DINDING PENAHAN TANAH

DINDING PENAHAN TANAH

JENIS –JENIS DINDING PENAHAN TANAH

2

DESAIN OF GRAVITY AND SEMIGRAVITY WALLS

3 Sumber : Bowles, Joseph E, Foundation analysis and design







DESIGN OF CANTILEVER RETAINING WALL










DRAINAGE WALL

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Sertifikasi HATTI: Tegangan Lateral dan Dinding Penahan Tanah

Prof. Ir. Masyhur Irsyam, MSE., Ph.D.

Teknik Sipil, Institut Teknologi Bandung

Sheet Pile

(Retaining wall Gabion)

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Braced Cut Excavation

CONTOH STRUKTUR SHEET PILE

Contoh PelaksanaanDiapraghmWall Pembuatan Guide Wall

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Clamshell Grabber

Clamshell Grabber

CWS (Cofrage Avec Waterstopper)

Rebar cage + anchor sleeve

Stopper baja untuk mencetak bentuk ujung kiri-kanan panel

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Rebar cage + anchor sleeve

Rebar Lifting

Rebar Lifting Rebar Lifting

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GEDUNG PERKANTORAN

Concreting

JAKARTA

Ground Anchor

Davy Sukamta

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Ground Anchor

GEDUNG KANTOR PLUIT SELATAN RAYA - JAKARTA

Rekomendasi Buku Untuk Sheet Pile

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s1

Mekanisme Aktif dan Passif

Test Triaxial: Arah Bidang Runtuh Terhadap s1 s3

s3

s1

s1

y=45-f/2

s3

q=45+f/2

s3

s1

Mekanisme Aktif dan Passif Mekanisme Aktif dan Passif s1

sv=s1

sh=s3

s1

sh=s1

s1

sh=s1

sv=s3

s3

sv=s3

s3

s3

s3

s1

sh=s3

sv=s1

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Besarnya Tegangan Aktif

Hubungan Koefisien Lateral dan Regangan

s1

t

Pasir t

t

Kp

f

f

f

s3=sh s3=sh

s1=sv

s

s3

s3

s3 s

s1=sv s1

s1

sa=s3=sh=Ka. sv

Ko

s3

Ka

Ka =tan245f /2

Compression

Expansion

Ka =

Lateral Strain

s3 s1

Besarnya Tegangan Pasif

Tekanan Aktif: Pasir

t

s3

f s1

s1

sh=s3=s1x Ka Lebih dari satu lapis :

s3

s1

s

s1

sh=s3=s1x Ka

s3

sp=s1=sh=Kp. sv Kp =

s1 = s3

1 =

Ka

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Tekanan Aktif dan Pasif: Pasir

Tekanan Aktif dan Pasif: Pasir

Ada Beban Merata

p

s

s

p gh

q

gh q

p g h Kp

g h Ka

gh

qKp g h Kp

g h Ka pKa

gh

sh = g h +q) Kp sh = g h +p) Ka Depth

Depth

Depth

Depth

Tegangan Effektif

Pengaruh Beban dan Air Tanah

a

h h2

g’ = g - gw

s = g.h

h1

s= gh1 + g’h2 = g (h1+ h2) - gw.h2

a a

s = s -  s‘= tegangan efektif s = tegangan total

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Cantilever & Gravity Wall Pengaruh kemiringan tanah diatas:

Cantilever

Gravity Wall

Penaruh C-Kohesi Tanah Tekanan Aktif Rankine Shear

Pasir

stress

s3 =s.Ka =svKa 2c Ka

C

Normal

Lempung stress

(b)

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Tekanan Pasif Rankine Tekanan Aktif Rankine untuk Perencanaan

s1 =sv .Kp =svKp +2c Kp

(c)

Beban pada dinding

Beban pada dinding

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Disain Dinding Penahan Tanah:

Stabilitas Retaining Wall 1. Overtuning 2. Sliding

Stabilitas

3. Excentricity

4. Bearing Capacity

1. Overturning

SF = 1.5 – 2.0

1. Overtuning

4. Bearing Capacity

2. Sliding

5. Over All Stability

3. Excentricity

MR MR

•

•

2. Sliding

3.

•

Overtuning

a

Pa Pv Ph

Excentricity

a

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•

Overtuning

t

x

x

x

f

x x

c

s s = c + s’ tan f

Where s’ = effective normal stress on plane of shearing c = cohesion, or apparent cohesion

f = angle of friction •

Sliding

•

Sliding

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1.

Contoh Soal

1.

Solusi :

Berikut ini gambar cross section dari cantilever retaining wall. Hitung angka keamanan (factor of safety) yang menyangkut overtuning dan sliding!!!

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1.

Contoh Soal Berikut ini gambar cross section dari cantilever retaining wall. Hitung angka keamanan (factor of safety) yang menyangkut overtuning dan sliding!!!

Sheet Pile

Cantilever Pile/ Sheet Pile

KLASIFIKASI STRUKTUR SHEET PILE

Steel Pipe Pile - Japan

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Anchored Type

Tie Rod Type

Anchored Type

Structure

Deadman Type Structure

Double Tie Rod Type Structure

Tie Rod Type-I

Tie Rod Type-II




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Tie Rod Type-III

Anchored Sheet Pile


Sheet pile

Piling Handbook - Arcelor

Batter-Pile Anchor Type

Ground anchor

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Dermaga Tanjung Emas +3.60 mLWS 0.00 mLWS f g

-10.0 mLWS Very Soft Existing SeaClay Bed

Eu = 250 Cu

C

f

g

C 29.4 1o 16.0

Sand Very Soft Clay

1.0 124 16.5 31.9 o o16.0

Very Soft Clay

25.4 1o 15.5

Soft Clay

41.9 1o 16.0

Soft Clay

43.4 2o 16.5

Stiff Clay

65.0 4o 17.0

80.0 4o 17.5 Stiff Clay

Relieving Platforms Retaining Wall Relieving Platform Type Structure


Piling Handbook - British

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Double Sheet Pile Wall Type Structure

Double Sheet Pile Wall Type


Cofferdams

Cellular Type Structure



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Metoda Perhitungan Sheet Pile

Cofferdams

1. Metoda Elemen Hingga Anchor: Pegas Parameter Tanah: C (kohesi) f (Sudut geser dalam) E (Young’s modulus) Sheet Pile: Beam Element

u (Poisson’s ratio)

M < M konvensional Piling Handbook - Arcelor

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3. Metoda Konvensional 2. Beam on Elastic Foundation O Anchor: Pegas

Anchor

Tekanan Tanah Aktif dan Pasif

Tekanan aktif

Tahanan pasif tanah: Pegas

Keseimbangan Gaya Horizontal dan Momen di Titik O

Cantilever Pile/ Sheet Pile Cantilever Pile/ Sheet Pile

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Cantilever Pile/ Sheet Pile

Tegangan Lateral Pada Cantilever Pile/ Sheet Pile

s3

s3

s3

s1

s1

s1

s1

s3

Aktif

Pasif

Cantilever Sheet Pile

O aktif

pasif

C S Mc = 0 D OD = 1.20 OC

Mmax pada zero shear

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Metoda Konvensional: 1. Free Earth Support

o

Metoda Konvensional:

Tegangan Lateral Anchored Sheet Pile

1. Free Earth Support

o s1

s3

s1 s3

s1

s1

s3

s3

Aktif

Pasif

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Metoda Konvensional: 1. Free Earth Support

1. Free Earth Support

O O aktif aktif

pasif

pasif

Panjang teoritis d: Keseimbangan momen di titik O Gaya angkur : Keseimbangan gaya horizontal

Untuk Disain Panjang d : SF momen di titik O = 2.0

Piling Handbook -British

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Metoda Konvensional: 2. Fixed Earth Support

o



2. Fixed Earth Support


s3

s1

s1

s3

s3

s1

Aktif

s3

Pasif

Pasif

s1

Aktif

s1

s1

s3

s3

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Metoda Konvensional: 2. Fixed Earth Support

Pasif

Aktif

Aktif Pasif


Retaining Walls


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CONTOH STRUKTUR SHEET PILE Retaining Walls

Braced Cut Excavation

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Multi-Strut Type

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PINTU GESER 2

BORED PILE DENGAN DISKONTINUITAS DARI HASIL PENGUJIAN

PINTU GESER 1

TT

BM.1

TT

TL TL

TL

TL

TL

TL

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Sand

Clay Soft to Medium gH

>4

Stiff gH

<4

C C

Thank You!

gH

31

DINDING PENAHAN TANAH

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