13 Questions
What is a collapsible soil?
A soil that exhibits a large decrease in strength at moisture contents approaching saturation
What are collapsible soils also known as?
Metastable soils
What factors are needed to produce collapse in a soil structure?
Open, partially unstable, unsaturated fabric and high net total stress
In what type of regions are collapsible soils typically encountered?
Arid and semi-arid regions
What is primarily related to the collapse phenomenon of collapsible soils?
The open structure of the soil
What is the effect of the addition of water to collapsible soil?
It reduces the bonding or cementing agent, causing intergranular contacts to fail in shear
What is the primary factor contributing to the collapse of weak soils when water is added?
Thickness of the collapsible strata
Which of the following is NOT a factor influencing the amount of collapse in weak soils when water is provided?
Type of soil particles
How can the load-bearing capacity of weak soils be improved?
Using stronger footings to withstand possible differential settlements
What characteristic makes collapsible soils unsuitable for any types of foundations or pavements in their original or natural conditions?
Low bearing capacity when wetted
What is essential once a soil shows indications of collapse potential?
Direct measurement of the magnitude of collapse using laboratory tests
Which method has shown significant reduction in the settlement of collapsible soils?
Soil replacement
In what cases are strip foundations commonly used?
When the depth of collapsing soil is shallow
Test your knowledge about collapsible soil and its treatment with this quiz covering the characteristics and behavior of collapsible soils, as well as the potential structural damage they can cause. Learn more about the concept of collapsible soils and how to mitigate the risks associated with them.
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