EVALUASI PENANGANAN KELONGSORAN PADA RUAS JALAN MAJENANG-WANAREJA (CILACAP) DAN PENANGANANNYA DENGAN GEOTEKSTIL
ABSTRACT: There have been
significant number of road damages due to soil base instability, and this problem should be solved immediately because
road (highway) is an important transportation infrastructure. One of
alternative solution for this problem is using geotectile as strengthening
material. According to direct visual inspection, soil is consisted of red clay
soil which has high plasticity and shrinkage. This research took place at
Majenang – Wanareja Road (KM 89 +100 – KM 89 +600). The research method for
Wanareja soil was using direct survey at KM 89 +150 and taking soil sample, and
then doing some laboratory experiment at Civil Engineering Laboratory Faculty
of Engineering UMS. The laboratory experiment was done to find and analyse the
soil physics and mechanic characteristic
including soil cohessivity, the angle of soil shear, and the CBR value. After
finding the soil characteristic, woven geotectile was designed. The result of soil
characteristic test was data required in calculation, i.e., flatten load =
26,148 ton/m; saturated soil specific gravity for filled-soil = 1,6794 ton/m3 ,
the angle of inner shear = 29,637o, and
soil cohessivity = 1,813 ton/m2; whereas for base soil, saturated soil specific
gravity = 1,5061 ton/m3, the angle of inner shear = 25,106o, and soil cohessivity = 2,044 ton/m2. The
final result of this analysis was that
the use of woven geotectile WG – 350 with ultĪ = 11,072 ton/m2 is
feasible to be used as strengthening material, because it can detain moment
with safety factor (SF = 3,153 > 1,5); can detain shear with safety factor
(SF = 2,405 > 1,5); and can detain soil strength compression with safety
factor (SF = 3,097 > 2,0).
Key words: kerusakan jalan, geotekstil woven, karakteristik
tanah
Penulis: Qunik Wiqoyah, Sri
Mulyani Retno Wulan
Kode Jurnal: jptsipildd060006
