Construction management manner null of in situ earth churning

摘要

PURPOSE: To sufficiently cover mixing in the radial direction of a drilled hole by controlling the mixing/stirring condition of drilled soil with cement milk by means of the detected signal from a cement milk concentration measuring machine in the use of a stirring machine. ;CONSTITUTION: Drilled soil by means of a plurality of stirring wings 3 provided on the kneading shaft 2 of a stirring machine 1 is mixed and stirred with a solidifying agent such as cement milk supplied from the ground through the inside of the kneading shaft 2. An underground wall is formed from soil mortar produced in this way. The stirring wings 3 is provided with a cement milk concentration measuring device 4, and the detected signal from the device 4 is transmitted to the ground by means of a transmission cable 5. The signal is data-processed in a computing device 13 together with the related signals from a flow meter 15, a depth detector 16, a leader inclinometer 17, and the like, and the result is displayed on a display device and recorded/ stored in a recording device 18. Further, cement milk concentration is computed, the pouring quantity of cement milk, drilling speed, stirring speed, and the like are adjusted so as to control the mixing/stirring condition of drilled soil with cement milk.;COPYRIGHT: (C)1994,JPO&Japio