METHOD OF FORECASTING IMPROVEMENT EFFECT BY BLASTING COMPACTION

摘要

PROBLEM TO BE SOLVED: To forecast a soil improvement effect by taking into consideration ground conditions and blasting specification conditions, and to thereby set blasting specifications with high accuracy.;SOLUTION: A water impact ratio U_d/σ_V' is estimated from a relationship utilizing the fact that the water impact ratio U_d/σ_V' and a scale distance D/W^1/3 that is obtained by dividing a distance D from a blasting location by a cubic root of a charged quantity W per stage are set in a logarithmic proportionality, and an excessive neutral pressure ratio U_r/σ_V' is estimated from a relationship utilizing the fact that a cumulative water impact ratio ΣU_d/σ_V' and the excessive neutral pressure ratio U_r/σ_V' are set in a proportionality. Then the increasing magnification of a corrected Na value before and after the soil improvement is estimated from an estimated value of the excessive neutral pressure ratio U_r/σ_V', and thus the soil improvement effect is forecasted.;COPYRIGHT: (C)2007,JPO&INPIT