17 Questions
What is the purpose of Vertical Strip Drains (VSD)?
To provide drainage paths for pore water in soft compressible soil
How are wick drains inserted into the ground using the mandrel?
Using a vibratory hammer or static method
What happens to the mandrel after the wick drain is inserted?
The mandrel is extracted, leaving the wick drain in place
Which statement best describes the function of the geotextile filter-wrapped plastic strips used in VSD?
They provide drainage paths for pore water
Why is a pattern of installed vertical wick drains beneficial in the consolidation process?
It provides short drainage paths for pore water
What is one benefit of plowing green manures back into the soil?
Reducing the need for synthetic fertilizers
How do cover crops differ from green manures in terms of nitrogen fixation?
Green manures fix atmospheric nitrogen, cover crops do not
What is a potential challenge when implementing green manure fields?
Additional equipment and labor requirements
Which factor affects the overall effectiveness of different green manure species?
Persistence level in the soil
What do cover crops help to suppress?
Weed growth
How do cover crops contribute to increasing organic matter in the soil?
By generating biomass that can be incorporated into the soil
What is the main goal of soil improvement?
Supporting vegetation growth
Which method of soil improvement involves adding materials like compost and manure to the soil?
Soil amending
What do soil amendments do over time?
Release nutrients into the soil
Which practice helps maintain soil health by preventing erosion and controlling pests and diseases?
Crop rotation
What kind of species are typically planted in green manure practices for nitrogen production?
Legumes like clover and alfalfa
In agriculture, what is another term for growing different crops in sequence on the same land?
Crop rotation
Learn about Vertical Strip Drains (VSD), a ground improvement technique used in soft compressible soil to provide drainage paths for pore water. This technique involves using prefabricated geotextile filter-wrapped plastic strips with molded channels, a hollow mandrel mounted on an excavator or crane mast, and a vibratory hammer or static method for insertion.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
