摘要
迄今爆炸密实法应用于地基处理已有70多年的历史,尽管爆炸法处理地基以其快速、经济、简单、处理深度深的特点为人们所认可和推崇,但由于设计方法和理论的不完善,这一方法没有得到广泛的应用。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,进行了以雷管作为爆炸密实动力源,单孔装药的模型试验。共进行了6组试验,其中2组为集中装药形式,其他4组为分层间隔装药的形式。通过量测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,加固处理的效果就越好,但对能量的分布均匀仅是定性的评价,尚无定量的指标进行评价。
Although used for over 70 years, explosive compaction（EC） has not attained widespread acceptance despite the attraction of low cost and ease of treating large depths, due to empirical design approach without solid theoretical basis. 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 are conducted to investigate the effect of charge weight, charge placement （in profile） and depth of charge on densification, two of which are concentrated charge, the others are decked or tiered charges. Variation of pore water pressure, cone penetration tests and surface elevation changes are measured. The results of laboratory, tests prove that the decked and tiered charges are more effective for ground treatment in explosive compaction： The more uniform distribution of energy release, the mote effective for ground treatment. However, the evaluation of uniform distribution of energy is only qualitative, not quantitative.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第A02期5443-5448,共6页
Chinese Journal of Rock Mechanics and Engineering
关键词
岩土工程
爆炸密实法
饱和砂地基
模型试验
geotechnical engineering
explosive compaction
saturated soil foundatiom model test
