Podcast
Questions and Answers
What is the main objective of earthworks in construction projects?
What is the main objective of earthworks in construction projects?
- To build embankments for water control
- To create a level required for subsequent construction items (correct)
- To provide a path for pedestrian access
- To create small trenches for planting purposes
Which factors determine whether excavation is carried out by hand, mechanically, or both?
Which factors determine whether excavation is carried out by hand, mechanically, or both?
- Soil conditions, shape of cut section, ground water, and time required (correct)
- Project location, weather conditions, contractor's preference, and soil fertility
- Budget, availability of equipment, duration of project, and soil type
- Type of construction, architectural design, material availability, and labor cost
What are the typical applications of hand (manual) excavation?
What are the typical applications of hand (manual) excavation?
- Continuous wall foundation and isolated foundation (correct)
- Waterfront construction and marine engineering
- Building high-rise structures and skyscrapers
- Road construction and highway development
Why is hand excavation not used with rock soil?
Why is hand excavation not used with rock soil?
When is mechanical excavation typically used?
When is mechanical excavation typically used?
What should be left during hand excavation to allow for easy concrete works?
What should be left during hand excavation to allow for easy concrete works?
What is the maximum loose depth for depositing layers of filling for roads, yards, and parking areas?
What is the maximum loose depth for depositing layers of filling for roads, yards, and parking areas?
Which method of removing ground water involves making trenches at the lowest level of excavated pits and leaving the water to accumulate?
Which method of removing ground water involves making trenches at the lowest level of excavated pits and leaving the water to accumulate?
What could continuous pumping from an excavation potentially cause?
What could continuous pumping from an excavation potentially cause?
What is used for heavy work to remove ground water, consisting of a group of metal pipes with filter and valve at the end?
What is used for heavy work to remove ground water, consisting of a group of metal pipes with filter and valve at the end?
What should be provided to prevent excessive mud and grit from being sucked up during pumping?
What should be provided to prevent excessive mud and grit from being sucked up during pumping?
What should backfilling generally consist of?
What should backfilling generally consist of?
'All filling shall be deposited in layers, not exceeding __________ loose depths.'
'All filling shall be deposited in layers, not exceeding __________ loose depths.'
'Material for refilling around buildings and other zones may consist of __________ but no rubbish material to be permitted.'
'Material for refilling around buildings and other zones may consist of __________ but no rubbish material to be permitted.'
'For roads, yards and parking areas, all filling up to underside of the Sub-base shall be of a material suitable for __________ compaction.'
'For roads, yards and parking areas, all filling up to underside of the Sub-base shall be of a material suitable for __________ compaction.'
'An indication of the way ground water control should be done can often be gained from the __________ report on trial pits.'
'An indication of the way ground water control should be done can often be gained from the __________ report on trial pits.'
Hand (Manual) excavation can be used for small jobs such as continuous wall foundation and isolated foundation.
Hand (Manual) excavation can be used for small jobs such as continuous wall foundation and isolated foundation.
Mechanical excavation is typically used for small quantity jobs.
Mechanical excavation is typically used for small quantity jobs.
Excavation works include basements, sewer, and shallow combined foundation.
Excavation works include basements, sewer, and shallow combined foundation.
The objective of earthworks is to reach the required level for constructing roads and parking areas.
The objective of earthworks is to reach the required level for constructing roads and parking areas.
Hand excavation is used with rock soil due to its efficiency in such conditions.
Hand excavation is used with rock soil due to its efficiency in such conditions.
The well points system is a cheaper method of removing ground water compared to the direct remove method.
The well points system is a cheaper method of removing ground water compared to the direct remove method.
Mechanical excavation is typically used for removing ground water from open sites.
Mechanical excavation is typically used for removing ground water from open sites.
Hand excavation is generally not used with rock soil due to its difficulty of removal and the need for specialized equipment.
Hand excavation is generally not used with rock soil due to its difficulty of removal and the need for specialized equipment.
Ground water can be discharged directly into road gullies during pumping without any restrictions.
Ground water can be discharged directly into road gullies during pumping without any restrictions.
The material for refilling around buildings and other zones may consist of excavated material as well as rubbish material.
The material for refilling around buildings and other zones may consist of excavated material as well as rubbish material.
