Construction management manner null of dynamical pressure dense

摘要

PURPOSE:To enable a soil improvement condition to be always comprehended over a wide area by sending subsoil improvement data such as hammer acceleration, hammer penetration amount and hammer dropping height from a dynamic consolidation device to a group control center via a radiowave system at all times, and causing the group control center to receive and process the data from a plurality of dynamic consolidation devices. CONSTITUTION:Impact acceleration, upon the fall and contact of a hammer 5 with the ground, is detected with an acceleration sensor 9. Then, a detected weak signal is inputted to an acceleration transmission unit 11, and data is stored in memory. Upon completion of data storage, the power supply of a detected signal system connected to the acceleration sensor 9 is turned off, and the power supply of a signal transmission system connected to a transmission antenna 12 is turned on, thereby causing the antenna 12 to transmit the acceleration signal stored in the memory. The acceleration signal transmitted from the acceleration transmission unit 11 is received by a receiving device in the group control center.