High

Specifications

High quality,Help marine caisson to go into the sea, better, safeter,cheaper than steel wheels.

Application of New Technology
Construction preparation
Clean up conserve hydrocele and concrete and etc. in the caisson. Install two winches of 5T and a

guide ring in both sides of the caisson back, and carry out an operational test. Understand the use

performance of air bag, and inflatable operating procedures of air bags; Conduct empty loading

inflatable inspection on loading air bag, and the pressure reaches 0.175 MPa. Flatten and clear the

road forward, pay attention to clearing embedded pieces of iron and stone, to prevent air bag being

punctured. Mark air bag position on the caisson. Check conditions of air compressor equipment.
Constructive methods
Place 4 screw jacks of 600t respectively in the screw jack pit (place respectively on each screw jack

a piece of 0.6 x 0.6m steel plate), facing the center of caisson; Fuel and pressure screw jack, and

lift the caisson for 220 mm.
According to preestablished "location map", stuff mat wood to the bottom of the caisson; Place the

mat wood even with the caisson; The mat wood is 320 mm wide, 220mm high, and 2.5m long.
Lift 5 air bags with tower crane; artificially penetrate a rope in the bottom of the caisson. The air

bag location should be consistent with the location of identification. Place 5 air bags at the caisson

bottom and 2 reserve air bags in outer fore-toe.
Air bag aeration
Firstly install valves and barometer at both ends of the air bag, gradually inflate 5 air bags at the

bottom of the caisson, inflate air pressure to 0.08 MPa, and the inflation order is from air bags of

fore and hind toe to caisson bottom. Secondly inflate pressure to 0.122 MPa (or withdraw until the

mat wood can move). Check the tilting condition of caisson when inflating, and the order is the

same as above. Finally withdraw the mat wood.
Caisson forward
Tie up caisson with rope, and move it forward for about 1.5 meters with slow traction from the back

of winch, and through guide ring located in the middle of wharf. Then stuff reserve air bag, and

inflate pressure to 0.122 MPa. Reactivate the winch to tract caisson for horizontal movement of 1.5

meters, and stuff reserve air bag 2, and inflate pressure to 0.122 MPa. Repeat the operation above until the caisson moves forward within operational diameter of 1000T crane barge.
Effect received
New technology air bag handling caisson of the wharf project took a total of 10 days, and 18

caisson handling tasks are successfully completed with eight days ahead of schedule. Analysis

based on the constructive condition: New technology air bag handling caisson is safe and feasible,

for it has broken the traditional mode of construction; especially it has a certain sense on outgo

construction with no fixed wharf and prefabrication.

-quality ship launching airbag MLG-T Model