Construction method for blocking water bags of gravity running water pipeline

Abstract

The invention provides a construction method for blocking a water bag of a gravity flow pipeline, which is characterized by comprising the following steps of: 1, selecting a well chamber to be blocked; 2, physical exploration is conducted on the well chamber needing to be plugged; thirdly, the well chamber needing to be blocked is cleaned; fourthly, a plugging water bag is manufactured; 5, the plugging water bag is placed in the well chamber on the ground, water is injected into the plugging water bag to enable the plugging water bag to expand, the water head pressure generated by the upstream of the plugging well position is resisted by adjusting the water level height in the plugging water bag, the plugging water bag is made to be tightly attached to the pipe opening of the rain sewage pipeline, and the plugging water bag is made to be tightly attached to the well wall of the well chamber; and 6, after related operation in the target pipe section is completed, the plugging water bag is slowly pumped dry, and the plugging water bag is taken out. The defects that a traditional air bag is poor in adaptability, high in air pressure control requirement, multiple in-well underwater operation unsafe factors and the like are overcome, cost is low, and operation is easy.

Description

technical field [0001] The invention relates to the technical field of rain and sewage pipeline construction, in particular to a construction method for water bag plugging of a gravity flow pipeline. Background technique [0002] At present, the existing gravity flow rain and sewage pipeline sealing device generally adopts the water blocking air bag. The working principle of the water blocking air bag is to use the pipe sealing air bag made of high-quality rubber to inflate it by inflating it. When the gas pressure in the water blocking air bag reaches the specified requirements, the water blocking air bag fills the entire pipeline section, and the water blocking air bag is used The frictional force generated with the pipe resists the head pressure, so as to achieve the purpose of blocking the target pipe section. [0003] To use the water blocking air bag, you must first find out the diameter of the current pipeline. The water blocking air bag product should be compatible ...

AI Technical Summary

Problems solved by technology

[0003] To use the water blocking air bag, you must first find out the diameter of the existing pipeline. The water blocking air bag product should be compatible with the inner diameter of the pipe, and the cost is high and the adaptability is poor.

However, in the case of a high water level in the current rainwater well, it is impossible to directly determine the inner diameter of the pipeline and the distribution of the pipeline in the well

The use of water blocking airbags requires extremely high material and air pressure control. If the pressure is too high, it will burst easily, and if the pressure is too low, it will easily slip.

[0004] In addition, to use traditional water blocking air bags in wells with high water level or poisonous gas, it is necessary to hire professional frogmen to go down the well to clean the nozzle and complete the plugging operation, which is expensive and has many unsafe factors

Especially in the case of deep rain and sewage pipeline wells, large water flow or undercurrent, underground operations are extremely dangerous

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