er (with top and bottom drainage) is projected to have 10 inches of consolidation settlement. There has currently been 3 inches of settlement over a 35 day period. What is the vertical coefficient of consolidation value for this clay layer? What is the estimated time to reach 98% consolidation?

er (with top and bottom drainage) is projected to have 10 inches of consolidation settlement. There has currently been 3 inches of settlement over a 35 day period. What is the vertical coefficient of consolidation value for this clay layer? What is the estimated time to reach 98% consolidation?

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter9: Consolidation

Section: Chapter Questions

Problem 9.17P

See similar textbooks

Related questions

Q: What is consolidation? Explain the concept of NCR and OCR with examples in your own words.

A: Since, the question to be solved is not stated, the solution for question 2a is as follows:…

Q: A 3m deep sand layer has a specific gravity of 2.68 and a void ratio of 0.60. Under this layer is a…

A: step 1-

Q: A 3 m thick clay layer (single-drained) under surcharge loading underwent 60% primary consolidation…

A: Terzaghi theory is applicable

Q: A clay layer with a sand layer on the top and a rock layer (impermeable layer) on the bottom. When a…

Q: What is the typical saturated permeability values for sand, silt and

A: Given data- typical saturated permeability values for sand, silt and clay

Q: A saturated clay stratum draining both at the top and bottom undergoes 50% consolidation in 16 years…

Q: Problem 3: For a sandstone reservoir, calculate the water saturation if the porosity (Ø) is (20 %),…

Q: Calculate the degree of consolidation of a 6 m thick double drained clay layer after 4862 days since…

Q: A certain clay layer has a thickness of 2 m. After one year when the clay layer was 50% consolidated…

A: Solution Given Data Thickness= 2 m After one-year clay layer consolidation is= 50% Settlement after…

Q: A clay layer has consolidated in 5 years. The secondary compression in the next 7 years is 40 mm.…

A: Given, tp = 5 years ∆t = 7 years

Q: The time required for 50% consolidation of a 25 mm thick layer (drained at both top and bottom) in…

A: Given data Percentage of consolidation Thickness of laboratory soil sample 2 way drainage Time to…

Q: A 20 mm thick laboratory soil sample reaches 60% consolidation in 32.5 seconds under double drainage…

A: Given- thickness of soil sample H=20 mmConsolidation U=60% time t=32.5 sDouble drainage conditionIt…

Q: From the application of given pressure, the anticipated primary consolidation settlement is 0.064…

Q: A layer of soft clay 4 m thick under construction building, the overburden pressure over the center…

Q: 4. A soil strata can be described as 6 meters of sand underlain by 4 meters of clay with the water…

A: Effective stress at middle of clay is given by ; σ1 = 14 *3 + (18 - 9.81) * 3 + (19 - 9.81) * 2 =…

Q: 1.Laboratory tests on a 25mm thick clay specimen drained at both the top and bottom show that 50%…

A: As per Bartleby policy i can answer only one question at a time. Please upload other questions…

Q: : A clay specimen was tested in a laboratory consolidation device, which was 12.7 mm thick and the…

A: The compressibility of the soil is defined as the ability of the soil to compress or settle. The…

Q: A stratum of normally consolidated clay of thickness 10 ft is drained on one side only. It has a…

Q: In an oedometer test, a specimen of saturated clay 19 mm thick reaches 50% consolidation in 20…

Q: A 10 m clay layer is sandwiched between two sand layers and subjected to a uniformly distributed…

Q: Question attached

A: Secondary consolidation: The reduction in volume continues at a very slow rate even after the excess…

Q: A buried clay layer ten feet thick is sandwiched between strata free draining granular soil so that…

Q: a. How long will it take for 50% settlement to occur? Cv = 0.002 cm2 /sec. b. How long will it…

A: Given: consolidated clay layer = 3m = 300cm settlement = 80 mm Cv = 0.002 cm2

Q: A normally consolidated clay layer is 4 m thick (one-way drainage). From the application of a given…

Q: Problem 10: A 3-m thick, doubly-drained saturated stratum of clay is under a surcharge loading that…

A: The thickness of clay layer = 3m Time for consolidation = 75 days = 75*24*60*60 =6480000 Percentage…

Q: A soil strata can be described as 6 meters of sand underlain by 4 meters of clay with the water…

A: Given data- For sand-γd=14 kN/m3γsat=18 kN/m3For clay-γsat=19 kN/m3Void ratio e=0.8Liquid limit…

Q: A clay layer 10m thick that drains at the top only settled 9cm in 3.5 yrs. Given cv = 0.544x10-2…

A: Consolidation is the process of removal of water from the soil by applying pressure on the soil.…

Q: A sand is densified by compaction at a site so that the void ratio changes from 0.80to2.70. what is…

A: Given data: Specific gravity of soil (G) =2.7 Initial void ratio of the soil (ei) = 0.8 Void ratio…

Q: An odometer test is carried out on a sample of clay 20 mm thick assumed to be fully saturated. The…

Q: A 10 ft thick clay layer of saturated clay (two-way drainage) under a loading underwent 90% primary…

Q: Compressibililty: Consolidation and Settlement of Soil 500 kN 4m x 3m 3.5m Dry Sand Yary = 15 kN/m…

Q: Q1- In an Odometer test a specimen of saturated clay 26 mm thick reaches58% consolidation in 31 min.…

Q: 1.In an oedometer test a specimen of saturated clay 19 mm thick reaches 50% consolidation in 20 min.…

Q: A buried clay layer 10 ft thick is sandwiched between strata of free-draining granular soil so that…

A: The expression for settlement time is given as, Here, t is the time at which settlement is…

Q: A 10 m thick clay layer with single drainage layer undergoes a settlement of 22 mm in 3 years. If…

A: Ans is 10 years

Q: 4. A 3.2 m thick layer of saturated clay undera surcharge loading underwent 90% primary…

A: Given data in question Thickness of layer 2 way drainage = d =H/2 90% consolidation Time taken To…

Q: How long will it take (in days) for a 3-foot clay layer in the field (double drained) to reach 60%…

A: Given Data Thickness of layer H= 3 foot For (Double drainage) Thickness of layer Hdr= H/2= 1.5 foot…

Q: Q: For the soil profile shown in figure. Determine the: a) Final consolidation settlement. b) Time…

A: consolidation is the process of settlement of soil layer due to expulsion of pore water pressure.…

Q: A certain clay layer has thickness of 5 m. After 1 year, when the clay was 50% consolidated, 8 cm of…

Q: The time to reach 60% consolidation is 35 seconds for a sample of 15 m thick tested in a laboratory…

A: Given data :- 1st case :- Degree of consolidation (u) = 60% = 0.6 Time (T1) = 35 second…

Q: Laboratory test on a 35 mm thick clay specimen drained just at the top show that 60% consolidation…

Q: A soil profile shown is subjected to a load of 48 kN/m? at the ground surface. The preconsolidation…

A: Assume LL=48 and e=1.0so,CC=0.007LL-7=0.287Find effective stress at middle of clay…

Q: In a reclamation project, the middle of a clay layer is under an initial effective vertical stress…

Q: A soil profile is shown in Figure 1. Determine the total consolidation settlement of the clay layer…

A: ∆σ = 15KPa

Q: Two clay specimens A and B, of thickness 2cm and 3cm, have equilibrium voids rations 0.68 and 0.72…

A: Given: For Clay specimens A : initial void ratio, eo = 0.68 final void ratio, e = 0.50 So,…

Q: A 3 m thick stratum (drained in two directions) of saturated Clay and under overburden, exhibited…

A: Given Data: Saturated Clay of thickness (H) = 3 m Both way drainage Primary Consolidation (U) = 90%…

Q: What is the average degree of consolidation for the clay layer when the settlement is 85mm? b. How…

A: Given-A given surcharge, a 5.1 m thick layer has consolidation settlement of 306 mm. Required- to…

Q: Estimate the primary consolidation settlement in the clay layer. Given: Δσ = 150 kN/m2; H1 = 3 m;…

A: CC=0.009LL-10CC=0.00965-10=0.495CS=16CC=0.0825Effective stress at middle of…

Q: soil strata can be described as 6 meters of sand underlain by 4 meters of clay with the water table…

A: Given:- sand depth = 6 meters clay depth = 4 meters dry unit weight of sand = 14kN/m3 saturated unit…

Q: A 8 m thick clay layer with single drainage settles by 120 mm in 2 years. The coefficient of…

A: This question is related to the Consolidation from Geotechnical Engineering.

Concept explainers

Calculation of Settlement

The vertical displacement of the structural foundation due to the loading from the superstructure is known as settlement. It is due to the reduction of air voids present in the soil. The amount of vertical displacement depends on the bearing capacity of the soil on which the foundation is laid. The effect of the settlement depends on the magnitude of settlement, uniformity, and the structural design of the structure. The maximum allowable settlement for residential and office buildings should be less than 18 mm, for industrial buildings, it is 38 mm and for commercial buildings, it is 25 mm.

Question

A 10 ft thick clay layer (with top and bottom drainage) is projected to have 10 inches of consolidation settlement. There has currently been 3 inches of settlement over a 35 day period. What is the vertical coefficient of
consolidation value for this clay layer? What is the estimated time to reach 98% consolidation?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1 Solution:-

Step 2 Solution:-

Step 3 Solution:-

Step 4 Solution:-

Step by step

Solved in 4 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

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?
4. (a) Time required for a 3m clay layer, sitting on bedrock, and overlain by a sand layer to fully consolidate is 4 years. What if the clay layer was on a sand layer or another stiff clay layer? Please explain (with reasoning) how the time required for the consolidation process to complete is likely to be affected in either case (no calculations required to be shown).
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?
A 6 foot thick clay layer is determined to have the consolidation properties shown below. If the average in-situ stress is 500 psf and the preconsolidation stress is 1,000 psf, what is the settlement for this overconsolidated soil subjected to a stress increase of 2,000 psf.
In an oedometer test, a specimen of saturated clay 19 mm thick reaches 50% consolidation in 20 minutes. How long it would take a layer of this clay 5m thick to reach the same degree of consolidation under the same stress and drainage conditions? How long would it take for the clay layer to reach 30% consolidation?
Q1- In an Odometer test a specimen of saturated clay 26 mm thick reaches 58% 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?
Laboratory test on a 35 mm thick clay specimen drained just at the top show that 60% consolidation takes place 9.5 minutes. a) How long will it take for a similar clay layer in the field, 3,6 m thick, but drained at both the top and bottom, to undergo 60% consolidation? b) Find the time required for the clay layer in the field as described in part (a) above to reach 70% consolidation,
Laboratory tests on a 25mm thick clay specimen drained at both the top and bottom show that 50% consolidation takes place in 8.5 minutes. Find the time required for the clay layer in the field as described in How long will it take for a similar clay layer in the field, 3.2 m thick, but drained at the top and bottom, to undergo 50% consolidation, to reach a 65% consolidation.
For a certain loading condition, a saturated clay layer undergoes 40% consolidation in a period of 160 days. What would be additional time required for further 10% consolidation to occur?
The data in Table 1 shows the results from a consolidation test conducted on a specimen of clay. Table 1. Results from the consolidation test o'(kPa) e 50 100 200 400 800 400 200 100 200 400 800 1600 1.63 1.6 1.55 1.39 1.22 1.24 1.28 1.33 1.31 1.28 1.21 1.07 Draw the e-log o' graph. • Determine the compression index (Cr). a)Determine the recompression index (Cr).
A laboratory sample of clay 2 cm thick took 15 min to attain 60 percent consolidation under a double drainage condition. a. What time will be required to attain the same degree of consolidation for a clay layer 3 m thick under the foundation of a building for a similar loading and drainage condition? b. How long (in days) will it take in the field for 30% primary consolidation to occur?
Laboratory tests on a 25-mm-thick clay specimen drained at the top and bot-tom show that 50% consolidation takes place in 8.5 min.a. How long will it take for a similar clay layer in the field, 3.2 m thick anddrained at the top only, to undergo 50% consolidation?b. Find the time required for the clay layer in the field described in part (a)to reach 65% consolidation.