A 5 m thick clay layer lies between two layers of sand each 4 m thick, the top of the upper layer of sand being at ground level. The water table is 2 m below the ground level but the lower layer of sand is under artesian pressure, the piezometric surface being 4m above ground level. The 27 saturated unit weight of clay is 20 kN/m³ and that of sand is 19 kN/m³. Above the water table unit weight of sand is 16.5 kN/m³. Calculate the effective vertical stresses at the top and bottom of the clay layer. Also draw the total vertical stress diagram in the given soil layers.

A 5 m thick clay layer lies between two layers of sand each 4 m thick, the top of the upper layer of sand being at ground level. The water table is 2 m below the ground level but the lower layer of sand is under artesian pressure, the piezometric surface being 4m above ground level. The 27 saturated unit weight of clay is 20 kN/m³ and that of sand is 19 kN/m³. Above the water table unit weight of sand is 16.5 kN/m³. Calculate the effective vertical stresses at the top and bottom of the clay layer. Also draw the total vertical stress diagram in the given soil layers.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: A silty sand fill 4.5 meters thick and an estimated density of 20 kN/m³ is to be placed over 4.0 m…

A: eo = 1.255Cc = 0.29Cr = 0.035Cv = 0.79 m2/yrNOTE : As per guidelines, first 3 parts are solved.…

Q: Question A 588 cm³ volume of moist sand weighs 1010 gm. Its dry weight is 918 gm and specific…

A: Given- Volume of moist sand- V=588 cm3,Weight w=1010 gm,dry weight=918 gm,G=2.67,ρw=1 gm/cm3, It is…

Q: Question (3) (30 pts) A soil profile beneath a lake consists of 8 m thick sand layer underlain by a…

A: See explanation Explanation:Step 1:Step 2:Step 3: Step 4:

Q: The profile at a site consists of 5m of sand overlying 10m of compressible clay, which in turn…

A: The excess pore water pressure is developed in the clay layer by immediately placing the surcharge…

Q: The representative liquid limit and plastic limit values of a saturated consolidate clay deposit are…

A: Given- Liquid limit LL=60%, Plastic limit PL=30%, Saturated unit weight- γsat=19 kN/m3, Water table…

Q: I H₂ = 5m e = 0.4 G₂ = 2.68 Details of Soil Layer H₂ = 4m e = 0.6 G₂ = 2.73 III H₂ = 3m 8 =…

Q: A cubic meter of dry (no water) quartz sand (G, = 2.65) with a porosity of 60% is immersed in an oil…

A: Vt = 1 m3Gs = 2.65n = 60% or 0.60 = 0.92 g/cm3 or 920 kg/m3 Vair = 0.27 m3

Q: 9. A cubic meter of a saturated, normally consolidated clay has a dry mass of 4 kg and a porosity of…

A: Since we know that Void ratio (e) = Porosity1- porosity = n1-n Here porosity (n) =…

Q: A clay layer 12ft thick rests beneath a deposit of submerged sand 26ft thick. The top of the sand…

A: Given Depth of sand layer= 26 ft Depth of clay layer = 12 ft Depth of water = 10 ft Saturated…

Q: A layer of saturated clay with 4 m thick is overlain by sand with thickness of 5 m deep, the water…

A: Fluid mechanics alludes to an expansive designing field that concentrates on the major conduct of…

Q: A river has a depth of 9m, 12m, and 7m during the months of February, March, and April,…

A: River depth in different months have been given and river bed arrangement as shown in the diagram…

Q: Q3. A soil in its natural state is partially saturated having a water content of 17.5% and a void…

Q: A container of volume 3 x 103 m³ weighs 10 N. Dry sand was poured to fill the container. The…

Q: During a consolidation test, a sample of fully saturated clay 3 cm thick (= ho) is consolidated…

Q: The void ratio of a 4 m thick consolidated clay is 1.3. The compression index and coefficient of…

A: Given: Thickness of layer, Ho = 4 m Void ratio, e = 1.3 Compression index, CC = 0.6 Coefficient of…

Q: The profile at a site consists of 5 m of sand overlying 10 m of compressible clay, which in turn…

A: The excess pore water pressure developed immediately after placing the stress of 200 kPa is…

Q: /

Q: 16 The degree of saturation of a soil is 55% and the moist unit weight is 16.66 kN/m When the moist…

A: To find void ratio(e) and specific gravity (Gs)

Q: A bed of sand consists of three horizontal layers of equal thickness. The value of k for the upper…

Q: The void ratio of a 4 m thick consolidated clay is 1.3. The compression index and coefficient of…

A: Given: Thickness of layer, Ho = 4 m Void ratio, e = 1.3 Compression index, CC = 0.6 Coefficient of…

Q: he ground water level in a thick very fine sand deposit is located 1.20 meters below the ground…

A: Given data: unit weight of the saturated sand is 21.7 kN/m3 . Depth of Ground water level = 1.2 m…

Q: The porosity of the soil will be 1 1N. 13

A: SOIL MECHANICS:

Q: A clay layer of thickness 10 cm and initial void ratio 0.5 undergoes settlement so that the final…

A: Clay layer thickness H=10 cm, Initial void ratio e=0.5, Final void ratio e2=0.2, Thickness of the…

Q: The relationship between the specific gravity of sand (G) and the hydraulic gradient (i) to initiate…

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 5 m thick clay layer lies between two layers of
sand each 4 m thick, the top of the upper layer
of sand being at ground level. The water table is
2 m below the ground level but the lower layer of
sand is under artesian pressure, the piezometric
surface being 4m above ground level. The
27
saturated unit weight of clay is 20 kN/m³ and that
of sand is 19 kN/m³. Above the water table unit
weight of sand is 16.5 kN/m³. Calculate the
effective vertical stresses at the top and bottom
of the clay layer. Also draw the total vertical stress
diagram in the given soil layers.

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: Given

VIEW

Step 2: Diagram of situation and total stress diagram

VIEW

Step 3: Calculation of total stress

VIEW

Step 4: Calculation of pore water pressure

VIEW

Step 5: Calculation of effective stresses

VIEW

Solution

VIEW

Step by step

Solved in 6 steps with 7 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

A clay layer having a thickness of 12.51 m. has an initial void ratio of 1.39. It is compressed and the void ratio changed to 0.87. Determine the reduction in thickness, in mm., of the clay layer.
Question 7 During the glacial period, the in situ stress of a clay formation was approximately 20,000 psf. Today, the in situ stress of that same clay is approximately 9500 psf. Which of the values below are most likely the OCR of the clay? O 1.65 O2.10 O 0.50 1.00
GL Sand Water table is at ground level Water content = 20% Specific gravity of solids 2.7 Unit weight of water = 10 kN/m 5 m %3D %3D %3D The saturated unit weight of the sand (kN/m3) is
A 5.3 m thick of soil consist of three different layers as follows: Layer 1: H = 1.6 m, k = 4.5 m/day Layer 2: H = 2.3 m, k = 3.5 m/day Layer 3: H = 1.4 m, k = 3.1 m/day 1 What is the equivalent coefficient of permeability in the horizontal direction? Nhat is the equivalent coefficient of permeability in the vertical direction? Nhat is the total flow (horizontal flow) q in m³/day, if i = 0.005 and assume 1-m width? QIFIC
A huge marble boulder on a quarry site sits on the ground. This marble is 10 m by 10 m and has a height of 16 m. The boulder is situated on a 6 m thick soil with e = 0.70, S = 65%, and G, = 2.68, then by a 5 m thick clay with e = 0.80, G, = 2.71 and LL = 48. The water table exists in between the sand-clay interface. The specific gravity of the marble is 2.60. Assuming that the clay is normally consolidated... Q: What is the primary consolidation settlement of the clay layer in mm using approximate method? Round off your answer to the nearest whole number.
The water content and the total density in a partially saturated sand ( G= 2.64) layer are w=20% and p=1.8 g/cm3 , respectively. If the maximum and minimum values of the void ratio are 0.92 and 0.62, respectively determine the relative density Dr of the sand in this layer.
if sand has angle of angle of internal friction 32 degree. Determine coefficient of active earth pressure
Question Assuming that a river bed level does not change and the depth of water in river was 10m, 15m and 8m during the months of February, July and December respectively of a particular year. The average bulk density of the soil is 20kN/mJ³. The density of water is 10kN/m³. The effective stress at a depth of 10m below the river bed during these months would be
Q2: Available field data indicate that the permeahility for the clay is varies with depth. For layer 1: ku = 3.2 x 10 cmis; k = 1.1 x 10 cmis. For layer 2: kg - 1.7 x 10 em's; ka - 3.4 x 10" cm/s. For layer 3: kg - 1.4 x 10 cmis; ka - 44 x 10* cm/s. Compute the equivalent permeability for flow parullel and perpendicular to the clay layers shuwn in Fig.2. Layr 1 L 2 Layer a Fig.2 180 m
The void ratio of 4 m thick consolidated clay is 1.3. The compression index and coefficient of consolidation of the clay is 0.6 and 1m2/year respectively. It is observed that the increase in vertical pressure is equal to the effective overburden pressure. Determine the change in the thickness of the clay layer (in mm).
At the end of the consolidation of clayey soil, excess pore water pressure is equal to .