Principles Of Foundation Engineering 9e
9th Edition
ISBN: 9781337705035
Author: Das, Braja M.
Publisher: Cengage,
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Chapter 19, Problem 19.3P
A braced cut shown in Figure P19.3 is to be made to a depth of 9.0 m in a saturated clay deposit where the unit weight is 17.65 kN/m3 and the undrained shear strength is 30 kN/m2. The struts are spaced horizontally at 3.0 m center to center. Find the strut loads.
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3. A deep vertical trench 11 m deep and 4 m wide is to be made in a deep deposit of clay. The
sides are supported by braced sheet piling. The topmost strut is placed at 1 m from the
ground surface and the other struts are located 2.5 m intervals after the topmost strut. If the
clay has a bulk density of 17 kN/cu.m and an unconfined compressive strength of 100 kPa.
Spacing of struts 3 m oc.
a. Determine the strut load at A.
b. Determine the strut load at B.
c. Determine the strut load at C.
d. Determine the strut load at D.
A long braced cut shown is supporting a layer of clay. Angle of fraction is 0. The struts are placed 3m center to center. a.) Determine the reaction of the strut at B.
b.) Determine the section modulus of wale at B if the allowable bending stress is 0.6Fy where Fy = 250Mpa
A braced cut, 5 m wide and 7.5 m deep
is proposed in a cohesionless soil deposit
having effective cohesion c = 0 and
effective friction angle, =36°. The
first row of struts is to be installed at a
depth of 0.5 m below ground surface and
spacing between the struts should be 1.5
m. If the horizontal spacing of struts is 3
m and unit weight of the deposit is 20
kN / m', the maximum strut load will
be.
Chapter 19 Solutions
Principles Of Foundation Engineering 9e
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- The elevation and plan of a bracing system for an open cut in sand are shown in Figure 14.21. Using Pecks empirical pressure diagrams, determine the design strut loads. Given: sand = 18 kN/m3, ' = 38, x = 3 m, z = 1.25 m, and s = 3 m.arrow_forwardDetermine the factor of safety against bottom heave for the braced cut described in Problem 15.18. Use Eqs. (15.66) and (15.70). For Eq. (15.70), assume the length of the cut, L = 18 m. 15.18 Refer to Figure 15.51 in which = 17.5 kN/m3, c = 60 kN/m2, and center-to-center spacing of struts is 5 m. Draw the earth pressure envelope and determine the strut loads at levels A, B, and C. FIG. 15.51arrow_forwardANSWER SHOULD BE ANSWER KEY: 43) 14.2 MPa 44) 90 mm 45) 0.33 MPaarrow_forward
- Extra Question: If the Dead load in the slab shown is 24 KN/m^3, determine the end support reaction at beam BE. A E B S1 (200 mm) 1.5 m Option 1 a) 16.1 KN Ob) 17.1 KN Oc) 18.1 KN Od) 19.1 KN S2 (150 mm thick) 4.0 m S1 (200 mm) 1.5 m > 4.5marrow_forwardThe cross section of a braced cut supporting a sheet pile installation in a clay soil is shown in Figure 14.22. Given: H = 12 m, clay = 17.9 kN/m3, = 0, c = 75 kN/m2, and the center-to-center spacing of struts in plan view, s = 3 m. a. Using Pecks empirical pressure diagrams, draw the earth-pressure envelope. b. Determine the strut loads at levels A, B, and C.arrow_forwardUse consistent deformation method?arrow_forward
- I need detailed explanation solving this exercise from Foundation Engineering, step by step please.arrow_forwardH.W 2: _Find the collapse load (Wu) for the isotropic slab shown below by using yield line theory. Assume m* =m= 25 kN.m 6 m 4 m 3 m 3 marrow_forwardIf FA = 40 kN and FB = 35 kN, determine the magnitude of the resultant force and specify the location of its point of application (x, y) on the slab.arrow_forward
- Please solve the question in the image provided. please solve it.arrow_forwardQ1arrow_forwardQ3) A retaining structure is given in figure. Calculate the factor of safety against sliding. (Ignore tensile crack behavior inside active part and ground water condition. Take 1.0 m interval step for point load calculation. k₁= k₂= 0.9). 3.B m 2.C m Yn: 20.0 kN/m² D: 2Eº c: 30 kN/m² 0.5 m 0.5 m 1 3.0 m 5.0 m Y cone ➜ 5A0 KN Yn: 18.5 kN/m³ c: 18 kN/m² $: ID º 24.0 kN/m³arrow_forward
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How to build angle braces; Author: Country Living With The Harnish's;https://www.youtube.com/watch?v=3cKselS6rxY;License: Standard Youtube License