4) In the borehole B-11, a buried clay layer of 30 feet thick is sandwiched between strata of free- draining granular soil so that double drainage during consolidation can occur. Calculations indicate that, due to a planned building loading, an ultimate settlement of 2 in. is expected as a result of consolidation of the clay layer. The coefficient of consolidation for the clay is 0.01 ft2/day. a) How long will it take 90 percent of the estimated settlement to take place? b) How much settlement will occur in one year? c) How long will it take for one inch of the settlement to take place?

4) In the borehole B-11, a buried clay layer of 30 feet thick is sandwiched between strata of free- draining granular soil so that double drainage during consolidation can occur. Calculations indicate that, due to a planned building loading, an ultimate settlement of 2 in. is expected as a result of consolidation of the clay layer. The coefficient of consolidation for the clay is 0.01 ft2/day. a) How long will it take 90 percent of the estimated settlement to take place? b) How much settlement will occur in one year? c) How long will it take for one inch of the settlement to take place?

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

Similar questions

A buried clay layer 10 ft thick is sandwiched between strata of free-draining granular soil so that double drainage during consolidation can occur. Calculations indicate that, because of a planned building loading, an ultimate settlement of 2 in. is expected as a result of primary compression in the clay layer. The coefficient of consolidation for the clay is 0.01 ft2/day. (a) How long will it take for 90 percent of the estimated settlement to take place?(b) How much settlement will occur in one year?(c) How long will it take for 1 in. of settlement to take place?
a. Calculate the degree of consolidation of a 6 m thick double drained clay layer after 4862 days since initial loading. The coefficient of consolidation is 1.06 X 10-6 m2/min. b. For the same clay layer, how much time would it take to reach 30% consolidation, if drainage existed on only one boundary?
A buried clay layer ten feet thick is sandwiched between strata free draining granular soil so that double drainage during consolidation can occur calculations indicate that due to a planned building loading, an ultimate settlement of 2 inches is expected as a result of compression in the clay layer. The coefficient of consolidation for the clay layer is 0.01 ft.2/day.a) How long will it take for 90 % of the estimated settlement to take place ? b) How much settlement, H, will occur in one year %?c) How long will it take for an inch of settlement to take place ?
Q 8.7 If the coefficient of consolidation for the clay layer in problem 8.3 is 0.0018 cm^2/Sec, how long will it take for 60% primary consolidation to take place? What will be the total compression due to consolidation at that time?
A 3-m-thick layer (two-way drainage) of saturated clay under a surchargeloading underwent 90% primary consolidation in 75 days. Find the coefficientof consolidation of clay for the pressure range.
Under a given surcharge, a 5.1 m thick layer has consolidation settlement of 306 mm. Assume Cv=0.003 sqcm/sec. a. What is the average degree of consolidation for the clay layer when the settlement is 85mm? b. How long will it take for 60% consolidation to occur if the layer is drained at the top only? c. How long will it take for 60% consolidation to occur if the layer is drained on both ends? Please answer this asap. For upvote. Thank you very much
A singly drained clay deposit 10 meters thick has a coefficient of consolidation of 2.0 x 10-4 cm2 / s. A settlement analysis based on consolidation tests predicted an ultimate consolidation settlement under the applied load in the field to be 0.95 meters. a) How long would it take, in years, for a settlement of 35 cm to occur? b) How much settlement, in millimeters, would you expect to occur in 5 years?
A 10 m clay layer is sandwiched between two sand layers and subjected to a uniformly distributed load of 100 kPa. If the coefficient of consolidation is 0.005 cm2 /s. length of the drainage path is 5m. What will be the time required for 50% consolidation?
A 3-m layer (double drainage) of saturated clay under a surcharge loading underwent 90% primary consolidation in 75 days. Find the coefficient of consolidation of clay for the pressure range..
A clay layer with a sand layer on the top and a rock layer (impermeable layer) on the bottom. When a surcharge is applied, the clay layer will undergo a total 25 cm primary consolidation settlement. If 20 cm of the total consolidation settlement is achieved in 10 years, please find: Coefficient of consolidation, Cv (m2/year) If the rock layer is replaced by a sand layer, how long will it take to finish 10 cm of the total consolidation settlement (year)? If the coefficient of the volume compressibility (mv) is 0.001 m2/kN, what is the hydraulic conductivity of the clay (cm/s)?
In the soil profile shown below, if the water table changes from level WT0 to level WT1 permanently, what is the change in the ground surface elevation in mm in the long term after primary consolidation is completed? Assume that the clay layer is initially normally consolidated. Use a single clay layer in your calculations and positive value for settlement. (Acceptable tolerance = 4%)
A 3-m thick layer of saturated clay (two-way drainage) under a surcharge loadingunderwent 90% primary consolidation in 100 days. The laboratory test’s specimenwill have two-way drainage.a. Find the coefficient of consolidation of clay for the pressure range. b. For a 25 mm. thick undisturbed clay specimen, how long will it take to under-go 80% consolidation in the laboratory for a similar pressure range?