卫生填埋场室内离心模拟试验研究

Laboratory centrifugal simulation experiment on landfill

用离心试验法模拟了填埋体的沉降和边坡土工膜的应力应变状态,并将其与有限元计算结果进行了对比.结果表明:该方法可以定性地描述出卫生填埋场现场的状况;边坡土工膜存在初始损伤的情况下发生的应力集中是导致其受拉破坏的主要原因;保证边坡防渗层安全的关键是加强现场管理与监督,提高土工膜铺设工艺.

The settlement of wastes and the stress and strain status of geomembranes on a landfill slope were simulated by centrifugal experiments, and the results were compared with those of FEM calculation. It is indicated that the present method can give a qualitative description of the status of the landfill, and that the main reason for tensile failure of geomembranes is the concentration of stresses caused by the initial damage to membranes. Therefore, the strengthening of field management and supervision and improvement of paving technique are vital to the safety of impervious layers