城市复杂环境条件下深基坑工程实践  

Deep Excavation Practice under Complicated Urban Environmental Conditions

作　　者：郑威 王海成 ZHENG Wei;WANG Haicheng(China Machinery TIDI Geotechnical Engineering Co.Ltd.,Wuhan 430000)

机构地区：[1]中机三勘岩土工程有限公司,武汉430000

出　　处：《土工基础》2024年第1期57-61,共5页Soil Engineering and Foundation

摘　　要：某深基坑工程地处武汉市深厚软土地面沉降重点防控区,基坑开挖深度较大,深厚砂层中赋存高水头承压水,基坑开挖已经揭露承压水含水层。项目地处主城区,施工场地狭小,周边环境复杂,对基坑变形比较敏感,环境保护要求高。通过采用安全有效的基坑支护降水设计方案,采取严格的质量保证措施,预防基坑发生渗流破坏,较好地控制了基坑支护体系的变形,避免了对周边环境产生不利影响。结合项目特点采用受力性能合理的圆环形桁架式内支撑,释放更大场地空间,提高了施工效率。通过全过程基坑监测,为基坑支护体系的安全运行提供信息化支撑,保证了基坑的平稳运行和周边环境的安全。A deep excavation project in Wuhan is in the key prevention and control area of deep and thick and soft soil area.The depth of the proposed excavation is large.The artisan water with high head exists in the deep sand layer and the aquifer has been exposed.At the same time,the project is in the main urban area of Wuhan.The construction site is narrow,and the adjacent environment is complicated.The deformation of the deep excavation is sensitive,and the requirements of the environmental protection are restrictive.By adopting the safe and effective design of supporting,dewatering and strictive quality assurance measures,the seepage failure can be avoided,and the deformation of the supporting system can be well controlled.The adverse effects on the adjacent environment can be avoided.Based on the characteristics of the project,the circular type of the internal supporting system with a reasonable force performance is adopted to release more space and improve the construction efficiency.The entire process of the deep excavation monitoring provides information support for a safe deep excavation.

关 键 词：基坑工程 软土地区 渗流破坏 复杂环境 

分 类 号：TU473[建筑科学—结构工程]