高填方石方路基桩基冲击钻进影响因素及处理方法  

Interfering Factors and Treatment Methods of Impact Drilling for Pile Foundation of High-fill Rock Subgrade

作　　者：王双武 唐德平 WANG Shuang-wu;TANG De-ping(POWERCHINA SINOHYDRO ENGINEERING BUREAU 14 CO.,LTD.,Kunming 650041,China)

机构地区：[1]中国水利水电第十四工程局有限公司,云南昆明650041

出　　处：《云南水力发电》2022年第7期47-49,共3页Yunnan Water Power

摘　　要：在高填方石方路基上进行桩基冲击钻进施工,不可避免地会发生偏孔、漏浆、塌孔、卡钻等不利因素,选择适当的处理方法,如偏孔时回填片石、片石混凝土等方法,漏浆时回填优质黏土、低标号混凝土等方法,塌孔时回填片石、混凝土等方法,卡转时高压冲击、爆破等方法,可以达到较好处理效果,有利于节约成本,保证施工安全,控制施工工期。When percussion drilling of pile foundation is carried out on high filling rock subgrade,unfavorable factors such as deviation hole,grout leakage,collapse hole and stuck drill will inevitably occur.Appropriate treatment methods are selected,such as backfilling schist and schist concrete when deflecting holes,backfilling high-quality clay and low-grade concrete when leaking grout,backfilling schist and concrete when collapsed holes,high-pressure impact and blasting when stuck,which can achieve better treatment effect.It is beneficial to save cost,ensure construction safety and control construction period.

关 键 词：高填方 石方路基 桩基 冲击钻进 影响因素 处理方法 

分 类 号：U416.11[交通运输工程—道路与铁道工程]