Systems used for enabling LNG pipelines to cross over dam and construction method of systems

Abstract

The invention relates to systems used for enabling LNG pipelines to cross over a dam and construction methods of the systems, wherein one of the systems used for enabling LNG pipelines to cross over the dam and suitable for a soil, stone-built or concrete dam comprises a box culvert, slopes, LNG pipelines, an electric tracer heating system, a cushion layer and a waterproof layer, wherein the box culvert is stacked at the top of the dam; the slopes are arranged at two sides of the box culvert; the LNG pipelines cross over the box culvert and pass through the dam; the electric tracer heating system is arranged between the top of the dam and a bottom plate of the box culvert; the cushion layer is arranged between the electric tracer heating system and the bottom plate of the box culvert; and the waterproof layer is arranged at the outer side of the box culvert. The other system used for enabling LNG pipelines to cross over the dam and suitable for a soil dam comprises a box culvert, LNG pipelines, an electric tracer heating system, a cushion layer and a waterproof layer, wherein the box culvert is arranged in the dam and passes through the dam; the LNG pipelines cross over the box culvert and pass through the dam; the electric tracer heating system is arranged between a soil body inside the dam and a bottom plate of the box culvert; the cushion layer is arranged between the electric tracer heating system and the bottom plate of the box culvert; and the waterproof layer is arranged at the outer side of the box culvert. The invention also provides another system used for enabling LNG pipelines to cross over the dam and suitable for a soil dam, wherein the system comprises the LNG pipelines directly cross over the inside of the dam and waterproof cushions for wrapping the outer parts of the LNG pipelines.

Description

technical field [0001] The invention relates to an LNG delivery system and a construction method thereof, in particular to an LNG pipeline crossing embankment system and a construction method thereof. Background technique [0002] The main component of liquefied natural gas (LNG, Liquefied Natural Gas) is methane, which is obtained by cooling natural gas to -162°C under normal pressure. The density of liquefied natural gas is about 450kg / m 3 , the volume is about 1 / 600 of the gaseous state. The LNG receiving station is mainly composed of a storage tank area, a dock area, a process area, a gasification area, and a public engineering area. The LNG pipelines between the storage tank area and the dock area must pass through breakwaters. At present, the method of building trestle bridges is usually used to make the LNG pipeline span across the embankment, and the cost of the pipeline is relatively high. In addition, due to the reduction of available shorelines and the lack of ...

AI Technical Summary

Problems solved by technology

At present, there are not many studies on the crossing of LNG pipelines. However, with the continuous development of the LNG industry and the further development of LNG transfer stations and satellite stations along the river and the coast, more and more problems related to the crossing of LNG pipelines will inevitably be involved.

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