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Sheet Pile (Dinding Turap) gudang SIVA 1 kapal sheet pile

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Page 1: Sheet Pile (Dinding Turap) - widodosuyadi.lecture.ub.ac.idwidodosuyadi.lecture.ub.ac.id/files/2013/03/MINGGU-12-Sheet-Pile-1... · Sheet Pile (Dinding Turap) gudang SIVA 1 kapal sheet

Sheet Pile (Dinding Turap)

gudang

SIVA1

kapal

sheet pile

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Sheet Piles

~ turap baja atau kayu dipancang ke dalam tanah, yang membentuk dinding menerus

gudang

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kapal

sheet pile

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Sheet piles

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Z piles

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Interlocking steel sections

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Sheet piles - apa, dimana dan kapan

� Dinding fleksibel pelat baja yang interlocking - single atau double

� Bagian atas dapat

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� Bagian atas dapat ditahan oleh satu atau lebih anchors dan ties

� Terutama dipakai untuk dermaga & galian sementara

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Cofferdams

� Forces due to Soil Loads

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Cofferdams

� Traditional Sheet Pile Shapes

Z-Type (Z) Larson / “U” Type (U)

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Z-Type (Z)Used for intermediate to deep

wall construction

Larson / “U” Type (U)Used for applications similar

to Z - Type

Flat / Straight Type (SA), (S)Used for filled cell construction

Arch shaped & lightweightUsed for shallower wall

construction

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Cofferdams� Typical types of interlocks

Ball & Socket (BS) Single Jaw (SJ) Double Jaw (DJ)

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Hook & Grip (HG) Thumb & Fingerone point contact (TFX)

Double Hook (DH) Thumb & Fingerthree point contact (TF)

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Dinding Turap (sheetpile wall)

Secara garis besar turap dikelompokkan dalam jenis/tipe:

� Dinding turap kantilever (cantilever sheetpile wall): pada tanah

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sheetpile wall): pada tanah pasir(sand) dan lempung(clay)

� Dinding turap berangker (anchored sheetpile wall): pada tanah pasir(sand) dan lempung(clay)

Page 10: Sheet Pile (Dinding Turap) - widodosuyadi.lecture.ub.ac.idwidodosuyadi.lecture.ub.ac.id/files/2013/03/MINGGU-12-Sheet-Pile-1... · Sheet Pile (Dinding Turap) gudang SIVA 1 kapal sheet

CANTILEVER SHEETPILE

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CANTILEVER SHEETPILE

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Turap Kantilever(cantilever sheetpile)

� Diagram tekanan tanah pasir pada turap kantilever

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Tahap perencanaan (design steps)

� Tahap perhitungan dilakukan berdasar gambar diagram tekanan di atas

� Menghitung koefisien tekanan tanah aktif dan pasif

φφ sin145tan 2 −= −=K

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φφφ

φφφ

sin1

sin1

245tan

1

sin1

sin1

245tan

2

2

−+=

+=

=

+−=

−=

p

ap

a

K

KK

K

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Keseimbangan turap

� Jumlah gaya ke arah horisontal = 0

dimana P = luas diagram ACDE

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� Dari persamaan ini didapat L5

� Jumlah momen terhadap dasar turap = 0

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� Substitusikan pers 4, 7 & 9 ke pers 10

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Kedalaman pemancangan

� Dari perhitungan di atas dapat diketahui kedalaman teoritik dan aktual

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� Diagram tekanan yang sesungguhnya berdasarkan perhitungan dapat digambar

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Momen maksimum

� Momen maksimum terjadi pada gaya lintang = 0, yaitu di titik berjarak z’ dari E

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� Momen maksimum dapat dihitung sbb:

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Dimensi Turap

� Dimensi turap dapat ditentukan berdasarkan momen maksimum yang harus ditahan.

� Bila tegangan ijin material turap = σa, maka diperlukan modulus penampang (section modulus) = S

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modulus) = S

� Untuk turap baja dimensi dapat ditentukan berdasar tabel profil turap baja.

a

maksMS

σ=

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� Diagram tekanan tanah lempung (clay) pada turap kantilever

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Tahap perencanaan (design steps)

� Pada lempung undrained harga Ka=Kp=1� Tekanan tanah lateral di belakang dinding di

bawah dasar (dredge line)

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� Tekanan tanah lateral di depan dinding di bawah dasar (dredge line)

Page 21: Sheet Pile (Dinding Turap) - widodosuyadi.lecture.ub.ac.idwidodosuyadi.lecture.ub.ac.id/files/2013/03/MINGGU-12-Sheet-Pile-1... · Sheet Pile (Dinding Turap) gudang SIVA 1 kapal sheet

� Perhitungan tekanan σ1 dan σ2dilakukan sama dengan perhitungan turap kantilever pada tanah pasir

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Keseimbangan Turap

� Jumlah gaya ke arah horisontal = 0

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dimana P = luas diagram tekanan ACDE

� Dari persamaan di atas didapat

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� Jumlah momen terhadap dasar turap=0

� Substitusikan pers 4 ke pers 5

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� Hitung D:

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Momen maksimum dan dimensi turap

� Momen maksimum terjadi pada gaya lintang = 0, maka jarak dari dredge line didapat z’ = P/σ6

� Momen maksimum:

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� Dimensi turap dapat ditentukan bahwa modulus penampang yang diperlukan:

a

maksMS

σ=

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Tabel: modulus penampang & momen inertia

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Belajar

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Jangan tunggu sampai menit terakhir.

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Exams

My mama always said, “Exam is like a box of chocolates; you never know what you

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of chocolates; you never know what you are gonna get”

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