阅读说明：本技术 一种大直径hdpe管道海上系泊定位方法 (Offshore mooring and positioning method for large-diameter HDPE (high-density polyethylene) pipeline ) 是由 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 于 2020-05-19 设计创作，主要内容包括：本发明公开了一种大直径HDPE管道海上系泊定位方法,利用定位钢管桩、定长缆绳、防风缆绳以及驳船等通用简易设备即可以完成管段的海上系泊定位,并以管段顶推实现缆绳系挂,适用于大直径高密度聚乙烯管道灌水沉放前的定位作业,适用于各种水深,对船机设备要求低,所需操作人员数量较少。此发明用于港口工程、交通工程、水利工程、公路工程领域。(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.)

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:

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.

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.

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.