Testing device and testing method for gas-liquid seepage flow at lap joint of geosynthetic clay liner

• Main Authors: WAN JIALEI, DU YANJUN, LI SHUANGJIE, ZHUANG HENG, JIANG NINGJUN, LI YINGZHEN
• Format: Patent
• Language: Chinese; English
• Published: 29.07.2022
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a device and method for testing gas-liquid seepage flow at the lap joint of a geosynthetic clay liner, and the device comprises a top plate, an upper model box, a lower model box, a porous stainless steel clamping plate, a bottom plate, an oxygen sensor, a loading system and the like. The testing device can be used for testing the influence of the soil-water ratio, the overlapping width, the overlapping thickness, the pollution liquid concentration, the overlying stress, the hydraulic gradient and the air pressure difference of the bentonite overlapping paste on the gas-liquid seepage flow at the overlapping part of the bentonite waterproof blanket. Meanwhile, according to the testing method, the gas-liquid seepage flow, the time, the oxygen concentration and the final thickness, the height value and the water content of the geosynthetic clay liner are measured, and the test results of the geosynthetic clay liner under the conditions of no lap joint and lap joint are compared; the liqu