Geotechnical Engineering

Cased Cast-in-Situ Concrete Piles

Question 1
Marks : +2 | -2
Pass Ratio : 100%
Western button bottom piles uses ________ for driving.
Concrete plug
Auger
Conical shoe
Under-reamer
Explanation:
The western button pile uses a concrete plug, of the shape of a button to form an enlarged hole in the soil for driving.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
Who was the first to develop a method for placing cast-in-situ concrete piles?
McArthur
A.M. Wellington
Raymond
Hiley
Explanation:
In 1897, A.A. Raymond patented the Raymond pile system and was first develop a practical, economical way of placing cast-in-situ concrete piles.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Raymond concrete pile is reinforced with _________
Corrugated steel shell
Steel mandrel
Steel bars
None of the mentioned
Explanation:
The Raymond standard concrete pile consists of thin corrugated sheet steel closed at the bottom that acts as a reinforcement.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
Bored compaction piles are the modification of __________
Composite piles
End bearing piles
Compaction piles
Under-reamed piles
Explanation:
Bored compaction piles are the modification of under-reamed piles. These piles are also cast-in-situ piles, same as under-reamed piles.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
The type of cased piles used in soil, where the driving is very hard?
McArthur cased pile
Raymond standard pile
Western button bottom piles
Swage pile
Explanation:
Swage piles are used with advantage in some soil where it is designed to leave watertight shell for some time before filling the concrete.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Cased cast-in-situ piles are suitable for _________ conditions.
Seasonal moisture change
Dry condition
All ground conditions
All of the mentioned
Explanation:
Cased cast-in-situ piles are suitable in practically all ground conditions.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
One of the main advantages of using cased piles are _________
On-the-job-length flexibility and Internal inspection after being driven
Protect concrete fillings
None of the mentioned
All of the mentioned
Explanation:
The advantages of using cased piles are the on-the-job length flexibility, internal inspection after it is driven.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
The piles that are suitable for end-bearing to friction friction-load carrying soils is _________
Swage piles
Union metal monotone piles
McArthur cased piles
Western button pile
Explanation:
Monotube piles use tapered fluted steel without mandrel, so they are suitable for a wide variety of soil conditions, from end-bearing to friction-load-carrying soils.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
The Raymond standard pile is used primarily as a________
Compaction pile
Tension pile
Friction pile
End bearing pile
Explanation:
The Raymond standard pile is used primarily as a friction pile since its uniform heavy taper of 1 in 30 usually results in shorter piles.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
The types of Raymond concrete piles in use are __________
Raymond standard concrete pile and Raymond step-taper pile
Raymond cased pile
None of the mentioned
All of the mentioned
Explanation:
At present, two types of Raymond piles are in use i) Raymond standard concrete pile and ii) Raymond step-taper concrete pile.