New equipment for high-speed bridge reinforced concrete demolition characteristics of remote-controlled hydraulic splitte

  New equipment for high-speed bridge reinforced concrete demolition characteristics of remote-controlled hydraulic splitter
In the process of bridge deck cement concrete breaking, while doing a good job in the preliminary work, according to the thickness of bridge deck cement concrete, the thickness of reinforcement and the density of reinforcement mesh, a total of four bridge deck breaking construction processes have been used
The following is a brief introduction for comparison, learning and reference

1、 Do a good job in safety protection
There are four main precautions: first, do a good job in the safety protection under the bridge and on the side of the bridge where pedestrians and vehicles may appear under the bridge (except for the passage), mainly using protective nets, or double-layer protective nets, or protective nets plus colored strip cloth
Second, for the interchange roads and passages with dense pedestrians and vehicles, rigid protection shall be done, mainly using supports
The third is to fill the gap of the bridge deck (including expansion joints, drainage holes and other hole sides)
Fourth, during construction, there should be safety officers on and under the bridge to be responsible for safety on site

2、 Find the interface and determine the construction process
The pavement thickness of high-speed bridges varies greatly
Before construction at multiple construction points, a 30-50cm groove shall be dug with a hand-held air pick to find the interface between bridge deck pavement and slab and beam, and then the chiseling depth of local areas shall be determined according to the thickness of the interface

3、 Four construction techniques for bridge deck breaking
1
Common air pick breaking method
For the plain concrete bridge deck with a thickness of less than 10cm, it is advisable to use an air pick to chisel out small pieces directly (about 20cm * 20cm), but do not chisel them into pieces, so as not to affect the efficiency

For the reinforced mesh concrete bridge deck with a thickness of less than 10cm, the air pick is also used to chisel it directly until the reinforcement is cleared

2
Concrete splitting machine breaking method
For the plain concrete bridge deck with a thickness greater than 10cm, the air gun shall be used for drilling first (note that the hole depth is consistent with the concrete thickness), and the drilling spacing is 30cm * 40 ~ 50cm (row spacing * column spacing); Then, the hydraulic concrete splitter is used to break it into 30cm * 40 ~ 50cm blocks*-* After that, move it manually with crowbar
At the same time, the slag must be cleaned up when it is cleaned
When it is close to the anti-collision wall, it should be split in the groove direction, and the row rejection and column spacing of the hole should be reduced to 20cm

For the reinforced mesh concrete bridge deck with a thickness greater than 10cm, the concrete splitting machine breaking method can also be used, but the drilling spacing should be reduced to 20cm * 20cm
When drilling, it should be slightly inclined to the free surface
At the same time, find the free end of the reinforcement, flexibly determine the hole layout position according to the end reinforcement, and the assistance of air pick is also required during slag removal

3
Artificial splitting method
For the reinforced mesh concrete bridge deck with a thickness greater than 10cm, if the concrete splitting method is not used, the manual splitting method can also be used, and the principle is similar to the concrete splitting method
The drilling spacing is about 20cm * 20cm
Drill holes in rows according to the breaking interface (also pay attention to the influence of reinforcement mesh on the drilling), and then use wedge-shaped cleaver and hammer to split manually, and cooperate with air pick to clean up the slag

4
Air pick combined cutting method
For the thin reinforced concrete bridge deck with thickness less than 12cm, the air pick combined with cutting method should be adopted
Firstly, use the cutting machine to cut the concrete into 50cm * 100cm squares (100cm is the driving direction, and the cutting area can also be reduced according to the situation); Then use a hand-held air pick to drive horizontally 1 ~ 2cm above the interface between the pavement and the slab and beam to make the pavement and
The interface between plate and beam is separated* Then pry up the cement board with a crowbar, cut off the reinforcement and then * leave
Dongguan farun Machinery Co
, Ltd