A method and system for setting up blind ditches for leachate stratification and drainage in landfills

Abstract

The invention relates to a setting method for a percolate layered guide and discharge blind ditch system. The setting method comprises the following steps of: (1) forming a guide and discharge blind ditch in the bottom of a first layer of refuse while filling the first layer of refuse in a layered filling operation process; forming a guide and discharge blind hole in the surface of a N-th layer ofrefuse when a (N+1)-th layer of refuse is filled, wherein N is greater than and equal to 1, and the tail end of the guide and discharge blind hole extends to the edge of a landfill operation area, and percolate is finally collected into a percolate collecting system on the side edge of a landfill area; (2) while setting the blind ditches in layers, enabling spacing between the same layer of adjacent ditches to be 30-40 meters, wherein length and gradient of the ditches are determined according to a landfill operation surface; (3) after ditch forming is completed, spreading an HDPE film on thebottom and the side wall of each ditch, and expanding the HDPE film to the two sides above the corresponding ditch, and compacting with refuse; and (4) filling grait in the ditches spread with the HDPE films. The invention further discloses the percolate layered guide and discharge blind ditch system. The setting method is simple in process and is low in cost; blind ditches are set without influences of layer height; and the set blind ditch system can timely discharge percolate.

Description

technical field [0001] The invention relates to the technical field of waste landfill seepage drainage, in particular to a setting method and system for leachate layered guiding and draining blind ditches in waste landfills. Background technique [0002] At present, the domestic large and medium-sized domestic waste landfills are mainly valley-type landfills, and the scale of the site is relatively large. The main drainage pipes installed in the landfill are determined according to the geographical location, and the length is relatively long. Therefore, when setting In the case of seepage pipes, the combination of main seepage pipes and branch seepage pipes in the central area of ​​the garbage dump will be considered, and some leachate collection and drainage ditches will be set at the edge of the auxiliary garbage dump. However, due to the long length of the main drainage pipes of large landfills, the total length may reach more than 1Km, so the landfill height under the se...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the setting of the blind ditch in the prior art is affected by the height of the garbage dump, the leachate from the garbage dump cannot be discharged in time, the setting of the blind ditch is expensive, and the blind ditch pipeline is easy to block, bend or To solve the technical problem of fracture, provide a method and system for setting up blind ditches for leachate layered guiding and drainage, which is mainly used for garbage dumps with different heights in landfills, especially for garbage that cannot be installed due to the influence of slope in the dominant seepage blind ditch In the pile area, adopting the layered blind ditch method of the present invention can effectively improve the function of leachate collection and drainage

Images