In a separate region of the new E-W highway proposed by the Maine DOT an 18 ft. highwayembankment will be constructed and overly a 10 ft thick layer of soft clay. The embankment will becompacted with an undrained strength of 800 psf and the soft clay has a measured strength of 450 psf.The DOT would like to maintain a factor of safety of at least 1.5.a. Draw the critical failure service and compute the factor of safety using the Swedish method andsolution charts from DM7.1 (handouts in class)H= 18 ftSoft ClaySu = 450 psf7 = 120 pcfHard, competent materialN.T.SRoadwayClay FillSu = 800 psf7 = 120 pcfD = 10 ft

To compute the factor of safety using the Swedish method and solution charts from DM7.1, we need to…

In a separate region of the new E-W highway proposed by the Maine DOT an 18 ft. highw embankment will be constructed and overly a 10 ft thick layer of soft clay. The embankment will compacted with an undrained strength of 800 psf and the soft clay has a measured strength of 450 p The DOT would like to maintain a factor of safety of at least 1.5. a. Draw the critical failure service and compute the factor of safety using the Swedish method a solution charts from DM7.1 (handouts in class) H= 18 ft Soft Clay Su = 450 psf 7 = 120 pcf Hard, competent material N.T.S Roadway Clay Fill Su = 800 psf 7 = 120 pcf D = 10 ft

In a separate region of the new E-W highway proposed by the Maine DOT an 18 ft. highw embankment will be constructed and overly a 10 ft thick layer of soft clay. The embankment will compacted with an undrained strength of 800 psf and the soft clay has a measured strength of 450 p The DOT would like to maintain a factor of safety of at least 1.5. a. Draw the critical failure service and compute the factor of safety using the Swedish method a solution charts from DM7.1 (handouts in class) H= 18 ft Soft Clay Su = 450 psf 7 = 120 pcf Hard, competent material N.T.S Roadway Clay Fill Su = 800 psf 7 = 120 pcf D = 10 ft

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.

Question

In a separate region of the new E-W highway proposed by the Maine DOT an 18 ft. highway
embankment will be constructed and overly a 10 ft thick layer of soft clay. The embankment will be
compacted with an undrained strength of 800 psf and the soft clay has a measured strength of 450 psf.
The DOT would like to maintain a factor of safety of at least 1.5.
a. Draw the critical failure service and compute the factor of safety using the Swedish method and
solution charts from DM7.1 (handouts in class)
H= 18 ft
Soft Clay
Su = 450 psf
7 = 120 pcf
Hard, competent material
N.T.S
Roadway
Clay Fill
Su = 800 psf
7 = 120 pcf
D = 10 ft

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