Answer to the allegation of "burial of a bridge by clerics" An informed person told "Insaf News" in response to Syed Muhammad Agamiri's allegation about the Fatah Square project: No one buried the project; The project from top to bottom was implemented. He, who wears clerical clothes and is also the head of the construction committee of the city council, does not understand the difference between the two. Top-down method or "top-down construction method" is a method of implementing an underground structure, a subway station, an underground parking lot and a building with several underground floors. In this method, unlike the conventional method in which excavations are completed first and then the building is built from the bottom up, the roof or upper slab is first built at the level, and then the excavation and construction of the lower floors continue gradually below it. Steps of implementing a top-down method.
1. Making perimeter walls and columns.
First, the retaining walls around the pit and the main columns or bearing piles are implemented.
2. Construction of the initial roof panel.
The board on the ground floor or the ceiling on the upper level is carried out. This board can simultaneously be used as a brace for the surrounding walls.
3. Digging under the board.
The soil is removed from the hole built in the roof and the excavation continues to the lower level.