Due to clogging of the drainage system, the water table has built up to a depth of 4m below the ground surface behind the retaining wall shown in Figure 2. The soil above the water table is partially saturated and has a unit weight of 17 kN/m3. Below the water table, the soil is saturated and has a unit weight of 19 kN/m3. Calculate the total and effective vertical and horizontal stresses at point A under active conditions. 4 m Y= 17 kN/m3 GWT 2 m Ysat = 19 kN/m3 9= 33 Fig. 2

Due to clogging of the drainage system, the water table has built up to a depth of 4m below the ground surface behind the retaining wall shown in Figure 2. The soil above the water table is partially saturated and has a unit weight of 17 kN/m3. Below the water table, the soil is saturated and has a unit weight of 19 kN/m3. Calculate the total and effective vertical and horizontal stresses at point A under active conditions. 4 m Y= 17 kN/m3 GWT 2 m Ysat = 19 kN/m3 9= 33 Fig. 2

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter16: Lateral Earth Pressure

Section: Chapter Questions

Problem 16.2P

See similar textbooks

Similar questions

a retaining wall supports a horizontal backfill that is composed of two types of soil. first layer: 4.92 meters high, Unit weight of 16.29 kN/m^3, coefficient of active pressure of 0.296 second: 6.85 meters high, Unit weight of 18.31 kN/m^3, coefficient of active pressure of 0.302 determine the distance of the total active force measured from the bottom of the wall
A retaining wall supports a horizontal backfill that is composed of two types of soil First layer: 4.75 meters high, Unit weight of 16.35 kN/m^3, coefficient of active pressure of 0.295 Second layer: 5.38 meters high, Unit weight of 18.54 kN/m^3, coefficient of active pressure of 0.305 Determine the distance of the total active force measured from the bottom of the wall
A retaining wall 8 m high supports a cohesionless soil having a dry density of 1600 kg/m^3, angle of shearing resistance is 33 degrees and void ratio of 0.68. The surface of the soil is horizontal and level with top of the wall. Neglect wall friction and use Rankine’s formula for active pressure of a cohesionless soil. Determine the value of earth thrust on the wall per meter length if the soil is dry. a. 121 kN b. 186 kN c. 148 kN d. 137 kN determine the value of earth thrust on the wall if water level is 3.5 m below the surface. a. 230 kN b. 250 kN c. 180 kN d. 210 kN find the height above the base of the wall where the thrust acts during the water logged condition. a. 3.50 m b. 2.67 m c. 1.75 m d. 2.25 m
A retaining wall 8 m high supports cohesionless soil having a dry density of 1600 kg/m³, angle of resistance 33° and void ratio of 0.60. The surface of the soil is horizontal and level with the top of the wall. Neglecting wall friction and using Rankine’s formula for active pressure of a cohesionless soil. 1.Determine the nearest value of the total earth thrust on the wall in KN per lineal meter if the soil is dry. 2. Find the nearest value of the thrust on the wall in KN per lineal meter if owing to inadequate drainage, it is waterlogged to a level of 3.5 m below the surface? 3. Find at what height above the base of the wall the thrust acts during the waterlogged condition?
A retaining wall with vertical back is 8 m. high. The density of top 3 m. of fill is 1.75 Mg/m³ and the angle of internal friction is 30°. For the lower 5 m. the values are 1.85 Mg/m³ and 35° respectively. There is a surcharge load on the horizontal surface of the fill equivalent to 1.2 Mg/m² uniformly distributed. Solve for the following questions below: 1. Find the magnitude of the thrust on the wall per linear meter if the fill is well drained. 2. Find the magnitude of the thrust on the wall per linear meter if the fill is waterlogged after a storm (Assume the saturated quantities of the two strata are 1.9 and 2.0 Mg/m³ respectively.) 3. Find the point of application of 5 points the thrust on the wall if the fill is waterlogged after a storm.
A vertical wall is 8m high and it retains a fill material. The upper 2m of the fill has density of 2000kg/m^3, angle of friction is 20° and unit cohesion c=25Kpa on the horizontal surface of the fill. The lower layer of the fill is fully saturated and has a saturated density of 2100kg/m^3, angle of friction is 25° and unit cohesion c=20kpa. Calculate the thrust exerted on the retaining wall and the height of the resultant thrust above the base of retaining wall.
A retaining wall 7 m high supports a cohesionless soil having a dry density of 1600 kg/m3, the angle of shearing resistance is 33° and void ratio of 0.68. The surface of the soil is horizontal and level with the top of the wall. Neglect wall friction and use Rankine’s formula for active pressure of a cohesionless soil. Determine the nearest value of the total earth thrust on the wall in kN per lineal meter if the soil is dry. Determine the nearest value to the thrust on the wall in kN per lineal meter if owing to inadequate drainage, it is water logged to a level 3 m below the surface. Determine the nearest value to the height above the base of the wall where the thrust acts during the waterlogged condition.
SOLVE FOR THE LOCATION AND MAGNITUDE OF THE PASSIVE AND ACTIVE THRUST OF THE RETAINING WALL. Along the passive side, the soil has the following properties: unit weight: 16 kN/m3, cohesion = 30 KPa, angle of internal friction = 25 degrees. and along the active side: sand: unit weight = 15 KN/m3, angle of internal friction = 30 degrees, and for clay: dry unit weight = 16.5 KN/m3, saturated unit weight = 19 kn/m3 , unconfined compressive strength = 48 KPa, angle of inter friction is 25 degrees. The height
A soil stratum has two layers a 4m-thick dry sand underlain by a 5m–thick saturated sand. Dry unit weight and saturated unit weight of sand are respectively 16.21 KN/m3 and 20.88 KN/m3. How high in m should the GWT rises from the top of the saturated sand layer so thatthe effective stress at the bottom of that same layer is 104 kPa?
A vertical retaining wall 6 m high is supporting a horizontal backfill having a weight of 16.5 kN/m3 and a saturated unit weight of 19kN/m3. Angle of internal friction of backfill is 30°. Ground water table is located 3m below the ground surface. Determine the at rest lateral earth force per meter length.Determine the location of the resultant force.Determine the at rest lateral earth force per meter length if it carries a surcharge of 50 KPa. INCLUDE FBD.
A retaining wall 6 m high supports cohesionless soil having a dry density of 1600 kg/m³, angle of resistance 32 and void ratio of 0.68. The surface of the soil is horizontal and level with the top of the wall. Neglecting wall friction and using Rankine’s formula for active pressure of a cohesionless soil. 1. Determine the nearest value of the total earth thrust on the wall in KN per lineal meter if the soil is dry. a. 73.1 b. 86.7 c. 62.4 d. 98.1 2. Find the nearest value of the thrust on the wall in KN per lineal meter if owing to inadequate drainage, it is waterlogged to a level of 3.5 m below the surface. a. 112 b. 171 c. 147 d. 153 3. Find at what height above the base of the wall the thrust acts during the waterlogged condition. a. 2.21 m b. 2.00 m c. 1.74 m d. 1.42 m
A retaining wall supports a horizontal backfill that is composed of two types of soil. The first layer is 5.71 meters high. It has a unit weight of 16.03 kN/m3. The second layer is 6.21 meters and has a unit weight of 18.46 kN/m3. If the angle of friction for both layers is 37°, determine the total active force (kN) acting on the retaining wall per unit width.