模拟现场工况条件下的无纺布淤堵试验研究

通过对荆江长河段航道整治护坡工程的结构形式及其中常用的短纤针刺非织造土工布进行调研,针对反滤层中无纺布潜在的淤堵问题及其对岸坡稳定性的影响进行分析,研制了模拟现场工况条件的土工合成材料淤堵试验仪,分别将水力梯度、垫层砂厚度、砂的粗细、土质类别及无纺布孔径单一因子对无纺布淤堵的影响进行试验分析,探讨各因子对无纺布淤堵的影响规律。

Clogging tests study on non-woven fabrics under simulated on-site operating conditions

Through the investigation and research on the structural type of the slope protection project and the staple acupuncture non-woven geotextiles in the Jingjiang section of the Yangtze River,this paper analyzes the potential clogging problems of non-woven fabrics in the filter layer and its effect on slope stability.The geosynthetics clogging tester is developed to carry out a series of non-woven clogging test,which is under the working conditions of simulated field.The effects of hydraulic gradient,sand thickness,sand fineness modulus,soil type and non-woven pore size on the clogging of non-woven fabrics are analyzed.The influence rules of factors of non-woven fabric clogging are discussed.