WO2022062067A1

WO2022062067A1 - Method for transporting large-diameter over-long hdpe pipelines from land into water

Info

Publication number: WO2022062067A1
Application number: PCT/CN2020/125365
Authority: WO
Inventors: 曾凡; 薛林虎; 刘凯; 许云飞; 胡汉卿; 冯振周; 吴凯; 左华南; 甘世行; 宋敬东
Original assignee: 中交第四航务工程局有限公司
Priority date: 2020-09-23
Filing date: 2020-10-30
Publication date: 2022-03-31
Also published as: SA523440165B1; CN112228632A; CN112228632B

Abstract

A method for transporting large-diameter over-long HDPE pipelines from land into water. After pipelines are welded in a welding area and concrete is poured into ballast blocks, an on-shore side construction platform directly rolls the pipelines to a water surface of a base groove. Said method greatly shortens a transportation distance, ensures that the pipelines do not collide with the installed pipe sections during transportation, and has a low production cost and high operability.

Description

Large-diameter and ultra-long HDPE pipelines onshore, transporting and entering water

technical field

The invention relates to the fields of port engineering, traffic engineering and water conservancy engineering, in particular to a method for on-land transportation of large-diameter and super-long HDPE pipelines into water.

Background technique

High-density polyethylene pipe (hereinafter referred to as HDPE pipe) is a new type of green environmental protection building material product. It has the advantages of long service life, low fluid resistance and strong corrosion resistance. It is widely used in water supply (diversion) systems, drainage systems and gas transmission. and many other fields.

In the application of HDPE pipeline water intake and drainage engineering, the discharge of Helong section is the last link of pipeline construction, and its construction technology and construction quality have a significant impact on the entire project. When the HDPE pipeline is installed to the final closing section, there are usually two methods of sea shipment and land shipment. Since the closing section is on the shore side, the sea transportation consumes a lot of manpower and material resources. In addition, the draft is not enough, and the sea transportation will cause the collision of the installed and settled pipelines, resulting in pipeline damage.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a large-diameter and ultra-long HDPE pipeline onshore transporting and entering water method, which can greatly save construction costs.

According to the embodiment of the first aspect of the present invention, there is provided a large-diameter and ultra-long HDPE pipeline onshore, transporting and entering water method, including a closed pipe section, an installed pipe section on the shore side, an installed pipe section on the sea side, a steel wire rope, a sling, a hoist and an excavator , including the following steps:

S1: prefabricated ballast block;

S2: leveling and pressing the construction platform, welding the pipeline;

S3: Concrete is poured, and the construction platform is hardened to the entire rolling area of the water surface of the foundation groove;

S4: cast-in-place concrete after putting the ballast block on the pipeline;

S5: Arrange the excavator and the hoist in the rolling area, and arrange the hoist on the construction platform on the opposite bank;

S6: The excavator pushes the ballast block connected to the pipeline, and the wire rope of the hoist on the opposite bank cooperates with the sling to wrap the pipeline to pull and roll it in the opposite direction.

Beneficial effect: In this method of transporting large-diameter and super-long HDPE pipes into water on land, after welding the pipes in the welding area and pouring concrete with the ballast block, the pipes are directly rolled to the water surface of the foundation groove on the construction platform on the shore side, which greatly shortens the time. The delivery distance is guaranteed, and the delivery process does not collide with the installed pipe section, the required production cost is small, and the operability is high.

According to the large-diameter and ultra-long HDPE pipeline onshore transporting and entering water method according to the embodiment of the first aspect of the present invention, in step S1, the ballast block is a single-hole circular shape, and the ballast block is narrow at the top and wide at the bottom .

According to the method for transporting large-diameter and ultra-long HDPE pipes into and out of water on land according to the embodiment of the first aspect of the present invention, in step S5, the number and power of the excavators and hoists are overcome by the total weight of the pipes and ballast blocks and the ground The static friction force is determined.

According to the method for transporting large-diameter and super-long HDPE pipes into and out of water on land according to the embodiment of the first aspect of the present invention, in step S6, the total length of the wire ropes and slings of the hoists on both sides is determined by the horizontal distance of the slope top of the pipe in the rolling area. Determine the inclination distance from the hoist in the rolling area to the side slope of the opposite bank.

According to the large-diameter and ultra-long HDPE pipeline onshore, transporting and entering water method according to the embodiment of the first aspect of the present invention, the pipe head of the closed pipe section is provided with an expansion joint and a blind plate device.

According to the method for transporting large-diameter and super-long HDPE pipes into and out of water on land according to the embodiment of the first aspect of the present invention, in step S3, the concrete hardening construction platform is poured to the entire rolling area of the water surface of the foundation groove, and the slope top line of the construction platform is straight and straight , The slope of the construction platform is flat without high points.

According to the method for transporting large-diameter and super-long HDPE pipes into and out of water on land according to the embodiment of the first aspect of the present invention, in step S4, the ballast block is covered with the pipe and then concrete is cast in place, and after the formwork is removed, the ballast block is placed on the whole Flatten the hardened ground and stack sandbags on either side of the ballast block.

Description of drawings

Below in conjunction with accompanying drawing and embodiment, the present invention is further described;

1 is a schematic diagram of a pipeline rolling launching process according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the second process of rolling the pipeline into the water according to the embodiment of the present invention;

Fig. 3 is a schematic diagram of the third schematic diagram of the pipeline rolling launching process according to the embodiment of the present invention;

Fig. 4 is a schematic diagram of the action process of the hoist on the pipeline according to the embodiment of the present invention;

FIG. 5 is a schematic diagram of the second schematic diagram of the action process of the hoist on the pipeline according to the embodiment of the present invention;

FIG. 6 is a schematic diagram of a ballast block according to an embodiment of the present invention.

detailed description

This part will describe the specific embodiments of the present invention in detail, and the preferred embodiments of the present invention are shown in the accompanying drawings. Each technical feature and overall technical solution of the invention should not be construed as limiting the protection scope of the invention.

In the description of the present invention, it should be understood that the azimuth description, such as the azimuth or position relationship indicated by up, down, front, rear, left, right, etc., is based on the azimuth or position relationship shown in the drawings, only In order to facilitate the description of the present invention and simplify the description, it is not indicated or implied that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including this number, above, below, within, etc. are understood as including this number. If it is described that the first and the second are only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance, or indicating the number of the indicated technical features or the order of the indicated technical features. relation.

In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

1 to 6, a large-diameter and ultra-long HDPE pipeline is transported into and out of water on land, including a closed pipe section, an installed pipe section on the shore side, an installed pipe section on the sea side, a wire rope 1, a sling 2, a hoist 3 and an excavator 4. , the pipe head of the closed pipe section is provided with an expansion joint and a blind plate device, and the wire rope 1 and the sling 2 have a head hanging point, including the following steps:

S1: prefabricated ballast block 5;

S2: Leveling and pressing the construction platform, welding pipelines, leveling and pressing the construction platform, to ensure a good on-site construction environment in the pipeline welding area, and to avoid the impact of the bottom surface settlement on the pipeline welding quality and pipeline installation;

S3: Pour concrete, harden the entire rolling area of the construction platform to the water surface of the foundation groove, the slope top line of the construction platform is straight, and the slope surface of the construction platform is flat without high points, so as to avoid affecting the rolling of the pipeline;

S4: Put the ballast block 5 on the pipeline and cast the concrete in situ;

S5: Arrange excavator 4 and hoist 3 in the rolling area, and arrange hoist 3 on the construction platform on the opposite bank;

S6: The excavator 4 pushes the ballast block 5 connected to the pipeline, the hoist 3 steel wire rope on the opposite bank cooperates with the sling 2 to wrap the pipeline and roll it in the opposite direction, so as to avoid direct contact with the pipeline and damage the pipeline, and the hoist sling in the rolling area is fastened to the pipeline, and the length is fixed. The steel wire rope drags it backward until the pipeline enters the water. The excavator 4 provides an initial external force to make the contact between the pipeline and the ground change from static friction to rolling friction. The length of the sling 2 is equal to the horizontal distance from the pipeline to the top of the slope plus the margin of several meters is equal to the circumference of the outer diameter of the pipeline, so that the pipeline reversely rolls to the top of the slope and then rolls down the slope until it enters the water. The length is less than the inclination distance from hoist 3 to the slope on the opposite bank to prevent the pipeline from rolling to the slope on the opposite bank after being launched.

Among them, in step S1, the ballast block 5 is a single-hole circular shape, which can facilitate the rolling of the pipeline, and the ballast block 5 is narrow at the top and wide at the bottom, so that the center of gravity is downward after launching, and the pipeline is not twisted and deformed.

Specifically, the smaller the height difference between the construction platform and the water surface of the foundation groove, the better, that is, the potential energy of the pipeline rolling is the smallest, and the risk is easy to control. The delivery is divided into two sections. The first stage is plane rolling. The plane rolling distance needs to be calculated, that is, the distance between the initial position of the pipeline and the top of the slope. According to this distance, the length of the back slipping wire rope is reserved. The second stage is slope rolling. Start the hoist on the opposite bank, and use the jog traction method to pull the pipeline. During the first stage, keep the axis of the pipeline synchronous. If it is not synchronous, adjust it through the hoist 3. Use square wood to fix the position of the pipeline that does not need to be adjusted for each adjustment, and then adjust For the position that needs to be adjusted, when the adjustment is completed, remove the square wood and continue to pull the pipeline synchronously until the pipeline rolls to the top of the slope. When the first stage of rolling is completed, check whether the rear wire rope and sling are firm, and whether there are obstacles or personnel in the shipping area. After the inspection, the rear wire rope and sling are in a loose state at this time, and the reserved rear wire rope is calculated. the length of the pipeline, start the hoist on the opposite bank again to pull the pipeline until the slope of the pipeline rolls into the water, and tighten the wire rope before the pipeline rolls to the slope on the opposite bank.

In this embodiment, the number and power of the excavator 4 and the hoisting machine 3 are determined by the total weight of the pipeline and the ballast block overcoming the static friction force with the ground. The total length of the wire ropes and slings of the winches 3 on both sides is determined by the horizontal distance from the top of the pipeline slope in the rolling area and the inclined distance from the winches in the rolling area to the side slope on the opposite bank.

In a specific embodiment, in step S4, the ballast block 5 is put on the pipeline and then the concrete is cast in place. After the formwork is removed, the ballast block 5 is placed on the leveled, compacted and hardened ground. Stack sandbags on the side to prevent the pipes from rolling, and then remove the sandbags when the pipes enter the water.

This method of transporting large-diameter and super-long HDPE pipes into water on land. After the welding of pipes and ballast block 5 in the welding area is completed, the pipes are directly rolled to the water surface of the foundation groove on the construction platform on the shore side. This method greatly shortens the transportation time. Distance, and ensure that the delivery process does not collide with the installed pipe section, the required production cost is small, and the operability is high.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments. Within the scope of knowledge possessed by those of ordinary skill in the technical field, various modifications can be made without departing from the purpose of the present invention. kind of change.

Claims

A method for transporting large-diameter and super-long HDPE pipes into and out of water on land, comprising a closed pipe section, an installed pipe section on the shore side, an installed pipe section on the sea side, a steel wire rope, a sling, a hoist and an excavator, and is characterized in that, it includes the following steps:

S1: prefabricated ballast block;

S2: leveling and pressing the construction platform, welding the pipeline;

S3: Concrete is poured, and the construction platform is hardened to the entire rolling area of the water surface of the foundation groove;

S4: cast-in-place concrete after putting the ballast block on the pipeline;

S5: Arrange the excavator and the hoist in the rolling area, and arrange the hoist on the construction platform on the opposite bank;

S6: The excavator pushes the ballast block connected to the pipeline, and the wire rope of the hoist on the opposite bank cooperates with the sling to wrap the pipeline to pull and roll it in the opposite direction.
The method for transporting large-diameter and super-long HDPE pipelines into and out of water on land according to claim 1, wherein in step S1, the ballast block is a single-hole circular shape, and the ballast block is narrow at the top and wide at the bottom .
The method for transporting large-diameter and super-long HDPE pipelines into and out of water on land according to claim 1, characterized in that: in step S5, the number and power of the excavators and hoists are overcome by the total weight of the pipeline and the ballast block and the ground The static friction force is determined.
The method for transporting large-diameter and super-long HDPE pipelines into and out of water on land according to claim 1, wherein in step S6, the total length of the wire rope and the sling of the hoist on both sides is determined by the horizontal distance of the slope top of the pipeline in the rolling area. Determine the inclination distance from the hoist in the rolling area to the side slope of the opposite bank.
The large-diameter and ultra-long HDPE pipeline on-land transportation and water-entry method according to claim 1, characterized in that: the pipe head of the closed pipe section is provided with an expansion joint and a blind plate device.
The large-diameter and ultra-long HDPE pipeline on-land transportation and water entry method according to claim 1, characterized in that: in step S3, the concrete hardening construction platform is poured to the entire rolling area of the water surface of the foundation groove, and the slope top line of the construction platform is straight and straight , The slope of the construction platform is flat and has no high points.
The method for transporting large-diameter and super-long HDPE pipes into water on land according to claim 1, characterized in that: in step S4, the ballast block is covered with the pipe and then the concrete is cast in place, and after the formwork is removed, the ballast block is placed on the whole Flatten the hardened ground and stack sandbags on either side of the ballast block.