Geosynthetics August/September 2022 - 26

Building a reinforced
soil wall with geogrids
at hillside
Using volcanic tuff as filling material helps in the widening
of an important highway.
By Guillermo Paz
M
PROJECT HIGHLIGHTS
REINFORCED SOIL WALL
WITH GEOGRIDS
PROJECT
Widening of CA-11 highway
LOCATION
Honduras
CIVIL ENGINEERS
ICA Inversiones
GEOSYNTHETIC PRODUCT
Sierra® Slope Retention System
GEOSYNTHETIC MANUFACTURER
Tensar
Guillermo Paz has a master's in soil
mechanics and geotechnical engineering,
2019 (CEDEX-UNED), Spain.
All figures courtesy of the author.
26
Geosynthetics | August September 2022
echanically stabilized earth walls (MSE) are containment structures that have
gained considerable popularity over the last few years due to their various benefits:
constructive, environmental and economic. There are several types of reinforced
earth walls, which vary according to the type of material used to reinforce the fill and
the front facade system used.
In Honduras, the most widely used is the Sierra® Slope Retention System, which
consists of uniaxial high-density polyethylene (HDPE) geogrids with a basket-type
facade of electro-welded mesh. Constructively, this system presents execution times
that adapt to the demands of the project, being able to work in extended hours, resulting
in high construction yields. Economically, they are very competitive structures
since they use filling material from borrow pits of various granulometries close to the
construction zone. In turn, low-cost materials are used to form the facade of the wall,
such as nonwoven geotextile or electro-welded mesh. They are structures that have the
versatility to adapt to various topographic conditions, are environmentally compatible
and built to high-quality standards, and have an extended life span.
This document details the construction of an MSE 44 foot (13.5 m) high with an
electro-welded mesh facade for widening a section of one of the most important land
roads in Honduras. The road in question is located on the CA-11 highway in western
Honduras and is a very important commercial highway in the country since it connects
Honduras with Guatemala.
This road section was built in the 1970s when demographic, economic and commercial
conditions were low in Honduras, so it was built with basic engineering standards
such as a rolling surface with a double surface treatment and two lanes for circulation.
Nowadays, when commercial relations have multiplied and all types of heavy-duty
vehicles are circulating, a re-adaptation of the existing geometry of the road section is
necessary, so the national authorities opted for improvement of the radius of curve of
the section to improve the comfort and safety of the users.

Geosynthetics August/September 2022

Table of Contents for the Digital Edition of Geosynthetics August/September 2022

Geosynthetics August/September 2022 - Cover1
Geosynthetics August/September 2022 - Cover2
Geosynthetics August/September 2022 - 1
Geosynthetics August/September 2022 - 2
Geosynthetics August/September 2022 - 3
Geosynthetics August/September 2022 - 4
Geosynthetics August/September 2022 - 5
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Geosynthetics August/September 2022 - Cover3
Geosynthetics August/September 2022 - Cover4
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