Small excavation segment welding type underground vacuum pipeline and construction method thereof

Abstract

The invention discloses a small excavation segment welding type underground vacuum pipeline and a construction method thereof. The small excavation segment welding type underground vacuum pipeline comprises an underground vacuum pipeline body built by splicing and welding segments, the underground vacuum pipeline body is supported by a front guide pile foundation, and reinforcing rib rings are arranged on the periphery of the underground vacuum pipeline body; and the construction method comprises the following steps that, firstly, in the extension direction of a mountain or an underground vacuum pipeline traffic line, excavation is carried out according to the section slightly larger than the outer diameter of the underground vacuum pipeline body and smaller than the double diameter of the underground vacuum pipeline body, and the front guide pile foundation is constructed and built according to the line position precision requirement every time when excavation is carried out forwards by a certain distance; secondly, a support and a rib ring are installed, and other segments are assembled and welded; thirdly, extending excavation is carried out, and the front guide pile foundation is laid; and fourthly, repeated and circular construction is carried out until the construction is finished. According to a structure and the construction method, the construction cost of the underground vacuum pipeline body can be effectively reduced; and the anti-seismic and anti-geological-deformation capability of the underground vacuum pipeline body is improved, and it is guaranteed that the underground vacuum pipeline body has the high line position precision and is fast in the construction progress.

Description

technical field [0001] The invention belongs to the technical field of vacuum pipeline high-speed maglev traffic engineering construction, and in particular relates to a small excavation segment welded underground vacuum pipeline and a construction method thereof. Background technique [0002] Like traditional railways and highways, vacuum tube high-speed maglev transportation can be built on the ground (including elevated) or underground. When encountering a mountain or building in an urban area with dense existing buildings, it has to be built underground. [0003] Railway tunnels and road tunnels are usually constructed by mining method, drill and blast method or shield method, and then reinforced with concrete lining. In addition to adopting the construction methods of the above-mentioned railway tunnels and highway tunnels, the construction of subway tunnels also uses the excavation method for construction. The section of the single-hole single-track subway tunnel is ...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the excavation section of the tunnel is large, and the laying of the vacuum pipeline becomes a secondary construction, which will increase the construction cost

[0010] The pipe jacking method is only suitable for short-distance water transmission and municipal pipe network projects. When the underground vacuum pipeline traffic line is very long, the pipe jacking method is not economical, and the shape and position accuracy of the completed pipeline cannot be guaranteed.

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