爆炸密实饱和粉细砂地基中孔隙水压力的增长和消散

爆炸密实法处理饱和粉细砂地基的现场试验中,对爆炸过程中的孔隙水压力进行了实测。通过分析研究孔隙水压力的变化特性,发现孔隙水压力的增长和消散具有独特的规律性。研究表明,孔隙水压力的变化与炸药量、传感器至装药孔的距离、起爆方式有关。在爆炸密实的饱和粉细砂中,孔隙水压力消散很快,30min左右就消散95%以上。

INCREMENT AND DECREMENT OF PORE-WATER PRESSURES IN EXPLOSIVE COMPACTING OF WATER-SATURATED FINES SAND GROUND

In the site tests of which the explosive compacting is used for treatment of water-saturated fines sand ground,the pore-water pressures at the moment of explosion are measured.Through studying the change of pore-water pressures,the laws of increment and decrement of pore-water pressures are discovered.This study shows that the change of pore-water pressures is relative to charge mass,sensor-to-charged hole distance and initiation mode.In the explosive-compacted water-saturated fines sand,the pore-water pressures decrease quickly,declining to 95% of the original pressure within about 30 minutes.