Abstract
In bends of pressure pipelines such as agricultural pipelines, unbalanced force called thrust force acts depending on the internal pressure and the bending angle. Although thrust blocks made of concrete are generally placed on the bends to prevent bends from moving, the heavy thrust blocks cause separation of joints during earthquake. In this paper, lateral loading experiments with a lightweight thrust restraint method using gravel and geogrids were conducted in dry sand. As a result, it was revealed that the dimension of the thrust restraint clearly affects the additional resistance in the large displacement. In addition, the shear plane on the passive area could be approximated by a wedge shape.
