特殊地质条件下沉井基础抗压承载特性及施工技术研究  

Research on Compressive Bearing Characteristics and Construction Technology of Open Caisson Foundation under Special Geological Condition

作　　者：方亮 FANG Liang(Shenzhen Municipal Group Co.,Ltd.,Shenzhen 518000,Guangdong,China)

机构地区：[1]深圳市政集团有限公司,广东深圳518000

出　　处：《工程技术研究》2024年第22期64-66,共3页Engineering and Technological Research

摘　　要：文章根据地质调查数据、结构设计及沉井基础的当前状态,建立三维计算模型,并应用Mohr-Coulomb模型进行数值模拟。研究发现,新增管柱结构(pipeline construction system,PCS)显著改善了沉井基础的承载性能,尤其在极限载荷条件下,PCS有效分担了上部结构荷载,减少了沉井的倾斜和不均匀沉降。此外,还提出改进的施工技术,包括注浆加固方案及新增结构的施工步骤,以确保沉井基础的长期稳定性。研究结果可为类似工程提供理论依据和技术支持。According to the geological investigation data,structural design and the current state of the open caisson foundation,a 3D calculation model is established,and the Mohr-Coulomb model is used for numerical simulation.It is found that the new pipeline construction system(PCS)significantly improves the bearing capacity of the open caisson foundation.Especially under the ultimate load condition,PCS effectively shares the load of the superstructure and reduces the inclination and uneven settlement of the open caisson.In addition,improved construction techniques are proposed,including grouting reinforcement schemes and construction steps of new structures,to ensure the long-term stability of the open caisson foundation.The research results can provide theoretical basis and technical support for similar engineering.

关 键 词：特殊地质 沉井基础抗压 承载特性 极限载荷 

分 类 号：U443.131[建筑科学—桥梁与隧道工程]