Construction method for internally penetrating steel pipes for top pipe of water diversion project

Abstract

The invention discloses a construction method for internally penetrating steel pipes for a top pipe of a water diversion project. The construction method comprises the following steps that (a) construction preparation is conducted; (b) the first steel pipe is in place; (c) the first steel pipe is positioned; and (d) the pipes are penetrated one by one. According to the construction method, the construction difficulty is low, the efficiency is high, flexibility and applicability are achieved, the front and back steps are orderly, control is convenient, the construction quality is ensured, steel pipe pushing is convenient and fast, the equipment input cost is low, the front steel pipe and the back steel pipe are connected firmly, the structure is stable, the sealing performance is high, and the service life is long.

Description

technical field [0001] The invention belongs to the technical field of pipeline construction, and in particular relates to a construction method for internally piercing steel pipes for pipe jacking in water diversion projects. Background technique [0002] Pipe jacking construction is one of the construction methods for laying pipelines underground and using less or no excavation technology, and is widely used in water diversion projects. Most of the jacking pipes are reinforced concrete pipes, and the poor installation quality of the rubber sealing rings between the pipe joints may lead to poor airtightness of the pipe as a whole. Therefore, it is necessary to install steel pipes in the jacking pipes as flow passages. [0003] During the construction process, the next section of steel pipe is hoisted into the working shaft and welded with the previous section of steel pipe, and then jacked by the pipe jacking machine. This cycle continues until all construction is completed...

AI Technical Summary

Problems solved by technology

Most of the jacking pipes are reinforced concrete pipes, and the poor installation quality of the rubber sealing rings between the pipe joints may lead to poor airtightness of the pipe as a whole. Therefore, it is necessary to install steel pipes in the jacking pipes as flow passages

[0003] During the construction process, the next section of steel pipe is hoisted into the working shaft and welded with the previous section of steel pipe, and then jacked by the pipe jacking machine. This cycle continues until all construction is completed. This method has the problem that the installation accuracy of the steel pipe cannot be adjusted and is difficult to control. The friction between the steel pipe and the jacking pipe is large, the wear is serious, and the service life is short; the steel pipe cannot be effectively aligned with the jacking pipe, which will cause the deformation of the jacking pipe and directly act on the steel pipe, causing the steel pipe to be damaged, greatly reducing the overall Pipeline resistance to deformation

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