DAYA DUKUNG TANAHFONDASI DANGKAL PADA BUKIT HAMBALANG BAGIAN SELATAN KECAMATAN CITEUREUP KABUPATEN BOGOR PROVINSI JAWA BARAT
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Date
2007
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Abstract
ABSTRAK
Penelitian dilakukan di kaki Bukit Hambalang bagian
Selatan yang mencakup kompleks pembangunan Wisma Atlet Hambalang, Kecamatan
Citeureup, Kabupaten Bogor, Propinsi Jawa Barat.Daerah penelitian terletakpada 106° 53` 3,7608" - 106° 53` 32.1072" LS dan 6° 33` 5,5584" - 6° 33` 37,3608" BT. Seiring dengan
terjadinya longsoran di beberapa titik wilayah pembangunan Wisma Atlet
Hambalang, maka diperlukankajiandatakondisigeologiteknik yang berupa sifat fisik dan mekanika tanah dan juga
batuan bawah permukaan.Terutamamengenaidayadukungtanahdalammenahanbebanbangunan
di atasnya agar tidakterjadipenurunanatausettlement.
Berdasarkan
pembagian litostratigrafi tidak resmi, di daerah penelitian terdapat tiga
satuan batuan, yaitu satuan batupasir, satuan batulanau dan satuan batuan
vulkanik. Struktur
geologi yang berkembang pada daerah penelitian adalah kekar, dengan hasil
proyeksi stereografi menunjukkan gaya berarah relatif Utara – Selatan.
Satuantanahdaerahpenelitianmasukkedalamklasifikasitanahlempungdengantingkatplastisitas
yang rendah dan tinggi (CL – CH), serta tanah
lanau dengan plastisitas rendah dan tinggi (ML – MH).
HasilperhitunganfondasidangkaluntukGeneral soil shear condition danlocal soil shear conditiondapatdisimpulkanbahwadayadukungtanah
yang diizinkan (qa) untuksetiapkedalaman yang paling tinggipadafondasibujursangkar
(square footing)
dannilaitertinggiterdapatpadakedalaman 2 meter, yaitu57,32 ton/m2dan36,11 ton/m2. Fondasi yang paling rendahuntuksemuakedalamanpadafondasimenerus
(continuous footing) untukkedalaman 2 meter memilikinilai34,49 ton/m2dan21,25 ton/m2.
Berdasarkan data SPT (Standard
Penetration Test), maka nilai daya dukung yang diizinkan (qa) pada
masing-masing titik bor berkisar pada rentang 2,85 ton/m2 sampai
16,85 ton/m2.
ABSTRACT
This research is
located inSouthern Hambalang hill which included Hambalang Sport Center
Buliding Area, Citeureup District, Bogor Regency, West Java Province. This
research area geographicaly lies on106° 53` 3,7608" - 106° 53` 32.1072" LS dan 6° 33` 5,5584" - 6° 33` 37,3608" BT.Along with landslide
in some area at Hambalang Sport Center Building, it needs geological
engineering study data such as mechanical and physical properties of soil also
subsurface rocks. Especially about soil bearing capacity in order to restrain
the building from settlement.
Based on non-formal litostratigraphy units,
this area divided into three units, those areunit of sandstones, unit of
siltstones and unit of volcanoclastics.Structural geology that developed in
this area are joints, which
stereographic projection result indicated North – South direction of force.
Unit of soils in this area classified
onto clay soil with low to high plasticity (CL – CH), then silt soil with low
to high plasticity (ML – MH).
The shallow foundation calculation results for
General soil shear condition and local soil shear condition it could be
conclused that the allowable shallow soil foundation (qa) for all depth which
is highest at square footing and the highest value at 2 metre of depth, that is
57,32 ton/m2and36,11 ton/m2. The lowest footing for all
depth at continous footing at 2 metre of depth had value 34,49 ton/m2and21,25 ton/m2. Based on SPT (Standard
Penetration Test), the allowable support stability (qa) each of borehole
ranging from 2,85 ton/m2 to 16,85 ton/m2.
Description
Keywords
Wisma Atlet Hambalang, Kecamatan Citeureup, Tidak ada keyword