钠基膨润土防水毯在滹沱河防洪整治中的试验研究

Study on geosynthetic clay liner model test in the flood control comprehensive treatment project of Hutuo River

结合滹沱河防洪综合整治工程,对钠基膨润土防水毯建立试验模型,着重研究不同试验水头、外界环境条件(温度、风力等因素)对钠基膨润土防水毯的渗水量、水分蒸发量和渗透系数的变化规律。研究结果表明:试验水头与渗透系数成非线性关系,且渗水量随水位的增加而增加,渗透系数随水位的增加而减小。通过模型试验验证了钠基膨润土防水毯高密实、高防水等特点,为类似的防洪综合整治工程提供了技术支撑。

The test model of geosynthetic clay liner was built in the flood control comprehensive treatment project of Hutuo River. With the test model, the change lau of water percolating capacity, evaporation capacity and osmotic coefficient with different test head and external environmental conditions was emphatically studied. The results showed that with the increasing of water level, a non-linear growth of percolating capacity occurred and the osmotic coefficient presented a contrary tendency. The high dense degree and waterproof performance of geosynthetic clay liner was proved by a series of model tests, which provided technical support for the comprehensive renovation of flood control.