Method for blocking large-pipe-diameter rainwater pipeline through short air bag

Abstract

The invention discloses a method for blocking a large-pipe-diameter rainwater pipeline through a short air bag. The method includes the following steps that firstly, the pipeline is strengthened, and a foundation pit is excavated; secondly, impurities are removed; thirdly, the short air bag is arranged, and fixing is firm; fourthly, the short air bag is connected with an air compressor; fifthly, a three-way air valve is checked; sixthly, pressurizing and inflating are conducted; seventhly, sealing is achieved; eighthly, after work is completed, the three-way air valve is adjusted, and exhausting is conducted; ninthly, the short air bag is pulled out. According to the method for blocking the large-pipe-diameter rainwater pipeline, the short air bag is used for blocking the drain pipeline, the problems that that great danger exists in the brick wall detaching work, blocked residues can be hardly removed thoroughly, rubbish mixed in fluid in the pipeline may block the pipeline, and the use safety of the pipeline is affected are solved, the purchase cost and the use cost are saved, the time cost of the construction progress is saved, various costs are reduced, the construction cost is reduced, the economic benefits are improved, underground unmanned work is achieved, the safety of workers is ensured, and the construction period is shortened.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a method for blocking large-diameter rainwater pipes by using short airbags. Background technique [0002] At present, some domestic manufacturers have produced airbags suitable for pipeline sealing. Airbags are easy to operate and low in price, so they are widely used in urban pipeline sealing. However, the size and weight of the large-diameter blocking airbag are often too large, which increases the difficulty of storage, transportation and use. Since the blockage relies on the tight combination of the air bag and the inner wall of the pipe to block the flow of water, when the water pressure is greater than 3 meters, the friction between the air bag and the pipe wall cannot completely resist the external water pressure. In order to increase the friction, the manufacturer had to increase the length of the blocking airbag, but the overly long airbag made it more difficult to...

AI Technical Summary

Problems solved by technology

Since the blockage relies on the tight combination of the air bag and the inner wall of the pipe to block the flow of water, when the water pressure is greater than 3 meters, the friction between the air bag and the pipe wall cannot completely resist the external water pressure

In order to improve the friction, the manufacturer had to increase the length of the blocking airbag, but the overly long airbag made it more difficult to use