Sinking and laying process of large-diameter HDPE pipeline under complex offshore working condition

A technology with complex working conditions and large diameter, which is applied in the sewer pipeline system, pipeline laying and maintenance, waterway system, etc., to achieve the effects of reducing impact, reducing demand, improving efficiency and installation accuracy

Inactive Publication Date: 2019-08-30
CCCC THIRD HARBOR ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the above problems, the present invention discloses a sinking process for large-diameter HDPE pipelines under complex offshore conditions, which reduces the impact of wind and wave conditions on construction, reduces the demand for construction sites, saves construction costs, and improves Improve the efficiency and installation accuracy of the construction site

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  • Sinking and laying process of large-diameter HDPE pipeline under complex offshore working condition
  • Sinking and laying process of large-diameter HDPE pipeline under complex offshore working condition

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Embodiment Construction

[0034] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0035] The present invention takes the construction of the supporting circulating water system of the XXX power plant project in the Philippines as an example, and its intake and drainage pipelines adopt HDPE structure. The outer diameter of HDPE pipe reaches 3.7m, which is the first case at home and abroad. After reviewing similar HDPE pipeline sinking cases, capsule floating and water injection sinking technology and pipe laying ship laying technology are mainly used at home and abroad. However, the above two processes have not installed large-diameter pipes with an inner diameter of more than 3m. In addition, the capsule floating, water injection and sinking instal...

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Abstract

The invention discloses a sinking and laying process of a large-diameter HDPE pipeline under a complex offshore working condition. A self-contained pile driver ship with the maximum hoisting weight of200t is used for hoisting the large-diameter HDPE pipeline, a truss is used for hoisting a counterweight block, the counterweight block is divided into an upper half part and a lower half part, the HDPE pipeline is fixed between the upper half part and the lower half part, and finally the HDPE pipeline is hung and laid under the sea surface to be connected. The influence of storm conditions on construction is reduced, the requirement for the construction site is reduced, the construction cost is saved, and the efficiency and the installation precision of the construction site are improved.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a sinking process of a large-diameter HDPE pipeline under complex working conditions at sea. Background technique [0002] Most of the power plants currently being built in Southeast Asia are built by the sea. The project area has a tropical marine climate. The normal wind direction is NE~E, and the strong wind direction is SW. The tidal type in the area where the project is located is diurnal. The characteristics of the tide; the rock and soil layer in the construction area is mainly agglomerate rock formed by volcanic action, and its cementation degree is uneven in the horizontal and vertical directions. One, and its spatial distribution is uncertain. [0003] The intake and drainage pipelines of the supporting circulating water system of some coastal power plant projects adopt HDPE structure. The sinking process mainly adopts the capsule flo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L1/20F16L1/24E03F3/06
CPCE03F3/06F16L1/207F16L1/24
Inventor 蒋建荣吴维莉俞仲明孙飞史金刚
Owner CCCC THIRD HARBOR ENG
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