ENGINEERING GEOLOGICAL MAPPING AND DURABILITY ANALYSIS OF JATILUHUR FORMATION CLAYSTONE IN THE AREA AROUND CISOMANG BRIDGE AREA, CIKALONG WETAN DISTRICT, WEST BANDUNG REGENCY, WEST JAVA
The research area is located at coordinates 6o 42’ 00” S - 6 o 42’ 15” S dan 107 o 25’ 55” E - 107 o 26’ 10” E and administratively located in Darangdan District, Purwakarta Regency and Cikalong Wetan District, Bandung Barat Regency, in West Java. The area is about 0,25 km2 wide. The purposes of...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/22570 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The research area is located at coordinates 6o 42’ 00” S - 6 o 42’ 15” S dan 107 o
25’ 55” E - 107 o 26’ 10” E and administratively located in Darangdan District, Purwakarta
Regency and Cikalong Wetan District, Bandung Barat Regency, in West Java. The area is
about 0,25 km2 wide. The purposes of this research are to identify the engineering geologic
condition by doing engineering geological mapping with 1 : 2500 scale and to analize the
durability of Jatiluhur Formation claystone with slake durability test. The methods used in
this research are literature study, field mapping, testing rock and soil samples in the
laboratory.
The research area contains hills and a valley with slope ranging from 0% to more
than 140%. Geomorphical processes occuring in the area are erosion (rill, gully and
headward erosion), mass movement (rotational landslide and creep) and sedimentation.
Water springs found in the area are contact spring and depression spring with the relation
between groundwater and river is efluent. The engineering geological condition of the area
can be divided into Claystone Unit, Volcanic Breccia unit, Sand with Gravel Unit,
Colluvial Unit, Alluvial Unit, Embankment Soil Unit. Geological structures found in the
Claystone unit are NE-SW and NW-SE trending shear fractures and E-W trending bedding
plane. Geological hazards potentially occur in the area are mass movement in steep slope
area and flood around the Cisomang River.
From the slake durability test done in the laboratory, Jatiluhur Formation claystone
has low-medium durability (Id2 = 48,1-74,8 %). The factor affecting the durability of the
claystone is the mineral content such as quartz, kaolinite, montmorilonite and pyrite. |
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