Piling barge

Abstract

A piling barge is disclosed by the present invention. In the piling barge disclosed, a supporting leg includes a supporting arm extended in vertical direction. Differing from the prior art, the supporting leg further includes a supporting base. The supporting base has a transverse section larger than that of the supporting arm, an end of the supporting arm is fixed with the upper surface of the supporting base. The supporting base of the supporting leg having a larger transverse section may receive support from a larger area of mollisol ground and thus provide a larger supporting force for the hull, which enables the piling barge to perform the piling operation on sea areas with mollisol ground. A piling device of the piling barge has pile frame adjusting mechanisms, such as a luffing oil cylinder, a luffing winch mechanism and a turntable, etc., which may adjust the incline angle and the position of the pile frame, therefore the working efficiency of piling operation of the piling barge can be improved.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to Chinese Patent Application No. 200910237986.3, filed Nov. 27, 2009, entitled “A Piling Vessel”, which is incorporated by reference herein for all purposes.FIELD OF THE INVENTION[0002]The present invention relates to offshore engineering technology, and in particular, to a piling barge used for offshore piling.THE RELATED ART[0003]Currently, in the exploitation of marine resources, it is necessary to build some functions in a tidal flat (including transfer areas of water and land, such as inland rivers, inland lakes, and marshes) or a neritic zone. For example, wind farms are built in predetermined sea areas to make full use of offshore wind energy. Based on characteristics of offshore engineering operations, particular attention should be paid on basic construction in offshore engineering, so as to provide foundations for subsequent constructions. During the basic construction in a predetermined sea are...

AI Technical Summary

Benefits of technology

The present invention provides a piling barge that can perform piling on mollisol ground. The piling barge has a high piling efficiency and includes a supporting arm and a supporting base with a larger transverse section than the supporting arm. The supporting base can be sunk into sea water smoothly to support the piling operation on mollisol ground. The piling barge also has a charging and discharging pump and a luffing oil cylinder to facilitate the piling operation. The technical effects of the invention include increased stability of the piling barge and reduced weight of the supporting arm.

Problems solved by technology

The existing piling barge presents the following disadvantages:

1. It is difficult for the piling barge to perform piling for sea areas with mollisol ground at the seabed. The seabed ground of a tidal flat or a neritic zone usually has silt layers, which form mollisol ground. Reference is made to FIG. 1, which is a schematic diagram of the load bearing of a supporting leg of the existing piling barge when being supported on the seabed ground. If the ground of the operating sea area is a mollisol ground, the supporting leg 200 will be trapped into the mollisol ground 300, which in turn generates two force acting on the lower end of the supporting leg 200, i.e., a supporting force F1 to a bottom surface of the supporting leg 200, and a friction force F2 to side surfaces of the supporting leg 200, the resultant force of these two forces being the supporting force that could be provided to the hull 100 by the supporting leg 200. Due to the fact that the mollisol ground has fluidity, ground grains at the bottom surface of the supporting leg 200 will flow to the periphery when receiving force from the supporting leg 200. At this point, the mollisol ground 300 fails to generate a large force to act on the bottom surface of the supporting leg 200, which results a smaller supporting force F1; and for the same reason, the friction force F2 is also severely limited by the fluidity of the mollisol ground 300. As a result, when the operating sea area is a mollisol ground 300, it is difficult for the supporting leg 200 to provide a large supporting force to the hull 100, and thus the piling device on the piling barge could not operate stably, and it would be difficult to implement the piling operation on sea areas with mollisol ground. Moreover, when the supporting leg 200 is to be extracted from the mollisol ground 300, the friction force F2 would be applied to the supporting leg 200 in an opposite direction to make it difficult to extract the supporting leg 200 from the mollisol ground 300, resulting in difficulty in relocating of the piling barge.

However, they both are impractical, because this may not only bring about increase in the overall size and thus the manufacturing and using costs of the piling barge, but also make it difficult to extract the supporting leg 200 out of the mollisol ground 300 and thus make it impossible to relocate the piling barge due to a large friction force F2.

2. Low working efficiency.

In the pile-turning or pile-sinking of the existing piling barge, the positioning is usually made by way of windlassing, which leads to long positioning period and reduced operating efficiency of the piling barge.

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