Geosynthetics June/July 2019 - 16

Geogrid reinforced soil structures reach new heights

been continuously incorporated into new
geosynthetic products, enhancing geosynthetic material properties used in geotechnical applications. Advancement of geosynthetic materials as reinforcement for
reinforced soil structures is still progressing, and improvements are being made in
the way MSE walls and RSS are designed
and constructed. To date, thousands of
geosynthetic-reinforced soil structures
have been designed and successfully

FIGURE 2 Generic cross section of an MSE wall

FIGURE 3 Generic cross sections of reinforced soil slope (RSS)
16

Geosynthetics | June July 2019

constructed for highways and other applications, which include MSE wall and RSS
systems. A large portion of these structures were designed with geogrid products
as a reinforcement element.

Design methodology
and considerations
The design of MSE walls and RSS relies
more heavily on the input of the geotechnical engineer than for traditional wall
systems and unreinforced embankments.
The design steps are also more extensive,
and the design of soil-reinforced structures
requires a shared design responsibility
between material suppliers and owners or
the owners' engineer. Traditionally, all civil
engineering features in North America
were designed using the allowable stress
design (ASD) platform methodology. More
recently (1994 in the U.S.), a load and resistance factor design (LRFD) methodology
has been implemented in highway structure design practices such as MSE walls.
The LRFD method in various forms is
now being applied throughout the world.
For example, Eurocode uses the limit state
design (LSD) methodology, which is very
similar to the LRFD methodology. The
LRFD methodology has not developed yet
for engineered embankments and RSS. A
limit equilibrium, ASD approach is still
used for RSS and the factor of safety must
be adequate for both the short- and longterm conditions for all possible modes of
failure. Regardless of the design platform
methodology, the core analytical methods
for soil-reinforced structures, such as external and internal stability evaluation, remain
unchanged. The primary change is in the
way the loads and resistances are compared
and how uncertainty is incorporated in
the design process. Computer programs
such as MSEW and ReSSA, developed by
ADAMA Engineering Inc., are among the
most commonly used software for design
of MSE walls and RSS, respectively.



Geosynthetics June/July 2019

Table of Contents for the Digital Edition of Geosynthetics June/July 2019

Geosynthetics June/July 2019 - Cover1
Geosynthetics June/July 2019 - Cover2
Geosynthetics June/July 2019 - 1
Geosynthetics June/July 2019 - 2
Geosynthetics June/July 2019 - 3
Geosynthetics June/July 2019 - 4
Geosynthetics June/July 2019 - 5
Geosynthetics June/July 2019 - 6
Geosynthetics June/July 2019 - 7
Geosynthetics June/July 2019 - 8
Geosynthetics June/July 2019 - 9
Geosynthetics June/July 2019 - 10
Geosynthetics June/July 2019 - 11
Geosynthetics June/July 2019 - 12
Geosynthetics June/July 2019 - 13
Geosynthetics June/July 2019 - 14
Geosynthetics June/July 2019 - 15
Geosynthetics June/July 2019 - 16
Geosynthetics June/July 2019 - 17
Geosynthetics June/July 2019 - 18
Geosynthetics June/July 2019 - 19
Geosynthetics June/July 2019 - 20
Geosynthetics June/July 2019 - 21
Geosynthetics June/July 2019 - 22
Geosynthetics June/July 2019 - 23
Geosynthetics June/July 2019 - 24
Geosynthetics June/July 2019 - 25
Geosynthetics June/July 2019 - 26
Geosynthetics June/July 2019 - 27
Geosynthetics June/July 2019 - 28
Geosynthetics June/July 2019 - 29
Geosynthetics June/July 2019 - 30
Geosynthetics June/July 2019 - 31
Geosynthetics June/July 2019 - 32
Geosynthetics June/July 2019 - 33
Geosynthetics June/July 2019 - 34
Geosynthetics June/July 2019 - 35
Geosynthetics June/July 2019 - 36
Geosynthetics June/July 2019 - 37
Geosynthetics June/July 2019 - 38
Geosynthetics June/July 2019 - 39
Geosynthetics June/July 2019 - 40
Geosynthetics June/July 2019 - 41
Geosynthetics June/July 2019 - 42
Geosynthetics June/July 2019 - 43
Geosynthetics June/July 2019 - 44
Geosynthetics June/July 2019 - 45
Geosynthetics June/July 2019 - 46
Geosynthetics June/July 2019 - 47
Geosynthetics June/July 2019 - 48
Geosynthetics June/July 2019 - 49
Geosynthetics June/July 2019 - 50
Geosynthetics June/July 2019 - 51
Geosynthetics June/July 2019 - 52
Geosynthetics June/July 2019 - 53
Geosynthetics June/July 2019 - 54
Geosynthetics June/July 2019 - 55
Geosynthetics June/July 2019 - 56
Geosynthetics June/July 2019 - Cover3
Geosynthetics June/July 2019 - Cover4
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-october-november-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-august-september-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-june-july-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-april-may-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-february-march-2021
https://www.nxtbook.com/ifai/geosynthetics/1220GS
https://www.nxtbook.com/ifai/geosynthetics/1020GS
https://www.nxtbook.com/ifai/geosynthetics/0820GS
https://www.nxtbook.com/ifai/geosynthetics/0620GS
https://www.nxtbook.com/ifai/geosynthetics/0420GS
https://www.nxtbook.com/ifai/geosynthetics/0220GS
https://www.nxtbook.com/ifai/geosynthetics/1219GS
https://www.nxtbook.com/ifai/geosynthetics/1019GS
https://www.nxtbook.com/ifai/geosynthetics/0819GS
https://www.nxtbook.com/ifai/geosynthetics/0619GS
https://www.nxtbook.com/ifai/geosynthetics/0419GS
https://www.nxtbook.com/ifai/geosynthetics/0219GS
https://www.nxtbook.com/ifai/geosynthetics/1218GS
https://www.nxtbook.com/ifai/geosynthetics/1018GS
https://www.nxtbook.com/ifai/geosynthetics/0818GS
https://www.nxtbook.com/ifai/geosynthetics/0618GS
https://www.nxtbook.com/ifai/geosynthetics/0418GS
https://www.nxtbook.com/ifai/geosynthetics/0218GS
https://www.nxtbookmedia.com