Leakage repairing method for operated solid waste landfill anti-seepage system

The invention discloses a method for repairing leakage of an anti-seepage system of an operated solid waste landfill, which comprises the following steps of: drilling grouting holes: drilling a plurality of grouting holes in a leakage area to form a permeation channel; injecting an anti-seepage material, which comprises the following steps of: pre-blocking grouting: pre-blocking a seepage channel by using a polyurethane foaming agent; anti-seepage grouting is conducted, organic bentonite is injected, and a leakage channel is blocked; reinforcing grouting is conducted, acid-resistant cement paste is injected, and the supporting and reinforcing effects are achieved after solidification; according to the method, pre-blocking is conducted through the polyurethane foaming agent, seepage prevention is conducted through the organic bentonite, and finally reinforcing is conducted through the acid-resistant cement paste, the method can better adapt to the complex physical and chemical environment of the landfill site,