Presentation fyp 1

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Slope Mitigation Measure for Sekolah Menengah Kebangsaan Sultan Haji Ahmad Shah, Tanah Rata, Cameron Highland. Nuril Shahzira binti Roslan 2013813994 Supervisor: Dr Ismachayadi

Transcript of Presentation fyp 1

Page 1: Presentation fyp 1

Slope Mitigation Mea-sure for

Sekolah Menengah Ke-bangsaan Sultan Haji Ahmad Shah, Tanah Rata, Cameron High-

land.Nuril Shahzira binti Roslan

2013813994Supervisor: Dr Ismachayadi

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PRESENTATION OUT-LINES

• Introduction• Theoretical Background • Slope stability analysis• Proposed mitigation

method• Gap of research• Methodology• Preliminary Result• Conclusion

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INTRODUCTION Slope stability is the most important is-

sues in geotechnical engineering.

Malaysia is one of the tropical countries that

receive daily rainfall throughout the year and this condition can cause so many slope failures due to the heavy rainfall at hillsides area.

Based on this condition, make a re-search to

proposed mitigation measure to re-duce the slope failure.

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Problem State-ment

The shear strength parameter must be considered to analyze the behavior of soils in slope stability.

The slope failure mostly caused by rapid change in rainfall influence the infiltration depth.

The existing structure scientifically does not give any improvement in slope stabilization.

Proposed the retaining structure to protect against

slope failure

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Objective

a) To analyses the design and stability of the slope in three mitigation measure.

b) To access design and analyze the stability of the proposed slope mitigation measures and retaining structures.

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Significant Study

This study will enhance the understanding the actual concept of slope failure at site.

This study help us to understand further about soil behavior through the laboratory test and in situ test

The importance of this study is to understand the effect moisture content of soil to the slope

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Theoretical Back-ground

SiteTanah Rata,

Cameron Highland

Geological Formation : Geological map it shows

that was felsic to intermediate intrusive.

This intrusive shows that formation of igneous rock in

Cameron Highland site.

Strength Parameter: saturated unit weight

effective cohesioneffective friction angle

Infiltration depth: Infiltration is a process

movement of water into a soil profile.

Soil characteristic influence the infiltration depth into the soil layerThe infiltration rate is

influenced by rainfall intensity at the area.

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Slope Stability Analysisordinary method

Simplified Bishop Method

Janbu Method

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Proposed Mitigation Measure

Tieback Wall

Sheet Pile Wall Crib Wall

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Gap of Research

Author Title Finding GapMohd Azri Mohd

Zin

(2012)

Slope stability study at

UITM Puncak Alam

Analyze FOS for existing

slope using PLAXIS

program.

Analyze FOS for existing

slope using GEO Studio

2007 (SLOPE/W)

Yingfa Lu

(2014)

Deformation and

failure mechanism of

slope in three

dimensions

Analyze two failure

modes which are for the

thrust- type landslide

and pull-type landslide.

Analyze two failure

mode which are slope

based on the soil profile

and slope effect due to

the infiltration depth

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Gap of Research

K.Y. Choi, Raymond

W.M Cheung

(2013)

Landslide disaster

prevention and

mitigation through

work in Hong Kong

Proposed soil nailing as

mitigation measure for

slope stability

Proposed 3 mitigation

measure for slope

stability which is tieback

wall, sheet pile wall, and

crib wall

Hamed Niroumand

(2012)

Slope Stability and

Sheet Pile and

Contiguous Bored Pile

Walls

Method slope stability

analysis used was

Simplified Bishop

method, Janbu method,

Morgenstem & price and

Sarma.

Method slope stability

analysis used was

Simplified Bishop

method, Janbu method

and Ordinary method.

Author Title Finding Gap

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Methodology

Problem Statement

Define Objective

Slope stability analysis using SLOPE/W

Verify and solve problem

Compare Factor of Safety

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Slope Cross Sec-tion

Cross Section of Slope Based on Goggle Earth.

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Soil Profile

Soil Profile

Soil Profile

silty SAND

silty SAND

sandy SILT

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Slope Cross Sec-tion

Cross Section Soil

Profile

medium sandy SILTstiff sandy SILTloose silty SANDmedium dense silty SANDdense silty SANDvery dense silty SAND

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Preliminary Result110100908070605040302010

0 50 100 150 200 250 300 350

Without infiltration depth

Ordinary method

Bishop method

Janbu method

0.895

1.239

1.119

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Preliminary Result

0 50 100 150 200 250 300 350

110100908070605040302010

With infiltration depth Depth

1m

Ordinary method

Bishop method

Janbu method

0.945

1.244

1.126

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Preliminary Result

0 50 100 150 200 250 300 350

110100908070605040302010

With infiltration depth Depth

2m

Ordinary

method

Bishop method

Janbu method

0.94

0

1.22

3

1.10

6

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Preliminary Result110100908070605040302010

With infiltration depth Depth

3m

0 50 100 150 200 250 300 350

Ordinary

method

Bishop method

Janbu method

0.926

1.236

1.116

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ConclusionThe slope was evaluated and the infiltration depth was considered in the SLOPE/W and the factor of safety was determined from the solve analysis in the software.

The infiltration depth influenced the value of FOS where the slope expected to fail.

Hence the mitigation measure was proposed to stabilize the slope.