中文摘要：

针对植物根-土复合体室内剪切试验时产生土体振动而导致试验精度不高的问题,在分析实际试验过程的基础上,提出了更接近实际剪切状况的野外现场原位试验方案,设计了一种植物根-土复合体原位剪切试验装置,采用电动拉杆带动专用卡具进行剪切,通过数据采集系统测出剪应力与剪切位移。制成的剪切试验装置主要由机架、固定卡具、拉拽机构和数据采集系统组成。受力分析及试验表明：该装置满足使用要求,为今后各类根-土复合体原位剪切试验装置的应用提供了参考。

英文摘要：

Plant root soil complex indoor shear test on the generated soil vibration and lead to the problem of testing accu- racy is not high in the analysis based on the actual test, the more close to the actual situation in the shear field in situ test scheme, design a plant root - soil complex fit in-situ shear test device, using electric pull rod drives the special fixture for shear, shear stress and shear displacement can be tested through the data acquisition system. Shear test device is made mainly by the rack fixture, pulling mechanism and data acquisition systems. By means of force analysis and experiment, it is indicated that the device meets the application requirements, and provides reference for the application of the in-situ shear test device of various types of root soil composite in the future.