Installation and maintenance well at the junction of leachate drainage pipe and dam-piercing pipe and its construction method

Abstract

The invention discloses an installation overhauling well at the connecting position between a leachate guiding and discharging pipe and a dam penetrating pipe. The installation overhauling well at the connecting position between the leachate guiding and discharging pipe and the dam penetrating pipe comprises an installation overhauling well body, the leachate guiding and discharging pipe and the dam penetrating pipe, wherein the leachate guiding and discharging pipe and the dam penetrating pipe extend into the installation overhauling well body. The leachate guiding and discharging pipe and the dam penetrating pipe both penetrate through a bearing well wall of the installation overhauling well body and extend into a cavity of the installation overhauling well body. A liquid outlet of the leachate guiding and discharging pipe is in butt joint with a liquid inlet of the dam penetrating pipe in the cavity. The construction method of the installation overhauling well comprises the steps that a foundation pit is dug at the position close to the connecting position between the leachate guiding and discharging pipe and the dam penetrating pipe, and a reservoir bottom seepage-proof film layer, a clay layer and concrete well bottom plates are laid; the bearing well wall is built through bricks; the dam penetrating pipe is welded by adopting a method of welding two lines of single rails; a flexible connecting film is used for covering the sweat soldering connector of the dam penetrating pipe and the liquid outlet of the leachate guiding and discharging pipe, a flexible wrinkle section of a certain length is reserved on the flexible connecting film, and construction is completed. According to the installation overhauling well at the connecting position between the leachate guiding and discharging pipe and the dam penetrating pipe and the construction method, the working stability of the leachate guiding and discharging pipe and the dam penetrating pipe can be guaranteed, and construction and overhauling in a later period are facilitated.

Description

technical field [0001] The invention belongs to the technical field of arrangement structure and construction of a solid waste treatment site, and in particular relates to an installation maintenance well at the junction of a leachate guide pipe and a dam-piercing pipe and a construction method thereof. Background technique [0002] In recent years, in order to reduce the environmental pollution caused by municipal solid waste, cities above the county level have successively invested a large amount of funds in the construction of domestic waste sanitary landfills to replace the previous simple landfills. Among them, anti-seepage in the reservoir area, leachate collection and drainage system, and leachate treatment system are important components of the harmless municipal solid waste sanitary landfill, and the anti-seepage effect directly affects the harmless treatment effect of domestic solid waste. After a sampling survey, it was found that after more than 90% of the landfi...

AI Technical Summary

Problems solved by technology

[0004] (1) The working space around the 360° circular welding construction of the dam piercing pipe is not considered; the narrow working space makes it difficult to weld the side of the dam piercing pipe close to the foundation cushion of the reservoir bottom, and the interface near the foundation cushion of the reservoir bottom is often not welded firmly or In place, welding quality is difficult to guarantee

[0005] (2) The difference in shear force at the connection between the dam-piercing pipe and the leachate drainage main pipe at the bottom of the reservoir is not considered

With the continuous increase of the garbage pile, there will be significant differences between the settlement change of the reservoir bottom and the settlement change of the garbage dam, which will lead to deformation and fracture at the interface between the leachate drainage pipe at the bottom of the reservoir and the dam piercing pipe. The continuous entry of garbage will block the dam pipe, and in severe cases, the leachate drainage system in the entire reservoir area will be scrapped

[0006] (3) The existing design is not convenient for inspection and maintenance in the operation stage

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