Construction method for connecting new pipe jacking wells to old ones

Abstract

The invention relates to the field of underground pipeline construction, in particular to a newly-built top pipe well and old pipe well connecting construction method. The method includes that a connecting steel pipe is arranged. The method is characterized by including the following steps: constructing structure of a newly-built top pipe well, and reserving a connecting steel pipe mounting port according to design requirements; reinforcing two sides of port areas where an old pipe well and the newly-built pipe well are connected with a connecting pipeline and four sides of ports where the pipe wells are connected with the connecting steel pipe, chiseling to remove a retaining structure to 70% of the outer wall of the old well according to size of a reserved hole of the newly-built top pipe well after construction of a new top pipe and the top pipe well structure is completed fully, and connecting the connecting steel pipe with the new pipe well and the old pipe well according to the design requirements; pouring concrete in the outer layer of the connecting steel pipe; connecting the connecting steel pipe into the old well, and cutting well walls underwater at a connecting hole mark until the connecting steel pipe is completely communicated with the new well and the old well. By adopting the above design, the newly-built top pipe well and old pipe well connecting construction method is quick in construction progress, low in disturbance of surrounding strata, investment saving and labor saving.

Description

technical field [0001] The invention relates to the field of underground pipeline construction, in particular to the field of docking of cast-in-situ reinforced concrete caisson structures. Background technique [0002] Generally, when the newly-built pipe jacking well is connected with the old pipe well, slotting and buried pipes are used for construction. The slotted and buried pipes need to be surrounded by protective piles first, and then earthwork excavation is carried out. This process has a large amount of excavated soil, a long construction period, a lot of manpower and material resources, and has a great impact on the surrounding pipelines and structures. Contents of the invention [0003] The object of the present invention is to provide a construction method for connecting a new pipe-jacking well and an old pipe well with fast construction progress, less disturbance to surrounding strata, and reduced ground excavation area. [0004] In order to achieve the abov...

AI Technical Summary

Problems solved by technology

This process has a large amount of excavated soil, a long construction period, a lot of manpower and material resources, and has a great impact on the surrounding pipelines and structures.