CN111692428A

CN111692428A - Offshore mooring and positioning method for large-diameter HDPE (high-density polyethylene) pipeline

Info

Publication number: CN111692428A
Application number: CN202010423753.9A
Authority: CN
Inventors: 曾凡; 薛林虎; 梁邦炎; 陈猛; 井阳; 周爱军; 周杨; 甘世行; 黄海; 冯振周
Original assignee: CCCC Fourth Harbor Engineering Co Ltd
Current assignee: CCCC Fourth Harbor Engineering Co Ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2020-09-22
Anticipated expiration: 2040-05-19
Also published as: WO2021232480A1; CN111692428B

Abstract

The invention discloses a large-diameter HDPE pipeline offshore mooring positioning method, which can complete offshore mooring positioning of a pipe section by utilizing universal simple equipment such as a positioning steel pipe pile, a fixed-length cable, a windproof cable, a barge and the like, and realize cable hanging by pushing the pipe section. The invention is used in the fields of port engineering, traffic engineering, hydraulic engineering and highway engineering.

Description

Offshore mooring and positioning method for large-diameter HDPE (high-density polyethylene) pipeline

Technical Field

The invention relates to the field of port engineering, traffic engineering, hydraulic engineering and highway engineering, in particular to a marine mooring and positioning method for a large-diameter HDPE pipeline.

Background

High-density polyethylene pipes (hereinafter referred to as HDPE pipes) are widely used in various fields such as water supply and drainage systems, fuel gas transportation and the like. After the HDPE pipeline reaches the position to be installed, the pipeline section can drift, bend and even be damaged under the action of sea wind waves, and the subsequent construction such as submergence and sinking of the pipeline is influenced. Therefore, before sinking, the pipeline needs to be moored and positioned, so that the pipeline is accurately parked above the foundation trench and kept straight.

At present, the anchoring and positioning process of HDPE pipelines is still limited to small-diameter pipe sections (less than 630 mm), and with the economic development, the application of large-diameter HDPE pipelines is necessarily wider, so that the development of an offshore anchoring and positioning method suitable for large-diameter HDPE pipelines is urgently needed.

Disclosure of Invention

The invention aims to provide a large-diameter HDPE pipeline offshore mooring and positioning method which is easy to operate, high in safety coefficient and low in requirement on ship and aircraft equipment.

The technical scheme adopted by the invention is as follows:

a large-diameter HDPE pipeline offshore mooring and positioning method comprises a pipe section, a positioning steel pipe pile, a fixed-length cable, a windproof cable and a barge, and comprises the following steps:

s1: determining the number and the spacing of the positioning steel pipe piles and the length of a fixed-length cable;

s2: performing pile sinking construction on the positioning steel pipe pile;

s3: floating the pipe section to the foundation trench, anchoring by a barge and pulling the pipe head of the pipe section to float in place;

s4: horizontally moving the pipe section to the upper side of the base groove, deviating the pipe section from the base groove, and tying fixed-length cables on two sides on the positioning steel pipe pile;

s5: pushing the pipe section to the lower side of the base groove to tighten the fixed-length cable on the upper side;

s6: and (5) tying and hanging the windproof mooring rope led out from the positioning steel pipe pile at the lower side, and tying, hanging and positioning.

Further as an improvement of the technical scheme of the invention, a plurality of pulling lugs are arranged on the positioning steel pipe pile, and the length of the fixed-length mooring rope is determined according to the distance between the positioning steel pipe pile and the foundation trench.

As a further improvement of the technical solution of the present invention, in step S2, a vibratory hammer is used in conjunction with a positioning frame to perform pile sinking construction on the positioned steel pipe pile.

The invention further improves the technical scheme that GPS is used for guiding the barge to perform initial positioning, then the positioning frame is measured accurately, the barge anchor cable is used for retracting and positioning, and then the positioning steel pipe pile passes through the positioning frame to complete pile sinking construction.

As a further improvement of the technical solution of the present invention, in step S3, a winch on the barge tightens a wire rope to pull the pipe section in place.

As a further improvement of the technical solution of the present invention, in step S4, the pipe section is moved to the upper side of the foundation trench and then kept straight, and the two ends of the fixed-length cable are respectively pulled to the pipe section and the mooring cable at the fixed position of the steel pipe pile by the anchor boat.

The invention has the beneficial effects that: the marine mooring and positioning method for the large-diameter HDPE pipeline can complete marine mooring and positioning of the pipe section by using universal simple equipment such as a positioning steel pipe pile, a fixed-length cable, a windproof cable, a barge and the like, realizes cable tying and hanging by pushing the pipe section, is suitable for positioning operation before the large-diameter high-density polyethylene pipeline is irrigated and sunk, is suitable for various water depths, has low requirements on ship equipment and requires a small number of operators.

Drawings

The invention will be further described with reference to the accompanying drawings in which:

FIG. 1 is a schematic illustration of a pipe segment docking station according to an embodiment of the present invention;

FIG. 2 is a schematic view of a fixed-length cable tie according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a mooring positioning according to an embodiment of the invention.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1-3, a large-diameter HDPE pipe offshore mooring positioning method comprises a pipe segment 100, a positioning steel pipe pile 200, a fixed-length cable 300, a windproof cable 400 and a barge 500, and comprises the following steps:

s1: determining the number and the spacing of the positioning steel pipe piles 200 and the length of the fixed-length cable 300;

s2: performing pile sinking construction on the positioning steel pipe pile 200 by using a vibration hammer matched with a positioning frame;

s3: floating the pipe section 100 to the foundation pit 600 position, anchoring and pulling the pipe head of the pipe section 100 to float in place by the barge 500;

s4: horizontally moving the pipe section 100 to the upper side of the base groove 600, deviating the pipe section 100 from the base groove 600, and tying the fixed-length cables 300 on two sides on the positioning steel pipe pile 200;

s5: pushing the pipe segment 100 to the lower side of the base groove 600 to tighten the fixed-length cable 300 on the upper side;

s6: and (4) tying and positioning the windproof mooring rope 400 led out from the positioning steel pipe pile 200 at the lower side.

More specifically, the steel pipe pile 200 is provided with a plurality of pulling lugs, the number and the spacing of which are reasonably determined according to the length of the pipe section 100, and the length of the fixed-length cable 300 is determined according to the distance between the positioning steel pipe pile 200 and the foundation trench 600. The barge 500 is matched with a crawler hanging vibration hammer to carry out pile sinking construction, the positioning steel pipe pile 200 is arranged along 15m outside slope feet on two sides of the foundation trench 600, the distance is 80m, the barge 500 is guided to be initially positioned by a GPS, then a positioning frame is accurately measured, the positioning steel pipe pile 200 passes through the positioning frame after being accurately positioned by retracting and releasing anchor cables of the barge 500 in a small range, the positioning steel pipe pile 200 is positioned, and pile sinking construction is started. And in the pile sinking process, continuously re-measuring the pile position by the GPS for checking and adjusting, and completing pile sinking construction. The method comprises the steps that a tugboat is used for pulling a pipe section 100 to be transported to an installation position in a floating mode, a barge 500 is anchored in advance and positioned at a position which is about 100m away from a pipe head, after the pipe section 100 enters an installation area, the tugboat continues to drag the pipe section 100 until the tugboat is about 90m away from the barge 500, a winch steel wire rope of the barge 500 is used for mooring the pipe head and is pulled in place, fixed-length cables 300 on two sides are tied, after the fixed-length cables 300 are tied, the pipeline is pushed from the upper side to the lower side by the anchor boat 700 until the fixed-length cables 300 on the upper side are completely tightened, a windproof cable 400 led out from a steel pipe pile 200 on the lower side is tied to a pipe section 100 preset.

The offshore mooring and positioning method for the large-diameter HDPE pipeline can complete offshore mooring and positioning of the pipe section 100 by utilizing universal simple equipment such as the positioning steel pipe pile 200, the fixed-length cable 300, the windproof cable 400, the barge 500 and the like, and realize cable tying by pushing the pipe section 100, is suitable for positioning operation before the large-diameter high-density polyethylene pipeline is irrigated and sunk, is suitable for various water depths, has low requirements on ship equipment and requires a small number of operators.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A large-diameter HDPE pipeline offshore mooring and positioning method comprises a pipe section, a positioning steel pipe pile, a fixed-length cable, a windproof cable and a barge, and is characterized by comprising the following steps:

s2: performing pile sinking construction on the positioning steel pipe pile;

2. The large-diameter HDPE pipe offshore mooring and positioning method according to claim 1, characterized in that: the positioning steel pipe pile is provided with a plurality of pulling lugs, and the length of the fixed-length mooring rope is determined according to the distance between the positioning steel pipe pile and the foundation trench.

3. The large-diameter HDPE pipe offshore mooring and positioning method according to claim 1, characterized in that: in step S2, the steel pipe pile is positioned by using a vibration hammer in conjunction with a positioning frame.

4. The large-diameter HDPE pipe offshore mooring and positioning method according to claim 3, characterized in that: and (3) guiding the barge to perform primary positioning by using a GPS, finely measuring a positioning frame, retracting and positioning through an anchor cable of the barge, penetrating the positioning steel pipe pile through the positioning frame, and completing pile sinking construction.

5. The large-diameter HDPE pipe offshore mooring and positioning method according to claim 1, characterized in that: in step S3, a winch on the barge tightens the wire rope to pull the pipe section into place.

6. The large-diameter HDPE pipe offshore mooring and positioning method according to claim 1, characterized in that: in step S4, the pipe section is moved to the upper side of the foundation trench and then kept straight, and the two ends of the fixed-length cable are respectively pulled to the pipe section and the mooring cable at the fixed position of the steel pipe pile by the anchor boat.