Torque measurement feature of in situ vane shear testing apparatus of earth

摘要

Topic The problem which until recently, peripheral surface frictional force of the rod, has had an influence on measurable quantity at the time of vane shear strength testing, by making the torque detector the vane be on line, is solved, the accurate measurement which does not receive the influence of peripheral surface frictional force of the rod regardless of to depth, is made possible. In addition, configuration was made easy with the structure which makes the angular board slide concerning the problem in regard to the manipulation which designates the position where torque occurs as 0 dots in seconds of arc.SolutionsIt consists of the torque detector of the same diameter as rotary rod 4 and the rotary rod of air in order to pull out its code to the ground, and the slide scale plate which reads angle of rotation. Choice figure Drawing 1