Technical thorny problems met during construction of cast - in - situ piles at riprap backfilling area and corresponding countermeasures are expounded to serve as a reference for similar engineering 摘要介绍爆破抛石回填区域钻孔灌注桩施工中遇到的技术难题，并提出相应的处理措施。对类似工程部位施工有一定的借鉴作用。
