Answered: Why doesn't effective stress change…

Why doesn't effective stress change when the elevation of surface water is adjusted? What would happen to effective stress if the elevation of groundwater increased and decreased? Explain thoroughly.

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter11: Compressibility Of Soil

Section: Chapter Questions

Problem 11.15P

See similar textbooks

Related questions

Q: 16N, 6 = 7. For a vertical retaining wall 5 m high with level backfill and the properties y = 32°, &…

A: Note : Since you have asked multiple questions, we will solve the first question for you. If you…

Q: A pipe line consists of successive pipes with different sections: 380-mm, 300-mm, and 250-mm pipe.…

A: This question is related to the Fluid Mechanics.

Q: 30KN/m wt1m B 1m 4m

Q: 26 27 Exercise 28 F 29 30 31 E 32 P 133 34 5 店 35

Q: A clay fill has a bulk density of1.9 g/ee. If the moisture content is 17.89 find the dry density

Q: 4.34. A lined rectangular concrete drainage channel is 10.0 m wide and carries a flow of 8 m³/s. In…

A: Drainage channel : To reduce the number of individual drainage points, a channel is built into the…

Q: So k 40 kN/m lo lkNn 20 kNn In + 2mtant 3.

A: Provided problem with diagram , is solved. As per the asked details.

Q: 2. Calculate: supports reactions 30 kN 20 kN -10 kN/m A B |C |D - 2 m - 2 m .4 m NOTE: No hinge is…

Q: Compute the natural frequency in side sway for the frame is figure below. If the initial…

A: Initial Displacement : From the point trajectory's initial position to its final position, it…

Q: What is the moment of inertia of a circular beam with a diameter of 527mm.? Choose the nearest…

Q: 1. DRaw the shean and moment diagnom 20 kN/m 2.6.5 0 A 4m R.

Q: A transit with a stadia interval factor of 100.12 was set at C on the line between points A and B,…

Q: HW:B Find the mux Value of P) that can be aPPlied on the Cantilever beam Shown in figure r knowing…

Q: What is the Maximum moment in kN-m. Given: W = 30, a 2, b 8, and P 70 PkN a m W EN m b m Ry R2

A: To find out the maximum moment in KN-m.

Q: Determine the reaction at the roller support B of the beam shown 50 kN B 6 m 6 m actual beam

Q: A rectangular beam has a width of 335 mm and an effective depth of 620 mm. The specified compressive…

A: Given, b = 335 mm d = 620 mm f'c = 24 MPa f'y = 345 MPa

Q: What are the most common types of masonry units? List the functions of mortar. What are the…

A: This type of work is used in most type of structures. It is having so much advantages than the other…

Q: Percent finer by weight 20 c) Classify the soil using Unified Soil Classification System as shown…

Q: For the given reinforced T-section shown in Figure 2 with fc’= 30 MPa, fy = 400 MPa, calculate the…

A: According to the specifications, first we will calculate the compression and tension type of force.…

Q: 1.) A house is being built on the soil profile shown below bears at the depth shown. The surface…

A: q = 1500psf ko = 0.35

Q: Design for a tension member based on the following conditions below: • Tension member: single…

A: Answer Based on the given loading we need to find required gross section area of tension member.…

Q: What is the moment of inertia of a rectangular beam with a height of 425mm. and a base of 218mm.?…

Q: 4. A force Q is applied to a rectangular member with a size of 3oomm x 450mm. Q is located 37.5mm…

A: Applying Bending stress and Direct stress concept Q load is applied with ecentricity on both axis…

Q: The length of the spiral curve is 260 ft with a degree of the central curve equal to 4°. Use g=…

A: Given Length of spiral curve= 260 ft Degree of curve= 4°

Q: Engineering Mechanics The blocks shown in Fig. P-522 are separated by a solid strut which is…

A: To Determine The value of horizontal force P to cause motion to impend to the right.

Q: Cement Test Results: Tests Weight of w/c ratio Water weight Results Cement Consistency Test350gr 0.3…

A: given-

Q: A prestressed beam has a width of 300 mm and depth of 600 mm. It is subjected to a bonded prestress…

A: Given Data: The width of the prestressed beam is b=300 mm. The depth of a prestressed beam is d=600…

Q: A transit with a stadia interval factor of 100.12 was set at C on the line between points A and B,…

Q: A reservoir has an average area of 50 km over an year. The normal annual rainfall at the place is…

A: Area of reservoir catchment, A=50Km2The normal annual rainfall, P=120cmClass A pan evaporation…

Q: centroid g wl rupect to x-axis 8" 6"

A: Determine centroid Y-bar with respect to X-axis,

Q: The upstream pressure on a rock sample is 0.113MPa and the downstream pressure is 0.1MPa. Under this…

A: Darcy's law : Darcy's law is a mathematical formula that defines how fluid flows through a porous…

Q: Calculate discharge for a rectangular Sarda fall having Crest length 10 m Top width 3m and Depth of…

Q: In the two-peg of a dummy level, the following observation are taken. INSTRUMENT SET UP NEAR…

Q: A 4.50m high noise barrier results in a Path Length Difference of 1.4855m. Calculate the Fresnel…

A: Given:- The height of the noise barrier = 4.50 m The path length difference = 1.4855 m The…

Q: rch Alt+Q) Heber John de Vera HI Review View Help ACROBAT O Record B Share so kN 40 kN/m lo kNm 20…

Q: Rib m. Q-6: Water flows in a confined aquifer from a fully penetrating river with a piezometric head…

Q: MA = 12 kN. m w = 3 kN/m А В 6 m

Q: 120 kN 60 kN 120 kN 120 kN 3 m 3 m 6 m - 3 m B 2 m 4 m Figure P-427

Q: DETERMI NE CENTROID ū W/ RESPECT to X-AXS. centrond gw rupect to x-axis

A: Determine centroid y with respect to X axis

Q: 4. (Problem 6.42 from the text book) Knowing that a given vertical shear V causes a maximum shearing…

A: Shear stress Shear stress is a force that tends to produce material deformation by sliding along a…

Q: 10KN 5kN/m C 5.0m A AB

Q: easure the velocity of air at the center of a duct aving a 10 cm diameter. A tube mounted at the…

A: Data given Diameter of the Duct =D = 2m Temperature in the duct T = 20°cspecific gravity s = 0.7

Q: 2. Determine the force in bars BD, CD, and DE of the nacelle truss shown in Fig. 60 kN 120 kN 3 m…

Q: REE - Apr. 2001 18. Determine the divergence of the vector: V= i(x) + j(-xy) + k(xyz) at the point…

A: Given data: Vector: V=iX2+j-XY+kXYZ at (3, 2, 1)

Q: 1. REACTION AT A 2. Force at member FEB 3. Compute the force in member FEF 4.Compute the force…

Q: From your knowledge and experience, what can you conclude about the Determination of Normal…

A: Determination of normal consistency of hydraulic cement is for the purpose to check at which optimum…

Q: A prismatic bar ABC is subjected to an axial load of 25 kN; the reactions R, and R. will be + 25 kN…

Q: today at 8:12 pm mee A metallic cube 30 cm side and weighing 450 N is lowered into a tank containing…

Q: 1 A six-meter high stand-alone column, with fixed support at the bottom and pinned support at the…

A: ASTM A992 steel rolled into W21x57 section is used to create a six-meter high stand-alone column…

Q: The section shown carries a total service tension load of 508 kN with a dead to live load ratio of…

A: Given Section C15 x 40

Concept explainers

Principles of Seepage

In hydrology, when water flows down in a pore or crack of unsaturated soil due to gravity, the deep layer of soil is called seepage. It is the slow movement of water in the soil layer. Seepage is mainly found near hydraulic structures and is responsible for the stability of earthen-type hydraulic structures.

Question

Why doesn't effective stress change when the elevation of surface water is adjusted? What would happen to effective stress if the elevation of groundwater increased and decreased? Explain thoroughly.

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

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

Initiate Research on Effective Stress, Total Stress and Pore Water Pressure. Answer the following: 3. What is Pore Water Pressure? 4. What is Capillary and the Capillary Effects in Soils?
Solve the following problems. Provide complete solutions and summary of answers. The water table in a 5-meter soil profile is located 1 meter below the ground. The soil above the water is also saturated due to capillary action. The saturated unit weight of the soil per cubic meter is 20.15 KN. What is the total effective stress acting at point A, which is 0.70 meter above the lowest point?
i. A sandstone core sample is saturated 100% with water. Calculate the absolute permeability of the core sample if the water is flowing at 6.21 cubic centimetres per second. The length of the core sample is 14 centimetres and its diameters is 6 centimetres. The pressure differential across the core sample is 15 atmospheric pressure and the water viscosity is 1.2 centipoises. Explain a method of how the permeability of low permeability reservoirs can be ii. improved.
Figure B: Stress diagram Total Stress (6) Pore Water Pressure (u) Effective Stress (o') 26.2 kPa 26.2 kPa -2.0 m \71.2 kPa 25 kPa i) ?? kPa -4.5 m Vii) ?? kPa 70 kPa 90.3 kPa -9.0 m Figure B Stress diagram Now, assume groundwater table is far, referring to the Figure B, calculate the dry unit weight for 2nd layer (depth below existing ground surface from 2 m till 4.5 m). Assume the specific gravity is 2.65 and unit weight of water is 10 kN/m3. Answer in kPa with two decimal place only. (Please write down value only. Don't input unit in the answer) Your answer
(a) What is the pore water pressure at point A (kPa), and what is the effective stress at point A (kPa) ? (b) True or False: The effective strength at point A will increase if the groundwater table rises to the ground surface.
Solve the following problems. Provide complete solutions and summary of answers. The water table in soil deposit is 2 meters below the ground surface. The soil above the water table has a dry unit weight of 14.85 kN/cu. Meter. The saturated unit weight of the soil is 20.58 kN/cu.meter. Determine the following: a. Total Stress at a point 4.80 meters below the ground b. Total Pore pressure 4.80 meters below the ground c. Total effective stress at a point 4.80 meters below the ground.
i. Describe how changes in the mean normal stress affect the sign and magnitude of the excess pore water pressure in a soil. ii. Which would probably provide better support for a large, heavy building, a diorite or a shale? Why?
Calculate the value of the effetive stress at the bottom of the given soil.
A concrete culvert is to be constructed in a bed of sand (e = 0.65) for drainage purposes. The crown of the culvert will be located 3.5 m below ground surface. Currently, the groundwater level is at ground surface. But, after installation of the culvert, the groundwater level is expected to drop to 2 m below ground surface. Calculate the change in effective stress on the roof of the culvert after installation. You can assume the sand above the groundwater level is saturated.
Calculate the variations of o, u, and o' at points A, B, and C, and how high should the groundwater table rise so that the effective stress at C is 111 kPa? A Dry sand e=0,61 G = 2.66 4 m - B Saturated sand. 5 m e = 0,48 G=2.67 Clay © Cengage Learning 2014
Problem # 3. The figure show a granular soil in the tank having downgrade seepage. The water level in the tank is held constant by adjusting the supply from the top and outflow at the bottom. a. Determine the total stress at the bottom.b. Find the pore or water pressure at the bottom.c. Compute the effective stress at the bottom.
Define the Determination of preconsolidation pressure ?