SCOPE OF SERVICES ( Diaphragm Wall)

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Detail Design & Drawings

 

Introduction

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1. Diaphragm wall is generally reinforced concrete wall constructed in the ground using under slurry technique which was developed in Europe

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2. The technique involves excavating a narrow trench that is kept full of an engineered fluid of slurry

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3. Walls of thickness between 300 and 1200 mm can be formed in this way up to a depths of 45 meters

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Diaphragm wall Application

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• Commonly used in congested areas

• Can be installed in close proximity to existing structure

• Practically suited for deep basements

• Used in conjunction with “Top Down” construction technique

• Positive facades of diaphragm wall

• Can be installed to considerable depth

• Formation of walls with substantial thickness

• Flexible system in plan layout

• Easily incorporated into permanent works

• Can carry vertical loads

• Construction time of basement can be lowered considerably

• Economic and positive solution for large deep basement in saturated and unstable soil profiles

• Can be used for seepage control in dams

• Noise levels limited to engine noise only

• No vibration during installation

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Construction Sequence of Diaphragm wall

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• Stage-1: Fixing of alignment

• Stage-2: Guide wall construction

• Stage-3: Trenching

• Stage-4: Trench cleaning

• Stage-5: Stop ends fixing

• Stage-6: Reinforcement cage lowering

• Stage-7: Placing of concrete

• Stage-8: Withdrawal of stop ends

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