What are the impacts of harsh construction environments on cutter suction dredgers?

The impact and measures of wind, waves, and obstacles in the river on the cutter and bearing box (referring to the solution to the problem)

The cutter suction dredger operates in a construction environment with strong winds and waves It is easy to cause continuous turbulence on the ship. When the cutter is in hard soil conditions, the hydraulic pressure of the cutter is extremely unstable, and it may even cause the cutter to stall. The cutter head is subjected to unbalanced force due to impact, which not only damages the cutter teeth and back, but also may cause the right angle fixing bolts (composed of head and screw) of the cutter bearing box floating seal ring assembly to break, resulting in the O-ring of the floating seal ring being squeezed and broken. Construction team response measures (referring to solutions to problems): 1. Stop construction if necessary. 2. Install anti wave hydraulic compensators on the bridge. 3. Control the depth of dredging. 4. Program for installing anti blocking hydraulic system.

Due to the different construction environments faced by dredgers, some soils are softer and some soils are harder, and harsh soils can also have a significant impact on the mud pump. The same soil type causes different amounts of wear on the mud pump (a basic type of component failure), and the amount of wear on the mud pump is proportional to the specific gravity of sediment particles and related to the hardness of the soil. The inner wall channel of the mud pump casing is impacted and washed by the sand and gravel flow thrown out by the impeller (referring to the disc with moving blades). There are two ways of wear, one is abrasive

The harsh soil conditions of erosion wear and stress wear caused by impact seriously affect the service life of the mud pump. Measures taken by the construction team (referring to solutions to problems):

Wear resistant welding and grid welding are used to increase the service life of the mud pump; 2. Adopting high chromium cast iron mud pump.

The construction environment faced by each dredger construction team is very different, and some harsh environments can affect the hull and cutterhead of the dredger, affecting its service life  

So we need to have a clear understanding of the construction environment before starting construction To ensure the normal use of the dredger Without damaging the dredging equipment.