土工格室结构层拉伸性状试验研究

Model Test for Elongation Behavior of Geocell Structural Layer

应用自行设计的拉伸装置,选用黄土和砂两种填料,并通过片材应变值的测试,开展了土工格室结构层拉伸性状研究,得出了两种不同填料的拉伸特性和拉伸变形规律。结果表明,土工格室结构层拉伸破坏均发生于固定端(作用端)处,焊点强度是其主要控制因素,且土工格室砂结构层拉伸强度远大于黄土结构层;土工格室结构层片材的拉伸应变曲线明显地表现为界面摩擦作用、格室受拉和破坏3个阶段。

Adopting the self-made stretching device and applying the test of material strain gauge, the stretching behavior of geocell structure is studied on the stretching characteristics and deformation pattem with two different fillings, including loess and grit.The research result displays that the breakage of geocell structure occurs at the fixed point （point of action）, and the intensity of welding point is the main controlling factor. The intensity of geocell structure filled with grit is greater than the geocell structure with loess. The curve of stretching strain of geocell behaves obviously the following three phases, i.e. interfacial friction, geocell material stretched and breakage.