爆炸法密实饱和砂的模型试验研究

装药重量、装药形式、装药的深度是爆炸法密实饱和砂地基设计中比较敏感的设计参数。为研究上述参数对加固密实效果的影响,本文进行了爆炸法密实饱和砂的模型试验;共进行了6组试验,其中2组为集中装药形式,其它4组为分层间隔装药的形式。测量了孔隙水压力的增长和消散、地表沉降和静力触探值的变化,分析得出分层间隔装药形式更有利于地基加固处理的效果,且分层间隔装药时,药包布设使得爆炸向土体释放的能量分布越均匀,其加固处理的效果就越好。

A Laboratory Study of Explosive Compaction of Saturated Sand

Explosive compaction(EC) has not attained wide acceptance despite the attraction of low cost and ease of treating large depths,due to lack of an empirical design approach unrelated to theory.The charge weight,charge placement(in profile) and depth of charges are important factors in design of explosive compaction for saturated loose sand.Six laboratory tests have been conducted to investigate the potential of charge weight,charge placement(in profile) and depth of charge in blast densification,concentrated charge has adopted in two of them,the others are decked or tiered charges.Variation of pore-water pressure,cone penetration tests and surface elevation changes were measured.The results of laboratory tests prove the decked and tired charges are more effective for ground treatment in explosive compaction,the more uniform distribute of energy input,the more effective of ground treatment.