| 摘要 |
PURPOSE:To survey the ground to which a ground injection work method is performed, by connecting a cone penetration testing device, a neutron moisture meter, and an electric logging device to a rod shape. CONSTITUTION:The titled instrument is constituted by connecting to a rod shape a cone penetration testing device 1 for pressing an oil chamber by a movement in the axial direction of a tip cone of a conical shape, and for detecting oil pressure in the oil chamber by a pressure detector, a neutron moisture meter 2 for measuring by a neutron counter the number of thermal neutrons by which a high speed neutron generated from a high speed neutron source of calpholnium 252, etc., is decelerated by water, for measuring the moisture content in the ground, and for estimating an injection state by mixing a substance (Li, B, Cl, Mn, Cd, etc.) whose thermal neutron absorbing cross section is large into an injecting material, and an electric logging device 3 for measuring a specific resistance of a stratum by a current flowing from one point of the surface of the ground by using several pieces of electrodes exposed and provided at a prescribed interval on the cylindrical axial part. In such a way, a ground survey instrument for surveying the ground to which a ground injection work method is performed. |
