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Sunday, January 3, 2021

HIRA for Concrete Pouring of Diaphragm Wall

HIRA for Concrete Pouring of Diaphragm Wall with the Help of 10 " Día Tremie Pipe

What is A diaphragm?

It is a methodology used to build reinforced concrete walls in the ground after deep trench excavation. The walls act as cut off the wall or serve as a structural member. Excavated trench creates a form for the wall. In this type of technique, the trench is brimmed with bentonite slurry (Bentonite slurry is a combination of sodium bentonite and slurry. For more details, a slurry is a thin sloppy mud or cement or, in extended use, any fluid mixture of a pulverized solid with water, often used as a convenient way of handling solids in bulk.) continuously circulated at all times.

Activity

Installation of the Tremie Pipe (TP-10") (10 " Día) up to the bottom of the under-construction excavated pit in which Reinforced Cage (RC) is previously fixed.

Hazards/Risk

  1. Improper Handling of materials or fall of material
  2. Improper securing of segments.   
  3. Fall of the person into the pit

Existing Control Measures

  1. All the segment of the tremie pipe should be properly handled.
  2. Proper care should be paid while securing all segments.
  3. Ensure all authorised person should wear a safety belt working near the excavated pit while pouring

Activity

Proper pouring of concrete on to the tremie pipe

Hazards/Risk

Improper handling of material / Fall of material

Existing Control Measures

  1. The trunk of the pumper should be properly fixed to avoid splash.
  2. The area should be well barricaded and unauthorized entry should be restricted to avoid injury

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HIRA for Concrete Pouring of Diaphragm Wall  

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