Reinforced grouting seal ring structure for offshore wind power pile foundation by first piling method

Abstract

The invention discloses a reinforced grouting seal ring structure for an offshore wind power pile foundation by a first piling method, and belongs to the technical field of offshore wind power engineering. The structure is arranged between grouting holes and the bottom end of a pile leg. The seal ring structure comprises a seal ring annular part and a seal ring cone part; a seal ring inner circleacts on the outer surface of the pile leg, and a seal ring outer circle acts on the inner surface of a steel pipe pile. The seal ring structure adopts a grouting contact layer and a grouting non-contact layer, wherein the grouting contact layer adopts an upper rubber layer structure, and the grouting non-contact layer is provided with a reinforcement structure. Three structures, including a bottomrigid reinforced mesh layer, a middle reinforced fiber layer and a bottom rubber layer, as well as the middle reinforced fiber layer and a bottom rigid reinforced mesh layer, can be adopted. The reinforcement materials of the seal ring structure have wide sources, and materials can be conveniently fetched. A manufacture technology is easy in implementation, and a production day for construction of the seal ring is not affected. In an installation process, implementation is convenient, a risk that the seal ring fails can be effectively lowered even avoided, and the reinforced grouting seal ring structure can perform the functions of effective sealing, mortar leakage avoidance and grouting material loss reduction.

Description

technical field [0001] The invention belongs to the technical field of offshore wind power engineering, and in particular relates to a reinforced grouting seal ring structure for offshore wind power pile foundations by the pile-first method. Background technique [0002] The offshore pile foundation generally requires grouting to realize the connection between the foundation structure and the pile. However, the grouting material is a material with good fluidity, and it is easy to flow before solidification, so it is generally sealed by a sealing ring, and the sealing ring is generally pre-installed on the foundation structure on the shore or at the wharf. After the piling is in place, the pile head of the steel pipe pile leaks out of the mud surface to a height of only about 2 meters. The operation of inserting the tip of the foundation into the steel pipe pile must be completed under tens of meters of water. The structure will have a certain impact. In the process of inser...

AI Technical Summary

Problems solved by technology

After the piling is in place, the pile head of the steel pipe pile leaks out of the mud surface to a height of only about 2 meters. The operation of inserting the tip of the foundation into the steel pipe pile must be completed under tens of meters of water. The structure will have a certain impact. In the process of inserting steel pipe piles into the foundation, it is difficult to insert the piles in place at one time, so there may be multiple pile insertion and extraction processes.

After the steel pipe pile is hammered to the specified depth by the high-energy piling hammer, the pile head of the steel pipe pile leaking out of the mud surface will be partially damaged, and there will be many prominent burrs, sharp corners, and protrusions. When the steel pipe pile has a certain deviation, the sealing ring is likely to interfere with the steel pipe pile head during the pile insertion process. Due to the heavy foundation structure, the sealing ring is easily damaged by the burrs and sharp corners of the pile head. , protrusion tearing, wear

[0003] In addition, if the piles are not in place at one time, the foundation must be pulled up and the piles reinserted, which will also cause damage to the sealing ring.

Under such repeated action, the grouting sealing ring is easy to fail and damage, resulting in grout leakage during the grouting process, and finally resulting in a large amount of grouting material wasted

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