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    • 81. 发明专利
    • METHOD AND DEVICE FOR UNDERGROUND CAVITY SURVEY
    • JP2003130641A
    • 2003-05-08
    • JP2001322253
    • 2001-10-19
    • KAWASAKI GEOL ENGINEERING CO L
    • FUJIWARA MORIMITSU
    • G01C7/06G01C15/00
    • PROBLEM TO BE SOLVED: To provide a method and a device for underground cavity survey capable of obtaining sufficient information on survey with safety, and also three-dimensionally seeing the picture inside the cavity as a result of analysis. SOLUTION: The underground cavity survey method makes boring up to the underearth cavity location, slowly lets a sonde for radiographic measurement equipped with at least one still camera downward from the boring hole. When the sonde has entered the underearth cavity, the method rotates the sonde to do a photo shoot inside the cavity for a certain direction as well as measure the depth in shooting and the distance to the sidewall of the cavity in the shooting direction at the depth. Additionally the device for underground cavity survey is provided with an electric winch, a controller unit, a monitoring television, the sonde for radiographic measurement to be elevated within the boring hole by the electric winch through a cable, the still camera taking a picture inside the underearth cavity, a direction finder, and a range finder measuring the distance to the sidewall in the cavity.
    • 87. 发明专利
    • MEASURING APPARATUS FOR INSIDE SHAPE OF TUNNEL
    • JP2001255144A
    • 2001-09-21
    • JP2000064435
    • 2000-03-09
    • TECHNICAL SYST KK
    • TSUCHIYA TAKESHI
    • G01C7/06G01B11/24
    • PROBLEM TO BE SOLVED: To provide a measuring apparatus, by which when the inside shape of a tunnel H is measured by using an optical distance measuring means, coordinate data which are necessary and sufficient for grasping the inside shape of the tunnel H can be acquired automatically and in as short a time as possible. SOLUTION: A rotary distance-measuring instrument 2 is supported on an automatic rotating stage 3. Pulsed light is projected, so as to be turned around a rotation axial line β in the horizontal direction. Whenever its projection direction is turned about the rotation axial line β by a prescribed number of times, the measuring instrument 2 is turned about a vertical axial line α. While the measuring instrument 2 is turned by an angle range of about 180 deg., distances up to measuring points P are measured in each prescribed period by the measuring instrument 2. Coordinate data on many measuring points P are measured for substantially all directions in the circumference of a measuring device A. Coordinate data on a plurality of measuring target points Pt which are set, so as to keep prescribed intervals on the inside wall of a virtual tunnel medal h are prepared in advance. Only the coordinate data close to the set target points are selected from among the coordinate data on the measuring points P.