A cut was made in a homogeneous clay soil to a depth of 8 m as shown in below Figure. The total unit weight of the soil is 18 kN/m³, and its cohesive strength is 25 kN/m². Assuming a = 0 condition, determine the factor of safety with respect to a slip circle passing through the toe using Swedish circle method. Consider a tension crack at the end of the slip circle on the top of the cut. 8 m R = 12 m 39⁰ 6m Trial slip circle y = 18 kN/m³ c'= 25 kN/m² o'=0

A cut was made in a homogeneous clay soil to a depth of 8 m as shown in below Figure. The total unit weight of the soil is 18 kN/m³, and its cohesive strength is 25 kN/m². Assuming a = 0 condition, determine the factor of safety with respect to a slip circle passing through the toe using Swedish circle method. Consider a tension crack at the end of the slip circle on the top of the cut. 8 m R = 12 m 39⁰ 6m Trial slip circle y = 18 kN/m³ c'= 25 kN/m² o'=0

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter15: Braced Cuts

Section: Chapter Questions

Problem 15.5P

See similar textbooks

Similar questions

Properties of soil and concrete 4m O = 30° Cohesion =0 Coefficient of base friction = 0. 50 Soil's ultimiate bearing capacity= 425 kNm deoncrete = 23.6 kN /m? Use Ronkine's theory considering no evoson and future excavation would happen in the Soil. %3D 12 D. %3D a) Determine the location of the active force from the base. b) Determine the total noirmal force reaction of soil at the boser c) Determine FS SLIDING . d) Determine FSauturning o e) Determine FSpering.
A cut slope was excavated in sand. The slope is shown in following attachment . To find the properties of the sand, representative samples were taken for the soil and tested in atriaxial apparatus. A consolidated drained triaxial test was conducted. The result is given below:Chamber pressure = 103 kN/m2Deviator stress at failure = 234.6 kN/m2We know the unit weight of the sand is 16 kN/m3.Use the ordinary method of slices (use 7 slices) and estimate the factor of safety against sliding forshown slip surface and comment on the calculated factor of safety.Please note that:1. The figure is not in scale. You may resketch it in scale and calculate the factor of safety2. The slip surface is circular and passes through the toe of the embankment
The pipe bend shown is in a horizontal plane. Oil with 8=0.86 enters the realucing baned seetion A with a velocity of 3.2 mls, and a pressure of 150K Pa.e Determine the fulce required t hold the bend in place 3.2 mls 30 section A
The location of trial failure surface on a slope is shown in Figure and the stress components for each slice are listed in Table. Slice Shearing component (kN.m') -0.280 -0.227 0.383 3.214 6.543 8.368 9.792 Normal Length of trial failure surface=11m Soil friction angle 6° Cohesion, c=28kPa No. component (kN.m') 1.911 7.745 13.139 1 2 4 16.344 17.625 16.718 12.125 7 8. 4.228 0.486 Trial Failure Surface (a) Compute the driving stress. (b) Compute the stabilizing stress. (c) Analyze the safety of the slope.
A cutting is made in clay y=20kN/m³, ¤ =0, c = 35 kN/m2. Take FOS= 1.5 and Sn = 0.17. Maximum depth of cutting will be, 5.86 10.29 m 6.86 m 9.29
4- A moderately curved channel with a slightly rounded non-cohesive bed material with a diameter of d50 = 25 mm carrying a discharge of 30 m³/s. The longitudinal slope of the channel is 0.001 and the side wall slopes are designed to be 60% of the angle of repose of the bed material Note: Use the Strikler's formula to calculate Manning's value. Use the Swammy and Mittal's formula to estimate the critical shear stress. Use the free board depth of 0.5m. a) Design the channel using the tractive force method for a Boly ratio of 20 b) Design the channel using the most efficient hydraulic section c) Discuss about the channel stability and erosion for both designs in parts a and b Strickler (Chow, 1959) proposed a correlation between the mean diameter of bed material, dso, and the Manning's coefficient as: n = 0.039d¹/6 Swamee and Mittal (1976) proposed an explicit equation to express the Sheild's curve defined as: 50 0.409d² 1/2 (1+0.177d² )¹/¹² T = 0.155+.
4- A moderately curved channel with a slightly rounded non-cohesive bed material with a diameter of d50 = 25 mm carrying a discharge of 30 m³/s. The longitudinal slope of the channel is 0.001 and the side wall slopes are designed to be 60% of the angle of repose of the bed material Note: Use the Strikler's formula to calculate Manning's value. Use the Swammy and Mittal's formula to estimate the critical shear stress. Use the free board depth of 0.5m. a) Design the channel using the tractive force method for a Bo/y ratio of 20 b) Design the channel using the most efficient hydraulic section c) Discuss about the channel stability and erosion for both designs in parts a and b Strickler (Chow, 1959) proposed a correlation between the mean diameter of bed material, deo, and the Manning's coefficient as: n = 0.039d¹/6 Swamee and Mittal (1976) proposed an explicit equation to express the Sheild's curve defined as: T = 0.155+ To 50 0.409d² (1+0.177d²)
Given The uniformly loaded area shown below is built on the ground surface and carries a load of 160 kPa. D1-8 m D2 = 12 m D3 = 4 m D4-5 m D5 = 3 m D1 D3 D2 D5 A D4 Required Determine the vertical stress increment at a depth of 10 m below Point A. Provide answer in kN/m², to the nearest 100th.
vay vay vay vay vay Determine the stresses at the top and the bottom of the cut shown in figure. Also determine the maximum depth of potential crack and the maximum depth of unsupported excavation. = 120 c=20 kN/m y=18 kN/m 4 m 32.4 m 14.8
By using the yield line theory, find the value of uniformly load (w) of the Isotropic slab, take negative m- = 31 kN.m and positive m+ = 20 kN.m. ше 4m 4m ws 3m
3. In a saturated soil(5 m) below determine and draw the total, pore water and effective stress at element A. Yw=9.8 and Ysat=20kn/m3(table1.) piezometer piezometer piezometer 主十主 water level 2m 2m 2m water level 3m 3m 3m water level Table1. Point o = YsatZ(kN/m²) U = YwZ o' = 0 – u A(a) A(b) A(c) b) Draw the straight line for all stress.
[?] ?? = [150 −60−60 −180]➢ Determine and graph using Mohr's circle the principal stresses and theaddresses associated with these.➢ Determine and graph the maximum shear stresses.➢ Plot the possible failure planes.➢ Finally, what is the value of the maximum tangential stress and at whatorientations take place?