阅读说明：本技术 水下导向架施工工艺 (Underwater guide frame construction process ) 是由 廖鹏 陆静东 陈秀珍 马红林 桑琪 张任 沙银根 秦晨阳 于 2021-07-23 设计创作，主要内容包括：本发明一种水下导向架施工工艺的步骤为,步骤1、水下导向架就位；步骤2、吊机的吊索连接至桩管的下部；步骤3、绞车驱动的扁嘴钩钩至于桩管的底部开口端的管壁上；步骤4、桩管横卧于翻转板上后,绞车配合翻转板和吊机翻转桩管；步骤5、吊机将桩管向下插入水下导向架的导向套内,随后将吊索上的吊钩脱离桩管内壁上的吊耳后升起；步骤6、重复步骤4和步骤5,直至所有桩管插入对应的导向套内。本发明一种水下导向架施工工艺,其采用靠近桩管底部的内吊耳形式,从而可方便的在桩管的翻转过程中借助海水水深来操作,无需提高吊机的高度进行施工。(The invention relates to a construction process of an underwater guide frame, which comprises the following steps of 1, positioning the underwater guide frame; step 2, connecting a sling of the crane to the lower part of the pile pipe; step 3, hooking a flat mouth hook driven by a winch on the pipe wall of the bottom opening end of the pile pipe; step 4, after the pile pipe is horizontally laid on the turnover plate, the winch is matched with the turnover plate and the crane to turn over the pile pipe; step 5, inserting the pile pipe downwards into a guide sleeve of the underwater guide frame by the crane, and then lifting the lifting hook on the sling out of the lifting lug on the inner wall of the pile pipe; and 6, repeating the step 4 and the step 5 until all the pile pipes are inserted into the corresponding guide sleeves. The underwater guide frame construction process adopts the form of the inner lifting lug close to the bottom of the pile pipe, so that the operation can be conveniently carried out by means of the depth of seawater in the overturning process of the pile pipe, and the construction can be carried out without increasing the height of a crane.)

1. A construction process of an underwater guide frame comprises the following steps,

step 1, positioning an underwater guide frame on sea mud at a target position;

the method is characterized in that:

step 2, connecting a sling of the crane to the lower part of the pile pipe;

step 3, hooking a flat mouth hook driven by a winch on the pipe wall of the bottom opening end of the pile pipe;

step 4, after the pile pipe is laid on the turnover plate horizontally, when the pile pipe is turned upwards by a certain angle by the turnover plate, the pile pipe begins to slide obliquely downwards, at the moment, the winch is started to release the rope winch, so that the flat mouth hook always drags the bottom pipe wall of the pile pipe in the process of sliding the pile pipe downwards, and the crane synchronously rotates along with the turning and sliding of the pile pipe and downwards releases the sling; when the pile pipe is turned over to a vertical state, the flat mouth hook is separated from the pile pipe, and the winch reversely runs to tighten the rope;

step 5, after the pile pipe is moved to the upper part of the underwater guide frame by the crane, the pile pipe is downwards inserted into a guide sleeve of the underwater guide frame, and then a lifting hook on the sling is lifted after being separated from a lifting lug on the inner wall of the pile pipe;

and 6, repeating the step 4 and the step 5 until all the pile pipes are inserted into the corresponding guide sleeves.

2. The underwater guide frame construction process according to claim 1, wherein: in step 2, a sling of the crane penetrates into the pile pipe and downwards extends to the lower part of the pile pipe, a lifting lug is arranged on the inner pipe wall of the lower part of the pile pipe, and a lifting hook at the bottom of the sling is hooked to the lifting lug on the inner pipe wall of the pile pipe.

3. The underwater guide frame construction process according to claim 1 or 2, wherein: and 3, hooking the flat mouth hook on the pipe wall of the bottom opening end of the pile pipe, connecting the flat mouth hook to one end of an anchor chain through a steel wire and a shackle device, connecting the other end of the anchor chain after penetrating through the chain stopper to a pulley mechanism through the shackle device, and fixing a winch cable on a deck after penetrating through a pulley of the pulley mechanism.

4. The underwater guide frame construction process according to claim 3, wherein: in the step 4, the crane rotates along with the rising of the head of the pile pipe in the process that the pile pipe is positioned on the overturning plate and overturns.

Technical Field

The invention relates to a construction process of an underwater guide frame, and belongs to the technical field of offshore wind power.

Background

At present, in offshore wind power construction, a pile pipe needs to be positioned and guided by an underwater guide frame mechanism. For this reason, the present company has applied for "jacket construction process" in chinese patent 201810255814.8, which can solve the problem of the downward sliding of the underwater guiding frame and the problem of the guiding of the pile pipe. However, two disadvantages are found in practical application: firstly, a pile lifter is introduced after holes are formed in the pipe wall, and the strength of a pile pipe is influenced by the holes formed in the pipe wall; secondly, the tail of the pile pipe can be smoothly turned over after the hook is installed on the turning plate to stabilize the tail of the pile pipe, but in the operation mode, the lifting height of the crane is extremely high due to the fact that the pile lifter is located at the head of the pile pipe in an overlapping mode, so that larger crane equipment is needed, and the improvement of construction efficiency and the reduction of construction cost are not facilitated. In view of the above, a new construction process capable of solving the above problems is needed.

Disclosure of Invention

The invention aims to overcome the defects and provides a construction process of an underwater guide frame, which adopts an inner lug form close to the bottom of a pile pipe, so that the operation can be conveniently carried out by means of the seawater depth in the overturning process of the pile pipe, and the construction can be carried out without increasing the height of a crane.

The purpose of the invention is realized as follows:

a construction process of an underwater guide frame comprises the following steps,

step 1, positioning an underwater guide frame on sea mud at a target position;

step 2, connecting a sling of the crane to the lower part of the pile pipe;

step 3, hooking a flat mouth hook driven by a winch on the pipe wall of the bottom opening end of the pile pipe;

step 4, after the pile pipe is laid on the turnover plate horizontally, when the pile pipe is turned upwards by a certain angle by the turnover plate, the pile pipe begins to slide obliquely downwards, at the moment, the winch is started to release the rope winch, so that the flat mouth hook always drags the bottom pipe wall of the pile pipe in the process of sliding the pile pipe downwards, and the crane synchronously rotates along with the turning and sliding of the pile pipe and downwards releases the sling; when the pile pipe is turned over to a vertical state, the flat mouth hook is separated from the pile pipe, and the winch reversely runs to tighten the rope;

step 5, after the pile pipe is moved to the upper part of the underwater guide frame by the crane, the pile pipe is downwards inserted into a guide sleeve of the underwater guide frame, and then a lifting hook on the sling is lifted after being separated from a lifting lug on the inner wall of the pile pipe;

and 6, repeating the step 4 and the step 5 until all the pile pipes are inserted into the corresponding guide sleeves.

Furthermore, in step 2, a sling of the crane penetrates into the pile pipe and downwards extends to the lower part of the pile pipe, a lifting lug is arranged on the inner pipe wall of the lower part of the pile pipe, and a lifting hook at the bottom of the sling is hooked to the lifting lug on the inner pipe wall of the pile pipe.

Further, in the step 3, a flat mouth hook is hooked on the pipe wall of the bottom opening end of the pile pipe, the flat mouth hook is connected to one end of an anchor chain through a steel wire and a shackle device, the other end of the anchor chain after penetrating through a chain stopper is connected to a pulley mechanism through the shackle device, and a winch rope penetrates through a pulley rear rail of the pulley mechanism and is fixed on a deck;

further, in step 4, the crane rotates along with the rising of the head of the pile pipe in the process that the pile pipe is positioned on the overturning plate and overturns.

Compared with the prior art, the invention has the beneficial effects that:

in the whole construction process, the crane does not need to be lifted upwards (by means of water depth and a flat mouth hook separated from the turnover plate), so that the construction height of the crane is greatly reduced, and construction can be completed by using small and medium-sized cranes. Meanwhile, the crane is connected with the pile pipe through the inner lifting lug, extra holes do not need to be formed, and the rigidity strength of the pile pipe is improved.

Drawings

Fig. 1 is a schematic view of an application state of a flat mouth hook in the underwater guide frame construction process when the flat mouth hook is connected with a winch.

Detailed Description

The invention relates to a construction process of an underwater guide frame, which comprises the following steps:

step 1, positioning an underwater guide frame; the method comprises the following steps:

step 1.1, the construction ship sails to a target position with an underwater guide frame and a pile pipe, a slideway, a crane and a winch are arranged on a deck of the construction ship, the underwater guide frame is horizontally laid down and placed on a front sliding block and a rear sliding block, and the sliding blocks are arranged on the slideway in a sliding mode, so that the underwater guide frame and the pile pipe are convenient to move; the big end of the underwater guide frame faces the stern, and the small end of the underwater guide frame faces the bow;

step 1.2, arranging a turnover plate at the stern of the construction ship, hinging the middle part of the bottom surface of the turnover plate with the tail part of a deck of the construction ship, suspending one half of the turnover plate outside the construction ship, placing the other half of the turnover plate on the deck, and enabling the top surface of the turnover plate to be flush with the top surface of the sliding block;

step 1.3, a pulley is arranged at the stern of the construction ship, the winch is connected to the big head end of the underwater guide frame through the pulley, and a lifting hook of the crane hooks a lifting mechanism at the small head end of the underwater guide frame; then a winch is started to drag the underwater guide frame to slide towards the stern until the big end of the underwater guide frame slides to the turnover plate, then four corners of the underwater guide frame (namely two corners with the big end positioned below and two corners with the small end positioned below) are respectively dragged by four tugboats through cables, when the gravity center of the underwater guide frame slides to the suspended end of the turnover rice, the connection between the winch and the big end of the underwater guide frame is loosened, and the underwater guide frame starts to continuously force the turnover plate to continuously turn over under the action of self gravity until the big end of the underwater guide frame enters water downwards; the whole process avoids the collision and the friction between the underwater guide frame and the end part of the deck;

step 1.4, the underwater guide frame continuously slides downwards, and in the process, ballast water is loaded into a ballast tank on the large-head end of the underwater guide frame until the small-head end of the underwater guide frame leaves the turnover plate (at the moment, the slide block is still embedded on the track in a sliding mode), at the moment, cables of two tugs connected with the small-head end of the underwater guide frame are disconnected, the crane starts to right the underwater guide frame, so that the small-head end of the underwater guide frame is located right above the large-head end of the underwater guide frame, and then the large-head end of the underwater guide frame is disconnected with the cables of the two tugs;

step 1.5, continuously loading ballast water into a ballast tank on the underwater guide frame to enable the underwater guide frame to submerge downwards below the sea surface and then slowly sink until the underwater guide frame is located on the seabed mud surface of a preset target position, and then loosening the connection between the crane and the small head end of the underwater guide frame;

step 2, a sling of the crane penetrates into the pile pipe and downwards extends to the lower part of the pile pipe, a lifting lug is arranged on the inner pipe wall of the lower part of the pile pipe, and a lifting hook at the bottom of the sling is hooked on the lifting lug on the inner pipe wall of the pile pipe (the lifting lug can also be arranged on the outer wall, but the lifting lug influences the appearance and the subsequent pile inserting effect after being arranged on the outer wall, so the structural form of the inner lifting lug is an optimized scheme);

step 3, hooking the flat mouth hook on the pipe wall of the bottom opening end of the pile pipe, connecting the flat mouth hook to one end of an anchor chain through a steel wire and a shackle device, connecting the other end of the anchor chain after penetrating through a chain stopper to a pulley mechanism through the shackle device, and fixing a winch rope on a deck after penetrating through a pulley of the pulley mechanism;

step 4, the pile pipe lies on the turnover plate, a crane is started firstly, the crane rotates along with the rising of the head of the pile pipe in the turnover process of the turnover plate, after the pile pipe is turned upwards by the turnover plate for a certain angle (the angle is related to the friction force between the pile pipe and the turnover plate), the pile pipe starts to slide downwards in an inclined mode, a winch is started to release a rope winch at the moment, the flat mouth hook always drags the bottom pipe wall of the pile pipe in the downward sliding process of the pile pipe, and the crane synchronously rotates along with the turning and downward sliding of the pile pipe and releases the rope downwards; when the pile pipe is turned over to a vertical state, the flat mouth hook is separated from the pile pipe, and the winch reversely runs to tighten the rope;

step 5, after the pile pipe is moved to the upper part of the underwater guide frame by the crane, the pile pipe is downwards inserted into a guide sleeve of the underwater guide frame, and then a lifting hook on the sling is lifted after being separated from a lifting lug on the inner wall of the pile pipe;

and 6, repeating the step 4 and the step 5 until all the pile pipes are inserted into the corresponding guide sleeves.

And 7, piling, namely hoisting the vibration hammer to the pipe orifice of the pile pipe by using the crane to pile until all the pile pipes are driven to a preset depth.

In addition: it should be noted that the above-mentioned embodiment is only a preferred embodiment of the present patent, and any modification or improvement made by those skilled in the art based on the above-mentioned conception is within the protection scope of the present patent.