阅读说明：本技术 一种海底锚固系统 (Seabed anchoring system ) 是由 李洪江 刘松玉 童立元 杨涛 于 2020-06-17 设计创作，主要内容包括：本发明提供一种海底锚固系统,包括嵌入桶、自钻杆和张拉索；嵌入桶位于海底硬土层中；自钻杆穿过嵌入桶的内部,其在与嵌入桶底端相对应处设有一圈伸缩型张拉板；伸缩型张拉板为圆盘状,与嵌入桶底端相扣合；张拉索设置于自钻杆的内部,并与伸缩型张拉板相安装。本发明充分利用了海床中硬土层承载力强的特征,解决了浅层锚固系统承载力不足和深层全长桩锚系统材料浪费的问题,很好地实现了海底锚固系统承载力与造价两者之间的平衡问题；安装简便,承载力高,易于掌握且经济安全。(The invention provides a seabed anchoring system, which comprises an embedded barrel, a self-drilling rod and a tension cable, wherein the embedded barrel is provided with a plurality of through holes; the embedded barrel is positioned in the seabed hard soil layer; the self-drilling rod penetrates through the interior of the embedded barrel, and a circle of telescopic tensioning plate is arranged at the position corresponding to the bottom end of the embedded barrel; the telescopic tensioning plate is disc-shaped and is buckled with the bottom end of the embedded barrel; the tensioning cable is arranged in the self-drilling rod and is installed with the telescopic tensioning plate. The invention fully utilizes the characteristic of strong bearing capacity of a hard soil layer in the seabed, solves the problems of insufficient bearing capacity of a shallow anchoring system and material waste of a deep full-length pile anchoring system, and well realizes the balance between the bearing capacity and the manufacturing cost of the seabed anchoring system; simple installation, high bearing capacity, easy mastering and high economic safety.)

1. A subsea anchoring system, characterized by: comprises an embedded barrel, a self-drilling rod and a tension cable; the embedded barrel is positioned in a seabed hard soil layer; the self-drilling rod penetrates through the interior of the embedded barrel, and a circle of telescopic tensioning plate is arranged at the position corresponding to the bottom end of the embedded barrel; the telescopic tensioning plate is disc-shaped and is buckled with the bottom end of the embedded barrel; the tensioning cable is arranged in the self-drilling rod and is installed with the telescopic tensioning plate.

2. A subsea anchoring system according to claim 1, characterized in that: the construction method comprises the following steps:

(1) determining the size of the embedded barrel and the specifications of the self-drilling rod and the telescopic tension plate according to the actual stratum condition and by combining the size of the external load;

(2) driving the embedding barrel into a seabed soil layer by adopting a static pressure or hammering mode, and selecting a hard soil layer with strong bearing capacity as a target soil layer;

(3) vertically drilling the self-drilling rod into the embedding barrel, wherein the telescopic tensioning plate is always in a closed state in the process, and the drilling is stopped until the telescopic tensioning plate enters the bottom end of the embedding barrel;

(4) the stretching cable exerts pretension force, the telescopic stretching plate is expanded into a disc under the action of external tension force and tightly buckled at the bottom of the embedded barrel, and the telescopic stretching plate and the embedded barrel form a combined structure to resist external load together.

3. A subsea anchoring system according to claim 1, characterized in that: the embedding barrel is a cylindrical hollow barrel, and the height of the embedding barrel is not less than the diameter of the embedding barrel.

4. A subsea anchoring system according to claim 1, characterized in that: and a spiral cutting drill bit is arranged at the front end of the self-drilling rod.

5. Use of a subsea anchoring system, characterized by: and forming a group anchor system by a plurality of seabed anchor systems.

Technical Field

The invention belongs to the field of marine geotechnical engineering, and particularly relates to a seabed anchoring system.

Background

Ocean energy development and ocean infrastructure have entered the unprecedented hot tide, and no matter whether the development is in shallow offshore or deep open sea, the seabed anchoring system is the most extensive construction object. The fixation of marine floating structures (floating platforms, floating wind turbines, etc.) usually provides counter-forces by means of pile/anchor systems buried in the sea bed. Under the influence of the stress characteristics of the floating structure, the seabed anchoring system needs to provide vertical tension or multi-angle and multi-direction tension. To obtain sufficient tension, stronger anchoring systems are required, such as for example the selection of suction anchors with larger diameters or the selection of anchor piles with longer lengths. The suction anchor is a wide and shallow foundation, the penetration depth is generally shallow, and in a marine environment with complex hydrodynamic conditions, once the shallow soil body is liquefied or scoured to a large depth, the bearing capacity of the suction anchor can be failed, and the whole anchoring system and the upper structure face danger. In the case of an anchor pile of an elongated structure, the depth of penetration is generally deep in order to provide sufficient counter-force, which results in waste of material and increased costs for piling.

The construction of the seabed anchoring system is a deep and open sea development trend, and a dense and hemp seabed anchoring system network is inevitably formed on the seabed in the future, so that the selection of a proper anchoring system is particularly important. Traditional anchoring systems such as piling and suction anchoring have large disturbance to the seabed environment, and destroy the marine ecological environment. In addition, the seabed soil layer has layering property, the interbedding property of soft soil and hard soil exists, and the stratum advantages of shallow suction anchors and deep and long anchor pile structures are not fully utilized. Therefore, an efficient and environment-friendly seabed anchoring system is urgently needed to be developed, and the new anchoring system is beneficial to promoting the ocean engineering to develop towards a safer and more sustainable direction.

Disclosure of Invention

To solve the above problems, the present invention discloses a subsea anchoring system.

In order to achieve the purpose, the invention provides the following technical scheme:

a seabed anchoring system comprises an embedding barrel, a self-drilling rod and a tension cable; the embedded barrel is positioned in the seabed hard soil layer; the self-drilling rod penetrates through the interior of the embedded barrel, and a circle of telescopic tensioning plate is arranged at the position corresponding to the bottom end of the embedded barrel; the telescopic tensioning plate is disc-shaped and is buckled with the bottom end of the embedded barrel; the tensioning cable is arranged in the self-drilling rod and is installed with the telescopic tensioning plate. The construction method of the seabed anchoring system comprises the following steps:

(1) determining the size of the embedded barrel and the specifications of the self-drilling rod and the telescopic tension plate according to the actual stratum condition and by combining the size of the external load;

(2) driving the embedding barrel into a seabed soil layer by adopting a static pressure or hammering mode, and selecting a hard soil layer with strong bearing capacity as a target soil layer;

(3) vertically drilling a self-drilling rod into the embedding barrel, wherein the telescopic tensioning plate is always in a closed state in the process, and the drilling is stopped until the telescopic tensioning plate enters the bottom end of the embedding barrel;

(4) the stretching cable exerts pretension force, the telescopic stretching plate is expanded into a disc under the action of external tension force and tightly buckled at the bottom of the embedded barrel, and the telescopic stretching plate and the embedded barrel form a combined structure to resist external load together.

Further, the embedded barrel is a cylindrical hollow barrel, and the height of the embedded barrel is not less than the diameter of the embedded barrel.

Further, a helical cutting bit is installed from the front end of the drill rod.

The application of a seabed anchoring system is to combine a plurality of seabed anchoring systems into a group anchor system.

Compared with the prior art, the invention fully utilizes the characteristic of strong bearing capacity of a hard soil layer in the seabed, solves the problems of insufficient bearing capacity of a shallow anchoring system and material waste of a deep full-length pile anchoring system, and well realizes the balance between the bearing capacity and the manufacturing cost of the seabed anchoring system; simple installation, high bearing capacity, easy mastering and high economic safety.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a self-drilling rod when a telescopic tension plate is closed in the invention;

FIG. 3 is a schematic structural view of a self-drilling rod when the telescopic tension plate is expanded into a disk in the invention;

FIG. 4 is a construction flow chart of the present invention.

List of reference numerals: 1-embedded barrel, 2-self-drilling rod, 3-tension cable, 4-spiral cutting drill bit and 5-telescopic tension plate.

Detailed Description

The technical solutions provided by the present invention will be described in detail below with reference to specific examples, and it should be understood that the following specific embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention.