cohesionless soil: meaning, definition, pronunciation and examples
C2Technical / Academic
Quick answer
What does “cohesionless soil” mean?
A type of soil, such as sand or gravel, whose particles lack inherent stickiness or cohesive strength.
Audio
Pronunciation
Definition
Meaning and Definition
A type of soil, such as sand or gravel, whose particles lack inherent stickiness or cohesive strength.
In geotechnical engineering, a granular soil that derives its shear strength primarily from friction between particles and interlocking, rather than from chemical bonds or cohesive forces. It cannot be molded when moist and crumbles easily.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling follows regional norms (e.g., 'behaviour' vs. 'behavior' in surrounding text).
Connotations
Identical technical connotations in both varieties.
Frequency
Equally low frequency and confined to technical contexts in both regions.
Grammar
How to Use “cohesionless soil” in a Sentence
The [foundation/analysis] considered the site's cohesionless soil.Cohesionless soil [exhibits/undergoes/lacks] cohesion.Vocabulary
Collocations
Examples
Examples of “cohesionless soil” in a Sentence
adjective
British English
- The cohesionless soil strata posed a significant engineering challenge.
American English
- A cohesionless soil layer was identified during the drilling.
Usage
Meaning in Context
Business
Rare. Might appear in construction project risk reports: 'Cost overruns are likely due to the presence of cohesionless soil requiring deeper pilings.'
Academic
Primary context. Used in geology, civil engineering, and geotechnical papers: 'The angle of internal friction is a key parameter for cohesionless soil.'
Everyday
Virtually never used.
Technical
Standard term in geotechnical engineering, site investigation reports, and foundation design manuals.
Vocabulary
Synonyms of “cohesionless soil”
Strong
Neutral
Weak
Vocabulary
Antonyms of “cohesionless soil”
Watch out
Common Mistakes When Using “cohesionless soil”
- Using 'incohesive soil' (non-standard).
- Treating it as a general synonym for 'sand'.
- Misspelling as 'cohesion-less soil' (hyphen often omitted in modern technical writing).
FAQ
Frequently Asked Questions
No. Sand is a common example, but cohesionless soil is a broader category including gravel, silt, and other non-plastic, granular soils.
By definition, it has negligible inherent cohesion. Apparent cohesion can temporarily exist from moisture (surface tension) or cementation, but true cohesion is absent.
During seismic shaking, saturated, loose cohesionless soil can lose its frictional strength as water pressure increases, causing it to behave like a liquid.
Generally uncountable when referring to the material ('The site contains cohesionless soil'). It can be countable when referring to distinct types or layers ('Several cohesionless soils were encountered').
A type of soil, such as sand or gravel, whose particles lack inherent stickiness or cohesive strength.
Cohesionless soil is usually technical / academic in register.
Cohesionless soil: in British English it is pronounced /kəʊˈhiːʒənləs sɔɪl/, and in American English it is pronounced /koʊˈhiːʒənləs sɔɪl/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of a sandcastle that collapses when dry—the sand lacks 'cohesion'. Cohesionless soil is like that dry sand: its particles don't stick together.
Conceptual Metaphor
SOIL IS A BONDED MATERIAL (where cohesionless soil represents a failed or absent bond).
Practice
Quiz
What is the primary source of shear strength in cohesionless soil?