阅读说明：本技术 一种大直径超长hdpe管道水下定位方法 (Underwater positioning method for large-diameter overlong HDPE (high-density polyethylene) pipeline ) 是由 梁邦炎 薛林虎 陈猛 井阳 曾凡 马亿光明 冯振周 刘凯 周杨 甘世行 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超长HDPE管道水下定位方法,利用若干定位缆绳、防风缆绳等钢丝绳、固定结构以及驳船等通用简易设备就可以完成管道水下精定位,尤其适用于大直径超长HDPE管水下对接前的水下精定位作业,适用水深范围广、对船机设备要求低、用于操作以及安全系数高等优点。此发明用于港口工程、交通工程、水利工程领域。(The invention discloses an underwater positioning method for a large-diameter overlong HDPE pipeline, which can finish underwater precise positioning of the pipeline by utilizing a plurality of positioning cables, steel wire ropes such as windproof cables, fixed structures, barges and other universal simple equipment, is particularly suitable for underwater precise positioning operation before underwater butt joint of the large-diameter overlong HDPE pipe, and has the advantages of wide applicable water depth range, low requirement on ship equipment, high safety coefficient and the like. The invention is used in the fields of port engineering, traffic engineering and hydraulic engineering.)

1. An underwater positioning method for a large-diameter overlong HDPE pipeline is characterized by comprising the following steps:

s1: preparing a pipe section, a positioning cable, a windproof cable, a fixed structure and a barge in advance, wherein the barge is provided with a winch, and a hanging point is reserved on the pipe section in advance;

s2: floating the pipe section in place, connecting the windproof cables on two sides of the pipe section, and connecting the two windproof cables with hanging points on the pipe section;

s3: the length of the windproof mooring rope on one side is reserved with at least 1m of allowance according to the design, the length of the windproof mooring rope on the other side is reserved with at least 5m of allowance according to the design, and sleeve heads are arranged at two ends of the positioning mooring rope;

s4: after the windproof mooring of the pipe section is finished, a positioning cable is pulled to enable the pipe section to be positioned in a translation mode towards the installation position;

s5: the bottom joint sleeve head of the positioning cable is overlapped with the hanging point of the pipe section, and the positioning cable and the pipe section are connected by a buckle to finish positioning;

s6: and after the underwater positioning is finished, performing irrigation, sinking and submerging operation.

2. The underwater positioning method for the large-diameter ultra-long HDPE pipe according to claim 1, characterized in that: the fixed structure is a concrete anchor block or a steel pipe pile.

3. The underwater positioning method for the large-diameter ultra-long HDPE pipe according to claim 1, characterized in that: in step S2, the length of the windproof cables on both sides is limited to the accuracy of installation of the duct.

4. The underwater positioning method for the large-diameter ultra-long HDPE pipe according to claim 1, characterized in that: after the windproof mooring rope is hung, the pipe section reversely translates under the matching of a winch, a sampan and an anchor boat of the barge so as to meet the requirement of mooring rope hanging.

5. The underwater positioning method for the large-diameter ultra-long HDPE pipe according to claim 1, characterized in that: in step S2, the positioning cable rope includes first wire rope and second wire rope, first wire rope links to each other with fixed knot structure, the abundant surplus of 2m is reserved according to the design to first wire rope length, first wire rope both ends set up the pullover, second wire rope is connected with first section wire rope, second wire rope walks around hang on the pipe section, is connected to sampan, pulls the pipe section translation location through sampan.

6. The underwater positioning method for the large-diameter ultra-long HDPE pipe according to claim 1, characterized in that: in step S6, the pipe section axis is secondarily accurately positioned during the sinking process.

7. The underwater positioning method for the large-diameter ultra-long HDPE pipe according to claim 6, characterized in that: utilize sampan to pull the free section of location hawser, the adjustment the horizontal position of pipeline section accomplishes the location construction under water of pipeline section.

8. The underwater positioning method for the large-diameter ultra-long HDPE pipe according to claim 1, characterized in that: in step S4, the pipe section is traversed underwater using the power vessel.

9. The underwater positioning method for the large-diameter ultra-long HDPE pipe according to claim 1, characterized in that: in step S2, the length of the wind-resistant cable is determined by taking into account the meteorological conditions and the base groove width engineering conditions.

Technical Field

The invention relates to the fields of port engineering, traffic engineering, hydraulic engineering and the like, in particular to an underwater positioning method for a large-diameter overlong 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. When the HDPE pipe is installed underwater, after the irrigation and sinking process is completed, the next underwater butt joint process can be performed only by performing underwater fine positioning, so that the final installation precision of the pipeline is directly determined by the underwater fine positioning process. Aiming at the underwater positioning process of the large-diameter overlong HDPE pipe, the existing positioning method such as underwater GPS positioning has high cost or complex operation, and is difficult to ensure the pipe section installation efficiency and save the production cost. With the development of economy, the application of large-diameter HDPE pipelines is necessarily wider, so that the development of an underwater precise positioning method suitable for large-diameter HDPE pipelines is urgently needed.

Disclosure of Invention

The invention aims to provide an underwater positioning method for a large-diameter and ultra-long HDPE pipeline.

The technical scheme adopted by the invention is as follows:

an underwater positioning method for a large-diameter overlong HDPE pipeline comprises the following steps:

s1: preparing a pipe section, a positioning cable, a windproof cable, a fixed structure and a barge in advance, wherein the barge is provided with a winch, and a hanging point is reserved on the pipe section in advance;

s2: floating the pipe section in place, connecting the windproof cables on two sides of the pipe section, and connecting the two windproof cables with hanging points on the pipe section;

s3: the length of the windproof mooring rope on one side is reserved with at least 1m of allowance according to the design, the length of the windproof mooring rope on the other side is reserved with at least 5m of allowance according to the design, and sleeve heads are arranged at two ends of the positioning mooring rope;

s4: after the windproof mooring of the pipe section is finished, a positioning cable is pulled to enable the pipe section to be positioned in a translation mode towards the installation position;

s5: the bottom joint sleeve head of the positioning cable is overlapped with the hanging point of the pipe section, and the positioning cable and the pipe section are connected by a buckle to finish positioning;

s6: and after the underwater positioning is finished, performing irrigation, sinking and submerging operation.

Further as an improvement of the technical scheme of the invention, the fixing structure is a concrete anchor block or a steel pipe pile.

As a further improvement of the technical solution of the present invention, in step S2, the allowance of the lengths of the windproof cables on both sides is limited within the installation accuracy of the pipeline.

Further as an improvement of the technical scheme of the invention, after the windproof cable is hung, the pipe section reversely translates under the matching of a winch, a sampan and an anchor boat of the barge so as to meet the requirement of cable hanging.

As a further improvement of the technical solution of the present invention, in step S2, the positioning cable includes a first steel wire rope and a second steel wire rope, the first steel wire rope is connected to the fixed structure, a length of the first steel wire rope is designed to reserve a margin of 2m, two ends of the first steel wire rope are provided with a sleeve, the second steel wire rope is connected to the first steel wire rope, the second steel wire rope bypasses a hanging point on the pipe section and is connected to the sampan, and the pipe section is pulled by the sampan to perform translational positioning.

As a further improvement of the technical solution of the present invention, in step S6, during the sinking process, the axis of the pipe section is secondarily and precisely positioned.

Further as an improvement of the technical scheme of the invention, the sampan is used for pulling the free section of the positioning cable to adjust the horizontal position of the pipe section, so that the underwater positioning construction of the pipe section is completed.

As a further improvement of the technical solution of the present invention, in step S4, the power vessel is used to perform the underwater traversing of the pipe section.

As a further improvement of the technical solution of the present invention, in step S2, the length of the wind-proof rope is determined by comprehensively considering meteorological conditions and engineering conditions of the width of the foundation trench.

The invention has the beneficial effects that: the underwater positioning method for the large-diameter overlong HDPE pipeline can finish underwater precise positioning of the pipeline by utilizing a plurality of positioning cables, steel wire ropes such as windproof cables, fixing structures, barges and other universal simple equipment, is particularly suitable for underwater precise positioning operation before underwater butt joint of the large-diameter overlong HDPE pipe, and has the advantages of wide applicable water depth range, low requirement on ship equipment, high safety coefficient and the like.

Drawings

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

FIG. 1 is a conceptual illustration of the underwater positioning of a pipe segment in accordance with an embodiment of the present invention;

FIG. 2 is a schematic view of a pipe section of an embodiment of the present invention being tied-in to an underwater positioning cable;

FIG. 3 is a schematic view of the movement of a pipe section according to an embodiment of the present invention;

FIG. 4 is a schematic view of the movement locking of the pipe sections according to the embodiment of the present invention;

FIG. 5 is a schematic view of the underwater translational positioning of a pipe segment according to an embodiment of the present 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.