7/28/2019 Design of Sheet Pile Bracing

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Contents

1. Design Criteria:.................................................................................................................................. 2

1.1. Soil ............................................................................................................................................... 2

1.2. Materials Specification:............................................................................................................. 2

1.3. Loading ....................................................................................................................................... 2

1.3.1. Lateral Earth Pressure Calculation : ................................................................................... 3

2. Bracing system ................................................................................................................................... 4

3. Structural Design:.............................................................................................................................. 5

3.1. Input Data : ................................................................................................................................ 6

3.1.1. Materil..................................................................................................................................... 6

3.1.2. Steel Section properties ......................................................................................................... 7

3.1.3. Pressure on sheets ................................................................................................................. 8

3.2. Output Data................................................................................................................................ 9

3.2.1. Straining actions on Waler beams ........................................................................................ 9

3.2.2. Straining actions on Sheet pile............................................................................................ 11

4. Design of sections: ........................................................................................................................ 12

4.1. Stress/Capacity Ratio: ............................................................................................................. 12

4.2. Design of Waler Beam ............................................................................................................. 13

4.3. Design of Strut.......................................................................................................................... 17

4.4. Design of braces ....................................................................................................................... 19

4.5. Design of Vertical column ....................................................................................................... 23

5. Refrences: ..................................................................................................................................... 24

USS Sheet piling design manual ......................................................................................................... 24

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1. Design Criteria:1.1. Soil

Type of soil: Dense soil

Soil condition: Saturated

= 21 Kn/m3

Angle of Soil friction = 30 degree

Angle of Wall friction ( ) = 10 degree

Ka = 0.33

Kp = 3

(Friction) = 2/3 Tan = 0.38

Height of Excavation = 5 m

1.2. Materials Specification:1.2.1. Steel

Yeild strength = 340 N/mm2 Tensile strength = 480 N/mm2 Steel Es = 200 KN/mm2

1.3. Loading Lateral earth pressure Dead Load

As per Steel Data sheet

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1.3.1. Lateral Earth Pressure Calculation :(Using TERZAGI Method to calculate lateral earth pressure at BRACED CUT Case )

(Dense Soil)

*Refrence attached ( page 24 )

Pb = 0.8 * * K * h * Cos

= 0.8 * 21 * 0.33 * 5.7 * Cos

= 28 Kn/m2

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2. Bracing system

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3. Structural Design:Finite element Structural model has been created using SAP2000 V 15 Software to Calculate

straining actions effecting on bracing system

Analytical Model :

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3.1. Input Data :

3.1.1. Materil

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3.1.2. Steel Section properties

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3.1.3. Pressure on sheets

Wall 1

Wall 2

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3.2. Output Data3.2.1. Straining actions on Waler beams

BMD

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NFD

SFD

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3.2.2. Straining actions on Sheet pile

Vertical Direction Only

M22

M22

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4. Design of sections:

4.1.Stress/Capacity Ratio:

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4.2.

Design of Waler Beam

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4.3. Design of Strut

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4.4. Design of braces

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4.5. Design of Vertical column

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5. Refrences:USS Sheet piling design manual