Grouting connection node for deepwater floating type platform steel structures

Abstract

The invention relates to a grouting connection node for deepwater floating type platform steel structures. The connection node comprises an external upright and an internal upright; a central channel is arranged in the external upright along the axis direction; one section of the top of the internal upright extends into the central channel in the external upright; an annular space is formed between the outer wall surface of the top of the internal upright and the inner wall surface of the central channel; a grouting material is arranged in the annular space; the top of the internal upright is fixedly connected with the external upright through an upper-layer fixing device; the bottom of the external upright is fixedly connected with the internal upright through a lower-layer fixing device; at the bottom of the annular space, a main grouting valve and an auxiliary grouting valve are arranged on the inner wall surface of the central channel sequentially from bottom to top; at the top of the annular space, a backflow valve is arranged on the inner wall surface of the central channel; the main grouting valve is connected with a main grouting system; the auxiliary grouting valve is connected with an auxiliary grouting system; and the main grouting system and the auxiliary grouting system are both connected with the backflow valve. The grouting connection node provided by the invention can be widely applied to the connection of the steel structures in deepwater environment.

Description

technical field [0001] The invention relates to a connection node of a floating platform, in particular to a grouting connection node used for steel structures of a deep-water floating platform. Background technique [0002] With the continuous expansion of the scale of human development of offshore oil and gas, the development of offshore oil and gas exploration and development from shallow sea to deep sea has become an inevitable trend. As the main device for deepwater oil and gas development, floating platforms often require permanent connections between steel structures offshore. At present, the offshore steel structure connection of the floating platform usually adopts two methods of mechanical connection or welding. Among them, although the structural reliability of the mechanical connection is high, the cost is generally high; welding requires a long offshore operation time and requires a high climate window. Once encountering severe weather conditions, the welding q...

AI Technical Summary

Problems solved by technology

Compared with shallow-water fixed platforms, deep-water marine environmental conditions are harsher, floating platforms are in a state of motion under the action of wind, waves and currents, and there are greater difficulties and challenges in the grouting connection process and methods

At the same time, in the application of shallow water fixed platform, the steel structure connected by grouting is relatively small (such as the connection between the pile foundation of the jacket platform and the jacket leg), and the buckling of the structure itself can be satisfied by increasing the thickness of the steel structure. In the floating platform, it is often necessary to connect large-scale structures, and it is difficult to meet the buckling requirements only by increasing the thickness of the structure

Therefore, the existing grouting connection technology and design of the shallow water fixed platform cannot be applied to the deep water floating platform

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