论文部分内容阅读
研制了一台新型可视自动采集数据的土工拉拔试验装置,可用于多种土工材料和填料作用下的拉拔试验。该装置改进了加载系统和反力系统,实现了拉拔界面的可视与数据采集的自动化,并可量测土工材料不同嵌固长度处的位移,获取土工材料变形值,探索筋土作用过程中筋材受力机理及界面土体位移变化规律。使用新研制的试验装置开展了以砾类粗粒土为填料的格栅拉拔试验,结果表明:上覆荷载增大,土中格栅的应变变小,土体与格栅的界面摩擦和嵌固作用越显著;筋土界面处土体颗粒存在平移及转动两种运动模式,且界面处土体形成稳定的位移集中带。
A new type of geotechnical drawing test device for automatic data acquisition was developed. It can be used for drawing tests under various geotechnical materials and fillers. The device improves the loading system and the reaction force system, realizes the automation of the visualization and data acquisition of the drawing interface, and can measure the displacements at different embedding lengths of the geotechnical materials, obtain the deformation values of the geotechnical materials, The mechanism of medium tendon stress and the variation of interface soil displacement. The newly developed test device was used to carry out graphene drawing test with gravelly coarse grained soil as filler. The results show that: the overburden increases, the strain of geogrid in soil becomes smaller, the interfacial friction between soil and gravel and The more significant the effect of embedding. The soil particles in the soil-soil interface have two modes of motion of translation and rotation, and the soil forms a stable displacement concentrated zone at the interface.