8)
Instrumentation and monitoring