软土地区邻近既有建筑物深基坑支护施工技术研究
Research on Construction Technology of Deep Foundation Pit Support Adjacent to Existing Building in Soft Soil Area
李艳荣 1付超 2雷佳2
作者信息
- 1. 武汉市汉阳市政建设集团有限公司,湖北 武汉 430000
- 2. 武汉致远建设集团有限公司,湖北 武汉 430000
- 折叠
摘要
受软土地质属性的影响,对该类环境下的深基坑进行有效支护是控制其位移发展的重要措施.为此,文章研究软土地区邻近既有建筑物深基坑支护施工技术.结合深基坑施工区域的地质情况,采用钻进旋喷搅拌的方式在桩基定位点进行钻进和喷浆同步施工.在支护结构施工阶段,采用压力钻成孔法进行施工.测试结果表明,120 d内测试深基坑四周的水平位移和纵向位移分别稳定在20 mm和21 mm以内,表现出较高的稳定性.
Abstract
Influenced by the geological properties of soft soil,the effective support of deep foundation pit in this kind of environment is an important measure to control its displacement development.In this regard,this paper studies the construction technology of deep foundation pit support adjacent to existing buildings in soft soil area.Combined with the geological conditions of the deep foundation pit construction area,the drilling and shotcreting synchronous construction is carried out at the pile foundation positioning point by drilling rotary jet mixing.In the construction stage of the supporting structure,the pressure drilling hole forming method is used for construction.The test results show that the horizontal displacement and longitudinal displacement around the deep foundation pit are stable within 20 mm and 21 mm respectively within 120 days,showing high stability.
关键词
软土地区/邻近既有建筑物/深基坑支护施工/钻进旋喷搅拌/支护桩基/压力钻成孔法Key words
soft soil area/adjacent to existing building/deep foundation pit support construction/drilling rotary jet mixing/supporting pile foundation/pressure drilling hole forming method引用本文复制引用
出版年
2024
NETL
NSTL
万方数据