应急抢险修复工程中砂卵石地层的振冲挤密桩技术研究  

RESEARCH ON VIBRO-COMPACTION PILE TECHNOLOGY OF SAND AND GRAVEL STRATUM IN EMERGENCY REPAIR PROJECT

作　　者：朱永炯 Zhu Yong-jiong

机构地区：[1]中国水利水电第十一工程局有限公司,郑州450000

出　　处：《建筑技术开发》2024年第11期158-160,共3页Building Technology Development

摘　　要：研究通过采用砂砾料预筛分、振冲地基顶部预加固、旋挖钻引孔及采用新型进口大功率振冲器等,有效减少了振冲桩造孔及振冲过程对地层的扰动。当荷载值为350 kPa时,振冲挤密桩的沉降量仅为49.21 mm,远小于允许最大沉降量。同时,振冲挤密桩的单桩复合地基承载力特征值的平均值为160 kPa,其满足设计要求。由此可知,研究提出的施工方法可有效保证砂卵石地层振冲挤密桩的施工质量。The study effectively reduced the disturbance of the formation caused by the drilling and vibration process of the vibration pile by using pre screening of sand and gravel materials,pre reinforcement of the top of the vibration foundation,rotary drilling and drilling of boreholes,and the use of a new imported high-power vibration device.When the load value is 350 kPa,the settlement of the vibration compaction pile is only 49.21 mm,far less than the maximum allowable settlement.At the same time,the average characteristic value of the bearing capacity of the single pile composite foundation of the vibration compaction pile is 160 kPa,which meets the design requirements.From this,it can be seen that the construction method proposed in the study can effectively ensure the construction quality of vibration compaction piles in sand and gravel formations.

关 键 词：应急抢险 砂卵石地层 振冲挤密桩 质量控制 

分 类 号：TU472[建筑科学—结构工程]