Page 93 - Proceeding The 2nd International Seminar of Science and Technology : Accelerating Sustainable Innovation Towards Society 5.0

nd
The 2 International Seminar of Science and Technology
“Accelerating Sustainable innovation towards Society 5.0”
ISST 2022 FST UT 2022
Universitas Terbuka
or dry, carbon stored in peatlands can be released into the air and
become a major source of greenhouse gas emissions [2]. The
lowlands that stretch on the East Coast of South Sumatra are swamp
land, where this land as one of the natural resources that has great
potential, can be used as productive land for agriculture,
transportation, and fisheries [3]. The total area of lebak and tidal
swamps in South Sumatra is 541,461 ha spread over the Regencies
of Ogan Komering Ilir, Musi Banyuasin, and Banyuasin. The peat area
in Ogan Komering Ilir Regency has an area of 500,000 ha [4].
Peat soil has unique characteristics in terms of Atterberg boundaries
and CBR values. This is because peat soil has a high organic matter
content as one of the soil-forming materials, besides its acidity and
high-water content so that it will affect the carrying capacity of the soil
and the CBR value obtained when the soil is compacted. The CBR
(California Bearing Ratio) value of the soil is obtained by conducting
CBR tests, both laboratory tests and field tests on compacted soil. The
CBR value describes the level of soil density and the quality of the
compaction of the embankment to be tested [5]. Construction of civil
buildings on peat soils often encounter problems. This is due to the
physical properties of peat soil which has low specific gravity and
bearing capacity but has high void ratio, moisture content and
compression. Many soils are found whose physical properties do not
meet the standards for compressibility, permeability, and plasticity
values [6]. Damage to the highway is usually in the form of a decline.
Where excessive reduction will cause structural damage to the
building framework. The damage usually occurs because the soil
condition is still unreinforced so that the carrying capacity is low where
the basic soil bearing capacity requirement for roads is 6% [7].
Getting the CBR (California Bearing Ratio) value of the soil is a very
important thing to do. Because the CBR value will be used for planning
the construction of roads or airports to determine the strength of the
subgrade [8]. One of the strengths of road construction is determined
by the quality of the original soil bearing capacity as a subgrade. The
way to determine the bearing capacity of the road subgrade is the CBR

72 ISST 2022 – FST Universitas Terbuka, Indonesia
International Seminar of Science and Technology “Accelerating Sustainable
Towards Society 5.0