摘要
在美兰国际机场二期航站楼桩基施工过程中,在地下19~60m存在多层不连续分布的贝壳碎屑岩层,贝壳碎屑岩层是海南特有的地质条件,该岩层主要由生物碎屑、石英砂颗粒及泥钙质胶结组成,内部生物化石碎片较多,孔洞发达,内部呈弱胶结状,极不稳定,钻进漏水严重。在贝壳碎屑岩层中旋挖钻进极易造成快速漏浆和塌孔,为了保证桩身成孔质量、提高I类桩成桩率,同时有效加快施工进度和减少因漏浆、塌孔造成的返工成本,结合现场条件及以往施工经验,积极制定对策,形成了针对海南省贝壳碎屑岩环境中钻孔灌注桩施工工艺技术。
During the construction of the pile foundation of the second phase of the Haikou Meilan International Airport,there are many layers of discontinuous Shell clastic rock layers 19 to 60 meters underground,which is unique to Hainan,the formation is mainly composed of bioclast,quartz sand grain and argillaceous calcareous cementation.There are many biofossil fragments in the formation,with well-developed pores and weak cementation in the formation.In order to ensure the quality of pile body and improve the pile rate of class I pile,at the same time,effectively speed up the construction progress and reduce the rework cost caused by leakage and collapse,combined with the site conditions and previous construction experience,the construction technology of bored pile in the shell detrital rock environment of Hainan Province is formed.
作者
赵纯
李厚杰
王晓龙
谢孝诚
何启明
ZHAO Chun;LI Houjie;WANG Xiaolong;XIE Xiaocheng;HE Qiming(Beijing Fourth Construction&Engineering Co.,Ltd.,Beijing 100075,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S01期3113-3114,共2页
Building Structure
关键词
旋挖灌注桩
贝壳碎屑岩层
专用护壁泥浆
水泥土拌合物换填
rotary digging cast-in-place pile
shell detrital rock stratum
special wall protection mud
cement-soil mixture replacement filling
作者简介
第一作者:赵纯,学士,高级工程师,一级注册建造师,主要从事公司工程施工质量管理工作,Email:2662576349@qq.com;通信作者:李厚杰,学士,工程师,一级注册建造师,主要从事工程施工项目技术质量管理工作,Email:2077323024@qq.com。
