ANTI-SEEPAGE SOFT PIT FOR PURIFYING SEWAGE USING MUD-MIXED CLAY IN KARST MOUNTAIN AREAS AND CONSTRUCTION METHOD THEREOF

The disclosure provides an anti-seepage soft pit for purifying sewage using mud-mixed clay in karst mountain areas and a construction method thereof. The anti-seepage soft pit for purifying sewage using mud-mixed clay in karst mountain areas includes a soil pit and a clay layer laid on the bottom of the soil pit, a mud-mixed clay layer thereon provided on the clay layer, and a water purification layer provided on the mud-mixed clay layer. The construction method of the anti-seepage soft pit for purifying sewage using mud-mixed clay in karst mountain areas of the present disclosure includes the following steps: A. laying clay on the soil pit l, and injecting water thereto, stirring and compacting to obtain a clay layer 2; B. laying a mud-mixed clay on the clay layer 2 to obtain a mud-mixed clay layer 3; C. sprinkling a water purification material evenly on the bottom of mud-mixed clay layer 3 to obtain a water purification layer 4; and D. sowing grass seeds on a side slope of mud-mixed clay layer 2. The anti-seepage soft pit according to the present disclosure has good anti-seepage effect, and thus could play a role of sewage treatment and slope care.