Ground erection construction method for oil-gas pipeline engineering in freeze soil area and under low-temperature condition

Abstract

The invention provides a ground erection construction method for oil-gas pipeline engineering in a freeze soil area and under a low-temperature condition, and relates to the technical field of erection construction for oil-gas pipelines. The ground erection construction method for the oil-gas pipeline engineering in the freeze soil area and under the low-temperature condition comprises the following steps: S1, preparation before construction; S2, cleaning for a construction working zone and building for a gravel road construction road; S3, erection for a support frame; S4, cleaning and grinding for a pipe port; S5, pipeline welding; and S6, heat-insulation treatment for the pipeline. According to the ground erection construction method for the oil-gas pipeline engineering in the freeze soil area and under the low-temperature condition, a low-temperature anchoring method is adopted, the low-temperature anchoring method is adopted for a pipe pile, a lower-part foundation soil of the pipepile is frozen into a large spheroid by a heat pipe, and large friction is generated between the pipe pile and permafrost; and in this way, the pipe pile cannot be lifted and sunken, the foundation soil in the vicinity of the pipe pile starts to be frozen before other places in winter, and then radially frozen towards the surrounding, and therefore, the lifting function is lost, and the thaw collapse of the pipeline is reduced.

Description

technical field [0001] The invention relates to the technical field of oil and gas pipeline erection construction, in particular to an aboveground erection construction method for oil and gas pipeline projects in permafrost regions and low temperature conditions. Background technique [0002] Petroleum and economic development in permafrost areas continue to promote the development of oil pipeline technology, but the thawing and frost heave problems of oil pipelines in permafrost areas are still key problems, and the design and construction of pipelines in cold regions must consider the terrain and environmental conditions along the line The impact of frost heave and thaw settlement, and the corresponding pipeline engineering foundation and structural integrity, the success of the Alaska oil pipeline project is due to sufficient scientific research investment, discussion and decision time, and finally adopted a series of innovative designs to protect for many years Permafros...

AI Technical Summary

Problems solved by technology

At present, there are only three long-distance pipelines in permafrost areas in China, namely the Golmud-Lhasa Refined Oil Pipeline, which was put into operation in 1977, the first Sino-Russian crude oil pipeline, which was put into operation in 2006, and the second Sino-Russian crude oil pipeline, which was put into operation in 2018. In the process of pipeline operation, frost heaving and thawing settlement are relatively significant, so now there is an urgent need for an above-ground erection method for oil and gas pipeline projects in permafrost regions and low temperature conditions to solve the above-mentioned thawing settlement in the background technology and frost heave problems