磁気層別沈下計の開発とその適用性に関する研究

抄録

The new method of measuring settlement using one bore hole which has enable the increase of measuring points during observation were developed. The principle of this method is based on two unique points, one of which is application of a permanent magnet as an indicator of settlement, and the other is the exploitation of semi-conductor magneto-resistance elements for detecting the magnetic fields. In advance of the observation, the magnets are forced into the earth penetrating the VINYL CHLORIDE casing of bore hole by the oil jack at suitable depths and intervals, and the small sized magneto-resistance element is much use of realization of this idea.
In this paper, the principles of this method, measuring procedure, the special characteristics and potential of this system and the results of field trials are described.