Pile Load Tests

Q. A static cone penetration test is usually conducted when the structure is likely to be founded on which of the following?

1. Shallow foundations
2. Pile foundations
3. Drier foundation
4. Improved ground

Q. Pile is tested under pile load test and the settlement under various loads is given in the table below.

Load	Settlement
250 kN 350 kN 400 kN 500 kN 560 kN 600 kN	10 mm 20 mm 30 mm 40 mm 50 mm 60 mm

If diameter of the pile is 400 mm then allowable load on the pile will be (as per IS code recommendation)

1. 500 kN
2. 445 kN
3. 350 kN
4. 250 kN

Q. Match the items of List I with List II and select the correct answer using the codes given below the list.

$\begin{array}{cccc}\text{(A)}& \text{Modulus of subgrade reaction}& \text{1.}& \text{Cyclic pile load test}\\ \text{(B)}& \text{Relative density and strength}& \text{2.}& \text{Pressure meter test}\\ \text{(C)}& \text{Skin friction and point bearing resistance}& \text{3.}& \text{Plate load test}\\ \text{(D)}& \text{Elastic constants}& \text{4.}& \text{Standard penetration tests}\\ & & 5.& \text{Dynamic cone penetration test}\end{array}$

1. $\begin{array}{cccc}\text{A}& \text{B}& \text{C}& \text{D}\\ \text{1}& \text{3}& \text{2}& \text{5}\end{array}$
2. $\begin{array}{cccc}\text{A}& \text{B}& \text{C}& \text{D}\\ \text{1}& \text{2}& \text{4}& \text{3}\end{array}$
3. $\begin{array}{cccc}\text{A}& \text{B}& \text{C}& \text{D}\\ \text{2}& \text{5}& \text{1}& \text{3}\end{array}$
4. $\begin{array}{cccc}\text{A}& \text{B}& \text{C}& \text{D}\\ \text{3}& \text{4}& \text{1}& \text{2}\end{array}$

Q. Match List-I (Method of estimating pile capacity) with List-II (Parameter to be estimated) and select the correct answer using the codes given below the lists:

List-I
A. Dynamic formulae
B. Static formulae
C. Pile load test
D. Cyclic pile load test

List - II

1. Bearing capacity of cast-in-situ concrete pile
2. Separating end-bearing and friction-bearing powers of a pile
3. Bearing capacity of a timber pile
4. Settlement of a friction bearing pile

Codes :

A B C D

1. 3 1 4 2
2. 4 2 3 1
3. 3 2 4 1
4. 4 1 3 2

Q. For the following statements:

P - The lateral stress in the soil while being tested in an oedometer is always at-rest.

Q - For a perfectly rigid strip footing at deeper depths in a sand deposit, the vertical normal contact stress at the footing edge is greater than that at its centre.

R - The corrections for overburden pressure and dilatancy are not applied to measured SPT-N values in case of clay deposits.
The correct combination of the statements is ?

1. P - TRUE; Q - TRUE; R - FALSE
2. P - TRUE; Q - TRUE; R - TRUE
3. P - FALSE; Q - FALSE; R - TRUE
4. P - FALSE; Q - FALSE; R - FALSE

Q. Match List-I (Soil property measured) with List-II (in-situ test) and select the correct answer using the codes given below the lists:

List-I
A. Modulus of subgrade reaction
B. Relative density and strength
C. Skin friction and point bearing
D. Elastic constants

List-II

1. Cyclic pile load test
2. Pressuremeter test
3. Plate load test
4. Standard penetration test

Codes:

A B C D

1. 1 3 2 4
2. 1 2 4 3
3. 2 4 1 3
4. 3 4 1 2

Q. Consider the following statements :

1. Initial load test and routine load tests are carried out on test piles and working piles, respectively.
2. In a pile load test, the allowable load can be taken equal to half the ultimate load at which the total settlement amounts to one-tenth of the pile diameter.
3. In a pile load test, the allowable load can be taken equal to two-thirds of the total load which causes a plastic settlement of 6 mm.

Which of the above statements are correct?

1. 1, 2 and 3
2. 1 and 2 only
3. 1 and 3 only
4. 2 and 3 only

Q. Match List-I (Method) with List-II (Suitability) and select the correct answer using the codes given below the lists:

List-I
A. Static formulae
B. Dynamic formulae
C. Static pile load test
D. Cyclic pile load test

List-II

1. To estimate allowable load for permissible settlement for a pile
2. To separate point bearing and friction bearing capacities of a pile
3. To estimate allowable load for driven piles in granular soils
4. To estimate allowable load for bored piles in clays

Codes :

A B C D

1. 4 2 1 3
2. 1 3 4 2
3. 4 3 1 2
4. 1 2 4 3

Q. Consider the following statements:

1. Initial load tests and routine tests are carried out on test piles and working piles, respectively.
2. A cyclic load test is performed to determine a pile's skin resistance and base resistance separately.
3. In a pile load test, the safe load is taken as half the final load at which the settlement equals 10% of pile-diameter.

Which of these statements are correct?

1. 1, 2 and 3
2. Only 1 and 2
3. Only 2 and 3
4. Only 1 and 3