01 Substructure Flashcards
Understand Soils, Radon, Types of Foundation and when they are used.
How do ground condition influence the design and type of foundation used?
- Different soil types have diverse load beargin capacity
- Type of trees and proximity to the area of works, if less than 30m the trees can impact the foundation.
- History of the site i.e. contaminated land, mining
- Ground water table levels affects the load bearing capacity of the soil
What is meant by the term water table and how does if affect construction?
What is a CBR (Carlifonia Bearing Ratio) test?
What is Vane shear testing?
Describe the different ways of dealing with water in excavations?
What is the purpose of foundations?
To safely sustain and transmit the the combined dead, imposed and environmental loads in such a manner as not to cause settlement or any movement.
The type of foundation is determined the existing ground conditions and trees - presence/absence.
Describe the different ways of dealing with ground water in excavations?
What factors would you need to consider when designing foundations?
- Soil type
- Water Table
- Proximity to trees
Name some different types of foundations
A. Strip
B. Raft
C. Pile
What is a strip foundation?
What material have commonly been used for strip foundations?
Under what conditions would you expect a strip foundation to be used for a substructure?
What is the difference between a strip foundation and deep strip foundation and why might the latter be adventageous?
Why did deep strip foundations become common?
What is a raft foundation?
Under what conditions would you expect a raft foundation to be used?
Where would you expect to find the main reinforcement in a raft foundation to be used and why?
What are pile foundations
When did pile foundations start being used?
Under what condition would you expect a pile foundation to be used for supstructure?
What different types of piling are you familiar with?
How can pile foundations be installed?
Describe the components of a piled substructure and their functions.
What ancillary activities are carried out in connection with piling.
What is a pier foundation?
Where would you expect to find the main reinforcement in a pad foundation?
Under what conditions would you expect a pier foundation be used for substructure?
Describe the substructure of a building on one of your projects?
