Pullout resistance of geo-cell placed as tensile reinforcement in backfill

在最近的土木工程应用中，土工织物、土工织物和土工格栅等加筋被用来对土结构的回填土进行拉伸加固。土工格室作为抗拉加固材料的应用十分有限，但在路堤、轻型房屋和交通等垂直荷载作用下，土工格室常常被用来抑制地基的水平扩展。土工格室的优点是可以容纳大颗粒的土工格室内，各个土工格室在横向拉力时具有较大的锚固能力。另一方面，常规类型的土工格室在横向拉拔时并不具有高的整体刚度。为了检验土工格室在加固挡土墙和地基等回填土时是否可以起到抗拉加固的作用，进行了一系列的室内试验，评估了布置土工格室模型的不同填土颗粒尺寸的小比例土工格室模型的抗拔性能。

Reinforcement, such as strips, woven-geotextiles and geogrids, is used to tensile-reinforce the backfill of soil structures in recent civil engineering applications. The use of geo-cells as tensile reinforcement has been quite limited, but geo-cells have been often used to restrain the foundation ground from horizontal spreading when subjected to vertical load by, for example, embankment, light-weight houses and traffic. Geo-cells have such advantages as that large-particles can be contained inside the cells and respective cells have a large anchorage capacity when pull laterally. On the other hand, conventional type geo-cells are not designed to have a high global stiffness when pull laterally. To examine whether geocells can be function as tensile reinforcing when used to reinforce the backfill of, for example, retaining walls and foundations, a series of laboratory tests were performed to evaluate the pull-out resistance of small-scaled models of geo-cell having different particle size of the backfill in which the geo-cell models were arranged.