STUDI PERANCANGAN PERBANDINGAN KONSTRUKSI DINDING PENAHAN TANAH KANTILEVER DAN COUNTERFORT PADA RUAS JALAN SOEKARNO-HATTA KM 2 STA 0+000-0+050 KABUPATEN KUTAI TIMUR

Abstract

East Kutai Regency is one of the regencies in East Kalimantan Province. The capital city
of the regency is located in Sangatta which has an area of 35,747,50 km² which has great
potential to experience avalanches, especially on road network. The purpose of this research is to
know the comparison of Kantilever type of retaining wall and Counterfourd on Jalan SoekarnoHatta

Km 2 STA 0 + 000 - 0 + 050 Sangatta city in terms of implementation and security.
Limitations of this research problem, The location of the research in Soekarno-Hatta Road Km 2
STA 0 + 000 - 0 + 050 Sangatta city, excluding the implementation method, and calculation only
the pressure and stability of shear, rolling and collapse.
Method of data return that is primary and secondary data, primary data that is
topographic data, boring data, data sondir then do with laboratory test and secondary data from
planning data. Converse - Labarre Formula.
Based on the results of the laboratory results obtained no effect of pore water in the soil.
Furthermore, the slope stability analysis using the fellenius method with SF
(Safety factor
) 2,11>
1, is declared stable slope. Calculation of cantilevered cantilever wall structure Rankine method
can be active soil pressure value Ka = 0.44 and passive soil pressure Kp = 2.27 and Coulumb
method in Ka value = 0.39 and Kp = 3.49. Calculation of bolsters by Rankine Fguling = 2.35 and
according to Coulumb Fguling = 2.7. Calculation of shear forces in can ΣRh = 134 , 99 kN / m,
according to Rankine Fgeser = 2.34 and according to Coulumb Fgeser = 2.81. The ultimate
support capacity according to Rankine is qult = 333,95kN / m2, the safety factor to the collapse of
the carrying capacity F = 4.91, and according to Coulumb q ult = 394,357kN / m2 with the value
of the carrying capacity F = 6.3. single pole for cantilevered retaining wall with CPT 517,05kN,
SPT 552,829 kN, 6404,22kN group pole, 12 poles and single pile for retaining walls Counterfort
value of group pole 7422,59 kN, number of pile 14 fruit.
The analysis result can be concluded the ratio of Cantilever and Counterfort to the
stability of bolsters by Rankine 2.35 <2.42 and according to Coulumb 2.66 <2.74. Shear stability
by Rankine 2.34 <2.50 and according to Coulumb 2.81 <3. Stability of collapse according to
Rankine 4.91> 3.74 and according to Coulumb 6.31> 4.73.