Method for applying horizontal directional drilling to refuse landfill leachate drainage

Abstract

The invention discloses a method for applying horizontal directional drilling to refuse landfill leachate drainage. The method comprises the steps that a drill hole of K meters is drilled in the part, in a preset low-point position of a side slope of a refuse dam, of a refuse dump body by a horizontal directional drilling rig, a leachate guiding pipe is carried by a drill bit of the horizontal directional drilling rig to enter the drill hole and enter the refuse dump body along with the drill bit, and finally a leachate drainage channel is formed; and the pipe body, located within the range from the front end to the position away from the front end of the leachate guiding pipe by S meters, of the leachate guiding pipe is of a floral pipe structure wrapped with geotextile, grooves are formed in the two sides and the top of the floral pipe structure at intervals, wherein S is smaller than K. According to the method for applying horizontal directional drilling to refuse landfill leachate drainage, the horizontal directional drilling technology is introduced into the field of refuse landfill leachate drainage and combined with the refuse landfill leachate drainage technical characteristics, so that an artesian leachate drainage facility is formed, the phreatic line is effectively lowered, and drainage consolidation of stockpiling refuse is facilitated; and the method has the advantage of being easy and convenient to construct, low in manufacturing cost and the like.

Description

technical field [0001] The invention relates to the field of drainage of municipal solid waste landfills, in particular to a method for horizontal directional drilling applied to drainage of leachate in garbage landfills. Background technique [0002] The landfill is a place where domestic waste is disposed of in a sanitary landfill, and geotechnical materials are often used for anti-seepage. The landfill waste disposal method is the main waste disposal method in my country because of its low cost and good sanitation conditions. According to the requirements of the industry standard CJJ-17, domestic waste landfills in my country should be provided with a diversion layer and blind ditch as a leachate collection system to discharge leachate from the landfill or due to rainfall. However, as the service life of the landfill increases, the drainage function of the leachate infiltration facilities at the bottom will continue to decline, and even blockage will occur, resulting in ...

AI Technical Summary

Problems solved by technology

In addition, the excavation of horizontal infiltration blind ditch is relatively large

This will result in a large amount of engineering for horizontal infiltration plus pumping and drainage shafts, which will take a long time and be expensive

[0005] 2. The pumping shaft needs to be pumped continuously, so the operating cost is high and energy consumption is high

[0006] 3. The excavation of the horizontal infiltration blind ditch and the pumping and drainage shaft will affect the garbage body and the surrounding environment. There are gaps around the shaft for cleaning and diversion and gas collection. During the construction period, the stability of the pile and the surrounding environment may also be damaged sex, there is a security risk

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