Under-pressure cutting and splicing construction method for water supply pipelines of different materials

Abstract

The invention provides an under-pressure cutting and splicing construction method for water supply pipelines of different materials. The method comprises the following steps that S1, according to a pipeline drawing and surrounding environment, a water supply main pipeline cutting and splicing touching opening position is selected, covering soil of the water supply main pipeline cutting and splicing touching opening position is excavated until a water supply main pipeline is exposed, and downward excavating continues from the bottom of the water supply main pipeline to form a cutting and splicing work well with the designed depth; S2, a hoop in a connecting sleeve part sleeves the water supply main pipeline cutting and splicing touching opening position, and a connecting flange in the connecting sleeve part is mounted towards the direction of a pipeline planned to be connected; S3, a gap between the hoop and the water supply main pipeline is filled up; S4, one end of a gate valve and the connecting flange are mounted in an abut joint, a water drill is mounted on the other end of the gate valve, and the water drill passes through the position between the gate valve and the water supply main pipeline to form a seal cavity; S5, the gate valve is opened, the water drill is started for opening the water supply main pipeline, after hole forming, the water drill retreats, and the gatevalve is closed; and S6, the pipeline planned to be connected is spliced with the other end of the gate valve for mounting.

Description

technical field [0001] The invention relates to the technical field of subway construction, in particular to a construction method for cutting water supply pipes of different materials under pressure. Background technique [0002] In the construction process of the subway, it is often necessary to pass through residential areas. The construction area is close to residents and commercial buildings. The surrounding environment is complex and the underground pipelines are everywhere, which adds considerable difficulties to the pipeline relocation and construction of the subway in the early stage; The pipes are usually plain concrete pipes. If the traditional drilling, burying, and concrete encapsulation are adopted, the water supply will need to be cut off for several days. During this process, the daily drinking water of nearly ten thousand households will be affected. It is difficult to control, and it is very easy to cause problems such as water leakage and rupture of the ma...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a construction method for cutting water supply pipes of different materials under pressure, which solves the connection problem between pipes of different materials and effectively shortens the construction period; it can cut and connect the main water supply pipe without stopping Hose pressurized operation minimizes the adverse impact on nearby residents; flexible construction, convenient operation, wide application range, suitable for popularization and application

Images