锻锤振动对深基坑支护桩设计的影响

FORGING HAMMER VIBRATION INFLUENCE OVER DESIGN OF RETAINING PILE OF BRACING OF DEEP FOUNDATION PIT

通过对锻锤生产时地面振动加速度的实际测试 ,表明锤击振动加速度近于Ⅷ级地震烈度时 ,深基坑支护桩的最小入土深度和截面的最大弯矩 ,要比停产无振动时均大于 30 %以上 ,振动影响十分显著。

Taking a practical determination of accelerati on of land surface vibration while forging hammer working,which indicates that a cceleration of land surface vibration approximated to 8 level intensity,the minim um entrancing earth deepness of retaining pile of bracing of deep foundation pit and maximal bending moment of cross section will be more than thirty percent of that of no vibration when no work,so the influence is very obviously. \[