Question No.1 a) Explain with the use of graphs, the 3 major parameters and their importance that are obtained from a laboratory consolidation test. b) Use sketches to show how to determine the pre- consolidation pressure for an over consolidated soil from its e vs log P curve. c) How do you find the field consolidation curve (line) for an over consolidated clay? Illustrate with diagrams. What important soil parameter is obtained from the curve (line) and how.

Question No.1 a) Explain with the use of graphs, the 3 major parameters and their importance that are obtained from a laboratory consolidation test. b) Use sketches to show how to determine the pre- consolidation pressure for an over consolidated soil from its e vs log P curve. c) How do you find the field consolidation curve (line) for an over consolidated clay? Illustrate with diagrams. What important soil parameter is obtained from the curve (line) and how.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question No.1 a) Explain with the use of graphs, the 3 major parameters and their importance that are obtained from a laboratory consolidation test. b) Use sketches to show how to determine the pre- consolidation pressure for an over consolidated soil from its e vs log P curve. c) How do you find the field consolidation curve (line) for an over consolidated clay? Illustrate with diagrams. What important soil parameter is obtained from the curve (line) and how.
Q1- In an Odometer test a specimen of saturated clay 26 mm thick reaches58% consolidation in 31 min. How long would it take a layer of this clay 5.8 m thick to reach the same degree of consolidation under the same stress and drainage condition? How long would it take the layer to reach 68% consolidation? What is the degree of consolidation after 2 and 28 years?
1.In an oedometer test a specimen of saturated clay 19 mm thick reaches 50%consolidation in 20 min. How long would it take a layer of this clay 5 m thick toreach the same degree of consolidation under the same stress and drainageconditions? How long would it take the layer to reach 30% consolidation?
Kindly answe the question in the image given below (Q3)
Two identically clay samples of the same size designated as A and B are subjected to consolidation under identical conditions. Drainage takes place through one face in sample A and through both the faces in sample B. 50% consolidation of sample A occurs in 10 minutes. The time required for 50 % consolidation to occur in sample B in minutes will be. (a) 40 (c) 5 (b) 10 (d) 2.5
(a) With the aid of sketches, explain Terzaghi's Spring Analogy Model. A typical one-dimensional consolidation test sample is 2 cm in height and 5 cm in diameter. Explain the possible reason why the diameter of the consolidation test specimen is much larger than the height. (b)
Q₂/ From the result which obtained from consolidation test on a sample of clay soil at depth (3.5 m). Show if the soil is (N.C.C) or (O.C.C), if you know: (y sat = 18.82 kN/m³). Pressure Void ratio 0 0.903 25 0.865 50 0.843 100 0.795 200 0.730 400 0.651 800 0.555 1600 0.468 400 0.501 100 0.547 25 0.583 0 0.612
A soil sample having initial void ratio 0.75and thickness 20 mm is subjected toconsolidation test. Initially the dial gaugewas set to zero. At the end of consolidation,the final dial gauge reading was observedto be 0.25 mm. The final void ratio of thesample is....
The following figure show the relationship between the voids ratio and effective stress for a soil sample collected from the mid depth of a 6 m thick clay layer. The Cc and Cr values have been determined to be 0.3 and 0.04 respectively. For the given information: If the current effective stress at the mid depth is 70 kPa, calculate the ultimate consolidation settlement when the effective stress at mid depth increases by 10 kPa due to an applied load. If the coefficient of consolidation is 0.555 m2/s and the clay layer is single drained, calculate the time taken to reach 45% consolidation.
Please solve fully and please make sure the answer to the second part is in time units of years. Thank you
Compare the final settlement magnitude of the soil samples in the two scenarios explained below between time t1 and time t2. Note: The answer must include a short explanation of the reason too. 1) The soil sample is compacted and subjected to one-dimensional consolidation loading under 200 kPa. After completion of the consolidation stage, it is unloaded and consolidated to 10 kPa (time=ti). Afterwards, the axial stress on the soil is increased to 200 kPa (time=t2). 2) The soil sample is consolidated under 10 kPa (time=ti), 50 kPa, 100 kPa and finally 200 kPa (time=t2).
Not interested in the calculations, just want to see the graph so please display that for me instead of the e calculations. Note) For soil sample in Table 2, initial thickness of sample = 14.31 mm, sample area = 2827.433 mm^2 , dry weight measured at the end of test = 52.53 g, specific gravity = 2.7. (Please draw graph possible) Also Determine the compression index and expansion index using graph