Energy-dissipating gravity anchor automatic falling floating foundation elevated arresting ship facility

Abstract

A floating foundation overhead ship arresting facility with reliable dragging energy dissipation is composed of floating foundations, supporting frames, an arresting net, an anchorage system, a sinker trigger mechanism and the like. Main gravity anchors for dragging energy dissipation are hung below the floating foundations, main anchor chains are restrained through the sinker trigger mechanism, the main gravity anchors are made to leave a silt surface in a high water level state, and therefore the phenomenon that the main gravity anchors sink into silt and cannot be dragged can be prevented. When a ship collides with the arresting net, the main anchor chains are not restrained, the main gravity anchors can be dragged for energy dissipation, and eventually the ship is prevented from moving towards a bridge location. Even though part of the arresting net acts on a bow, the transversely-rotating angle of the arrested ship and motion after transverse rotating of the ship is blocked are limited through the multiple floating foundations together, and arresting failures caused when the arrested ship transversely rotates can not occur. The floating foundations are used for supporting the arresting net, and the floating foundation overhead ship blocking facility can well adapt to variation of the water level, and be used in an abyssal region and used for transition and any extension. The floating foundations deviate under direct collision of the ship, and therefore the arresting facility cannot break down.

Description

technical field [0001] The invention relates to an arresting ship facility for protecting a bridge section of a non-navigable hole, in particular to an arresting ship facility for a floating foundation elevated bridge section. Background technique [0002] At present, known bridge anti-ship collision facilities mainly contain two types. [0003] One type is installed on the pier, which uses the deformation of the anti-collision system to absorb the kinetic energy of the ship and prolong the impact time, thereby reducing the impact force of the ship. This type of anti-collision system is technically complex, and the construction and installation costs are relatively high. For bridge sections with non-navigation holes, the net height under the bridge is usually limited, and it is necessary to protect both the pier and the superstructure at the same time, and it is difficult for such facilities to play a role. [0004] The other type is set at a certain distance from the ship...

AI Technical Summary

Problems solved by technology

For the elevated fixed and mixed types, the pile caps usually do not have the ability to withstand the direct impact of large ships, and if they are directly impacted, it may lead to arresting failure

For the mooring type and mixed type, the ship will turn sideways during the arresting process, and the transverse flow force on the ship after turning sideways is much greater than the longitudinal flow force on the ship, if it is balanced by increasing the reaction force of the arresting facility The lateral flow force on the ship will also lead to high construction and installation costs for the arresting ship facilities

For arresting ship facilities that use the anchor resistance of the gravity anchor to do negative work to consume the kinetic energy of the ship, if the gravity anchor is placed directly on the mud surface, there will be a risk that the gravity anchor will be buried in the sand and cannot move the anchor

Images