HOMEWORK 8- Foundations, Wood& Concrete Construction Points: 100 Question 1. (35
ID: 1866652 • Letter: H
Question
HOMEWORK 8- Foundations, Wood& Concrete Construction Points: 100 Question 1. (35 Points) a) Explain how does a pile support its applied load and describe the various types of piles. b) What three methods meet OSHA requirements for protecting workers in an excavation c) Explain the significance of soil's effective grain size to the process of dewatering the soil. d) Briefly describe the four major types of pressure grouting Question 2. (35 Points) Explain types of Wood used for construction& its properties. Define Frame Construction and briefly explan two types of frame construction. List the common errors in Truss installation Briefly expalin timber construction. a) b) c) d) Question 3. (30 Points) a) b) c) List various cost components in a reinforced concrete construction and explain the largest component Briefly discuss the advantages and disadvantages of precast, prestressed concrete as compared to cast-in-place concrete What test may be performed on plastic concrete delivered to the job site to ensure that it meets the specification requirements? How might a rapid strength test be performed on plastic concreteExplanation / Answer
Q.(1)
(a) Answer:- Piles resist applied load through skin friction and end bearing.
Qu = Qs + Qe
Skin friction and end bearing resist all applied load on pile.
Types of piles:-
(i) Bored pile
(ii) End bearing pile
(iii) Driven pile
(iv) Friction pile
(b) Answer:- Three method of protecting workers in an excavation:-
(i) Sloping
(ii) Trench boxes
(iii) Shoring
(c) Answer:- Dewatering process is based on size of soil. It is not effective in fine grained soil.In sandy soil dewatering system is very useful.Dewatering is process of removal of water from foundation when it is situated below the ground water table.
(d) Answer:- Types of pressure grouting:-
(i) Polyurethane grouting
(ii) Cemetitious grouting
(iii) Chemical grouting
(iv) Cellular concrete grouting
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