Construction method of gas collection well for landfill gas diversion

Abstract

The invention discloses a construction method of a landfill gas conduction drainage gas collection well, which comprises the following steps: 1) using a pilot cone as the working head at the selected position of the garbage pile, applying pressure on the pressure bearing surface, and turning the process The opening part is gradually pressed into the garbage dump until the first length is left outside the garbage dump; 2) Pulling force is applied to the anti-push surface to pull the process opening part out of the garbage dump to form a foundation hole. The pressure direction is opposite; 3) Put the well pipe down into the base hole until the nose cone contacts the bottom of the base hole, apply pressure to the flange, and press the well pipe into the garbage dump until the second length of the well tube is outside the garbage dump , there is a filling space between the well pipe and the foundation hole; 4) Fill the filling space with gravel to a given distance from the opening of the foundation hole, and the given distance determines the sealed space; 5) Fill the sealed space with soil, press Reality. The construction method according to the invention is easy to ensure the construction quality and the well pipe is easy to recover.

Description

technical field [0001] The invention relates to a construction method of a landfill gas conduction drainage gas collection well. Background technique [0002] At present, the main way of domestic waste disposal in my country is to landfill in designated places, and almost all urban domestic waste is disposed of by landfill. According to whether the engineering measures are complete and the environmental protection standards can be met, the landfills can be divided into simple landfills, controlled landfills and sanitary landfills. The landfills capable of collecting landfill gas are mainly the latter two landfills. [0003] Landfill will form a relatively large garbage dump. The domestic garbage in the garbage dump will rot and ferment due to its organic components and produce a large amount of gas. These gases are collectively called landfill gas. Landfill gas production has a certain law, which can be used to process and use landfill gas by digging gas-gathering wells on...

AI Technical Summary

Problems solved by technology

However, in this patent document, it is difficult to form the required annular space outside the well pipe with a simple conical extrusion head.

In addition, because the bottom diameter of the conical extrusion head is larger than the diameter of the well pipe, it is essentially equivalent to an anchor head, and the well pipe is difficult to recover

As mentioned earlier, some gas gathering wells may fail in a relatively short period of time, and well pipes that cannot be recovered will generate unnecessary waste

Images