CONSTRUCTION OF FOUR DEEP AND LARGE DIAMETER BLIND SHAFT FOR THE PASSAGE OF VERTICAL GAS PIPELINES

3D METHOD STATEMENT FOR THE CONSTRUCTION OF A DEEP AND LARGE DIAMETER BLIND SHAFT FOR THE PASSAGE OF FOUR (3) GAS PIPELINES AND A VENTILATION SHAFT.

The video shows the method statement for the construction of large diameter shafts for the passage of gas pipelines, even though blind shafts are usually used in the mining industry. In this particular project pipelines were installed vertically and had a depth of 600 meters and were 2m in diameter.

A pendular rig with the usage of reverse circulation drilling and water as the drilling fluid were utilized to accomplish the excavation of the shafts. This is a totally mechanized process which eliminates the need of humans entering the shaft during its construction thus removing any safety hazard associated with this activity.

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