Construction method of water supply pipeline

Abstract

The invention relates to a construction method of a water supply pipeline. The construction method comprises the following steps of 1, setting out and line inspecting; 2, trench excavation; 3, pipeline mounting; 4, carrying out a pipeline experiment and a leakproofness experiment; 5, pipeline backfilling; and 6, inspection well periphery backfilling. The construction method has the beneficial effects that the experiment period of a water supply pipeline pressure test can be effectively shortened, and the cost of the test can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of pipeline construction, in particular to a water supply pipeline construction method. Background technique [0002] According to the provisions of Article 9.1.9 of the "Code for Construction and Acceptance of Water Supply and Sewerage Pipeline Engineering" (GB50268-2008), the segmental length of the water supply pipeline hydraulic test should not be greater than 1000m. However, in the construction process of large-diameter water pipelines, the construction length of a bid section or a project pipeline is often relatively long. In the construction process, we often use 1000m as a construction section, or according to the actual situation on site, we intentionally divide the large-diameter water supply pipe of about 1,000 meters into two sections for construction, so it must comply with (GB50268-2008) 9.1.9 According to the regulations, we have to carry out multiple pressure tests on the new pipeline, and t...

AI Technical Summary

Problems solved by technology

It is extremely uneconomical from an economic point of view to keep the excavator on the construction site waiting for excavation or to re-enter the site (the excavator may have left the construction site at this time). It usually takes 7-10 days to complete the pounding), therefore, if manual excavation is used, due to the small construction area in this section, no amount of manual work can be performed. Taking the four types of soil as an example, excavation It takes about 3.5-5 man-days to manually remove the unreinforced concrete. In addition, the cost of raw materials for the concrete between the two construction sections, the curing period of the concrete, and the cost of the concrete The indirect economic cost and labor cost added to the construction unit by demolition, as well as the cost of transporting the demolished concrete to the garbage plant are also relatively expensive. Water leakage has left a great hidden danger for the safe and normal operation of this section of the pipeline in the future

Because first, the connecting pipes that were flashed out for pound pressure were not tested for pound pressure

Secondly, the construction time of the two construction sections is generally not at the same time. Therefore, it is difficult to ensure that the horizontal and vertical positions of the two sections of pipelines constructed before and after the construction are consistent, which increases the leakage of some pipelines that have not been pounded. possibility

If there is a big difference between the horizontal and vertical positions of the two pipelines, in order to ensure a better connection of the pipelines, the installed pipelines have to be removed, and longer pipelines are used for leveling or slope finding, which again causes engineering problems. Delay in construction period

Third, since there is a section of trench that was not excavated at the same time, it is difficult to directly connect with fixed-length pipes without cutting the pipes to find the distance when connecting the pipes, which increases the loss of materials and prolongs the connection time , the labor intensity of the interface is high