top-down construction pekerjaan · pdf filepekerjaan besmen galian tanah lereng galian stabil...
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SI-6224 Kuliah Ke-6 Topik Khusus Geoteknik
Fakultas Teknik Sipil dan Lingkungan
Institut Teknologi Bandung
Top-Down ConstructionDavy Sukamta
Davy Sukamta and Partners
Pekerjaan Besmen
Galian tanah
Lereng galian stabil
Dasar galian stabil
Tempat relatif kering
Besmen tidak bocor
2 Cara Pekerjaan BesmenPenggalian terbuka- Lereng natural- Lereng diperkuat
Pasang konstruksi penahan tanah, lalu menggali sambil memasang tumpuan (support)
DAVY SUKAMTA & PARTNERS, Structural Engineers
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DAVY SUKAMTA & PARTNERS, Structural Engineers DAVY SUKAMTA & PARTNERS, Structural Engineers
Soldier Pile
Contiguous Bored Pile
Secant Pile
Diaphragm Wall
Precast Wall
Steel Strut
Ground Anchor
Concrete Slab (Top Down Construction)
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THE BELLAGIO RESIDENCE, galian 10.5 m
Contiguous Bored Pile DAVY SUKAMTA & PARTNERS, Structural Engineers
Precast Diaphragm Wall
DAVY SUKAMTA & PARTNERS, Structural Engineers
PONDOK INDAH MALL II galian 14.25 m
SECANT PILE with GROUND ANCHORSDAVY SUKAMTA & PARTNERS, Structural Engineers
Buat struktur penahan tanah keliling
Buat tiang bor dan pasang king post
Gali tanah
Cor slab atas yang berfungsi sebagai support
dst
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RC Slabs Act as Struts supporting the Retaining Structure
DAVY SUKAMTA & PARTNERS, Structural Engineers
Positif:- Sangat stabil /
deformasi kecil- Slab berfungsi
ganda untukgravity system dan strut / horisontal support
Negatif:- Perancangan
lebih sulit –sekwenpekerjaan harusdikaji dari awal
- Penggalian tanahlebih sulit
STUDI KASUSMENARA BANK MEGAJAKARTA
26 lantai dengan 4 lapis besmen
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Pemasangan King-post ke dalam Tiang Bor
TAHAP 1
Pembuatan Secant PilePembuatan BoredpilePemasangan KingpostPenggalian sampai B-1
[1]
-3.600
[1]
-4.100
[2] [2]
[3] [3]
STAGE 1 : Insert Secant Pile L= 21 m & excav to -4.10 m
DisplacementsMomentShear
-30.00 -10.00 10.00 30.00
-750.0 -250.0 250.0 750.0
-300.0 -100.0 100.0 300.0
Displacement [mm]
Moment [kNm/m]
Shear [kN/m]
Scale x 1:150 y 1:150
-20.00
-18.00
-16.00
-14.00
-12.00
-10.00
-8.000
-6.000
-4.000
-2.000
.0
Analisis mengikuti sekwen kerja
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TAHAP 2
Pengecoren lantai LG(B-1)[1]
-3.600
[1]
-4.100
[2] [2]
[3] [3]
0.00 kN/m
STAGE 2 : Cast slab (Lower Ground) as first strut at -3.60 m
DisplacementsMomentShear
-30.00 -10.00 10.00 30.00
-750.0 -250.0 250.0 750.0
-300.0 -100.0 100.0 300.0
Displacement [mm]
Moment [kNm/m]
Shear [kN/m]
Scale x 1:150 y 1:150
-20.00
-18.00
-16.00
-14.00
-12.00
-10.00
-8.000
-6.000
-4.000
-2.000
.0
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TAHAP 3
Penggalian sampai P2(B-3)Pengecoran lantai P2Penggalian sampai P3
[1]
-3.600
[1]
-10.10
[2] [2]
[3] [3]
182.42 kN/m
STAGE 3 : Excav to -10.10 m ,dewatering to - 11.00 m
DisplacementsMomentShear
-30.00 -10.00 10.00 30.00
-750.0 -250.0 250.0 750.0
-300.0 -100.0 100.0 300.0
Displacement [mm]
Moment [kNm/m]
Shear [kN/m]
Scale x 1:150 y 1:150
-20.00
-18.00
-16.00
-14.00
-12.00
-10.00
-8.000
-6.000
-4.000
-2.000
.0
Strut di LG sudah bekerja
[1]
-3.600
[1]
-10.10
[2] [2]
[3] [3]
182.42 kN/m
0.04 kN/m
STAGE 4 : Cast slab (Basement 2) as second strut at -9.60 m
DisplacementsMomentShear
-30.00 -10.00 10.00 30.00
-750.0 -250.0 250.0 750.0
-300.0 -100.0 100.0 300.0
Displacement [mm]
Moment [kNm/m]
Shear [kN/m]
Scale x 1:150 y 1:150
-20.00
-18.00
-16.00
-14.00
-12.00
-10.00
-8.000
-6.000
-4.000
-2.000
.0
Strut di P2 baru dipasang
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9
TAHAP 4
[1]
-3.600
[2]
[2]
-13.30
[3] [3]
124.38 kN/m
379.83 kN/m
STAGE 5 : Excav to -13.30 m ,dewatering to -15 m
DisplacementsMomentShear
-30.00 -10.00 10.00 30.00
-750.0 -250.0 250.0 750.0
-300.0 -100.0 100.0 300.0
Displacement [mm]
Moment [kNm/m]
Shear [kN/m]
Scale x 1:150 y 1:150
-20.00
-18.00
-16.00
-14.00
-12.00
-10.00
-8.000
-6.000
-4.000
-2.000
.0
10
[1]
-3.600
[2]
[2]
-13.30
[3] [3]
124.44 kN/m
375.95 kN/m
29.87 kN/m
STAGE 6 : Cast Basement 3
DisplacementsMomentShear
-30.00 -10.00 10.00 30.00
-750.0 -250.0 250.0 750.0
-300.0 -100.0 100.0 300.0
Displacement [mm]
Moment [kNm/m]
Shear [kN/m]
Scale x 1:150 y 1:150
-20.00
-18.00
-16.00
-14.00
-12.00
-10.00
-8.000
-6.000
-4.000
-2.000
.0
DAVY SUKAMTA & PARTNERS, Structural Engineers
Galian Tanah P3 dibawah Slab P2
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TAHAP 5
[1]
-3.600
[2]
[2]
-13.30
[3] [3]
124.44 kN/m
375.95 kN/m
29.87 kN/m
0.00 kN/m
STAGE 7 : Cast Basement 1
DisplacementsMomentShear
-30.00 -10.00 10.00 30.00
-750.0 -250.0 250.0 750.0
-300.0 -100.0 100.0 300.0
Displacement [mm]
Moment [kNm/m]
Shear [kN/m]
Scale x 1:150 y 1:150
-20.00
-18.00
-16.00
-14.00
-12.00
-10.00
-8.000
-6.000
-4.000
-2.000
.0
[1]
-3.600
[2]
[2]
-13.30
[3] [3]
Envelope of results (all stages)
DisplacementsMomentShear
-30.00 -10.00 10.00 30.00
-750.0 -250.0 250.0 750.0
-300.0 -100.0 100.0 300.0
Displacement [mm]
Moment [kNm/m]
Shear [kN/m]
Scale x 1:150 y 1:150
-20.00
-18.00
-16.00
-14.00
-12.00
-10.00
-8.000
-6.000
-4.000
-2.000
.0
Envelope BM diagram untuk perancangan D-Wall
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DAVY SUKAMTA & PARTNERS, Structural Engineers Penggalian Tanah di Dasar Besmen
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DAVY SUKAMTA & PARTNERS, Structural Engineers
Pengecoran mat foundation + 3240 m3 dalam 36 jam
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DAVY SUKAMTA & PARTNERS, Structural Engineers
TOP DOWN CONSTRUCTION
DAPAT MEMBERIKAN SOLUSI
YANG BAIK DAN EKONOMIS
BILA DITERAPKAN SECARA
TEPAT GUNA
DAVY SUKAMTA & PARTNERS, Structural Engineers
Terima KasihTOP DOWN CONSTRUCTION DAPAT MEMBERIKAN SOLUSI YANG
BAIK DAN EKONOMIS BILA DITERAPKAN SECARA TEPAT GUNA