METHOD FOR MEASURING GROUND VIBRATION VELOCITY,申请号JP20050327688-传众专利搜索

METHOD FOR MEASURING GROUND VIBRATION VELOCITY

申请公布号：JP2007132854(A)

申请号：JP20050327688

申请日期：2005.11.11

申请公布日期：2007.05.31

申请人：

EARTH TECT:KK;NAKAGAWA RYOSUKE

发明人：NAKAGAWA RYOSUKE

分类号：G01V1/147;E02D1/00;G01N29/00

主分类号：G01V1/147

摘要：PROBLEM TO BE SOLVED: To provide a ground vibration velocity measuring method capable of applying vibration by the same condition to a plurality of points of measurement, and obtaining uniform surface-wave survey results concerning the plurality of points of measurement. SOLUTION: A weight pulled up from a ground surface up to a predetermined height is allowed to fall freely and collide with the ground surface. Then a surface wave generated by that collision propagates radially through the ground in all peripheral directions from a vibration generation source 4. A pair of vibration sensors 11, 12 are installed beforehand at each point of measurement M1-M4 respectively. A surface wave having reached each point of measurement M1-M4 is detected by each pair of vibration sensors 11, 12 respectively. For each point of measurement M1-M4, a propagation velocity (phase velocity) Vrm is computed, from a relational expression (Vrm=L/T) between the distance L between each pair of vibration sensors 11, 12, and a time duration T which the surface wave requires to pass that distance L. COPYRIGHT: (C)2007,JPO&INPIT