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Diaphragm wall

Introduction

  • Diaphragm Wall is generally reinforced concrete wall constructed in the ground using Under slurry technique which was developed in Europe.
  • The technique involves excavating a narrow trench that is kept full of an engineered fluid of slurry.
  • Walls of thickness between 300 and 1200 mm can be formed in this way up to a depths of 45 meters.

Diaphragm wall Application

  • 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.
  • Designable to 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.

Construction Sequence of Diaphragm wall

  • 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