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.
A water impact ratio Ud/σV' is estimated from a relationship utilizing the fact that the water impact ratio Ud/σV' and a scale distance D/W1/3 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 Ur/σV' is estimated from a relationship utilizing the fact that a cumulative water impact ratio ΣUd/σV' and the excessive neutral pressure ratio Ur/σV' 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 Ur/σV', and thus the soil improvement effect is forecasted.
NAGAO KOICHI
TSUJINO SHUICHI
| JPH11181754A | 1999-07-06 | |||
| JPS4982119A | 1974-08-07 | |||
| JP2005232715A | 2005-09-02 |