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用梯度比试验来判别土工织物的淤堵性能时,由于试验对土工织物的实际工作条件作了很大简化,并且其试验结果(梯度比值GR)对土体和土工织物在水流作用下的变化不太敏感,因而判断结果并不理想。为了使梯度比试验在判别土工织物淤堵时更加有效,研究人员对梯度比公式进行了修正,并在试验中加入了织物的受拉、反滤系统的受压、往复水流、动荷载、砂砾层对渗流的阻碍这些外在因素,同时阐述了这些因素作用下土工织物的防淤堵机理。
Gradient ratio test to determine the clogging performance of geotextiles, the actual working conditions of geotextiles as a result of the test was greatly simplified, and the results of the test (gradient ratio GR) of soil and geotextile changes in water flow Less sensitive, so the result is not satisfactory. In order to make the gradient ratio test more effective in judging the clogging of geotextiles, the researchers revised the gradient ratio formula and added the tension of the fabric, the pressure of the filtration system, the reciprocating water flow, the dynamic load and the gravel Layer of seepage flow impede these external factors, at the same time described the geofabric anti-clogging mechanism under these factors.