A dredging method often used in underwater operation of mechanical cutter suction dredger

The mechanical cutter suction dredger should be excavated in accordance with the principle of "near soil far adjustment, far soil near adjustment" before underwater operation in order to prevent leakage.The following information for you to introduce dredging methods, I hope to be helpful to you.

Dredger dredging using the transverse excavation method, that is, the left positioning pile as the main pile, as the transverse swing center, the use of the left and right cable alternate retraction, swing dredging.The forward moving track of the main pile is always kept on the center line of the excavation, so that the plane track of the reamers is always kept on the forward line of the design excavation line, so as to avoid the phenomenon of re-excavation and leakage excavation.

The dredging is divided into separate strips and layered excavation. The single standard width of the dredger is 28-26 meters, and the adjacent excavation points overlap not less than 2 meters, so as not to leak.According to the thickness of the dredged mud layers in each area, the thickness of each layer is about 0.4 meters, and the maximum is not more than 0.5 meters.Detailed construction records shall be made by technicians according to area number, construction time, construction teams and quality inspection, and marks shall be made on the plan.

The slope is to be constructed by the way of step excavation, and the principle of step design is as follows: the above is less than the below, and the above is less than the balance.The slope formed by natural collapse after excavation can meet the design requirements under the action of dead weight and dynamic water of slope step soil.The technical parameters of the excavation edge of each layer design are calculated and determined by the construction survey technician, and the dredger operator shall carry out the displacement of the dredger's working face according to the data provided by the dredger operator.With anchor boat, dredger anchoring by anchor boat completed;When the anchor boat and dredger are refueling, they are transported by tanker truck to the 60T oil barge, and then completed through the oil barge.