Construction method for penetrating continuously-wound glass reinforced plastic pipe into large-diameter concrete pipe

Abstract

The invention discloses a construction method for penetrating a continuously wound glass reinforced plastic pipe into a large-diameter concrete pipe, which comprises the steps of hoisting the glass reinforced plastic pipe, mounting the glass reinforced plastic pipe, grouting and the like, and is characterized in that the whole pipe section is divided into m grouting areas for n times of grouting, performing quantitative grouting from grouting holes of the corresponding grouting areas according to the calculated set grouting amount during construction, and stopping grouting after the grouting amount is reached; enabling slurry for grouting each time to automatically flow and level in each grouting area; and performing next grouting after the slurry is initially cemented, till n times of grouting are completed in sequence. According to the construction method, a multi-stage multi-grouting mode is adopted, and grouting is conducted in an inner pipe; the grouting position and the grouting amount can be accurately controlled, and the problem of pipe floating during grouting is effectively avoided; the faulted grouting pipe is easy to maintain, and it is guaranteed that grouting is evenly conducted on the whole pipe section through multi-stage grouting; secondly, the glass reinforced plastic pipe with the maximum length can be selected according to the diameter range of a working well, and the installation frequency is reduced; and working hours are saved.

Description

technical field [0001] The invention belongs to a method for construction and installation of a continuous winding glass fiber reinforced plastic pipe in an inner pipe, in particular to a construction method for a large-diameter concrete pipe through a continuous winding glass steel pipe. Background technique [0002] Nowadays, in the construction and installation of large-diameter concrete pipes through glass steel pipes, the glass steel pipes are installed in the working well by hydraulic cylinder jacking and directly pushed into the concrete pipes. 1. The glass steel pipe is the third-generation continuous winding glass steel pipe. The glass steel pipe uses a full-width rubber sleeve joint for connection and sealing. The sleeve joint is not fixed with the pipeline. It is generally used in excavation pipe projects, but During the pipe jacking, the sleeve joint and the pipe are easy to deviate left and right, so that the installation standard cannot be met, and it is easy t...

AI Technical Summary

Problems solved by technology

1. The glass steel pipe is the third-generation continuous winding glass steel pipe. The glass steel pipe uses a full-width rubber sleeve joint for connection and sealing. The sleeve joint is not fixed with the pipeline. It is generally used in excavation pipe projects, but During the pipe jacking, the sleeve joint and the pipe are easy to deviate left and right, so that the installation standard cannot be met, and it is easy to cause construction defects of the pipe and lead to long-term rework of the project

2. Since the hydraulic cylinder needs to be equipped with a backrest and the length of its own cylinder, the installation space of the glass steel pipe in the working well is compressed, which directly leads to the shortening of the pipeline length, which will increase a lot of installation work, which will not only cost additional installation costs but also Very likely to cause delays in the construction period

3. When the glass steel pipe is directly pushed into the concrete pipe, the gravel or gravel in the concrete pipe will easily damage the outer surface of the glass steel pipe.

4. Due to the hydraulic cylinder jacking method, the longer the jacking distance, the greater the jacking force used. Once the jacking force of the oil cylinder exceeds the limit jacking force of the glass steel pipe, it will easily cause damage to the overall structure of the pipeline. Therefore, the jacking length of the project is very limited

5. The subsequent grouting work between the two pipes adopts external grouting. The external grouting needs to bind the grouting pipe on the glass steel pipe. The grouting pipe is pre-buried in the upper part of the glass steel pipe along with the pipeline. During the grouting process If the pause time is too long, the cement slurry in the grouting pipe is likely to solidify, which requires re-inserting the grouting pipe. This grouting method is cumbersome and time-consuming, and it is difficult to accurately control the position and amount of grouting. In turn, it is easy to cause the entire pipeline to float to varying degrees, which directly affects the installation quality of the pipeline.

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