Beijing demolition company with the demolition of reinforcement engineering reinforcement also increased as like bamboo shoots after a spring rain appeared in front of people, today we have with the Beijing hydraulic clamp demolition company professionals take a detailed look at how the hydraulic clamp demolition construction.
First, the applicability of:
The method is applicable to the static free vibration removal of the original structural members.
Two, construction method:
1, floor removal: first in the floor outside the edge (the length of the steel lap joint length) water drilling, with the pressure clamp into the hole to be broken. Then to the need to retain the reinforced direction until the end plate (due to the limitation of technology, the other direction can only cut off the use of steel reinforced, removal of welding and pincers, the same below). To open up a wide belt around the 300mm, to the other direction of the layers of broken, need to retain the steel to set aside 1500mm lap length.
2, beam removed:
A, the width of less than 300mm: direct pressure clamp removal. The non cantilever beam by beam on the surface to the lower surface of the layers of broken bars shall be reserved, cut down the middle, reinforced all resection; does not retain the steel cantilever beam by the cantilever end to support the demolition, reinforced all of the cantilever beam; reinforced the demolition retained by the cantilever end, first started to avoid open bars, the level of empty package clamp concrete, concrete and reinforced the lower pressure clamp clamp can avoid cracking gently, and reinforcement, stirrups cut off at any time.
B, section width >300mm: before the demolition according to the beam reinforcement in the beam side to avoid the position of steel bars to play a row spacing of 250mm horizontal water drilling, hole depth of 200 ~ 300mm. When the beam under only one row of iron bars, playing with 159 single hole, two with about 108 sets of holes play with two rows of steel bars. Retain the steel cantilever beam, with pressure clamp inserted into the adjacent hole is broken, Liang Kuan will decrease, and then pick the end level from suspension clamp, reinforced concrete will avoid hollowed out, wrapped with concrete reinforced the lower pressure clamp gently clip can crack, try to avoid hurting the main reinforcement. Do not retain the cantilever beam, the cantilever end to the left side can be removed.
C, steel retaining: the need to meet the new beam position, when the original structure beam length is greater than 2m, retaining the length of the 2m reinforcement; when the length of the original beam is less than 2m, can be cut off from the end of the hook. Removal process, in order to facilitate the next clamp, beam main reinforcement can be properly bent, bending angle shall not be greater than 45 degrees. Due to the construction process of the pressure clamp, some steel bars may be slightly bent during the dismantling process. When the beam main reinforcement for double row, double row finally minced wrapped reinforced concrete, because concrete layer is thick, as part of the main reinforcement concrete crack clip will be bent, when the beam main reinforcement for single row, reinforced ratio can reach more than 95% well preserved.
Demolition of 3 columns, columns: less than 300 x 300, can be directly used to clamp pressure from top to bottom is broken, all of the bar.
